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    Effect of Training and Gender on Plasma Irisin, Leptin, and Insulin Levels
    (INT JOURNAL APPLIED EXERCISE PHYSIOLOGY, 2018) Arikan, S.; Revan, S.; Balci, S. S.; Sahin, M.; Serpek, B.
    The objective of this study is the comparison of the irisin, leptin, and insulin hormone levels of the female and male elite athletes and non-athletes. Elite taekwondo athletes (7 males, 6 females) and university students (8 males, 6 females) between the ages of 16 and 20 years volunteered to participate in this study. In the beginning of the study, the body compositions of the participants were determined and their plasma irisin, leptin, and insulin hormone analyses were determined by the Enzyme-Linked Immuno Sorbent Assay (ELISA) method. After an overnight fast, the blood samples were collected at 8:00 a.m. A two-way ANOVA was performed to examine the effects of gender and training status. There was found no significant main and/or interaction effect of training and gender on the irisin and insulin hormone levels (p>0,05). However, training and gender affected the leptin levels significantly (p<0.05). The leptin levels in females in both athletes and non-athletes were higher than males to significant extent and the leptin levels of both female and male athletes were significantly lower than non-athletes. As a result, it can be said that exercise training status and gender do not affect the levels of irisin and insulin hormones, but they increased the leptin level.
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    Effects of CoQ10 supplementation and swimming training on exhaustive exercise-induced oxidative stress in rat heart
    (COMENIUS UNIV, 2012) Okudan, N.; Revan, S.; Balci, S. S.; Belviranli, M.; Pepe, H.; Gokbel, H.
    This study examined the combined effects of swimming training and coenzyme Q(10) (CoQ(10)) supplementation on exhaustive exercise-induced oxidative stress in rat heart. The study was carried out with 4-month-old young adult male Wistar rats. Sixty four rats were divided mainly into two groups: trained and control. Each group was further divided into four subgroups: rest, exhausted, rest with CoQ(10), exhausted with CoQ(10). The training program consisted of swimming one hour each day, five days a week, for six weeks. At the end of sixth week, rats in exhausted exercise group were forced to swim until exhaustion and then they were immediately sacrificed, while rats in rest group were sacrificed at rest. Training alone or in combination with CoQ(10) supplementation reduced to increasing MDA levels due to exhaustive exercise in rat heart (p<0.05). The trained-rest with CoQ(10) group showed lower 8-OHdG levels than the control-rest with CoQ(10) group. Exhaustive exercise effect was significant on SOD activity. Exhaustive exercise increased GSH levels in control groups while decreased GSH levels in training groups (p<0.05). In conclusion, the results suggest that CoQ(10) supplementation combined with training may inhibit lipid peroxidation and DNA damage in the heart tissue. Also, it can be said that SOD activity and GSH levels were not influenced by CoQ(10) supplementation (Fig. 4, Tab. 1, Ref. 69). Full Text in PDF www.elis.sk.
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    Effects of treatment with coenzyme Q(10) on exercised rat aorta
    (AKADEMIAI KIADO ZRT, 2012) Okudan, Nilsel; Atalık, Kısmet Esra Nurullahoğlu; Revan, S.; Belviranlı, Muaz; Balcı, Şükrü Serdar; Gökbel, Hakkı; Pepe, H.
    In this study, the effect of long-term supplementation of coenzyme Q(10) (CoQ(10)) on the responses of swim-trained rat aorta was investigated. Twenty-four adult male Wistar rats were divided into four groups: untrained, trained, untrained+CoQ(10), and trained+CoQ(10) group. In the trained groups rats swam for 60 min/day, five days/week for six weeks. The CoQ(10) supplements were administered by intraperitoneal injection at a daily dose of 10 mg.kg(-1) of body weight five days/week for six weeks. Swimming of the rats was performed in a container containing tap water. Rats were sacrificed and thoracic aortas were removed for ex vivo analysis after the last swimming session. The aortas were cut into rings 2.5 mm in length. Concentration-response curves for phenylephrine (PHE, 10(-9)-3x10(-4) M) and potassium chloride (KCl, 5-100 mM) were isometrically recorded. The sensitivity and maximal responses to PHE and KCl of aortic rings obtained from trained rats were lower than those of untrained rats. CoQ(10) supplementation decreased the responses to both vasoconstrictors in untrained and especially in trained groups. Although neither CoQ(10) nor training did affect malondialdehyde (MDA) and protein carbonyl (PC) levels, creatine kinase (CK) activity decreased and superoxide dismutase (SOD) activity increased only with exercise training. Glutathione (GSH) levels increased in CoQ(10) supplemented-untrained rats. In conclusion, our results suggest that CoQ(10) supplementation may have beneficial effects during exercise.