Immune aging biomarker and detection system and kit thereof

The invention discloses an immune aging biomarker as well as a detection system and a kit thereof. The biomarker is any one of a cell for expressing CD31 + CD45RA + CD4 +, a cell for expressing CD25highCD127lowCD4 +, a cell for expressing CD4 + CD28 +/CD4, and a cell for expressing CD8 + CD28 +/CD8 +. The invention also discloses a detection system for detecting the biomarker. The detection system comprises a detection module and an analysis module, the detection module is used for detecting the content of a biomarker in a sample; the analysis module is used for receiving and analyzing the data obtained by the detection module; the method for detecting the sample by the detection module comprises flow cytometry. The invention also discloses an immune related disease or immune aging detection kit, the kit comprises a detection reagent, and the detection reagent comprises a reagent for detecting the biomarker. The biomarker and the detection system or the detection kit provided by the invention can be used for