DAD3 Targets ACE2 to Inhibit the MAPK and NF-κB Signalling Pathways and Protect Against LPS-induced Inflammation in Bovine Mammary Epithelial Cells

Overview

Journal Vet Res

Publisher Biomed Central

Specialty Veterinary Medicine

Date 2022 Dec 9

PMID 36482404

Authors

Xiangjun Zhang

Fang Jia

Weiwu Ma

Xueqiang Li

Xuezhang Zhou

Affiliations

Soon will be listed here.

Abstract

The protective arm of the renin-angiotensin system (RAS), the ACE 2/Ang-(1-7)/MasR axis, has become a new anti-inflammatory target. As a specific activator of ACE2, diminazene aceturate (DA) can promote anti-inflammatory effects by regulating the ACE2/Ang-(1-7)/MasR axis. However, due to the reported toxicity of DA, its application has been limited. In the current study, we synthesized a low toxicity DA derivative 3 (DAD3) and sought to determine whether DAD3 can also activate ACE2 in bovine mammary epithelial cells (BMEC) and regulate the RAS system to inhibit inflammation. We found that both DA and DAD3 can activate and promote ACE2 expression in BMEC. iRNA-mediated knockdown of ACE2 demonstrated that DAD3 activates the ACE2/Ang-(1-7)/MasR axis and plays an anti-inflammatory role in BMEC. Furthermore, the inhibitory effects of DA and DAD3 on the protein phosphorylation of MAPK and NF-κB pathways were reduced in ACE2-silenced BMEC. Our findings show that ACE2 is a target of DAD3, which leads to inhibition of the MAPK and NF-κB signalling pathways and protects against LPS-induced inflammation in BMEC. Thus, DAD3 may provide a new strategy to treat dairy cow mastitis.

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