# US 5,710,255 A · Characterization of a novel anti-p110.sup.RB monoclonal antibody

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- Number: US 5,710,255 A
- Document ID: US5710255A
- Status: Granted
- Kind: A
- Application number: 08/204,329
- Filed: 1994-08-15
- Granted: 1998-01-20
- Earliest claimed: 1994-08-15
- Assignees: Canji, Inc.
- Inventors: H. Michael Shepard; Shu Fen Wen
- Web page: https://patentgrep.com/patent/US5710255A

## CPC

- C07K 16/18: against material from animals or humans
- A61P 35/00: Antineoplastic agents
- C07K 14/4736: {Retinoblastoma protein}
- A61K 38/00: Medicinal preparations containing peptides (peptides containing beta-lactam rings A61K31/00; cyclic dipeptides not having in their molecule any other peptide link than those which form their ring, e.g. piperazine-2,5-diones, A61K31/00; ergot alkaloids of the cyclic peptide type A61K31/48; containing macromolecular compounds having statistically distributed amino acid units A61K31/74; medicinal preparations containing antigens or antibodies A61K39/00; medicinal preparations characterised by the non-active ingredients, e.g. peptides as drug carriers, A61K47/00)
- C12N 2799/026: where the vector is derived from a baculovirus
- C07K: PEPTIDES (peptides in foodstuffs A23; obtaining protein compositions for foodstuffs, working-up proteins for foodstuffs A23J; preparations for medicinal purposes A61K; peptides containing beta-lactam rings C07D; cyclic dipeptides not having in their molecule any other peptide link than those which form their ring, e.g. piperazine-2,5-diones, C07D; ergot alkaloids of the cyclic peptide type C07D519/02; macromolecular compounds having statistically distributed amino acid units in their molecules, i.e. when the preparation does not provide for a specific; but for a random sequence of the amino acid units, homopolyamides and block copolyamides derived from amino acids C08G69/00; macromolecular products derived from proteins C08H1/00; preparation of glue or gelatine C09H; single cell proteins, enzymes C12N; genetic engineering processes for obtaining peptides C12N15/00; compositions for measuring or testing processes involving enzymes C12Q; investigation or analysis of biological material G01N33/00)
- A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- C12N: MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA (microbiological testing media C12Q1/00)

## Abstract

This invention provides a family of monoclonal antibodies specific for epitopes of p110.sup.RB protein present in the nucleus. These antibodies have superior properties that prove useful for the detection of p110.sup.RB or its complexes with other cellular regulatory proteins in cells and in cell lysates. This invention also provides hybridoma cell lines that produce such monoclonal antibodies and methods of using these antibodies diagnostically, prognostically and therapeutically. Further, the invention provides a method for isolating proteins associated with p110.sup.RB proteins.

## Claims

### Claim 1

An antibody which specifically binds an epitope comprising amino acid residues 886 to 905 of the human wild-type retinoblastoma (RB) tumor suppressor protein (SEQ. ID No. 1), wherein the antibody is the monoclonal antibody designated as 3C8.

### Claim 2 (depends on 1)

A hybridoma producing the monoclonal antibody of claim 1, wherein the hybridoma is ATCC HB-12312.