Abstract: The present invention provides antibodies or fragments thereof that bind to cancer cells and is important in physiological phenomena, such as cell rolling and metastasis. Therapeutic and diagnostic methods and compositions using such antibody fragments thereof are also provided. The methods and compositions according to the present invention can be used in targeting therapeutic agents and in diagnosis, prognosis, and staging of and therapy for such diseases as cancer, including tumor growth and metastasis, leukemia, auto-immune disease, and inflammatory disease. Also provided is a library of immunoglobulin binding domains having a diverse antigen-binding domain for complementary binding, wherein the library has diversity only in heavy chain CDR3.

Abstract: The present invention is directed to a peptide or polypeptide comprising an Fv molecule, a construct thereof, a fragment of either, or a construct of a fragment having enhanced binding characteristics so as to bind selectively and/or specifically to a target cell in favor of other cells, wherein the binding selectivity or specificity is primarily determined by a first hypervariable region, and wherein the Fv is a scFv or a dsFv, and optionally having one or more tags. The enhanced binding is directed to a substantially exposed and/or over-expressed binding site on or in a target comprising a cell in favor of other cells on or in which the binding site is not substantially available and/or expressed. The invention is further directed to a method for isolating such peptides and polypeptides from a phage display library and to the nucleic acid molecules encoding them.

Abstract: The present invention is directed to novel peptides and polypeptides that specifically bind to target cells and may have anti-cancer activity, especially blood-related cancers. The present invention includes a peptide or polypeptide comprising an Fv molecule, having a heavy variable chain comprising CDR3, CDR2 and CDR1 regions comprising the amino acid sequences SEQ ID NOS:8, 115 and 114, respectively.

Abstract: The present invention provides antibodies or fragments thereof that bind to co-receptor CCR5 or CXCR4.

Abstract: The present invention provides antibodies that bind an epitope of PSGL-1 comprising the motif D-X-Y-D, wherein X represents any amino acid or the covalent linkage between D and Y, and Y is sulfated, which antibody can be complexed with one or more copies of an agent. The antibodies of the invention can be used in a method of inducing antibody-dependent cell cytotoxicity and/or stimulating natural killer (NK) cells or T cells. In addition, by administering these antibodies to a patient in need thereof, a method of inducing cell death is provided. A method of preventing infection by a virus (e.g., HIV) by administering to a patient in need thereof an antibody of the present invention is also provided. The, present invention also provides a method of introducing an agent into a cell that expresses sulfated PSGL-1 by coupling or complexing an agent to an antibody of the present invention and administering the complex to the cell.

Abstract: The present invention provides antibodies or fragments thereof that bind to cancer cells and is important in physiological phenomena, such as cell rolling and metastasis. Therapeutic and diagnostic methods and compositions using such antibody fragments thereof are also provided. The methods and compositions according to the present invention can be used in targeting therapeutic agents and in diagnosis, prognosis, and staging of and therapy for such diseases as cancer, including tumor growth and metastasis, leukemia, auto-immune disease, and inflammatory disease. Also provided is a library of immunoglobulin binding domains having a diverse antigen-binding domain for complementary binding, wherein the library has diversity only in heavy chain CDR3.

Abstract: The present invention provides antibodies or fragments thereof that bind to cancer cells and are important in physiological phenomena, such as cell rolling and metastasis. Therapeutic and diagnostic, prognostic or staging methods and compositions using such antibodies or fragments thereof are also provided. The methods and compositions according to the present invention can be used in diagnosis of and therapy for such diseases as cancer, including tumor growth and metastasis, leukemia, auto-immune disease, and inflammatory disease.

Abstract: The present invention is directed to a peptide or polypeptide comprising an Fv molecule, a construct thereof, a fragment of either, or a construct of a fragment having enhanced binding characteristics so as to bind selectively and/or specifically to a target cell in favor of other cells, wherein the binding selectivity or specificity is primarily determined by a first hypervariable region, and wherein the Fv is a scFv or a dsFv, and optionally having one or more tags. The enhanced binding is directed to a substantially exposed and/or over-expressed binding site on or in a target comprising a cell in favor of other cells on or in which the binding site is not substantially available and/or expressed. The invention is further directed to a method for isolating such peptides and polypeptides from a phage display library and to the nucleic acid molecules encoding them.