PMID- 23701531 OWN - NLM STAT- MEDLINE DCOM- 20140225 LR - 20211021 IS - 1365-2826 (Electronic) IS - 0953-8194 (Print) IS - 0953-8194 (Linking) VI - 25 IP - 8 DP - 2013 Aug TI - Physiological regulation of magnocellular neurosecretory cell activity: integration of intrinsic, local and afferent mechanisms. PG - 678-710 LID - 10.1111/jne.12051 [doi] AB - The hypothalamic supraoptic and paraventricular nuclei contain magnocellular neurosecretory cells (MNCs) that project to the posterior pituitary gland where they secrete either oxytocin or vasopressin (the antidiuretic hormone) into the circulation. Oxytocin is important for delivery at birth and is essential for milk ejection during suckling. Vasopressin primarily promotes water reabsorption in the kidney to maintain body fluid balance, but also increases vasoconstriction. The profile of oxytocin and vasopressin secretion is principally determined by the pattern of action potentials initiated at the cell bodies. Although it has long been known that the activity of MNCs depends upon afferent inputs that relay information on reproductive, osmotic and cardiovascular status, it has recently become clear that activity depends critically on local regulation by glial cells, as well as intrinsic regulation by the MNCs themselves. Here, we provide an overview of recent advances in our understanding of how intrinsic and local extrinsic mechanisms integrate with afferent inputs to generate appropriate physiological regulation of oxytocin and vasopressin MNC activity. CI - (c) 2013 British Society for Neuroendocrinology. FAU - Brown, C H AU - Brown CH AD - Department of Physiology and Centre for Neuroendocrinology, University of Otago, Dunedin, New Zealand. colin.brown@otago.ac.nz FAU - Bains, J S AU - Bains JS FAU - Ludwig, M AU - Ludwig M FAU - Stern, J E AU - Stern JE LA - eng GR - R01 HL112225/HL/NHLBI NIH HHS/United States GR - R21 HL113801/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - J Neuroendocrinol JT - Journal of neuroendocrinology JID - 8913461 RN - 50-56-6 (Oxytocin) SB - IM MH - *Afferent Pathways MH - Animals MH - Hypothalamus/cytology/metabolism/physiology MH - Neurons/metabolism/*physiology MH - Oxytocin/metabolism MH - Rats PMC - PMC3852704 MID - NIHMS485754 OTO - NOTNLM OT - osmoregulation OT - oxytocin OT - paraventricular nucleus OT - reproduction OT - supraoptic nucleus OT - vasopressin EDAT- 2013/05/25 06:00 MHDA- 2014/02/26 06:00 PMCR- 2014/08/01 CRDT- 2013/05/25 06:00 PHST- 2013/03/31 00:00 [received] PHST- 2013/05/08 00:00 [revised] PHST- 2013/05/20 00:00 [accepted] PHST- 2013/05/25 06:00 [entrez] PHST- 2013/05/25 06:00 [pubmed] PHST- 2014/02/26 06:00 [medline] PHST- 2014/08/01 00:00 [pmc-release] AID - 10.1111/jne.12051 [doi] PST - ppublish SO - J Neuroendocrinol. 2013 Aug;25(8):678-710. doi: 10.1111/jne.12051.