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Articles by Feraye Esen Gursel
Total Records ( 2 ) for Feraye Esen Gursel
  Feraye Esen Gursel , M. Hanifi Durak and Aysen Altiner
  The aim of the study was to investigate the changes in serum ceruloplasmin levels of ewes fed deficient-energy during late pregnancy. Thirty Chios ewes at 4-6 years of age were used in the study. On day 105 after random mating, the ewes were subjected to ultrasound examination to determine pregnancy. After that they were divided into three groups: Pregnant Normal Energy (PNE, n = 10), Pregnant Deficient Energy (PDE, n = 10) and Non-Pregnant Normal Energy (N-PNE, n = 10). From the mating day up to the day 105, all ewes were fed in according to the ration of N-PNE group. On day 106 of gestation, the animals were begun to be fed the treatment rations. Blood samples were taken from the jugular vein into the tubes before feeding in the morning on days 120, 127, 134, 141 and 148 during gestation. Serum ceruloplasmin levels were not statistically different between groups except day 148. On day 148, serum ceruloplasmin levels in the pregnant deficient group were significantly higher than in the other two groups (p<0.05). They were significantly higher in the pregnant normal energy group than in the non-pregnant normal energy group and were significantly lower in the pregnant normal energy group than in the pregnant deficient group (p<0.05). In the study, serum ceruloplasmin level became a sensitive indicator of feed deficiency in the last days of pregnancy. Thus, variations in this antioxidant in ewes with pregnancy toxemia may be of considerable clinical importance.
  Mehmet C. GUNDUZ , Guven KASIKCI , Ozge TURNA YILMAZ , Sinem O. ENGINLER , Melih UCMAK , Atila ATES , Feraye ESEN GURSEL , Gamze EVKURAN and Merih Duygu TORE
  The aim of this study was to quantitate vascular endothelial growth factor (VEGF) and estradiol-17β in follicular fluid (FF) and serum and to correlate the levels of these substances with oocyte maturation. Transvaginal ultrasound-guided follicular aspirations were performed with the purpose of oocyte collection when the follicle was >35 mm in diameter. The mares were divided into 2 groups according to age, and the changes in VEGF and estradiol-17β in follicular fluid and serum were examined. Levels of estradiol-17β in the follicular fluid and serum of young mares (4-10 years old) did not differ from those in old mares (20-24 years old) (P > 0.05). The follicular fluid and serum concentrations of VEGF in old mares were lower (P < 0.001) than those in young mares. The VEGF levels in young mares did not differ in cases when either mature or intermediate oocytes were collected, whereas its levels in old mares were higher (P < 0.01) when mature oocytes were collected than when intermediate and immature oocytes were collected. Our data suggest that VEGF may play an important role in follicular growth and development, that VEGF levels appear to be age-dependent, and that VEGF levels might be valuable biochemical markers of oocyte maturation.
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