CD4 and obesity disorder: Moreover, our analysis suggested that many previously uncharacterized intestinal immune cells, including CD4+ IEL-T cells, ILC1s, ILC2s, and CD4+ LPL-T cells, expressed high levels of the downstream genes of these key inflammatory pathways associated with obesity, which may contribute to their proliferation and infiltration, in accordance with changes in cell proportion and ligand–receptor interaction analysis (Fig. 7 C and Fig. 9 A).