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Bo Yeon Cho  (Cho BY) 9 Articles
Hypertensive Complications in Patients with Primary Aldosteronism.
Seong Hee Kwon, Yeong Min Cho, Heoung Kyu Park, Do Jun Park, Chan Soo Shin, Kyong Soo Park, Seong Yeon Kim, Bo Yeon Cho, Hong Kyu Lee
J Korean Endocr Soc. 2002;17(1):95-103.   Published online February 1, 2002
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BACKGROUND
Primary aldosteronism (PA) is believed to be a benign form of secondary hypertension due to the low incidence of hypertensive complications. Recently, several studies have shown that hypertensive complications were common in patients with PA. Therefore, we investigated hypertensive complications in 46 PA patients. METHEODS: Clinical and laboratory features of 46 46 patients were retrospectively analyzed. Hypertensive complications of this group were left ventricular hypertrophy, cerebrovascular accidents, hypertensive nephropathy and hypertensive retinopathy. RESULTS: Hypertensive complications were found in 30 (65.2%) of the 46 patients. The incidence of severe hypertension (higher than or equal to 110 mmHg in diastolic blood pressure) was 17.6%. Left ventricular hypertrophy was found in 26 (56.7%) of the 46 patients. Cerebrovascular accidents were found in 6 patients, and hypertensive nephropathy in 4 patients. The incidence of severe hypertensive retinopathy (higher than or equal to grade 3 in the Keith-Wagener Barker classification) was 17.6%. Of the 35 PA patients who underwent surgical treatment hypertension was found in 18 (51.4%). CONCLUSION: These results indicate that hypertensive complications are common in patients with PA, suggesting that early detection, treatment and close follow-up are necessary in PA.
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A Case of Black Adrenocortical Adenoma Causing Cushing's Syndrome with Contralateral Nonfuncioning Adenoma.
Do Joon Park, Kyung Soo Park, Kyung Jae Nam, Sung Yeon Kim, Bo Yeon Cho, Hong Gyu Lee, Yeo Kyu Yoon, Seung Keun Oh
J Korean Endocr Soc. 1999;14(2):410-417.   Published online January 1, 2001
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We report herein the case of a 38-year-old woman with Cushings syndrome caused by bilateral adrenocortical adenomas. The adrenal tumor on the left side hypersecreted cortisol and no findings of cortisol hypersecretion from the adrenal tumor on the right side were observed on bilateral adrenal vein samplings. Both adrenal tumors were resected and histologically without any findings of nodular hyperplasia. The left adrenal tumor was histologically diagnosed as a so-called black adenoma. These data imply that the adrenal adenomas developed primarily from the adrenal gland itself, and that one of the tumors was well differentiated and secreted excess hormones, while the other remained in cell proliferation without hypersecretion.
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Serum Leptin in Cord Blood and Its Relation with Birth Weight and Metabolic Parameters.
Do Joon Park, Yun Yong Lee, Kyung Soo Park, Sung Yeon Kim, Bo Yeon Cho, Hong Gyu Lee, Gun Sang Park, Jong Kwan Jun, Bo Hyun Yoon
J Korean Endocr Soc. 1999;14(2):365-371.   Published online January 1, 2001
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BACKGROUND
Leptin, produced in the adipose tissue, is involved in the regulation of body weight. The release of the leptin is increased in obese adults even in children. This study investigated whether the serum leptin in cord blood was related to babys birth weight and metabolic parameters. METHODS: 71 pairs of singleton pregnancy babies and their mother were studied. Babies are classified in LGA (large for gestational age), AGA (appropriate for gestational age), SGA (small for gestational age) three groups. After delivery, cord blood and maternal venous blood samples were drawn. We measured the plasma leptin, insulin-like growth factor (IGF)-1, insulin and proinsulin in cord and maternal serum. RESULTS: The concentration of leptin from cord blood was increased in LGA babies and decreased in SGA babies compued with the level in AGA babies. There was positive correlatian (r=0.55, p<0.01) between the plasma leptin level in cord and birth weight. There were positive correlatian between both the plasma proinsulin (r=0.37, p<0.01) and IGF-1 (r=0.32, p<0.01) and birth weight, too. But there was no difference between female and male baby's cord blood leptin level. In multiple regression analysis, cord blood leptin level was found independent factor related to birth weight ( p=0.001) CONCLUDION : The plasma leptin, proinsulin and IGF-1 is correlates to the birth weight. These data provide evidence that leptin and proinsulin are highly related to the nutritional status already during the fetal periods, and effect on the intrauterine fetal growth.
