The genotypic identification and elementary phenotypic analysis of MULTl-transgenic mice / 基础医学与临床

ABSTRACT

Objective To identify high affinity ligand MULT1-transgenic mice,analyze its elementary phenotype,and to perform primary functional study in MULT1.Methods We identified the genotype of transgenic mice by PCR and detected transcription level of MULT1 in tails by real-time PCR.The flowcytometry and immunohisto-chemistry were used to analyze the expression of MULT1 in various tissues.Results 25 3'S-strain and 13 4'S-strain MULT1-transgenic mice were obtained and which contain high level of MULT1 transcripts.MULT1 protein is mainly expressed in intestinal intraepithelial lymphocytes (iIELs) and thymocytes but not on splenocytes.Moreover,the levels of MULT1 expression in iIELs and thymocytes are associated with age.Within iIELs,the percentage of CD8~+ Tcells decreased,while CD4~+ CD25~+ Treg cells increased,when compared with wild-type mouse.Conclu-sion We successfully produced MULT1-transgenic mice.MULT1 is possibly associated with thymic development and aging,as well as immunoregulation in mice.