SCI 발표논문
2008년 130편
- 1002008
제1저자 조수정 · 교신저자 김주성
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Simvastatin induces apoptosis in human colon cancer cells and in tumor xenografts, and attenuates colitis-associated colon cancer in mice.Int J Cancer. 2008;123(4):951-7.
PubMed IF 4.9 소화기내과Abstract
Statins, HMG-CoA reductase inhibitors could be associated with the risk reduction of colorectal cancer. We previously demonstrated that simvastatin inhibits NF-kappaB signaling in human intestinal epithelial cells and ameliorates acute murine colitis. The aim of our study was to evaluate the effects of simvastatin on the apoptotic pathways related to NF-kappaB signaling in colon cancer cells, and on anticancer effects in 2 different animal models. We treated cell lines (COLO 205 and HCT 116) with simvastatin or vehicle and determined apoptosis by cell cycle analysis, Annexin V-FITC staining, caspase-3 activity assay and confocal microscopy. We assessed the expression of antiapoptotic factors by RT-PCR and Western blotting. In the colitis-associated colon cancer (CAC) model, we induced colonic tumors in C57/BL6 mice by azoxymethane and dextran sulfate sodium administration, and evaluated simvastatin's effect on tumor growth. In the xenograft model, we evaluated its effect on the inoculated tumor growth. In both cell lines, simvastatin caused dose- and time-dependent cell death. Annexin V staining significantly increased after simvastatin treatment. It augmented caspase-3 activity and downregulated the expression of Bcl-2, Bcl-xL, cIAP1 and cFLIP. In the CAC model, simvastatin significantly reduced tumor development. In the xenograft model, tumors from animals treated with simvastatin had smaller volumes, larger necrotic areas, lower expression of VEGF and higher apoptotic scores. In conclusion, simvastatin inhibited colon cancer development by induction of apoptosis and suppression of angiogenesis. These results suggest that simvastatin could be a potential chemopreventive and therapeutic agent of CAC as well as de novo colon cancer.
- 992008
제1저자 정성수 · 교신저자 박경수
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Activation of PPARgamma negatively regulates O-GlcNAcylation of Sp1.Biochem Biophys Res Commun. 2008;372(4):713-8.
PubMed IF 2.5 내분비대사내과Abstract
O-GlcNAcylation is a kind of post-translational modification and many nuclear and cytoplasmic proteins are O-GlcNAcylated. In this study, we demonstrated that thiazolidinediones (TZDs), which are used as insulin sensitizer, specifically inhibited the O-GlcNAcylation of Sp1 but did not affect the O-GlcNAcylation of the total proteins in cell culture systems and mouse models. This effect was mediated by peroxisome proliferator activated receptor gamma (PPARgamma) activation and probably by synthesis of a specific protein induced by PPARgamma activation. In addition, we demonstrated that the O-GlcNAcylation sites in the zinc-finger domain were involved in the transcriptional activation of Sp1 and that rosiglitazone, a member of TZDs, affected Sp1 transcriptional activity partially by regulating the O-GlcNAcylation level of these sites. Considering the role of hexosamine biosynthesis pathway in hyperglycemia-induced insulin resistance and Sp1 in the hyperglycemia-induced gene expression, the regulation of Sp1 O-GlcNAcylation by TZDs may help to explain the function of TZDs as a treatment for insulin resistance and diabetes.
- 982008
제1저자 김미나 · 교신저자 김나영
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The effects of probiotics on PPI-triple therapy for Helicobacter pylori eradication.Helicobacter. 2008;13(4):261-8.
PubMed IF 4.6 소화기내과Abstract
BACKGROUND This study was performed to evaluate whether the addition of probiotics to proton pump inhibitor (PPI)-based triple therapy increases the likelihood of successful Helicobacter pylori eradication.
MATERIALS AND METHODS Three hundred and forty-seven H. pylori-infected patients were randomized into a triple-plus-yogurt group (yogurt group, n = 168) or a triple-only group (control group, n = 179). Triple therapy consisted of PPI b.i.d., clarithromycin 500 mg b.i.d., and amoxicillin 1 g b.i.d. for 7 days. Yogurt group received triple therapy for 1 week and one bottle of Will yogurt per day for at 3 weeks, starting on the first day of triple therapy. Will yogurt (a Korean brand) contains Lactobacillus acidophilus HY2177, Lactobacillus casei HY2743, Bifidobacterium longum HY8001, and Streptococcus thermophilus B-1. (13)C-urea breath test was performed at least 4 weeks after completion of triple therapy. Eradication rates, compliances, and adverse events were compared.
RESULTS By intention-to treat analysis the H. pylori eradication rates in the yogurt group 79.2% (133 of 168) was similar to that in the control group 72.1% (129 of 179) (p = .124). However, by per-protocol (PP) analysis, the eradication rate in the yogurt group, 87.5% (133 of 152) was higher than that in the control group, 78.7% (129 of 164) (p = .037). Common adverse events were metallic taste (11.8%) and diarrhea (8.6%). The frequency of adverse effects in the yogurt group 41.1% (69/168) were higher than in the control group, 26.3% (47 of 179) (p = .003). However, most adverse events were mild to moderate in intensity, and the severities of adverse effects were similar in both groups (p = .401).
CONCLUSIONS The addition of Will yogurt to triple therapy did not reduce the side-effects of triple therapy. But it increased the H. pylori eradication rate by PP analysis, encouraging more research in this field.
- 972008
제1저자 김나영 · 교신저자 정현채
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Prevalence and risk factors of atrophic gastritis and intestinal metaplasia in a Korean population without significant gastroduodenal disease.Helicobacter. 2008;13(4):245-55.
PubMed IF 4.6 소화기내과Abstract
BACKGROUND AND AIM The prevalence of gastric cancer and Helicobacter pylori infection is unacceptably high in Korea. This study was performed to evaluate the prevalence of atrophic gastritis (AG) and intestinal metaplasia (IM) and to identify their risk factors with respect to H. pylori virulence factors, and environmental and host factors, in Korean population without significant gastroduodenal disease.
METHODS The study cohort consisted of 389 subjects (> or = 16 years). AG and IM were scored histologically using the Sydney classification in the antrum and body, respectively. Prevalences and bacterial factors (i.e. cagA, vacA m1, and oipA), environmental factors (i.e. smoking and alcohol), and host factors (i.e. genetic polymorphisms of IL-1B-511, IL-1RN, TNF-A-308, IL-10-592, IL-10-819, IL-10-1082, IL-8-251, IL-6-572, GSTP1, p53 codon 72, and ALDH2) were evaluated.
