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Proteomic profiling of the hypothalamic arcuate nucleus of bull calves offered either a high or moderate plane of nutrition in early life

ABSTRACT: Enhanced nutrition during the early calfhood period has been shown to hasten the onset of puberty in bull calves. The hypothalamic-pituitary-ovarian biochemical signalling axis regulates reproductive development in bulls, with the dynamics of the arcuate nucleus region of the hypothalamus, in particular, central to mediating the relationship between metabolic status with reproductive development. However, the precise molecular mechanisms regulating the influence of metabolic status on this signalling axis in bull calves is yet to be fully elucidated. The objective of this study was to determine the effect of an enhanced plane of nutrition during early life, up to 12 weeks of age, on the proteomic profile of the arcuate nucleus of bull calves. Bull calves were offered either a high or moderate plane of nutrition.

INSTRUMENT(S): Q Exactive HF

ORGANISM(S): Bos Taurus (bovine)

TISSUE(S): Brain

SUBMITTER: Tara Carthy

LAB HEAD: David Kenny

PROVIDER: PXD055939 | Pride | 2025-04-22

REPOSITORIES: Pride

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			Action	DRS
	20191001_002_S204104_A37824_Group_1.raw	Raw
	20191001_003_S204107_A81983_Group_1.raw	Raw
	20191001_004_S204118_A41971_Group_2.raw	Raw
	20191001_005_S204111_A77860_Group_1.raw	Raw
	20191001_007_S204119_A61965_Group_2.raw	Raw

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Proteomic profiling of anterior pituitary of bull calves offered either a high or moderate plane of nutrition in early life

Project description:Enhanced nutrition during the early calfhood period has been shown to hasten the onset of puberty in bull calves. The hypothalamic-pituitary-ovarian biochemical signalling axis regulates reproductive development in bulls, with the dynamics of gonadotropin pulsatility within the anterior pituitary gland, in particular, central to final sexual maturity. However, the precise molecular mechanisms regulating the influence of metabolic status on this signalling axis in bull calves is yet to be fully elucidated. The objective of this study was to determine the effect of an enhanced plane of nutrition during early life, up to 12 weeks of age, on the anterior pituitary gland proteome of bull calves. Bull calves were offered either a high or moderate plane of nutrition.

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Effect of enhanced early life nutrition on the hypothalamic arcuate nucleus transcriptome of bull calf

Project description:This study evaluated the effect of enhanced dietary intake during the early life period on hypothalamic arcuate nucleus transcriptome in bull calves. Between 2-12 weeks of age bull calves were offered either a high (HI; n=15) or moderate (MOD; n=15) plane of nutrition, with diets designed to evoke growth rates of 1.0 and 0.5 kg/day, respectively. At 12 wk of age, arcuate nucleus tissue samples were harvested from all calves and subsequently subjected to mRNAseq.

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Proteomic analysis underlying the impact of early life nutrition on the molecular control of testicular development in the young bull calf.

Project description:It has been established that enhanced early life nutrition progresses sexual development in the bull calf through neuroendocrine signalling via the hypothalamic-pituitary-testicular axis. However, the underlying molecular mechanisms regulating this process have not been fully elucidated. This study measured the impact of contrasting feeding regimes in the first 12 wk of life, known to impact age at puberty, on the proteomic landscape of the testes of bull calves. Holstein bull calves with a mean (±SD) bodyweight and age of 48.8 (± 5.3) kg and 17.5 (± 2.8) days, were designated to high (HI; n=10) or moderate (MOD; n=10) dietary groups, with diets designed to provoke growth rates of 1.0 and 0.5 kg/day, respectively. At 12 wk of age, all calves were euthanized, and testes parenchyma harvested. HI calves were heavier at slaughter (112.4 v 88.7 (2.98) kg, P<0.001), and had a greater average daily gain (ADG) of (0.88 v 0.58 kg, P<0.001). The turquoise network from the protein analyses contained the protein CDH13 which is involved in testes development. Gene ontology analysis of the turquoise network revealed enrichment of genes with functions related to cholesterol biosynthesis, IGF-1 signalling, insulin receptor/secretion signalling, androgen signalling and Sertoli cell junction signalling.

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2018-04-12 | GSE97673 | GEO

Effect of early-life plane of nutrition on the transcriptional profile of the hypothalamic arcuate nucleus region in heifer calves

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