| Prolactin-induced mitogenesis in the subventricular zone of the maternal brain during early pregnancy is essential for normal postpartum behavioral responses in the mother. | |
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MedLine Citation:
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PMID: 20484459 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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High prolactin during pregnancy, which is essential for normal postpartum maternal behavior, increases neurogenesis in the subventricular zone of the lateral ventricle (SVZ) of the maternal brain. Because SVZ mitogenesis generates new olfactory neurons and may contribute to perception of novel odorants, we hypothesized that the prolactin-induced increase in SVZ mitogenesis during pregnancy might be important for normal maternal interactions with pups. To investigate this hypothesis, prolactin secretion was suppressed for 3 d early in pregnancy in mice, using a carefully timed dose of bromocriptine. The bromocriptine-induced reduction in prolactin prevented the normal increase in generation of neural progenitors in the SVZ of the maternal brain. Another group of bromocriptine-treated animals were allowed to continue their pregnancy until term, and then maternal behaviors were evaluated postpartum. Low prolactin during early pregnancy, and the consequent suppression of mitogenesis in the SVZ of the maternal brain, was subsequently followed by increased postpartum anxiety and markedly impaired maternal behavior. In another group of pregnant females, injections of the mitotic inhibitor methylazoxymethanol to specifically suppress neurogenesis in the mother during early pregnancy without affecting prolactin secretion also caused postpartum anxiety and impaired maternal behavior. These data demonstrate that prolactin-induced increase in generation of neural progenitors in the SVZ of the maternal brain during early pregnancy is required for normal expression of postpartum maternal behaviors. |
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Authors:
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Caroline M Larsen; David R Grattan |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-05-19 |
Journal Detail:
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Title: Endocrinology Volume: 151 ISSN: 1945-7170 ISO Abbreviation: Endocrinology Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-07-27 Completed Date: 2010-09-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375040 Medline TA: Endocrinology Country: United States |
Other Details:
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Languages: eng Pagination: 3805-14 Citation Subset: AIM; IM |
Affiliation:
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Centre for Neuroendocrinology and Department of Anatomy and Structural Biology, University of Otago, New Zealand. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brain / cytology, drug effects*, metabolism, physiology Bromocriptine / pharmacology Cell Proliferation / drug effects Female Gestational Age Hormone Antagonists / pharmacology Lateral Ventricles / cytology, drug effects, physiology Maternal Behavior / drug effects*, physiology Mice Mice, Inbred C57BL Mitosis / drug effects*, physiology Neurogenesis / drug effects*, physiology Olfactory Nerve / drug effects, physiology Olfactory Perception / drug effects, physiology Postpartum Period / drug effects, physiology Pregnancy Prolactin / pharmacology*, physiology |
| Chemical | |
Reg. No./Substance:
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0/Hormone Antagonists; 25614-03-3/Bromocriptine; 9002-62-4/Prolactin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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