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Cited by 168

The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.

Mutant proteins as cancer-specific biomarkers

Open access
Wang, Qing, Chaerkady, Raghothama, Wu, Jian, Hwang, Hee Jung, Papadopoulos, Nick, Kopelovich, Levy, Maitra, Anirban, Matthaei, Hanno, Eshleman, James R., Hruban, Ralph H., Kinzler, Kenneth W., Pandey, Akhilesh, Vogelstein, Bert·2011·Proceedings of the National Academy of Sciences

Abstract

Cancer biomarkers are currently the subject of intense research because of their potential utility for diagnosis, prognosis, and targeted therapy. In theory, the gene products resulting from somatic mutations are the ultimate protein biomarkers, being not simply associated with tumors but actually responsible for tumorigenesis. We show here that the altered protein products resulting from somatic mutations can be identified directly and quantified by mass spectrometry. The peptides expressed from normal and mutant alleles were detected by selected reaction monitoring (SRM) of their product ions using a triple-quadrupole mass spectrometer. As a prototypical example of this approach, we demonstrated that it is possible to quantify the number and fraction of mutant Ras protein present in cancer cell lines. There were an average of 1.3 million molecules of Ras protein per cell, and the ratio of mutant to normal Ras proteins ranged from 0.49 to 5.6. Similarly, we found that mutant Ras proteins could be detected and quantified in clinical specimens such as colorectal and pancreatic tumor tissues as well as in premalignant pancreatic cyst fluids. In addition to answering basic questions about the relative levels of genetically abnormal proteins in tumors, this approach could prove useful for diagnostic applications.

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Metadata

Authors
Wang, Q., Chaerkady, R., Wu, J., Hwang, H. J., Papadopoulos, N., Kopelovich, L., Maitra, A., Matthaei, H., Eshleman, J. R., Hruban, R. H., Kinzler, K. W., Pandey, A., & Vogelstein, B.
Venue
Proceedings of the National Academy of Sciences
Published
2011-01-19
Volume
108
Issue
6
Pages
2444-2449
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W4252395482
Cited by
168
References
11
FWCI
8.21
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Mutant proteins as cancer-specific biomarkers. https://app.cochat.ai/papers/10.1073/pnas.1019203108
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Wang, Q., Chaerkady, R., Wu, J., Hwang, H. J., Papadopoulos, N., Kopelovich, L., Maitra, A., Matthaei, H., Eshleman, J. R., Hruban, R. H., Kinzler, K. W., Pandey, A., & Vogelstein, B. (2011). Mutant proteins as cancer-specific biomarkers. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.1019203108

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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