Abstract
Background
For patients undergoing resection of colorectal liver metastases (CLMs), the prognostic role of somatic gene alterations is increasingly recognized. F-box/WD repeat–containing protein 7 (FBXW7) is a tumor suppressor gene found in approximately 10% of patients with colorectal cancer. The aim of this study is to assess the association of FBXW7 with overall survival after CLM resection.
Methods
Patients who underwent initial CLM resection during 2001–2016 and had genetic sequencing data were studied. Risk factors for overall survival (OS) were evaluated with Cox proportional hazards models using backward elimination.
Results
Of 2045 patients who underwent CLM resection during the study period, 476 were included. The majority (90.5%) underwent prehepatectomy chemotherapy. A total of 27 patients (5.7%) had FBXW7 alteration, along with 240 (50.4%) RAS, 337 (70.8%) TP53, 51 (10.7%) SMAD4, and 27 (5.7%) BRAF. Cox proportional hazards model analyses including 5 somatic gene alteration status and 12 clinicopathologic factors revealed FBXW7(hazard ratio [HR] 1.99, P = 0.015), BRAF (HR 2.47, P = 0.023), RAS (HR 2.42, P < 0.001), TP53 (HR 2.00, P < 0.001), and SMAD4 alterations (HR 1.90, P = 0.004) as significantly associated with OS, together with three clinicopathologic factors, prehepatectomy chemotherapy > 6 cycles (HR 1.51, P = 0.021), number of CLM (HR 1.05, P = 0.007), and largest liver metastasis diameter (HR 1.07, P = 0.023). The covariate-adjusted 5-year OS was significantly lower in patients with FBXW7 alteration than in patients with FBXW7 wild-type (40.4% vs.59.4%, P = 0.015).
Conclusions
FBXW7 alterations are associated with worse survival after CLM resection. The information on multiple somatic gene alterations is imperative for risk stratification and patient selection for CLM resection.
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Abbreviations
- CLM:
-
colorectal liver metastases
- FBXW7 :
-
F-box/WD repeat–containing protein 7
- OS:
-
overall survival
- HR:
-
hazard ratio
- CI:
-
confidence intervals
- VEGF:
-
vascular endothelial growth factor
- EGFR:
-
epidermal growth factor receptor
- MAPK:
-
mitogen-activated protein kinase
- TGF-β:
-
transforming growth factor-β
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Acknowledgements
The authors thank Ms. Ruth Haynes for the administrative support in the preparation of this manuscript.
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Substantial contributions to:
The conception or design of the work: YK, TN, JNV
The acquisition, analysis, or interpretation of data for the work: YK, TN, HT, CWT, YSH, TA, SK, JNV
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Funding
This research was supported in part by the National Institutes of Health through MD Anderson Cancer Center Support Grant, CA016672.
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Previous communication to a society or meeting: This study was presented on June 3, 2020 in the Society for Surgery of the Alimentary Tract Wednesday Webinars due to the cancellation of the 61th Annual Meeting of the Society for Surgery of the Alimentary Tract Plenary Session.
Supplementary Information
Supplementary Figure 1
Patient selection. *In patients who completed 2-stage hepatectomy, only the second-stage hepatectomy was included. The first-stage hepatectomy was excluded not to include patients twice in our analysis. (DOCX 357 kb)
Supplementary Figure 2
Overall survival (OS) by TP53 and FBXW7 alteration status. (A) OS curves. (B) OS curves after adjustment for somatic gene alteration status (BRAF, RAS, and SMAD4), prehepatectomy chemotherapy (> 6 cycles vs. ≤ 6 cycles or no prehepatectomy chemotherapy), number of CLM, and largest liver metastasis diameter. (DOCX 380 kb)
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Kawaguchi, Y., Newhook, T.E., Tran Cao, H.S. et al. Alteration of FBXW7 is Associated with Worse Survival in Patients Undergoing Resection of Colorectal Liver Metastases. J Gastrointest Surg 25, 186–194 (2021). https://doi.org/10.1007/s11605-020-04866-2
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DOI: https://doi.org/10.1007/s11605-020-04866-2