The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2020
Filed:
May. 04, 2012
Ira H. Pastan, Potomac, MD (US);
John Weldon, Columbia, MD (US);
Richard Beers, Rockville, MD (US);
Abstract
Mesothelin is a differentiation antigen present on the surface of ovarian cancers, mesotheliomas and several other types of human cancers. Because among normal tissues, mesothelin is only present on mesothelial cells, it represents a good target for antibody mediated delivery of cytotoxic agents. The present invention is directed to improved recombinant immunotoxins comprising anti-mesothelin antibodies, including Fv molecules with particularly high affinity for mesothelin, and aExotoxin moiety which has been modified to reduce its immunogenicity and protease sensitivity and providing a better cytotoxicity for cells which express mesothelin. The RITs are well-suited for the treatment of cancers of the ovary, stomach, squamous cells, mesotheliomas and other malignant cells expressing mesothelin.