RESULTS Prevalences of AG in the antrum and body were 42.5% and 20.1%, and those of IM were 28.6% and 21.2%, respectively. The presences of AG and IM were significantly higher in H. pylori-positive than in the H. pylori-negative subjects. Multivariate analysis showed that the risk factors for AG were H. pylori infection, age > or = 61 years, and cagA and vacA m1 positivity. For IM the risk factors were H. pylori infection, age > or = 61 years, a smoking history (rather than current smoking), strong spicy food, occupation (unemployed or nonprofessional vs. professional), and the presence of IL10-592 C/A as opposed to A/A. In addition, IL6-572 G carrier was found to have a protective effect against IM development as compared with C/C.
CONCLUSION H. pylori infection was most important risk factor of AG and IM. Bacterial factors were found to be important risk factor for AG but environmental and host factors were more important for IM.
- 962008
제1저자 이정훈 · 교신저자 김나영
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Long-term follow up of Helicobacter pylori IgG serology after eradication and reinfection rate of H. pylori in South Korea.Helicobacter. 2008;13(4):288-94.
PubMed IF 4.6 소화기내과Abstract
BACKGROUND Serology is widely used for epidemiologic research of Helicobacter pylori. However, there is limited information on the long-term follow up of H. pylori titers after eradication. In addition, it is presumed that the reinfection rate decreases as the H. pylori infection rate decreases. The aim of this study was to investigate the long-term follow up of H. pylori IgG, and to evaluate the reinfection rate of H. pylori in Korea.
METHODS Among 247 patients, who were enrolled during 2003-07, 185 patients with invasive H. pylori test positive received proton pump inhibitor-based triple therapy, and follow-up H. pylori testing, including histology, CLOtest, culture, and serology, were evaluated 2, 10, and 18 months after H. pylori eradication.
RESULTS The initial H. pylori IgG optical density (OD(450 nm)), 2.06, gradually decreased to 0.63 (67% reduction) at 18 months after H. pylori eradication. The seroreversion rate was 5, 10, and 45% at 2, 10, and 18 months after H. pylori eradication, respectively. The recrudescence of H. pylori was 3.49%, and the annual reinfection rate was 2.94% per year. H. pylori IgG titers abruptly increased in cases with recrudescence and reinfection, and correlated with the results of the invasive H. pylori tests.
CONCLUSION The results of this study showed that H. pylori IgG serology could be used for the determination of reinfection of H. pylori, but not for the diagnosis of H. pylori eradication. The reinfection rate of H. pylori, in Korea, was found to be very low, 2.94% per year.
- 952008
제1저자 장성아 · 교신저자 장혁재
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Usefulness of 64-slice multidetector computed tomography as an initial diagnostic approach in patients with acute chest pain.Am Heart J. 2008;156(2):375-83.
PubMed IF 3.4 순환기내과Abstract
BACKGROUND Recently, multidetector computed tomography (MDCT) has been proposed as an accurate diagnostic tool to evaluate for coronary artery disease. However, the role of MDCT as part of the initial diagnostic for evaluating acute chest pain is less well established.
METHODS We prospectively enrolled patients presenting with acute chest pain to the emergency department (ED) and risk stratified them based on the pretest probability for an acute coronary syndrome (ACS): (1) very low, (2) low, (3) intermediate, (4) high, and (5) very high or definite. After exclusion of very low and very high risk patients, 268 patients were randomized to either immediate 64-slice cardiac MDCT or a conventional diagnostic strategy. Number of admissions, ED and hospital length of stay (LOS), and major adverse cardiac events over 30 days of follow-up were compared between the strategies based on the pretest probability for ACS.
RESULTS The number of patients ultimately diagnosed with an ACS did not differ between the 2 strategies. Emergency department LOS and total admissions were not different between strategies. Patients in the MDCT-based strategy had a decreased hospital LOS (P = .049) and fewer admissions deemed unnecessary (P = .007). Reductions in unnecessary admissions were more prominent in intermediate-risk patients (P = .015). None of the patients discharged from the ED in the MDCT-based strategy experienced major adverse cardiac events at follow-up.
CONCLUSION Use of an MDCT-based strategy in the ED as part of the initial diagnostic approach for patients presenting with acute chest pain is safe and efficiently reduces avoidable admissions in patients with an intermediate pretest probability for ACS.
- 942008
제1저자 김태민 · 교신저자 허대석
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Clinical heterogeneity of extranodal NK/T-cell lymphoma, nasal type: a national survey of the Korean Cancer Study Group.Ann Oncol. 2008;19(8):1477-1484.
PubMed IF 80.4 혈액종양내과Abstract
BACKGROUND This national survey was undertaken to propose the classification of extranodal natural killer (NK)/T-cell lymphoma (NTCL) subtypes and to clarify a clinical heterogeneity.
PATIENTS AND METHODS Two hundred and eighty patients newly diagnosed as NTCL were enrolled from 22 Korean medical centers. Two subsets were compared: one involving the upper aerodigestive tract (UAT) and another involving the non-upper aerodigestive tract (NUAT) region, which comprises the skin, gastrointestinal tract, and liver or soft tissues. Clinical prognostic factors, survival outcomes, and independent predictors for survival were compared between each subset.
RESULTS NUAT-NTCL (59 patients) had significantly higher proportions of disseminated disease, aggressive biologic features, and unfavorable host reactions compared with UAT-NTCL (221 patients). NUAT-NTCL had shortened 5-year overall survival (OS) (22% versus 41%, P = 0.001). Ann Arbor staging, the International Prognostic Index, and the NTCL prognostic index failed to predict the OS of NUAT-NTCL, but did predict the OS in UAT-NTCL. Independent predictors for OS by multivariate analyses differed between each subset. In the NUAT subset, extranodal sites and regional nodes predicted the OS, while Ann Arbor staging, age, performance status, and lactate dehydrogenase level predicted the OS in the UAT subset.
CONCLUSION NUAT-NTCL may represent a distinctive disease entity in terms of clinical factors, independent predictors, and survival outcomes.
- 932008
제1저자 김광일 · 교신저자 김철호
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Current status and characteristics of hypertension treatment by primary physicians in Korea: data from Korean epidemiology study on hypertension (KEY study).Am J Hypertens. 2008;21(8):884-9.
PubMed IF 2.9 노인병내과Abstract
BACKGROUND This study was designed to investigate the characteristics, control rate, and factors affecting BP control in hypertensive patients treated by primary physicians in Korea.
METHODS The study was a multicenter, nationwide, cross-sectional, population-based survey conducted to identify the current status of hypertension treatment in Korean patients. A direct mail survey was sent to a random sample of 800 primary-care clinics across the nation. A total of 529 physicians in 510 clinics agreed to participate in this study (63.8%). Among the recruited 13,452 patients, 13,184 were included in the analysis.
