Abstract: Chimeric human antibody expression vectors are constructed by inserting the antibody heavy chain variable region-encoding cDNA and antibody light chain variable region-encoding cDNA isolated from hybridomas producing a mouse or rat monoclonal antibody reacting with the ganglioside GM.sub.2 respectively into an expression vector for use in animal cells which contains the human antibody heavy chain constant region- or human antibody light chain constant region-encoding cDNA. The expression vectors are introduced into animal cells and the transformant thus obtained is cultured for the production of a chimeric human antibody reacting with the ganglioside GM.sub.2.

Abstract: The present invention provides monoclonal antibodies and humanized antibodies which react specifically with a human interleukin-5 receptor .alpha. chain. The invention also provides hybridomas and transformants which produce the antibodies, the monoclonal antibodies and humanized antibodies, a method for detecting an interleukin-5 receptor .alpha. chain immunologically by means of these antibodies, as well as a method for diagnosing and treating diseases such as chronic bronchial asthma by means of the monoclonal antibodies and humanized antibodies. The present invention is useful for diagnosis or treatment of diseases such as chronic bronchial asthma.

Abstract: The present invention relates to a method for reconstruction of animal organ which comprises perfusing a cell-dispersible solution to animal organ from vascular system and then perfusing a cell culture medium whereby the organ is reconstructed.According to the present invention, the organ can be reconstructed and cultured for long term without separating most of cells which constitute the animal organ.

Abstract: Described is a monoclonal antibody capable of specifically binding to fibroblast growth factor-8 (FGF-8) which is related to growth factors of hormone-dependent tumor cells such as prostatic cancer and breast cancer, and inhibits the FGF-8 activity. The monoclonal antibody is useful in analyzing the role and biological function of FGF-8 in hormone-dependent tumor cells such as prostatic cancer and breast cancer and can be beneficial in the treatment of these cancers.

Abstract: An immunological assay for quantifying PEG-modified human granulocyte colony stimulating factor or derivatives thereof in a sample comprising bringing into contact with said sample an antibody which reacts with the human granulocyte colony stimulating factor or its derivative and with PEG-modified human granulocyte colony stimulating factor or its derivative and a monoclonal antibody which reacts specifically with the human granulocyte colony stimulating factor or its derivative but not with the PEG-modified human granulocyte-colony stimulating factor or its derivative.

Abstract: Chimeric human antibody expression vectors are constructed by inserting the antibody heavy chain variable region-encoding cDNA and antibody light chain variable region-encoding cDNA isolated from hybridomas producing a mouse or rat monoclonal antibody reacting with the ganglioside GM.sub.2 respectively into an expression vector for use in animal cells which contains the human antibody heavy chain constant region- or human antibody light chain constant region-encoding cDNA. The expression vectors are introduced into animal cells and the transformant thus obtained is cultured for the production of a chimeric human antibody reacting with the ganglioside GM.sub.2.

Abstract: An anti-ribonucleotide reductase (RNR) R2 subunit monoclonal antibody KM1054, KM1056 or KM1060, which belongs to the IgG2a subclass, reacts with R2 subunit of RNR, and inhibits RNR activity, is disclosed. It is effective for immunologically detecting RNR and for immunologically detecting the presence of human cancer cells.

Abstract: Chimeric human antibody expression vectors are constructed by inserting the antibody heavy chain variable region-encoding cDNA and antibody light chain variable region-encoding cDNA isolated from hybridomas producing a mouse or rat monoclonal antibody reacting with the ganglioside GM.sub.2 respectively into an expression vector for use in animal cells which contains the human antibody heavy chain constant region- or human antibody light chain constant region-encoding cDNA. The expression vectors are introduced into animal cells and the transformant thus obtained is cultured for the production of a chimeric human antibody reacting with the ganglioside GM.sub.2.

Abstract: A humanized chimera antibody, a pharmaceutical composition comprising a humanized chimera antibody and a pharmaceutically acceptable carrier, and a method of treating cancer which comprises administering to a patient a pharmaceutically acceptable amount of said humanized chimera antibody, are disclosed.

