Articles

Diagnosis and treatment of thrombotic thrombocytopenic purpura

BJH - volume 11, issue 6, october 2020

E. Roose PhD, S. Deconinck , C. Dekimpe , A. Curie , SF. De Meyer PhD, K. VanHoorelbeke PhD, D. Dierickx MD, PhD

SUMMARY

Thrombotic thrombocytopenic purpura (TTP) is a rare and life-threatening thrombotic microangiopathic disorder (TMA) due to a severe deficiency of ADAMTS13 (A Disintegrin And Metalloprotease with Thrombo-Spondin type 1 repeats, member 13). The deficiency in ADAMTS13 can either be caused by mutations in ADAMTS13 (congenital TTP or Upshaw-Schulman syndrome, cTTP) or by anti-ADAMTS13 autoantibodies (immune-mediated TTP, iTTP). Diagnosis of TTP is challenging but crucial for the survival of the patient. TTP should be suspected when microangiopathic haemolytic anaemia and severe thrombocytopenia are observed. A severely decreased ADAMTS13 activity (activity <10%) should confirm the diagnosis of TTP. Standard treatment of TTP is plasma therapy (plasma exchange for iTTP, while plasma infusion for cTTP), but novel therapeutics like rituximab, caplacizumab and recombinant ADAMTS13 show promising results regarding the recovery and sustained remission of TTP patients. However, although major advances have been made in the management of TTP, TTP is a chronic disease and patients still relapse, careful and stringent patient follow-up is needed to improve the patients’ quality of life.

(BELG J HEMATOL 2020;11(6):253-60)

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O04 THE PRESENCE OF ANTI-ADAMTS13 AUTO-ANTIBODIES DOES NOT CHANGE ADAMTS13 ANTIGEN LEVELS MEASURED BY AN IN HOUSE DEVELOPED ADAMTS13 ANTIGEN ELISA

BJH - 2019, issue ?, february 2019

C. Dekimpe , C. Tersteeg PhD, E. Roose PhD, C. Vendramin , N. VanDePutte , I. Pareyn , A. Vandenbulcke , H. Deckmyn PhD, M. Scully , E. Tellier , S.F. De Meyer PhD, K. VanHoorelbeke PhD

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O06 OPEN ADAMTS13 CONFORMATION IN IMMUNE-MEDIATED THROMBOTIC THROMBOCYTOPENIC PURPURA IS INDUCED BY ANTI-ADAMTS13 AUTOANTIBODIES

BJH - 2019, issue ?, february 2019

E. Roose PhD, A.-S. Schelpe , E. Tellier , G. Sinkovits , G. Kaplanski , M. Le Besnerais , I. Mancini , H.B. Feys PhD, N. VanDePutte , A. Vandenbulcke , I. Pareyn , J. Voorberg , A. Greinacher , Y. Benhamou , H. Deckmyn PhD, R. Fijnheer , Z. ProhÁszka , F. Peyvandi , P. Coppo , S.F. De Meyer PhD, A. Veyradier , K. VanHoorelbeke PhD

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A-130 INHIBITING ADAMTS13 ACTIVITY PREVENTS THE LOSS OF HIGH MOLECULAR WEIGHT VWF MULTIMERS IN AN IN VITRO LEFT VENTRICULAR ASSIST DEVICE

BJH - volume 9, issue Abstract Book BSTH, february 2018

S. Deconinck , A. Rauch , E. Roose PhD, N. VanDePutte , C. Tersteeg PhD, H. Deckmyn PhD, S.F. De Meyer PhD, S. Susen , K. VanHoorelbeke PhD

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A-140 AN OPEN CONFORMATION OF ADAMTS13 IS A HALLMARK OF ACUTE ACQUIRED THROMBOTIC THROMBOCYTOPENIC PURPURA

BJH - volume 9, issue Abstract Book BSTH, february 2018

E. Roose PhD, A.-S. Schelpe , B.S. Joly , A. Vandenbulcke , I. Pareyn , L. Desender , N. VanDePutte , M. Peetermans , P. Verhamme MD, PhD, J. Voorberg , A. Greinacher , H. Deckmyn PhD, S.F. De Meyer PhD, P. Coppo , A. Veyradier , K. VanHoorelbeke PhD

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A-129 UNRAVELING ANTI-SPACER IMMUNOPROFILES OF ACQUIRED TTP PATIENTS USING ANTI-IDIOTYPIC ANTIBODIES

BJH - volume 9, issue Abstract Book BSTH, february 2018

A.-S. Schelpe , E. Roose PhD, F. Peyvandi , B. Joly , I. Pareyn , H. Deckmyn PhD, J. Voorberg , P. Coppo , A. Veyradier , S.F. De Meyer PhD, K. VanHoorelbeke PhD

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A-145 PLASMA OF HEALTHY DONORS CONTAINS SPECIFIC ANTI-IDIOTYPIC ANTIBODIES THAT RECOGNIZE TWO CLONED HUMAN ANTI-ADAMTS13 AUTOANTIBODIES

BJH - volume 9, issue Abstract Book BSTH, february 2018

K. Kangro , E. Roose PhD, S. Horta , A.-S. Schelpe , L. Desender , R. Visser , G. Vidarsson , A. Männik , H.B. Feys PhD, H. Deckmyn PhD, S.F. De Meyer PhD, K. VanHoorelbeke PhD

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