Disclosed is a method for searching, identifying, or validating a marker CACNA2D1 of tumor-initiating cells. The method comprises a step of immunizing an animal using HEP-12 cells originating from a recurrent tumor and rich in originating cells. Also disclosed is a monoclonal antibody specially recognizing CACNA2D1 or antigen-binding fragments thereof, and the use thereof for treating or preventing tumors or diseases or conditions related to CACNA2D1.

Mice having a restricted immunoglobulin heavy chain locus are provided, wherein the locus is characterized by a single polymorphic human V.sub.H gene segment, a plurality of human D.sub.H gene segments and a plurality of J.sub.H gene segments. Methods for making antibody sequences that bind an antigen (e.g., a viral antigen) are provided, comprising immunizing a mouse with an antigen of interest, wherein the mouse comprises a single human V.sub.H gene segment, a plurality of human D.sub.H gene segments and a plurality of J.sub.H gene segments, at the endogenous immunoglobulin heavy chain locus.

The present invention relates to monoclonal antibodies targeting the membrane bound IgM (mIgM) of the B-cell receptor complex found in B-cell lymphomas and leukemias. Monoclonal antibodies designated mAb4-2b, mAb1-1, mAb2-2b and mAb3-2b were produced by hybridoma cell lines (ATCC deposit no. PTA-121716), (ATCC deposit no. PTA-121719), (ATCC deposit no. PTA-121717), and (ATCC deposit no. PTA-121718), respectively. Another aspect of the present invention is the use of anti-B-Cell mIgM antibodies in the treatment of B-cell malignancies, including B-cell lymphomas and leukemias.

The present invention is directed to a monoclonal antibody that recognizes human CD9 in its native form. The invention is also directed to a hybridoma cell line that produces the monoclonal antibody, and exosome isolation kits using the antibody.

A method for cloning a full length coding sequence for a light chain of a rabbit monoclonal antibody is provided. In some embodiments, this method may involve: fusing a B cell from a rabbit having a B4 allotype with a 240E cell or a derivative thereof to produce a hybridoma, wherein the B cell and the hybridoma produce a monoclonal antibody; making cDNA from the hybridoma; amplifying from the cDNA a full length coding sequence for the light chain of a monoclonal antibody produced by the hybridoma using: a forward primer that hybridizes to a site in SEQ ID NO: 10, and a reverse primer having a 3 end of sequence CTARCAGTCX (SEQ ID NO: 11), wherein R is A or G and X is A, AC, ACC or ACCC; and cloning the amplified sequence into an expression vector to produce a first plasmid.

The present invention relates to an anti-ICAM-1 antibody or an antigen-binding fragment thereof that specifically binds to ICAM-1, and the use thereof. Specifically, provided are an anti-ICAM-1 antibody or an antigen-binding fragment thereof, a pharmaceutical composition for regulating differentiation and/or function of dendritic cell, and a pharmaceutical composition for preventing and/or treating immune cell-mediated disease, the composition comprising the antibody or the antigen-binding fragment as an active ingredient.

The invention relates to specific binding members, particularly antibodies and active fragments thereof, which recognize an aberrant post-translationally modified, particularly an aberrant glycosylated form of the EGFR. The binding members, particularly antibodies and fragments thereof, of the invention do not bind to EGFR on normal cells in the absence of amplification of the wild-type gene and are capable of binding the de2-7 EGFR at an epitope which is distinct from the junctional peptide. Antibodies of this type are exemplified by the novel antibody 806 whose VH and VL sequences are illustrated as SEQ ID NOs: 2 and 4 and chimeric antibodies thereof as exemplified by ch806.