scholarly journals Pubertal activation of estrogen receptor α in the medial amygdala is essential for the full expression of male social behavior in mice

2016 ◽  
Vol 113 (27) ◽  
pp. 7632-7637 ◽  
Author(s):  
Kazuhiro Sano ◽  
Mariko Nakata ◽  
Sergei Musatov ◽  
Masahiro Morishita ◽  
Toshiro Sakamoto ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Sexual Behaviors ◽  
Social Behaviors ◽  
Estrogen Receptor Α ◽  
Medial Amygdala ◽  
Male Mice ◽  
Aggressive Behaviors ◽  
Intact Male ◽  
Male Type ◽  
Full Expression

Testosterone plays a central role in the facilitation of male-type social behaviors, such as sexual and aggressive behaviors, and the development of their neural bases in male mice. The action of testosterone via estrogen receptor (ER) α, after being aromatized to estradiol, has been suggested to be crucial for the full expression of these behaviors. We previously reported that silencing of ERα in adult male mice with the use of a virally mediated RNAi method in the medial preoptic area (MPOA) greatly reduced sexual behaviors without affecting aggressive behaviors whereas that in the medial amygdala (MeA) had no effect on either behavior. It is well accepted that testosterone stimulation during the pubertal period is necessary for the full expression of male-type social behaviors. However, it is still not known whether, and in which brain region, ERα is involved in this developmental effect of testosterone. In this study, we knocked down ERα in the MeA or MPOA in gonadally intact male mice at the age of 21 d and examined its effects on the sexual and aggressive behaviors later in adulthood. We found that the prepubertal knockdown of ERα in the MeA reduced both sexual and aggressive behaviors whereas that in the MPOA reduced only sexual, but not aggressive, behavior. Furthermore, the number of MeA neurons was reduced by prepubertal knockdown of ERα. These results indicate that ERα activation in the MeA during the pubertal period is crucial for male mice to fully express their male-type social behaviors in adulthood.

Membrane estrogen receptor α is essential for estrogen signaling in the male skeleton

2018 ◽  
Vol 239 (3) ◽  
pp. 303-312 ◽  
Author(s):  
H H Farman ◽  
K L Gustafsson ◽  
P Henning ◽  
L Grahnemo ◽  
V Lionikaite ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Estrogen Receptor Α ◽  
Estrogen Signaling ◽  
Areal Bone Mineral Density ◽  
Male Mice ◽  
Mineral Density ◽  
Intact Male ◽  
Trabecular Thickness ◽  
Total Body

The importance of estrogen receptor α (ERα) for the regulation of bone mass in males is well established. ERα mediates estrogenic effects both via nuclear and membrane-initiated ERα (mERα) signaling. The role of mERα signaling for the effects of estrogen on bone in male mice is unknown. To investigate the role of mERα signaling, we have used mice (Nuclear-Only-ER; NOER) with a point mutation (C451A), which results in inhibited trafficking of ERα to the plasma membrane. Gonadal-intact male NOER mice had a significantly decreased total body areal bone mineral density (aBMD) compared to WT littermates at 3, 6 and 9 months of age as measured by dual-energy X-ray absorptiometry (DEXA). High-resolution microcomputed tomography (µCT) analysis of tibia in 3-month-old males demonstrated a decrease in cortical and trabecular thickness in NOER mice compared to WT littermates. As expected, estradiol (E2) treatment of orchidectomized (ORX) WT mice increased total body aBMD, trabecular BV/TV and cortical thickness in tibia compared to placebo treatment. E2 treatment increased these skeletal parameters also in ORX NOER mice. However, the estrogenic responses were significantly decreased in ORX NOER mice compared with ORX WT mice. In conclusion, mERα is essential for normal estrogen signaling in both trabecular and cortical bone in male mice. Increased knowledge of estrogen signaling mechanisms in the regulation of the male skeleton may aid in the development of new treatment options for male osteoporosis.

scholarly journals Effects of Prepubertal or Adult Site-Specific Knockdown of Estrogen Receptor β in the Medial Preoptic Area and Medial Amygdala on Social Behaviors in Male Mice

eNeuro ◽  
2016 ◽  
Vol 3 (2) ◽  
pp. ENEURO.0155-15.2016 ◽  
Author(s):  
Mariko Nakata ◽  
Kazuhiro Sano ◽  
Sergei Musatov ◽  
Naoko Yamaguchi ◽  
Toshiro Sakamoto ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Preoptic Area ◽  
Social Behaviors ◽  
Medial Preoptic Area ◽  
Estrogen Receptor Β ◽  
Medial Amygdala ◽  
Male Mice ◽  
Site Specific

scholarly journals Health benefits attributed to 17α-estradiol, a lifespan-extending compound, are mediated through estrogen receptor α

