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Bo Youn Cho  (Cho BY) 13 Articles
Two Cases of Autoantibody Negative Fulminant Type 1 Diabetes Mellitus.
Hwa Young Cho, Young Min Cho, Myoung Hee Park, Mi Yeon Kang, Ki Hwan Kim, Yun Hyi Ku, Eun Kyung Lee, Do Joon Park, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee
Korean Diabetes J. 2007;31(4):372-376.   Published online July 1, 2007
DOI: https://doi.org/10.4093/jkda.2007.31.4.372
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Autoantibody negative fulminant type 1 diabetes mellitus is a novel subtype of type 1 diabetes, which is characterized by a remarkably abrupt onset, metabolic derangement such as diabetic ketoacidosis at diagnosis, low HbA1c level at onset and a negative islet-related autoantibodies. The prevalence of fulminant type 1 diabetes has large difference between Japan and other countries. The precise reason for this regional variation remains to be clarified. One of the possible explanations is genetic background such as genotype of class II HLA molecule. In addition, environment factors including viral infection are suggested as possible pathogenesis of the disease. Only a few cases with fulminant type 1 diabetes have been reported outside Japan, and most of these cases with definite diagnosis have been reported in Korea. We report here on two Korean patients that met the criteria for diagnosis of fulminant type 1 diabetes in accordance with their HLA genotypes.
Expression of ghrelin and its receptor according to feeding state in rats.
Min Seon Kim, Cho Ya Yoon, Young Joo Park, Hyung Kyu Park, Chen Ji Jin, Kyong Han Park, Chan Soo Shin, Kyong Soo Park, Seong Youn Kim, Bo Youn Cho, Hong Kyu Lee
Korean Diabetes J. 2002;26(3):169-178.   Published online June 1, 2002
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AbstractAbstract PDF
BACKGROUND
Ghrelin is a newly discovered gut peptide, produced mainly in the stomach, which is secreted into the circulating blood and acts on the hypothalamus and the pituitary gland. Although ghrelin was originally identified as an endogenous growth hormone secretagogue, recent studies have suggested its role is in the regulation of food intake and energy homeostasis. The aim of this study was to investigate changes in the expression of ghrelin in the stomach, and of its receptors in the hypothalamus and the pituitary gland in relation to the feeding state. METHODS: Sprague Dawley male rats, divided into 3 groups, freely fed, fasted for 48 hrs and fasted for 48 hrs followed by feeding for 24 hrs, were investigated. The stomach fundus, the hypothalamus and the pituitary glands were collected. The gastric ghrelin mRNA expression was determined by Northern blot analysis and the ghrelin protein by immunohistochemistry. The ghrelin receptor mRNA levels in the hypothalamus and anterior pituitary gland were determined by real time PCR. RESULTS: The ghrelin mRNA levels in the stomach were increased by fasting but reduced again by allowing feeding. The number of ghrelin-immunoreactive gastric epithelial cells tended to increase with fasting. Moreover, the ghrelin receptor mRNA levels increased fold in the hypothalamus, and about 3 fold in the anterior pituitary gland harvested from the rats that had fasted for 48 hrs compared to those that were freely fed. CONCLUSION: Our data demonstrate that expression of both ghrelin in stomach and its receptor in target organs increased in the fasted state, which would be helpful for magnifying the orexigenic effect of ghrelin in the negative energy balance state. Dynamic changes in ghrelin and ghrelin receptor according to altered metabolic state may suggest a physiologic role of ghrelin in the regulation of energy homeostasis.
Comparison of Clinical Characteristics of Impaired Fasting Glucose with Impaired Glucose Tolerance in Yonchon County.
