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Choi YH, Penedo MCT, Daftari P, Velez IC, Hinrichs K. Accuracy of preimplantation genetic diagnosis in equine in vivo-recovered and in vitro-produced blastocysts. Reprod Fertil Dev 2015; 28:RD14419. [PMID: 25775205 DOI: 10.1071/rd14419] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 01/19/2015] [Indexed: 02/28/2024] Open
Abstract
Preimplantation genetic diagnosis has great potential in the horse, but information on evaluation of equine embryo biopsy samples is limited. Blastocysts were biopsied using a Piezo drill and methods for whole-genome amplification (WGA) investigated. Results for 33 genetic loci were then compared between biopsy samples from in vitro-produced (IVP) and in vivo-recovered (VIV) blastocysts. Under the experimental conditions described, WGA using the Qiagen Repli-g Midi kit was more accurate than that using the Illustra Genomiphi V2 kit (98.2% vs 25.8%, respectively). Using WGA with the Qiagen kit, three biopsy samples were evaluated from each of eight IVP and 19 VIV blastocysts, some produced using semen from stallions carrying the genetic mutations associated with the diseases hereditary equine regional dermal asthenia (HERDA), hyperkalemic periodic paralysis (HYPP) or polysaccharide storage myopathy 1 (PSSM1). Three of 81 biopsy samples (3.7%) returned 95% overall accuracy in IVP and VIV embryos, and this technique is suitable for use in a clinical setting.
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Park HY, Jhun BW, Jeong HJ, Chon HR, Koh WJ, Suh GY, Kim H, Chung MJ, Jun HJ, Choi YH, Lim SY. The complex association of metabolic syndrome and its components with computed tomography-determined emphysema index. Metab Syndr Relat Disord 2015; 13:132-9. [PMID: 25569241 DOI: 10.1089/met.2014.0117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Recent reports have suggested the association between emphysema and cardiovascular disease (CVD); however, there are few reports regarding association of emphysema severity with metabolic syndrome and its components representing CVD risk factors. METHODS A retrospective cross-sectional study was performed in 2814 adult male subjects over age 40 who visited the Health Promotion Center in Samsung Medical Center for a health checkup program. RESULTS We classified patients according to the quintiles of forced expiratory volume in 1 sec (FEV1) and emphysema index (EI). FEV1 percentage predicted values (% pred) was inversely associated with prevalence of metabolic syndrome and most of its components, such as abdominal obesity, hypertension, fasting hyperglycemia, and low high-density lipoprotein cholesterol. Although there was no association between prevalence of metabolic syndrome and EI, hypertension was positively associated with EI (P<0.001) and high triglycerides (TGs) were inversely associated with EI (P=0.021). These associations persisted after adjustment of other variables (P<0.001 in hypertension and P=0.039 in high TGs). CONCLUSION The computed tomography-determined EI has a complex association with components of metabolic syndrome that is associated with increased prevalence of hypertension but decreased prevalence of high TGs, whereas FEV1 (% pred) has an inverse association with metabolic syndrome and most of its components with consistent direction.
