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Prognostic and predictive blood-based biomarkers of overall survival (OS) in patients (pts) with advanced colorectal cancer (CRC) treated with cetuximab (C): Results from CALGB 80203 (Alliance).

Publication ,  Conference
Hatch, AJ; Pang, H; Starr, MD; Brady, JC; Jia, J; Niedzwiecki, D; Venook, AP; Cushman, SM; Hurwitz, H; Nixon, AB
Published in: Journal of Clinical Oncology
January 20, 2014

448 Background: Previously, we identified potential predictive biomarkers of C sensitivity related to EGFR signaling from archived tumor tissue from CALGB 80203. Due to the fact that blood-based markers are more convenient and can be monitored over the course of treatment, baseline plasma samples were also collected and five (EGF, HB-EGF, sEGFR, sHER2, sHER3) of the 14 markers previously analyzed in archived tumor were evaluated in plasma. Methods: CALGB 80203 was a randomized (1:1) phase II trial of 238 pts with locally advanced or metastatic CRC comparing FOLFOX or FOLFIRI (chemo) vs. chemo combined with C. Baseline EDTA plasma samples from 154 pts were analyzed for the 5 candidate markers. The levels of each analyte were correlated with the primary endpoint of OS using univariate Cox proportional hazards models. Potential predictive markers were identified using a treatment by marker interaction term in the Cox model and the markers with significant p-values are reported. Hazard ratios between treatment groups are reported for low or high marker levels dichotomized at the median. Results: Univariate analyses indicated that plasma levels of EGF and sHER3 were negative prognostic markers (p<0.05) that correlated with OS for the overall pt population. Across all pts (KRAS mutant and wild-type), sHER3 was identified as a potential predictive biomarker for C. Pts with higher sHER3 levels had significant OS benefit from C treatment (interaction p=0.03; HR=0.57, 95% CI 0.36-0.92). Low levels of EGF predicted for OS benefit from C in KRAS WT tumors (interaction p<0.01; HR=0.39, 95% CI 0.18-0.87) and lack of benefit in the KRAS mutant pts (interaction p=0.03; HR=3.03, 95% CI 1.13-8.16), but were not predictive for C across all pts combined. Conclusions: Blood-based profiling of EGFR axis members identified sHER3 and EGF as candidate predictors for benefit from C. These data are consistent with our findings using mRNA expression from archived tumor samples and suggest a role for receptor shedding in HER3 biology. If further validated, these markers may help guide the development and use of anti-EGFR therapies and combination regimens.

Duke Scholars

Published In

Journal of Clinical Oncology

DOI

EISSN

1527-7755

ISSN

0732-183X

Publication Date

January 20, 2014

Volume

32

Issue

3_suppl

Start / End Page

448 / 448

Publisher

American Society of Clinical Oncology (ASCO)

Related Subject Headings

  • Oncology & Carcinogenesis
  • 3211 Oncology and carcinogenesis
  • 1112 Oncology and Carcinogenesis
  • 1103 Clinical Sciences
 

Citation

APA
Chicago
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MLA
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Hatch, A. J., Pang, H., Starr, M. D., Brady, J. C., Jia, J., Niedzwiecki, D., … Nixon, A. B. (2014). Prognostic and predictive blood-based biomarkers of overall survival (OS) in patients (pts) with advanced colorectal cancer (CRC) treated with cetuximab (C): Results from CALGB 80203 (Alliance). In Journal of Clinical Oncology (Vol. 32, pp. 448–448). American Society of Clinical Oncology (ASCO). https://doi.org/10.1200/jco.2014.32.3_suppl.448
Hatch, Ace J., Herbert Pang, Mark D. Starr, John C. Brady, Jingquan Jia, Donna Niedzwiecki, Alan Paul Venook, Stephanie M. Cushman, Herbert Hurwitz, and Andrew B. Nixon. “Prognostic and predictive blood-based biomarkers of overall survival (OS) in patients (pts) with advanced colorectal cancer (CRC) treated with cetuximab (C): Results from CALGB 80203 (Alliance).” In Journal of Clinical Oncology, 32:448–448. American Society of Clinical Oncology (ASCO), 2014. https://doi.org/10.1200/jco.2014.32.3_suppl.448.
Hatch AJ, Pang H, Starr MD, Brady JC, Jia J, Niedzwiecki D, et al. Prognostic and predictive blood-based biomarkers of overall survival (OS) in patients (pts) with advanced colorectal cancer (CRC) treated with cetuximab (C): Results from CALGB 80203 (Alliance). In: Journal of Clinical Oncology. American Society of Clinical Oncology (ASCO); 2014. p. 448–448.
Hatch, Ace J., et al. “Prognostic and predictive blood-based biomarkers of overall survival (OS) in patients (pts) with advanced colorectal cancer (CRC) treated with cetuximab (C): Results from CALGB 80203 (Alliance).Journal of Clinical Oncology, vol. 32, no. 3_suppl, American Society of Clinical Oncology (ASCO), 2014, pp. 448–448. Crossref, doi:10.1200/jco.2014.32.3_suppl.448.
Hatch AJ, Pang H, Starr MD, Brady JC, Jia J, Niedzwiecki D, Venook AP, Cushman SM, Hurwitz H, Nixon AB. Prognostic and predictive blood-based biomarkers of overall survival (OS) in patients (pts) with advanced colorectal cancer (CRC) treated with cetuximab (C): Results from CALGB 80203 (Alliance). Journal of Clinical Oncology. American Society of Clinical Oncology (ASCO); 2014. p. 448–448.

Published In

Journal of Clinical Oncology

DOI

EISSN

1527-7755

ISSN

0732-183X

Publication Date

January 20, 2014

Volume

32

Issue

3_suppl

Start / End Page

448 / 448

Publisher

American Society of Clinical Oncology (ASCO)

Related Subject Headings

  • Oncology & Carcinogenesis
  • 3211 Oncology and carcinogenesis
  • 1112 Oncology and Carcinogenesis
  • 1103 Clinical Sciences