Endocrinology and Metabolism

Original Article

Adrenal gland
Clinical Characteristics for 348 Patients with Adrenal Incidentaloma: Jongho Kim, Kwi Hyun Bae, Yeon Kyung Choi, Ji Yun Jeong, Keun Gyu Park, Jung Guk Kim, In Kyu Lee; Endocrinol Metab. 2013;28(1):20-25. Published online March 25, 2013; DOI: https://doi.org/10.3803/EnM.2013.28.1.20

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Background

Adrenal incidentaloma is an adrenal neoplasm frequently encountered in clinical practice for which detection rates have recently increased. We describe here the clinical characteristics of adrenal incidentalomas.

Methods

A retrospective study was performed examining the age, sex, location, size, function, and the histological findings for 348 patients with an adrenal mass discovered incidentally on computed tomography (CT) undertaken for health examination or nonadrenal disease from August 2005 to May 2012.

Results

Patients consisted of 156 males (44.8%) and 192 females (55.2%), aged between 20 and 86. Adrenal masses were most commonly found in patients in their sixth decade (32.5%). Regarding the location of the masses, 62.0% were found in the left adrenal gland, 30.2% were found in the right, and 7.8% were found bilaterally. Of all of the masses analyzed, 87.1% were 1 to 4 cm in size, and an adenoma-like appearance was the most common finding (75.3%) seen on CT scans. Hormonal analysis showed that 82.2% of the masses were nonfunctioning, 6.0% were diagnosed as subclinical Cushing's syndrome, 4.6% were aldosterone-producing adenomas, and 7.2% were pheochromocytomas. Adrenalectomy was performed in a total of 69 patients having adenoma (50.7%), pheochromocytoma (24.6%), and carcinoma (4.3%).

Conclusion

The characteristics of benign, malignant, nonfunctional, and functional adrenal masses that were incidentally found at our hospital were similar to those presented in other studies.

Citations

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Case Report

The Effect of Octreotide LAR on GH and TSH Co-Secreting Pituitary Adenoma.: Nam Keong Kim, Yu Jin Hah, Ho Young Lee, Sang Jin Kim, Mi Kyung Kim, Keun Gyu Park, Ealmaan Kim, Hyukwon Chang, Hye Soon Kim; Endocrinol Metab. 2010;25(4):378-381. Published online December 1, 2010; DOI: https://doi.org/10.3803/EnM.2010.25.4.378

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Abstract PDF: Growth hormone (GH) and thyroid stimulating hormone (TSH)-secreting pituitary adenomas are very rare and they account for only 0.5% for all pituitary adenomas. These adenomas are usually treated with surgery, but this surgery is not easy because the tumor is usually huge and invasive. We reported here on a case of a GH-TSH-secreting adenoma in a 23-year-old male patient who was initially treated with octreotide LAR. He presented with symptoms of headache, palpitation and a visual defect that he had for the 3 months. He had hypertrophy of the frontal bone and enlargement of both the hands and feet. The visual field test showed bitemporal hemianopsia. The laboratory examinations showed high serum levels of free T4, TSH and free alpha-subunit. Additionally, the serum levels of GH and insulin-like growth factor-I (IGF-I) were increased. GH was not suppressed below 1microg/L by an oral 75g glucose loading test, and TSH was not stimulated by thyrotropin-releasing hormone (TRH). Because sellar MRI showed invasive macroadenoma encasing the vessels, we initially tried octreotide LAR for treatment. A year later, the IGF-I and thyroid function tests were normalized and the size of the tumor was reduced with cystic change. The symptoms of palpitation and headache were improved without a change of the visual field defect.

Original Article

Effects of Alpha-lipoic Acid on SREBP-1c Expression in HepG2 Cells.: Tae Sung Yun, Ae Kyung Min, Nam Kyung Kim, Mi Kyung Kim, Ho Chan Cho, Hye Soon Kim, Jae Seok Hwang, Seong Yeol Ryu, Keun Gyu Park, In Kyu Lee; J Korean Endocr Soc. 2008;23(1):27-34. Published online February 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.1.27

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Abstract PDF

BACKGROUND
Non-alcoholic fatty liver disease is common in patients with insulin resistance. Sterol regulatory element binding protein-1c (SREBP-1c) is a member of a family of transcription factors that have been recognized as key regulators for lipid accumulation in the liver that activate enzymes involved in the fatty acid biosynthetic pathway. This study was designed to evaluate whether alpha-lipoic acid (ALA) inhibits insulin-stimulated SREBP-1c expression. METHODS: We investigated the effects of ALA on insulin-stimulated SREBP-1c expression in a human hepatoma cell line (HepG2 cells) using Northern and Western blot analysis. We also examined the effect of ALA on the promoter activity of the SREBP-1c gene to examine whether ALA can affect SREBP-1c expression at the transcriptional level. To discern the mechanism by which ALA inhibits SREBP-1c expression, we examined the role of AMP-activated protein kinase (AMPK). RESULTS: Insulin increased the expression of SREBP-1c mRNA and protein in HepG2 cells in a dose depended manner. Co-treatment with ALA inhibited the insulin increased SREBP-1c expression in a dose-dependent manner. ALA also inhibited insulin-stimulated activation of the SREBP-1c promoter activity, indicating that ALA inhibited SREBP-1c expression at the transcriptional level. ALA increased phosphorylation of AMPK in HepG2 cells. Inhibition of the AMPK activity by compound C markedly reversed the inhibitory effects of ALA for insulin-stimulated SREBP-1c expression. These results suggest that ALA-induced suppression of SREBP-1c expression is at least in part mediated via AMPK activation. CONCLUSION: The present study suggests that ALA has an inhibitory effect on insulin-stimulated SREBP-1c expression. Therefore, further studies on the effects of ALA on hepatic steatosis in an animal model need to be performed.

Citations

Citations to this article as recorded by

Effects of an aqueous extract of purple sweet potato on nonalcoholic fatty liver in high fat/cholesterol-fed mice
You Jin Lee, Yoon Kyoung Yang, You Jin Kim, Oran Kwon
Journal of Nutrition and Health.2015; 48(1): 1. CrossRef
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You Jin Lee, Yoon Kyoung Yang, You Jin Kim, Oran Kwon
Journal of Nutrition and Health.2015; 48(1): 1. CrossRef

Review Article

Endoplasmic Reticulum Stress and Diabetes.: Mi Kyung Kim, Keun Gyu Park; J Korean Endocr Soc. 2008;23(1):1-8. Published online February 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.1.1

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Abstract PDF

No abstract available.

Citations

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