In Kyong Jeong, Min Kyong Moon, Sang Wan Kim, Young Joo Park, Sun Yuk Kim, Chan Soo Shin, Do Joon Park, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Noe Kyeong Kim, Hong Kyu Lee
Korean Diabetes J. 2000;24(1):71-77.   Published online January 1, 2001
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BACKGROUND
To compare the clinical characteristics of 1997 American Diabetes Association (ADA) impaired fasting glucose (IFG) based on fasting plasma glucose (FPG) with World Health Organization (WHO) impaired glucose tolerance (IGT) based on oral glucose tolerance test (OGTT) in a Korean population. METHODS: The analyses were based on the data of 2,251 subjects aged 30-80 years obtained from the surveys of Yonchon County in Korea in 1993, and the data of 1084 subjects participated in the follow-up survey in 1995. Prevalence of glucose tolerance categories was obtained by using WHO and ADA criteria, and the level of agreement was estimated by index. Cardiovascular risk profile and the incidence of diabetes based on the ADA criteria after 2 years were compared by focusing on the discordant ctiagnostic categories namely IGT/NFS in which the subjects were diagnosed as IGT by WHO criteria but normal fasting glucose(NFG) by ADA criteria and NGT/IFG diagnosed as normal glucose tolerance(NGT) by WHO but IFG by ADA. Results The ADA criteria failed to diagnose 69% of IGT patients, that is 62% of them were considered normal and 7% as diabetes. The overall agreement was poor (x statistics = 0.32, p<0.05). Subjects classified into IGT/NFG or NGT/IFG showed the worse cardiovascular risk profile and higher incidence of diabetes than NGT/NFG. Especially, subjects with NGT/IFG exhibited higher incidence of diabetes than those with IGT/NFG. CONCLUSION: Although IFG predicts subsequent development of diabetes much better than IGT, the vast majority of the subjects with IGT will be missed according to ADA criteria based on FPG only. Consequently FPG alone could be an inadequate substitute for the OGTT.
The Characteristics of Insulin-resistance Syndrome in the Korean Population.
Jin Sung Kim, Gun Sang Park, Yun Yong Lee, Do Joon Park, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hyeon Kyu Kim, Yong Soo Park, Soon Ja Kwon
Korean Diabetes J. 1998;22(1):84-92.   Published online January 1, 2001
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AbstractAbstract PDF
BACKGROUND
Insulin-resistance syndrome or syndrome X which includes diabetes mellitus, hypertension, dyslipidemia, and obesity has been regarded as one of the mechanisms involved in the atherosclerotic disease. This study was performed to evaluate the prevalence of each camponent of insulin-resistance syndrome. We have also analyzed the clustering of insulin-resistance syndrome according to fasting insulin levels in subjects who participated in the Younchon county diabetes prevalence study in 1993. METHOD: One thousand, eight hundred and eleven subjects among 2520 subjects over 30 years-old were enrolled, We investigated the prevalence of 5 metabolic syndromes: glucose intolerance(impaired glucose tolerance and diabetes mellitus by WHO criteria), hypertension(diastolic blood pressure >95 mmHg), Hypertriglyceridemia(triglyceride >2.26 mmol/L), low HDL cholesterolemia(HDL cholesterol <0.91 mmol/ L) and obesity(body mass index >25 kg/m) according to fasting serum insulin level. RESULTS: The prevalence of glucose intolerance (diabetes mellitus and impaired glueose tolerance), hypertension, hypertriglyceridemia, low HDI, cholesterolemia and obestiy were 18.2%, 21.3%, 10.9%, 45.6% and 36.3%, respectively. According to the four quartiles(quartile 1, 2, 3, 4) of fasting serum insulin level, the prevalence rate of each metaboic syndrome was as follows: 9.5%, 15.6%, 22.8% and 25.0% for glucose intolerance; 18.7%, 17.5%, 21.1% and 27.9% for hypertension; 5.0%, 8.1%, 13 8% and 16.9% for hypertriglyceridemia; 37.9%, 46.6%, 46.5% and 51.6% for low HDL cholesterolemia; 19.2%, 30.1%, 40.8% and 55.4% for obesity. As the fasting insulin levels increase, the clustering of 2 or more disease increase. CONCLUSION: Metabolic syndromes associated with insulin-resistance are relatively common disorders in the Korean population. The prevalence and clustering of metabolic abnormalities also increase as serum insulin level increases in Korean population.
