The invention concerns the use of human or humanized chimeric monoclonal
antibodies which are produced in selected cell lines, said antibodies
bringing about a high ADCC activity as well as a high secretion of
cytokines and interleukins, for treating underpopulations of so-called
weak-response patients exhibiting CD16 FCGR3A-158F homozygote or
FCGR3A-158V/F heterozygote polymorphism.