RESULTS BP was controlled in 6,723 patients (51.0%). However, the control rate was lower in patients with diabetes (21.6%) or chronic kidney disease (CKD) (19.9%). Furthermore, the mean systolic and diastolic BP levels were higher in patients with diabetes and/or CKD. The mean BP level was higher in patients undergoing combination therapy than those undergoing single-drug therapy. Male gender, cardiovascular comorbidities, long duration of hypertension, and unhealthy lifestyle were associated with poor control of hypertension. In multivariate analysis, diabetes (odds ratio: 5.57; 95% confidence interval: 5.05-6.13) and CKD (odds ratio: 3.40; 95% confidence interval: 2.54-4.54) were the most significant independent factors related to poor BP control.
CONCLUSION BP control is still largely unsatisfactory, especially in patients with diabetes and kidney disease, who could benefit the most from effective BP control. The reasons for poor BP control and high BP levels in those patients need to be investigated to improve BP control in Korea.
- 922008
제1저자 임종필 · 교신저자 김상균
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Clinical outcomes and patency of self-expanding metal stents in patients with malignant colorectal obstruction: a prospective single center study.Int J Colorectal Dis. 2008;23(8):789-94.
PubMed IF 2.9 소화기내과Abstract
BACKGROUNDS AND AIMS Self-expanding metal stents (SEMS) have been used as a palliative treatment for malignant colorectal obstruction. However, the reports about primary stent patency rate and associated factors have been limited. This study was performed to evaluate clinical outcomes and factors associated with long-term complications and patency of SEMS in patients with malignant colorectal obstruction.
MATERIALS AND METHODS Patients who underwent palliative endoscopic placement with uncovered SEMS for a malignant colorectal obstruction were prospectively enrolled at Seoul National University Hospital between April 2005 and August 2007.
RESULTS Forty-nine patients underwent 51 SEMS placements. Obstruction sites were rectum in 15 patients (30.6%), descending or sigmoid colon in 25 (51.0%), and transverse colon in nine (18.4%), respectively. The causes of obstruction were colorectal cancer in 36 patients (73.5%), direct invasion of gastric cancer in seven (14.3%) and others in six (12.2%). Technical success was achieved in 100% and clinical success in 86%, and there was one procedure-related perforation. Re-obstruction and migration occurred in 16% and 6%, respectively, during mean follow-up period of 331 days. Median stent patency duration was 204 days, and patency rates at 30, 90, and 180 days were 91.2%, 81.0%, and 53.3%, respectively, which was not associated with patient demographics, site of obstruction, or palliative chemotherapy.
CONCLUSION Endoscopic SEMS placement is a safe and effective palliative treatment for malignant colorectal obstruction, and overall long-term complication and patency were favorable irrespective of the palliative chemotherapy.
- 912008
제1저자 권혁수 · 교신저자 장윤석
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Correlation between the Korean version of Asthma Control Test and health-related quality of life in adult asthmatics.J Korean Med Sci. 2008;23(4):621-7.
PubMed IF 3.2 알레르기내과Abstract
The Asthma Control Test (ACT) is a patient-completed questionnaire developed to assess asthma control. Health-related quality of life (HRQL) in asthmatics has shown relatively low correlations with parameters of asthma control and the relationship between the ACT and HRQL in asthmatics is yet unclear. Because revalidations of translated versions of questionnaires are critical for its utilization, we first sought to validate the Korean version of ACT and then to evaluate the relationship between the ACT and HRQL. Patients (n=117) completed the ACT and asthma-related quality of life questionnaire (AQLQ) at 3 physician visits. Pulmonary function was measured and an asthma specialist rated asthma control. The Korean version of ACT was found to be reliable, valid, and responsive to changes in asthma control over time up to three consecutive visits. ACT scores correlated significantly (p=0.001) with symptoms domain (r=0.72), activity domain (r=0.65), emotional domain (r=0.69), and environmental domain (r=0.67) of AQLQ. In conclusion, the Korean version of the ACT was found to be a reliable and valid tool for measuring asthma control, and to correlate well with AQLQ scores. Moreover, the ACT was responsive to changes in AQLQ scores over time.
- 902008
제1저자 강정묵 · 교신저자 김나영
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Effect of the CYP2C19 polymorphism on the eradication rate of Helicobacter pylori infection by 7-day triple therapy with regular proton pump inhibitor dosage.J Gastroenterol Hepatol. 2008;23(8 Pt 1):1287-91.
PubMed IF 3.5 소화기내과Abstract
BACKGROUND AND AIM Proton pump inhibitors (PPI) are mainly metabolized by cytochrome P450 2C19 (CYP2C19) in the liver. We investigated whether the CYP2C19 genotype plays a role in the eradication rate of Helicobacter pylori (H. pylori) infection in patients receiving pantoprazole- or esomeprazole-based triple therapy.
METHODS A total of 327 patients infected with H. pylori were treated with either pantoprazole or esomeprazole, plus amoxicillin and clarithromycin for 7 days. The presence of the CYP2C19 genotype was determined by pyrosequencing.
RESULTS The overall H. pylori eradication rate was 85%; 82.6% for the PAC regimen, and 88.3% for the EAC regimen; the differences were not statistically significant. The overall eradication rate in the poor metabolizer groups (PM) was significantly higher than in the extensive metabolizer groups (EM) (97.4% vs 83.3%; P = 0.016). The eradication rates in the EM and PM groups were 80.8% and 95.7% for the PAC regimen and 86.8% and 100% for the EAC regimen, respectively.
CONCLUSION The results of this study suggest that the CYP2C19 genotype status may play a role in the H. pylori eradication rate in patients receiving pantoprazole or esomeprazole-based triple therapy.
- 892008
제1저자 김영선 · 교신저자 김나영
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The efficacy of intravenous contrast-enhanced 16-raw multidetector CT colonography for detecting patients with colorectal polyps in an asymptomatic population in Korea.J Clin Gastroenterol. 2008;42(7):791-8.
PubMed IF 2.7 소화기내과Abstract
PURPOSE The purpose of this study is to compare the sensitivity of computed tomography (CT) colonography (CTC) with that of colonoscopy for detecting patients with colorectal polyps in an asymptomatic screening population in Korea, thus to evaluate a possibility, whether CTC could be used as a screening tool for colorectal polyps.
METHODS A total of 241 asymptomatic adults underwent intravenous contrast-enhanced CTC and colonoscopy successively on the same day. Bowel preparation was performed by 4 L of polyethylene glycol (n=172) or 90 mL of sodium phosphate (n=69). The CTC findings were released to the colonoscopists after the first examination of each segment, a procedure known as segmental unblinded colonoscopy, and were used as the reference standard. The diagnostic performance of CTC for colorectal polyps was calculated.
RESULTS The per-patient sensitivities of CTC were 68.5% (37/54) and 86.7% (13/15) for polyp > or = 6 and > or = 10 mm, inferior to those of colonoscopy, 92.6% (50/54) and 100% (15/15), respectively. The per-polyp sensitivities of CTC were 60.4% (61/101) and 72.7% (16/22) for polyp > or = 6 and > or = 10 mm, respectively. The low sensitivity of CTC was related with flat morphology. CTC detected only 37.5% (9/24) of flat polyps > or = 6 mm. Bowel preparation by sodium phosphate further decreased the positive predictive value and specificity than by polyethylene glycol.
