Hypothalamic miR-30 regulates puberty onset via repression of the puberty-suppressing factor, Mkrn3
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Citações na Scopus
48
Tipo de produção
article
Data de publicação
2019
Título da Revista
ISSN da Revista
Título do Volume
Editora
PUBLIC LIBRARY SCIENCE
Autores
HERAS, Violeta
SANGIAO-ALVARELLOS, Susana
MANFREDI-LOZANO, Maria
SANCHEZ-TAPIA, Maria J.
RUIZ-PINO, Francisco
ROA, Juan
LARA-CHICA, Maribel
MORRUGARES-CARMONA, Rosario
JOUY, Nathalie
ABREU, Ana P.
Citação
PLOS BIOLOGY, v.17, n.11, article ID e3000532, 24p, 2019
Resumo
Mkrn3, the maternally imprinted gene encoding the makorin RING-finger protein-3, has recently emerged as putative pubertal repressor, as evidenced by central precocity caused by MKRN3 mutations in humans; yet, the molecular underpinnings of this key regulatory action remain largely unexplored. We report herein that the microRNA, miR-30, with three binding sites in a highly conserved region of its 3 ' UTR, operates as repressor of Mkrn3 to control pubertal onset. Hypothalamic miR-30b expression increased, while Mkrn3 mRNA and protein content decreased, during rat postnatal maturation. Neonatal estrogen exposure, causing pubertal alterations, enhanced hypothalamic Mkrn3 and suppressed miR-30b expression in female rats. Functional in vitro analyses demonstrated a strong repressive action of miR-30b on Mkrn3 3 ' UTR. Moreover, central infusion during the juvenile period of target site blockers, tailored to prevent miR-30 binding to Mkrn3 3 ' UTR, reversed the prepubertal down-regulation of hypothalamic Mkrn3 protein and delayed female puberty. Collectively, our data unveil a novel hypothalamic miRNA pathway, involving miR-30, with a prominent role in the control of puberty via Mkrn3 repression. These findings expand our current understanding of the molecular basis of puberty and its disease states.
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Referências
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