Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Peptide containing doai
Reexamination Certificate
2008-01-23
2009-11-03
Woodward, Cherie M (Department: 1647)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Peptide containing doai
C514S04400A, C435S375000, C435S456000, C435S466000
Reexamination Certificate
active
07612042
ABSTRACT:
The present invention discloses a method using human soluble ErbB3, for example p85-sErbB3, as a negative regulator of heregulin-stimulated ErbB2, ErbB3, and ErbB4 activation. The present invention also discloses p85-sErbB3 binding to heregulin with an affinity comparable to that of full-length ErbB3, and competitively inhibiting high affinity heregulin binding to ErbB2/ErbB3 heterodimers on the cell surface of breast carcinoma cells. The present invention also uses p85-sErbB3 to inhibit heregulin-induced phosphorylation of ErbB2, ErbB3, and ErbB4 in cells, as a negative regulator of heregulin-stimulated signal transduction, and as a block for cell growth. The present invention is also directed to nucleic acids and expression vectors encoding p85-sErbB3, host cells harboring such expression vectors, and methods of producing the protein. The present invention discloses a method of therapeutically treating human malignancies associated with heregulin-mediated cell growth such as breast and prostate cancer.
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Hakjoo Lee
Maihle Nita J.
Cohen & Grigsby P.C.
Tumor Biology Investment Group, Inc.
Woodward Cherie M
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