Abstract: Noncoding RNA,including miRNA,siRNAand piRNA as the representative of the short RNA and long chain non coding RNA.long non-coding RNAs (lncRNAs) are hot spots which are different from other smaller non-coding RNAs. Through researches, lncRNAs have been found to affect species evolution, embryonic development, metabolism and tumorigenesis. MicroRNAs (miRNAs) are a class of small noncoding RNAs that control gene expression by targeting mRNAs and triggering either translation repression or RNA degradation.

Key words: long non-coding RNAs, small non-coding RNA, virus, trend study