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[Effect of seven kinds of flavonoids on recombinant human protein tyrosine phosphatase]

Tai-ping He1, Nian-ci Liang, Xiao-cong Lin

  • 1Institute of Biochemistry and Molecular Biology, Guangdong Medical College, Zhanjiang 524023, China. taipinghe@163.com

Zhong Yao Cai = Zhongyaocai = Journal of Chinese Medicinal Materials
|September 30, 2010
PubMed
Abstract

Insights

Myricetin and gossypin strongly inhibit phosphatase of regenerating liver-3 (PRL-3) activity. This study identifies key flavonoid structures for developing novel PRL-3 inhibitors.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Context:

  • Phosphatase of regenerating liver-3 (PRL-3) is a protein tyrosine phosphatase implicated in cancer metastasis.
  • Targeting PRL-3 activity presents a potential therapeutic strategy for inhibiting cancer progression.

Purpose:

  • To investigate the inhibitory effects of seven distinct flavonoids on recombinant human PRL-3 activity.
  • To determine the structure-activity relationships of flavonoids influencing PRL-3 inhibition.

Summary:

  • Myricetin and gossypin demonstrated significant, dose-dependent inhibition of PRL-3, with IC50 values of 55.54 and 68.86 µmol/L, respectively.
  • Quercetin, luteolin, and 7,8-dihydroxyflavone exhibited weaker inhibition, while 3-hydroxyflavone and 6-hydroxyflavone showed no significant effect.
  • The presence of hydroxyl groups at the C4 and C7 positions of the flavone skeleton was crucial for PRL-3 inhibitory activity, with increased hydroxyl numbers correlating with enhanced inhibition.

Impact:

  • Identifies myricetin and gossypin as potent inhibitors of human PRL-3.
  • Provides insights into the structural requirements for flavonoid-based PRL-3 inhibitors.
  • Suggests potential for developing novel anti-cancer therapeutics targeting PRL-3.

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