CONCLUSIONS Screening by CTC with asymptomatic population was not promising in Korea despite using advanced CT technology (16-row detector). Bowel preparation was one of the key determinants of the specificity of CTC.
- 882008
제1저자 박경수 · 교신저자 이홍규
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Implication of genetic variants near TCF7L2, SLC30A8, HHEX, CDKAL1, CDKN2A/B, IGF2BP2, and FTO in type 2 diabetes and obesity in 6,719 Asians.Diabetes. 2008;57(8):2226-33.
PubMed IF 9.3 내분비대사내과Abstract
OBJECTIVE Recent genome-wide association studies have identified six novel genes for type 2 diabetes and obesity and confirmed TCF7L2 as the major type 2 diabetes gene to date in Europeans. However, the implications of these genes in Asians are unclear.
RESEARCH DESIGN AND METHODS We studied 13 associated single nucleotide polymorphisms from these genes in 3,041 patients with type 2 diabetes and 3,678 control subjects of Asian ancestry from Hong Kong and Korea.
RESULTS We confirmed the associations of TCF7L2, SLC30A8, HHEX, CDKAL1, CDKN2A/CDKN2B, IGF2BP2, and FTO with risk for type 2 diabetes, with odds ratios ranging from 1.13 to 1.35 (1.3 x 10(-12) < P(unadjusted) < 0.016). In addition, the A allele of rs8050136 at FTO was associated with increased BMI in the control subjects (P(unadjusted) = 0.008). However, we did not observe significant association of any genetic variants with surrogate measures of insulin secretion or insulin sensitivity indexes in a subset of 2,662 control subjects. Compared with subjects carrying zero, one, or two risk alleles, each additional risk allele was associated with 17% increased risk, and there was an up to 3.3-fold increased risk for type 2 diabetes in those carrying eight or more risk alleles. Despite most of the effect sizes being similar between Asians and Europeans in the meta-analyses, the ethnic differences in risk allele frequencies in most of these genes lead to variable attributable risks in these two populations.
CONCLUSIONS Our findings support the important but differential contribution of these genetic variants to type 2 diabetes and obesity in Asians compared with Europeans.
- 872008
제1저자 임춘수 · 교신저자 임춘수
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Megsin 2093T-2180C haplotype at the 3' untranslated region is associated with poor renal survival in Korean IgA nephropathy patients.Clin Nephrol. 2008;70(2):101-9.
PubMed IF 0.8 신장내과Abstract
AIMS Megsin is a mesangial cell-predominant gene which belongs to the serpin superfamily. The expression of megsin was upregulated and coincided with mesangial proliferation and extracellular matrix expansion in IgA nephropathy (IgAN). In the present study, we evaluated the influence of the C2093T and C2180T polymorphism within the 3' untranslated region (3'UTR) of megsin gene and its haplotypes on the development and progression of Korean IgAN patients.
METHODS Korean IgAN patients (n = 260) with a minimal follow-up of 4 years were recruited. Healthy subjects with normal renal function, normal urinalysis and normotension (n = 315) were included as controls. The polymorphisms were determined by the 5' nuclease allelic discrimination assay, and the haplotypes were constructed using the Phase program.
RESULTS The C2093T and C2180T genotype and allele frequencies were not different significantly between IgAN patients and controls. In C2093T polymorphism, patients with CC genotype showed a better renal survival than those with CT or TT genotypes by Kaplan-Meier analysis (p = 0.027). The megsin C2093T polymorphism remained an independent risk factor for progression (Cox regression model, HR for TT genotype: 3.52, 95% CI 1.69 - 7.34; HR for CT genotype: 2.15, 95% CI 1.30 - 3.57). In C2180T polymorphism, patients with TT genotype showed a better outcome than those with CC or CT genotypes (p = 0.025). The C2180T polymorphism was also an independent risk factor for progression (HR for CC genotype: 4.05, 95% CI 1.93 - 8.51; HR for CT genotype: 2.35, 95% CI 1.40 - 3.94). The two alleles showed linkage disequilibrium in phased haplotype. The patients with 2093T-2180C haplotype showed a poor renal survival compared to those with 2093C-2180T haplotype (p = 0.028). The haplotype remained an independent risk factor for progression (HR for 2093T-2180C haplotype: 2.01, 95% CI 1.44 - 2.81).
CONCLUSIONS Our results suggest that the 2093T-2180C haplotype at the 3'UTR of megsin gene is associated with rapid disease progression in Korean IgAN patients. This is the reverse of the results from the Chinese IgAN patients. Further studies are strongly needed to elucidate the reasons of disparity.
- 862008
제1저자 Han HR · 교신저자 박경수
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Genetic variations in the leptin and leptin receptor genes are associated with type 2 diabetes mellitus and metabolic traits in the Korean female population.Clin Genet. 2008;74(2):105-15.
PubMed IF 2.1 내분비대사내과Abstract
Type 2 diabetes mellitus (T2DM) is a metabolic disorder that is characterized by insulin resistance and hyperglycemia. Leptin inhibits the glucose-stimulated insulin secretion, and leptin receptors are present on beta cells as well as on fat cells, thus enabling leptin to modulate both insulin secretion and action. Therefore, leptin (LEP) and leptin receptor (LEPR) genes could play a role in the regulation of glucose and insulin after an oral glucose load. For the association study of LEP and LEPR with T2DM and metabolic traits, 752 women from Seoul National University Hospital (SNUH data) and 532 women from the Korean Health and Genome Study (KHGS data) were selected. Using the SNUH data, we identified that LEP-632G>A and +4998A>C polymorphisms were marginally associated with T2DM, LEP+4950G>A was significantly associated with several metabolic traits, and LEPR+5193G>A, +7187A>C, +27265G>A, +35861T>C, and +52289A>G showed strongly significant association with body mass index (BMI). We observed reproducibility of these results using the KHGS data; LEP+4950G>A and +4998A>C were significantly associated with systolic blood pressure and low-density lipoprotein cholesterol level, respectively. In conclusion, we observed that several polymorphisms in LEPR that had previous reports of association with BMI were significantly replicated in our samples and newly found that some variations of LEP were associated with T2DM and metabolic traits.
- 852008
제1저자 최성희 · 교신저자 장학철
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High plasma retinol binding protein-4 and low plasma adiponectin concentrations are associated with severity of glucose intolerance in women with previous gestational diabetes mellitus.J Clin Endocrinol Metab. 2008;93(8):3142-8.
