Covalent coupling of doxorubicin in protein microspheres is a major determinant of tumour drug disposition.


Doxorubicin is shown to be present in albumin microspheres (10-40 microns) in two forms: the native drug and a fraction of drug covalently coupled to the protein matrix probably via glutaraldehyde. Upon trypsin digestion the fraction covalently coupled is released and can be resolved from native doxorubicin by high performance liquid chromatography and… (More)


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