CD4 and metabolic syndrome: In addition, the level of DPP4 expression on CD4+ T cells was positively correlated with plasma levels of cholesterol and triglycerides (Figure 2d–f), suggesting that the expression of DPP4 on T cells may be associated with dyslipidemia, which is a major risk factor for atherosclerosis.[11] In contrast, the frequency of DPP4+ CD4+ T‐cell DPP4 was not associated with fasting blood glucose, fasting insulin, and statin therapy (Figure S3a–c, Supporting Information).