Upregulation of Th1 cytokine profile in bronchoalveolar lavage fluid of patients with hypersensitivity pneumonitis.
The aim was to find out how the IL-12 and IL-18 levels in the bronchoalveolar lavage fluid (BALF) correspond to the inflammatory activity of the hypersensitivity pneumonitis (HP). We studied 12 patients with HP and 13 normal subjects. IL-12 and IL-18 levels were measured using ELISA kits. We found a significantly higher plasma angiotensin-converting enzyme (ACE) concentration (55 vs. 34 U/L, P=0.0016), lymphocyte percentage (57 vs. 14%, P<0.001), CD8+ cells (32 vs. 17%, P<0.001) and a lower CD4/CD8 ratio (1.2 vs. 2.0, P<0.0001). The IL-12 and IL-18 levels in BALF were significantly higher in HP patients than in healthy subjects (3.9 vs. 3.2 pg/ml, P=0.003 and 14.2 vs. 6.15 pg/ml, P% 0.0001, respectively). We found a strong positive correlation between IL-12 and the percentage of lymphocytes (r=0.68, P=0.015) and a negative one between IL-12 and the percentage of macrophages in BALF (r=-0.64, P=0.024). We conclude that upregulation of the Th1 cell cytokine profile may play a significant role in the pathogenesis of HP.
Mroz
R M
RM
Department of Pneumology, Bialystok Medical University, Bialystok, Poland. robmroz@wp.pl
Korniluk
M
M
Stasiak-Barmuta
A
A
Chyczewska
E
E
D000328:Adult; D000542:Alveolitis, Extrinsic Allergic / Q000378:metabolism* / Q000473:pathology*; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology*; D001999:Bronchoscopy; D016207:Cytokines / Q000096:biosynthesis*; D004562:Electrocardiography; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D018664:Interleukin-12 / Q000378:metabolism; D020382:Interleukin-18 / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D012129:Respiratory Function Tests; D018417:Th1 Cells / Q000378:metabolism*
D016207:Cytokines; D020382:Interleukin-18; D018664:Interleukin-12; D010100:Oxygen