بررسی تغییرات فصلی غلظت تستوسترون سرم در گربه‌های نر منطقه اهواز

نوع مقاله: علمی پژوهشی

نویسندگان

1 استاد گروه علوم درمانگاهی، دانشکده دامپزشکی، دانشگاه شهید چمران اهواز، اهواز، ایران.

2 استاد گروه علوم پایه، دانشکده دامپزشکی، دانشگاه شهید چمران اهواز، اهواز، ایران.

3 دانش‌آموخته دکترای حرفه‌ای دامپزشکی، دانشکده دامپزشکی، دانشگاه شهید چمران اهواز، اهواز، ایران.

چکیده

دمای محیط و طول روز، از جمله فاکتورهای مهمی هستند که ممکن است سیکل تولیدمثلی گونه­های مختلف را تحت تاثیر قرار دهند. هدف از انجام مطالعه حاضر، ارزیابی اثر فصول مختلف (سرد=­دی و گرم=­تیر) و نیز حدواسط بین آن‌ها (فروردین و مهر) بر غلظت تستوسترون سرم، در گربه­های منطقه اهواز بود. بدین منظور، 120 قلاده گربه نر بالغ و از نژاد موکوتاه اهلی مورد بررسی قرار گرفت. در هر فصل، خون­گیری از 30 قلاده گربه انجام گرفته و غلظت تستوسترون در نمونه­های سرمی، به­روش الایزا (ELISA) اندازه­گیری شد. میانگین غلظت تستوسترون در گربه­های مورد مطالعه، ng/ml 49/0±42/3 به­دست آمد. همچنین حداقل و حداکثر غلظت سرمی تستوسترون ­هم به­ترتیب ng/ml01/0 و 2/17 و مربوط به ماه­های تیر و دی محاسبه گردید. پایین­ترین میزان میانگین غلظت تستوسترون در فصل گرم (ng/ml 23/0±62/0) و بیشترین میزان آن در فصل سرد به­دست آمد (ng/ml 28/1±87/9). میانگین غلظت تستوسترون در فصول بهار و پاییز هم، به­ترتیب ng/ml 5/0±26/2 و 3/0±94/0 ثبت شد. دمای محیط و طول روز، به­شکل منفی با غلظت تستووسترون ارتباط داشتند. ضریب همبستگی بین غلظت تستوسترون با میانگین دمای کمینه، بیشینه و کلی هم به­ترتیب برابر با 572/0R= -، 615/0R= -و 597/0R= -بود. همچنین ضریب همبستگی بین غلظت تستوسترون و طول روز (256/0R= -)، نشان‌دهنده وجود همبستگی قابل قبول و بالا از نوع منفی (معکوس) بود. نتیجه نهائی این­که مقادیر تستوسترون سرم، تحت تأثیر فصل قرار داشته، به­طوری ­که میانگین غلظت تستوسترون در تابستان به­شکل معنی‌داری نسبت به سایر فصول، پایین­تر بود (05/0>p)

کلیدواژه‌ها


عنوان مقاله [English]

A survey on seasonal changes of serum testosterone concentration in male cats of Ahvaz region

نویسندگان [English]

  • Bahman Mosallanejad 1
  • Saad Gooraninejad 1
  • Seyed Reza Fatemi Tabatbaei 2
  • Amir Ghasemi Ghasemvand 3
1 Professor, Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
2 Professor, Department of Basic Science, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
3 D.V.M. Graduate, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
چکیده [English]

Environmental temperature and photoperiod are among the important factors that may influence the reproductive cycle of various species. The aim of the present survey was to evaluate the different seasonal influences (cold= January and warm= July) and their intermediate seasons (April and October) on serum testosterone concentration in cats of Ahvaz region. For this purpose, one hundred and twenty adult male cats (domestic short hair breed) were examined. Blood samples were taken of thirty cats in each season, and testosterone concentration was measured using ELISA technique in serum samples. The average testosterone concentration of 3.42±0.49 ng/ml was detected in the studied cats. The minimum and maximum of serum testosterone level was also 0.01 and 17.2 ng/ml, in July and January respectively. The minimum of mean testosterone concentration was obtained in the warm season (0.62±0.23 ng/ml), while the maximum mean level was detected in the cold season (9.87±1.28 ng/ml). The mean testosterone concentration in spring and autumn was 2.26±0.5 and 0.94±0.3 ng/ml respectively. Environmental temperature and photoperiod correlated negatively with the testosterone concentration. The correlation coefficient between testosterone concentration with the average of minimum, maximum and total temperature, was calculated as R= -0.572, R= -0.615 and     R= -0.597 respectively. The correlation coefficient indicated an acceptable and high correlation of the negative (inverse) type, between testosterone concentration and photoperiod (R= -0.256). In conclusion, testosterone concentration is under the influence of season, with the mean testosterone concentration significantly lower in summer than the other seasons (p<0.05). 

کلیدواژه‌ها [English]

  • Testosterone
  • Serum
  • Season
  • Cat
  • Ahvaz

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