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Lipid–zinc interaction: its effect on the testes of mice

Published online by Cambridge University Press:  09 March 2007

S. K. Taneja
Affiliation:
Department of Zoology, Panjab University, Chandigarh-160 014, India
S. Chadha
Affiliation:
Department of Zoology, Panjab University, Chandigarh-160 014, India
P. Arya
Affiliation:
Department of Zoology, Panjab University, Chandigarh-160 014, India
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Abstract

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Lipid-Zn interaction in the testes of mice was studied by feeding them low-fat (30 g maize oil/kg; group LFZD) and high-fat (90 g maize oil/kg; group HFZD) Zn-deficient diets for 6 weeks. The results were compared with those of corresponding Zn-supplemented-diet-fed controls (groups LFZS and HFZS). The integument-related Zn-deficiency symptoms appeared in group HFZD and not in group LFZD mice despite lack of Zn in their ration and an equal level of Zn in their blood serum. The feed intake, gain in body weight and testes weight of the LFZD group were comparable with those of the LFZS and HFZS groups (P < 0·05) but were higher than those of the group HFZD (P <·05). The testes of group HFZD displayed necrotic changes marked by the presence of giant cells, lower RNA, DNA and protein concentrations and higher phospholipid and cholesterol levels than those of mice in the LFZD group. The concentrations of these fractions were not significantly different between LFZD and HFZS. The results do not support the hypothesis that Zn is essential either for testicular function or for nucleic acid and protein synthesis in animals fed on a low-fat diet; however, it appears to be essential for animals fed on a high-fat diet. The changes observed in the testes of the HFZD animais suggest the excess intake of fat as their cause in Zn-deficient animals.

Type
Effects of dietary zinc deficiency
Copyright
Copyright © The Nutrition Society 1995

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