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Influence of Early Age at Menopause on Bone Mineral Density and Biochemical Bone Marker.
Young Joo Park, Chan Soo Shin, Do Joon Park, Jung Koo Kim, Sung Yeon Kim, Bo Yeon Cho, Hong Gyu Lee, Jae Hyun Kim, In Kyung Chung
J Korean Endocr Soc. 1999;14(2):346-354.   Published online January 1, 2001
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BACKGROUND
Among the various factors affecting bone mass and bone metabolism, aging and menopause play a major role. After the disappearance of the menstrual cycle, estrogen deficiency is the most important factor in bone loss. It is still unclear whether women with early menopause have a rate of bone loss different from women whose menopause has occurred later. Various biochemical bone markers are increased after menopause but it is still unclear whether women with early menopause have biochemical bone markers different from women whose menopause has occurred later. The aim of this study was to establish whether healthy women with early or normal menopause have different bone mass, biochemical bone markers and rates of bone loss. METHODS: Postmenopausal healthy women were divided into two groups according to their age at menopause(AAM): one group with AAM > 43 years, and the other group with AAM 50 years. Bone mass was measured using a dual energy X-ray absorptiometry(DEXA) in the lumbar, femur neck, femur trochanter, and Wards triangle. Serum levels of bone alkaline phosphatase and osteocalcin, and urine levels of calcium, deoxypyridinoline and type I collagen N-telopeptide were measured using a commercial kit. RESULTS: Age and body mass index in the early menopause group were different from those in the normal menopause group. All the bone mass and the biochemical bone markers in the early menopause group were not different from those in the normal menopause group. We selected 15 subjects from the two groups matched by age and BML Bone mass of femur neck in the early menopause group was lower than in the normal menopause group matched by age and BMI. Bone mass in lumbar, femur trochanter, and Wards triangle was lower in the early menopause group than in the normal menopause group, but the difference between the two groups was not significant. After adjusting years since menopause, we didnt find the difference of bone mass between the two groups. All the bone biochemical markers were not different in the two groups matched by age and BMI. CONCLUSION: Our data suggest that women with early menopause dont lose bone faster than women with normal menopause.
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Prevalence Thyroid Cancer in Patients with Cold Thyroid Nodules in Relation to Sex, Age, And Multinodularity.
Won Bae Kim, Hyun Kyung Chung, Chang Hoon Yim, Do Joon Park, Sung Yeon Kim, Bo Yeon Cho, Hong Gyu Lee
J Korean Endocr Soc. 1998;13(3):366-372.   Published online January 1, 2001
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BACKGROUND
We evaluated the prevalence of thyroid cancer in patients with cold thyroid nodules and the impact of sex, age, hardness of nodule, and multinodularity as factors able to predict the probability of malignancy in patients with nodular thyroid diseases. METHODS: We examined a 728 patients who visited Seoul National University Hospital with one or more cold thyroid nodules between Jan. 1996 and Dec. 1997. After clinical evaluations including medical history, physical examinations(size, hardness and multiplicity of nodule), fine needle aspiration biopsies and cytologic examinations were carried out. RESULTS: Among the 728 cases, 76 cases(10.4%) were diagnosed as cancer and 602 cases (82.6%) were diagnosed as benign nodule. The prevalence of cancer was significantly lower in female patients with cold nodules(9.4%, 62/662) than in males(17.5%, 11/63)(p=0.041). Age was an important factor in both sexes. The proportion of nodules that were malignant was lower in patients of 20-60 years old(8,9%, 56/632) than patients younger than 20 years old(1S.1%, 2/11) or older than 60 years old(18.3%, 15/82)(p=0.019). The prevalence of cancer was significantly higher in hard nodules(36.3%, 41/113) than firm(5.2%, 30/574) or soft nodules(5.3%, 2/38)(p= 0.001). There was no size difference between malignant(25.2 +- 13.7mm) and benign nodules(25.3 +- 8.9mm)(p=0.9425). The prevalence of thyroid cancer in solitary nodule(10.6%, 63/593) was not different from that in multiple nodules(7.6%, 10/132)(p=0.293). CONCLUSION: Our data suggest that thyroid nodules of the patients who are younger than 20 years old or older than 60 years old, male, as well as hard nodule require more careful evaluation for the risk of thyroid malignancies.
