title: [A study of clinical significance of leukocyte migration inhibition test in drug-induced hypersensitivity pneumonitis].
abstract: In 71 patients suspected of drug-induced pneumonitis, the identification of the allergenic drugs were studied by leukocyte migration inhibition test (LMIT). The LMIT was positive in 61 cases (85.9%). Leukocyte migration activating factor (LMAF) was detected in 22 cases (30.9%), and leukocyte migration inhibitory factor (LMIF) in 39 cases (54.9%), which was found significantly higher than LMAF (p < 0.05). There was no considerable difference in the LMIT-positive rate between interstial and eosinophilic pneumonia. The LMIT-positive drugs were detected in 66 of all 180 suspected drugs, in which 33 drugs (50%) were antibacterial agents and 11 were Kampo prescriptions. beta-Lactam antibiotics accounted for about half the number (16 drugs) in antibacterial agents. LMAF was detected more frequently in beta-lactam antibiotics-induced pneumonitis, which LMIF was detected more often in Kampo prescriptions-induced pneumonitis (p < 0.005). Furthermore, the latent period from drug initial to the onset of pneumonitis were about 10 days in beta-lactam antibiotics-induced pneumonitis and a few months in Kampo prescriptions-induced pneumonitis (p < 0.001). Our findings indicate that LMIT is valuable to identify the allergenic drugs in drug-induced hypersensitivity pneumonitis and that delayed-type hypersensitivity (DTH), with which LMIF is related closely, plays a major role in the pathogenesis of this lung lesion. Furthermore, the pathogenic mechanism of beta-lactam antibiotics-induced pneumonitis may be different from that of Kampo prescriptions-induced pneumonitis.
authors.affiliation: Pharmacy, Suibarago Hospital.
authors.forename: K
authors.initials: K
authors.lastname: Uno
authors.forename: A
authors.initials: A
authors.lastname: Kondo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000542:Alveolitis, Extrinsic Allergic / Q000139:chemically induced* / Q000175:diagnosis; D000900:Anti-Bacterial Agents / Q000276:immunology; D000890:Anti-Infective Agents / Q000276:immunology; D002464:Cell Migration Inhibition; D002648:Child; D004365:Drugs, Chinese Herbal / Q000009:adverse effects; D005260:Female; D006801:Humans; D006968:Hypersensitivity, Delayed; D007769:Lactams; D008297:Male; D008875:Middle Aged; D011657:Pulmonary Eosinophilia / Q000175:diagnosis*
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D004365:Drugs, Chinese Herbal; D007769:Lactams