PMID: 22332371Feb 16, 2012Paper

Role of the medium acidity in the complexes formation of pyropheophorbide a with albumin and lipoproteins

Bioorganicheskaia khimiia
G V GolovinaV A Kuz'min

Abstract

The spectral characteristics of the photosensitizer pyropheophorbide a (PPP) complexes with its carriers, that is, serum albumin and low density lipoproteins, were investigated in aqueous solutions at pH 7.4 and 5.0. The acidic pH had no effect on the quantitative parameters of PPP binding to lipoproteins but reduces its affinity for albumin. Differential role of acidification in the binding of PPP to biomacromolecules should be considered in the design of PPP-based drugs given that pH is frequently lowered in the sites of the disease.

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