Abstract: The present invention provides a secreted protein (A55) produced by murine embryonic cardiac cells and a polynucleotide encoding the protein. The invention also provides a second secreted protein (A55b) produced by a splice variant of the gene encoding the first protein, and a polynucleotide encoding the variant. Finally, the invention also provides methods for utilizing the two proteins in the treatment and prevention of diseases, such as through the inhibition of proliferation of vascular smooth muscle cells and through the regulation of physiological activities including hematopoietic cell activity, tissue forming/repairing activity, activin/inhibin activity, chemotactic/chemokinetic activity, blood coagulating and thrombotic activity.

Abstract: A polypeptide prepared from mouse ES cell strains by the SST method and a homologous polypeptide obtained from mouse kidney, human uterus, mouse fetus, human fetal liver and pancreas libraries; a cDNA encoding the polypeptide; a fragment selectively hybridizing with the sequence of the cDNA; a replication or expression plasmid containing the cDNA integrated thereinto; a host cell transformed with plasmid; an antibody against the polypeptide; and a pharmaceutical composition containing the polypeptide or the antibody.

Abstract: The present invention relates to human, rat and mouse stem cell-derived neuron survival factor polypeptides (SDNSF), a process for producing them, cDNA encoding SDNSF, a vector comprising the cDNA, host cells transformed by the vector, an antibody against SDNSF, pharmaceutical compositions containing SDNSF or the antibody, a method of assaying SDNSF, a reagent for assaying SDNSF, and a screening method using SDNSF. The polypeptides are effective in the survival of nerve cells and, therefore, efficacious in treating injury to the central nerve system caused by brain infarction, brain hemorrhage, spinal cord injury, etc.

Abstract: Substances comprising a substance that recognizes PD-1, a substance that recognizes a membrane protein co-existing with PD-1 on a cell membrane, and a linker.

Abstract: Genes encoding novel proteins named AID (Activation-Induced cytidine Deaminase), that are structurally related to APOBEC-1, an RNA editing enzyme, and have a cytidine deaminase activity similar to APOBEC-1, have been found by preparing cDNA libraries from mouse B cell clone CH12F3-2 (which undergoes class switch recombination from IgM to IgA at an extremely high rate after activation of the cells by stimulation with cytokines), with and without stimulation with cytokines, and performing subtraction cloning using the libraries.

Abstract: It relates to BALB/c mice that defect programmed cell death-1 receptor (PD-1), a screening method of autoimmune disease medicine by use of these mice, IgG self-reactivity antibody that the mice produce specifically, protein specifically reacted to the antibody and produced in heart, and an diagnostic method in dilated cardiomyopathy by use of the protein.

Abstract: The invention discloses a useful and novel factor (polypeptide) which plays an important role for morbid vascular smooth muscle in restenosis after percutaneous transluminal coronany angioplasty (PTCA) and arterial sclerosis in the field of cardiovascular system.

Abstract: Novel proteins and methods of treatment using same are disclosed.

Abstract: Genes encoding novel proteins named AID (Activation-Induced cytidine Deaminase), having structural relationship to APOBEC-1, one of RNA editing enzymes, and having a cytidine deaminase activity similar to APOBEC-1, has been found by preparing cDNA libraries for mouse B cell clone CH12F3-2, which undergoes class switch recombination from IgM to IgA at an extremely high rate together with activation of cells by stimulation with cytokines, with and without stimulating with cytokine, and performing subtraction cloning using the libraries.

Abstract: A polypeptide comprising 295 amino acids which is produced by mouse bone marrow stromal cells, a method of producing the polypeptide, a DNA encoding the polypeptide, a fragment which selectively hybridized the DNA sequence, a replication or expression vector comprising the DNA, a host cell transfected with the vector, an antibody of the peptide, a pharmaceutical composition containing the polypeptide or the antibody.

Abstract: A polypeptide prepared from mouse ES cell strains by the SST method and a homologous polypeptide obtained from mouse kidney, human uterus, mouse fetus, human fetal liver and pancreas libraries; a cDNA encoding the polypeptide; a fragment selectively hybridizing with the sequence of the cDNA; a replication or expression plasmid containing the cDNA integrated thereinto; a host cell transformed with plasmid; an antibody against the polypeptide; and a pharmaceutical composition containing the polypeptide or the antibody.

