Refereed journal article or data article (A1)
Hypothalamic miR-30 regulates puberty onset via repression of the puberty-suppressing factor, Mkrn3
List of Authors: Violeta Heras, Susana Sangiao-Alvarellos, Maria Manfredi-Lozano, María J. Sanchez-Tapia, Francisco Ruiz-Pino, Juan Roa, Maribel Lara-Chica, Rosario Morrugares-Carmona, Nathalie Jouy, Ana P. Abreu, Vincent Prevot, Denise Belsham, Maria J. Vazquez, Marco A. Calzado, Leonor Pinilla, Francisco Gaytan, Ana C. Latronico, Ursula B. Kaiser, Juan M. Castellano, Manuel Tena-Sempere
Publisher: PUBLIC LIBRARY SCIENCE
Publication year: 2019
Journal: PLoS Biology
Journal name in source: PLOS BIOLOGY
Journal acronym: PLOS BIOL
Volume number: 17
Issue number: 11
Number of pages: 24
ISSN: 1544-9173
eISSN: 1545-7885
DOI: http://dx.doi.org/10.1371/journal.pbio.3000532
URL: https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3000532
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/45140280
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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