PubMed IF 5.4 내분비대사내과Abstract
CONTEXT Women with previous gestational diabetes mellitus (pGDM) are at high risk of developing type 2 diabetes mellitus in the future. The role of adipokines in women with pGDM has not been established.
OBJECTIVE We investigated whether circulating adipokine concentration is associated with abnormal glucose homeostasis in women with pGDM. DESIGN, SETTING, PATIENTS, AND MAIN OUTCOME MEASURES: We measured the plasma concentrations of retinol-binding protein-4 (RBP4), transthyretin (TTR), and adiponectin and metabolic parameters in four groups of women who exhibited normal glucose tolerance (NGT) during a previous pregnancy (NP, n = 17), NGT after GDM (GDM-NGT, n = 72), impaired glucose tolerance after GDM (GDM-IGT, n = 60), and type 2 diabetes after GDM (GDM-DM, n = 8).
RESULTS Plasma RBP4 concentration was significantly higher in women with GDM-DM, GDM-IGT, and GDM-NGT than in those with NP. RBP4 concentration correlated positively with TTR concentration; fasting plasma glucose, insulin, and triglyceride concentrations; blood pressure; abdominal fat area; and homeostasis model assessment of insulin resistance. Plasma TTR concentration was elevated in women with GDM-DM compared with other groups. In contrast, adiponectin concentration was lowest in the GDM-DM group and correlated inversely with parameters of insulin resistance. Resistin concentration was higher only in the GDM-NGT and GDM-IGT groups, whereas leptin did not differ between groups. Plasma RBP4 and adiponectin concentrations were inversely correlated.
CONCLUSIONS The severity of glucose intolerance in women with pGDM is associated with high RBP4 and low adiponectin concentrations.
- 842008
제1저자 장성아 · 교신저자 김효수, 강현재
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Restoration of left ventricular synchronous contraction after acute myocardial infarction by stem cell therapy: new insights into the therapeutic implication of stem cell therapy for acute myocardial infarction.Heart. 2008;94(8):995-1001.
PubMed IF 4.4 순환기내과Abstract
OBJECTIVE To evaluate the effects of stem cell therapy on restoration of the left ventricular (LV) synchronous contraction in patients with acute myocardial infarction (AMI).
METHODS 40 patients with AMI who underwent successful coronary revascularisation were randomly allocated to the cell infusion or the control group. Evaluations were performed with echocardiographic tissue synchronisation imaging to determine LV dyssynchrony and with cardiac magnetic resonance imaging to estimate LV ejection fraction (LVEF) at baseline and at 6 months. To quantify the severity of systolic LV dyssynchrony, the standard deviations of time to peak systolic velocity of the 12 LV segments (Ts-SD) were calculated.
RESULTS At 6 months, greater improvements of Ts-SD (DeltaTs-SD: -45.0 (40.2) vs 5.0 (39.9) ms, p<0.001) and LVEF (DeltaLVEF: 6.8% (9.1%) vs -0.2% (6.9%), p = 0.015) relative to the corresponding baseline values were observed in the cell infusion group than in the control group. By multivariate analysis, DeltaTs-SD and baseline LVEF emerged as the independent determinants of LVEF improvement and cell infusion, and baseline Ts-SD as the determinant of DeltaTs-SD improvement. Maximal exercise capacity measured by symptom-limited treadmill testing correlated well with Ts-SD but not with LVEF at 6 months of follow-up.
CONCLUSION Stem cell therapy had a favourable effect on the restoration of LV synchronous contraction in patients with AMI.
- 832008
제1저자 최의근 · 교신저자 장혁재
, , , , , , , , ,
Coronary computed tomography angiography as a screening tool for the detection of occult coronary artery disease in asymptomatic individuals.J Am Coll Cardiol. 2008;52(5):357-65.
PubMed IF 22.3 순환기내과Abstract
OBJECTIVES The purpose of this study was to evaluate the prevalence of occult coronary artery disease (CAD) with coronary computed tomography angiography (CTA) to characterize plaque composition and to evaluate the potential of this new technology to impact risk stratification in asymptomatic middle-aged subjects.
BACKGROUND There is a paucity of information regarding the role of CTA for the detection of occult CAD in asymptomatic individuals.
METHODS We consecutively enrolled 1,000 middle-aged asymptomatic subjects (age 50 +/- 9 years, 63% men) who underwent CTA (64-slice multidetector row computed tomography) as part of a general health evaluation.
RESULTS Atherosclerotic plaques were identified in 215 (22%, 2 +/- 1 segments/subject) individuals; 40 individuals (4%) had only noncalcified plaques. Fifty-two (5%) subjects had significant (>or=50%) diameter stenosis and 21 (2%) had severe (>or=75%) stenosis. Thirteen (25%) and 30 (58%) subjects with significant stenosis were classified into National Cholesterol Education Program low-risk and mild coronary calcification (coronary artery calcium scores <100), respectively. Midterm follow-up (17 +/- 2 months) revealed 15 cardiac events only in those with CAD on CTA: 1 unstable angina requiring hospital stay and 14 revascularization procedures. Most (87%) events occurred within 90 days of index CTA.
CONCLUSIONS The prevalence of occult CAD in apparently healthy individuals was not negligible, although their midterm prognosis was good. CTA has a potential to provide a better insight about the occult CAD in this population. However, on the basis of our results and considering present radiation exposure data, we cannot recommend that CTA be used as a screening tool for this population at this point.
- 822008
제1저자 임수 · 교신저자 신찬수
, , , , , , , ,
Incidence of hip fractures in Korea.J Bone Miner Metab. 2008;26(4):400-5.
PubMed IF 2.9 내분비대사내과Abstract
Osteoporosis is a major public health problem in both Western and Asian populations. Because the aged population in Korea is increasing, the number of osteoporotic fractures is thought to be also increasing. However, there has been no nationwide analysis of osteoporotic fractures in Korea. We analyzed the incidence and cost of hip fracture from 2001 to 2004 by using data from the Health Insurance Review Agency, Korea. In the over 50 years age group, the number of hip fractures in women increased from 250.9/100,000 persons in 2001 to 262.8/100,000 in 2004, a 4.7% increase. However, that in men decreased from 162.8/100,000 in 2001 to 137.5/100,000 in 2004, a 15.5% decrease. Direct medical care costs of hip fracture increased from $62,707,697 in 2001 to $65,200,035 in 2004, and the proportional cost of hip fractures in the national medical costs increased by 4.5% over 4 years (from 0.200% in 2001 to 0.209% in 2004). On analysis of the population-based data obtained from the whole country from 2001 to 2004, the incidence rate of hip fractures in women, not in men, and its cost have increased in Korea. The gender distribution of hip fractures underlines the need for aggressive intervention in osteoporosis in elderly women.
- 812008
제1저자 김영선 · 교신저자 김나영
, , , , , , , , , , , , , , , , , ,
Extracolonic findings in an asymptomatic screening population undergoing intravenous contrast-enhanced computed tomography colonography.J Gastroenterol Hepatol. 2008;23(7 Pt 2):e49-57.
