Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Deficiency of MicroRNA miR-1954 Promotes Cardiac Remodeling and Fibrosis

Texto completo
Autor(es):
Chiasson, Valorie [1] ; Takano, Ana Paula Cremasco [1, 2] ; Guleria, Rakeshwar S. [1, 3] ; Gupta, Sudhiranjan [4, 1, 3]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Texas A&M Univ, Dept Med Physiol, Temple, TX - USA
[2] Univ Sao Paulo, Dept Anat ICB, Sao Paulo - Brazil
[3] VISN 17 Ctr Excellence Returning War Vet, Waco, TX - USA
[4] Baylor Univ, Dept Biol, Waco, TX 76706 - USA
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF THE AMERICAN HEART ASSOCIATION; v. 8, n. 21 NOV 5 2019.
Citações Web of Science: 0
Resumo

Background-Cardiac fibrosis occurs because of disruption of the extracellular matrix network leading to myocardial dysfunction. Angiotensin II (AngII) has been implicated in the development of cardiac fibrosis. Recently, microRNAs have been identified as an attractive target for therapeutic intervention in cardiac pathologies; however, the underlying mechanism of microRNAs in cardiac fibrosis remains unclear. Next-generation sequencing analysis identified a novel characterized microRNA, miR-1954, that was significantly reduced in AngII-infused mice. The finding led us to hypothesize that deficiency of miR-1954 triggers cardiac fibrosis. Methods and Results-A transgenic mouse was created using a-MHC (a-myosin heavy chain) promoter and was challenged with AngII infusion. AngII induced cardiac hypertrophy and remodeling. The in vivo overexpression of miR-1954 showed significant reduction in cardiac mass and blood pressure in AngII-infused mice. Further analysis showed significant reduction in cardiac fibrotic genes, hypertrophy marker genes, and an inflammatory gene and restoration of a calcium-regulated gene (Atp2a2 {[}ATPase sarcoplasmic/endoplasmic reticulum Ca2+ transporting 2]; also known as SERCA2), but no changes were observed in apoptotic genes. THBS1 (thrombospondin 1) is indicated as a target gene for miR-1954. Conclusions-Our findings provide evidence, for the first time, that miR-1954 plays a critical role in cardiac fibrosis by targeting THBS1. We conclude that promoting the level of miR-1954 would be a promising strategy for the treatment of cardiac fibrosis. (AU)

Processo FAPESP: 15/01166-5 - Efeito da inibição de NF-kB na hipertrofia cardíaca induzida pelo hormônio tiroideano
Beneficiário:Ana Paula Cremasco Takano
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado