Abstract: Vigorous growth of endothelial cells from human umbilical vein endothelial cells in vitro is achieved using a culture medium containing endothelial cell growth factor and heparin and/or dextran sulfate. Cell population doubling times of 13 to 21 hours for 60 to 85 populations doublings are obtained, and cloned human endothelial cell strains are established having similar proliferative capacities.

Abstract: The present invention is directed to in vitro and in vivo immunodiagnosis and immunotherapy using monoclonal antibodies reactive with difucosyl blood group antigens Y-6 and B-7-2.

Abstract: The present invention is directed to monoclonal antibodies, and hybridomas which produce them, which are reactive with ganglioside antigens GD2 and GD3 and are essentially non-reactive with other ganglioside antigens. The invention further relates to methods of using these antibodies.

Abstract: A method of separating DNA molecules by gel electrophoresis is disclosed which employs alternate application of high and low strength electric fields in opposite directions to a gel matrix containing DNA. The high strength field is maintained for a shorter interval than the low strength field, and the ratio of the product of the low strength field and its pulse interval to the product of the high strength field and its pulse interval is greater than 4:1 and sufficient to produce a net migration of the DNA molecules in the direction of the low strength field.

Abstract: It has been determined that nerve growth factor binds to a cell surface protein of human neural crest origin having a molecular weight of about 75,000 daltons. New monoclonal antibodies specifically imunoprecipitate these receptor molecules, and also inhibit binding of the hormone to the receptor. These monoclonal antibodies show significantly higher reactivity with primary and metastatic melanoma cell lines than with melanocytes. The antibodies are used in a diagnostic method for histochemical detection of human neural crest disease.

Abstract: A method of inducing an immunological response in a host to a virus is provided employing anti-idiotype antibodies that present an internal image of a viral antigen to the host. Anti-idiotype antibodies and the cell lines that produce such antibodies are also provided.

Abstract: B-cell neoplasm is detected by hybridizing lymphocytic DNA with DNA probes that identify chromosomal translocations between human chromosomes 11 and 18.

Abstract: Somatic cell hybrids of purely human origin are described that are suitable fusion partners for producing hybridomas by fusion with antibody producing cells, which hybridomas are stable and continuous.

Abstract: Nuclear transplantation in the mouse embryo is achieved by using a method that combines microsurgical removal of the zygote pronuclei with the introduction of a donor nucleus by a virus-mediated cell fusion technique.

Abstract: Monoclonal anti-ornithine decarboxylase antibody is produced by cell hybrids between hypoxanithine phosphoriboxyltransferase deficient myeloma cells and spleen cells derived from an animal previously immunized with ornithine decarboxylase. By means of immunoaffinity chromatography using cyanogen bromide-activated agarose coupled with the antibody, ornithine decarboxylase in animal cell extracts can be highly purified in high yield.

Abstract: A live rotavirus vaccine against bovine and human rotaviruses comprising a strain of live bovine rotavirus which does not hemagglutinate primate red blood cells, gives at least about 20 fold higher titers when neutralized with antiserum therefor as compared to heterologous bovine or primate rotaviruses, and has a migration pattern of its RNA genome segments when determined by PAGE substantially as shown by lane WC3 in FIG. 1, the strain of bovine rotavirus having been serially passaged in primate kidney tissue culture a sufficient number of times that when administered to humans the vaccine is immunogenic without causing disease.

Abstract: The present invention provides a stable, continuous human myeloma cell line which is capable of hybridization with antibody-producing cells of humans and other animals, the cell line being a mutant of GM 1500 human B cells and being deficient in hypoxanthine phosphoribosyltransferase. The invention also comprises processes for the production of hybrid cells employing the stable, HPRT-deficient human myeloma cell line, and processes for the production of antibodies employing such hybrid cells.

Abstract: An assay for determining the Lewis blood group of a patient consists of testing a body sample for the presence of Lewis.sup.a and Lewis.sup.b antigens. Monoclonal antibodies specific for either of these antigens are employed which do not cross-react with other related antigens, such as the H blood antigen. Body samples which may be tested include: saliva, serum, urine, and paraffin-embedded tissue samples. Hybridoma cell lines and the antibody compositions they produce specific for these antigens are provided for use in the assay.

Abstract: pML BK is a hybrid plasmid which is constructed of :pML which contains the entire nucleotide sequence of the plasmid pBR322 except for deletion of nucleotide sequences 1120-2490 bp and 0 to 375 bp, and BK which contains the entire nucleotide sequence of the Gardner strain of BK virus except for deletion of nucleotide sequences between bp 5089-5196. Into the pML BK plasmid may be inserted a viral or human gene X to be expressed, an example of which is TK which represents the Bam HI generated 3,600 bp DNA fragment of herpes simplex virus type 1 which contains the herpes simplex virus type 1 TK DNA. The majority of the pML BK X DNA molecules remain in the episomal or free state in the human cells 143B and express the gene X.

Abstract: An assay for HLA D phenotype wherein antigen-pulsed monocytes are contacted with antigen-specific T lymphocytes or T cell hybridomas and the extent of selective binding between the pulsed monocytes and the T lymphocytes or T cell hybridomas determines HLA D phenotype of the monocyte. The assay is particularly useful for quickly typing donor tissue prior to transplantation.

Abstract: Colorectal carcinoma is detected by testing body fluids for the colorectal carcinoma monosialoganglioside identified by monoclonal antibodies produced by fused cell hybrid ATCC HB 8059.

Abstract: Human hepatoma cell lines, useful for metabolic studies such as screening potential carcinogens and mutagens, for cultivation of viruses, and for preparation of vaccines is obtained by culturing human hepatocarcinoma or hepatoblastoma on lethally irradiated cell feeder layers in the presence of a culture medium.

Abstract: The present invention provides a cDNA which carries the code for the glycoprotein of the ERA-strain rabies virus.

Abstract: It has been determined that 180,000 dalton molecular weight carcinoembryonic antigen has an antigen site which is not shared by other molecular weight carcinoembryonic antigens, which are released by colorectal carcinoma. A hybridoma antibody specific for the 180,000 dalton molecular weight carcinoembryonic antigen is described.

Abstract: A human osteogenic sarcoma cell line chronically infected with human cytomegalovirus having a substantially constant ratio between immunofluorescent positive and noninfected cells useful in the immunofluorescent serological test for determining the presence of human cytomegalovirus antibody.