Browsing by Author "Arvas, G."

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Effect of Capsaicin on Transcription Factors in 3t3-L1 Cell Line
(Yuzuncu Yil Universitesi Tip Fakultesi, 2015) Berkoz, M.; Yildirim, M.; Arvas, G.; Turkmen, O.; Allahverdiyev, O.
Capsaicin is a spicy ingredient of Capsicum annuum and a lipophilic, crystalline, odorless and colorless alkaloid. Although the effect of capsaicin on adipocyte differentiation is well-known, the role of capsaicin on transcription factors while adipocyte differentiation is not clear. The aim of this study is thus to identify and characterize the transcription factors in the process of adipocyte differentiation after the capsaicin treatment. In this study, concentration of 0, 50, 100, 150, 200 and 250 µM capsaicin were treated to 3T3-L1 pre-adipocytes in cell culture. MTT cell cytotoxicity, cell viability with trypan blue staining, Lactate Dehydrogenase (LDH) enzyme assay, triglyceride content assay, Glycerol-3-Phosphate Dehydrogenase (GPDH) activity, Oil Red O staining and mRNA levels of transcription factors (PPARγ, C/EBPα and SREBP-lc) were investigated in capsaicin induced 3T3L1 preadipocyte cell line. Capsaicin treatment decreased cell population growth of 3T3-L1 preadipocytes, assessed with trypan blue staining, MTT test and rising of LDH release proportion. Capsaicin inhibited GPDH activity and intracellular triglyceride content in 3T3-L1 adipocytes in all treated groups in a dose-dependent manner. Oil Red O staining indicated that capsaicin inhibited adipocyte differentiation in 3T3-L1 adipocytes in all treatment groups. In this study, it was revealed that exposing 3T3-L1 preadipocytes and differentiating postconfluent preadipocytes to different doses of capsaicin decreased PPARγ, C/EBPα and SREBP-1c mRNA levels as compared with their controls without treatment in dose dependent manner. Although, reduction of PPARγ mRNA level was statistical significant, this decrease was not significant in C/EBPα and SREBP-1c mRNA levels. This study demonstrated that capsaicin treatment inhibited the adipogenesis through the down-regulation of transcription factors, especially PPARγ. Alternative mechanisms may involve cell cycle arrest and the induction of apoptosis. Since capsaicin is the main component found in hot pepper, the consumption of hot pepper may contribute to the maintenance of body weight and prevent the development of obesity. © 2015 Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.
Lung Cancer, Brucellosis and Tuberculosis: Remarkable Togetherness
(2013) Akkoyunlu, M.E.; Akkoyunlu, Y.; Hakyemez, I.N.; Erboy, F.; Arvas, G.; Aslan, T.
A 68 years old male farmer referred with cough, expectorating sputum, intermittant fever, night sweats, fatigue and anorexia persisting for two weeks. There was a history of 80 packs each year of smoking and he was still an active smoker. Pneumonectomy was performed because of pulmonary epidermoid cancer and he received chemotherapy. He was diagnosed lung tuberculosis and using anti-tuberculous treatment for 4 months. He had a weight loss of 8 kg in last month. His body tempereature was 38.5 °C. Heart rate was 100/min. ESR was 51mm/h and CRP was 5.6 mg/dL. There was no proliferation in blood and sputum cultures. Three sputum specimens were examined and AFB wasn't detected. Fibronodular infiltration was seen in right lower zone of chest X-ray. In thorax CT, fibronodular densities were seen in lower lobe anterior and posterior segments. Brucella melitensis was isolated in blood culture. Second bronchoscopy was performed with suspect of brucellosis pneumonia. Brucella tube agglutination test was positive at titer 1/320 in the bronchial lavage fluid and 1/640 in concurrent serum sample. In cases with chronic cough or pneumonia which is irresponsive to nonspecific antibiotherapy, respiratory brucellosis must be rememberred in endemic areas. © 2013 Asian Pacific Tropical Medicine Press.