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Hypergravity induced prolactin surge in female ratsAcute initial exposure to hypergravity (HG) was previously found to induce prolonged diestrous in rats, which was followed by return to normal estrous cycling upon more prolonged exposure to continuous HG. Bromergocryptine was found to prevent this prolonged diestrous. In this study it is found that in female rats 20 h of 3.14 G exposure (D-1 1200 h until D-2 0800 h) can induce prolactin surge at D-2 1600 h. Shorter exposure time (8 h), or exposure during a different part of the estrous cycle (19 h: from D-1 0700 h until D-2 0200 h) could not elicit this prolactin surge. Similar exposure of male rats of HG did not alter significantly their prolactin levels. It is possible that the hypothalamus of male and female rats responds differently to stimulation by HG.
Document ID
19850059916
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Megory, E.
(NASA Ames Research Center Moffett Field, CA, United States)
Oyama, J.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1985
Publication Information
Publication: Aviation, Space, and Environmental Medicine
Volume: 56
ISSN: 0095-6562
Subject Category
Life Sciences (General)
Accession Number
85A42067
Distribution Limits
Public
Copyright
Other

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