Supra Renal Biological Lateralization in Albino Rats

Document Type : Original Article

Authors

1 Physiology Dept., Faculty of Medicine, Al-Azhar University

2 Physiology Dept., Faculty of Medicine, El-Minia University

Abstract

In order to shade light on adrenal biological lateralization and its relation to age,
sex, stressful condition and circadian rhythm, the present work was done on 12
groups of rats of both sexes (6 rats in each). These groups were classified according
to age (young and adults), sex, condition (non-stress and cold restraint stress) and
time of the day (9 am and 9 pm). All animals were anaethetized, dissected to get
suprarenal gland on- both sides- out of the abdomen. The glands were weighted, their
catecholamines and serotonin were determined by using the spectrofluorophotometer.
The resultsrevealed a significant left lateralization of the gland weight and with right
lateralization of its hormones in adult rats. Stress did not affect this lateralization.
Also, the results showed a significant suprarenal medullary hormones lateralization
in female rats compared with the male ones, with circadian lateralization of adult
female rats. Data of the present study will open the door for further study, research
and investigation about the role of supra-renal biological lateralization on stress
developing disease, the role of supra-renal biological lateralization on age & sex
related response to stress and also, circadian relation to stress response.

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