RESUMO
The incidence of psoriasis which is characterized by dryness， scaling and itching of the skin has been on the rise. It can have a profound psychological impact on patients' quality of life. Accumulating research has been conducted on the mechanisms of psoriasis in western medicine， from the difference of pathological manifestations of terminal keratinocytes， the disorder of expression of related factors and cells， to the immune imbalance of T lymphocytes and their subsets， or the abnormal transcription dominated by genetic genes. As a result， a complex and huge mechanism network has formed and many hypotheses have emerged. In recent years， with the in-depth research on non-coding genes， it has been clarified that microRNA-modified multi-pathway effect interferes with the occurrence and development of psoriasis and affects the proliferation， apoptosis， and differentiation of keratinocytes. The research on microRNA involves both genetics and immunology， which can help improve the key links in the micro pathway of psoriasis. Thus， it is a key part in the pathogenesis of psoriasis and has also become the hotspot and difficulty of modern research on psoriasis. At the same time， we should give full play to the advantages of traditional Chinese medicine （TCM） in syndrome differentiation and treatment. To be specific， microRNA targets of compound Chinese medicine preparations with the functions of clearing heat， cooling blood， detoxifying and removing blood stasis or effective medicinal monomers such as paeonol， tripterygium glycosides， shikonin， curcumin， total glucosides of paeony and indirubin should be explored， and microRNA can be used as the basis for blood syndrome differentiation of psoriasis. Thereby， the syndrome differentiation theory of TCM and micro indicators of western medicine are integrated， to make full use of characteristics of TCM and guide the clinical syndrome differentiation and treatment. At present， the intervention on microRNA in TCM is rarely studied， and available studies mainly focus on several targets such as microRNA-155， microRNA-210， microRNA-21， microRNA-203， microRNA-320， microRNA-124， microRNA-330， microRNA-146a， and microRNA-15a-5p. This paper summarizes the research on compound Chinese medicine prescriptions and monomers in the treatment and syndrome differentiation of psoriasis through the intervention of microRNA， which is expected to provide a reference for the research on psoriasis in TCM and western medicine and the establishment of microRNA-based database.
RESUMO
Follicular helper T （Tfh） cells are a newly discovered subset of CD4+ T cells. As reported， abnormalities in their development， differentiation， and function are closely related to the occurrence of autoimmune diseases. Psoriasis is an autoimmune skin disease and it is intractable with a prolonged course. At present， it is generally believed that immune imbalance mediated by T cells is the core mechanism of the pathogenesis of psoriasis. In the context of this mechanism， Tfh cells are associated with psoriasis， and their cellular level and abnormal expression of related candidates can promote the occurrence of psoriasis. In terms of treatment， Chinese medicine， by virtue of the characteristics of wide application and low price， serves as a good complementary and alternative treatment option for psoriasis. As confirmed by previous findings， some active ingredients or preparations of Chinese medicine used in the treatment of psoriasis can also intervene in and regulate the immune response mediated by Tfh cells and the related candidates. Based on the research reports and experimental data， the present study reviewed the research progress from the differentiation of Tfh cells， the relationship between Tfh cells and psoriasis， and the intervention and regulation of Tfh cells and related molecules by Chinese medicine， which is expected to provide certain theoretical support and references for the determination of new strategies for psoriasis treatment and research in related fields.