Browsing by Author "Çalkan, M"

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    Examining Acute Changes in Some Serum Biochemical Markers of Brain Tissue Damage After Free and Greco-Roman Style Wrestling
    Arslan, F; Büyükyazi, G; Ulman, C; Taneli, F; Gözlükaya, F; Çalkan, M
    Purpose: This study aimed to examine the acute changes in some serum biochemical markers due to overloading in one match of Greco-Roman and free style wrestling competitions. Method: In a repeated measures design, serum samples were collected before and 20 minutes after the first matches of the wrestlers during local wrestling competitions; subsequently analyzed for S-100B and heart-type fatty acid-binding protein. Study groups composed of Greco-Roman (n=15) and free style (n=16) wrestling groups of >= 19 year-old, healthy, male wrestlers. All matches were video-recorded for trauma analyses for each player. Results: Study results showed increments of 109% (p=.007) and 145% (p=.001) in serum S-100B; 63% (p=.023) and 198% (p=.002) in heart-type fatty acid-binding protein levels from pre to post match in the free and Greco-Roman style groups, respectively. The comparison of the increases obtained in the measured parameters did not reveal significant differences between the groups. Conclusion: Due to the significant increases in serum markers, there may be a possible additive effect of traumas in causing brain injuries/head traumas in free and Greco-Roman style wrestling. However, different style wrestling did not affect serum markers indicating brain tissue damage differently.
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    The effect of obesity on testicular function by insulin-like factor 3, inhibin B, and leptin concentrations in obese adolescents according to pubertal stages
    Taneli, F; Ersoy, B; Özhan, B; Çalkan, M; Yilmaz, Ö; Dinç, G; Genç, A; Taneli, C
    Objectives: The aim of the present study is to investigate the effect of obesity on testicular function by evaluating reproductive hormones, inhibinB, insulin-like 3(INSL3), and leptin, in obese and non-obese adolescents according to pubertal Tanner stages. Design and methods: Eighty adolescent boys were grouped (n = 20) as; Group1 : obese-Tanner2, Group2: non-obese-Tanner2, Group3: obese-Tanner4, Group4: non-obese-Tanner4. Serum INSL3, luteinizing hormone, follicle-stimulating hormone, total testosterone, free testosterone, estradiol, sex hormone binding globulin, inhibin B and leptin levels were assessed in all groups. Results: INSL3 levels were significantly lower in obese adolescents compared to non-obese boys (p = 0.003, Tanner2) and (p = 0.031, Tanner4). There was a negative correlation between INSL3 and leptin (r = -0.468, p = 0.001). The negative correlation between INSL3 and BMISDS indicates that pubertal obesity leads to Leydig cell impairment. Conclusions: This study demonstrated for the first time in the literature that obesity effects testicular Leydig cell function starting from Tanner stage 2. (C) 2010 The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.