PubMed IF 3.5 소화기내과Abstract
BACKGROUND AND AIM The purpose of this study was to evaluate extracolonic findings that could be encountered with computed tomography colonography (CTC) using intravenous (IV) contrast material in an asymptomatic screening population.
METHODS Intravenous contrast medium-enhanced CTC was performed in 2230 asymptomatic adults (mean age, 57.5 years). Axial images were prospectively examined for extracolonic lesions. These findings were classified into three categories: potentially important findings, likely unimportant findings, and clinically unimportant findings. Potentially important extracolonic findings were defined as those which required immediate further diagnostic studies and treatment. Clinical and radiologic follow up, missed lesions and clinical outcomes were assessed using medical records (mean duration of follow up, 1.6 years).
RESULTS A total of 115 new potentially important findings in 5.2% of subjects (115/2230) were found. Subsequent medical or surgical intervention was performed in 2.0% (45/2230). New extracolonic cancer was detected in 0.5% (12/2230), and the majority of them (83.3%) were not metastasized. Computed tomography colonography missed eight potentially important extracolonic findings in eight subjects (0.4%, 8/2230): 0.8-cm early-stage prostatic cancer, six adrenal mass and one intraductal papillary mucinous tumor. There were no severe life-threatening complications related to contrast medium.
CONCLUSION Intravenous contrast-enhanced CTC could safely detect asymptomatic early-stage extracolonic malignant diseases without an unreasonable number of additional work-ups, thus reducing their morbidity or mortality.
- 802008
제1저자 오국환 · 교신저자 안규리
, , , , , , ,
Baseline peritoneal solute transport rate is not associated with markers of systemic inflammation or comorbidity in incident Korean peritoneal dialysis patients.Nephrol Dial Transplant. 2008;23(7):2356-64.
PubMed IF 8.3 신장내과Abstract
BACKGROUND It is controversial whether comorbid status or systemic inflammation has an influence on the peritoneal solute transport rate (PSTR). Our aim is to elucidate whether baseline PSTR is associated with markers of systemic inflammation or degree of comorbidity in incident peritoneal dialysis (PD) patients.
METHODS One hundred and ninety-five incident PD patients were prospectively included. Results of their baseline peritoneal equilibration test (PET) using 3.86% glucose PD fluid were analysed. Clinical and laboratory parameters of inflammation, comorbidity, nutritional status, dialysis adequacy and residual renal function (RRF) were assessed at the time of PET.
RESULTS Mean dialysate-to-plasma ratio for creatinine at 4 h (D/Pcr(4)) of our patients was 0.72 +/- 0.11. High-sensitivity C-reactive protein (hsCRP), serum interleukin-6 (IL-6) and serum albumin concentrations were closely interrelated to one another and these markers of systemic inflammation were also related to the Davies comorbidity score. No differences in age, sex ratio, body mass index, body surface area and presence of diabetes were found among four transport groups. RRF, total Kt/V, haemoglobin, nitrogen appearance and the Davies comorbidity score were not different either. High-sensitivity CRP, serum IL-6 and albumin concentrations were not associated with the baseline PSTR. By multiple linear regression analysis, only the serum albumin concentration measured at the time of PET (beta = -0.081 +/- 0.020, P < 0.001) remained significantly associated with D/Pcr(4).
CONCLUSION In our study with incident Korean PD patients, the baseline PSTR was not influenced by markers of systemic inflammation or comorbidity. For a subgroup of PD patients without serious comorbidity, other mechanisms of high baseline PSTR need to be elucidated.
- 792008
제1저자 김효수 · 교신저자 Peter Yan
, , , , , , ,
Current status of cholesterol goal attainment after statin therapy among patients with hypercholesterolemia in Asian countries and region: the Return on Expenditure Achieved for Lipid Therapy in Asia (REALITY-Asia) study.Curr Med Res Opin. 2008;24(7):1951-63.
PubMed IF 2.8 순환기내과Abstract
BACKGROUND Data on achieving National Cholesterol Education Program Adult Treatment Panel III (ATP III) goals in Asia are limited.
OBJECTIVE To examine treatment patterns, goal attainment, and factors influencing treatment among patients in 6 Asian countries who were taking statins.
METHODS A retrospective cohort study was conducted in China, Korea, Malaysia, Singapore, Taiwan, and Thailand, where 437 physicians (41% cardiologists) recruited adults with hypercholesterolemia newly initiated on statin monotherapy.
RESULTS Of 2622 patients meeting inclusion and exclusion criteria, approximately 66% had coronary heart disease (CHD)/diabetes mellitus, 24% had no CHD but > or =2 risk factors, and 10% had no CHD and <2 risk factors. Most patients ( approximately 90%) received statins at medium or lower equipotency doses. Across all cardiovascular risk categories, 48% of patients attained ATP III targets for low-density lipoprotein cholesterol (LDL-C), including 38% of those with CHD/diabetes (goal: <100 mg/dL), 62% of those without CHD but with > or =2 risk factors (goal: <130 mg/dL), and 81% of those without CHD and <2 risk factors (goal: <160 mg/dL). Most patients who achieved goals did so within the first 3 months. Increasing age (odds ratio (OR)=1.015 per 1-year increment; 95% confidence interval (CI)=1.005-1.206; p=0.0038) and initial statin potency (OR=2.253; 95% CI=1.364-3.722; p=0.0015) were directly associated with goal attainment, whereas increased cardiovascular risk (OR=0.085; 95% CI=0.053-0.134; p<0.0001 for CHD/diabetes mellitus at baseline compared with <2 risk factors,) and baseline LDL-C (OR=0.990; 95% CI=0.987-0.993); p<0.0001 per 1-mg/dL increment) were inversely associated with LDL-C goal achievement. Limitations of this study include potential differences in treatment settings and cardiovascular risk factors between different countries and centers. In addition, the effects on cholesterol goal achievement of concomitant changes in lifestyle were not assessed.
CONCLUSION LDL-C goal attainment is low in Asians, particularly those with CHD/diabetes. More effective patient monitoring, treatments, including combining regimens and dose titration, and adherence to these treatments along with therapeutic lifestyle counseling may facilitate goal attainment.
- 782008
제1저자 장성아 · 교신저자 김효수
, , , , , , , , , , , , , , , , , ,
Impact of myocardial infarct proteins and oscillating pressure on the differentiation of mesenchymal stem cells: effect of acute myocardial infarction on stem cell differentiation.Stem Cells. 2008;26(7):1901-12.
