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[Cancer Research 59, 4291-4296, September 1, 1999]
© 1999 American Association for Cancer Research

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[Cancer Research 59, 4291-4296, September 1, 1999]
© 1999 American Association for Cancer Research


Clinical Investigations

Loss of PTEN Expression in Paraffin-embedded Primary Prostate Cancer Correlates with High Gleason Score and Advanced Stage1

Máirín E. McMenamin, Peggy Soung, Sauni Perera, Irving Kaplan, Massimo Loda2 and William R. Sellers2

Departments of Pathology [M. E. M.] and Radiation Oncology [I. K.], Beth Israel Deaconess Medical Center, Department of Pathology, Brigham and Women’s Hospital [M. L.], and the Department of Adult Oncology and the Lank Center for Genitourinary Oncology, Dana-Farber Cancer Institute [P. S., S. P., M. L., W. R. S.], Harvard Medical School, Boston, Massachusetts 02115

The tumor suppressor gene PTEN/MMAC-1/TEP-1 (referred to hereafter as PTEN) maps to chromosome 10q23 and encodes a dual specificity phosphatase. The PTEN protein negatively regulates cell migration and cell survival and induces a G1 cell cycle block via negative regulation of the phosphatidylinositol 3'-kinase/protein kinase B/Akt signaling pathway. PTEN is frequently mutated or deleted in both prostate cancer cell lines and primary prostate cancers. A murine polyclonal antiserum was raised against a glutathione S-transferase fusion polypeptide of the COOH terminus of PTEN. Archival paraffin tissue sections from 109 cases of resected prostate cancer were immunostained with the antiserum, using DU145 and PC-3 cells as positive and negative controls, respectively. PTEN expression was seen in the secretory cells. Cases were considered positive when granular cytoplasmic staining was seen in all tumor cells, mixed when areas of both positive and negative tumor cell clones were seen, and negative when adjacent benign prostate tissue but not tumor tissue showed positive staining. Seventeen cases (15.6%) of prostate cancer were positive, 70 cases (64.2%) were mixed, and 22 cases (20.2%) were negative. Total absence of PTEN expression correlated with the Gleason score (P = 0.0081) and correlated more significantly with a Gleason score of 7 or higher (P = 0.0004) and with advanced pathological stage (American Joint Committee on Cancer stages T3b and T4; P = 0.0078). Thus, loss of PTEN protein is correlated with pathological markers of poor prognosis in prostate cancer.




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G. Kulik, J. P. Carson, T. Vomastek, K. Overman, B. D. Gooch, S. Srinivasula, E. Alnemri, G. Nunez, and M. J. Weber
Tumor Necrosis Factor {{alpha}} Induces BID Cleavage and Bypasses Antiapoptotic Signals in Prostate Cancer LNCaP Cells
Cancer Res., March 1, 2001; 61(6): 2713 - 2719.
[Abstract] [Full Text]


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Clin. Cancer Res.Home page
J.-T. Dong, C.-L. Li, T. W. Sipe, and H. F. Frierson Jr.
Mutations of PTEN/MMAC1 in Primary Prostate Cancers from Chinese Patients
Clin. Cancer Res., February 1, 2001; 7(2): 304 - 308.
[Abstract] [Full Text]


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Genes Dev.Home page
C. Abate-Shen and M. M. Shen
Molecular genetics of prostate cancer
Genes & Dev., October 1, 2000; 14(19): 2410 - 2434.
[Full Text]


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Genes Dev.Home page
G. L. Semenza
HIF-1 and human disease: one highly involved factor
Genes & Dev., August 15, 2000; 14(16): 1983 - 1991.
[Full Text]


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Cancer Res.Home page
V. Stambolic, M.-S. Tsao, D. Macpherson, A. Suzuki, W. B. Chapman, and T. W. Mak
High Incidence of Breast and Endometrial Neoplasia Resembling Human Cowden Syndrome in pten+/- Mice
Cancer Res., July 1, 2000; 60(13): 3605 - 3611.
[Abstract] [Full Text]


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JNCI J Natl Cancer InstHome page
I. U. Ali
Gatekeeper for Endometrium: the PTEN Tumor Suppressor Gene
J Natl Cancer Inst, June 7, 2000; 92(11): 861 - 863.
[Full Text] [PDF]


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Cancer Res.Home page
H. Zhong, K. Chiles, D. Feldser, E. Laughner, C. Hanrahan, M.-M. Georgescu, J. W. Simons, and G. L. Semenza
Modulation of Hypoxia-inducible Factor 1{{alpha}} Expression by the Epidermal Growth Factor/Phosphatidylinositol 3-Kinase/PTEN/AKT/FRAP Pathway in Human Prostate Cancer Cells: Implications for Tumor Angiogenesis and Therapeutics
Cancer Res., March 1, 2000; 60(6): 1541 - 1545.
[Abstract] [Full Text]


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Hum Mol GenetHome page
G. Guanti, N. Resta, C. Simone, F. Cariola, I. Demma, P. Fiorente, and M. Gentile
Involvement of PTEN mutations in the genetic pathways of colorectal cancerogenesis
Hum. Mol. Genet., January 22, 2000; 9(2): 283 - 287.
[Abstract] [Full Text] [PDF]


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J. Biol. Chem.Home page
J. A. Gustin, T. Maehama, J. E. Dixon, and D. B. Donner
The PTEN Tumor Suppressor Protein Inhibits Tumor Necrosis Factor-induced Nuclear Factor kappa B Activity
J. Biol. Chem., July 13, 2001; 276(29): 27740 - 27744.
[Abstract] [Full Text] [PDF]


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Proc. Natl. Acad. Sci. USAHome page
M. Srivastava, L. Bubendorf, V. Srikantan, L. Fossom, L. Nolan, M. Glasman, X. Leighton, W. Fehrle, S. Pittaluga, M. Raffeld, et al.
ANX7, a candidate tumor suppressor gene for prostate cancer
PNAS, April 10, 2001; 98(8): 4575 - 4580.
[Abstract] [Full Text] [PDF]




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