Diabetes & Metabolism Journal

Ki Ok Han (Han KO)

6 Articles

Mutation Screening of HNF-1alpha Gene in Korean Women with Gestational Diabetes Mellitus.: Hun Sung Kim, Sun Hee Hwang, Eun Sun Choi, So Young Park, Chang Hoon Yim, Ki Ok Han, Hyun Koo Yoon, Ho Yeon Chung, Kyung Seon Kim, Jeong Bok, Jong Young Lee, Sung Hoon Kim; Korean Diabetes J. 2008;32(1):38-43. Published online February 1, 2008; DOI: https://doi.org/10.4093/kdj.2008.32.1.38

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BACKGROUND
S: Gestational diabetes mellitus (GDM) is defined as glucose intolerance with onset or first detection during pregnancy and mostly caused by insulin resistance and beta-cell dysfunction like type 2 diabetes. However, autoimmune or monogenic diabetes can contribute to GDM. Maturity-onset diabetes of the young (MODY) is a monogenic form of diabetes characterized by an early age of onset and an autosomal dominant pattern of inheritance. Most MODY cases are attributable to mutations in HNF-1alpha gene, also known as MODY3. We investigated whether mutations in HNF-1alpha gene are present in Korean women with GDM. METHODS: A total of 96 Korean women with GDM who have a family history of DM were screened for mutations in the HNF-1alpha gene. We evaluated the clinical characteristics of GDM women with HNF-1alpha gene mutations. RESULTS: Five of 96 patients (5.2%) were found to have a mutation in HNF-1alpha gene. Four of those (-23C > G, 833G > A (Arg278Gln), 923C > T, IVS5 + 106A > G) were novel and one (-124G > C) in promoter region was reported in previous study. The mean age of GDM women with mutations of HNF-1alpha gene was 34 years. Four women with MODY3 gene mutations required insulin therapy during pregnancy. GDM women with MODY3 gene mutations appeared to be decreased insulin secretion (HOMA-%B) than those without mutations. CONCLUSIONS: We have found the existence of MODY3 as well as novel HNF-1alpha gene mutations in Korean women with GDM.

Citations

Citations to this article as recorded by

Update on Monogenic Diabetes in Korea
Ye Seul Yang, Soo Heon Kwak, Kyong Soo Park
Diabetes & Metabolism Journal.2020; 44(5): 627. CrossRef
Maturity-Onset Diabetes of the Young: What Do Clinicians Need to Know?
Sung-Hoon Kim
Diabetes & Metabolism Journal.2015; 39(6): 468. CrossRef

Clinical Courses of Two Women with Gestational Diabetes Mellitus Who are GAD Antibody Positive.: Sung Hoon Yu, Min Jun Song, Sung Hoon Kim, Chang Hoon Yim, Ki Ok Han, Won Kun Park, Hyun Koo Yoon, Ho Yeon Chung; Korean Diabetes J. 2006;30(5):398-402. Published online September 1, 2006; DOI: https://doi.org/10.4093/jkda.2006.30.5.398

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Abstract PDF: Gestational diabetes mellitus (GDM) is defined as glucose intolerance of various degrees with onset or first recognition during pregnancy. Women with GDM are at high risk of developing type 2 diabetes later in life, but the risk of developing type 1 diabetes is also increased. Positivity for glutamic acid decarboxylase (GAD) antibodies during pregnancy confers a high risk for subsequent progression to type 1 diabetes. Here, we reported the two cases with GDM who were GAD antibody positive and progressed to type 1 diabetes with different time-courses. One woman with GDM progressed rapidly to classical type 1 diabetes while the other became slowly progressive IDDM (SPIDDM) [or latent autoimmune diabetes in adults (LADA)].

Effect of Self-monitoring of Blood Glucose on Pregnancy Outcome in Women with Mild Gestational Diabetes.: Hak Chul Jang, Jeong Eun Park, Chang Hoon Yim, Ho Yeun Chung, Ki Ok Han, Hyun Koo Yoon, In Kwon Han, Moon Young Kim, Jae Hyug Yang, Mi Jung Kim, Sun Young Ko, Yeon Kyung Lee; Korean Diabetes J. 2001;25(1):93-102. Published online February 1, 2001

