The Year in Neuroendocrinology.

Area of Science:

• Neuroendocrinology
• Reproductive Endocrinology
• Epigenetics

Background:

• Estradiol's neural mechanisms are expanding, including new receptors and rapid neurosteroid regulation by social factors.
• Brain sexual differentiation can occur independently of estrogen receptors in targeted neurons.
• Xenoestrogens can interfere with estradiol and testosterone actions in brain synapses.

Purpose of the Study:

• To summarize key advancements in neuroendocrinology presented at the 2009 Endocrine Society meeting.
• To highlight progress in estradiol's neural actions, GnRH regulation, and epigenetics.
• To provide an overview of significant findings in reproductive endocrinology and neurobiology.

Main Methods:

• Review of recent findings presented at a major scientific conference.
• Synthesis of research on neurosteroid synthesis, brain sexual differentiation, and xenoestrogen effects.
• Analysis of peptide involvement in GnRH regulation and reproductive processes.

Main Results:

• Estradiol's actions involve expanding receptor lists and social regulation of neurosteroids.
• Kisspeptin, neurokinin B, and RFamide-related peptides are critical in reproductive endocrinology and GnRH neuron regulation.
• Epigenetic regulation by parental care impacts human stress axes, potentially linking childhood abuse to long-term effects.

Conclusions:

• Neuroendocrinology is rapidly advancing with significant findings in estradiol action, GnRH regulation, and epigenetics.
• These advancements offer new perspectives on reproductive health, brain development, and stress response.
• The long-term impact of these findings on the field will be determined by future research and citation impact.