Abstract:

Xu Gongjun, Cai Suiqing*. *Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China Corresponding author: Cai Suiqing, Email: caisuiqing@163.com 【Abstract】 Objective To measure the expressions of miR-203 and its downstream target genes p63 and survivin in psoriasis vulgaris lesions. Methods Tissue specimens were collected from lesions of 30 patients with psoriasis vulgaris and normal skin of 30 healthy human controls. Real-time PCR was performed to detect miR-203 mRNA expression with U6 as the internal control, as well as p63 and survivin mRNA expressions with glyceraldehyde 3-phosphate dehydrogenase （GAPDH） as the internal control, and Western blot to measure the protein expressions of miR-203 targets p63 and survivin. Statistical analysis was carried out by t test for intergroup comparisons and by Pearson correlation analysis for the analysis of correlation between miR-203, p63 and survivin expressions in psoriasis vulgaris lesions. Results Compared with the normal control skin, psoriasis vulgaris lesions showed significantly decreased mRNA expression level （2-△△Ct） of miR-203 （0.41 ± 0.11, t = 3.16, P < 0.05）, but increased mRNA expression levels of p63 （4.79 ± 0.63, t = 4.72, P < 0.05） and survivin （3.43 ± 0.46, t = 4.35, P < 0.05）. The protein expression levels of p63 and survivin in these lesions were （2.40 ± 0.23） times （t = 3.87, P < 0.05） and （3.49 ± 0.14） times （t = 4.36, P < 0.05） those in the normal control skin respectively. In psoriasis vulgaris lesions, the mRNA expression level of miR-203 showed a significantly negative correlation with that of survivin （r = - 0.36, P < 0.05） and p63 （r = - 0.43, P < 0.05）. Conclusion miR-203 and its downstream target genes p63 and survivin may participate in the occurrence of psoriasis vulgaris.