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Laboratory Investigation

Laboratory Investigation

IF: 4.2
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MAT1A Suppression by the CTBP1/HDAC1/HDAC2 Transcriptional Complex Induces Immune Escape and Reduces Ferroptosis in Hepatocellular Carcinoma.

Published:1 August 2023 DOI: 10.1016/j.labinv.2023.100180 PMID: 37230466
Yaqin Li , Guoxin Hu , Furong Huang , Mingtai Chen , Yihua Chen , Youhua Xu , Guangdong Tong

Abstract

Hepatocellular carcinoma (HCC) remains a significant health burden globally due to its high prevalence and morbidity. C-terminal–binding protein 1 (CTBP1) is a transcriptional corepressor that modulates gene transcription by interacting with transcription factors or chromatin-modifying enzymes. High CTBP1 expression has been associated with the progression of various human cancers. In this study, bioinformatics analysis suggested the existence of a CTBP1/histone deacetylase 1 (HDAC1)/HDAC2 transcriptional complex that regulates the expression of methionine adenosyltransferase 1A (MAT1A), whose loss has been associated with ferroptosis suppression and HCC development. Thus, this study aims to investigate the interactions between the CTBP1/HDAC1/HDAC2 complex and MAT1A and their roles in HCC progression. First, high expression of CTBP1 was observed in HCC tissues and cells, where it promoted HCC cell proliferation and mobility while inhibiting cell apoptosis. CTBP1 interacted with HDAC1 and HDAC2 to suppress the MAT1A transcription, and silencing of either HDAC1 or HDAC2 or overexpression of MAT1A led to the inhibition of cancer cell malignancy. In addition, MAT1A overexpression resulted in increased S-adenosylmethionine levels, which promoted ferroptosis of HCC cells directly or indirectly by increasing CD8+ T-cell cytotoxicity and interferon-γ production. In?vivo, MAT1A overexpression suppressed growth of CTBP1-induced xenograft tumors in mice while enhancing immune activity and inducing ferroptosis. However, treatment with ferrostatin-1, a ferroptosis inhibitor, blocked the tumor-suppressive effects of MAT1A. Collectively, this study reveals that the CTBP1/HDAC1/HDAC2 complex–induced MAT1A suppression is liked to immune escape and reduced ferroptosis of HCC cells.

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Materials
Procduct Name CAS Molecular Formula Supplier Price
(E)-N-[4-[N-(3-Methoxypyrazin-2-yl)sulfaMoyl]phenyl]-3-(5-nitrothiophene-2-yl)acrylaMide 432531-71-0 C18H15N5O6S2 57 suppliers $16.00-$3068.00
(E)-N-[4-[N-(3-Methoxypyrazin-2-yl)sulfaMoyl]phenyl]-3-(5-nitrothiophene-2-yl)acrylaMide 432531-71-0 C18H15N5O6S2 57 suppliers $16.00-$3068.00
(E)-N-[4-[N-(3-Methoxypyrazin-2-yl)sulfaMoyl]phenyl]-3-(5-nitrothiophene-2-yl)acrylaMide 432531-71-0 C18H15N5O6S2 57 suppliers $16.00-$3068.00
(E)-N-[4-[N-(3-Methoxypyrazin-2-yl)sulfaMoyl]phenyl]-3-(5-nitrothiophene-2-yl)acrylaMide 432531-71-0 C18H15N5O6S2 57 suppliers $16.00-$3068.00

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