Abstract: Chimeric human antibody expression vectors are constructed by inserting the antibody heavy chain variable region-encoding cDNA and antibody light chain variable region-encoding cDNA isolated from hybridomas producing a mouse or rat monoclonal antibody reacting with the ganglioside GM.sub.2 respectively into an expression vector for use in animal cells which contains the human antibody heavy chain constant region- or human antibody light chain constant region-encoding cDNA. The expression vectors are introduced into animal cells and the transformant thus obtained is cultured for the production of a chimeric human antibody reacting with the ganglioside GM.sub.2.

Abstract: A humanized chimera antibody, a process for its production and methods for its use are disclosed. The chimera antibody is produced without changing any amino acids of its mouse antibody variable region.

Abstract: A humanized chimera antibody, a pharmaceutical composition comprising a humanized chimera antibody and a pharmaceutically acceptable carrier, and a method of treating cancer which comprises administering to a patient a pharmaceutically acceptable amount of said humanized chimera antibody, are disclosed.

Abstract: Monoclonal antibodies specific for human pulmonary adenocarcinoma recognizing sialylated glycoproteins or glycolipids as antigens but not reactive with normal human lung tissue. Hybridomas having the characteristics of cell line ALC-186 secrete such antibodies. Methods of diagnosing human pulmonary adenocarcinoma by immunoassay and immunohistochemical staining methods are described.

Abstract: There are provided a novel .alpha.2.fwdarw.3 sialyltransferase expressed by a cloned gene from animal cells, a cDNA encoding the .alpha.2.fwdarw.3 sialyltransferase, a method for detecting or suppressing the expression of an .alpha.2.fwdarw.3 sialyltransferase by use of said cDNA, a recombinant vector containing said cDNA, a cell containing said vector, and their production processes.

Abstract: This invention relates to monoclonal antibodies capable of specifically reacting with a peptide encoded by tumor suppressor gene DCC gene and to hybridomas capable of producing such monoclonal antibodies. In particular, the invention relates to mouse monoclonal antibody KM890 belonging to the IgG3 subclass, which is specifically reactive with a DCC gene DCC-2, and to a hybridoma KM890 capable of producing the monoclonal antibody KM890.The monoclonal antibodies of this invention which are specifically reactive with DCC gene products can be used in immunohistochemical staining, quantitative determination of DCC gene products and the like, as well as in cancer diagnosis.

Abstract: There are provided a novel .alpha.2.fwdarw.3 sialyltransferase expressed by a cloned gene from animal cells, a cDNA encoding the .alpha.2.fwdarw.3 sialyltransferase, a method for detecting or suppressing the expression of an .alpha.2.fwdarw.3 sialyltransferase by use of said cDNA, a recombinant vector containing said cDNA, a cell containing said vector, and their production processes.

Abstract: A method for preparing de-N-acylated forms of an N-acyl sugar-containing glycosphingolipid and lyso forms of glycosphingolipid comprising hydrolyzing the glycosphingolipids under mild alkaline conditions such that the N-acyl group of the sugar moiety is preferentially hydrolyzed. Substantially pure gangliosides containing de-N-acetyl-sialic acid isolated from natural sources. A culture medium for stimulating growth of human and animal cells comprising: essential nutrients for cell growth, and a cell growth stimulatory amount of one or more gangliosides containing de-N-acetyl-sialic acid. A method for stimulating growth of human and animal cells cultured in vitro with a cell growth stimulatory amount of one or more gangliosides containing de-N-acetyl-sialic acid.

Abstract: An anti-human gastric cancer monoclonal antibody, AMC-462, which belongs to the class IgG.sub.1, reacts with human digestive system cancer, and recognizes sialylated glycoproteins or glycolipids as the antigen is disclosed. It is effective for diagnosis of digestive system cancer, especially pancreatic cancer.

Abstract: A monoclonal antibody is disclosed capable of reacting with abnormal glycogen from patients with Lafora disease (Lafora bodies) and with abnormal glycogen from patients with type IV glycogenosis but not with normal glycogen, and therefore useful in the diagnosis of Lafora disease and type IV glycogenosis (Andersen's disease).

Abstract: A monoclonal antibody is disclosed capable of specifically reacting with the human mesothelial cell but not with other normal cells and human tumor cells, and therefore applicable in diagnosis of cancers.