Polysaccharides Produced by the Mushroom Trametes robiniophila Murr Boosts the Sensitivity of Hepatoma Cells to Oxaliplatin via the miR-224-5p/ABCB1/P-gp Axis

  • Integr Cancer Ther. 2022 Jan-Dec;21:15347354221090221. doi: 10.1177/15347354221090221.
Yudong Gou  1 ,  Xia Zheng  1 ,  Wenming Li  2 ,  Hongyu Deng  3 ,  Shukui Qin  1  2
Affiliations
  • 1. Nanjing University of Chinese Medicine, Nanjing, China.
  • 2. Nanjing Jinling Hospital: East Region Military Command General Hospital, Nanjing, China.
  • 3. Guangzhou University of Chinese Medicine, Guangzhou, China.
PMID: 35426328 DOI: 10.1177/15347354221090221
Abstract

Aim: To investigate the mechanisms employed by PS-T (Polysaccharides of Trametes, PS-T), the main active ingredient of Huaier granules, to improve the susceptibility of hepatoma cells to oxaliplatin (OXA).

Methods: Cell proliferation in response to PS-T was determined both in vitro and in vivo. The effects of PS-T on miRNAs were analyzed with the use of a microarray. MiRNAs were screened under specific conditions (P < .05, logFoldChange > ABS [1.5]) and further silenced or overexpressed by Liposome transfection. Levels of ABCB1 mRNA and P-gp were detected by qRT-PCR and western blot analysis, respectively. A dual fluorescence assay was performed to determine whether miRNA directly targets ABCB1.

Results: PS-T enhanced the inhibitory effect of OXA in human hepatoma cells and xenografts. Among 5 up-regulated miRNAs, overexpression of only miR-224-5p inhibited the expression of ABCB1 mRNA and P-gp, while silencing of miR-224-5p had an opposite effect. Moreover, miR-224-5p can directly target the 3'-UTR of ABCB1.

Conclusion: PS-T increases the sensitivity of human hepatoma cells to OXA via the miR-224-5p/ABCB1/P-gp axis.

Keywords
Trametes robiniophila Murr; chemotherapy resistance; hepatocellular carcinoma; miR-224-5p; microRNA array.
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