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Neural control of ovulation
12nd Department of Anatomy, Semmelweis Medical University, Budapest, Hungary.
Human Reproduction (Oxford, England)
|January 1, 1988
Summary
The central nervous system regulates pituitary gonadotrophin function through gonadotrophin-releasing hormone (GnRH) pulses. Neurotransmitters and neuropeptides influence GnRH secretion from the hypothalamus.
Area of Science:
- Neuroendocrinology
- Reproductive Biology
- Molecular Endocrinology
Background:
- Pituitary gonadotrophin function is primarily regulated by the central nervous system.
- Sex steroids exert positive and negative feedback on gonadotrophin release.
- Neural control involves two distinct levels of regulation.
Purpose of the Study:
- To describe the neural mechanisms controlling pituitary gonadotrophin function.
- To elucidate the structure and function of the gonadotrophin-releasing hormone (GnRH) precursor protein.
- To identify the brain regions and signaling molecules involved in GnRH secretion.
Main Methods:
- Review of existing literature on neuroendocrine control of reproduction.
- Analysis of the recently described GnRH precursor protein structure.
- Discussion of neurotransmitter and neuropeptide involvement in GnRH regulation.
Main Results:
- GnRH is released in a pulsatile manner from the medial basal hypothalamus.
- The GnRH precursor protein consists of 92 amino acids, including GnRH and a GnRH-associated peptide (GAP).
- GnRH secretion is modulated by both central neural inputs and peripheral hormones.
Conclusions:
- The medial basal hypothalamus acts as a GnRH pulse generator, influenced by higher neural centers.
- A complex interplay of neurotransmitters and neuropeptides regulates GnRH pulsatility.
- Understanding these mechanisms is crucial for reproductive health research.