Matrix metalloproteinase gelatinases in sulfur mustard-induced acute airway injury in guinea pigs

被引:31
|
作者
Calvet, JH
Planus, E
Rouet, P
Pezet, S
Levame, M
Lafuma, C
Harf, A
D'Ortho, MP
机构
[1] Ctr Etud Bouchet, Ctr Rech Med Def, F-91710 Vert Le Petit, France
[2] Hop Henri Mondor, Unite 492, F-94010 Creteil, France
[3] Hop Henri Mondor, Serv Physiol, F-94010 Creteil, France
[4] Fac Med, INSERM, U400, F-94010 Creteil, France
关键词
vesicant agents; proteases; bronchoalveolar lavage; macrophages;
D O I
10.1152/ajplung.1999.276.5.L754
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Respiratory tract lesions induced by sulfur mustard (SM), a chemical warfare agent, are characterized by epithelial damage associated with inflammatory cell infiltration. To test the potential role of matrix metalloproteinase gelatinases in these lesions, we evaluated gelatinase activity, albumin content, and total cell count in bronchoalveolar lavage fluid of guinea pigs 24 h after an intratracheal injection of 0.2 mg/kg of SM. The bronchial lavage and alveolar lavage fluids were analyzed separately. The increase in inflammatory cell content of the bronchial lavage fluid, mainly macrophages, observed in SM-intoxicated guinea pigs was accompanied by an increase in albumin and in 92-kDa gelatinase activity. There was a significant correlation between albumin content and 92-kDa gelatinase activity (r = 0.67) and between 92-kDa gelatinase and the number of macrophages. Immunohistochemistry performed on tracheal sections showed the presence of 92-kDa gelatinase at the site of intraepithelial cleavages. Zymography analysis of culture medium conditioned by guinea pig tracheal epithelial cells demonstrated that these cells produced in vitro 92-kDa gelatinase on stimulation. Culture of human bronchial epithelial cells obtained by the explant technique showed a marked increase in 92-kDa gelatinase after exposure to 5 x 10(-5) M SM that reinforced the relevance of our animal results to human exposure to SM. These results suggest that in SM respiratory intoxication, 92-kDa gelatinase of both inflammatory and epithelial cell origins could be involved in epithelial cell detachment.
引用
收藏
页码:L754 / L762
页数:9
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