Total flavonoid from Glycyrrhizae Radix et Rhizoma and its ingredient isoliquiritigenin regulation M2 phenotype polarization of macrophages / 中国中药杂志

To study the mechanisms of total flavonoid from Glycyrrhizae Radix et Rhizoma (TFGR) and its ingredient isoliquiritigenin (ISL) on their regulation of M2 phenotype polarization of macrophages. IL-4 (60 μg x L(-1)) induced RAW264.7 cells for 6 h to establish the M2 macrophage model. TFGR and ISL restrained breast cancer cells migration with the aid of M2 macrophages in vitro. TFGR and ISL inhibited gene and protein expression of Arg-1, up-regulated gene of HO-1 and protein expression of iNOS, enhanced the expression of microRNA 155 and its target gene SHIP1, meanwhile down-regulated.the phosphorylation of STAT3 and STAT6. So TFGR and ISL were the bioactive fraction and ingredient in Glycyrrhizae Radix et Rhizoma to reverse M2 phenotype macrophages polarization. TFGR and ISL inhibited the promotion of M2 macrophages to breast cancer cells migration in vitro, STAT signal pathways and miR155 were partly involved.

Advance in studies on regulatory mechanism of phenotype polarization of macrophages and intervention with traditional Chinese medicines / 中国中药杂志

Macrophages are heterogeneous and diversified, and can be polarized into different phenotypes in various microenvironments and physiological or pathological conditions. Major macrophage subpopulations including classically activated(M1) and alternatively activated(M2) macrophages, which represent different surface receptors, secret different cytokines and chemokines, are regulated by different signal paths of transcriptions and epigenetic levels, and play distinctive roles in tumor progress. TCMs may improve the microenvironment by regulating phenotype polarization of macrophages. So far, specific biomarkers and polarized molecules mechanisms generated through the macrophage polarization approach are still unclear. In this article, we merely summarize the advance in domestic and foreign studies on phenotype polarization of macrophages and regulatory mechanisms and look into the future of intervention with TCMs.