Lv F, Wang Z, Huang Y, Si A, Chen Y. CLEC3B protects H9c2 cardiomyocytes from apoptosis caused by hypoxia via the PI3K/Akt pathway.
ACTA ACUST UNITED AC 2020;
53:e9693. [PMID:
32696821 PMCID:
PMC7372944 DOI:
10.1590/1414-431x20209693]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 06/02/2020] [Indexed: 01/04/2023]
Abstract
Ischemic heart disease (IHD) is one of the leading causes of death worldwide.
C-type lectin domain family 3 member B (CLEC3B) is a C-type lectin superfamily
member and is reported to promote tissue remodeling. The serum levels of CLEC3B
are downregulated in patients with cardiovascular disease. However, the
molecular mechanisms of CLEC3B in IHD is not well-characterized. Therefore, we
overexpressed CLEC3B and silenced CLEC3B in H9c2 rat cardiomyocytes for the
first time. We then constructed a model of IHD in vitro through
culturing H9c2 cardiomyocytes in serum-free medium under oxygen-deficit
conditions. Then, Cell Counting Kit-8 (CCK-8), flow cytometry, qRT-PCR, and
western blot assays were performed to investigate cell viability, apoptosis, and
expression levels of CLEC3B, phosphatidylinositol 3-kinase (PI3K),
phosphorylated PI3K (p-PI3K), protein kinase B (Akt), phosphorylated Akt
(p-Akt), and cleaved-caspase 3. We observed that the mRNA expression of CLEC3B
was decreased in hypoxic H9c2 cardiomyocytes (P<0.05). Overexpression of
CLEC3B increased cell viability (P<0.01), inhibited cell apoptosis
(P<0.05), upregulated the levels of p-PI3K/PI3K and p-Akt/Akt (P<0.01 or
P<0.05), and downregulated expression of cleaved-caspase 3 (P<0.001) in
hypoxic H9c2 cardiomyocytes while silencing of CLEC3B caused the opposite
results. Inhibition of the PI3K/Akt pathway reversed the protective effect of
CLEC3B on hypoxic H9c2 cardiomyocytes. Our study demonstrated that CLEC3B
alleviated the injury of hypoxic H9c2 cardiomyocytes via the PI3K/Akt
pathway.
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