Growth and Gene Expression Profile Analyses of Endometrial Cancer Cells Expressing Exogenous PTEN
[CANCER RESEARCH 61, 3741–3749, May 1, 2001] Growth and Gene Expression Profile Analyses of Endometrial Cancer Cells Expressing Exogenous PTEN Mieko Matsushima-Nishiu, Motoko Unoki, Kenji Ono, Tatsuhiko Tsunoda, Takeo Minaguchi, Hiroyuki Kuramoto, Masato Nishida, Toyomi Satoh, Toshihiro Tanaka, and Yusuke Nakamura1 Laboratories of Molecular Medicine [M. M-N., M. U., K. O., T. M., T. Ta., Y. N.] and Genome Database [T. Ts.], Human Genome Center, Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan; Department of Obstetrics and Gynecology, School of Medicine, Kitasato University, Sagamihara 228-8555, Japan [H. K.]; Department of Obstetrics and Gynecology, Institute of Clinical Medicine, University of Tsukuba, Tsukuba 305-8576, Japan [M. N.]; and Department of Obstetrics and Gynecology, Ibaraki Seinan Central Hospital, Tsukuba 306-0433, Japan [T. S.] ABSTRACT Akt/protein kinase B, cell survival, and cell proliferation (8). Over- expression of PTEN can decrease cell proliferation and tumorigenicity The PTEN tumor suppressor gene encodes a multifunctional phospha- (9, 10), an observation attributed to the ability of PTEN to induce cell tase that plays an important role in inhibiting the phosphatidylinositol-3- cycle arrest and apoptosis (11, 12). kinase pathway and downstream functions that include activation of Akt/protein kinase B, cell survival, and cell proliferation. Enforced ex- Thus, lack of PTEN expression may affect a complex set of pression of PTEN in various cancer cell lines decreases cell proliferation transcriptional targets. However, no systematic assessment of PTEN- through arrest of the cell cycle, accompanied in some cases by induction regulated targets in cancer cells has been reported to date.
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