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Park BJ, Ka JN, Lee MS, Kim SA, Park MW, Choi Y, Joung D, Kwon CW, Yeom DG, Park S, Lee JW, Kim G. Physiological Effects of Walking and Viewing on Human at a Urban Arboretums. ACTA ACUST UNITED AC 2014. [DOI: 10.14578/jkfs.2014.103.4.664] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Jae SY, Kurl S, Laukkanen JA, Choi YH, Park WH, Bunsawat K, Heffernan KS, Fernhall B, Kang SM, Park JB. Usefulness of blood pressure rise prior to exercise stress testing to predict the risk of future hypertension in normotensive Korean men. Am J Cardiol 2014; 114:1238-42. [PMID: 25152425 DOI: 10.1016/j.amjcard.2014.07.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 07/16/2014] [Accepted: 07/16/2014] [Indexed: 11/24/2022]
Abstract
The aim of this study was to test the hypothesis that blood pressure (BP) increase before exercise stress testing is associated with the incidence of hypertension in a prospective study of 3,805 normotensive men without hypertension at baseline. Changes in BP were defined as the difference between seated BP at rest and BP measured immediately before exercise stress testing. Hypertension was defined as systolic and diastolic BP ≥ 140/90 mm Hg or hypertension diagnosed by a physician at the second examination. During 18,923 patient-years of follow-up, 371 new cases of hypertension developed (incidence rate 19.6 per 1,000 patient-years). Men with systolic BP changes >0 mm Hg and diastolic BP changes >7 mm Hg had 1.70 times (95% confidence interval [CI] 1.37 to 2.12) and 2.23 times (95% CI 1.76 to 2.82) increased relative risk for incident hypertension compared with men whose systolic BP changes were <0 mm Hg and diastolic BP changes were <7 mm Hg after adjustment for confounders. Men in the highest quartile of mean BP change (>10 mm Hg) had a higher incidence of hypertension (relative risk 2.98, 95% CI 2.19 to 4.06) compared with those in the lowest quartile (<0 mm Hg), and each 1 mm Hg increment in mean BP was associated with a 6% (95% CI 1.05 to 1.09) higher incidence of hypertension after adjustment for risk factors. In conclusion, BP increase before exercise stress testing is associated with incident hypertension, independent of risk factors in normotensive men. The assessment of BP immediately before exercise testing may be a useful addition to the standard exercise stress testing procedures.
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Choi YH, Seo KS. Correlation among bioimpedance analysis, sonographic and circumferential measurement in assessment of breast cancer-related arm lymphedema. Lymphology 2014; 47:123-133. [PMID: 25420305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
New approaches for assessment of lymphedema using ultrasonography (US) have been introduced recently and are reported to be reliable and simple. Ultrasonography provides detailed information about physical properties of the tissue in addition to volume and size. There have been only limited studies comparing bioimpedance analysis (BIA), US, and circumferential measurement (CM), which is considered a standard measurement. The aim of this study was to determine the relationship between US, BIA, and CM. Twenty-eight patients with lymphedema after breast cancer surgery underwent BIA, US, and CM. Impedance, which reflects the amount of extracellular fluid, was measured with 1 kHz frequency in affected and unaffected arms. Circumferences were measured at 10cm proximal and distal to the elbow and a truncated cone method used to calculate estimated volumes for upper arm and forearm. We found that interlimb forearm subcutis thickness differences measured by US were highly correlated with CM measurements and that interlimb upper arm subcutis thickness differences measured by US were moderately correlated with CM measurements and BIA ratios. However, the interlimb ratio of compressibility measured by US showed no or only weak correlation with impedance measurements and circumferential measurements. Our results also show that compressibility measured by US could not be predicted from BIA or CM measurements despite a high degree of concordance among subcutis thickness measured by US, CM, and BIA.
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Rampal S, Yang MH, Sung J, Son HJ, Choi YH, Lee JH, Kim YH, Chang DK, Rhee PL, Rhee JC, Guallar E, Cho J. Association between markers of glucose metabolism and risk of colorectal adenoma. Gastroenterology 2014; 147:78-87.e3. [PMID: 24632359 DOI: 10.1053/j.gastro.2014.03.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 02/27/2014] [Accepted: 03/05/2014] [Indexed: 01/02/2023]
Abstract
