Changes in progesterone receptor isoforms expression and in the morphology of the oviduct magnum of mature laying and aged nonlaying hens

González-Morán, María Genoveva

doi:10.1016/j.bbrc.2016.08.071

Cited by 18 publications

(11 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Stressful situations experienced by the bird have been shown to decrease reproductive hormones (Henriksen et al 2011). In addition, the decreased levels of E2, LH, FSH, and progesterone in plasma of laying hens subjected to thermal stress were associated with decreased egg production (Elnagar et al 2010;González-Morán 2016). In the present study, high stocking density decreased plasma E2 and FSH concentrations of laying ducks, which is consistent with the findings in laying performance, implying that laying ducks kept at high stocking density suffered a considerable stress.…”

Section: Reproductive Hormonessupporting

confidence: 89%

Effects of stocking density on performance, egg quality, reproductive hormones, and antioxidant capacity in egg-laying ducks

Xiong

Yang

Jiang

et al. 2020

Journal of Applied Animal Research

View full text Add to dashboard Cite

This study was conducted to evaluate the effects of stocking density on productive performance, egg quality, and antioxidant capacity in laying ducks. A total of 720 20-week-old Jinding laying ducks were randomly assigned to 5 stocking densities (4, 5, 6, 7, and 8 birds/m 2 ) with 8 replicate pens each treatment. The results showed that increasing stocking density linearly increased egg production and egg mass and linearly decreased FCR of laying ducks (P < 0.05). The eggshell strength and thickness decreased linearly (P < 0.05) and quadratically (P < 0.05) with an increase in stocking density. Increased stocking density linearly decreased concentrations of estradiol-17β and follicle-stimulating hormone, activities of superoxide dismutase, glutathione peroxidase, and total antioxidant capacity in plasma (P < 0.05), but linearly increased plasma and hepatic malondialdehyde content (P < 0.05). The results suggested that high stocking density adversely influenced laying performance and egg quality of ducks, which is associated with impaired antioxidant capacity. Under our experimental conditions, we recommend that the stocking density of laying ducks should be kept to 4 or fewer birds/m 2 to avoid the negative effects of high stocking density on performance and egg quality of laying ducks.

show abstract

Section: Reproductive Hormonessupporting

confidence: 89%

Effects of stocking density on performance, egg quality, reproductive hormones, and antioxidant capacity in egg-laying ducks

Xiong

Yang

Jiang

et al. 2020

Journal of Applied Animal Research

View full text Add to dashboard Cite

show abstract

“…It is reported that IGF-1 can stimulate the secretion of steroids by theca cells [32], thereby improving the synthesis of ovalbumin [33] and the quality of eggshell by promoting the development of oviduct [34].…”

Section: A C C E P T E D a R T I C L Ementioning

confidence: 99%

Effects of dietary supplementation of herbal active ingredients promoting insulin-like growth factor-1 secretion on production performance, egg quality, blood hematology, and excreta gas emission in laying hens

2021

View full text Add to dashboard Cite

Objective: The purpose of this study was to evaluate the effects of supplementing herbal active ingredients (YGF251) which can promote the secretion of insulin-like growth factor-1 (IGF-1) in the diet on production performance, egg quality, blood hematology, and excreta gas emission in laying hens. A c c e p t e d A r t i c l eMethods: A total of 288 ISA Brown (41-week-old) laying hens with an initial body weight of 1.83 ± 0.68 kg were randomly assigned to 1 of 4 dietary treatments in a randomized block design based on body weight.Each treatment had replicate cages having 6 adjacent cages per replicate (hens are kept in cages alone). The experimental period was 35 days. Dietary treatments were based on the corn-soybean meal-wheat-based basal diet and supplemented with 0.00, 0.05, 0.10, or 0.15 % YGF251.Results: The linear increased egg weight in weeks 1 to 5 (P < 0.05), egg mass in week 1 (P < 0.05) and weeks 1 to 5 (P < 0.05), egg strength on day 7 (P < 0.05), 21 (P < 0.01), and 35 (P < 0.01), eggshell thickness on day 21 (P < 0.05) and 35 (P < 0.01), haugh unit on day 21 (P < 0.01) and 35 (P < 0.05), serum IGF-1 concentration on day 21 (P < 0.05) and 35 (P < 0.01), and serum total protein concentration on day 35 (P < 0.05) were observed with the supplementing YGF251 increased in the diet, while feed conversion ratio in weeks 1 to 5 (P < 0.05) and excreta ammonia emission (P < 0.01) decreased linearly with the dose of YGF251 increased.Conclusion: Dietary supplementation of YGF251 positively affected the production performance and egg quality of laying hens through increasing serum IGF-1 concentration in a dose-dependent manner.Moreover, YGF251 supplementation improved barn environment by reducing excreta noxious gas emission.

show abstract

“…In the magnum (the part of the oviduct responsible for egg white deposition), progesterone signalling is necessary for the secretion of key components of the egg white, ovalbumin and avidin (Sah & Mishra, 2018). Loss of progesterone receptors in the oviduct is associated with ageing in hens, and post‐laying hens lose progesterone receptor isoforms from every oviductal cell type (González‐Morán, 2016). Progesterone receptors have also been identified in alligators (Vonier, Guillette, McLachlan, & Arnold, 1997) and turtles, where progesterone reduces uterine contractions (Giannoukos & Callard, 1996).…”

Section: Assessing the Role Of Novel Interaction In The Evolution Of The Placentamentioning

confidence: 99%

Novel tissue interactions support the evolution of placentation

Griffith

2021

Journal of Morphology

View full text Add to dashboard Cite

Organ development occurs through the coordinated interaction of distinct tissue types. So, a question at the core of understanding the evolution of new organs is, how do new tissue-tissue signalling networks arise? The placenta is a great model for understanding the evolution of new organs, because placentas have evolved repeatedly, evolved relatively recently in some lineages, and exhibit intermediate forms in extant clades. Placentas, like other organs, form from the interaction of two distinct tissues, one maternal and one fetal. If each of these tissues produces signals that can be received by the other, then the apposition of these tissues is likely to result in new signalling dynamics that can be used as a scaffold to support placenta development. Using published data and examples, in this review I demonstrate that placentas are derived from hormonally active organs, that considerable signalling potential exists between maternal and fetal tissues in egg-laying vertebrates, that this signalling potential is conserved through the oviparity-viviparity transition, and that consequences of these interactions form the basis of derived aspects of placentation including embryo implantation. I argue that the interaction of placental tissues, is not merely a consequence of placenta formation, but that novel interactions form the basis of new placental regulatory networks, functions, and patterning mechanisms.

show abstract

Changes in progesterone receptor isoforms expression and in the morphology of the oviduct magnum of mature laying and aged nonlaying hens

Cited by 18 publications

References 31 publications

Effects of stocking density on performance, egg quality, reproductive hormones, and antioxidant capacity in egg-laying ducks

Effects of stocking density on performance, egg quality, reproductive hormones, and antioxidant capacity in egg-laying ducks

Effects of dietary supplementation of herbal active ingredients promoting insulin-like growth factor-1 secretion on production performance, egg quality, blood hematology, and excreta gas emission in laying hens

Novel tissue interactions support the evolution of placentation

Contact Info

Product

Resources

About