Table 4—

Expression of the co-stimulatory molecule CD28 in CD4+ and CD8+ T-lymphocytes in blood and bronchoalveolar lavage fluid (BALF)

Never-smokersSmokers with normal lung functionCOPD patientsp-value
CD4+CD28+ %
CD8+CD28+ %
  • Data are presented as mean±sem, unless otherwise stated. Percentages of CD4+CD28+ or CD8+CD28+ refer to the total amount of CD4 or CD8 T-cells respectively. COPD: chronic obstructive pulmonary disease; ns: nonsignificant. #: for never-smokers versus smokers, with or without COPD.