Literature DB >> 9405597

Peroxynitrite rapidly permeates phospholipid membranes.

S S Marla1, J Lee, J T Groves.   

Abstract

Peroxynitrite (ONOO-) is a potent oxidant implicated in a number of pathophysiological processes. The activity of ONOO- is related to its accessibility to biological targets before its spontaneous decomposition (t1/2 approximately 1 s at pH 7.4, 37 degrees C). Using model phospholipid vesicular systems and manganese porphyrins as reporter molecules, we demonstrated that ONOO- freely crosses phospholipid membranes. The calculated permeability coefficient for ONOO- is approximately 8.0 x 10(-4) cm.s-1, which compares well with that of water and is approximately 400 times greater than that of superoxide. We suggest that ONOO- is a significant biological effector molecule not only because of its reactivity but also because of its high diffusibility.

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Year:  1997        PMID： 9405597      PMCID： PMC24925          DOI： 10.1073/pnas.94.26.14243

Source DB:  PubMed          Journal:  Proc Natl Acad Sci U S A        ISSN： 0027-8424            Impact factor:   11.205


  40 in total

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