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p53 and canine tissue

Jeffrey Smoot jsmoot at cas.org
Tue Sep 2 09:07:41 EST 1997

De Groote Dominic wrote:
> Hello,
> Does anybody know an antibody directed against p53 which crossreacts
> with canine tissue.
> Thanks,
> De Groote Dominic

Suggest you correspond with these folks.

Jeffrey Smoot  (jsmoot at cas.org)
614-447-3600 X3198
Chemical Abstract Services http://www.cas.org
STN Easy http://stneasy.cas.org
ChemCemter http://www.ChemCenter.org
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TI   p53 Tumor suppressor protein overexpression in osteogenic tumors of
AU   Sagartz, J. E.; Bodley, W. L.; Gamblin, R. M.; Couto, C. G.; Tierney,
     L. A.; Capen, C. C.
CS   College Veterinary Medicine, Ohio State University, Columbus, OH, USA
SO   Vet. Pathol. (1996), 33(2), 213-21

AB   Alterations in the p53 tumor suppressor gene have been implicated in
     the genesis and/or progression of the majority of human cancers,
     including osteosarcoma.  Stabilization of the protein by mutation or
     interaction with other proteins prolongs its half-life, rendering it
     detectable by immunohistochem.  Osteosarcoma is the most common
     primary canine bone tumor and is characterized by frequent early
     metastases.  Multilobular tumors of bone involve primarily flat bones
     of the head and are low-grade malignancies with lower metastatic
     potential.  The objectives here were to det. the prevalence of p53
     protein overexpression in 106 osteogenic tumors of dogs using an
     indirect immunohistochem. method and to compare p53 overexpression
     between tumors with different clin. behavior.  A polyclonal p53
     antibody (CM-1) served as the primary antibody.  Tumors were scored
     based upon an est. of the percentage of tumor cells stained.
     Differences in the prevalence of overexpression were obsd. between
     osteosarcomas (72%) and multilobular tumors of bone (20%).
     Osteosarcomas of the appendicular skeleton had a higher prevalence of
     p53 overexpression (84%) than did osteosarcomas of the axial skeleton
     (56%).  Apparently, the p53 tumor suppressor protein is overexpressed
     in the majority of canine osteosarcomas.  The higher prevalence of
     overexpression in osteosarcomas vs. multilobular tumors of bone and
     in osteosarcomas of the appendicular skeleton vs. those of the axial
     skeleton suggests that alterations in p53 expression correlate with
     highly aggressive tumor behavior.

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