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NIDDM 환자에서 혈당조절 전후의 Nitrogen Balance 와 IGF - I 변화에 관한 연구
최웅환(Woong Hwan Choi),박원근(Won Kun Park),신현호(Hyun Ho Shin),한인권(In Kwon Han),김은주,김선우(Sun Woo Kim),최영길(Young Kil Choi) 대한내과학회 1987 대한내과학회지 Vol.34 No.1
N/A We studied the effect of blood sugar control in patients with NIDDM on the IGF-I level and nitrogen balance as a metabolic index. The result as follows 1) There was no difference in IGF-I level between patients with NIDDM and normal control group. (222±60ng/ml vs 221±49ng/ml, p>0.1) 2) There was a statistically significant increment in IGF-I level in the NIDDM patients who improved to positive nitrogen balance from negative nitrogen balance. (217±55ng/ml vs 285±44ng/ml, p<0.05) 3) IGF-I level was not increased in patients who did not improve to positive nitrogen balance after suger control and the patient who was prositive nitrogen blance initially. (231±63ng/m1 vs 190±52ng/ml, p>0.1) 4) IGF-I level was not increased in spite of improved nitrogen balance after sugar control in patients with under body weight. (221±68ng/ml vs 213±42ng/ml, p>0.1) These reult sugested that mornitoring of serum IGF-I level in NIDDM patients is useful marker which represent metabolic compensation with treatment of diabetes.
PCR 을 이용한 인슐린 수용체 β - 소단위의 DNA 측정에 관한 연구
최웅환(Woong Hwan Choi),유계수(Ge Soo Yoo),고근아(Keun Ah Koh),정형진(Hyung Jin Chung),김해엽(Hae Youp Kim),신현호(Hyun Ho Shin),한인권(In Kwon Han),문인걸(In Gul Moon) 대한내과학회 1991 대한내과학회지 Vol.40 No.6
Insulin resistance is one of the most important mechanisms of type II diabetes, which may result from acquired or genetic abnormalities in the pathway of insulin action. As the develoment of cloning method of human insulin receptor precursor cDNA, it has become possible to investigate the insulin receptor at the genetic level. We used the modified PCR technique method that permitted us to employ small amounts of cellular RNA as the initial template to amplify the region that encodes the intracellar β-subunit of the human insulin receptor and C-terminal region of β-subunit. We think that this PCR method will facilitate a definite determination to what degree insulin resistance can be ascribed to genetic alterations in the structure of the insulin receptor molecule in type II diabetes.
Type 2 DM 환자에서 적혈구를 이용한 인슐린 내재화율과 Degradation Products 에 관한 연구
최웅환(Woong Hwan Choi),박원근(Won Kun Park),한인권(In Kwon Han),김선우(Sun Woo Kim),정운원(Woon Won Jung),문인걸(In Gul Moon) 대한내과학회 1988 대한내과학회지 Vol.34 No.3
N/A We studied insulin internalization and degradation at 37℃ in human erythrocytes from patients with type II DM and normal subjects. The internalization of 125I-Insulin in human erythrocytes was studied by using an acid extraction technique (pH 5.7, PBS) from 54 patients with type II DM and 14 normal subjects. Insulin degradation products was assayed with using Sephadex G-50 column, HPLC with radioisotope detector from 4 patients with type II DM and 14 normal subjects. The maximal rate of insulin internalization (Incubation time: 4hours, at 37℃) was decreased in patients with type II DM [51.40±14.67% (±SD) VS 80.23±7.73 % (±SD). P<0.001]. The maximal degradation products of insulin (Incubation time: 4hours, at 37℃) was decreased in patients with type II DM [62.50±10.50% (±SD) VS 87.75±6.66% (SD). p<0.001]. In conclusion, insulin internalization and degradation in human eryhrocytes from patients with type II DM are significantly reduced. These defect may be related to the cellular insulin resistance present in these patients.
