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DI Xuemei, YUAN Yaohui, ZHANG Chao, GAO Yue. Research on the effect and mechanism of astragalus Ⅳ(AS-Ⅳ) on the expression of CCL18 in U937 macrophages[J]. Journal of Pharmaceutical Practice and Service, 2019, 37(1): 32-36,41. doi: 10.3969/j.issn.1006-0111.2019.01.008
Citation: DI Xuemei, YUAN Yaohui, ZHANG Chao, GAO Yue. Research on the effect and mechanism of astragalus Ⅳ(AS-Ⅳ) on the expression of CCL18 in U937 macrophages[J]. Journal of Pharmaceutical Practice and Service, 2019, 37(1): 32-36,41. doi: 10.3969/j.issn.1006-0111.2019.01.008

Research on the effect and mechanism of astragalus Ⅳ(AS-Ⅳ) on the expression of CCL18 in U937 macrophages

doi: 10.3969/j.issn.1006-0111.2019.01.008
  • Received Date: 2018-07-06
  • Rev Recd Date: 2018-12-31
  • Objective To investigate the effect and mechanism of astragalus Ⅳ(AS-Ⅳ) on the expression of CCL18 in U937 macrophages. Methods The expression of CCL18 mRNA was detected by real time PCR. The expression of CCL18 protein was assessed by Elisa. The expression of IL-4 receptor was measured by flow cytometry. The STAT6 phosphorylation was measured by Elisa. The activity of JAK kinase was detected by Z″-LYTETM kinase assay. Results AS-Ⅳ significantly down-regulated the expression of CCL18 in U937 macrophages stimulated by IL-4 with a dose-dependent manner. However, AS-Ⅳ had no significant effect on IL-4 receptor subunit expression. The STAT6 phosphorylation was inhibited by AS-Ⅳ, but the effect was less than AS1517499; the activity of JAK1, JAK3 and TYK2 kinase were inhibited by AS-Ⅳ. Conclusion AS-Ⅳ could inhibit the expression of CCL18 in U937 macrophages stimulated by IL-4. One of the suggested mechanisms was due to inhibition of JAK kinase activity, which caused STAT6 transcriptional activity down and inhibited CCL18 gene expression.
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Research on the effect and mechanism of astragalus Ⅳ(AS-Ⅳ) on the expression of CCL18 in U937 macrophages

doi: 10.3969/j.issn.1006-0111.2019.01.008

Abstract: Objective To investigate the effect and mechanism of astragalus Ⅳ(AS-Ⅳ) on the expression of CCL18 in U937 macrophages. Methods The expression of CCL18 mRNA was detected by real time PCR. The expression of CCL18 protein was assessed by Elisa. The expression of IL-4 receptor was measured by flow cytometry. The STAT6 phosphorylation was measured by Elisa. The activity of JAK kinase was detected by Z″-LYTETM kinase assay. Results AS-Ⅳ significantly down-regulated the expression of CCL18 in U937 macrophages stimulated by IL-4 with a dose-dependent manner. However, AS-Ⅳ had no significant effect on IL-4 receptor subunit expression. The STAT6 phosphorylation was inhibited by AS-Ⅳ, but the effect was less than AS1517499; the activity of JAK1, JAK3 and TYK2 kinase were inhibited by AS-Ⅳ. Conclusion AS-Ⅳ could inhibit the expression of CCL18 in U937 macrophages stimulated by IL-4. One of the suggested mechanisms was due to inhibition of JAK kinase activity, which caused STAT6 transcriptional activity down and inhibited CCL18 gene expression.

DI Xuemei, YUAN Yaohui, ZHANG Chao, GAO Yue. Research on the effect and mechanism of astragalus Ⅳ(AS-Ⅳ) on the expression of CCL18 in U937 macrophages[J]. Journal of Pharmaceutical Practice and Service, 2019, 37(1): 32-36,41. doi: 10.3969/j.issn.1006-0111.2019.01.008
Citation: DI Xuemei, YUAN Yaohui, ZHANG Chao, GAO Yue. Research on the effect and mechanism of astragalus Ⅳ(AS-Ⅳ) on the expression of CCL18 in U937 macrophages[J]. Journal of Pharmaceutical Practice and Service, 2019, 37(1): 32-36,41. doi: 10.3969/j.issn.1006-0111.2019.01.008
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