Rice husk silica liquid protects pancreatic β cells from streptozotocin-induced oxidative damage

Hsin Yuan Chen, Yi Fen Chiang, Kai Lee Wang, Tsui Chin Huang, Mohamed Ali, Tzong Ming Shieh, Hsin Yi Chang, Yong Han Hong, Shih Min Hsia

Research output: Contribution to journalArticlepeer-review

Abstract

Type 2 diabetes mellitus is a complex multifactorial disease characterized by insulin resistance and dysfunction of pancreatic β-cells. Rice husk silica liquid (RHSL) is derived from rice husks and has not been explored in diabetes mellitus until now. Previous studies showed that rice husk is enriched with silica, and its silica nanoparticles are higher more biocompatible. To investi-gate the potential protective role of RHSL on pancreatic β cells, we utilized RIN-m5F pancreatic β cells and explored RHSL effect after streptozotocin (STZ)-stimulation. The recovery effects of RHSL were evaluated using flow cytometry, Western blotting, and immunofluorescence analysis. Results of our study showed that RHSL reversed the cell viability, insulin secretion, reactive oxygen species (ROS) production, and the change of mitochondria membrane potential (ΔΨm) in STZ-treated RIN-m5F cells. Moreover, the expression of phospho-receptor-interacting protein 3 (p-RIP3) and cleaved-poly (ADP-ribose) polymerase (PARP), phospho-mammalian target of rapamycin (p-mTOR), and sequestosome-1 (p62/SQSTM1) were significantly decreased, while the transition of light chain (LC)3-I to LC3-II was markedly increased after RHSL treatment in STZ-induced RIN-m5F cells. Interestingly, using autophagy inhibitors such as 3-methyladenine (3-MA) and chloro-quine (CQ) both showed an increase in cleaved-PARP protein level, indicating apoptosis induction. Taken together, this study demonstrated that RHSL induced autophagy and alleviated STZ-in-duced ROS-mediated apoptosis in RIN-m5F cells.

Original languageEnglish
Article number1080
JournalAntioxidants
Volume10
Issue number7
DOIs
Publication statusPublished - Jul 2021

Keywords

  • Apoptosis
  • Autoph-agy
  • Pancreatic β cell
  • Reactive oxygen species
  • Rice husk silica liquid
  • Streptozotocin

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Molecular Biology
  • Clinical Biochemistry
  • Cell Biology

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