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Improved survival associated with somatic PIK3CA mutations in copy‑number low endometrioid endometrial adenocarcinoma

  • Authors:
    • Douglas I. Lin
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    Affiliations: Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
    Copyright: © Lin et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2743-2748
    |
    Published online on: September 15, 2015
       https://doi.org/10.3892/ol.2015.3702
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Abstract

The phosphoinositide‑3‑kinase (PI3K) signaling pathway has been implicated in the development of endometrioid endometrial adenocarcinoma (EEC). Recently, The Cancer Genome Atlas (TCGA) project stratified EEC into four molecular subgroups, with the majority of tumors falling into the copy‑number low‑EEC (CNL‑EEC) molecular subgroup. The aim of the present study was to investigate whether alterations of the PI3K pathway are associated with specific survival outcomes in patients with EEC. The clinical and genomic data of 307 patients with endometrioid‑type tumors were obtained from TCGA project, including 90 patients in the CNL‑EEC subgroup. Patients were evaluated in terms of survival and clinicopathological characteristics, as well as mutations in the PI3K catalytic subunit alpha (PIK3CA) gene and their effect on PIK3CA function. In CNL‑EEC subgroup patients, somatic PIK3CA mutations (48/90 cases) were associated with significantly improved overall survival compared with that of wild‑type PIK3CA (P=0.018). Furthermore, this improved survival was specific to the CNL‑EEC subgroup and was not observed in other TCGA molecular subgroups. The majority of CNL‑EEC cases were low‑stage (stage I) and low‑to‑intermediate grade (grades 1‑2) endometrioid tumors. There were no significant differences in age, stage, histology or International Federation of Gynecology and Obstetrics grade between PIK3CA‑mutated and non‑mutated patient groups (P>0.05). In addition, the majority of cases contained activating PIK3CA mutations. Overall, in the TCGA cohort, PIK3CA mutations had a favorable effect on the survival of patients with EEC, and this effect was dependent on tumoral molecular sub‑stratification. Future studies on larger independent cohorts with long term follow‑up are warranted to further analyze this association.
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Copy and paste a formatted citation
Spandidos Publications style
Lin DI: Improved survival associated with somatic PIK3CA mutations in copy‑number low endometrioid endometrial adenocarcinoma. Oncol Lett 10: 2743-2748, 2015.
APA
Lin, D.I. (2015). Improved survival associated with somatic PIK3CA mutations in copy‑number low endometrioid endometrial adenocarcinoma. Oncology Letters, 10, 2743-2748. https://doi.org/10.3892/ol.2015.3702
MLA
Lin, D. I."Improved survival associated with somatic PIK3CA mutations in copy‑number low endometrioid endometrial adenocarcinoma". Oncology Letters 10.5 (2015): 2743-2748.
Chicago
Lin, D. I."Improved survival associated with somatic PIK3CA mutations in copy‑number low endometrioid endometrial adenocarcinoma". Oncology Letters 10, no. 5 (2015): 2743-2748. https://doi.org/10.3892/ol.2015.3702
Copy and paste a formatted citation
x
Spandidos Publications style
Lin DI: Improved survival associated with somatic PIK3CA mutations in copy‑number low endometrioid endometrial adenocarcinoma. Oncol Lett 10: 2743-2748, 2015.
APA
Lin, D.I. (2015). Improved survival associated with somatic PIK3CA mutations in copy‑number low endometrioid endometrial adenocarcinoma. Oncology Letters, 10, 2743-2748. https://doi.org/10.3892/ol.2015.3702
MLA
Lin, D. I."Improved survival associated with somatic PIK3CA mutations in copy‑number low endometrioid endometrial adenocarcinoma". Oncology Letters 10.5 (2015): 2743-2748.
Chicago
Lin, D. I."Improved survival associated with somatic PIK3CA mutations in copy‑number low endometrioid endometrial adenocarcinoma". Oncology Letters 10, no. 5 (2015): 2743-2748. https://doi.org/10.3892/ol.2015.3702
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