Abstract:
:Previous studies in our laboratory have shown that estradiol and progesterone affect beta-endorphin and Met-enkephalin levels in specific brain regions and that these effects are diurnally controlled. The present investigation was conducted to evaluate the effects of estradiol and progesterone on pain latency and brain opioid receptors of ovariectomized rats. Female Sprague-Dawley rats (100-120 g) adapted to a 12 hr light:12 hr dark illumination cycle were used in these studies. Animals were ovariectomized under pentobarbital anesthesia. After a recovery period of 10-14 days, estradiol (50 micrograms/kg/day in 0.2 ml olive oil) and progesterone (5 mg/kg/day in 0.1 ml olive oil) were administrated subcutaneously in the dorsal neck region alone and in combination at 16:00 hr for 7 days. Control animals received 0.2 ml olive oil. Control and treated groups were evaluated daily for pain latency postinjection using the tailflick and hotplate methods. On Day 7 of drug treatment, animals were sacrificed by decapitiation after pain latency evaluations. Whole brains were removed and immediately frozen at -70 degrees C. Binding and affinity of brain opiate receptors were determined for each treatment group. Results obtained indicate that estradiol and progesterone treatment alone or in combination significantly alter pain latency. This alteration in pain was not accompanied by any change in affinity or number of mu opioid receptors. However, an increase in Kd of kappa opiate receptors was observed following treatment with estradiol, progesterone, or their combination. This increase in Kd of kappa opiate receptors may in part explain the increased hotplate sensitivity following estrogen administration. The present findings suggest that the decrease in pain sensitivity induced by estradiol or progesterone could not be explained by their effects on opioid receptors. The previously reported effects of estradiol and progesterone on brain levels of beta-endorphin and Met-enkephalin may contribute to the analgesic effects of these steroids.
journal_name
Horm Behavjournal_title
Hormones and behaviorauthors
Gordon FT,Soliman MRdoi
10.1006/hbeh.1996.0029subject
Has Abstractpub_date
1996-09-01 00:00:00pages
244-50issue
3eissn
0018-506Xissn
1095-6867pii
S0018-506X(96)90029-Xjournal_volume
30pub_type
杂志文章abstract::The individual time patterns of salivary testosterone of adult healthy men, self-reported sexual behavior and their co-occurrence with regular weekly or monthly intervals were studied. Twenty-seven volunteer males (mean age 33 +/- 1 years) collected daily morning saliva over a period of 90 days. Evening questionnaires...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1006/hbeh.2002.1815
更新日期:2002-09-01 00:00:00
abstract::Tonic immobility (TI) is also known as "immobility response", "immobility reflex", "animal hypnosis", etc. It is an innate antipredatory behavior characterized by an absence of movement, varying degrees of muscular activity, and a relative unresponsiveness to external stimuli. Experimentally, TI is commonly produced b...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2011.07.013
更新日期:2011-09-01 00:00:00
abstract::Recent studies have reported that oxytocin ameliorates behavioral abnormalities in both animal models and individuals with autism spectrum disorders (ASD). However, the mechanisms underlying the ameliorating effects of oxytocin remain unclear. In this study, we examined the effects of intranasal oxytocin on impairment...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2017.09.013
更新日期:2017-11-01 00:00:00
abstract::A growing body of evidence demonstrates that estrogen and corticosterone (CORT) impact on cognition and emotion. On the one hand, ovarian hormones may have beneficial effects on several neurophysiological processes, including memory. On the other hand, chronic exposure to stressful conditions has negative effects on b...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2019.104563
更新日期:2019-09-01 00:00:00
abstract::Estrogen impairs performance on some striatum-sensitive tasks of learning and memory. Evidence indicates that it may have these impairing effects by creating a bias to use hippocampally based strategies to solve tasks whether or not it is advantageous to do so. Estrogen may also exert direct effects in the striatum to...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2005.05.001
更新日期:2006-01-01 00:00:00
abstract::After proposing the organizational hypothesis from research in prenatally androgenized guinea pigs (Phoenix, C.H., Goy, R.W., Gerall, A.A., Young, W.C., 1959. Organizational action of prenatally administered testosterone propionate on the tissues mediating mating behavior in the female guinea pig. Endocrinology 65, 36...
