Skip Navigation
Skip to contents

Diabetes Metab J : Diabetes & Metabolism Journal

Search
OPEN ACCESS

Author index

Page Path
HOME > Browse > Author index
Search
Soo Kyung Kwon  (Kwon SK) 2 Articles
Cytoprotective Effect by Antioxidant Activity of Quercetin in INS-1 Cell Line.
Min Jeong Kwon, Hye Sook Jung, Mi Kyung Kim, Seong Hoon Kang, Gwang Wook Seo, Jae Kwang Song, Tae Yeon Yoon, Min Kyeong Jeon, Tae Hwan Ha, Chang Shin Yoon, Mi Kyung Kim, Woo Je Lee, Jeong Hyun Noh, Soo Kyung Kwon, Dong Joon Kim, Kyung Soo Koh, Byung Doo Rhee, Kyung Ho Lim, Soon Hee Lee, Jeong Hyun Park
Korean Diabetes J. 2007;31(5):383-390.   Published online September 1, 2007
DOI: https://doi.org/10.4093/jkda.2007.31.5.383
  • 2,477 View
  • 27 Download
  • 2 Crossref
AbstractAbstract PDF
BACKGROUND
Oxidative stress is induced under diabetic conditions and causes various forms of tissue damages in the patients with diabetes. Recently, pancreatic beta cells are regarded as a putative target of oxidative stress-induced tissue damage, and this seems to explain in part the progressive deterioration of beta cell function in type 2 diabetes. The aim of this study was to examine the potential of Quercetin (QE) to protect INS-1 cells from the H2O2-induced oxidative stress and the effects of QE on the glucose-stimulated insulin secretion in INS-1 cells. METHODS: To study the cell viability, cells were incubated with H2O2 and/or QE at the various concentrations. To confirm the protective effect by QE in response to H2O2, the levels of antioxidant enzymes were assessed by RT-PCR and Western blot, and glutathione peroxidase activities were quantified by spectrophotometrical method. Glucose-stimulated insulin secretion (GSIS) was measured by ELISA. RESULTS: Cell incubations were performed with 80 microM of H2O2 for 5 hours to induce 40 - 50% of cell death. QE gradually showed protective effect (IC50 = 50 microM) in dose-dependent manner. Superoxide dismutase (SOD) mRNA level in H2O2 + QE group was increased as compared to H2O2 group, but catalase did not changed. And the QE recruited glutathione peroxidase activity against H2O2-induced oxidative injuries in INS-1 cells. CONCLUSION: In conclusion, these findings suggest that QE might have protective effect on beta cells by ameliorating oxidative stress and preserving insulin secretory function.

Citations

Citations to this article as recorded by  
  • Anti-diabetic effects of Allium tuberosum rottler extracts and lactic acid bacteria fermented extracts in type 2 diabetic mice model
    Bae Jin Kim, Seung Kyeung Jo, Yoo Seok Jeong, Hee Kyoung Jung
    Korean Journal of Food Preservation.2015; 22(1): 134.     CrossRef
  • Protective Effects of Sasa Borealis Leaves Extract on High Glucose-Induced Oxidative Stress in Human Umbilical Vein Endothelial Cells
    Ji-Young Hwang, Ji-Sook Han
    Journal of the Korean Society of Food Science and Nutrition.2010; 39(12): 1753.     CrossRef
Serum Adiponectin, TNF-alpha, IL-6 and Insulin Resistance in Women with Polycystic Ovary Syndrome.
Young A Kim, Jung Hyun Noh, Dong Jun Kim, Tae Hyun Um, Chong Rae Cho, Na young Jang, Soo Kyung Kwon, Soon Hee Lee, Jeong Hyun Park, Kyung Soo Ko, Byoung Doo Rhee, Kyung Ho Lim
Korean Diabetes J. 2006;30(2):104-111.   Published online March 1, 2006
DOI: https://doi.org/10.4093/jkda.2006.30.2.104
  • 2,535 View
  • 19 Download
  • 1 Crossref
AbstractAbstract PDF
BACKGROUND
To determine plasma adipokines such as adiponectin, IL-6 and TNF-alpha concentrations in women with and without polycystic ovary syndrome (PCOS) and to assess possible correlations of adipocytokines to the hormonal and metabolic parameters, including measures of insulin resistance (IR). METHODS: Forty-four selected women were classified as follows: 13 obese (body mass index [BMI] > or = 25 kg/m(2)) with PCOS; 15 non-obese (BMI < 25 kg/m(2)) with PCOS; 8 obese without PCOS, and 8 non-obese without PCOS. Blood samples were collected from all women with or without PCOS after an overnight fast. Serum levels of luteinizing hormone (LH), follicle-stimulating hormone (FSH), total testosterone, 17-alpha-hydroxyprogesterone, dehydroepiandrosterone sulfate (DHEA-S), sex hormone-binding globulin (SHBG), insulin, glucose, adiponectin, TNF-alpha and IL-6 were measured. Measures of IR included HOMA-IR and QUICKI. RESULTS: In non-obese group, fasting insulin levels and HOMA-IR in PCOS were significantly higher compared to control. However, Adiponectin, TNF-alpha and IL-6 concentrations were found not to be different in obese women with PCOS as compared with obese women without PCOS and in non-obese women with PCOS as compared with non-obese women without PCOS. Adiponectin concentrations correlated inversely with BMI, waist circumference (WC), total fat mass, serum insulin, and HOMA-IR in PCOS group. However, multiple regression analysis showed that BMI was the only independent determinant of adiponectin concentration. CONCLUSION: Our results suggest that insulin sensitivity per se probably does not play any role in the control of adipokines levels such as adiponectin, TNF-alpha and IL-6 in PCOS women

Citations

Citations to this article as recorded by  
  • Adiponectin in Women with Polycystic Ovary Syndrome
    Hyun-Young Shin, Duk-Chul Lee, Ji-Won Lee
    Korean Journal of Family Medicine.2011; 32(4): 243.     CrossRef

Diabetes Metab J : Diabetes & Metabolism Journal