Circulating intercellular adhesion molecule-1 (ICAM-1) antigen in sera of patients with idiopathic pulmonary fibrosis.
Intercellular adhesion molecule-1 (ICAM-1), a member of immunoglobulin supergene family with a five-domain structure, is known to play an important role in inflammatory diseases. An ELISA was developed using two MoAbs against human ICAM-1 in order to detect the soluble shedding ICAM-1 antigen in sera. We measured levels of circulating ICAM-1 antigen in sera of patients with idiopathic pulmonary fibrosis (IPF), pulmonary sarcoidosis, hypersensitive pneumonitis, bacterial and mycoplasmal pneumonia, and inflammatory diseases of other organs. The results clearly demonstrated that IPF had significantly high levels of circulating ICAM-1 in sera as compared with other disorders or normal controls. Moreover, immunohistochemical analysis with MoAb against human ICAM-1 disclosed that in IPF, the expression of ICAM-1 was intensively enhanced on alveolar epithelial cells. These results suggest that ICAM-1 may contribute to the pathogenesis of IPF.
Department of Internal Medicine, Sapporo Medical College, Japan.
N
N
Shijubo
K
K
Imai
S
S
Aoki
M
M
Hirasawa
H
H
Sugawara
H
H
Koba
M
M
Tsujisaki
T
T
Sugiyama
Y
Y
Hinoda
A
A
Yachi
D000328:Adult; D000368:Aged; D000542:Alveolitis, Extrinsic Allergic / Q000097:blood; D015815:Cell Adhesion Molecules / Q000096:biosynthesis*; D002764:Cholecystitis / Q000097:blood; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D007150:Immunohistochemistry; D018799:Intercellular Adhesion Molecule-1; D008137:Longitudinal Studies; D008171:Lung Diseases / Q000378:metabolism; D008875:Middle Aged; D010195:Pancreatitis / Q000097:blood; D011014:Pneumonia / Q000097:blood; D011658:Pulmonary Fibrosis / Q000378:metabolism*; D012507:Sarcoidosis / Q000097:blood
D015815:Cell Adhesion Molecules; D018799:Intercellular Adhesion Molecule-1