... isinhibited by cytokines such as interleukin (IL)-3, IL-5 andgranulocyte-macrophage colony-stimulating factor (GM-CSF) in vitro and in vivo.[1] In addition, we and othershave previously shown ... cells.Primary human eosinophils are terminally differentiated,non-dividing cells that can only be cultured for very shortperiods, making these cells unsuitable for many studiesusing molecular biology. ... Lung Institute, Imperial College, London, UK, 3The Center for Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China and 4Department of Pulmonary Medicine...