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  • Title: Carbon monoxide inhibition of apoptosis during ischemia-reperfusion lung injury is dependent on the p38 mitogen-activated protein kinase pathway and involves caspase 3.
    Author: Zhang X, Shan P, Otterbein LE, Alam J, Flavell RA, Davis RJ, Choi AM, Lee PJ.
    Journal: J Biol Chem; 2003 Jan 10; 278(2):1248-58. PubMed ID: 12399465.
    Abstract:
    Carbon monoxide (CO), a reaction product of the cytoprotective gene heme oxygenase, has been shown to be protective against organ injury in a variety of models. One potential mechanism whereby CO affords cytoprotection is through its anti-apoptotic properties. Our studies show that low level, exogenous CO attenuates anoxia-reoxygenation (A-R)-induced lung endothelial cell apoptosis. Exposure of primary rat pulmonary artery endothelial cells to minimal levels of CO inhibits apoptosis and enhances phospho-p38 mitogen-activated protein kinase (MAPK) activation in A-R. Transfection of p38alpha dominant negative mutant or inhibition of p38 MAPK activity with SB203580 ablates the anti-apoptotic effects of CO in A-R. CO, through p38 MAPK, indirectly modulates caspase 3. Furthermore, we correlate our in vitro apoptosis model with an in vivo model of A-R by showing that CO can attenuate I-R injury of the lung. Taken together, our data are the first to demonstrate in models of A-R that the anti-apoptotic effects of CO are via modulation of p38 MAPK and caspase 3.
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