Interleukin-5 ( IL-5 ) , which is produced by CD4 ( + ) T helper 2 ( Th2 ) cells , but not by Th1 cells , plays a key role in the development of eosinophilia in asthma .
interleukin-5 ( il-5 ) , which is produced by cd4 ( + ) t helper 2 ( th2 ) cells , but not by th1 cells , plays a key role in the development of eosinophilia in asthma .
B-protein_molecule O B-protein_molecule O O O O O O B-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type O O O O B-cell_type I-cell_type O O O O O O O O O B-other_name O B-other_name O