Sexual Dimorphism in a Chemosensory System: The Role of the Vomeronasal Organ in Salamander Reproductive Behavior

Copeia ◽  
1992 ◽  
Vol 1992 (1) ◽  
pp. 113 ◽  
Author(s):  
Ellen M. Dawley
Keyword(s):  
Sexual Dimorphism ◽  
Reproductive Behavior ◽  
Vomeronasal Organ ◽  
Chemosensory System

The role of hormones

2018 ◽  
Author(s):  
H. Frederik Nijhout ◽  
Emily Laub
Keyword(s):  
Phenotypic Plasticity ◽  
Social Behavior ◽  
Parental Care ◽  
Juvenile Hormone ◽  
Reproductive Behavior ◽  
Hormonal Control ◽  
Plastic Trait

Many behaviors of insects are stimulated, modified, or modulated by hormones. The principal hormones involved are the same as the ones that control moulting, metamorphosis, and other aspects of development, principally ecdysone and juvenile hormone. In addition, a small handful of neurosecretory hormones are involved in the control of specific behaviors. Because behavior is a plastic trait, this chapter begins by outlining the biology and hormonal control of phenotypic plasticity in insects, and how the hormonal control of behavior fits in with other aspects of the control of phenotypic plasticity. The rest of the chapter is organized around the diversity of behaviors that are known to be controlled by or affected by hormones. These include eclosion and moulting behavior, the synthesis and release of pheromones, migration, parental care, dominance, reproductive behavior, and social behavior.

scholarly journals Regulatory Role of Sex Hormones in Cardiovascular Calcification

2021 ◽  
Vol 22 (9) ◽  
pp. 4620
Author(s):  
Holly J. Woodward ◽  
Dongxing Zhu ◽  
Patrick W. F. Hadoke ◽  
Victoria E. MacRae
Keyword(s):  
Cardiovascular Disease ◽  
Sex Differences ◽  
Sexual Dimorphism ◽  
Aortic Stenosis ◽  
Sex Hormones ◽  
Sex Hormone ◽  
Increased Risk ◽  
Male Sex ◽  
Primary Male

Sex differences in cardiovascular disease (CVD), including aortic stenosis, atherosclerosis and cardiovascular calcification, are well documented. High levels of testosterone, the primary male sex hormone, are associated with increased risk of cardiovascular calcification, whilst estrogen, the primary female sex hormone, is considered cardioprotective. Current understanding of sexual dimorphism in cardiovascular calcification is still very limited. This review assesses the evidence that the actions of sex hormones influence the development of cardiovascular calcification. We address the current question of whether sex hormones could play a role in the sexual dimorphism seen in cardiovascular calcification, by discussing potential mechanisms of actions of sex hormones and evidence in pre-clinical research. More advanced investigations and understanding of sex hormones in calcification could provide a better translational outcome for those suffering with cardiovascular calcification.

Abstract P199: Mas Receptor Deficiency Regulates Obesity-Hypertension and Cardiac Function in Female and Male Mice

Hypertension ◽  
2016 ◽  
Vol 68 (suppl_1) ◽  
Author(s):  
Robin C Shoemaker ◽  
Yu Wang ◽  
Sean Thatcher ◽  
Lisa Cassis
Keyword(s):  
Blood Pressure ◽  
Sexual Dimorphism ◽  
Cardiac Function ◽  
Male Mice ◽  
Reduced Ejection Fraction ◽  
Obesity Hypertension ◽  
Obese Male ◽  
Deficient Mice ◽  
Cmr Imaging

Angiotensin-1-7 (Ang-(1-7)) counteracts angiotensin II through effects at Mas receptors (MasR). We demonstrated that sexual dimorphism of obesity-hypertension was associated with dysregulated production of Ang-(1-7). However, the role of MasR in sexual dimorphism of obesity-hypertension has not been examined. MasR deficient mice have also been reported to exhibit deficits in cardiac function. In this study, we hypothesized that deficiency of the MasR would differentially regulate obesity-hypertension in male versus ( vs ) female mice. In addition, we quantified effects of MasR deficiency on cardiac function in obese male mice. Male and female MasR +/+ and -/- mice were fed a low fat (LF, 10%kcal) or high fat (HF, 60% kcal) diet for 16 weeks, and blood pressure was quantified by radiotelemetry. As demonstrated previously, male MasR +/+ mice (24 hr diastolic blood pressure, DBP: LF, 90 ± 3; HF, 96 ± 2 mmHg; P<0.05), but not females (LF, 85 ± 1; HF, 85 ± 2 mmHg), developed hypertension in response to HF feeding. MasR deficiency converted female HF-fed mice to an obesity-hypertension phenotype (DBP: 92 ± 1 mmHg; P<0.05). Surprisingly, male HF-fed MasR -/- mice exhibited reduced DBP compared to HF-fed MasR +/+ males (90 ± 1 vs 96 ± 2 mmHg; P<0.05). To define mechanisms for reductions in DBP of HF-fed male MasR -/- mice, we performed cardiac magnetic resonance (CMR) imaging in both genotypes at 1 month of HF feeding. MasR -/- mice had significantly reduced ejection fraction (EF) compared to MasR +/+ mice at baseline (51.4 ± 2.5 vs 59.3 ± 2.1%; P<0.05) and after one month of HF-feeding (49.8 ± 2.4 vs 52.6 ± 1.9%; P<0.05). Further, CMR imaging demonstrated a thickening of the ventricle wall in MasR -/- mice with 1 month of HF-feeding. MasR +/+ , but not MasR -/- mice, exhibited diet-induced reductions in EF (by 16%; P<0.05) at 1 month of HF feeding, which were reversed by infusion of Ang-(1-7). These results demonstrate that MasR contributes to sexual dimorphism of obesity-hypertension. Ang-(1-7) protects females from obesity-hypertension through the MasR. In contrast, reductions in DBP in obese male mice with MasR deficiency may arise from deficits in cardiac function. These results suggest that MasR agonists may be effective therapies for obesity-associated cardiovascular conditions.

