title: T lymphocyte activation in patients with active tuberculosis.
abstract: Soluble interleukin-2 receptor (sIL-2R) is a marker of T lymphocyte activation. We measured the amount of serum sIL-2R in 35 patients with active tuberculosis before the initiation of antituberculous treatment. Twenty had pulmonary parenchymal lesion, 8 had tuberculous pleural effusion, and 7 had tuberculous lymphadenitis. The serum sIL-2R values were markedly elevated in patients with pulmonary tuberculosis (parenchymal lesion and pleural effusion) compared with patients with tuberculous lymphadenitis (2,612 +/- 536 versus 538 +/- 121 U/ml, p = 0.023), old, inactive tuberculosis (335 +/- 23 U/ml, p = 0.001), and normal control subjects (376 +/- 38 U/ml, p = 0.001). No significant difference was found between patients with parenchymal lesion and those with tuberculous pleural effusion. There was a positive correlation between serum sIL-2R values and the extent of disease on chest radiograph (r = 0.58, p less than 0.001). We conclude that the amount of sIL-2R may be a useful marker of disease activity and extent of involvement in patients with active tuberculous lesions.
authors.affiliation: Department of Medicine, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, N.T.
authors.forename: C H
authors.initials: CH
authors.lastname: Chan
authors.forename: K N
authors.initials: KN
authors.lastname: Lai
authors.forename: J C
authors.initials: JC
authors.lastname: Leung
authors.forename: C K
authors.initials: CK
authors.lastname: Lai
mesh_terms: D005260:Female; D006801:Humans; D008213:Lymphocyte Activation / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D015375:Receptors, Interleukin-2 / Q000097:blood*; D013601:T-Lymphocytes / Q000276:immunology*; D014388:Tuberculosis, Lymph Node / Q000276:immunology*; D014397:Tuberculosis, Pulmonary / Q000276:immunology*
chemical_list: D015375:Receptors, Interleukin-2