Research progress of circular RNA in head and neck squamous cell carcinoma / 中国医师杂志

CircRNA(circular RNA) is a new class of covalently closed circular non-coding RNAs, with the function of the microRNA sponge, regulation of gene expression, and other functions. Studies have confirmed that circRNAs are involved in the occurrence and progression of a variety of tumors, and can be used as biomarkers and therapeutic targets for tumor diagnosis and prognosis evaluation. In this paper, the expression and mechanism of circRNA in head and neck squamous cell carcinoma are reviewed.

Building and identification of prion gene eukaryotic expression vector of human / 重庆医学

Objective To constructan eukaryotic expression recombinant plasmid named pEGFP-N2-PRNP .Methods Total RNA was extracted from alzheimer (AD) disease peripheral blood ,and the PRNP gene was amplified by reverse transcription-poly-merase chain reaction(RT-PCR) .By using gene recombination technique ,human PRNP cDNA was inserted into retroviral vector pEGFP-N2 .The recombinant plasmid was identified by a pair of specified primers containing the restriction sites of Xho Ⅰ and EcoRⅠ .Results The PRNP gene could be obtained by RT-PCR ,the recombinant plasmid was identified by restriction endonucle-ase analysis ,PCR and sequence analysis ,and the expression vector pEGFP-N2-PRNP ,which could be stably expressed in SH-SY5Y cells .Conclusion The recombinant plasmid pEGFP-N2-PRNP is constructed successfully ,Which offers a basic for the further re-search on PRNP biological fuction .