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The Incidence of Postpartum Thyroiditis and Effect of High Iodine Intake on it in Korean Women.
Won Bae Kim, Chang Hoon Yim, Kyung Soo Park, Byoung Sool Moon, Jae Hoon Lee, Hye Won Jun, Ho Jun Jin, Sung Yeon Kim, Bo Yeon Cho, Hong Gyu Lee
J Korean Endocr Soc. 1998;13(3):339-350.   Published online January 1, 2001
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BACKGROUND
Postpartum thyroiditis(PPT) is one of syndromes of thyroid dysfunction that occurs in the first year after parturition. Reported incidence of PPT is 3.9-8.2% of postpartum women in several studies from different countries. The fact that 52-100% of patients with PPT have thyroid autoantibodies, and that lymphocytic infiltration of thyroid gland is the characteristic pathological feature of PPT suggest that PPT is an autoimmune disease. High iodine intake in short term period is known to aggrevate the experimental autoimmune thyroiditis. This study was performed to investigate the incidence and clinical features of PPT in Korean postpartum women who usually ingest excessive amount of idine in immediate postpartum period and to investigate the predictive value of thyroid autoantibodies in the development of PPT in them. METHOD: Between March 1996 and February 1997, 99 women without previous history of any thyroid disease who delivered babies at Boramae hospital were enrolled. Thyroid function parameters(T3, T4, free T4, TSH), thyroid autoantibodies(anti-microsomal antibody, anti-thyroglobulin antibody) and urinary iodine excretion were measured prospectively before and 1, 3 months after delivery. Dietary iodine intake during postpartum period was evaluated by questionnaire, and clinical parameters were followed up. RESULTS: During 3 months of observation, PPT developed in 8.1%(8/99) of postpartum women. Five cases had typical course having thyrotoxic phase and the other 3 cases had hypothyroid phase without toxic phase. However, only one of those required thyroid hormone replacement therapy in the latter group. There were no differences in age, baseline thyroid function parameters, parity, percent cases with family history of thyroid disease between those developed PPT (n=8) and those did not develop PPT(n=91). Duration of high iodine intake(3.8 +- 0.5 wk. vs. 3.7 +- 0.8 wk., p>0.05), total ingested amount of high iodine diet(77 +- 28 vs. 79 +- 24 bowels of miyokguk, p)0.05), and the urinary iodine excretion(1.9 +- 1.4 mg/g creatinine vs. 3.7 +- 3.7mg/g creatinine, p0.05) at 1 month postpartum were not different between two groups. Of 99 total subjects, anti-microsomal antibody(AMA) was present in 13.1%(13/99) before delivery in their sera. Positive predictive value of the presence of AMA before delivery in predicting the development of PPT was 30.8%. CONCLUSION: The fact that incidence of PPT in normal Korean postpartum women who usually have high iodine intake in immediate postpartum period is not higher than those of other countries, and that there was no difference in the amount of iodine intake between those developed PPT and those did not suggest that high iodine intake in immediate postpartum period do not influence on the incidence of PPT. The presence of AMA before delivery had low specificity in prediction of development of PPT, so the measurement of AMA seems not to be a useful screening test.
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Usefulness of Immunoglobulin Fraction Precipitated with Polyethylene Glycol in Assay for TSH Receptor Antibodies using Chinese Hamster Overy Cells Expressing Human TSH Receptors.
