Ascorbate induced cross-linking of oxyhemoglobin subunits

Ascorbate induced cross-linking of oxyhemoglobin subunits

Ascorbic acid during oxidation in vitro can generate H2O2 which induces non-disulphide covalent cross-linking of coincubated oxyhemoglobin. The cross-linking phenomenon mediated by H2O2 takes place possibly without the involvement of hydroxyl radicals as evident from the failure of radical scavenger...

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Veröffentlicht in:Indian journal of experimental biology 2000-03, Vol.38 (3), p.280-282
Hauptverfasser: Sur, A, Pal, K, Sen, S, Chakrabarti, S
Format: Artikel
Sprache:eng
Schlagworte:
Ascorbic Acid - pharmacology
Catalase - pharmacology
Cross-Linking Reagents
Humans
Hydrogen Peroxide - metabolism
In Vitro Techniques
Oxidation-Reduction
Oxyhemoglobins - chemistry
Oxyhemoglobins - drug effects
Oxyhemoglobins - metabolism
Superoxide Dismutase - pharmacology
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Zusammenfassung:Ascorbic acid during oxidation in vitro can generate H2O2 which induces non-disulphide covalent cross-linking of coincubated oxyhemoglobin. The cross-linking phenomenon mediated by H2O2 takes place possibly without the involvement of hydroxyl radicals as evident from the failure of radical scavengers like mannitol and dimethyl sulphoxide as well as metal-chelator, to inhibit the process. This pro-oxidant effect of ascorbic acid may have physiological significance in red blood cells in vivo.
ISSN:0019-5189