Effects of Sulfamethazine on Induction of Precocious Puberty in Japanese Quails (Coturnix japonica) Assessed through Monitoring the Hormonal Changes and Gonadal Development
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概要
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To investigate the effect of dietary supplementation of sulfamethazine (SMZ) on growth performance, gonadal development and hormonal changes, male and female Japanese quails (Coturnix japonica) were fed a control diet with or without SMZ (0.2%) from one day post hatching until 6 weeks of age. In male quail, the deviation in growth performance between SMZ and control chicks started at the 3rd week, and the disparity was significant at the 5th and 6th weeks. Hormonal analysis revealed a substantial increase in the pituitary and circulating LH (at the 5th and 6th weeks), testicular and circulating testosterone (at the 6th week) and plasma ir-inhibin (at 5th week) levels following feeding of the diet containing SMZ. The testicular size and weights were significantly larger at the 5th week, and histological analysis demonstrated an enlargement of seminiferous tubules, filling of the luminal fluid with spermatozoa and a number of interstitial cells. In female quail, the body and ovarian weights were considerably increased at the 6th week. The SMZ supplemented group showed a significant elevation in pituitary LH content (from the 4th week), plasma LH (at the 5th and 6th weeks), ir-inhibin (at the 3rd and 6th week) and progesterone (at the 2nd, 5th and 6th weeks) as compared with control chicks. These results indicated that SMZ was able to stimulate the secretion of gonadotropins and accordingly the gonadal hormones and that was associated with an early gonadal function in male (at the 5th week) and female (at the 6th week) Japanese quail.
- 日本繁殖生物学会の論文
著者
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Weng Qiang
College Of Biological Science And Technology Beijing Forestry University
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Kandiel Mohamed
東京農工大学 農学部獣医学科獣医生理学
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SEDQYAR Manila
College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
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KANDIEL Mohamed
Department of Theriogenology, Faculty of Veterinary Medicine, Benha University, Qaliobia, Egypt
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NAGAOKA Kentarou
College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
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WATANABE Gen
College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
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TAYA Kazuyoshi
College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
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