Title : Oxidation of alpha 1-protease inhibitor: role of lipid peroxidation products.

Pub. Date : 1989 May

PMID : 2787317






5 Functional Relationships(s)
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1 Previously we demonstrated that in vivo exposure of humans to NO2 resulted in significant inactivation of alpha 1-protease inhibitor (alpha 1-PI) in the bronchoalveolar lavage fluid. Nitrogen Dioxide serpin family A member 1 Homo sapiens
2 Previously we demonstrated that in vivo exposure of humans to NO2 resulted in significant inactivation of alpha 1-protease inhibitor (alpha 1-PI) in the bronchoalveolar lavage fluid. Nitrogen Dioxide serpin family A member 1 Homo sapiens
3 However, alpha 1-PI retains its elastase inhibitory activity in vitro when exposed to 10 times the concentration of NO2 used in vivo. Nitrogen Dioxide serpin family A member 1 Homo sapiens
4 alpha 1-PI in solutions containing phosphate buffer (control), 0.1 mM stearic acid (saturated fatty acid, 18:0), or 0.1 mM linoleic acid (polyunsaturated fatty acid, 18:2) was exposed to either N2 or NO2 (50 ppm for 4 h). Nitrogen Dioxide serpin family A member 1 Homo sapiens
5 Elastase inhibitory capacity of alpha 1-PI was significantly diminished in the presence of 0.1 mM linoleic acid and under NO2 atmosphere (75 +/- 8% of control, P less than 0.01), whereas there was no change in elastase inhibitory capacity of alpha 1-PI in the presence or absence (buffer only) of 0.1 mM stearic acid under a similar condition (109 +/- 11 and 94 +/- 6%, respectively). Nitrogen Dioxide serpin family A member 1 Homo sapiens