Abstract: The invention features a method for treating a patient infected with a virus. The method includes administering to the patient a molecule which is capable of specifically binding to a proteinaceous cell receptor expressed on a cell of the patient which cell contributes to the disease state of the patient, the molecule being capable of decreasing the viability of the cell.

Abstract: Disclosed is a hybrid molecule comprising a first part, a second part, and a third part connected by covalent bonds,(a) wherein said first part comprises a portion of the binding domain of a cell-binding polypeptide ligand effective to cause said hybrid protein to bind to a cell of an animal;(b) wherein said second part comprises a portion of a translocation domain of naturally occurring protein which translocates said third part across the cytoplasmic membrane into the cytosol of the cell; and(c) wherein said third part comprises a chemical entity to be introduced into the cell, wherein each of said first part and said third part is non-native with respect to said naturally occurring protein, and further wherein said covalent bond connecting said second part and said third part is a cleavable bond, provided that when said second part comprises a portion of a translocation domain of Pseudomonas exotoxin, said third part is not a polypeptide.

Abstract: Disclosed is a recombinant DNA molecule encoding a hybrid protein comprising a first part, a second part, and a third part,(a) wherein said first part comprises a portion of the binding domain of a cell-binding polypeptide ligand effective to cause said hybrid protein to bind to a cell of an animal;(b) wherein said second part comprises a portion of a translocation domain of naturally occurring protein selected from the group consisting of diphtheria toxin, botulinum neurotoxin, ricin, cholera toxin, LT toxin, C3 toxin, Shiga toxin, Shiga-like toxin, pertussis toxin and tetanus toxin, which translocates said third part across the cytoplasmic membrane into the cytosol of the cell; and(c) wherein said third part comprises a polypeptide entity to be introduced into the cell, wherein said third part is non-native with respect to said naturally occurring protein of (b).

Abstract: The invention features a method for treating a patient having inflammatory arthritis, the method includes administering to the patient a molecule which is capable of specifically binding to an epidermal growth factor receptor expressed on a cell of the patient which contributes to the inflammatory arthritis of the patient, the molecule being capable of decreasing the viability of the cell.

Abstract: A method for producing a mouse having a systemic malignant disease which mimics a human IL-2 expressing. T-cell malignancy, which includes administering to a mouse a mixture of passaged cells comprising cancer causing cells, the mixture having been rendered cancer causing by in vivo passage of tumor inducing cells in athymic mice.

Abstract: A hybrid molecule including a first part and a second part connected by a covalent bond,(a) the first part including a portion of the binding domain of a cell-binding ligand, which portion is able to cause the hybrid molecule of the invention to bind to an animal cell; and(b) the second part including a portion of a translocation domain of a protein, provided that (i) the hybrid molecule does not include an enzymatically-active portion of the protein, (ii) the first part and the second part are not segments of the same naturally-occurring polypeptide toxin, and (iii) the portion of the translocation domain, when covalently bonded to the enzymatically-active effector region of a toxin selected from diphtheria toxin, Pseudomonas exotoxin A, cholera toxin, ricin toxin, and Shiga-like toxin, is capable of translocating such effector region across the cytoplasmic membrane of the cell.

Abstract: The invention features a method for treating a patient having inflammatory arthritis, the method includes administering to the patient a molecule which is capable of specifically binding to an epidermal growth factor receptor expressed on a cell of the patient which contributes to the inflammatory arthritis of the patient, the molecule being capable of decreasing the viability of the cell.

Abstract: A method of treating a patient with diabetes involving administering to the patient a hybrid molecule which contains a cytotoxin covalently joined to interleukin-2 which is capable of binding to interleukin-2 receptor on a cell that contributes to the disease state of the cell and decreasing the viability of that cell.

Abstract: A method for purifying from a mixture of hybrid compound which contains a portion of IL-2, which portion includes at least a region of the IL-2R binding domain of IL-2, which region is effective to cause the hybrid compound to bind to cells containing an IL-2R. The method includes passing the mixture containing the hybrid compound over a column having attached thereto molecules consisting of or containing a complex sugar moiety with affinity for the hybrid compound, and eluting the hybrid compound with a suitable eluant. The invention also features related complexes of the hybrid compound and assays for the hybrid compound.