Abstract：
:Enkephalins facilitate female reproductive behavior. Within the limbic system and hypothalamus, estrogen induced the expression of preproenkephalin (PPE) mRNA. Estrogen injection caused a biphasic increase in the PPE mRNA levels within the ventromedial hypothalamic nucleus and posterodorsal medial amygdala. The first peak of PPE mRNA levels occurred within an hour, and the second 24 to 48 h after subcutaneous injection of estrogen. The present studies indicated that the rapid first peak of PPE mRNA expression was stress induced, whereas the second peak was estrogen induced. In the posterodorsal medial amygdala but not in the ventromedial hypothalamic nucleus, the antiestrogen, tamoxifen, did not inhibit the first peak, but blocked the second peak of PPE mRNA expression. Subcutaneous oil injection induced a 1-h peak of PPE mRNA levels but not a 24-h peak. Peak levels of plasma corticosterone were coincident with peak PPE mRNA levels. Adrenalectomy plus a constant, low level of corticosterone eliminated the injection-induced increase of corticosterone levels and the subsequent increase in PPE mRNA expression in the ventromedial hypothalamic nucleus and posterodorsal medial amygdala. The present results indicate that both stress steroids and estrogen positively regulate PPE mRNA levels in the ventromedial hypothalamic nucleus and posterodorsal medial amygdala. These results are consistent with the hypothesis that acute, mild stress may contribute to the activation of circuits that facilitate reproductive behavior in the female.
journal_name
Physiol Behavjournal_title
Physiology & behaviorauthors
Sinchak K,Eckersell C,Quezada V,Norell A,Micevych Pdoi
10.1016/s0031-9384(99)00261-9subject
Has Abstractpub_date
2000-06-01 00:00:00pages
425-32issue
4-5eissn
0031-9384issn
1873-507Xpii
S0031938499002619journal_volume
69pub_type
杂志文章abstract：:Lateral asymmetries in the direction of turning during escape behavior in a species of teleost fish, Jenynsia lineata, are reported. When faced with the visual image of a simulated predator, approximately half of the individuals exhibited a significant bias to turn rightwards or leftwards, and the asymmetry tended to ...
journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：1997-01-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(86)90352-5
更新日期：1986-01-01 00:00:00
abstract：:Sodium deficiency reliably produces a robust intake of saline in rats, which is associated with an increased preference for sodium solutions at hypertonic concentrations that would normally be avoided. The mechanisms underlying the shift to an increased preference for sodium in the deficient state are not well underst...
journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：2012-05-15 00:00:00
abstract：:Many clinical studies show that a sizeable proportion of male alcoholics are also inclined to act violently and aggressively. Given this association in humans, we asked whether a relationship exists between ethanol intake and aggressive behaviour in laboratory rats. In a first test of the hypothesis, we measured ethan...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(95)02156-6
更新日期：1996-04-01 00:00:00
abstract：:Learned aversions developed following sublethal ingestion of poisons are reported to be long-lived in many pest species. This study aimed to identify the duration of bait aversions following poisoning with a common poison (cyanide) used for possum control in New Zealand. Groups of possums with bait aversions (followin...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(97)00175-3
更新日期：1997-10-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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journal_title：Physiology & behavior
pub_type： 杂志文章
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pub_type： 杂志文章
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pub_type： 杂志文章
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更新日期：1976-12-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2014.01.015
更新日期：2014-09-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章,评审
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更新日期：2006-08-30 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(85)90353-1
更新日期：1985-08-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：2018-10-01 00:00:00
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journal_title：Physiology & behavior
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：2000-08-01 00:00:00
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pub_type： 杂志文章
doi：10.1016/j.physbeh.2005.08.057
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pub_type： 临床试验,杂志文章,随机对照试验
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更新日期：2015-11-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：2015-02-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：1999-05-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：1984-05-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：1987-01-01 00:00:00
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pub_type： 杂志文章
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更新日期：1994-09-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(96)00611-7
更新日期：1997-06-01 00:00:00
abstract：:The role of olfactory input in the regulation of food intake and feeding patterns in rats was investigated by performing bilateral olfactory bulbectomy. Compared to control rats, bulbectomized rats ate the same amounts of food, but did so via a decrease in meal size, and a doubling in meal number. Although no increase...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(93)90238-b
更新日期：1993-09-01 00:00:00