BACKGROUND & AIMS Diabetes is a risk factor for colorectal cancer. We studied the association between markers of glucose metabolism and metabolic syndrome and the presence of colorectal adenomas in a large number of asymptomatic men and women attending a health screening program in South Korea. We also investigated whether these associations depend on adenoma location. METHODS In a cross-sectional study, we measured fasting levels of glucose, insulin, hemoglobin A1c, and C-peptide and calculated homeostatic model assessment (HOMA) values (used to quantify insulin resistance) for 19,361 asymptomatic South Korean subjects who underwent colonoscopy examinations from January 2006 to June 2009. Participants completed a standardized self-administered health questionnaire and a validated semiquantitative food frequency questionnaire. Blood samples were collected on the day of the colonoscopy; fasting blood samples were also collected. Robust Poisson regression was used to model the associations of glucose markers with the prevalence of any adenoma. RESULTS Using detailed multivariable-adjusted dose-response models, the prevalence ratios (aPR, 95% confidence interval [CI]) for any adenoma, comparing the 90th with the 10th percentile, were 1.08 (1.00-1.16; P = .04) for fasting glucose, 1.07 (0.99-1.15; P = .10) for insulin, 1.09 (1.02-1.18, P = .02) for HOMA, 1.09 (1.01-1.17; P = .02) for hemoglobin A1c, and 1.14 (1.05-1.24; P = .002) for C-peptide. The corresponding ratios for nonadvanced adenomas were 1.11 (0.99-1.25; P = .08), 1.10 (0.98-1.24; P = .12), 1.15 (1.02-1.29; P = .02), 1.14 (1.01-1.28; P = .03), and 1.20 (1.05-1.37; P = .007), respectively. The corresponding ratios for advanced adenomas were 1.32 (0.94-1.84; P = .11), 1.23 (0.87-1.75; P = .24), 1.30 (0.92-1.85; P = .14), 1.13 (0.79-1.61; P = .50), and 1.67 (1.15-2.42; P = .007), respectively. Metabolic syndrome was associated with the prevalence of any adenoma (aPR, 1.18; 95% CI, 1.13-1.24; P < .001), nonadvanced adenoma (aPR, 1.30; 95% CI, 1.20-1.40; P < .001), and advanced adenoma (aPR, 1.42; 95% CI, 1.14-1.78; P = .002). Associations were similar for adenomas located in the distal versus proximal colon. CONCLUSIONS Increasing levels of glucose, HOMA values, levels of hemoglobin A1c and C-peptide, and metabolic syndrome are significantly associated with the prevalence of adenomas. Adenomas should be added to the list of consequences of altered glucose metabolism.
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Merchant AT, Shrestha D, Chaisson C, Choi YH, Hazlett LJ, Zhang J. Association between Serum Antibodies to Oral Microorganisms and Hyperglycemia in Adults. J Dent Res 2014; 93:752-9. [PMID: 24943202 DOI: 10.1177/0022034514538451] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 05/13/2014] [Indexed: 11/15/2022] Open
Abstract
We conducted a cross-sectional analysis to evaluate the relationship between serum antibody titers against 19 selected oral microorganisms and measures of hyperglycemia in a large, nationally representative data set. The study population consisted of 7,848 participants from the National Health and Nutrition Examination Survey III (1988-1994) who were at least 40 yrs old, with complete serum IgG antibody data against 19 oral microorganisms. The 19 antibody titers were grouped into 4 categories via cluster analysis--orange-red, yellow-orange, orange-blue, and red-green--named to reflect predominant antibody titers against microorganisms in Socransky's classification scheme for oral microbes. Linear regression models weighted for complex survey design were used in which fasting blood glucose, fasting insulin, and HbA1c were outcomes and antibody cluster scores were exposures, adjusting for potential confounders. Higher orange-red cluster scores were associated with increased hyperglycemia, while higher orange-blue cluster scores were related with decreased hyperglycemia. A 1-unit-higher orange-red cluster score was associated with 0.46 mg/dL higher fasting blood glucose (p = .0038), and a 1-unit-higher orange-blue cluster score was associated with 0.34% lower HbA1c (p = .0257). Groups of antibody titers against periodontal microorganisms were associated with hyperglycemia independent of known risk factors.
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Shin KE, Lee KS, Yi CA, Chung MJ, Shin MH, Choi YH. Subcentimeter lung nodules stable for 2 years at LDCT: Long-term follow-up using volumetry. Respirology 2014; 19:921-8. [DOI: 10.1111/resp.12337] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 03/20/2014] [Accepted: 04/22/2014] [Indexed: 12/21/2022]
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Shi C, Zhang C, Yang F, Park MJ, Kwak JS, Jung S, Choi YH, Wang X, Xiao M. Reducing the efficiency droop by lateral carrier confinement in InGaN/GaN quantum-well nanorods. OPTICS EXPRESS 2014; 22 Suppl 3:A790-A799. [PMID: 24922386 DOI: 10.1364/oe.22.00a790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Efficiency droop is a major obstacle facing high-power application of InGaN/GaN quantum-well (QW) light-emitting diodes (LEDs). In this paper, we report the suppression of efficiency droop induced by the process of density-activated defect recombination in nanorod structures of a-plane InGaN/GaN QWs. In the high carrier density regime, the retained emission efficiency in a dry-etched nanorod sample is observed to be over two times higher than that in its parent QW sample. We further argue that such improvement is a net effect that the lateral carrier confinement overcomes the increased surface trapping introduced during fabrication.