PubMed IF 4.8 순환기내과Abstract
Stem cell transplantation in acute myocardial infarction (AMI) has emerged as a promising therapeutic option. We evaluated the impact of AMI on mesenchymal stem cell (MSC) differentiation into cardiomyocyte lineage. Cord blood-derived human MSCs were exposed to in vitro conditions simulating in vivo environments of the beating heart with acute ischemia, as follows: (a) myocardial proteins or serum obtained from sham-operated rats, and (b) myocardial proteins or serum from AMI rats, with or without application of oscillating pressure. Expression of cardiac-specific markers on MSCs was greatly induced by the infarcted myocardial proteins, compared with the normal proteins. It was also induced by application of oscillating pressure to MSCs. Treatment of MSCs with infarcted myocardial proteins and oscillating pressure greatly augmented expression of cardiac-specific genes. Such expression was blocked by inhibitor of transforming growth factor beta(1) (TGF-beta(1)) or bone morphogenetic protein-2 (BMP-2). In vitro cellular and electrophysiologic experiments showed that these differentiated MSCs expressing cardiomyocyte-specific markers were able to make a coupling with cardiomyocytes but not to selfbeat. The pathophysiologic significance of in vitro results was confirmed using the rat AMI model. The protein amount of TGF-beta(1) and BMP-2 in myocardium of AMI was significantly higher than that in normal myocardium. When MSCs were transplanted to the heart and analyzed 8 weeks later, they expressed cardiomyocyte-specific markers, leading to improved cardiac function. These in vitro and in vivo results suggest that infarct-related biological and physical factors in AMI induce commitment of MSCs to cardiomyocyte-like cells through TGF-beta/BMP-2 pathways.
- 772008
제1저자 한세원 · 교신저자 김태유
, , , , , , , , , ,
Mucoepidermoid carcinoma of lung: potential target of EGFR-directed treatment.Lung Cancer. 2008;61(1):30-4.
PubMed IF 5.3 혈액종양내과Abstract
Mucoepidermoid carcinoma (MEC) of lung is a rare malignancy of lung which originates from minor salivary glands of tracheobronchial tree. EGFR targeted therapy by inhibition of EGFR activation with the specific tyrosine kinase inhibitors (TKIs) has shown meaningful anti-tumor activity in patients with EGFR TK mutation and/or amplification, or in patients with adenocarcinoma. In the present study, we find that MEC has EGFR mutation in 40% (2 out of 5) of cases, and all mutations are L858R mutation. In addition, we also observed that a MEC patient well-responded to EGFR TKI in the absence of EGFR mutation or amplification. These data indicate for the first time that MEC of lung is another potential target of EGFR inhibitor, and more extended clinical investigation is warranted.
- 762008
제1저자 이윤종 · 교신저자 송영욱
, , , , , , , ,
Matrix metalloproteinase-9 promoter polymorphisms in Korean patients with systemic lupus erythematosus.Hum Immunol. 2008;69(6):374-9.
PubMed IF 2.1 류마티스내과Abstract
To investigate the association between functional promoter polymorphisms of matrix metalloproteinase-9 (MMP-9) and systemic lupus erythematosus (SLE), we analyzed MMP-9 promoter -1562 C>T and MMP-9 -90 (CA)(n) repeat polymorphisms in 135 Korean SLE patients (mean age, 34.7 years; 124 female and 11 male) and in 135 gender- and age-matched healthy controls (mean age, 35.4 years). Clinical and laboratory findings were collected during the follow-up period (mean, 63.5 months; range, 3-252 months), and Systemic Lupus International Collaborating Clinics/American College of Rheumatology (SLICC/ACR) Damage Indexes were calculated. The levels of total MMP-9 were measured in sera of SLE patients and controls by enzyme-linked immunoabsorbent assay. The serum levels of MMP-9 in SLE patients were significantly lower than those of controls (mean +/- standard error of the mean, 1421.6+/-177.4 vs 3731.4+/-441.4 ng/ml, p=1.2 x 10(-5) by t test). Both functional polymorphisms were under the Hardy-Weinberg equilibrium state except (CA)(n) repeat polymorphisms in SLE patients (p=2.6 x 10(-5) by chi(2) goodness-of-fit test). The distribution of the MMP-9 promoter polymorphisms or haplotypes was not significantly different in SLE patients and controls. However the frequency of alleles with low numbers of CA repeats (n<21, 11.9% vs 7.0%, p=0.06 by the chi(2) test; odds ratio=1.78, 95% confidence interval=0.99-3.20) and the prevalence of low CA repeats homozygote tended to be higher in patients than in controls (5.2% vs 0.7%, p=0.07 by logistic regression, odds ratio=7.29, 95% confidence interval=0.88-60.10) in the recessive model. No relationship was found between MMP-9 polymorphisms and clinical features or damage as indicated by SLICC/ACR Damage Index in the study subjects. These results suggest that genetic polymorphisms of the MMP-9 promoter regions are not associated with the development of SLE in Korea.
- 752008
제1저자 손성욱 · 교신저자 조상헌
, , , , , , , , ,
Atopy may be an important determinant of subepithelial fibrosis in subjects with asymptomatic airway hyperresponsiveness.J Korean Med Sci. 2008;23(3):390-6.
PubMed IF 3.2 알레르기내과Abstract
The bronchial pathology of asymptomatic airway hyperreponsiveness (AHR) subjects is not well understood, and the role of atopy in the development of airway remodeling is unclear. The aim of this study was to evaluate whether atopy is associated with airway remodeling in asymptomatic AHR subjects. Five groups, i.e., atopic or non-atopic subjects with asymptomatic AHR, atopic or non-atopic healthy controls, and subjects with mild atopic asthma, were evaluated by bronchoscopic biopsy. By electron microscopy, mean reticular basement membrane (RBM) thicknesses were 4.3+/-1.7 microm, 3.4+/-1.8 microm, 2.5+/-1.5 microm, 2.6+/-1.1 microm, and 2.3+/-1.2 microm in the mild atopic asthma, atopic and non-atopic asymptomatic AHR, atopic and nonatopic control groups, respectively (p=0.002). RBM thicknesses were significantly higher in the mild atopic asthma group and in the atopic asymptomatic AHR group than in the other three groups (p=0.048). No significant difference in RBM thickness was observed between the atopic asymptomatic AHR group and the mild atopic asthma group (p>0.05), nor between non-atopic asymptomatic AHR group and the two control groups (p>0.05). By light microscopy, subepithelial layer thicknesses between the groups showed the same results. These findings suggest that RBM thickening occurs in subjects with atopic asymptomatic AHR, and that atopy plays an important role in airway remodeling.
- 742008
제1저자 박범준 · 교신저자 김윤준
, , , , , , , , , , ,
Visceral adipose tissue area is an independent risk factor for hepatic steatosis.J Gastroenterol Hepatol. 2008;23(6):900-7.
