ADAMTS13 activity in sickle cell disease

Schnog, JJ; Hovinga, JA; Krieg, S; Akin, S; Lämmle, B; Brandjes, DP; Mac Gillavry, MR; Muskiet, FD; Duits, AJ; CURAMA, Study Group (2006). ADAMTS13 activity in sickle cell disease. American journal of hematology, 81(7), pp. 492-8. New York, N.Y.: Wiley-Liss 10.1002/ajh.20653

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Sickle red blood cell (SRBC)-endothelial adhesion plays a central role in sickle cell disease (SCD)-related vaso-occlusion. As unusually large von Willebrand factor (ULVWF) multimers mediate SRBC-endothelial adhesion, we investigated the activity of ADAMTS13, the metalloprotease responsible for cleaving ULVWF multimers, in SCD. ADAMTS13 activity was determined using a quantitative immunoblotting assay. VWF:Ag and VWF:RCo were determined using commercial assays. The high-molecular-weight VWF multimer percentage was determined by employing gel electrophoresis. ADAMTS13 activity was similar among asymptomatic patients (n = 8), patients at presentation with a painful crisis (n = 23), and healthy controls. ADAMTS13/VWF:Ag ratios were lower in patients compared to healthy HbAA controls, with the lowest values at presentation with a painful crisis (P = 0.02). Division of samples in those with VWF:RCo/VWF:Ag ratios < 0.70 and those with ratios >or= 0.70 revealed significantly more samples with ratios >or= 0.70 (P = 0.01) collected during painful crises. ULVWF multimers were detected in 6 patient samples and in 1 control sample. ADAMTS13/VWF:Ag ratios were inversely related to the duration of symptoms at presentation with an acute vaso-occlusive event (r(s)-0.67, P = 0.002). Although SCD is characterized by elevated VWF:Ag levels, no severe ADAMTS13 deficiency was detected in our patients.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Department of Haematology, Oncology, Infectious Diseases, Laboratory Medicine and Hospital Pharmacy (DOLS) > Clinic of Haematology and Central Haematological Laboratory
UniBE Contributor:	Kremer Hovinga Strebel, Johanna Anna, Lämmle, Bernhard
ISSN:	0361-8609
ISBN:	16755558
Publisher:	Wiley-Liss
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:50
Last Modified:	02 Mar 2023 23:22
Publisher DOI:	10.1002/ajh.20653
PubMed ID:	16755558
Web of Science ID:	000238742300003
URI:	https://boris.unibe.ch/id/eprint/21190 (FactScience: 5167)