Abstract: Novel human immunoglobulin V.sub.H segments and DNA fragments containing the same are disclosed. The DNA fragment according to the present invention is the fragment having a size of about 800 kbp which is shown in FIG. 1. The human immunoglobulin V.sub.H segments according to the present invention are contained in the fragment of this DNA fragment of about 800 kbp, and there are 50 novel segments. The base sequences of these :segments are shown in the Sequence Listing. The present invention also provides DNA fragments which contain two or more of these V.sub.H segments.

Abstract: The polypeptides of the present invention are produced and secreted in pro-B cells, so they may be used for diseases relating to undergrown or abnormal proliferation of hematopoietic cells, neuronal enhancement or depression, immunological enhancement and depression, for example, inflammatory diseases (rheumatoid arthritis, ulcerative colitis etc.), hematopoietic stemcytopenia after bone marrow transplantation, leukocytopenia, thrombocytopenia, B lymphopenia and T lymphopenia after chemotherapy, anemia, infectious diseases, cancer, leukocytosis, AIDS, neurodegenerative diseases (Alzheimer, multiple sclerosis etc.), prevention of treatment of neuronal injury, prevention of treatment of disorder of bone metabolism (osteoporosis etc.) or tissue repair. The DNA of the present invention may be utilized as an important and essential template in preparing the polypeptides of the present invention which are expected to possess various use or for diagnosis of an in the treatment of gene diseases.

Abstract: A membrane protein related to human programmed cell death (PD-1) and DNA encoding the said protein is provided. PD-1 protein may be useful for the treatment of various infections, immunological depression or acceleration, or tumors etc.

Abstract: A membrane protein related to human programmed cell death (PD-1) and DNA encoding the said protein is provided. PD-1 protein may be useful for the treatment of various infections, immunological depression or acceleration, or tumors etc.

Abstract: The Stromal Derived Factor-1.alpha. (SDF-1.alpha.) and Stromal Derived Factor-1.beta. (SDF-1.beta.) polypeptides of the present invention are produced and secreted in pro-B cells, so they may be used for diseases relating to undergrown or abnormal proliferation of hematopoietic cells, neuronal enhancement or depression, immunological enhancement and depression, for example, inflammatory diseases (rheumatoid arthritis, ulcerative colitis etc.), hematopoietic stemcytopenia after bone marrow transplantation, leukocytopenia, thrombocytopenia, B lymphopenia and T lymphopenia after chemotherapy, anemia, infectious diseases, cancer, leukocytosis, AIDS, neurodegenerative diseases (Alzheimer, multiple sclerosis etc.), prevention or treatment of neuronal injury, prevention or treatment of disorder of bone metabolism (osteoporosis etc.) or tissue repair.

Abstract: A cDNA and a chromosomal DNA coding for the human B-cell differentiation factor were provided and the entire nucleotide sequence of said DNAs as well as the entire amino acid sequences of the polypeptide portion of mature human B-cell differentiation factor and the leader peptide were revealed. The method for producing human B-cell differentiation factor by a recombinant gene technology was also provided.

Abstract: The present invention relates to (1) a process for constructing a cDNA library which has a selectivity for signal peptides, that makes it possible to efficiently find out an unknown and useful polypeptide and a high efficiency; and relates to (2) a novel polypeptide consisting of 89 amino acids (including a signal peptide) produced by a stroma cell line, which is useful as an agent for preventing or treating, for example, anemia, leukopenia or infections and the like, and DNAs encoding for said polypeptide.

Abstract: Mouse IgG.sub.1 inducing factor and the DNA that codes for the same were isolated by using a novel genetic technique, and their structures determined by the dideoxy chain termination method. The mouse IgG.sub.1 inducing factor obtained by the method of this invention has activity to improve immune response in living bodies and are hence useful for the treatment and prevention of infectious diseases, AIDS, functional immunodeficiency and the like. This factor, or part of its amino acid sequence, may also be used for the preparation of antibody against the same. In addition, it is possible to use this factor as a model for the synthesis of other polypeptides having similar structures, and for many other purposes.

Abstract: A cDNA and a chromosomal DNA coding for the human B-cell differentiation factor were provided and the entire nucleotide sequence of said DNAs as well as the entire amino acid sequences of the polypeptide portion of mature human B-cell differentiation factor and the leader peptide were revealed. The method for producing human B-cell differentiation factor by a recombinant gene technology was also provided.