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Am J Physiol Lung Cell Mol Physiol 279: L985-L993, 2000;
1040-0605/00 $5.00
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Vol. 279, Issue 5, L985-L993, November 2000

Adoptive transfer of acute lung injury

Michael A. Moxley, Tracey L. Baird, and John A. Corbett

Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, Missouri 63104

In this study, we describe a novel adoptive transfer protocol to study acute lung injury in the rat. We show that bronchoalveolar lavage (BAL) cells isolated from rats 5 h after intratracheal administration of lipopolysaccharide (LPS) induce a lung injury when transferred to normal control recipient rats. This lung injury is characterized by increased alveolar-arterial oxygen difference and extravasation of Evans blue dye (EBD) into lungs of recipient rats. Recipient rats receiving similar numbers of donor cells isolated from healthy rats do not show adverse changes in the alveolar-arterial oxygen difference or in extravasation of EBD. The adoptive transfer-induced lung injury is associated with increased numbers of neutrophils in the BAL, the levels of which are similar to the numbers observed in BAL cells isolated from rats treated for 5 h with LPS. As an indicator of BAL cell activation, donor BAL cell inducible nitric oxide synthase (iNOS) expression was compared with BAL cell iNOS expression 48 h after adoptive transfer. BAL cells isolated 5 h after LPS administration expressed iNOS immediately after isolation. In contrast, BAL cells isolated 48 h after adoptive transfer did not express iNOS immediately after isolation but expressed iNOS following a 24-h ex vivo culture. These findings indicate that the activation state of donor BAL cells differs from BAL cells isolated 48 h after adoptive transfer, suggesting that donor BAL cells may stimulate migration of new inflammatory cells into the recipient rats lungs.

acute respiratory distress syndrome; nitric oxide; inducible nitric oxide synthase; induced lung injury; rat


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