Handling stress increases expression of male sexual behaviour in an amphibian with an explosive mating strategy

2015 ◽  
Vol 298 (3) ◽  
pp. 178-182 ◽  
Author(s):  
S. K. Woodley ◽  
B. A. Porter
Keyword(s):  
Sexual Behaviour ◽  
Mating Strategy ◽  
Handling Stress ◽  
Male Sexual Behaviour

Male sexual behaviour not abolished after medial preoptic lesion in adult rats

Neuroreport ◽  
1996 ◽  
Vol 7 (9) ◽  
pp. 1481-1484 ◽  
Author(s):  
Velayudhan Mohan Kumar ◽  
Naseem Ahmad Khan ◽  
Joshi John
Keyword(s):  
Sexual Behaviour ◽  
Adult Rats ◽  
Male Sexual Behaviour

scholarly journals Oestrogen's masculine side: mediation of mating in male mice

Reproduction ◽  
2002 ◽  
pp. 331-338 ◽  
Author(s):  
EM Scordalakes ◽  
DB Imwalle ◽  
EF Rissman
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Dopamine Agonist ◽  
Sexual Behaviour ◽  
Oestrogen Receptor ◽  
Neuronal Nitric Oxide Synthase ◽  
Receptor Alpha ◽  
Male Sexual Behaviour ◽  
Oestrogen Receptor Alpha ◽  
Oxide Synthase

This review focuses on the role of oestrogen in male sexual behaviour using oestrogen receptor alpha and beta knockout (ERalphaKO and ERbetaKO) mouse models. ERbetaKO mice are capable of mating and producing offspring, whereas ERalphaKO mice are unable to do either. When ERalphaKO males are treated with testosterone or dihydrotestosterone (DHT), < 50% display mounting behaviour, few intromit and none ejaculate. However, concurrent treatment with testosterone and a dopamine agonist instates masculine sexual behaviour in both male and female ERalphaKO mice. Dopamine content in the preoptic area and associated regions is not affected by oestrogen receptor alpha gene disruption. However, expression of neuronal nitric oxide synthase immunoreactivity is severely reduced in ERalphaKO males compared with wild-type males. These findings, together with studies conducted in aromatase knockout mice, are at odds with the dogma that oestrogen is required during development for expression of male sexual behaviour in adults. However, they do support a role for oestrogens, mediated by oestrogen receptor alpha, in regulation and production of neuronal nitric oxide synthase, which in turn may control dopamine agonist release. As has been shown in male rats, in mice dopamine agonist release is likely to be an essential component of the neural pathway that mediates male sexual behaviour.

POSSIBLE INVOLVEMENT OF CYCLIC AMP IN REGULATION OF MASCULINE SEXUAL BEHAVIOUR BY TESTOSTERONE

1974 ◽  
Vol 61 (1) ◽  
pp. 153-161 ◽  
Author(s):  
L. W. CHRISTENSEN ◽  
L. G. CLEMENS
Keyword(s):  
Cyclic Amp ◽  
Sexual Behaviour ◽  
Adrenal Glands ◽  
Testosterone Propionate ◽  
Major Effect ◽  
Concurrent Administration ◽  
Adrenal Androgen ◽  
Mediating Role ◽  
Male Sexual Behaviour ◽  
Masculine Sexual Behaviour

SUMMARY Experiments were carried out to assess the possible involvement of cyclic AMP in the regulation of masculine sexual behaviour by testosterone in the laboratory rat. Doses of testosterone propionate which were ineffective in maintaining or inducing male sexual behaviour were potentiated by concurrent administration of theophylline. Since removal of the adrenal glands had no effect on this potentiation, the possibility that theophylline increased adrenal androgen secretion and thereby influenced sexual behaviour, can be ruled out. A major effect of theophylline is to increase levels of cyclic AMP by inhibiting the enzyme which inactivates this nucleotide. These results suggest that cyclic AMP may play a mediating role in the regulation of masculine sexual behaviour by testosterone.

scholarly journals Sexual dysfunction in old age

2000 ◽  
Vol 6 (4) ◽  
pp. 270-277 ◽  
Author(s):  
André Ludovic Phanjoo
Keyword(s):  
Sexual Dysfunction ◽  
Older People ◽  
Old Age ◽  
Sexual Behaviour ◽  
Scientific Research ◽  
Psychological Effects ◽  
Institutional Setting ◽  
Male Sexual Behaviour ◽  
Physical Problems ◽  
The Subject

