Abstract

A single intraperitoneal injection of cadmium chloride (CdCl 2, 0.32 mg/kg body weight) was administered to 15 adult female palm squirrels ( Funambulus pennanti (Wroughton)) and the hypothalamic 5-hydroxytryptamine (5-HT), noradrenaline (NA) and dopamine (DA) levels were quantified on the 1st, 7th and 40th day. 5-HT levels significantly decreased on the 1st and 40th day but showed an increase on the 7th day. Similarly, NA levels significantly decreased after 1, 7 and 40 days of treatment, and DA levels decreased on the 1st and 7th day but insignificantly increased on the 40th day. This suggests that CdCl 2 interferes in the functioning of the hypothalamo-hypophyseal axis by impairing the hypothalamic 5-HT, NA and DA levels, which may in turn affect the physiology of the peripheral endocrine glands.

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