[Effects of catalpol, L-shikonin and paeonol extracted from radix rehmanniae, radix arnebiae and cortex moutan on KGF-induced HaCaT cell proliferation].

Objective: To explore the effects of Chinese herbal medicine radix rehmanniae, radix arnebiae and cortex moutan on the proliferation of HaCaT cells and explore their potential curative mechanisms.

Methods: The main monomers of catalpol, l-shikonin and paeonol were extracted. And 10 ng/ml keratinocyte growth factor (KGF) was used to induce HaCaT cell to build an in vitro model of hyperproliferation of epidermal keratinocytes. CCK-8 assay and flow cytometry were applied to examine the effects of herbal monomers on cell proliferation and cell cycle.

Results: Both l-shikonin ( ≥ 10(-6) mol/L) and paeonol ( ≥ 1.88×10(-4) mol/L) inhibited cell proliferation while catalpol ( ≥ 10(-6) mol/L) enhanced cell proliferation.L-shikonin ( ≥ 10(-6) mol/L) and paeonol ( ≥ 1.88×10(-4) mol/L) inhibited the HaCaT cell during S and G2M phases while catalpol ( ≥ 10(-6) mol/L) enhanced HaCaT cell during S phase but not G2M phase.

Conclusion: L-shikonin and paeonol inhibits the proliferation of HaCaT cells while catalpol has opposite effects.