Anti-proliferative effect of licochalcone A on vascular smooth muscle cells

Jin Hee Park, Hyun Joung Lim, Kuy Sook Lee, Seahyoung Lee, Hyun Jeong Kwak, Jeong Heon Cha, Hyun Young Park

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24 Citations (Scopus)


Licochalcone A, a flavonoid found in licorice root (Glycyrrhiza glabra), is known for its anti-microbial activity and its reported ability to inhibit cancer cell proliferation. In the present study, we investigated whether licochalcone A inhibits rat vascular smooth muscle cell (rVSMC) proliferation. Our data indicate that 5 μM licochalcone A inhibited platelet-derived growth factor (PDGF)-induced rVSMC proliferation, possibly through its ability to block the progression of the cell cycle from G1 to S phase. In addition, 5 μM licochalcone A significantly inhibited the PDGF-induced expression of cyclin A, cyclin D1, CDK2, and CDK4, and the phosphorylation of Rb. Licochalcone A also reversed the decrease in p27kip1 expression reduced by PDGF. Finally, licochalcone A inhibited the PDGF-induced activation of extracellular signal-regulated kinase (ERK)1/2. Together, these data provide the first evidence that licochalcone A can regulate rVSMC proliferation and suggest that licochalcone A inhibits the proliferation of rVSMCs by suppressing the PDGF-induced activation of the ERK1/2 pathway and Rb phosphorylation, resulting in cell cycle arrest.

Original languageEnglish
Pages (from-to)1996-2000
Number of pages5
JournalBiological and Pharmaceutical Bulletin
Issue number11
Publication statusPublished - 2008 Nov

All Science Journal Classification (ASJC) codes

  • Pharmacology
  • Pharmaceutical Science


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