Cited by 406Protein Kinase Regulation and GTPase SignalingCancer Mechanisms and TherapyMechanisms of cancer metastasis

Increase in activity and level of pp60c-src in progressive stages of human colorectal cancer.

Open access
Talamonti, M S, Roh, M S, Curley, S A, Gallick, G E·1993·Journal of Clinical Investigation

Abstract

Activation of the tyrosine kinase of the c-src gene product, pp60c-src, has been shown to occur in nearly every primary colorectal carcinoma, and is found as early as in polyps of high malignant potential. However, no studies have addressed potential pp60c-src changes which occur during progression. To examine this question, we have studied kinase activity and protein levels in 7 colonic polyps, 19 primary lesions, and 19 liver metastases relative to normal colonic mucosa. Significant increases in tyrosine kinase activity were seen as early as in colonic polyps of high malignant potential. Further increases were observed in activity and level in primary tumors. However, the greatest increases in activity and protein levels were observed in liver metastases. Additionally, six metastatic lesions were obtained in which synchronous primary tumor was resected. In each of these liver metastases, pp60c-src activity and level were significantly increased relative to the corresponding primary tumor, as well as to normal colonic mucosa. Our results demonstrate that progression of colon primary tumors to liver metastases correlates with increased pp60c-src kinase activity and protein level.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1172/jci116200

Cites

45 of 45 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The SRC activation signature score was significantly associated with metastasis and primary tumor stage I-IV progression.

    “Moreover, the SRC activation signature score was significantly associated with metastasis and primary tumor stage I-IV progression (Fig. 2g,h), in agreement with previous studies in CRC [37–40].”

    From An integrative gene expression signature analysis identifies CMS4 KRAS-mutated colorectal cancers sensitive to combined MEK and SRC targeted therapy (2022) · cites this paper as [40]

    The Results report higher pp60c-src activity and protein levels in liver metastases, supporting the metastasis part of the claimed agreement. But the same section says there were no significant differences in primary-tumor activity by Dukes’ stage, so this paper does not support an association with primary-tumor stage I–IV progression. It measured pp60c-src activity and levels, not the citing paper’s signature score. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Colon cancer progression may be dependent on increased Src family kinase protein level and subsequent activity.

    “Talamonti et al reported increased activity and expression of SFKs in progressive stages of human colorectal cancer, suggesting that colon cancer progression may be dependent on increased SFK protein level and subsequent activity (Talamonti et al., 1993).”

    From Dasatinib sensitizes KRAS mutant colorectal tumors to cetuximab (2011) · cites this paper as Talamonti et al., 1993

    The Results report increasing pp60c-src protein levels and kinase activity across progressive stages of colorectal cancer, and the Discussion suggests elevated activity may contribute to metastatic progression (pages not supplied). But the study examines c-src specifically, not Src-family kinases as a group; it also says the increased activity cannot be explained solely by increased protein level and does not establish that one subsequently causes the other. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • SRC expression and activity are higher in primary colon tumors than in benign polyps or non-transformed colonic mucosa, and SRC activity increases in progressive stages of colorectal cancer.

    “Higher expression and activity of SRC has been documented in primary colon tumors compared with benign polyps or non-transformed colonic mucosa, and increased activity is observed in progressive stages of CRC [23–26].”
  • c-Src expression and activity increase in CRC liver metastases compared with metastases derived from other tumor types.

    “However, c-Src seems to experience a robust increase in expression and activity in CRC liver metastases compared with metastases derived from other tumors types [11, 12]”
  • c-src expression and activity are robustly increased in CRC liver metastases compared to metastases from other tumor types.

    “C-src, though, seems to have a robust increase regarding expression and activity in CRC liver metastases compared to those derived from other tumors types.3,11,13”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Talamonti, M. S., Roh, M. S., Curley, S. A., & Gallick, G. E.
Affiliations
The University of Texas MD Anderson Cancer Center (US)
Venue
Journal of Clinical Investigation
Published
1993-01-01
Volume
91
Issue
1
Pages
53-60
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2030565228
Cited by
399
References
45
Citations by year
2026: 1 · 2025: 3 · 2024: 4 · 2023: 11 · 2022: 6 · 2021: 6 · 2020: 6 · 2019: 6 · 2018: 6 · 2017: 14 · 2016: 8 · 2015: 13 · 2014: 11 · 2013: 17 · 2012: 24
FWCI
2.45
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01ca053167-06)
  • National Cancer Institute (CA09599, CA53167, T32CA009599)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cancer Mechanisms and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mechanisms of cancer metastasis
Keywords
Src kinase, tyrosine kinase activity, colorectal cancer, tumor progression, colonic polyps, liver metastasis, synchronous primary tumors, oncogene activation
MeSH terms
Adenocarcinoma, Adenoma, Antigen-Antibody Complex, Colonic Neoplasms, Colonic Polyps, Humans, Intestinal Mucosa, Liver Neoplasms, Neoplasm Metastasis, Neoplasm Staging, Phosphopyruvate Hydratase, Phosphorylation, Protein Kinases, Protein-Tyrosine Kinases, Rectal Neoplasms, Reference Values, Immunoblotting, Proto-Oncogene Proteins pp60(c-src)

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review