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Yang MH, Rampal S, Sung J, Choi YH, Son HJ, Lee JH, Kim YH, Chang DK, Rhee PL, Rhee JC, Guallar E, Cho J. The prevalence of colorectal adenomas in asymptomatic Korean men and women. Cancer Epidemiol Biomarkers Prev 2014; 23:499-507. [PMID: 24443404 DOI: 10.1158/1055-9965.epi-13-0682] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Colorectal cancer incidence is rapidly rising in many Asian countries, with rates approaching those of Western countries. This study aimed to evaluate the prevalence and trends of colorectal adenomas by age, sex, and risk strata in asymptomatic Koreans. METHODS Cross-sectional study of 19,372 consecutive participants aged 20 to 79 years undergoing screening colonoscopy at the Center for Health Promotion of the Samsung Medical Center in Korea from January 2006 to June 2009. RESULTS Among participants at average risk, those without a history of colorectal polyps or a family history of colorectal cancer, the prevalence of colorectal adenomas and advanced adenomas were 34.5% and 3.1%, respectively, in men and 20.0% and 1.6%, respectively, in women. The prevalence of adenomas increased with age in both men and women, with a more marked increase for advanced adenoma. Participants with a family history of colorectal cancer or with a history of colorectal polyps had significantly higher prevalence of adenomas compared with participants of average risk (36.9% vs. 26.9%; age- and sex-adjusted prevalence ratio = 1.16; 95% confidence interval, 1.09-1.22). The prevalence of adenomas increased annually in both men and women. CONCLUSIONS In this large study of asymptomatic Korean men and women participating in a colonoscopy screening program, the prevalence of colorectal adenomas was comparable and possibly higher than previously reported in Western countries. IMPACT Cost-effectiveness studies investigating the optimal age for starting colonoscopy screening and etiological studies to identify the reasons for the increasing trend in colorectal adenomas in Koreans are needed.
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Ku NS, Choi YH, Kim YK, Choi JP, Kim JM, Choi JY. Incidence of and risk factors for active tuberculosis in human immunodeficiency virus-infected patients in South Korea. Int J Tuberc Lung Dis 2013; 17:777-81. [PMID: 23676161 DOI: 10.5588/ijtld.12.0607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In South Korea, a high-income country with an intermediate tuberculosis (TB) burden and low human immunodeficiency virus (HIV) prevalence, studies on incidence and risk factors of TB in HIV-infected persons have rarely been reported. OBJECTIVE To investigate the incidence of and risk factors for active TB in HIV-infected persons in South Korea. METHODS A retrospective analysis was conducted of 1265 HIV-1 infected patients who visited four hospitals in South Korea between 1985 and 2012. We analysed the incidence of TB during the follow-up period. To investigate risk factors associated with active TB, we conducted a 1:2 matched case-control study of HIV-infected patients with newly active TB and controls without active TB who had similar CD4(+) T-cell counts and dates of first visit. RESULTS Over a total of 4457 person-years (py), 185 (14.6%) subjects were diagnosed with active TB; the incidence was 4.2 cases/100 py. In multivariate analysis, low body mass index (P = 0.033) and current smoking (P = 0.003) were independent risk factors for TB in HIV-infected patients. CONCLUSION Further strategies on prevention and treatment of active TB among HIV-infected patients should be implemented in South Korea. Encouraging smoking cessation and supporting good nutrition may be ways to reduce the incidence of active TB in HIV-infected patients.
