[Research progress in N6-methyladenosine modification in the field of stomatology].

N6-methyladenosine (m6A) is the most abundant and widely distributed internal RNA modification in eukaryotic cells, and it is involved in the regulation of gene expression and biological processes in many cells. In recent years, studies on the role of m6A modification in oral cavity have emerged gradually. Existing researches show that m6A-related proteins are involved in the regulation of oral squamous cell carcinoma and its resistance to therapy. Methyltransferase-like 3 regulates apoptosis and autophagy of chondrocytes in inflammation, the angiogenesis and osteogenesis during distraction osteogenesis of endothelial progenitor cells, inflammatory response of dental pulp cells, the differentiation and osteogenesis of dental pulp stem cells, the development of tooth roots and the differentiation of bone marrow mesenchymal stem cells and so on. Moreover, m6A modification may also be related to the occurrence and development of periodontitis, oral ulcers and oral submucosal fibrosis. These studies have provided new ideas for the pathogenesis of various oral diseases and the diagnosis and treatment of oral bone tissue repair and regeneration. This paper reviews the recent research progress on the role of m6A modification in the field of stomatology and summarize the current research status of m6A in the field of stomatology, in order to provide reference for the further research of m6A function and mechanism in the field of stomatology.

[Effect of trace elements on the differentiation of dental pulp stem cells].

Dental pulp stem cell (DPSC), with a high capacity of multidirectional differentiation, is the key and preferred cell in the study of dental pulp and dentin regeneration. The effect of trace elements on the differentiation of DPSC is one of the research hotspots in the field of oral tissue engineering in recent years. Trace elements have a wide range of physiological and biochemical functions. It can directly regulate the differentiation, migration and proliferation capacity of DPSC, while can indirectly affect the differentiation of DPSC by exerting antibacterial and immune function regulation or changing the physical and chemical properties of the scaffold material. To clarify the role of trace elements in the differentiation of DPSC can provide more reference for the realization of pulp and dentin regeneration. This paper will review the recent research progress on the effects of relevant trace elements on the differentiation of DPSC into odontogenesis and angiogenesis.

[Research progress of topical treatment of oral chronic graft versus host disease: a review].

Oral cavity is one of the main organs involved in chronic graft versus host disease (cGVHD). Oral cGVHD seriously affects the patient's quality of life. Topical use of glucocorticoid and other agents is the primary topical treatment of oral cGVHD, oral photochemical therapy and various new methods have also been applied in patients recently. These important adjuvant therapies are based on the systemic use of drugs such as immunosuppressive agents, and sometimes, may be the only effective treatment for oral cGVHD. This review will focus on the application of topical agent treatment and oral photochemotherapy in oral cGVHD patients.