Apigenin attenuates 2-deoxy-D-ribose-induced oxidative cell damage in HIT-T15 pancreatic β-cells

Biol Pharm Bull. 2012;35(1):121-6. doi: 10.1248/bpb.35.121.

Abstract

Glucose toxicity contributes to progressive β-cell failure and the development of overt diabetes. Oxidative stress is an important aspect of glucose toxicity in pancreatic β-cells. We investigated whether the flavonoid apigenin protects pancreatic β-cells from 2-deoxy-D-ribose (dRib)-induced oxidative cell damage. HIT-T15 pancreatic β-cells were cultured with or without apigenin in the presence of dRib. Time- and dose-dependent cell viability was monitored using a cell counting kit (CCK-8), while the induction of apoptosis was analyzed using a cell death enzyme-linked immunosorbent assay (ELISA) kit. Mitochondrial membrane potential (ΔΨ(m)) was determined using the JC-1 kit. Intracellular oxidative stress was measured by fluorometric analysis of DCFH oxidation using 2',7'-dichlorofluorescin diacetate (DCFH-DA) as the probe. In addition, the DNA binding activity of the oxidative stress-related transcriptional factors nuclear factor-κB (NF-κB) and activator protein 1 (AP-1) were analyzed. dRib reduced cell survival and ΔΨ(m), while it markedly increased intracellular levels of reactive oxygen species (ROS), apoptosis, and the activity of the oxidative stress-related transcription factors NF-κB and AP-1. However, pretreatment of cells with apigenin attenuated all the dRib-induced effects. The anti-oxidants, N-acetyl-L-cysteine (NAC) and alpha lipoic acid (ALA), also prevented both dRib-induced oxidative damage and activation of NF-κB and AP-1. Taken together, these results suggest that apigenin attenuates dRib-induced cell damage in pancreatic β-cells via oxidative stress-related signaling.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antioxidants / pharmacology*
  • Apigenin / pharmacology*
  • Apoptosis / drug effects
  • Cell Line
  • Cell Survival / drug effects
  • DNA / metabolism
  • Deoxyribose / adverse effects*
  • Enzyme-Linked Immunosorbent Assay
  • Glucose / toxicity*
  • Humans
  • Insulin-Secreting Cells / drug effects*
  • Membrane Potential, Mitochondrial / drug effects
  • NF-kappa B / metabolism
  • Oxidative Stress / drug effects*
  • Oxidative Stress / physiology
  • Plant Extracts / pharmacology*
  • Reactive Oxygen Species / metabolism
  • Signal Transduction / drug effects
  • Transcription Factor AP-1 / metabolism

Substances

  • Antioxidants
  • NF-kappa B
  • Plant Extracts
  • Reactive Oxygen Species
  • Transcription Factor AP-1
  • Deoxyribose
  • Apigenin
  • DNA
  • Glucose