Kisspeptin as a major regulator of reproduction

Funding Activity

Website
http://purl.org/au-research/grants/nhmrc/384124

Funding Status
Closed

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Funded Activity Summary

Reproduction is dependent upon the secretion of gonadotropin releasing hormone (GnRH) from the brain, that stimulates gonadotropin synthesis and release from the pituitary gland. In turn, GnRH and gonadotropin secretion is controlled by feedback effects of gonadal steroids such as estrogen. Various neural systems regulate GnRH cells. Kisspeptin is a recently discovered neuropeptide that appears to play a major role in the regulation of GnRH cells. Because it is newly recognized, the significance of kisspeptin and the relevant receptor, GPR54, is not well defined. This project aims to use our unique combination of abilities to determine the significance of kisspeptin in the regulation of GnRH and gonadotropin secretion. We will study both sheep and monkey brains, measuring gene expression for kisspeptin and GPR54 in a range of physiological states and we will determine how kisspeptin acts on GnRH cells. We will determine whether kisspeptin plays a role in the feedback effects to GnRH cells. Effects on the pituitary gland will also be studied. We will use sheep models to measure kisspeptin effects on GnRH secretion, because this cannot be done in the monkey or the rodent. We will examine the function of kisspeptin and GPR54 in relation to puberty. We will also use a model of puberty (seasonal breeding in the sheep) to determine whether activation and quiescence of the reproductive system is related to the function of kisspeptin and GPR54. This work will define the role of kisspeptin in the regulation of reproduction.

Funded Activity Details

Start Date: 01-01-2006

End Date: 01-01-2008

Funding Scheme: NHMRC Project Grants

Funding Amount: $483,142.00

Funder: National Health and Medical Research Council

Research Topics

ANZSRC Field of Research (FoR)

Systems Physiology

ANZSRC Socio-Economic Objective (SEO)

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Other Keywords

Endocrinology | Hypogonadism | Hypogonadotrophic Hypogonadism | Hypothalamus | Infertility | Neuroendocrinology | Neuromodulation | Reproduction | Reproductive Endocrinology | Sexual Development

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