Lecithinized superoxide dismutase attenuates phorbol myristate acetate-induced injury in isolated dog lung.


Journal Article

Lecithinized superoxide dismutase, a lecithin derivative bound to recombinant human CuZn superoxide dismutase, has a higher affinity for cells such as polymorphonuclear leukocytes and endothelial cells than recombinant human CuZn superoxide dismutase has. We determined the protective effects of lecithinized superoxide dismutase on the increased microvascular permeability induced by phorbol myristate acetate (PMA) in isolated dog lungs. Microvascular permeability was assessed by the capillary filtration coefficient (Kf,c) and solvent drag reflection coefficient (sigma(f)). PMA (13.3 microg) increased microvascular permeability, as evidenced by an increase in Kf,c and the small sigma(f) value. Lecithinized superoxide dismutase at both low (4800 U) and high doses (48,000 U) inhibited the PMA-induced increase in Kf,c, but only the high dose of lecithinized superoxide dismutase attenuated the decrease in sigma(f). Recombinant human CuZn superoxide dismutase did not affect the PMA-induced increase in vascular permeability at either a low (4800 U) or a high dose (48,000 U). These findings suggest that lecithinized superoxide dismutase has a protective effect against oxygen radical-induced lung injury in isolated dog lungs.

Full Text

Cited Authors

  • Miyahara, T; Shibamoto, T; Wang, HG; Koizumi, T; Honda, T; Kubo, K; Sekiguchi, M; Koyama, S

Published Date

  • March 1, 1998

Published In

Volume / Issue

  • 344 / 2-3

Start / End Page

  • 231 - 239

PubMed ID

  • 9600659

Pubmed Central ID

  • 9600659

Electronic International Standard Serial Number (EISSN)

  • 1879-0712

International Standard Serial Number (ISSN)

  • 1879-0712

Digital Object Identifier (DOI)

  • 10.1016/s0014-2999(97)01609-9


  • eng