2020 ◽  
Author(s):  
Shivani N. Mann ◽  
Niran Hadad ◽  
Molly Nelson-Holte ◽  
Alicia R. Rothman ◽  
Roshini Sathiaseelan ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Chronic Diseases ◽  
Transcriptional Activation ◽  
Estrogen Receptor Α ◽  
Metabolic Parameters ◽  
Metabolic Effects ◽  
Male Rats ◽  
Male Mice ◽  
Dietary Interventions ◽  
Estradiol Treatment

ABSTRACTMetabolic dysfunction underlies several chronic diseases, many of which are exacerbated by obesity. Dietary interventions can reverse metabolic declines and slow aging, although compliance issues remain paramount. 17α-estradiol treatment improves metabolic parameters and slows aging in male mice. The mechanisms by which 17α-estradiol elicits these benefits remain unresolved. Herein, we show that 17α-estradiol elicits similar genomic binding and transcriptional activation through estrogen receptor α (ERα) to that of 17β-estradiol. In addition, we show that the ablation of ERα completely attenuates the beneficial metabolic effects of 17α-E2 in male mice. Our findings suggest that 17α-E2 acts primarily through the liver and hypothalamus to improve metabolic parameters in male mice. Lastly, we also determined that 17α-E2 improves metabolic parameters in male rats, thereby proving that the beneficial effects of 17α-E2 are not limited to mice. Collectively, these studies suggest ERα may be a drug target for mitigating chronic diseases in male mammals.

scholarly journals Testosterone Prevents Cutaneous Ischemia and Necrosis in Males Through Complementary Estrogenic and Androgenic Actions

2017 ◽  
Vol 37 (5) ◽  
pp. 909-919 ◽  
Author(s):  
Caroline Chenu ◽  
Marine Adlanmerini ◽  
Frederic Boudou ◽  
Elodie Chantalat ◽  
Anne-Laure Guihot ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Direct Action ◽  
Skin Flap ◽  
Treatment Strategies ◽  
Estrogen Receptor Α ◽  
Male Mice ◽  
Resistance Arteries ◽  
Estradiol Treatment ◽  
Impaired Wound Healing ◽  
17Β Estradiol

Objective— Chronic nonhealing wounds are a substantial medical concern and are associated with morbidity and mortality; thus, new treatment strategies are required. The first step toward personalized/precision medicine in this field is probably in taking sex differences into account. Impaired wound healing is augmented by ischemia, and we previously demonstrated that 17β-estradiol exerts a major preventive effect against ischemia-induced skin flap necrosis in female mice. However, the equivalent effects of testosterone in male mice have not yet been reported. We then investigated the role of steroid hormones in male mice using a skin flap ischemia model. Approach and Results— Castrated male mice developed skin necrosis after ischemia, whereas intact or castrated males treated with testosterone were equally protected. Testosterone can (1) activate the estrogen receptor after its aromatization into 17β-estradiol or (2) be reduced into dihydrotestosterone, a nonaromatizable androgen that activates the androgen receptor. We found that dihydrotestosterone protected castrated wild-type mice by promoting skin revascularization, probably through a direct action on resistance arteries, as evidenced using a complementary model of flow-mediated outward remodeling. 17β-estradiol treatment of castrated male mice also strongly protected them from ischemic necrosis through the activation of estrogen receptor-α by increasing skin revascularization and skin survival. Remarkably, 17β-estradiol improved skin survival with a greater efficiency than dihydrotestosterone. Conclusions— Testosterone provides males with a strong protection against cutaneous necrosis and acts through both its estrogenic and androgenic derivatives, which have complementary effects on skin survival and revascularization.

Obesity and Disturbed Lipoprotein Profile in Estrogen Receptor-α-Deficient Male Mice

2000 ◽  
Vol 278 (3) ◽  
pp. 640-645 ◽  
Author(s):  
Claes Ohlsson ◽  
Nina Hellberg ◽  
Paolo Parini ◽  
Olle Vidal ◽  
Mohammed Bohlooly ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Estrogen Receptor Α ◽  
Lipoprotein Profile ◽  
Male Mice

scholarly journals Estrogen Stimulation of Kiss1 Expression in the Medial Amygdala Involves Estrogen Receptor-α But Not Estrogen Receptor-β

Endocrinology ◽  
2016 ◽  
Vol 157 (10) ◽  
pp. 4021-4031 ◽  
Author(s):  
Shannon B. Z. Stephens ◽  
Navdeep Chahal ◽  
Nagambika Munaganuru ◽  
Ruby A. Parra ◽  
Alexander S. Kauffman
Keyword(s):  
Estrogen Receptor ◽  
Estrogen Receptor Α ◽  
Estrogen Receptor Β ◽  
Medial Amygdala ◽  
Estrogen Stimulation ◽  
Stimulation Of
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