journal_title:Hormones and behavior
pub_type: 杂志文章,评审
doi:10.1016/j.yhbeh.2009.03.015
更新日期:2009-05-01 00:00:00
abstract::Similarities as well as differences across species in the control of sexual behavior are helping to fully understand the subtle relations between physiology and eco-ethological constraints and how the brain integrates such information. We will illustrate this with sexual behavior in domestic ruminants and especially e...
journal_title:Hormones and behavior
pub_type: 杂志文章,评审
doi:10.1016/j.yhbeh.2007.04.001
更新日期:2007-06-01 00:00:00
abstract::Avian eggs contain substantial amounts of maternal yolk androgens, which have been shown to modulate offspring phenotype. The first studies on the functional consequences of maternal yolk androgens have focused on early life stages and their role in sibling competition. However, recent longitudinal studies reported lo...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2008.02.005
更新日期:2008-06-01 00:00:00
abstract::We studied the role of progesterone receptor (PR) in the display of female sexual behavior during postpartum estrus in rats. Adult female rats were treated with the PR antagonist, RU486 (1.25 and 5 mg), 3 h after parturition and sexual behavior was evaluated throughout the first postpartum day. Estradiol and progester...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2010.10.008
更新日期:2011-01-01 00:00:00
abstract::Exposure to stressors can affect an organism's physiology and behavior as well as that of its descendants (e.g. through maternal effects, epigenetics, and/or selection). We examined the relative influence of early life vs. transgenerational stress exposure on adult stress physiology in a species that has populations w...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2016.11.010
更新日期:2017-01-01 00:00:00
abstract::The influence of neonatal androgen on the potential to exhibit feminine sexual behavior was investigated. Male rats castrated on Day 0 but not those castrated on Day 4 or later showed hop/darting, ear wiggling, and lordotic behavior in response to treatment with estrogen and progesterone in adulthood at a frequency eq...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/0018-506x(88)90008-6
更新日期:1988-09-01 00:00:00
abstract::Behavioral lateralization is common in animals and may be expressed at the individual- and at the population-level. The ontogenetic processes that control lateralization, however, are largely unknown. Well-established sex-dependence in androgen physiology and sex-dependent variation in lateralization have led to the h...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2016.01.007
更新日期:2016-04-01 00:00:00
abstract::Studies examining the roles of estrogens and progestins on spatial cognition have been highly contradictory. To determine if the hormonal environment of pregnancy affects spatial cognition, pregnant (n = 7) and virgin (n = 7) Hooded Long-Evans rats were tested in a Morris water maze throughout the 3 weeks of pregnancy...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2005.08.002
更新日期:2006-03-01 00:00:00
abstract::Estrogen Therapy (ET) may protect against age-related cognitive decline and neuropsychiatric disorders (e.g. Alzheimer's disease). The biological basis for this putative neuroprotective effect is not fully understood, but may include modulation of cholinergic systems. Cholinergic dysfunction has been implicated in age...
journal_title:Hormones and behavior
pub_type: 临床试验,杂志文章
doi:10.1016/j.yhbeh.2006.10.007
更新日期:2007-02-01 00:00:00
abstract::There is growing evidence from preclinical studies for an involvement of orexins (ORX) in the regulation of stress, affectivity and addictive behavior. The aim of our study was to gather corresponding clinical data and to elucidate the relationships between alcohol withdrawal stress, ORX plasma concentration and psych...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2011.08.017
更新日期:2011-11-01 00:00:00
abstract::Early life experiences are important for the development of neurobiobehavioral mechanisms and subsequent establishment of mental functions. In experimental animals, early life experiences can be studied using the maternal separation model. Maternal separation has been described to induce neurobiological changes and th...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2006.06.016
更新日期:2006-12-01 00:00:00
abstract::Adolescence is a period during which many social behaviors emerge. One such behavior, flank marking, is a testosterone-modulated scent marking behavior that communicates dominance status between adult male Syrian hamsters. Testosterone modulates flank-marking behavior by altering neural transmission of vasopressin wit...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2006.06.006
更新日期:2006-09-01 00:00:00
abstract::Neuropeptides, especially oxytocin (OT) and arginine vasopressin (AVP), have been implicated in several features of monogamy including alloparenting. The purpose of the present study was to examine the role of OT and AVP in alloparental behavior in reproductively naïve male prairie voles. Males received intracerebrove...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2004.01.004
