Pharmacological activities of crocin in saffron

Shinji Soeda, Takashi Ochiai, Hiroshi Shimeno, Hiroshi Saito, Kazuho Abe, Hiroyuki Tanaka, Yukihiro Shoyama

Research output: Contribution to journalReview articlepeer-review

62 Citations (Scopus)

Abstract

The effect of crocin on improving ethanol-induced impairment of learning behaviors of mice in passive avoidance tasks is reported. Based on these results, it became evident that crocin prevents the inhibitory effect of ethanol on long-term potentiation (LTP) in the dentate gyrus in vivo. We confirmed that crocin inhibits tumor necrosis factor (TNF)-α-induced apoptosis of PC-12 cells. PC-12 cells showed a rapid increase in cellular ceramide levels, followed by an increase in the phosphorylation of c-Jun kinase (JNK), leading to apoptosis by serum/glucose deprivation in the medium. The production of ceramide was dependent on the activation of magnesium-dependent neutral sphingomyelinase (N-SMase), but not on de novo synthesis. The oxidative stress also decreased the cellular levels of glutathione (GSH), which is the potent inhibitor of N-SMase. Crocin treatment resulted in the prevention of N-SMase activation, ceramide production and JNK phosphorylation. Exploration of the crocin's preventive mechanism in oxidative stress-induced cell death revealed that the activities of GSH reductase and γ-glutamylcysteinyl synthase (γ-GCS) in the γ-glutamyl cycle affected the stable GSH supply that blocks the activation of N-SMase. These results strongly support the importance of the proposed GSH-dependent inhibitory mechanism in oxidative stress-mediated cell death.

Original languageEnglish
Pages (from-to)102-111
Number of pages10
JournalJournal of Natural Medicines
Volume61
Issue number2
DOIs
Publication statusPublished - Apr 1 2007

All Science Journal Classification (ASJC) codes

  • Pharmaceutical Science
  • Drug Discovery
  • Complementary and alternative medicine
  • Organic Chemistry

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