PubMed IF 3.5 소화기내과Abstract
BACKGROUND AND AIM Recent data indicate that hepatic steatosis is associated with insulin resistance, dyslipidemia and obesity (especially central body fat distribution). There have been few studies on the correlation between biopsy-proven hepatic steatosis and the above factors in a disease-free population. The aim of the present study was to evaluate the relation between hepatic steatosis assessed by biopsy and clinical characteristics including regional fat distribution measured by computed tomography (CT) in living liver donors.
METHODS Laboratory data, liver/spleen Hounsfield ratio (L/S ratio), regional fat distribution by CT and liver status by biopsy were evaluated retrospectively in a total of 177 living liver donors without a history of alcohol intake.
RESULTS The unpaired t-test showed that age, triglycerides (TG), high density lipoprotein, total cholesterol, alanine aminotransferase, body mass index, L/S ratio, visceral adipose tissue area (VAT) and subcutaneous adipose tissue area (SAT) were associated with hepatic steatosis. In the multiple logistic regression analysis, VAT (odds ratio 1.031, 95% CI 1.013-1.048, P < 0.01) and TG (odds ratio 1.012, 95% CI 1.004-1.020, P < 0.01) were independent risk factors of hepatic steatosis. Subgroup analysis also showed that VAT was an independent risk factor in men (odds ratio 1.022, 95% CI 1.003-1.041, P < 0.05) and women (odds ratio 1.086, 95% CI 1.010-1.168, P < 0.05).
CONCLUSION Our results suggest that visceral abdominal adiposity is correlated with hepatic steatosis in healthy living liver donors.
- 732008
제1저자 이세한 · 교신저자 김연수
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Genetic variations in soluble epoxide hydrolase and graft function in kidney transplantation.Transplant Proc. 2008;40(5):1353-6.
PubMed IF 0.8 신장내과Abstract
BACKGROUND Epoxyeicosatrienoic acids (EETs) are endothelium-derived hyperpolarizing factors that contribute renal protective actions. The aim of this study was to identify the association between genetic variations in soluble epoxide hydrolase (EPHX2, EET-metabolizing enzyme) and kidney allograft dysfunction.
MATERIALS AND METHODS Data from 204 kidney transplant donor-recipient pairs were examined for polymorphisms of exon 8 (R287Q, rs751141 G/A) and 3' untranslated region (3' UTR, rs1042032 A/G) of the EPHX2 gene and correlated with clinical data.
RESULTS The mean duration of follow-up for recipients was 58 +/- 45.3 months who were 39 +/- 11.8 years old at the time of operation and displayed estimated glomerular filtration rate (eGFR) of 68 +/- 16.5 mL/min/1.73 m2 at 1 month after transplantation. AA, AG, and GG genotype frequencies in 3' UTR were 28%, 55%, and 16%, respectively. Twenty-one recipients experienced allograft dysfunction with eGFR <30 mL/min/1.73 m2; 10 had AA genotype of rs1042032 polymorphism (chi-square test; A/A vs A/G+G/G; P = .04). Recipients without rs1042032 polymorphism variant allele showed a significant risk for allograft dysfunction (A/A vs A/G+G/G; P = .04; odds ratio, 2.65; 95% confidence interval [CI], 1.03-6.81). Multivariate analysis of the characteristics of patients using a Cox proportional hazard model showed that the AA genotype of rs1042032 polymorphism was predictive of allograft dysfunction (Hazard Ratio = 3.26; P = .04; 95% CI, 1.08-9.59).
CONCLUSION The present study suggested that the presence of the rs1042032 variant allele in EPHX2 was associated with a protective role for allograft function.
- 722008
제1저자 이상협 · 교신저자 류지곤
, , , , , , , ,
Polymorphisms of the MCP-1 and HSP70-2 genes in Korean patients with alcoholic chronic pancreatitis.Dig Dis Sci. 2008;53(6):1721-7.
PubMed IF 2.8 소화기내과Abstract
Alcoholic chronic pancreatitis (ACP) develops in only a small number of alcoholics. Monocyte chemotactic protein-1 (MCP-1) and heat-shock protein 70-2 (HSP70-2) polymorphisms have been reported to be associated with the severity of acute pancreatitis. However, their role in pathogenesis of ACP has not been investigated. A genetic association study for susceptibility and severity was performed on 79 male Korean ACP patients and 82 male controls. MCP-1 and HSP70-2 genotypes were determined using a fluorescence polarization detection method. The genotypes and G allele frequencies were no different in patients and controls. However, MCP-1 G allele had an effect on the development of severe ACP, when its frequency was compared in mild to moderate and severe ACP (29.6 vs. 56.0%, P = 0.02). The MCP-1 and HSP70-2 polymorphisms do not play a major role in the development of ACP in Koreans. However, MCP-1 polymorphism may be associated with the severity of ACP.
- 712008
제1저자 이경훈 · 교신저자 김동완
, , , , , , , , , , , , ,
ERCC1 expression by immunohistochemistry and EGFR mutations in resected non-small cell lung cancer.Lung Cancer. 2008;60(3):401-7.
PubMed IF 5.3 혈액종양내과Abstract
Expression of excision repair cross-complementation group 1 (ERCC1) is important for resistance to platinum agents. Mutations of epidermal growth factor receptor (EGFR) are related to the responsiveness to tyrosine kinase inhibitors in non-small cell lung cancer (NSCLC). This study was performed to determine if ERCC1 expression and EGFR are related to the prognosis of resected NSCLC, and to determine if ERCC1 expression and EGFR mutations are related. We used immunohistochemistry (IHC) to evaluate ERCC1 expression in tumors from 130 patients with curatively resected NSCLC. The median H-score was used as a cut-off for ERCC1 IHC. EGFR mutations were analyzed in exons 18, 19 and 21. ERCC1 expression was detected in tumors from 80 patients (61.5%). ERCC1 was expressed more frequently in smokers and in squamous cell carcinomas. Patients with a positive ERCC1 expression survived longer than ERCC1-negative patients (median overall survival 7.6 years for ERCC1-positive vs. 4.0 years for ERCC1-negative, P=0.046). Subsequent multivariate analysis suggested that ERCC1 expression is an independent prognostic marker of longer survival (hazard ratio: 0.598, 95% confidence interval: 0.357-1.001). EGFR mutations were found in 25 patients (19.2%) but did not affect overall survival. Interestingly, EGFR mutations were more frequent in ERCC1-negative tumors (12.5% in ERCC1-positive vs. 30% in ERCC1-negative tumors, P=0.014). In conclusion, ERCC1 expression was identified as a positive prognostic marker in resected NSCLC. In addition, EGFR mutations were more frequently found in ERCC1-negative tumors.
서울대학교병원 내과 교실이 발표한 SCI 논문입니다. 제목을 누르면 Abstract · 그림 등을, 저자 이름을 누르면 소속 · PubMed · ORCID 를 볼 수 있습니다. 굵은 이름은 동문과 연결된 저자입니다.