更新日期:2004-05-01 00:00:00
abstract::Many seasonally breeding vertebrate species have an associated reproductive pattern: mating behavior, gonadal activity, and peak circulating androgen levels occur simultaneously. In these species, androgens influence the expression of male mating behavior. Other species have a dissociated reproductive pattern: mating ...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2007.02.004
更新日期:2007-04-01 00:00:00
abstract::Male and female hamsters differ in the stimulus control of the ultrasounds they produce during courtship and mating. In particular, untreated males show greater increases in ultrasound rate after exposure to stimulus females than after contact with other males. Conversely, estrous females are more responsive to stimul...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/0018-506x(87)90027-4
更新日期:1987-03-01 00:00:00
abstract::The effects on adult sexually dimorphic behavior of perinatal exposure to estrogen were examined by treating male and female gray opossums with estradiol (EST), an estrogen receptor antagonist (tamoxifen:TX) or oil control (OIL) during the first week of life, a time period corresponding in this marsupial to late gesta...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1006/hbeh.1999.1561
更新日期:2000-02-01 00:00:00
abstract::Chemosensory stimuli and sex steroid hormones are both required for the full expression of social behaviors in many species. The terrestrial salamander, Plethodon shermani, is an emerging nonmammalian system for investigating the nature and evolution of pheromonal communication, yet little is known regarding the role ...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2006.06.014
更新日期:2006-09-01 00:00:00
abstract::We investigated whether sexual activity was associated with reproductive function in the BioCycle Study, a prospective cohort study that followed 259 regularly menstruating women aged 18 to 44years for one (n=9) or two (n=250) menstrual cycles in 2005-2007. Women were not attempting pregnancy nor using hormonal contra...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2014.06.012
更新日期:2014-07-01 00:00:00
abstract::Semelparous Pacific salmon (Onchorynchus spp.) serve as an excellent model for examining the relationships between life history, behavior and individual variation in glucocorticoid (GC) stress hormone levels because reproductive behaviors are highly variable between individuals and failure to reproduce results in zero...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2011.07.017
更新日期:2011-11-01 00:00:00
abstract::Daily sexual activity of sexually active lesbian couples was recorded over a 14-week period. Significant peaks in sexual encounters and orgasms were found during the midcycle portion of the menstrual cycle. These results demonstrate a pattern of increased midcycle sexual activity independent of interactions with males...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/0018-506x(84)90014-x
更新日期:1984-09-01 00:00:00
abstract::When ovariectomized/adrenalectomized female rats, injected with subthreshold doses of estradiol are given copulatory stimulation by a male rat at half hour intervals, the level of lordosis gradually increases over the course of a few hours. We tested the hypothesis that paracopulatory behaviors (behaviors that occur r...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2008.12.008
更新日期:2009-03-01 00:00:00
abstract::In rodents, parts of the arginine-vasopressin (AVP) neuronal system are sexually dimorphic with males having more AVP-immunoreactive cells/fibers than females. This neuropeptide neuronal system is highly sensitive to steroids and has been proposed to play an important role in the processing of olfactory cues critical ...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2008.02.001
更新日期:2008-06-01 00:00:00
abstract::When rats are mated in a traditional mating chamber (with one male and one female) in which the male dictates the pace of the copulatory sequence, males develop a reward state as evaluated by conditioned place preference (CPP). In this mating situation no reward state is induced in females. However, when female rats a...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1006/hbeh.2001.1712
更新日期:2001-12-01 00:00:00
abstract::In many species, females are more sexually attractive to males near ovulation. Some evidence suggests a similar pattern in humans, but methodological limitations prohibit firm conclusions at present, and information on physiological mechanisms underlying any such pattern is lacking. In 202 normally-cycling women, we e...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2012.11.007
更新日期:2013-01-01 00:00:00
abstract::Estradiol replacement to ovariectomized female rats causes dramatic changes in hippocampal structure and function as well as in performance on hippocampally dependent tasks. Using a delayed matching-to-place version of the water maze, the present study examines the time course of estradiol-induced enhancements in memo...
journal_title:Hormones and behavior
pub_type: 杂志文章
doi:10.1016/j.yhbeh.2003.09.010
更新日期:2004-02-01 00:00:00