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Kim BK, Choi YH, Song YM, Park JH, Noh HM, Nguyen TL, Hopper JL. Bone mineral density and the risk of breast cancer: a case-control study of Korean women. Ann Epidemiol 2013; 24:222-7. [PMID: 24360852 DOI: 10.1016/j.annepidem.2013.11.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 11/16/2013] [Accepted: 11/18/2013] [Indexed: 10/26/2022]
Abstract
PURPOSE Bone mineral density (BMD) may be useful as a surrogate marker reflecting lifetime exposure to estrogen in a woman. Our study aimed to investigate an association between BMD and breast cancer risk. METHODS A case-control study was conducted using 253 breast cancer cases and 506 age and menopausal status-matched controls from the same institution. Cases were ascertained through medical record review of the women with abnormal mammographic findings. BMD was measured at the lumbar spine and femoral neck using a dual-energy X-ray absorptiometry. The association was estimated by conditional logistic regression analysis with an adjustment for covariates. RESULTS Although there was no difference in the association between pre- and postmenopausal disease, the association between BMD and breast cancer was evident for postmenopausal breast cancer. One standard deviation in age and menopausal status adjusted BMD at lumbar spine and femur neck was associated with 1.35-fold (standard error = 0.19, P = .04) and 1.34-fold (standard error = 0.20, P = .05) increased likelihood of breast cancer risk, respectively, for postmenopausal women. CONCLUSION After adjusting for covariates, higher BMD at lumbar spine and femur neck are associated with increased likelihood of breast cancer risk for postmenopausal women. These findings suggest that BMD could be included in breast cancer risk prediction models for postmenopausal Korean women.
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Jae SY, Heffernan KS, Kim DK, Park WH, Choi YH, Kim SH. Cardiorespiratory fitness and incident metabolic syndrome in middle-aged Korean men. Ann Hum Biol 2013; 41:477-80. [PMID: 24180292 DOI: 10.3109/03014460.2013.849756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study investigated the relationship of cardiorespiratory fitness (CRF) with incident metabolic syndrome in 810 middle aged Korean men. All subjects were free of metabolic syndrome at baseline examination. The metabolic syndrome was defined by NCEP criteria and CRF was directly measured by peak oxygen uptake during a treadmill test. During an average of 3.3 years of follow-up, 155 (19.1%) men developed the metabolic syndrome. The incidence of metabolic syndrome was inversely associated with CRF quartiles (p < 0.05). The relative risk (RR) of incident metabolic syndrome in the lowest CRF quartile vs the highest CRF quartile was 1.67 (95% CI = 1.07-2.60) after adjustment for covariates. Each metabolic equivalent (MET) increment in peak oxygen consumption was associated with a 17% (RR = 0.83, 95% CI = 0.73-0.94) lower incidence of metabolic syndrome. These results demonstrate that cardiorespiratory fitness was associated with the incidence of metabolic syndrome independent of covariates in middle aged Korean men.
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Bian LQ, Li RZ, Zhang ZY, Jin YJ, Kang HW, Fang ZZ, Park YS, Choi YH. Effects of total bilirubin on the prevalence of osteoporosis in postmenopausal women without potential liver disease. J Bone Miner Metab 2013; 31:637-43. [PMID: 23579311 DOI: 10.1007/s00774-013-0452-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Accepted: 03/07/2013] [Indexed: 12/26/2022]
Abstract
It is still uncertain whether total bilirubin per se is a risk factor for osteoporosis in postmenopausal women and no study has so far examined this important issue. This study was designed to assess the sheer effects of total bilirubin on the prevalence of osteoporosis in postmenopausal women without potential liver disease. In the present study, postmenopausal female subjects without potential liver disease (n = 918) who underwent measurement of bone mineral density were enrolled. Correlation and logistic regression analysis were used to assess the relationship between total bilirubin and other variables. As a result, subjects with osteoporosis had a significantly lower total bilirubin level (P = 0.005). A 0.1 mg/dl increase in total bilirubin was associated with reduced odds ratio of the risk by 38 % for osteoporosis [OR 0.62 (95 % CI 0.52-0.88), P = 0.012] after adjustment for several variables. Total bilirubin was independently associated with BMD [coefficient = 0.41, 95 % CI (0.35-0.47), P < 0.001 for lumbar spine and coefficient = 0.44, 95 % CI (0.36-0.48), P < 0.001 for femur neck]. A positive correlation could be observed with significant difference between total bilirubin and z-score (r = 0.33, P < 0.001 for lumbar spine and r = 0.37, P < 0.001 for femur neck) and total bilirubin was positively correlated with serum calcium (r = 0.13, P < 0.001) as well. Therefore, this study demonstrates an independent inverse association between total bilirubin and the prevalence of osteoporosis in postmenopausal women without potential liver disease. Total bilirubin would be useful as a provisional new risk factor of osteoporosis in such a population.
