Immunoglobulin M antiplatelet autoantibodies from mice immunized with rat platelets induce thrombocytopenia and platelet function impairment.
Exp Biol Med (Maywood)
; 235(12): 1464-71, 2010 Dec.
Article
de En
| MEDLINE
| ID: mdl-21127343
ABSTRACT
Antiplatelet monoclonal autoantibodies (mAbs) were derived from CBA mice immunized with rat platelets. Two IgM antiplatelet mAbs were further analyzed. L1C43 mAb bound a 150-160 kDa antigen, recognized activated platelets better than resting ones and impaired platelet adhesion, but not clot retraction. L1H31 mAb recognized a ±95 kDa molecule, bound similarly activated and resting platelets and did not modify platelet adhesion, but inhibited clot retraction. Both mAbs induced in vivo thrombocytopenia most likely through phagocytosis of opsonized platelets. These autoreactive antibodies can thus induce both platelet destruction and impairment of their function. They are reflective of autoantibodies found in human patients and may serve for further analysis of antiplatelet autoantibody pathogenicity and mechanisms of autoimmune disease.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Autoanticorps
/
Thrombopénie
/
Plaquettes
/
Immunoglobuline M
/
Anticorps monoclonaux
Limites:
Animals
Langue:
En
Journal:
Exp Biol Med (Maywood)
Sujet du journal:
BIOLOGIA
/
FISIOLOGIA
/
MEDICINA
Année:
2010
Type de document:
Article
Pays d'affiliation:
Belgique