Won Bae Kim, Hyun Kyung Chung, Chang Soon Koh, Chang Hoon Yim, Do Joon Park, Bo Yeon Cho, Hong Gyu Lee
J Korean Endocr Soc. 1998;13(2):167-180.   Published online January 1, 2001
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BACKGROUND
Graves' disease and primary myxedema are thought to be caused by the action of TSH receptor autoantibodies(thyroid stimulating antibody; TSAb & thyroid stimulation blocking antibody; TSBAb). Thus, detection of these antibodies is crucial in diagnosis and in follow up of those patients. Recently, a sensitive method using human TSH receptor transfected Chinese Hamster Ovary(CHO) cells has been developed. However, the complexity of IgG purification procedure is considered as a limitation for its clinical application as a routine test. The aim of this study is to determine whether polyethylene glycol(PEG)-precipitated immunogiobuIin fraction could substitute for purified IgG. METHODS: We developed optimal conditions for TSAb and TSBAb assays using crude, PEG precipitated immunoglobulin fraction; and evaluated the correlation of TSAb and TSBAb activities between thase measured using crude immunoglobulin fraction and purified IgG to clarify the usefulness of PEG-precipitated immunoglobulin fraction. TSH receptor expressing wild type CHO cells were used in TSAb and CHO cells expressing chimeric TSH receptor(Mc2; 90-165 amino acid residues were substituted by those of rat LH/CG receptar) were used in TSBAb assay to minimize the possible disturbing effects of TSAb in serum. RESULTS: The optimal serum amount for TSAb and TSBAb assay using PEG-precipitated immunoglobulin fraction were 250mL serum equivalent/well and 50mL serum equivalent/well, respectively. The optimal incubation time for both assays were 2 homs, and aptimal ccrncentration of bTSH for TSBAb assay was 0.1U/L. TSAb activities measured with PEG-precipitated immunoglobulin were significantly correlated with those measured with purified IgG in 26 patients with Graves diseases(r=0.93, p<0.001). Although TSBAb activities measured using PEG-precipitated imrnunoglobulin were conelated with those measured using purified IgG in 20 patients with primary myxedema(r=0.86, p<0.001), the positive rate in TSBAb assay using PEG-precipitated immunoglobulin was lower than that of usmg purified IgG(20% v.s. 65%) because of negative conversion of TSBAb activities in samples with weakly positive TSBAb activities measured using purified IgG. CONCLUSION: PEG-precipitated immunoglobulin fraction could be used instead of purified IgG in TSAb assay using hTSHR-tranasfected wild type CHO cells with equal sensitivity and specificity. This simple and practical TSAb assay using PEG-precipitated immunoglobulin in hTSHR-transfected CHO cells would be useful in clinica1 practiee.
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A Case of Cughing's Disease which Responded to the Combined Treatment of Ketoconazole and Octreotide.
Chan Soo Shin, Chang Hoon Yim, Jae Jun Koh, Sung Yeon Kim, Bo Yeon Cho, Hong Gyu Lee
J Korean Endocr Soc. 1998;13(1):94-98.   Published online January 1, 2001
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The treatment of choice for Cushing's disease is surgical removal of tumor, the source of ACTH overproduction. In occasional patients in whom a surgical approach including total adrenalectomy is not feasible or surgical removal of tumor is not complete, medical treatment may be necessary because pituitary irradiation requires a long 1ag time to remission. Although ketoconazole, an imidazole derivative with inhibitory activity on adrenal steroidogenesis has been reported to be effective in the treatment of Cushing's disease, the limited effectiveness in lowering very high level of cortisol and occasional hepatotoxicity restrains its wide use. In this report, we describe a woman with Cushing's disease due to pituitary microadenoma. Transsphenoidal pituitary adenomeetomy followed by ketoconzole treatment had been unsuccessful in achieving remission of the disease, but combined treatment with ketoconazole and octreotide accomplished successful reduction in cortisol production.
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Changes of blood pressure and RBC membrane Na+ transport in thyroid disease.
Won Bae Kim, Kyung Soo Ko, Suk In Lee, Seong Yeon Kim, Bo Yeon Cho, Hong Kyu Lee, Chang Soon Koh, Hun Ki Min
J Korean Endocr Soc. 1991;6(1):25-37.   Published online January 1, 2001
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No abstract available.
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Endocrinol Metab : Endocrinology and Metabolism