Agarose-gel electrophoresis for the quality assurance and purity of heparin formulations
Research article published in Journal of pharmaceutical and biomedical analysis (2012)
Abstract
The adulteration of raw heparin (Hep) with a synthetic oversulfated chondroitin sulfate (OSCS) not found in nature produced in 2007-2008 a global crisis giving rise to the development of additional, new and specific methods for its quality assurance and purity. In this study, a simple and sensitive agarose-gel electrophoresis method has been developed for the visualization of OSCS in Hep samples along with other natural glycosaminoglycans possibly present as "process-related impurities", in particular dermatan sulfate (DS) and chondroitin sulfate (CS). Agarose-gel electrophoresis under non-conventional conditions is able to separate OSCS from Hep with its two components, the slow-moving and fast-moving species, DS and CS by performing separation for 15 h (overnight) and under high voltage (100 mA, ∼200 V). Densitometric scanning enabled us to calculate a limit of detection of ∼0.5 μg OSCS with a linear behaviour from 0.1 to 5 μg, comparable to CS/DS. Contaminated samples from Hep manufacturers were analyzed and quantitative data were found comparable to previous studies. Due to its capacity to process many samples in a single run and to the equipment commonly available in laboratories, this analytical method would be suitable for the identification and quantification of contamination by other polysaccharides, in particular OSCS and DS, within Hep preparations and formulations.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Summary
The adulteration of raw heparin (Hep) with a synthetic oversulfated chondroitin sulfate (OSCS) not found in nature produced in 2007-2008 a global crisis giving rise to the development of additional, new and specific methods for its quality assurance and purity.
Why This Matters for Hirudotherapy
This study developed an agarose-gel electrophoresis method to detect oversulfated chondroitin sulfate (OSCS) and other natural glycosaminoglycans such as dermatan sulfate and chondroitin sulfate as impurities within heparin formulations following the 2007-2008 heparin crisis. The technique provides a sensitive, accessible way to identify and quantify polysaccharide contamination in heparin preparations and formulations. The abstract does not mention leeches, hirudotherapy, hirudin, or any leech-derived products, and makes no comparison between heparin and leech-based anticoagulants. Consequently, there is no direct relevance to the ASH domain; the work is strictly focused on pharmaceutical quality control of heparin.
Citation
Agarose-gel electrophoresis for the quality assurance and purity of heparin formulations
Volpi N et al. · Journal of pharmaceutical and biomedical analysis, 2012
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