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Abstract PDF: BACKGROUND
Self-monitoring of blood glucose (SMBG) and intensive therapy with insulin demonstrated to have a positive effects in the reduction of the neonatal complications in women with gestational diabetes (GDM). However the utility of SMBG in the mild GDM who does not requiring insulin has not been formally reported. Therefore, to evaluate the effectiveness of SMBG in the management of mild GDM, we compared the pregnancy outcome and the postpartum glucose tolerance of women who monitored their glycemic control by SMBG to those of women who monitored by laboratory glucose test at each office visit during pregnancy. METHODS: We studied 185 women diagnosed as a GDM by NDDG criteria and their fasting glucose concentration < 5.8 mM. All subjects had singleton pregnancy,and no medical diseases that may affect fetal growth, and were certain of gestational age by early ultrasonography. They were treated with an identical GDM management protocol except glucose monitoring. One hundred five women were monitored by laboratory glucose test at each office visit (office group) and 80 women were monitored by SMBG (SMBG group). Pregnancy outcome including rates of cesarian section, obstetric complication, LGA infant and glucose tolerance status at postpartum were compared between two groups. RESULTS: The age, height, prepregnancy weight, weight at delivery and parity were not significantly different between the two groups. Fasting, 1-h, 2-h glucose concentration during the diagnostic test of GDM in SMBG group were similar to those of office group. However, 3-h glucose concentration of office group was 0.3 mM higher than that of SMBG group. The rate of primary cesarian section, preterm labor and pregnancy-induced hypertension of SMBG group were similar to those of office group. The mean postprandial 2-h glucose concentration of office group measured at each office was 0.5 mM higher than that of SMBG group. Although 5% of office group were treated with insulin, 24% of SMBG group were requiring insulin therapy. The birth weight and LGA infant rate of office group were 3403 432 g and 28%, those were heavier and higher than those of SMBG group (3169 447 g, 13.8%). The 90% of office group and 84% of SMBG group were performed 75 g oral glucose tolerance test at postpartum 6-8 weeks. There was no significant difference in rates of diabetes and IGT between office and SMBG group (9.5%, 11.6%; 7.5%, 9.0% respectively). CONCLUSIONS: This study demonstrated that SMBG is very seful in early detection of maternal hyperglycemia and lowing the postprandial glucose, as well as reducing the rate of LGA infants in women with mild GDM.

Fetal Hyperinsulinemia and Ultrasonographic Measurement of Fetal Growth in Pregnancy Complicated by Gestational Diabetes Mellitus.: In Kwon Han, Chang Hoon Yim, Ho Yeon Jeong, Hak Chul Chang, Ki Ok Han, Hyun Ku Yoon, Park Jeong Eun, Soo Young Lee, Young Ho Lee; Korean Diabetes J. 1999;23(4):506-517. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Recently we reported that the large for gestational age (LGA) fetus of women with gestational diabetes mellitus (GDM) had disproportionate growth characterized by larger abdominal circumference (AC) but similar biparietal diameter (BPD) at third trimester compared to the fetus of normal pregnant women. The AC of LGA fetus appeared to be accelerated after 33 weeks gestation, and measurement of AC could be an effective method for prediction of LGA. Thus this study was performed to find the relationship between fetal hyperinsulinemia and disproportionate growth and to find the highly sensitive index for prediction of LGA infant in GDM. METHODS: We prospectively studied ultrasono- graphic growth patterns at 30, 34, 38 gestational weeks in 20 women with GDM and 15 normal pregnant women. The ultrasonographic measurements of fetus included biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), femur length (FL), mid-thigh circumference (MTC), mid-upper arm circumference (MUAC), mid-thigh subcutaneous fat thickness (MTFT), mid-upper arm subcutaneous fat thickness (MUAFT), fetal liver length (FLL), chest circumference (CC) and heart circumference (HTC). RESULTS: Compared to the fetus of normal pregnant women and appropriate for gestational age (AGA) fetus of GDM, LGA fetus of GDM had thicker MUAFT (3.9+0.9, 5.0+1.1, 5.6+1.7 mm, p=0.008) at 34 weeks, MUAFT (5.3+0.8, 5.6+0.9, 7.2+1.4 mm p=0.045) at 38 weeks and MTFT (5.2 +1.1, 5.5+0.8, 7.1+1.5 mm, p=0.019) at 38 weeks. They also had longer MUAC (120.3+9.9, 119.4+ 8.3, 138.7+11.2 mm, p=0.020) and CC(322.6+11.7, 324.4+15.7, 351.7+15.0mm, p=.025, respectively). There was a positive correlation between umbilical venous C-peptide concentration and birthweight (r=0.626, p=0.005) and symmetry index (r=0.523, p=0.03) of newborns. There was also a positive correlation between C-peptide concentration and MUAC (r=0.449, p=0.038) and MUAFT (r=0.426, p=0.045) in GDM group. CONCLUSION: The LGA fetus of women with GDM showed an accelerated growth of predominantly subcutaneous fat tissues that should be caused by the fetal hyperinsulinemia. Ultrasonographic measurement of subcutaneous tissues may be the most sensitive index for prediction of growth abnormalities in GDM at late gestation.

