Abstract: Treatment of cancer in a patient comprises administering to the patient an effective amount of an antibody and an effective amount of NK cells, wherein the antibody binds an antigen on the surface of the NK cells and the antibody binds to an Fc receptor on a cell of the cancer. Anticancer activity is via resultant killing action of the NK cell on the cancer cell now binding the antibody via R-ADCC.

Abstract: Treatment of cancer in a patient comprises administering to the patient an effective amount of an antibody and an effective amount of NK cells, wherein the antibody binds an antigen on the surface of the NK cells and the antibody binds to an Fc receptor on a cell of the cancer. Anticancer activity is via resultant killing action of the NK cell on the cancer cell now binding the antibody via R-ADCC.

Abstract: A rapid, simple method of directly transfecting a large number of eukaryotic, prokaryotic or plant cells, which retains substantial cell viability is achieved by the present invention. The method includes the steps of contacting with cells adhered to a support, an amount of polynucleotide molecule targeted for transfection into the cells and an amount of particles. A gentle agitation of the cells, polynucleotide molecules and particles permits direct transfection of the polynucleotide molecules into the cells.

Abstract: A chimeric, non-human, genetically-immunocompetent mammal is disclosed. The hematopoietic system of the mammal has human passaged bone marrow stromal cells and human hematopoietic stem cells obtained from a CD34.sup.+ -enriched bone marrow fraction, and also contains transplanted syngeneic non-lymphoid spleen colony cells. The mammal may be a mouse, a rat, a rabbit, a cat, a dog, a pig, a sheep or a non-human primate. The mammal can be produced by providing a non-human, genetically-immunocompetent mammal in which its immunologic genotype comports with the norm for the species of the mammal, exposing the mammal to a level of x- or gamma-radiation that is sufficient to destroy substantially all bone marrow in the mammal to render the mammal phenotypically immunodeficient, then transplanting into the mammal syngeneic non-lymphoid spleen colony cells and human passaged bone marrow stromal cells, and transplanting into the mammal human hematopoietic stem cells obtained from a CD34.sup.