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Yang MH, Cho J, Choi YH, Son HJ, Rhee JC, Sung J. The association between coronary artery calcification and colorectal adenoma. HEPATO-GASTROENTEROLOGY 2013; 60:538-42. [PMID: 23108081 DOI: 10.5754/hge12709] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND/AIMS Both colorectal neoplasm and coronary artery disease are prevalent diseases worldwide and share several risk factors. The aim of this study was to investigate the association between coronary artery calcification and prevalence of colorectal adenoma. METHODOLOGY We retrospectively evaluated 3,092 subjects who underwent colonoscopy and coronary artery calcium computed tomography (CT) on the same day or within a 3-month interval, during routine check-ups between January 2006 and June 2009 at the Center for Health Promotion of the Samsung Medical Center. Multivariate logistic regression analysis was used to calculate adjusted odds ratios (ORs). RESULTS Colorectal adenomas were detected in 1,067 (34.5%) of the 3,092 subjects, including 536 (41.0%) individuals with and 531 (29.7%) without coronary calcification (p<0.001). Multiple logistic regression analysis showed that the presence of coronary artery calcification (OR=1.346; 95% confidence interval [CI]=1.122-1.614), age ≥50 years (OR=1.516; 95% CI=1.256-1.829), waist circumference of 90-99cm (OR=1.364; 95% CI=1.008-1.844) and current smoker (OR=1.266; 95% CI=1.045-1.534) were associated with the prevalence of colorectal adenoma. CONCLUSIONS The prevalence of colorectal adenoma is significantly higher in patients with coronary artery calcification. Our results support positive relationship between coronary artery disease and colorectal adenoma.
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Kim AD, Kang KA, Kim HS, Kim DH, Choi YH, Lee SJ, Kim HS, Hyun JW. A ginseng metabolite, compound K, induces autophagy and apoptosis via generation of reactive oxygen species and activation of JNK in human colon cancer cells. Cell Death Dis 2013; 4:e750. [PMID: 23907464 PMCID: PMC3763435 DOI: 10.1038/cddis.2013.273] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/26/2013] [Accepted: 06/19/2013] [Indexed: 02/05/2023]
Abstract
Compound K (20-O-(β-D-glucopyranosyl)-20(S)-protopanaxadiol) is an active metabolite of ginsenosides and induces apoptosis in various types of cancer cells. This study investigated the role of autophagy in compound K-induced cell death of human HCT-116 colon cancer cells. Compound K activated an autophagy pathway characterized by the accumulation of vesicles, the increased positive acridine orange-stained cells, the accumulation of LC3-II, and the elevation of autophagic flux. Whereas blockade of compound K-induced autophagy by 3-methyladenein and bafilomycin A1 significantly increased cell viability. In addition, compound K augmented the time-dependent expression of the autophagy-related proteins Atg5, Atg6, and Atg7. However, knockdown of Atg5, Atg6, and Atg7 markedly inhibited the detrimental impact of compound K on LC3-II accumulation and cell vitality. Compound K-provoked autophagy was also linked to the generation of intracellular reactive oxygen species (ROS); both of these processes were mitigated by the pre-treatment of cells with the antioxidant N-acetylcysteine. Moreover, compound K activated the c-Jun NH2-terminal kinase (JNK) signaling pathway, whereas downregulation of JNK by its specific inhibitor SP600125 or by small interfering RNA against JNK attenuated autophagy-mediated cell death in response to compound K. Compound K also provoked apoptosis, as evidenced by an increased number of apoptotic bodies and sub-G1 hypodiploid cells, enhanced activation of caspase-3 and caspase-9, and modulation of Bcl-2 and Bcl-2-associated X protein expression. Notably, compound K-stimulated autophagy as well as apoptosis was induced by disrupting the interaction between Atg6 and Bcl-2. Taken together, these results indicate that the induction of autophagy and apoptosis by compound K is mediated through ROS generation and JNK activation in human colon cancer cells.