정상 임신후반기 IGF - I / SMC 와 신생아 성장에 관한 연구
최웅환(Woong Hwan Choi),박원근(Won Kun Park),신현호(Hyun Ho Shin),한인권(In Kwon Han),김선우(Sun Woo Kim),최영길(Young Kil Choi) 대한내과학회 1988 대한내과학회지 Vol.34 No.2
N/A The polypeptide hormones of the somatemedin (SM) family have been proposed to promote growth both in pre and postnatally. The two main farm of samatomedin in serum of adults are insulin-like growth factor 1, also termed SMC and IGF-II. IGF-I activity raises in the late pegnancy, which suggest a potential effect on fetal development. The aim of the present study was to determine maternal IGF-I and placenta IGF-I levels in 12 womens with late pregnancy end evaluate the relationship of these level to the growth percentile of their infant. The result were as follow: 1) plasma levels of IGF-I/SMC in late pregnancy were signficantly higher than age mached control. (337±127ng/ml VS 232±15ng/ml, p<0.005). 2) The maternal levels of IGF-I/SMC (337±127ng/ml) were significantly greater than those in the paired newborn cord artery (84±40ng/ml) or cord vein (100±46ng/ml). 3) The maternal levels of IGF-I/SMC were not correlated with cord vein IGF-I/SMC r=18 and cord artery IGF-I/SMC r=0.16 (p>0.05). 4) The cord vein IGF-I/SMC levels were positively correlated with cord artery IGF-I/SMC levels r=0.76 (p<0.005). 5) There was an increase in the percentile of birth weight and length with increasing maternal serum 1GF-1/SMC levels. The corresponding correlation coefficients in weight and length percentile with maternal serum IGF-l/SMC were 0.44 (p<0.005) and 0.65 (p<0.005), respectively. These result suggest that increased IGF-I/SMC levels in late pregnancy may causally be related to intrauterine fetal growth.
홍상모 ( Sang Mo Hong ),최웅환 ( Woong Hwan Choi ) 대한내과학회 2012 대한내과학회지 Vol.83 No.4
Sarcopenia is defined the loss of muscle mass and strength with aging. Although the etiology and the pathogenesis, the diagnosis of sarcopenia are obscure, the sequel of sarcopenia, i.e. morbidity and mortality, metabolic complications, are a major public health problem. Particularly, aged people in Korea are increasing rapidly more than expected; therefore the interest of sarcopenia is also increasing rapidly. This article provides an overview of the pathogenesis, and diagnosis, epidemiology, clinical results. (Korean J Med 2012;83:444-454)
인슐린 농도 변화에 따른 인슐린 내재화 ( Internalization ) 와 Degradation 의 변화
박원근(Won Kun Park),최웅환(Woong Hwan Choi),한인권(In Kwon Han),김선우(Sun Woo Kim),정운원(Woon Won Jung),문인걸(In Gul Moon) 대한내과학회 1988 대한내과학회지 Vol.34 No.4
N/A This study was conducted to investigate the effect of ambient concentration of insulin on insulin internalization and degradation in human erythrocytes. The absolute amount of internalized insulin was quantitated by multiplying the concentration of insulin by the percent specifically bound and internalized (by acid extraction method, PBS, pH 5.7) at the various insulin concentration (1.4, 2.5, 12.4, 112.4 ng/m1). The insulin degradation products (IDP) was assayed by using Sephadex G-50 column, HPLC with radioisotope detector in human erythrocytes which were incubated (37℃) at the various insulin concentration (1.43, 2.76, 14.76, 26.60ng/ml). Insulin internalization (ng/ml) increased in human erythrocytes with increasing concentration of insulin (3hr incubation time, 0.336 at 1.4, 0.275, at 2,5, 3.844 at 12.4, and 24.728ng/ml at 112.4ng/ml, 4hr incubation time, 0. 476, at 1.4, 0.925 at 2.5, 4.712 at 12.4 and 38.216ng/ml at 112.4ng/ml). Insulin degradation products (%) increased (2hr incubation time, 20.9 at 1,43; 38.0 at 2.76 and 38.0% at 14.76ng/ml) but no more than at a level of insulin concentration (2.76ng/ml) in normal human erythrocytes. In diabetic human erythrocytes, insulin degradation products (%) also increased (3br incubation time, 14.1 at 1.43, 19.0 at 2,76, 23.0 at 14.76, and 23.2% at 26.60ng/ml, 4hr incubation time, 39.4 at 1.43, 46.9 at ~2.76, 52. S at 14.76 and 53.0% at 26.60ng/ml) but no more than at a level of insulin concentration (14.76ng/ml), This result indicated that the ambient concentration of insulin may play an important role in the regulation of intracellular processing of insulin.
