Neorx Corporation

Other

Aletheon Pharmaceuticals, Inc.

James A Sanderson

Alan R Fritzberg

Sudhakar Kasina

Ananthachari Srinivasan

John M Reno

Louis J Theodore

Paul G Abrams

Donald B Axworthy

Scott Stoll Graves

Stephen Charles Goshorn

Joanne Elaine Schultz

Yukang Lin

The present invention provides vectors for expressing genomic streptavidin fusion cassettes. In the various embodiments, fusion proteins produced from these vectors are provided. In particular embodiments, fusion proteins comprising a single chain antibody and genomic streptavidin are provided as are vectors encoding the same. Also provided, are methods of using the fusion proteins of the present invention, and in particular, the use of scFvSA fusion proteins as diagnostic markers or as a cell specific targeting agents.

Streptavidin expressed gene fusions and methods of use thereof

Methods, compounds, compositions and kits that relate to pretargeted delivery of diagnostic and therapeutic agents are disclosed. In particular, methods for radiometal labeling of biotin and for improved radiohalogenation of biotin, as well as related compounds, are described. Also, clearing agents, anti-ligand-targeting moiety conjugates, target cell retention enhancing moieties and additional methods are discussed.

Pretargeting methods and compounds

Conjugates of trichothecenes and agents that bind to a defined population of cells are disclosed. Preferred are conjugates of trichothecene molecules with polyclonal or monoclonal antibodies or fragments thereof that recognize antigens that are present only on tumor cells or are augmented in their expression on tumor cells as compared to normal tissues. Trichothecene molecules are coupled to the agent through non-covalent and covalent linkages, such as peptide bonds, disulfide bonds, thioester bonds, or thioether bonds. A method for inhibiting the growth and metabolism of antigen-positive cells is also disclosed. Derivatized trichothecene compounds prepared for conjugation to targeting agents are also disclosed.

Trichothecene conjugates

Novel labeling reagents are useful for radiolabeling proteins such as antibodies with radionuclide metals such as .sup.99m Tc, .sup.186 Re, and .sup.188 Re. The reagents are of the following formula: ##STR1## wherein: each X is independently chosen from O, S, NH, or NR.sub.2, wherein R.sub.2 is a protecting group or an electron withdrawing group; R.sub.1 represents a protecting group, wherein each R.sub.1 is a separate protecting group or the two R.sub.1 symbols are taken together to represent a single protecting group; and each T is independently chosen from hydrogen, lower alkyl groups of from 1 to about 6 carbon atoms, electron withdrawing groups, and lower alkyl groups of from 1 to about 6 carbon atoms substituted with electron withdrawing group(s).

Protein labeling reagents

Novel labeling reagents are useful for radiolabeling proteins such as antibodies with radionuclide metals such as .sup.99m Tc, .sup.186 Re, and .sup.188 Re. The reagents are of the following formula: ##STR1## wherein: each X is independently chosen from O, S, NH, or NR.sub.2, wherein R.sub.2 is a protecting group or an electron withdrawing group;

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Seattle, WA, United States of America

James A Sanderson