The ILC2 cell proliferation and cytokine expression regulated by HDL. A Proliferation of ILC2 was assessed by using tritiated thymidine incorporation under HDL stimulation. B, C The mRNA levels of GATA3 and RORα by ILC2 determined by PCR. D, E The IL-5 and IL-13 protein expression by ILC2 assessed by ELISA. Three independent tests were performed for every experiment. HDL, high density lipoprotein. *P < 0.05.