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Oestradiol synthesized by female neurons generates sex differences in neuritogenesis.


ABSTRACT: Testosterone produced by the foetal testis is converted by male neurons to oestradiol, which masculinizes neuronal morphology. Female neurons are known to synthesize oestradiol in absence of exogenous testosterone. However, the role of neuronal oestradiol on the differentiation of foetal female neurons is unknown. Here we show that, due to endogenous neuronal oestradiol synthesis, female hippocampal neurons have higher expression of the neuritogenic protein Neurogenin 3 and enhanced neuritogenesis than males. Exogenous application of testosterone or its metabolite dihydrotestosterone increases Neurogenin 3 expression and promotes neuritogenesis in males, but reduces these parameters in females. Together our data indicate that gonadal-independent oestradiol synthesis by female neurons participates in the generation of sex differences in hippocampal neuronal development.

SUBMITTER: Ruiz-Palmero I 

PROVIDER: S-EPMC4995407 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature

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Oestradiol synthesized by female neurons generates sex differences in neuritogenesis.

Ruiz-Palmero Isabel I   Ortiz-Rodriguez Ana A   Melcangi Roberto Cosimo RC   Caruso Donatella D   Garcia-Segura Luis M LM   Rune Gabriele M GM   Arevalo Maria-Angeles MA  

Scientific reports 20160824


Testosterone produced by the foetal testis is converted by male neurons to oestradiol, which masculinizes neuronal morphology. Female neurons are known to synthesize oestradiol in absence of exogenous testosterone. However, the role of neuronal oestradiol on the differentiation of foetal female neurons is unknown. Here we show that, due to endogenous neuronal oestradiol synthesis, female hippocampal neurons have higher expression of the neuritogenic protein Neurogenin 3 and enhanced neuritogenes  ...[more]

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