Abstract
To investigate the effect of Lang-chuang-ding Decoction (, LCD) on the expression of DNA methylation of CD70 gene promoter in peripheral blood mononuclear cells (PBMCs) of females with systemic lupus erythematosus (SLE). PBMCs isolated from female patients with SLE or healthy donors were cultured and treated with LCD medicated serum or normal serum for 24 or 48 h. The mRNA expressions of CD70 gene in PBMCs were detected by reverse transcription polymerase chain reaction (PCR); the DNA methylation of the CD70 gene promoter region was detected by methylation-specific PCR. After treated with medicated serum for 48 h, the mRNA expression levels of CD70 in PBMCs of SLE patients were signifificantly higher than those of healthy donors (P<0.05); the DNA methylation levels of CD70 promoter region in PBMCs of SLE patients treated with medicated serum for 48 h were signifificantly higher than those treated with fetal bovine serum (P<0.01). LCD could inhibit CD70 gene expression in PBMCs of SLE patients by promoting the DNA methylation of CD70 gene promoter.
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