The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 2004
Filed:
May. 04, 1999
Herve Bazin, Brussels, BE;
Dominique Latinne, Brussels, BE;
Universite Catholique de Louvain, Louvain-la-Neuve, BE;
Abstract
Although the mechanism of induction of apoptosis through antibody dependent cellular cytotoxicity (ADCC) mediated by NK cells is well understood, little is known about the fate of the reactive NK cells. Nevertheless, it has been shown that NK cells previously activated by IL-2, but not naive NK cells, died by apoptosis after Fc&ggr;RIIIa crosslinking, or after engagement in cytolytic functions. It is demonstrated that apoptosis of naive NK cells is also observed after stimulation with a rat IgG2 anti CD2 mAb (LO-CD2 /BTI-322) or anti HLAI (LO-HLA-1)mAb. The NK apoptosis is rapid (within minutes), Fas-ligand and mRNA synthesis independent and does not require a cell contact. The intracellular mechanism of NK cell apoptosis is calcium, PKC and PLA2 dependent but calcineurin and P13 kinase independent. We suggest that NK cell apoptosis results from the crosslinking on the same cell surface of CD2 or HLA-I molecules and Fc&ggr;RIIIa that exhibits a high affinity for the rat IgG2 isotype. The clinical application of these experiments are discussed.