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Novel Anti-CD30 Antibodies and Recombinant Immunotoxins Containing Disulfide-Stabilized Fv Fragments

Posted Jun 13 2010 5:00pm

Description of Invention:
The present invention discloses the creation of new anti-CD30 stalk antibodies and anti-CD30 dsFv-immunotoxins, which have shown good cytotoxic activity.

CD30 is a member of the tumor necrosis factor receptor super family. It is an excellent target due to its high expression in malignant Reed Sternberg cells of Hodgkin's Lymphoma (HL) and in anaplastic large cell lymphomas (ALCL), and due to its expression in only a small subset of normal lymphocytes. Previous attempts to target CD30 include the scFv immunotoxin Ki-4 that has shown specific binding to CD30-positive lymphoma cell lines and killed target cells.

As claimed in this patent application, some of the antibodies do not bind or bind very weakly CD30 released from cells, although they do bind strongly to cell associated CD30. This enhancement further increases the ability of immunotoxins and other immunoconjugates to target and treat lymphomas expressing CD30.

The immunotoxins of the present invention are more stable and have higher affinity for CD30 then their predecessors. Research thus far has shown that the dsFv-immunotoxins are able to kill a variety of CD30-positive lymphoma cell lines in vitro as well as CD30-transfected A431 cells via specific binding to CD30.

Ira H Pastan (NCI)

Patent Status:
HHS, Reference No. E-135-2002/1
US, , Patent No. 7,470,775, Issued 30 Dec 2008

Licensing Status:
In addition to licensing, the technology is available for further development through collaborative research opportunities with the inventors.

Cancer - Therapeutics
In-vitro Data

For Additional Information Please Contact:
David Lambertson Ph.D.
NIH Office of Technology Transfer
6011 Executive Blvd. Suite 325,
Rockville, MD 20852
United States
Phone: 301-435-4632
Fax: 301-402-0220

Ref No: 644

Updated: 06/2010

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