MicroRNA let-7d targets thrombospondin-1 and inhibits the activation of human pancreatic stellate cells.
Pancreatology
; 19(1): 196-203, 2019 Jan.
Article
em En
| MEDLINE
| ID: mdl-30393009
ABSTRACT
OBJECTIVES:
The microRNA (miRNA) let-7d is linked to the formation of pancreatic cancer-related fibrosis. In this study, the mechanism by which let-7d regulates the activation of the human pancreatic stellate cell (hPSC) was evaluated.METHODS:
The transient transfection of a let-7d mimic in the hPSCs was performed, and the altered thrombospondin 1 (THBS1) expression was confirmed by western blotting and real-time qPCR. Targeting of the 3'-untranslated region (UTR) of THBS1 by let-7d was investigated by the luciferase assays. After hPSC transfection using THBS1 siRNA, the fibrosis markers (α-SMA and collagen 1A1) were evaluated by western blotting and real-time qPCR. The correlation between tumor fibrosis and let-7d or THBS1 was estimated using the data from The Cancer Genome Atlas project. Finally, the effects of genistein on the hPSCs were evaluated.RESULTS:
We found that a let-7d mimic inhibits THBS1 expression by targeting its 3'-UTR. THBS1 inhibition by siRNA inhibited hPSC activation. An in silico analysis revealed that let-7d and THBS1 expression are negatively correlated. Additionally, let-7d was negatively correlated with the stromal score, while THBS1 was positively correlated with this score. Genistein substantially induced let-7d and decreased the expression of fibrosis marker along with the inhibition of THBS1.CONCLUSIONS:
Let-7d inhibited hPSC activation by targeting THBS1. Genistein induced the expression of let-7d and might modulate pancreatic fibrosis.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Trombospondina 1
/
MicroRNAs
/
Células Estreladas do Pâncreas
Limite:
Humans
Idioma:
En
Revista:
Pancreatology
Assunto da revista:
ENDOCRINOLOGIA
/
GASTROENTEROLOGIA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Japão