A method of diagnosing B-CLL in a subject in need thereof is provided. The method comprising determining in a biological sample of the subject a level of CD84 isoform C (SEQ ID NO: 30), wherein an increase in the level of the CD84 isoform C (SEQ ID NO: 30) beyond a predetermined threshold with respect to a level of the CD84 in a biological sample from a healthy individual is indicative of the B-CLL.

Provided are a method of testing NK cell activity, including: specifically stimulating at least two distinguishable factors on NK cells in a sample; measuring a synergistic activation level of the NK cells; and comparing the synergistic activation level of the NK cells with that of normal NK cells, and a composition for testing NK cell activity. In addition, the present disclosure relates to a kit for diagnosing an NK cell synergistic activity-associated disease, the kit including the composition.

A method of diagnosing B-CLL in a subject in need thereof is provided. The method comprising determining in a biological sample of the subject a level of CD84 isoform C (SEQ ID NO: 30), wherein an increase in the level of the CD84 isoform C (SEQ ID NO: 30) beyond a predetermined threshold with respect to a level of the CD84 in a biological sample from a healthy individual is indicative of the B-CLL.

An isolated antibody comprising an antigen recognition domain which specifically binds CD84 and (i) down regulates the anti-apoptotic activity of stromal cells on chronic lymphocytic leukemia (CLL) cells; and/or (ii) induces mobilization of CLL cells from the bone marrow.

Also provided are antibodies comprising antigen recognition domains comprising complementarity determining regions as indicated and uses thereof.

The invention provides LFA3 polypeptide molecules, e.g., variant LFA3 fusion polypeptide molecules. The invention includes uses, and associated methods of using the LFA3 polypeptide molecules.

This invention relates to humanized antibodies that selectively bind the 31.1 epitope on the A33 protein differentially expressed in cancers including, lung cancer, ovarian cancer, pancreas cancer, breast cancer, and colon cancer, and diagnostic and therapeutic usages.

An isolated antibody comprising an antigen recognition domain which specifically binds CD84 and (i) down regulates the anti-apoptotic activity of stromal cells on chronic lymphocytic leukemia (CLL) cells; and/or (ii) induces mobilization of CLL cells from the bone marrow. Also provided are antibodies comprising antigen recognition domains comprising complementarity determining regions as indicated and uses thereof.

This invention relates to humanized antibodies that selectively bind the 31.1 epitope on the A33 protein differentially expressed in cancers including, lung cancer, ovarian cancer, pancreas cancer, breast cancer, and colon cancer, and diagnostic and therapeutic usages.

The invention provides LFA3 polypeptide molecules, e.g., variant LFA3 fusion polypeptide molecules. The invention includes uses, and associated methods of using the LFA3 polypeptide molecules.

This invention relates to humanized antibodies that selectively bind the 31.1 epitope on the A33 protein differentially expressed in cancers including, lung cancer, ovarian cancer, pancreas cancer, breast cancer, and colon cancer, and diagnostic and therapeutic usages.