Chemopreventive Efficacy of Salvianolic Acid B Phospholipid Complex Loaded Nanoparticles Against Experimental Oral Carcinogenesis: Implication of Sustained Drug Release

Overview

Journal Ann Transl Med

Publisher AME Publishing Company

Date 2022 Apr 11

PMID 35402586

Authors

Wei Liu

Zengtong Zhou

Laikuan Zhu

Hongquan Li

Lan Wu

Affiliations

Soon will be listed here.

Abstract

Background: Although we have previously demonstrated that phospholipid complex loaded nanoparticles (PLC-NPs) encapsulating salvianolic acid B (SAB) can enhance anticancer activity in head and neck cancer and precancerous cells , the chemopreventive efficacy of SAB-PLC-NPs (nano-SAB) remains unclear. Here, we aimed to investigate the efficacy of nano-SAB against experimental oral carcinogenesis.

Methods: Oral tongue carcinogenesis was induced in C57BL/6 mice through the administration of 4-nitroquinoline-N-oxide (4NQO, 100 µg/mL) in drinking water for 22 weeks. To preliminarily evaluate the effect of sustained drug release against oral carcinogenesis, free- or nano-SAB (16.6 mg/kg/d) was administered orally for 18 weeks, and the treatment was discontinued for the remaining 4 weeks.

Results: Histological evaluation revealed a significant (P<0.05) decrease in the incidence of carcinoma in free-SAB-treated (16.7%) and nano-SAB-treated (10.0%) mice compared to mice exposed to 4NQO alone (34.3%). A decrease in carcinoma growth rate was also observed in free-SAB-treated (12.2%) and nano-SAB-treated (5.5%) mice compared to the 4NQO-exposed group (18.3%), even after drug withdrawal for 4 weeks. Immunohistochemical analysis revealed that nano-SAB treatment effectively suppressed Ki-67, proliferative cell nuclear antigen (PCNA), and cyclin D1 expression in high-risk dysplastic lesions compared to free-SAB-treated and 4NQO-exposed groups (all P<0.05). Importantly, nano-SAB maintained low levels of Ki-67, PCNA, and cyclin D1 expression even after drug withdrawal for 4 weeks.

Conclusions: Together with our previous data, this study confirms that nano-SAB has superior chemopreventive efficacy by promoting more potent anti-proliferation and cell cycle arrest responses. These findings demonstrate the potential of SAB-PLC-NPs as promising chemopreventive agents for treating oral carcinogenesis.

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