Prediction of Large for Gestational Age Infant in Women with Gestational Age Infant in Women with Gestational Diabetes Mellitus by Yltrasound Examination.: In Kwon Han, Hun Kee Min, Chang Hoon Yim, Ho Yeon Jeong, Hak Chul Chang, Ki Ok Han, Hyun Ku Yoon, Jeong Eun Park, Jae Eun Park, So Ra Park, Soo Young Lee, Young Ho Lee; Korean Diabetes J. 1999;23(3):326-335. Published online January 1, 2001

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Abstract PDF: BACKGROUND
In pregnancies complicated by diabetes, fetal hyperinsulinemia increases the deposition of fat, protein and glycogen in insulin-sensitive tissues leading to macrosomia, characterized by shoulder and truncal obesity. This may result in a shoulder dystocia, birth injury or fetal asphyxia. Thus, antenatal prediction of a large fetus for gestational age (LGA) can provide important information for the prevention of obstetric and perinatal complications. However, the measurement of materrml blood glucose concentration has yielded a low sensitivity for the prediction of LGA infants. This study was performed to determine whether fetal ultrasound examination could establish the onset of accelerated fetal growth in women with gestational diabetes mellitus (GDM) and to find the ultrasound indices for prediction of LGA infant. METHODS: The study subjects consisted of 77 women with GDM who had a singleton, and 156 women with a negative screen for GDM matched for age, height, and weight. All subjects had an early ultrasound examination before 14 weeks, assuring accurate dating and did not have any other medical condition that might affect fetal growth. Two ultrasound measurements including biparietal diameter (BPD), abdominal circumference (AC) and femur length (FL) were performed at the 2nd trimester (24.7+2.7 vs. 24.1+2.4 wks, p>0.05) and the 3rd trimester (35.0+1.9 vs. 35.3+1.3 wks,p>0.05, respectively). RESULTS: Although gestational age at delivery of GDM group was earlier than the control group (39.0 +1.4 vs. 39.7+1.1, p<0.01), birth weight and frequency of LGA infant were similar between two groups (3204+439 vs. 3288+371 g, p>0.05; 27.3% vs. 20.5%, p>0.05, respectively). However, the LGA subgroup of GDM had a larger AC and longer FL at the 3rd trimester compared to the appropriate gestational age (AGA) subgroup and control group. The AC of LGA subgroup of GDM appeared to be accelerated at 33 weeks gestation compared to the control group. When the upper limit of 95% confidential interval of AC of the control group was used for a cutoff value for predicting LGA in GDM at the 3rd trimester, sensitivity and specificity was 71% and 78%, respectively. CONCLUSION: The prediction of LGA infant in women with GDM might be achieved by an ultrasound examination of fetal AC at the 3rd trimester, especially after 33 weeks gestation.

Clinical Characteristics and Pregnancy Outcome in Korean Women with Type I & Type II Diabetes Mellitus.: Yoon Huh, Dong Won Suh, Hak Chul Jang, Chang Hoon Yim, Ki Ok Han, Hyun Ku Yoon, In Kwon Han, Hun Ki Min, Eun Sung Kim, Moon Young Kim, Hyun Mi Ryu, Sung Won Yang, Hae Kyoung Han; Korean Diabetes J. 1998;22(3):353-362. Published online January 1, 2001

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Abstract PDF: BACKGROUND
The prevalence of diabetes is gradually increasing iin Korean. Moreover, the prevalence of pregnancy complicated by established diabetes seems to be increasing. During the past decades, advances in the diabetes care as well as advances in fetal surveillance and neonatal care, have continued to improve pregnancy outcome of women with diabetes. However, the incidence of congenital anomalies and spontaneous abortion as well as the perinatal morbidity in the women with diabetes are still higher compared to those of the general population. In this study, we estimated the prevalence of prepmncy complicated by both type 1 and type 2 diabetes and described the clinical characteristics and outcome of diabetic pregnancies. METHODS: We analyzed data from four sources: 1) the mother(type and duration of diabetes, diabetic complication, preconceptional care), 2) obstetric outcome(method of delivery, obstetric complication), 3) neonatal outcome(birth weight, perinatal complication, congenital anomaly), 4) glycemic control during pregnancy, of women with pregestational diabetes delivered newborns at Samsung Cheil Hospital from 1992 to 1995. RESULTS: During the study period, 34 singleton infants were delivered by the 28 women with diabetes. The diabetic pregnancy was present in 0.14% of total deliveries in Samsung Cheil Hospital. Patients with IDDM comprised 18%(6/34) of total diabetic pregnancies, 82%(28/34) had NIDDM. The duration of diabetes was 6.3 and 2.1 years in patients with IDDM and NIDDM, respectively. Two IDDM patients presented with proliferative retinopathy, and 3 background retinopathy, one in IDDM and 2 in NIDDM. Three patients with IDDM and 2 patients with NIDDM had diabetic nephropathy. Insulin requirement during pregnancy was increased about 2 times at the time of delivery when compared to the initial in women with IDDM and NIDDM. Preeclampsia was the most common obstetric compliications, which were more frequently observed in women with diabetic complications. LGA was present in 43% of women with NIDDM. One infant of mother with NIDDM, delivered at 28 weeks gestation, was died because of respiratory distress and one infant of mother with IDDM had a congenital heart disease(TOF). Only 3 patients scught for the preconceptional care before pregnancy. CONCLUSION: Pregnancies complicated by diabetes was more frequent than was expected, even though it was much less than the rates in North America. Only 9% of women with diabetes had preconceptional care before pregnancy. The importance of planned pregnancy and prepregnancy counseling should be addressed in women with diabetes of child bearing age.

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