Cited by 39PI3K/AKT/mTOR signaling in cancerProtein Kinase Regulation and GTPase SignalingProtein Tyrosine Phosphatases

Single Copies of Mutant KRAS and Mutant PIK3CA Cooperate in Immortalized Human Epithelial Cells to Induce Tumor Formation

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Wang, Grace M., Wong, Hong Yuen, Konishi, Hiroyuki, Blair, Brian G., Abukhdeir, Abde M., Gustin, John P., Rosen, D. Marc, Denmeade, Samuel Ray +16 more·2013·Cancer Research

Published version of a preprint

Abstract

The selective pressures leading to cancers with mutations in both KRAS and PIK3CA are unclear. Here, we show that somatic cell knockin of both KRAS G12V and oncogenic PIK3CA mutations in human breast epithelial cells results in cooperative activation of the phosphoinositide 3-kinase (PI3K) and mitogen-activated protein kinase (MAPK) pathways in vitro, and leads to tumor formation in immunocompromised mice. Xenografts from double-knockin cells retain single copies of mutant KRAS and PIK3CA, suggesting that tumor formation does not require increased copy number of either oncogene, and these results were also observed in human colorectal cancer specimens. Mechanistically, the cooperativity between mutant KRAS and PIK3CA is mediated in part by Ras/p110α binding, as inactivating point mutations within the Ras-binding domain of PIK3CA significantly abates pathway signaling. In addition, Pdk1 activation of the downstream effector p90RSK is also increased by the combined presence of mutant KRAS and PIK3CA. These results provide new insights into mutant KRAS function and its role in carcinogenesis. Cancer Res; 73(11); 3248–61. ©2013 AACR.

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  1. [19]Isakoff SJ Engelman JA Irie HY Breast cancer-associated PIK3CA mutations are oncogenic in mammary epithelial cells Cancer Res 2005 65 10992 1000 16322248

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Authors
Wang, G. M., Wong, H. Y., Konishi, H., Blair, B. G., Abukhdeir, A. M., Gustin, J. P., Rosen, D. M., Denmeade, S. R., Rasheed, Z., Matsui, W., Garay, J. P., Mohseni, M., Higgins, M. J., Cidado, J., Jelovac, D., Croessmann, S., Cochran, R. L., Karnan, S., Konishi, Y., Ota, A., Hosokawa, Y., Argani, P., Lauring, J., & Park, B. H.
Affiliations
Johns Hopkins University (US)
Corresponding author
Park, Ben Ho
Venue
Cancer Research
Published
2013-05-30
Volume
73
Issue
11
Pages
3248-3261
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2145745448
Cited by
39
References
39
Citations by year
2025: 2 · 2023: 1 · 2022: 3 · 2021: 1 · 2019: 7 · 2018: 2 · 2017: 4 · 2016: 5 · 2015: 5 · 2014: 7 · 2013: 2
FWCI
2.83
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Japan Society for the Promotion of Science (25640107, 25460395)
  • National Cancer Institute (CA088843, R01CA150142, F31CA168180, CA109274, R01CA109274, P50CA088843, CA009071, R55CA109274, T32CA009071)
  • National Institute of General Medical Sciences (T32GM007309, T32GM007814, GM007309)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
KRAS G12V, PIK3CA mutation, oncogene cooperation, PI3K signaling, MAPK signaling, breast epithelial cells, colorectal cancer, Ras-binding domain, PDK1, p90RSK, tumor formation, carcinogenesis, xenografts
MeSH terms
Pyruvate Dehydrogenase Acetyl-Transferring Kinase, Animals, Breast Neoplasms, Cell Transformation, Neoplastic, Epithelial Cells, Female, Humans, Mice, Nude, Phosphorylation, Proto-Oncogene Proteins, Biomarkers, Tumor, Proto-Oncogene Proteins p21(ras), Immunocompromised Host, Protein Serine-Threonine Kinases, Point Mutation, ras Proteins, Phosphatidylinositol 3-Kinases, MAP Kinase Signaling System, Ribosomal Protein S6 Kinases, 90-kDa, Ribosomal Protein S6 Kinases, 70-kDa, Cell Growth Processes, Mice, Gene Knock-In Techniques, Class I Phosphatidylinositol 3-Kinases, Heterografts

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