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    Photochemical preparation of a novel low molecular weight heparin

    Author
    Higashi, Kyohei; Hosoyama, Saori; Ohno, Asami; Masuko, Sayaka; Yang, Bo; Sterner, Eric; Wang, Zhenyu; Linhardt, Robert J.; Toida, Toshihiko
    ORCID
    https://orcid.org/0000-0003-2219-5833
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    PHOTOCHEMICAL PREPARATION OF A NOVEL LOW MOLECULAR WEIGHT.pdf (431.1Kb)
    Other Contributors
    Date Issued
    2012-01-15
    Subject
    Biology; Chemistry and chemical biology; Chemical and biological engineering; Biomedical engineering
    Degree
    Terms of Use
    In Copyright : this Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). https://rightsstatements.org/page/InC/1.0/;
    Full Citation
    Photochemical preparation of a novel low molecular weight heparin, K. Higashi, S. Hosoyama, A. Ohno, S. Masuko, B. Yang, E. Sterner, Z. Wang, R. J. Linhardt, T. Toida, Carbohydrate Polymers, 87, 1737-1743, 2012.
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    URI
    https://hdl.handle.net/20.500.13015/5273; https://doi.org/10.1016/j.carbpol.2011.09.087
    Abstract
    Commercial low molecular weight heparins (LMWHs) are prepared by several methods including peroxidative cleavage, nitrous acid cleavage, chemical ß-elimination, and enzymatic β-elimination. The disadvantages of these methods are that strong reaction conditions or harsh chemicals are used and these can result in decomposition or modification of saccharide units within the polysaccharide backbone. These side-reactions reduce product quality and yield. Here we show the partial photolysis of unfractionated heparin can be performed in distillated water using titanium dioxide (TiO2). TiO2 is a catalyst that can be easily removed by centrifugation or filtration after the photochemical reaction takes place, resulting in highly pure products. The anticoagulant activity of photodegraded LMWH (pLMWH) is comparable to the most common commercially available LMWHs (i.e., Enoxaparin and Dalteparin). 1H NMR spectra obtained show that pLMWH maintains the same core structure as unfractionated heparin. This photochemical reaction was investigated using liquid chromatography/mass spectrometry (LC/MS) and unlike other processes commonly used to prepare LMWHs, photochemically preparation affords polysaccharide chains of reduced length having both odd and even of saccharide residues.;
    Description
    Carbohydrate Polymers, 87, 1737-1743; Note : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
    Department
    The Linhardt Research Labs.; The Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies (CBIS);
    Publisher
    Elsevier
    Relationships
    The Linhardt Research Labs Online Collection; Rensselaer Polytechnic Institute, Troy, NY; Carbohydrate Polymers; https://harc.rpi.edu/;
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    A full text version is available in DSpace@RPI;
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