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Bacterial Genotoxin-Coated Nanoparticles for Radiotherapy Sensitization in Prostate Cancer.

ABSTRACT: Prostate cancer (PCa) is one of the most commonly diagnosed cancers in men and usually becomes refractory because of recurrence and metastasis. CD44, a transmembrane glycoprotein, serves as a receptor for hyaluronic acid (HA). It has been found to be abundantly expressed in cancer stem cells (CSCs) that often exhibit a radioresistant phenotype. Cytolethal distending toxin (CDT), produced by Campylobacter jejuni, is a tripartite genotoxin composed of CdtA, CdtB, and CdtC subunits. Among the three, CdtB acts as a type I deoxyribonuclease (DNase I), which creates DNA double-strand breaks (DSBs). Nanoparticles loaded with antitumor drugs and specific ligands that recognize cancerous cell receptors are promising methods to overcome the therapeutic challenges. In this study, HA-decorated nanoparticle-encapsulated CdtB (HA-CdtB-NPs) were prepared and their targeted therapeutic activity in radioresistant PCa cells was evaluated. Our results showed that HA-CdtB-NPs sensitized radioresistant PCa cells by enhancing DSB and causing G2/M cell-cycle arrest, without affecting the normal prostate epithelial cells. HA-CdtB-NPs possess maximum target specificity and delivery efficiency of CdtB into the nucleus and enhance the effect of radiation in radioresistant PCa cells. These findings demonstrate that HA-CdtB-NPs exert target specificity accompanied with radiomimetic activity and can be developed as an effective strategy against radioresistant PCa.

SUBMITTER: Chen YA

PROVIDER: S-EPMC7913852 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Bacterial Genotoxin-Coated Nanoparticles for Radiotherapy Sensitization in Prostate Cancer.

Chen Yu-An YA Lai Yi-Ru YR Wu Hui-Yu HY Lo Yen-Ju YJ Chang Yu-Fang YF Hung Chiu-Lien CL Lin Chun-Jung CJ Lo U-Ging UG Lin Ho H Hsieh Jer-Tsong JT Chiu Cheng-Hsun CH Lin Yu-Hsin YH Lai Chih-Ho CH

Biomedicines 20210204 2

Prostate cancer (PCa) is one of the most commonly diagnosed cancers in men and usually becomes refractory because of recurrence and metastasis. CD44, a transmembrane glycoprotein, serves as a receptor for hyaluronic acid (HA). It has been found to be abundantly expressed in cancer stem cells (CSCs) that often exhibit a radioresistant phenotype. Cytolethal distending toxin (CDT), produced by <i>Campylobacter jejuni</i>, is a tripartite genotoxin composed of CdtA, CdtB, and CdtC subunits. Among th ...[more]

PMID: 33557143

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Dataset Information

Bacterial Genotoxin-Coated Nanoparticles for Radiotherapy Sensitization in Prostate Cancer.

Publications

Bacterial Genotoxin-Coated Nanoparticles for Radiotherapy Sensitization in Prostate Cancer.

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