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Choe PG, Shin HY, Shin MJ, Song KH, Kim ES, Jin HY, Choi YH, Choi OJ, Park KH, Park NJ, Kim KH, Han SH, Choo EJ, Kim HB. P003: Current status of infection control practice for prevent of central venous catheter-associated bloodstream infection in Korea. Antimicrob Resist Infect Control 2013. [PMCID: PMC3688028 DOI: 10.1186/2047-2994-2-s1-p3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Lee JY, Choi JY, Choi YH, Hyun SH, Moon SH, Jang SJ, Choe YS, Lee KH, Kim BT. Diffuse thyroid uptake incidentally found on 18F-fluorodeoxyglucose positron emission tomography in subjects without cancer history. Korean J Radiol 2013; 14:501-9. [PMID: 23690721 PMCID: PMC3655308 DOI: 10.3348/kjr.2013.14.3.501] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Accepted: 12/26/2012] [Indexed: 11/16/2022] Open
Abstract
Objective We investigated the clinical significance of incidental diffuse thyroid uptake (DTU) on 18F-FDG PET in subjects without a history of cancer. Materials and Methods This study included 2062 studies from adults who underwent 18F-FDG PET as a cancer screening program. Subjects were divided into the following two groups: with (group I) or without (group II) DTU. The presence of DTU and the thyroid visual grading score were compared with thyroid function tests, serum anti-microsomal antibody (AMA) levels, and the presence of diffuse parenchymal change (DPC) on ultrasonography (USG). Results DTU was found in 6.6% of the scans (137/2062). Serum thyroid stimulating hormone (TSH) and AMA levels were significantly higher in group I than in group II. Increased AMA level (55.1%) and DPC (48.7%) were more frequently found in group I (p < 0.001). The proportion of subjects with any abnormal results in serum free thyroxine, triiodothyronine, TSH, or AMA levels or DPC on USG was significantly higher in group I than in group II (71.5% vs. 10.6%, p < 0.001), and was significantly and gradually increased according to the visual grading score group (0 vs. 1-2 vs. 3-4 = 10.6% vs. 58.5% vs. 90.9%, p < 0.001). TSH and is AMA levels were significantly increased according to the visual grading score. Conclusion The presence or degree of incidental DTU on 18F-FDG PET is closely correlated with increased serum AMA and TSH levels, and the presence of DPC on USG. Therefore, the most plausible pathological cause of DTU may be cell damage by an autoimmune mechanism.
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Yang MH, Rampal S, Sung J, Choi YH, Son HJ, Lee JH, Kim YH, Chang DK, Rhee PL, Kim JJ, Rhee JC, Chun HK, Guallar E, Cho J. The association of serum lipids with colorectal adenomas. Am J Gastroenterol 2013; 108:833-41. [PMID: 23545715 DOI: 10.1038/ajg.2013.64] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES There is suggestive but sparse evidence that dyslipidemia is associated with colorectal neoplasms. We investigated the association of serum lipid and apolipoprotein concentrations with the prevalence of colorectal adenomas. METHODS Cross-sectional study of 19,281 consecutive participants aged 40-79 years undergoing screening colonoscopy at the Center for Health Promotion of the Samsung Medical Center in Korea from January 2006 to June 2009. RESULTS We identified 5,958 participants with colorectal adenomas (30.9%), including 5,504 (28.5%) with non-advanced adenomas and 454 (2.4%) with advanced adenomas. The adjusted relative prevalence ratios (aRPRs) comparing the fourth with the first quartiles of serum triglycerides were 1.35 (95% confidence interval (CI) 1.20-1.52; P trend<0.001) for non-advanced adenomas and 1.45 (95% CI 1.02-2.06; P trend=0.005) for advanced adenomas. Higher levels of high-density lipoprotein (HDL) cholesterol and apolipoprotein A-1 (ApoA-1) were significantly associated with 12% (Q4 vs. Q1 aRPR 1.12; 95% CI 1.00-1.26; P trend=0.049) and 17% (Q4 vs. Q1 aRPR 1.17; 95% CI 1.04-1.31; P trend=0.004) higher prevalence of non-advanced adenoma. There was also a non-significant association between higher levels of low-density lipoprotein (LDL) cholesterol (Q4 vs. Q1 aRPR 1.22; 95% CI 0.91-1.66; P trend= 0.12) and apolipoprotein B (ApoB) (Q4 vs. Q1 aRPR 1.32; 95% CI 0.94-1.83; P trend=0.07) with higher prevalence of advanced adenoma. There was no association between total cholesterol levels with colorectal adenoma. CONCLUSIONS In this large cross-sectional study, higher levels of serum triglycerides were significantly associated with an increasing prevalence of both non-advanced and advanced colorectal adenomas, while higher levels of ApoA-1 and HDL cholesterol were significantly associated with an increasing prevalence of non-advanced adenomas.
