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Supplementation of various zinc sources modify sexual development and testicular IGF family gene expression in pre-pubertal male Japanese quail.

07:00 EST 3rd March 2020 | BioPortfolio

Summary of "Supplementation of various zinc sources modify sexual development and testicular IGF family gene expression in pre-pubertal male Japanese quail."

Zinc plays an important role in the regulation of insulin-like growth factor-I (IGF-I). IGF system, in turn, has a key role in the development and functions of the reproductive organs. This research was performed to investigate the effects of different sources of zinc on IGF-I gene expression and testicular development in pre-pubertal male Japanese quail. A total of 512 unsexed day-old Japanese quail chicks were randomly divided into 16 groups (4 dietary treatments × 4 replicates) and kept for 35 days. The control group diet was not supplemented with zinc whereas the diets of three groups were supplemented with 25 mg kg zinc oxide (ZnO), zinc oxide nanoparticle (ZnON), and zinc-methionine (Zn-Met). On days 28 and 35, one birds from each subgroup were weighed, bled, and euthanized to evaluate gonado-somatic index (GSI), testicular histology, serum testosterone concentration, cloacal gland index (CGI), and the testicular IGF family gene expression. The results showed that GSI was higher in ZnON (2.307) than control (1.619) on day 35 (P < .05). Germinal epithelium thickness was higher in ZnON (78.88 μm) and Zn-Met (79.73 μm) than control (67.73 μm) on day 35 (P < .05). On day 35, the testosterone concentration was lowest in the control (5.830 ng/ml, P < .05). The CGI of 35-day-old birds was higher in Zn-Met (411.28) than the control (307.59, P < .05). IGF-IR mRNA expression was highest in Zn-Met group on day 28. Therefore, supplementation of diet with Zn-methionine is superior to other sources of zinc for diet supplementation in immature Japanese quail.

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This article was published in the following journal.

Name: Research in veterinary science
ISSN: 1532-2661
Pages: 87-92

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