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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

CD11a-c/CD18 and GP84 (LB-2) adhesion molecules on human large granular lymphocytes and their participation in natural killing.

Effect of mAb against the CD11a-c, CD18, and GP84 adhesion molecules on the binding and cytotoxicity of human NK cells was studied. The target cells were K562, MOLT-4, Raji, and fresh uncultured autologous endometrial carcinoma cells. Antibodies against adhesion relevant epitopes of CD11a(TA-1/ LFA-1), CD11b(Mol/OKM1/ Mac1), or CD11c (Leu-M5) did not inhibit NK function. The mAb 60.3 against CD18, the common beta-chain associated to CD11a-c, strongly inhibited both the binding and cytotoxicity of large granular lymphocytes (LGL) against all the target cells tested. Also the antibody LB-2 against the GP84 adhesion molecule inhibited NK function to some degree. 60.3 and LB-2 antibodies exerted an additive effect in the inhibition of both binding and cytotoxicity. However, even this antibody combination did not completely block NK activity, suggesting a heterogeneity of adhesion structures in the NK system. According to both FACS analyses and immunoprecipitation studies, all the tested antibodies recognized either a subpopulation or all of LGL. On the other hand, antibodies against CD11b, CD11c, and LB-2 showed only marginal reactivity with highly purified LGL-free T cells.[1]


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