Abdülkerim Baltaci

Publications (2)2.59 Total impact

• Source

  Available from: nel.edu

  Article: Serum leptin concentration and anaerobic performance do not change during the menstrual cycle of young females.

  Nilsel Okudan, Hakki Gökbel, Kağan Uçok, Abdülkerim Baltaci
  [show abstract] [hide abstract]
  ABSTRACT: It was aimed to determine whether there was a difference in the leptin levels and short term exercise performance during the menstrual cycle of the young females who had normal menstrual cycle and no pregnancy story. Fifteen sedentary females aged 19-23 yrs were included. All had regular menstrual cycle of 28-30 days and no pregnancy story. Blood samples were taken for the analysis of serum estradiol, progesterone and leptin levels and Wingate test was applied on a Monark 818E ergometer with 75 g/kg load on the 7th, 14th and 21st cycle days, randomly. The differences in serum leptin levels and peak power, mean power and fatigue index during these days and the correlations between serum leptin and FSH, LH, estradiol and progesterone levels were not significant. We concluded that performance in a short intense exercise which require high motivation is not affected by menstrual cycle and in young females with normal menstrual cycle, serum leptin concentration does not change during the cycle. Further studies constituting more standard groups, controlling food intake, timing the blood sampling, studying more days of menstrual cycle will help to obtain more accurate results.
  Neuro endocrinology letters 09/2005; 26(4):297-300. · 1.30 Impact Factor
• Article: Influence of hypovolemic and hypertonic treatments on plasma vasopressin levels and fluid balance in the propylthiouracil-induced hypothyroid rat.

  Rasim Mogulkoç, Abdülkerim K. Baltaci, Bayram Yilmaz, Haluk Kelestimur
  [show abstract] [hide abstract]
  ABSTRACT: This study was undertaken to investigate the effects of hypovolemic and hypertonic treatments on plasma vasopressin (AVP) levels and fluid balance in propylthiouracil (PTU)-induced hypothyroidism in the rat. The influence of hypothyroidism on AVP responsiveness to hypertonic and hypovolemic stimuli were compared. Adult male rats were divided into two groups. Groups I and II were intraperitoneally (i.p.) injected with saline (1ml/250g) and PTU (10mg/kg/day), respectively, for a period of two weeks. These groups were further divided in three subgroups each containing six rats. The first subgroup consisted of unchallenged rats. I.P. 700 mg polyethylene glycol was used for hypovolemic treatment. The third subgroup consisted of hypertonic (1.5 M NaCl; 1ml/100 g) stimulated animals. All rats were decapitated and trunk blood collected in hep-arinized tubes. Plasma samples were stored at -20 degrees C until assayed. Plasma AVP, T3 and T4 levels were measured by radioimmunassay. Hematocrit values and plasma Na concentrations were also determined. In the PTU-induced hypothyroid rats, hypertonic treatment caused lower increase in plasma AVP levels (p<0.05) compared to the respective control animals. In the hypovolemic group, decreases in AVP responses were not found to be statistically significant. In conclusion, although hypothyroidism does not statistically change basal AVP levels, it may affect AVP response to hypertonic stimulus. It is not clear whether changes in fluid-electrolyte balance cause disturbance in AVP release in hypothyroidism or vice versa. Therefore, these preliminary findings need to be confirmed by further investigations.
  Neuro endocrinology letters 02/1999; 20(5):311-314. · 1.30 Impact Factor