کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8404923 | 1544736 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Corticosterone in ovo modifies aggressive behaviors and reproductive performances through alterations of the hypothalamic-pituitary-gonadal axis in the chicken
ترجمه فارسی عنوان
کورتیکواسترون در تخم مرغ رفتارهای تهاجمی و عملکرد تولید مثل را از طریق تغییرات محور هیپوتالاموس-هیپوفیز گناد در مرغ تغییر می دهد
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کلمات کلیدی
رفتار - اخلاق، مرغ، کورتیکواسترون، تخم مرغ، تخمدان،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
Exposure to excess glucocorticoids during embryonic development affects offspring reproduction and suppresses the hypothalamic-pituitary-gonadal (HPG) axis in mammals. However, whether corticosterone (CORT) causes similar effects in the chicken remains unclear. In the present study, we injected low (0.2 μg) and high (1 μg) doses of CORT in ovo before incubation and detected changes in aggressive behavior, tonic immobility (TI), reproductive performances, and HPG axis gene expression in posthatch chickens of different ages. High dose of CORT suppressed growth rate from 3 weeks of age, increased the frequency of aggressive behaviors, which was associated with elevated plasma CORT concentration. High-dose CORT significantly (P < 0.05) down-regulated arginine vasotocin (AVT), corticotropin-releasing hormone (CRH), 11β-hydroxysteroid dehydrogenase type 2 (11β-HSD2) and gonadotropin-releasing hormone 1 (GnRH1), while significantly (P < 0.05) up-regulated gonadotropin-inhibitory hormone (GnIH) and 11β-HSD1 mRNA expression in the hypothalamus. Glucocorticoid receptor (GR) and 20-hydroxysteroid dehydrogenase (20-HSD) mRNA levels were not affected by CORT treatment. High-dose CORT significantly (P < 0.05) reduced egg production and egg quality, which was associated with decreased ovary and oviduct weight. Moreover, CORT exposure significantly decreased (P < 0.05) luteinizing hormone (LH) receptor and follicle-stimulating hormone (FSH) receptor mRNA abundance in theca cells of ovarian follicles 1 (F1), F2 and F3. In addition, yolk CORT concentration was significantly higher in eggs laid by hens prenatally exposed to high-dose CORT. Our findings suggest that in ovo administration of CORT programs the aggressive behaviors and reproductive functions in the chicken through alterations of HPG axis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Reproduction Science - Volume 146, Issues 3â4, May 2014, Pages 193-201
Journal: Animal Reproduction Science - Volume 146, Issues 3â4, May 2014, Pages 193-201
نویسندگان
Abdelkareem A. Ahmed, Wenqiang Ma, Yingdong Ni, Song Wang, Ruqian Zhao,