The sexual behaviour of older people is more often the target of jocularity or ridicule than the subject of serious scientific research. As a consequence, relatively little is known about the sexual behaviour of the over-65s and such information as is available shows a polarisation according to gender, male sexual behaviour and dysfunction being viewed very much in the light of physical problems, whereas women's sexual behaviour revolves around attitudes towards sexuality and the psychological effects of ageing. This review will address the biological changes associated with ageing, the psychological and social concomitants, the prevalence of sexual dysfunction, its aetiological factors, and the management of common sexual problems including those found in an institutional setting.

scholarly journals Prenatal exposure to paracetamol/acetaminophen and precursor aniline impairs masculinisation of male brain and behaviour

Reproduction ◽  
2017 ◽  
Vol 154 (2) ◽  
pp. 145-152 ◽  
Author(s):  
Anders Hay-Schmidt ◽  
Olivia T Ejlstrup Finkielman ◽  
Benjamin A H Jensen ◽  
Christine F Høgsbro ◽  
Jacob Bak Holm ◽  
...  
Keyword(s):  
Prenatal Exposure ◽  
Sexual Behaviour ◽  
Reproductive Tract ◽  
Reproductive Behaviour ◽  
Postnatal Life ◽  
Similar Reduction ◽  
Foetal Development ◽  
Male Adult ◽  
Male Sexual Behaviour ◽  
Neuronal Number

Paracetamol/acetaminophen (N-Acetyl-p-Aminophenol; APAP) is the preferred analgesic for pain relief and fever during pregnancy. It has therefore caused concern that several studies have reported that prenatal exposure to APAP results in developmental alterations in both the reproductive tract and the brain. Genitals and nervous system of male mammals are actively masculinised during foetal development and early postnatal life by the combined actions of prostaglandins and androgens, resulting in the male-typical reproductive behaviour seen in adulthood. Both androgens and prostaglandins are known to be inhibited by APAP. Through intrauterine exposure experiments in C57BL/6 mice, we found that exposure to APAP decreased neuronal number in the sexually dimorphic nucleus (SDN) of the preoptic area (POA) in the anterior hypothalamus of male adult offspring. Likewise, exposure to the environmental pollutant and precursor of APAP, aniline, resulted in a similar reduction. Decrease in neuronal number in the SDN-POA is associated with reductions in male sexual behaviour. Consistent with the changes, male mice exposed in uteri to APAP exhibited changes in urinary marking behaviour as adults and had a less aggressive territorial display towards intruders of the same gender. Additionally, exposed males had reduced intromissions and ejaculations during mating with females in oestrus. Together, these data suggest that prenatal exposure to APAP may impair male sexual behaviour in adulthood by disrupting the sexual neurobehavioral programming. These findings add to the growing body of evidence suggesting the need to limit the widespread exposure and use of APAP by pregnant women.

Perceived male sexual needs and male sexual behaviour in southwest Nigeria

1997 ◽  
Vol 44 (8) ◽  
pp. 1195-1207 ◽  
Author(s):  
I.O. Orubuloye ◽  
John C. Caldwell ◽  
Pat Caldwell
Keyword(s):  
Sexual Behaviour ◽  
Male Sexual Behaviour ◽  
Southwest Nigeria

THE COMPARATIVE ACTIONS OF TESTOSTERONE PROPIONATE AND 5α-ANDROSTAN17β-OL-3-ONE PROPIONATE ON THE REPRODUCTIVE BEHAVIOUR, PHYSIOLOGY AND MORPHOLOGY OF MALE RATS

1971 ◽  
Vol 51 (2) ◽  
pp. 241-NP ◽  
Author(s):  
H. H. FEDER
Keyword(s):  
Body Weight ◽  
Seminal Vesicle ◽  
Sexual Behaviour ◽  
Testosterone Propionate ◽  
Reproductive Behaviour ◽  
Male Rats ◽  
Male Sexual Behaviour ◽  
Testicular Weight ◽  
Seminal Vesicle Weight ◽  
Experienced Adult

SUMMARY 5α-Androstan-17β-ol-3-one in its free or in its propionate form was injected systemically (125 μg/day/rat) into sexually experienced, adult, castrated, male rats. These compounds were ineffective in activating masculine behaviour patterns, despite having measurable effects on body weight, seminal vesicle weight and penile morphology. The propionate form also had strong anti-gonadotrophic properties, since when it was injected for 6 days into intact, immature, male rats it significantly reduced testicular weight. In contrast, testosterone propionate (125 μg/day/rat) restored male sexual behaviour to the levels found before castration when injected systemically. Testosterone propionate also affected body weight, seminal vesicle weight, penile morphology and the testicular weight of immature males. These effects may have been due in part to conversion of testosterone to 5α-androstan-17β-ol-3-one, but this metabolic step does not seem to be obligatory for activation of male sexual behaviour in rats.

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