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95
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Bian LQ, Zhang ZY, Kim SJ, Zhou CC, Choi YH. Gamma glutamyltransferase as a novel marker of coronary artery calcification in women. J Cardiovasc Med (Hagerstown) 2013; 13:684-90. [PMID: 22801074 DOI: 10.2459/jcm.0b013e328356a432] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AIMS Gamma glutamyltransferase (GGT) has attracted great interest as a potential novel marker of cardiovascular risk. However, its association with coronary artery calcification (CAC) score-determined coronary artery atherosclerosis is unknown. This study was designed to assess the association of GGT with CAC score. METHODS Participants, 311 asymptomatic men and 220 asymptomatic women who underwent evaluation of CAC by cardiac computed tomography, were retrospectively investigated. Correlation and logistic regression analysis were used to assess the association of GGT with CAC score and other variables. RESULTS Women but not men with higher GGT had a higher incidence of CAC score above 100 and a higher prevalence of metabolic syndrome (P = 0.012 and 0.007, respectively). GGT was positively correlated with C-reactive protein (CRP) in women (r = 0.336, P < 0.001). GGT was independently associated with the incidence of CAC score above 100 in women [odds ratio (OR) 1.228, 95% confidence interval (CI) 1.206-1.252, P = 0.001] but not in men. CONCLUSION In asymptomatic women, GGT is independently and positively associated with CAC score and it can be useful as a provisional new risk factor for CAC. Additionally, metabolic syndrome and CRP may be the mediators of the mechanisms by which GGT increases CAC in asymptomatic women.
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Jayasooriya RGPT, Jang YJ, Kang CH, Dilshara MG, Moon DO, Nam TJ, Choi YH, Kim GY. Inhibition of Nitric Oxide and Prostaglandin E<sub>2</sub> Expression by Methanol Extract of <i>Polyopes affinis</i> in Lipopolysaccharide-stimulated BV2 Microglial Cells through Suppression of Akt-dependent NF-kB Activity and MAPK Pathway. TROP J PHARM RES 2013. [DOI: 10.4314/tjpr.v12i1.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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97
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Jayasooriya RGPT, Kang CH, Jang YJ, Kang SH, Dilshara MG, Choi YH, Moon DO, Kim GY. Methanol Extract of <i>Myelophycus caespitosus</i> Inhibits the Inflammatory Response in Lipopolysaccharidestimulated BV2 Microglial Cells by Downregulating NF-kB via Inhibition of the Akt Signaling Pathway. TROP J PHARM RES 2013. [DOI: 10.4314/tjpr.v11i6.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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98
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Roy R, Kukucka M, Brodarac A, Choi YH, Kurtz A, Hetzer R, Aberman Z, Stamm C. Placenta-derived mesenchymal stromal cells: In vitro and in vivo evaluation for cardiac cell therapy. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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99
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Brodarac A, Oberwallner B, Choi YH, Hescheler J, Saric T, Stamm C. Inhibition of hypoxia-induced apoptosis in induced pluripotent stem cell derived cardiomyocytes. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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100
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Deppe AC, Liakopoulos OJ, Hoffmann I, Blettner M, Kuhn E, Choi YH, Weigang E, Wahlers T. Acute aortic dissection type A: Epidemiology and consequences of time delay between onset of symptoms and surgery – a GERAADA analysis. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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