Hyperfibrinogenemia as an Important Risk Factor for Microvascular Complications in NIDDM Patients.
Suk Kyeong Kim, Hyeong Kyu Park, Sun Wook Kim, Do Joon Park, Chan Soo Shin, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee
Korean Diabetes J. 1997;21(4):406-413.   Published online January 1, 2001
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AbstractAbstract PDF
BACKGROUND
Abundant evidences have accumulated to suggest that atherosclerosis is accelerated in both type I and type Il diabetes but, traditional risk factors(hyperlipidemia, hypertension, smoking, age, obesity) do not account fully for the increased prevalence and severity of vascular diseases in diabetes. In this study, we examined the relationship of plasma fibrinogen to microvascular complications in NIDDM patients METHODS: In this cross-sectional study, 104 NIDDM patients were chosen from subjects who were attending the metabolic ward of Seoul National University Hospital. None of them were smokers, nor had any clinical evidences of acute infections, cancers or liver diseases. Arnong 104 patients, 55 patients (male 26, fernale 29) had no evidence of microvascular complications and 49(male 30, female 19) had one or moe microvascular complications. Their mean age(55.7+11.6 and 57.2+8.9 years old) and BMI (23.34+2.98 kg/m and 23.74+3.41 kg/m) were similar between two groups. This study defined microvascular complications as follows: 1) retinopathy classified based on fundoscopic and fluorescein angiographic assessmeot to background and proliferative, 2) nephropathy defined by 24 hour urine protein over 500mg, and 3) pheripheral neuropathy assessed by symptoms or NCV. RESULTS: 1) Clinically, there was no differences between two groups with respect to diastolic BP, C-peptide, HbA1c, and triglyceride level. However statistically significant differences were noted in systolic blood pressure, and total and LDL-cholesterol. Also mean fibrinogen level was more elevated significantly in diabetic patients with microvascular complications than those without microvascular complications. 2) Univariate analysis shows significant correlations between fibrinogen and the other variables such as duration of diabetes, total cholesterol level and systolic blood pressure. 3) However, fibrinogen concentration was higher in NIDDM patients with microvascuiar complications regardless of duration of diabetes, hypertension and HbA1c in multivariate logisric regression analysis (P=0.010). Conclusions: These results indicated that hyperfibrinogenemia were observed in NIDDM patient with microvascular complications regardless of duration of diabetes, systolic BP, and total cholesterol. Therefore our study suggests that hyperfibrogenemia may be one of the important missing links in the pathogenesis of diabetic microvascular diseases.
Mitochondrial DNA point mutations in Korean NIDDM patients.
Suk Kyeong Kim, Kyong Soo Park, Chan Soo Shin, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh
Korean Diabetes J. 1997;21(2):147-155.   Published online January 1, 2001
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AbstractAbstract PDF
BACKGROUND
There are a few genes with proven potential for causing some form of NIDDM, These include the insulin gene, the insulin receptor gene, a gene linked to the adenosine deaminase gene on chrornosome 20, and the glucokinase gene. Recently, an A to G transition at position 3243 in transfer ribonucleic acid ""' ' was reported in maternally inherited NIDDM patients in Japan, it was reported that approximately 1% of diabetes patients have the 3243 bp point mutation. In this study we examined the positive rate and clinical characteristics of Korean NIDDM patients with mitochondrial DNA point mutation. METHODS: We screened randomly selected 433 NIDDM patients (rnale 221, female 212) from the diabetes clinic of Seoul National University Hospital regardless of age of onset, family history of diabetes, mode of' therapy, or any other clinical characteristics. Genomic DNA was extracted from pheripheral lymphocytes. To detect the 3243 bp mutation, PCR was carried out using mtDNA primers(2928-2947, 3558-3539) and then, PCR products were electro-phoresed on a 2%: agarose gel after digestion with the restriction endonuclease Apa-I. When electrophoretic results showed two or three bands, we confirmed