Induction of out-of-season egg laying by artificial photoperiod in Yangzhou geese and the associated endocrine and molecular regulation mechanisms

Zhu, Hongbo; Shao, Xibing; Chen, Zhe; Wei, Chuankun; Lei, Mingming; Ying, Shijia; Yu, Jianning; Shi, Zhen‐Dan

doi:10.1016/j.anireprosci.2017.03.009

Cited by 24 publications

(19 citation statements)

References 46 publications

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“…Actually, in the context of laying hens, although studies have shown the altered impact of heat stress on steroid hormone synthesis in vivo [ 40 ], the influence of heat stress on steroid hormone synthesis in vitro has never been researched. In addition, tests on the action of heat stress on steroidogenic gene expression in vitro were previously only conducted in ducks [ 24 ]. Therefore, our study is the first to show the effects of heat stress both on steroid hormone synthesis and the expression of the related genes in hen follicular GCs in vitro.…”

Section: Discussionmentioning

confidence: 99%

“…Estradiol (E2) and progesterone (P4) concentrations in the culture medium were determined by enzyme-linked immunosorbent assay using the ELISA Quantitative Diagnostic Kit for estradiol or progesterone (North Institute of Biological Technology, Beijing, China). The methods used are described in our previous study [ 24 ]. The intra- and inter-assay variation coefficients (CV) for E2 were 15%, while the intra- and inter-assay CV for P4 were both under 10%.…”

Section: Methodsmentioning

confidence: 99%

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Effect of Heat Stress on Egg Production, Steroid Hormone Synthesis, and Related Gene Expression in Chicken Preovulatory Follicular Granulosa Cells

Yan

et al. 2022

Animals

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This study was conducted to elucidate the molecular mechanisms underlying heat stress (HS)-induced abnormal egg-laying in laying hens. Hy-Line brown laying hens were exposed to HS at 32 °C or maintained at 22 °C (control) for 14 days. In addition, granulosa cells (GCs) from preovulatory follicles were subjected to normal (37 °C) or high (41 °C or 43 °C) temperatures in vitro. Proliferation, apoptosis, and steroidogenesis were investigated, and the expression of estrogen and progesterone synthesis-related genes was detected. The results confirmed that laying hens reared under HS had impaired laying performance. HS inhibited proliferation, increased apoptosis, and altered the GC ultrastructure. HS also elevated progesterone secretion by increasing the expression of steroidogenic acute regulatory protein (StAR), cytochrome P450 family 11 subfamily A member 1 (CYP11A1), and 3b-hydroxysteroid dehydrogenase (3β-HSD). In addition, HS inhibited estrogen synthesis in GCs by decreasing the expression of the follicle-stimulating hormone receptor (FSHR) and cytochrome P450 family 19 subfamily A member 1 (CYP19A1). The upregulation of heat shock 70 kDa protein (HSP70) under HS was also observed. Collectively, laying hens exposed to high temperatures experienced damage to follicular GCs and steroidogenesis dysfunction, which reduced their laying performance. This study provides a molecular mechanism for the abnormal laying performance of hens subjected to HS.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effect of Heat Stress on Egg Production, Steroid Hormone Synthesis, and Related Gene Expression in Chicken Preovulatory Follicular Granulosa Cells

Yan

et al. 2022

Animals

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“…Present results partially correspond with obtained by Péczely et al [ 7 , 13 ] in which THs were relatively low in the spring but increased to high levels in the summer. More recently Zhu et al [ 16 ] reported that patterns of THs levels in long-day breeding Chinese ganders changed in a reciprocal fashion to that of T. On the other hand, in female geese [ 15 ] no relationship was found between T4 and reproductive activities, but T3 levels were high under initial reproduction and photorefractoriness. However, it must be emphasised that in research in short-day breeding Magang ganders [ 17 ], there was no marked seasonal differences in T3 level.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies indicate that modulation of PRL with dopamine agonist [ 49 ] and blockage of serotonin synthesis [ 32 ] may enhance the reproductive efficiency of domestic hens. Also, using different photoperiod stimulation in the breeding–laying period like in the study by Zhu et al [ 15 ] may be considered in future work on Zatorska geese.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, Péczely et al [ 7 ] showed the level of gonadal and adrenal steroids and THs in commercial crosses of European geese. Also, in a previous study, patterns of chosen hormones connected with reproduction in long-day breeding Chinese geese kept in natural [ 14 ] or different controlled photoperiod conditions [ 15 , 16 ] were noted. Additionally, endocrine mechanisms of seasonal reproduction with circulating hormone changes in short-day Chinese geese were investigated [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Determination of Annual Plasma Hormone Levels Associated with Reproduction in Long-Day Breeding Domestic Geese

Gumułka

Avital-Cohen

Rozenboim

2021

Animals

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This paper examines the dynamics of circulating hormone changes connected with reproduction in geese during the annual period related to gonad morphometry. One hundred geese were examined. The levels of prolactin (PRL), triiodothyronine (T3), thyroxine (T4), testosterone (T), progesterone (P4) and estradiol (E2) were estimated. In both sexes, PRL level patterns fit a quadratic trend with elevations in the post-breeding and the second half of the breeding–laying periods. During these periods, differences in the PRL level between sexes were noted. In ganders, increased PRL levels during the laying period occurred earlier compared to in female geese. Cubic trends for T and E2 in ganders and quadratic for T, P4, and E2 in female geese were observed. PRL was negatively correlated with T in both sexes and with P4 and E2 in female geese. A higher level of T3 and variation in T4 in ganders with a quartic trend in ganders vs. a quadratic in female geese were noted. Patterns of PRL, T, and E2 suggested that the breeding–laying period in ganders may be shorter than in female geese. These findings will be used to explore experimental manipulations of the endocrine axis to increase synchronisation of both sexes.

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Analyses of mathematical models for Yangzhou geese egg-laying curves

Guo

Zhao

Shao

et al. 2019

Animal Reproduction Science

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Induction of out-of-season egg laying by artificial photoperiod in Yangzhou geese and the associated endocrine and molecular regulation mechanisms

Cited by 24 publications

References 46 publications

Effect of Heat Stress on Egg Production, Steroid Hormone Synthesis, and Related Gene Expression in Chicken Preovulatory Follicular Granulosa Cells

Effect of Heat Stress on Egg Production, Steroid Hormone Synthesis, and Related Gene Expression in Chicken Preovulatory Follicular Granulosa Cells

Determination of Annual Plasma Hormone Levels Associated with Reproduction in Long-Day Breeding Domestic Geese

Analyses of mathematical models for Yangzhou geese egg-laying curves

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