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Rab4b Promotes Cytolethal Distending Toxin from -Induced Cytotoxicity in PK-15 Cells

Overview
Journal Toxins (Basel)
Publisher MDPI
Specialty Toxicology
Date 2024 Sep 27
PMID 39330865
Authors
Affiliations
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Abstract

cytolethal distending toxin (CDT) can induce cell cycle arrest and apoptosis. Our laboratory's previous work demonstrated that GTPase 4b (Rab4b) is a key host protein implicated in CDT-induced cytotoxicity. This study investigated the probable involvement of Rab4b in the process. Our study used CRISPR/Cas9 technology to create a Rab4b-knockout cell line. The results showed greater resistance to CDT-induced cell cytotoxicity. In contrast, forced Rab4b overexpression increased CDT-induced cytotoxicity. Further immunoprecipitation study reveals that CDT may bind with Rab4b. In PK-15 cells, CDT is transported to the early endosomes and late endosomes, while after knocking out Rab4b, CDT cannot be transported to the early endosome via vesicles. Rab4b appears essential for CDT-induced cytotoxicity in PK-15 cells.

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