Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/59930
Title: Analysis of pharmaceutical heparins and potential contaminants using<sup>1</sup>H-NMR and PAGE
Authors: Zhenqing Zhang
Boyangzi Li
Jiraporn Suwan
Fuming Zhang
Zhenyu Wang
Haiying Liu
Barbara Mulloy
Robert J. Linhardt
Keywords: Pharmacology, Toxicology and Pharmaceutics
Issue Date: 1-Jan-2009
Abstract: In 2008, heparin (active pharmaceutical ingredient, API) lots were associated with anaphylactoid-type reactions. Oversulfated chondroitin sulfate (OSCS), a semi-synthetic glycosaminoglycan (GAG), was identified as a contaminant and dermatan sulfate (DS) as an impurity. While DS has no known toxicity, OSCS was toxic leading to patient deaths. Heparins, prepared before these adverse reactions, needed to be screened for impurities and contaminants. Heparins were analyzed using high-field1H-NMR spectroscopy. Heparinoids were mixed with a pure heparin and analyzed by1H-NMR to assess the utility of1H-NMR for screening heparin adulterants. Sensitivity of heparinoids to deaminative cleavage, a method widely used to depolymerize heparin, was evaluated with polyacrylamide gel electrophoresis to detect impurities and contaminants, giving limits of detection (LOD) ranging from 0.1% to 5%. Most pharmaceutical heparins prepared between 1941 and 2008 showed no impurities or contaminants. Some contained DS, CS, and sodium acetate impurities. Heparin prepared in 2008 contained OSCS contaminant. Heparin adulterated with heparinoids showed additional peaks in their high-field1H-NMR spectra, clearly supporting NMR for monitoring of heparin API with an LOD of 0.5-10%. Most of these heparinoids were stable to nitrous acid treatment suggesting its utility for evaluating impurities and contaminants in heparin API. © 2009 Wiley-Liss, Inc. and the American Pharmacists Association.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=70349648765&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/59930
ISSN: 15206017
00223549
Appears in Collections:CMUL: Journal Articles

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