Type 2 DM 환자에서 인슐린 또는 경구혈당강하제등의 치료에 의한 인슐린 내지환와 Dagradation 장애의 회복
박원근(Won Kun Park),고완(Wang Ko),최웅환(Woong Hwan Choi),한인권(In Kwon Han),김선우(Sun Woo Kim),정운원(Woon Won Jeng),문인걸(In Gul Moon) 대한내과학회 1988 대한내과학회지 Vol.35 No.4
N/A The internalization of I-insulin in human erythrocytes was studied using an acid extraction technique (pH 5.7, PBS) from 7 patients with type 11 diabetes mellitus (DM) and 14 normal subjects before and after glucose control. Insulin degradation products from 4 patients with type 11 DM and 14 normal subjects in the same period were assayed using HPLC with Sephadex G-50 column and a radioisotope detector. The maximal rates of insulin internalization (Incubation time: 4 hours, at 37°C) which were decreased before glucose control (50.25±6.99%vs 80.23±7.73%), returned toward normal levels after glucose control (89.5±5.45%). The maximal degradation products of insulin (incubation time: 4 hours, at 37°C) which were decreased before glucose control (62.25±10.50vs 87.75±6.66%), returned toward normal levels after glucose control (91.4±7.60%). These results suggest that in type 11 DM, the decreased rate of insulin internalization and degradation may be one of the contributory factors in the pathogenesis of postbinding resistance, which is reversible with insulin or sulfonylurea treatment.
제2형 당뇨병 환자에서의 당뇨병성 망막증과 대혈관 합병증과의 관계
홍상모 ( Sang Mo Hong ),박정환 ( Jung hwan Park ),임영효 ( Young Hyo Lim ),박용수 ( Yong Soo Park ),김동선 ( Dong Sun Kim ),최웅환 ( Woong Hwan Choi ),안유헌 ( You Hern Ahn ) 대한내과학회 2011 대한내과학회지 Vol.81 No.3
Background/Aims: Type 2 diabetes with microvascular complications is often accompanied by macrovascular complications. However, the relationship between the two complications is unclear. In this study, we determined the relationship between diabetic retinopathy and morphological changes of the carotid artery. Methods: We analyzed the presence of plaque and mean carotid intima-media thickness (CIMT) in patients with type 2 diabetes (n = 133) using high-resolution ultrasound. The presence and severity of retinopathy were graded according to fundus photographs. Results: The mean CIMT of the diabetic retinopathy (DR) group (0.111 ± 0.048 cm) was significantly greater than that of the nondiabetic retinopathy (No DR) group (0.074 ± 0.039 cm, p = 0.007). An abnormal mean CIMT (> 0.08 cm) was more frequently observed in the DR group (76%) than that in the No DR group (23.1%; odds ratio, 10.609; 95% confidence interval, 3.072-36.639; adjusted by age, body mass index, hypertension, and diabetes duration). Although the mean CIMT in patients with plaque was significantly greater than that of patients without plaque, no significant difference was observed between the DR (36%, 17 patients) and NoDR (18.5%, 20 patients) groups in the presence of plaque. Conclusions: Diabetic retinopathy was associated with an increased CIMT but not with atherosclerotic plaques. However, the increases in IMT were associated with the presence of plaques, which predispose patients to cardiovascular disease. These results imply that the microvascular complications of diabetes have indirect relationships with the cardiovascular complications of diabetes. (Korean J Med 2011;81:351-358)