微小RNA-205在肿瘤化学治疗耐药中的作用和机制

Role of microRNA-205 on chemoresistance and its mechanism in tumor

肿瘤对化学治疗药物的耐药常导致化学治疗失败，肿瘤耐药是临床治疗的一大难题。肿瘤的化学治疗耐药涉及多基因多信号转导通路的复杂调控过程，其机制迄今不明。微小RNA（miRNA）是由一类长18-25碱基组成的内源性非编码单链小RNA分子，在调节多种细胞生物学过程中起着重要的作用。miRNA的异常表达与肿瘤的发生进展、迁移及化学治疗耐药存在密切的关系，而miRNA-205（miR-205）在肿瘤化学治疗耐药中起重要的调控作用，但其具体机制尚不清楚。本文就miR-205及其在肿瘤化学治疗耐药中的作用和机制等研究进展作一综述。

Resistance to chemotherapeutic drugs is a difficult problem that often leads to the failure of chemotherapy in tumor clinical treatment. Chemoresistance mechanism involves the complex and unclear regulation of multiple genes and signaling pathways. MicroRNA（miRNA） are endogenous, small non-coding, single-strand RNA molecules that are 18-25 nucleotides in length. They play a crucial role in regulating various cellular biological processes. Accumulated studies show that aberrant expression of miRNA is associated with progression, migration, and chemotherapy resistance in various cancers. Recently, an increasing number of studies reveal that miRNA-250（miR-205） participates in regulating chemotherapy resistance in cancers. However, the role of miR-205 in chemoresistance is still unclear. This paper reviews the relationship between miR-205 and chemotherapy resistance in tumors.