RAG1 and type 2 diabetes mellitus: The host models included obese C57BL/6 mice fed with high-fat diet (HFD) 65,73, hyperglycemia non-obese diabetic/severe combined immunodeficiency (NOD/SCID) mice injected with streptozotocin (STZ) 64, and T2DM Rag1 -/- mice injected with STZ after 3-month HFD 36.