Elsevier

Annals of Hepatology

Volume 21, March–April 2021, 100191
Annals of Hepatology

Original article
miRNA-338-3p/CAMK IIα signaling pathway prevents acetaminophen-induced acute liver inflammation in vivo

https://doi.org/10.1016/j.aohep.2020.03.003Get rights and content
Under a Creative Commons license
open access

Abstract

Introduction and objectives

N-acetyl-p-aminophenol (APAP)-induced liver injury is a major clinical challenge worldwide. The present study investigated the molecular role of microRNA (miR)-338-3p in the development of APAP-induced acute liver injury.

Materials and methods

B6 mice were treated with an miR-338-3p agomir, antagomir, and intraperitoneally injected with APAP 24 h later to induce acute liver injury. Histological analysis was performed to evaluate the degree of liver injury. The gene expression of miR-338-3p and its downstream regulators was measured by reverse transcription-quantitative PCR and western blot. The miR target was validated using a luciferase reporter assay.

Results

The results revealed that miR-338-3p was significantly upregulated following the intraperitoneal administration of APAP. Augmenting miR-338-3p alleviated acute liver injury caused by APAP overdose, while silencing of miR-338-3p exhibited a detrimental effect. Moreover, miR-338-3p inhibited the expression of pro-inflammatory cytokines by preventing the aberrant activation of inflammatory signaling pathways, including the nuclear factor kappa-B (NF-κB)/mitogen-activated protein kinase (MAPK) signaling pathway. Furthermore, calcium/calmodulin-dependent protein kinase IIα (CAMK IIα) was identified as a direct target of miR-338-3p.

Conclusion

The present study demonstrated that miR-338-3p inhibited inflammation in APAP-induced acute liver injury.

Keywords

APAP
Liver injury
Mir-338-3p
MAPK
NF-κB
CAMK IIα

Cited by (0)

1

Chen Zhang and Li Kang have contributed to this work.