Imperial College London
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DrBarbaraMulloy

Faculty of Medicine, Department of Metabolism, Digestion and Reproduction

Visiting Professor
 
 
 
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Contact

 

b.mulloy Website

 
 
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Location

 

Burlington DanesHammersmith Campus

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Summary

 

Publications

Citation

BibTex format

@article{Hogwood:2018:10.1371/journal.pone.0193482,
author = {Hogwood, J and Naggi, A and Torri, G and Page, C and Rigsby, P and Mulloy, B and Gray, E},
doi = {10.1371/journal.pone.0193482},
journal = {PLoS ONE},
title = {The effect of increasing the sulfation level of chondroitin sulfate on anticoagulant specific activity and activation of the kinin system},
url = {http://dx.doi.org/10.1371/journal.pone.0193482},
volume = {13},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Oversulfated chondroitin sulfate (OSCS) was identified as a contaminant in certain heparin preparations as the cause of adverse reactions in patients. OSCS was found to possess both plasma anticoagulant activity and the ability to activate prekallikrein to kallikrein. Differentially sulfated chondroitin sulfates were prepared by synthetic modification of chondroitin sulfate and were compared to the activity of OSCS purified from contaminated heparin. Whilst chondroitin sulfate was found to have minimal anticoagulant activity, increasing sulfation levels produced an anticoagulant response which we directly show for the first time is mediated through heparin cofactor II. However, the tetra-sulfated preparations did not possess any higher anticoagulant activity than several tri-sulfated variants, and also had lower heparin cofactor II mediated activity. Activation of prekallikrein was concentration dependent for all samples, and broadly increased with the degree of sulfation, though the di-sulfated preparation was able to form more kallikrein than some of the tri-sulfated preparations. The ability of the samples to activate the kinin system, as measured by bradykinin, was observed to be through kallikrein generation. These results show that whilst an increase in sulfation of chondroitin sulfate did cause an increase in anticoagulant activity and activation of the kinin system, there may be subtler structural interactions other than sulfation at play given the different responses observed.
AU  - Hogwood,J
AU  - Naggi,A
AU  - Torri,G
AU  - Page,C
AU  - Rigsby,P
AU  - Mulloy,B
AU  - Gray,E
DO  - 10.1371/journal.pone.0193482
PY  - 2018///
SN  - 1932-6203
TI  - The effect of increasing the sulfation level of chondroitin sulfate on anticoagulant specific activity and activation of the kinin system
T2  - PLoS ONE
UR  - http://dx.doi.org/10.1371/journal.pone.0193482
UR  - https://www.ncbi.nlm.nih.gov/pubmed/29494632
UR  - http://hdl.handle.net/10044/1/57976
VL  - 13
ER  -
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