OBJECTIVE: To observe the effect of shikonin on the proliferation of human keratinocytes induced by IL-17 and secretion of chemokines, in order to discuss the mechanism of Shikonin in the treatment of psoriasis. METHOD: In vitro cultured HaCaT cells were stimulated by IL-17A (200 μg x L(-1)) and mixed with different concentrations (2, 1 mg x L(-1)) of shikonin for 24 hours. The cell proliferation was detected by CCK-8 assay. Cell secretion inflammatory factor interleukin-23 (IL-23) was detected by ELISA. The expressions of intracellular chemokines CXCL1, CXCL2, CCL20 and 6-defensin 4 (DEFB4) were detected by Real-time PCR. RESULT: Shikonin (2,1 mg x L(-1)) could distinctly inhibit HaCaT cell proliferation induced by IL-17A, with statistical difference (P < 0.01). Each shikonin group showed decreases in the secretion of IL-23 and inhibition in expressions of intracellular CXCL1, CXCL2, CCL20 and DEFB4. CONCLUSION: Shikonin could inhibit HaCaT cells proliferation induced by IL-17 and secretion of relevant cytokines and recruit leukocytes by inhibiting chemokines, so as to show the effect in treating psoriasis.
OBJECTIVE: To observe the effect of shikonin on the proliferation of human keratinocytes induced by IL-17 and secretion of chemokines, in order to discuss the mechanism of Shikonin in the treatment of psoriasis. METHOD: In vitro cultured HaCaT cells were stimulated by IL-17A (200 μg x L(-1)) and mixed with different concentrations (2, 1 mg x L(-1)) of shikonin for 24 hours. The cell proliferation was detected by CCK-8 assay. Cell secretion inflammatory factor interleukin-23 (IL-23) was detected by ELISA. The expressions of intracellular chemokines CXCL1, CXCL2, CCL20 and 6-defensin 4 (DEFB4) were detected by Real-time PCR. RESULT: Shikonin (2,1 mg x L(-1)) could distinctly inhibit HaCaT cell proliferation induced by IL-17A, with statistical difference (P < 0.01). Each shikonin group showed decreases in the secretion of IL-23 and inhibition in expressions of intracellular CXCL1, CXCL2, CCL20 and DEFB4. CONCLUSION:Shikonin could inhibit HaCaT cells proliferation induced by IL-17 and secretion of relevant cytokines and recruit leukocytes by inhibiting chemokines, so as to show the effect in treating psoriasis.