Biochemical, Histopathological and Immunohistochemical study of the
repeated environmental toxicant Ultra Violet B radiations induced
Hyperthyroidism alleviates oxidative stress and prevented by Naringin in
male Swiss albino mice
Abstract
Global warming rise has been observed as a result of ozone layer
destruction, which makes it possible for UVB radiation to pass through
atmosphere and kill people. It is believed that daily exposure to UVB
radiation has biological effects on both humans and other living things.
Concerning effect of UVB radiations, we examine the instinctive
mechanism by which a specific amount of radiation induces oxidative
stress and hyperthyroidism, which is further controlled by the
antioxidant activity of Naringin (NG), due to the detrimental effects of
UVB radiation on the biological system. For these examinations
twenty-four adult male albino mice were divided into four equal groups;
control group, UVB exposed group (2 hrs/day), UVB+NG treated group (80
mg/kg b.w), and NG-treated group. Doses were given orally, daily for 15
consecutive days. Specimens of the thyroid gland were processed for
hormonal, biochemical, histological, immunohistochemical and
immunofluorescence examinations. A morphometric study and statistical
analysis of the findings were performed for different groups. Compared
to the control group, the specimens of the UVB exposed mice showed
alteration in mean height of the thyroid follicular epithelial cells and
caspase-3, NOS-2 and THRβ-1 expression. In contrast, naringin prevent
the changes caused due to repeated UVB radiations.