Astroglial Regulation of Magnocellular Neuroendocrine Cell Activities in the Supraoptic Nucleus.
Glial fibrillary acidic protein
Lactation
Morphological plasticity
Osmolality
Oxytocin
Vasopressin
Journal
Neurochemical research
ISSN: 1573-6903
Titre abrégé: Neurochem Res
Pays: United States
ID NLM: 7613461
Informations de publication
Date de publication:
Oct 2021
Oct 2021
Historique:
received:
09
10
2020
accepted:
09
11
2020
revised:
02
11
2020
pubmed:
21
11
2020
medline:
11
1
2022
entrez:
20
11
2020
Statut:
ppublish
Résumé
Studies on the interactions between astrocytes and neurons in the hypothalamo-neurohypophysial system have significantly facilitated our understanding of the regulation of neural activities. This has been exemplified in the interactions between astrocytes and magnocellular neuroendocrine cells (MNCs) in the supraoptic nucleus (SON), specifically during osmotic stimulation and lactation. In response to changes in neurochemical environment in the SON, astrocytic morphology and functions change significantly, which further modulates MNC activity and the secretion of vasopressin and oxytocin. In osmotic regulation, short-term dehydration or water overload causes transient retraction or expansion of astrocytic processes, which increases or decreases the activity of SON neurons, respectively. Prolonged osmotic stimulation causes adaptive change in astrocytic plasticity in the SON, which allows osmosensory neurons to reserve osmosensitivity at new levels. During lactation, changes in neurochemical environment cause retraction of astrocytic processes around oxytocin neurons, which increases MNC's ability to secrete oxytocin. During suckling by a baby/pup, astrocytic processes in the mother/dams exhibit alternative retraction and expansion around oxytocin neurons, which mirrors intermittently synchronized activation of oxytocin neurons and the post-excitation inhibition, respectively. The morphological and functional plasticities of astrocytes depend on a series of cellular events involving glial fibrillary acidic protein, aquaporin 4, volume regulated anion channels, transporters and other astrocytic functional molecules. This review further explores mechanisms underlying astroglial regulation of the neuroendocrine neuronal activities in acute processes based on the knowledge from studies on the SON.
Identifiants
pubmed: 33216313
doi: 10.1007/s11064-020-03172-2
pii: 10.1007/s11064-020-03172-2
pmc: PMC8134618
mid: NIHMS1648822
doi:
Substances chimiques
Aquaporin 4
0
Glial Fibrillary Acidic Protein
0
Types de publication
Journal Article
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
2586-2600Subventions
Organisme : NIGMS NIH HHS
ID : R01 GM123971
Pays : United States
Organisme : National Natural Science Foundation of China
ID : 31471113
Organisme : NIH HHS
ID : R01GM123971
Pays : United States
Organisme : NIH HHS
ID : R01GM123971
Pays : United States
Informations de copyright
© 2020. Springer Science+Business Media, LLC, part of Springer Nature.
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