mtl)NA 3243 bp point rnutation by DNA sequencing. RESULTS: Of the 433 Korean NIDDM patients, 5 patiients had mtDNA point mutation digested by restriction endonuclease Apa I. Only two patients (OA6%) had heteroplasmic point mutation at nucleo-tide 3243. The remaining three patients(0.69%) with homoplasmic point mutation at nt 3426 were inciden-tally discovered during procedure in detecting 3243 bp point mutation. This 3426 point rnutation had the same adenine to guanine point mutation as 3243 point mutation digested by Apa I and therefore was confused with 3243 point mutation by RFLP method. Two patients with 3243 points mutation, aged 39 and 32 years, BMI 17.0 and 14.4(kg/m), had neither hearing impairrnent nor family history of diabetes. They required insulin for the control of their hyperglycemia and their C-peptide levels less than 1.Ong/mL showed insulin dependent tendency. On the contrary, three patients with 3426 bp point mutation, aged 71, 70, and 62 years, BMI 28.0, 23.0, and 22.6 (kg/m2 ), showed their C-peptide levels 5.4ng/mL and 3.%g/mL and insulin resistant diabetes mellitus. CONCLUSION: Two kinds of point mutation were found in the mtDNA at position nt 3243 and nt 3426, and their incidence were 0.46%(2/433) and 0.69% (3/433) respectively. 3243 point mutation was associated with insulin deficient diabetes mellitus whereas 3426 point mutation insulin resistant diabetes mellitus. 3426 point mutation has the same adenine to guanine transition as 3243 point mutation restricted by Apa I and so, DNA sequencing is warranted to differentiate with 3426 from 3243 point mutation.
Effect of cisapride on diabetic gastroparesis.
Min Seon Kim, Jae Hoon Chung, Yong Soo Park, Kyong Soo Park, Seong Yeun Kim, Myung Chul Lee, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min
Korean Diabetes J. 1993;17(4):395-402.   Published online January 1, 2001
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AbstractAbstract PDF
No abstract available.
Biological activity of in-vitro glycosylated insulin in diabetic patients.
Joong Yeol Park, Jae Joon Koh, Kyong Soo Park, Moon Kyu Lee, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min, Sung Wan Kim
Korean Diabetes J. 1993;17(3):253-258.   Published online January 1, 2001
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AbstractAbstract PDF
No abstract available.
Body weight changes of non-insulin dependent diabetic patients in korea.
Joong yeol Park, Hyeon Kyu Kim, Min Sun Kim, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min
Korean Diabetes J. 1993;17(1):51-58.   Published online January 1, 2001
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AbstractAbstract PDF
No abstract available.
Low frequencies of human cytomegalovirus(hCMV) genome in diabetic patients.
Seco In Lee, Kyung Soo Ko, Kyong Soo Park, Seong Kwan Hong, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Hoh, Hun Ki Min
Korean Diabetes J. 1993;17(1):45-50.   Published online January 1, 2001
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No abstract available.
Transplantation of microencapsulated canine pancreatic islets to streptozotocin-induced diabetic rats.
Chul Hee Kim, Joo Jun Koh, Joong Yeol Park, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min, Seung Eun Yang, Seng Jin Lee
Korean Diabetes J. 1992;16(2):129-135.   Published online January 1, 2001
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AbstractAbstract PDF
No abstract available.
The frequencies of HLA DQAI, DQBI alleles in Korean adult onset IDDM .
Sung Kwan Hong, Jong Ho Ahn, Kyung Soo Ko, Kyong Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min, Yeon Bok Jang
Korean Diabetes J. 1992;16(2):121-127.   Published online January 1, 2001
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AbstractAbstract PDF
No abstract available.
Fatty acid composition and delta 6 desaturase activities in strepto-zotocin induced diabetic rats following omega-3 fatty acid supple-mentation.
Chan Soo Shin, Eun Kyung Han, Jong Ho Ahn, Kyong Soo Park, Moon Kyu Lee, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min, Hyung Joon Yoo, Yeung Hwan Chung
Korean Diabetes J. 1992;16(2):111-119.   Published online January 1, 2001
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AbstractAbstract PDF
No abstract available.

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