Regulation of the Rat Estrous Cycle by Predator Odors: Role of the Vomeronasal Organ

1992 ◽  
pp. 281-284 ◽  
Author(s):  
V. V. Voznessenskaya ◽  
C. J. Wysocki ◽  
E. P. Zinkevich
Keyword(s):  
Estrous Cycle ◽  
Vomeronasal Organ ◽  
Predator Odors

scholarly journals Sexual Dimorphism of Rat Liver Gene Expression: Regulatory Role of Growth Hormone Revealed by Deoxyribonucleic Acid Microarray Analysis

2004 ◽  
Vol 18 (3) ◽  
pp. 747-760 ◽  
Author(s):  
Amrita Ahluwalia ◽  
Karl H. Clodfelter ◽  
David J. Waxman
Keyword(s):  
Gene Expression ◽  
Growth Hormone ◽  
Sexual Dimorphism ◽  
Microarray Analysis ◽  
Rat Liver ◽  
Deoxyribonucleic Acid ◽  
Regulatory Role ◽  
Liver Gene

Infanticide in the male rat: The role of the vomeronasal organ

1988 ◽  
Vol 42 (3) ◽  
pp. 303-306 ◽  
Author(s):  
Julie A. Mennella ◽  
Howard Moltz
Keyword(s):  
Vomeronasal Organ ◽  
Male Rat

scholarly journals Testosterone and sex: the role of hormones in sexual dimorphism

2015 ◽  
Vol 29 (S1) ◽  
Author(s):  
Jonathan Partsch ◽  
Daniella Rodriguez ◽  
Gregory Van Dongen ◽  
Ellen Ketterson ◽  
Mark Peterson
Keyword(s):  
Sexual Dimorphism

scholarly journals Generative Strategies of Russian Men in Terms of Depopulation

2021 ◽  
Vol 20 (3) ◽  
pp. 78-86
Author(s):  
Chulpan I. Ildarhanova ◽  
Keyword(s):  
Reproductive Behavior ◽  
Family Relations ◽  
Federal District ◽  
Family Values ◽  
Value System ◽  
The North ◽  
The Family ◽  
Generative Behavior ◽  
North Western

Theoretical and methodological base of the research includes socio-demographic, thesaurus and generational approaches. Scientific and methodical base of the research is a survey held in the Volga Federal District (Republic of Tatarstan) and the North-Western Federal District (Vologda Region). This study reflects the rupture of the family thesaurus, the loss of the authoritarian value system of family relations, which leads to the leveling of responsibility, distortion of the forms of family relations, and orientation to false family values. Transmission of marital and reproductive behavior of Russian men in intergenerational aspect is analyzed on the base of the empiric survey, the role of father in comparative correlation with transmission of value heritage of fatherhood image is discovered. The scientific novelty of the study is to identify, based on the original methodology, problem areas for the implementation of various models of generative behavior of Russian men in the conditions of transformation of family and parenting institutions.

Reproductive Behavior and Sexual Dimorphism in the Manacled Sculpin, Synchirus gilli Bean

Copeia ◽  
1964 ◽  
Vol 1964 (2) ◽  
pp. 448 ◽  
Author(s):  
Richard J. Krejsa
Keyword(s):  
Sexual Dimorphism ◽  
Reproductive Behavior

scholarly journals Sexual dimorphism in immune function: The role of sex steroid hormones

2018 ◽  
Vol 51 ◽  
pp. 02007
Author(s):  
Anna Mihailova ◽  
Indrikis Krams
Keyword(s):  
Immune System ◽  
Sexual Dimorphism ◽  
Infectious Diseases ◽  
Immune Function ◽  
Steroid Hormones ◽  
Adaptive Immunity ◽  
Gonadal Hormones ◽  
Sex Steroid ◽  
Innate And Adaptive Immunity

There is evidence of the relation of sex steroid hormones and sexual dimorphism in immune system response to infectious diseases. The aim of this review was to identify the role of sex hormones in immune function and sexual dimorphism of immune reactions. Gonadal hormones together with the immune system play an important role in process of immune responses to the disease [1]. Estrogens, progesterone and testosterone have different impacts on immune cells and different gonadal hormones are of high importance for responses of innate and adaptive immunity [1, 2]. Estrogens mainly enhance immune function while testosterone has a suppressive role. Higher progesterone during pregnancy leads to autoimmune disease remission and an elevated susceptibility toward certain infectious diseases [2, 3, 4]. The intensity and prevalence of viral infections are typically higher in males, whereas disease outcome could be worse for females [5]. Sexual dimorphism of immune function is based on different concentrations of sex hormones in males and females and on a specific mediating role of these hormones in immune function and response along with differences in innate and adaptive immunity.

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