Chemistry: natural resins or derivatives; peptides or proteins; – Proteins – i.e. – more than 100 amino acid residues – Lymphokines – e.g. – interferons – interlukins – etc.
Reexamination Certificate
2007-01-23
2007-01-23
Landsman, Robert S. (Department: 1647)
Chemistry: natural resins or derivatives; peptides or proteins;
Proteins, i.e., more than 100 amino acid residues
Lymphokines, e.g., interferons, interlukins, etc.
C530S350000, C530S402000
Reexamination Certificate
active
09453851
ABSTRACT:
Conjugates containing as a ligand chemokine receptor targeting agents, such as chemokines, and a targeted agent, such as a toxin are provided. These conjugates are used to treat inflammatory responses associated with activation, proliferation and migration of immune effector cells, including leukocyte cell types, neutrophils, macrophages, and eosinophils. The conjugates provided herein are used to lessen or inhibit these processes to prevent or at least lessen the resulting secondary effects. In particular, the conjugates can be used to target toxins to receptors on secondary tissue damage-promoting cells. The ligand moiety can be selected to deliver the cell toxin to such secondary tissue damage-promoting cells as mononuclear phagocytes, leukocytes, natural killer cells, dendritic cells, and T and B lymphocytes, thereby suppressing the proliferation, migration, or physiological activity of such cells. Among preferred conjugates are fusion proteins having a chemokine, or a biologically active fragment thereof, as the ligand moiety linked to a cell toxin via a peptide linker of from 2 to about 60 amino acid residues.
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Abstract No. XP000881561, P. Roby, et al., Mela
Coggins Philip J.
McDonald John R.
Landsman Robert S.
Osprey Pharmaceuticals, Ltd.
Seidman Stephanie
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