Volume 23 (5):363-375, 2019.
Serum cortisol, histology, adiposity and morphometrics of rabbit adrenals excised in summer versus winter.
Amer M Hussin1 and Mudhafar K Hashim2
1University College of Belad Al-Rafidain- Diyala, 2College of Veterinary Medicine- Baghdad University, Iraq
Hussin AM, Hashim MK., Serum cortisol, histology, adiposity and morphometrics of rabbit adrenals excised in summer and winter, Onl J Vet Res., 23 (5):363-375, 2019. Iraq suffers extreme seasonal variations with summer temperatures reaching ~47C and winter ~0C. We determined differences in adrenal histology, white and brown fat and blood cortisol in groups of 12 rabbits kept at ambient average summer temperatures of (August ~39C) versus winter (January ~0C). By oculometry we determined that adrenal capsules excised during winter, were ~39% (µm) and Zona glomerulosa (µm) ~58% thinner (P < 0.05) but Zona fasciculata ~39% and medulla ~15% thicker (P < 0.05). Serum cortisol (n=12) was ~55% lower (P < 0.05) in rabbits during winter. Adipose tissue in adrenals was about 50% less in winter samples but with more brown fat and mitochondria.
Key words: Adrenal, histology, adipose tissue, cortisol, seasonal, Raw data provided.