ZHANG Li-hong, FU Yun, LIAO Jian, et al. Effect of Liquiritin on UVB-induced Apoptosis of Human Keratinocytes[J]. Chinese journal of experimental traditional medical formulae, 2018, 24(6): 96-101.
DOI:
ZHANG Li-hong, FU Yun, LIAO Jian, et al. Effect of Liquiritin on UVB-induced Apoptosis of Human Keratinocytes[J]. Chinese journal of experimental traditional medical formulae, 2018, 24(6): 96-101. DOI: 10.13422/j.cnki.syfjx.20180696.
Effect of Liquiritin on UVB-induced Apoptosis of Human Keratinocytes
Objective: To investigate the effects of liquiritin on ultraviolet B (UVB)-induced apoptosis of human keratinocytes (HaCaT cells).Method: Different concentrations of liquiritinwere used to treat HaCaT cells
and the methyl thiazolyltetrazolium(MTT) assay was used to screen the effective and safe concentration of liquiritin;light aging model was set up by the irradiation of ultraviolet radiation B (UVB) at irradiation dose of 30 mJ · cm-2. Then the activity of cells was determined by MTT method;the content of reactive oxygen species (ROS) and the apoptosis of HaCaT cells were respectively measured by flow cytometry;the expression levels of cysteinyl aspartate-3(Caspase-3) and cysteinyl aspartate-9(Caspase-9) mRNA were determined by Real-time PCR method; and Western blot method was used to detect the effects of liquiritin on B-cell lymphoma 2(Bcl-2)
Caspase-3 and Caspase-9 protein expression.Result: The optimal safe and effective concentrations of liquiritin were 1×10-7
1×10-6
and 1×10-5 mol · L-1. As compared with the blank group
the cell proliferation rate was significantly decreased in the UVB group (P<0.01);the content of ROS and the total apoptosis rate of cells were significantly increased(P<0.01); the expression levels of Caspase-3 and Caspase-9 mRNA were significantly increased (P<0.01);the expression level of Bcl-2 protein was significantly decreased (P<0.01)
and the expression levels of Caspase-3 and Caspase-9 protein were significantly increased (P<0.01). As compared with the UVB group
the cell proliferation rate of the (1×10-7
1×10-6
and 1×10-5) mol · L-1liquiritin+UVB groups were significantly increased (P<0.01);the content of ROS and the total apoptosis rate of cells were significantly decreased (P<0.05
P<0.01); the expression levels of Caspase-3 and Caspase-9 mRNA were significantly decreased(P<0.05
P<0.01);the expression level of Bcl-2 protein was significantly increased(P<0.05
P<0.01)
and the expression levels of Caspase-3 and Caspase-9 protein were significantly decreased (P<0.05
P<0.01).Conclusion: Liquiritin can promote the expression of anti-apoptotic factor Bcl-2 protein
and decrease the expression of the apoptosis-related factors Caspase-3 and Caspase-9 mRNA and protein
thus inhibiting the apoptosis of HaCaT cells induced by UVB.