Skip to Content


Prospective Grant of Exclusive License: The Development of Immunotoxins/Targeted Toxins for the Treatment of Human Cancers

Document Details

Information about this document as published in the Federal Register.

Published Document

This document has been published in the Federal Register. Use the PDF linked in the document sidebar for the official electronic format.

Start Preamble


National Institutes of Health, Public Health Service, DHHS.




This is notice, in accordance with 35 U.S.C. 209(c)(1) and 37 CFR 404.7(a)(1)(i), that the National Institutes of Health, Department of Health and Human Services, is contemplating the grant of an exclusive patent license to practice the inventions embodied in U.S. Patent Application 61/241,620 entitled “Development of an Immunotoxin in Which All B-Cell Epitopes Have Been Removed and Which Has High Cytotoxic Activity” [HHS Ref. E-269-2009/0-US-01], U.S. Patent Application 60/969,929 entitled “Deletions in Domain II of Pseudomonas Exotoxin A That Reduce Non-Specific Toxicity” [HHS Ref. E-292-2007/0-US-01], U.S. Patent Application 60/703,798 entitled “Mutated Pseudomonas Exotoxins with Reduced Antigenicity” [HHS Ref. E-262-2005/0-US-01], U.S. Patent Application 60/160,071 entitled “Immunoconjugates Having High Binding Affinity” [HHS Ref. E-139-1999/0-US-01], U.S. Patent Application 60/067,175 entitled “Antibodies, Including Fv Molecules, and Immunoconjugates Having High Binding Affinity for Mesothelin and Methods for Their Use” [HHS Ref. E-021-1998/0-US-01], U.S. Patent Application 60/010,166 entitled “Molecular Cloning of Mesothelin, a Differentiation Antigen Present on Mesothelium, Mesotheliomas and Ovarian Cancers” [HHS Ref. E-002-1996/0-US-01], PCT Application PCT/US97/00224 entitled “Mesothelin Antigen and Methods and Kits for Targeting It” [HHS Ref. E-002-1996/1-PCT-01], U.S. Patent 5,747,654 entitled “Recombinant Disulfide-Stabilized Polypeptide Fragments Having Binding Specificity” [HHS Ref. E-163-1993/0-US-01], PCT application PCT/US96/16327 entitled “Immunotoxin Containing A Disulfide-Stabilized Antibody Fragment” [HHS Ref. E-163-1993/2-PCT-01], U.S. Patent Application 07/596,291 entitled “A Monoclonal Antibody” [HHS reference E-195-1990/0-US-01], and all continuing applications and foreign counterparts, to Morphotek, Inc. The patent rights in these inventions have been assigned to and/or exclusively licensed to the Government of the United States of America.

The prospective exclusive license territory may be worldwide, and the field of use may be limited to:

The use of the MORAb-009-PE-LR/8X immunotoxin for the treatment of mesothelin-expressing cancers, the use of the anti-CD300LF-PE/LR/8X immunotoxin for the treatment of CD300LF-expressing cancers such as acute myelogenous leukemia (AML), and the use of annexin A2-targeted PE-LR/8X toxin for the treatment of annexin A2-expressing cancers such as glioma, ovarian cancer and pancreatic cancer.


Only written comments and/or applications for a license which are received by the NIH Office of Technology Transfer on or before October 14, 2010 will be considered.


Requests for copies of the patent application, inquiries, comments, and other materials relating to the contemplated exclusive license should be directed to: David A. Lambertson, PhD., Senior Licensing and Patenting Manager, Office of Technology Transfer, National Institutes of Health, 6011 Executive Boulevard, Suite 325, Rockville, MD 20852-3804; Telephone: (301) 435-4632; Facsimile: (301) 402-0220; E-mail:

End Preamble Start Supplemental Information


These inventions concern immunotoxins and targeted toxins, and methods of using the immunotoxins/targeted toxins for the treatment of (a) mesothelin-expressing cancers (such as mesothelioma, ovarian cancer and pancreatic cancer), (b) CD300LF-expressing cancers (such as acute myelogenous leukemia (AML)) or (c) Annexin A2-expressing cancers (such as glioma, ovarian cancer and pancreatic cancer). Several specific immunotoxins/targeted toxins are covered by this technology, including MORAb-009-PE-LR/8X, anti-CD300LF-PE-LR/8X and Annexin A2-targeted PE-LR/8X.

Each of these immunotoxins/targeted toxins comprises (1) a toxin moiety (PE-LR/8X) that is a modified version of the Pseudomonas exotoxin A (“PE”) and (2) either (a) an antibody fragment domain that is capable of binding to mesothelin, (b) an antibody fragment domain that is capable of binding to CD300LF, or (c) a peptide that is capable of binding to Annexin A2. The toxin moiety been modified in various manners in order reduce immunogenicity, thereby improving the therapeutic value of PE while maintaining its ability to trigger cell death. Since mesothelin, CD300LF and Annexin A2 are each preferentially expressed on certain types of cancer cells, the targeting domains of the immunotoxins/targeted toxins (MORAb-009, anti-CD300LF and Annexin A2 binding peptide) allows the immunotoxins/targeted toxins to selectively bind to certain cancer cells so that only the cancer cells are killed. This results in an effective therapeutic strategy with fewer side effects due to less non-specific killing of cells.

The prospective exclusive license will be royalty bearing and will comply with the terms and conditions of 35 U.S.C. 209 and 37 CFR 404.7. The prospective exclusive license may be granted unless the NIH receives written evidence and argument that establishes that the grant of the license would not be consistent with the requirements of 35 U.S.C. 209 and 37 CFR 404.7 within thirty (30) days from the date of this published notice.

Applications for a license in the field of use filed in response to this notice will be treated as objections to the grant of the contemplated exclusive license. Start Printed Page 55810Comments and objections submitted to this notice will not be made available for public inspection and, to the extent permitted by law, will not be released under the Freedom of Information Act, 5 U.S.C. 552.

Start Signature

Dated: September 7, 2010.

Richard U. Rodriguez,

Director, Division of Technology Development & Transfer, Office of Technology Transfer, National Institutes of Health.

End Signature End Supplemental Information

[FR Doc. 2010-22844 Filed 9-13-10; 8:45 am]