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Marques A, Cavaco P, Torre C, Sepodes B, Rocha J. Tumor mutational burden in colorectal cancer: Implications for treatment. Crit Rev Oncol Hematol 2024; 197:104342. [PMID: 38614266 DOI: 10.1016/j.critrevonc.2024.104342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/27/2024] [Accepted: 03/29/2024] [Indexed: 04/15/2024] Open
Abstract
Although immune checkpoint inhibitors have revolutionized the treatment of several advanced solid cancers, in colorectal cancer, the transformative benefit of these innovative medicines is currently limited to those with deficient mismatch repair or high microsatellite instability. Tumor mutational burden (TMB) has emerged as a potential predictor of immunotherapy benefit, but the lack of standardization in its assessment and reporting has hindered the introduction of this biomarker in routine clinical practice. Here, we compiled 45 colorectal cancer studies utilizing numerical thresholds for high-TMB. In this group of studies, TMB cut-offs ranged from 6.88 to 41 mut/Mb and were most often set at 10, 17, or 20 mut/Mb. Additionally, we observed divergent TMB definitions and inconsistent disclosure of specific methodological details, which collectively emphasize the substantial lack of harmonization within the field. Ongoing efforts to harmonize TMB assessment will be critical to validate TMB as a predictive marker of immunotherapy response.
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Affiliation(s)
- Adriana Marques
- Research Institute for Medicines (iMed.ULisboa), Lisboa 1649-003, Portugal; Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
| | - Patrícia Cavaco
- Research Institute for Medicines (iMed.ULisboa), Lisboa 1649-003, Portugal; Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal; Pharmacy Department, Centro Hospitalar de Lisboa Ocidental, Lisboa 1449-005, Portugal
| | - Carla Torre
- Research Institute for Medicines (iMed.ULisboa), Lisboa 1649-003, Portugal; Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
| | - Bruno Sepodes
- Research Institute for Medicines (iMed.ULisboa), Lisboa 1649-003, Portugal; Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
| | - João Rocha
- Research Institute for Medicines (iMed.ULisboa), Lisboa 1649-003, Portugal; Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal.
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Zwart K, van der Baan FH, Punt CJA, Wensink GE, Bolhuis K, Laclé MM, van Grevenstein WMU, Hagendoorn J, de Hingh IH, Koopman M, Vink G, Roodhart J. Survival of Patients with Deficient Mismatch Repair Versus Proficient Mismatch Repair Metastatic Colorectal Cancer Receiving Curative-Intent Local Treatment of Metastases in a Nationwide Cohort. Ann Surg Oncol 2023; 30:6762-6770. [PMID: 37528303 PMCID: PMC10506947 DOI: 10.1245/s10434-023-13974-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 07/03/2023] [Indexed: 08/03/2023]
Abstract
BACKGROUND It is unclear whether curative-intent local therapy of metastases is of similar benefit for the biological distinct subgroup of patients with deficient mismatch repair (dMMR) metastatic colorectal cancer (mCRC) compared with proficient mismatch repair (pMMR) mCRC. PATIENTS AND METHODS In this nationwide study, recurrence-free (RFS) and overall survival (OS) were analyzed in patients with dMMR versus pMMR mCRC who underwent curative-intent local treatment of metastases between 2015 and 2018. Subgroup analyses were performed for resection of colorectal liver metastases (CRLM) and cytoreductive surgery ± hyperthermic intraperitoneal chemotherapy (CRS ± HIPEC). Multivariable regression was conducted. RESULTS Median RFS was 11.1 months [95% confidence interval (CI) 8.5-41.1 months] for patients with dMMR tumors compared with 8.9 months (95% CI 8.1-9.8 months) for pMMR tumors. Two-year RFS was higher in patients with dMMR versus pMMR (43% vs. 21%). Results were similar within subgroups of local treatment (CRLM and CRS ± HIPEC). Characteristics differed significantly between patients with dMMR and pMMR mCRC; however, multivariable analysis continued to demonstrate dMMR as independent factor for improved RFS [hazard ratio (HR): 0.57, 95% CI 0.38-0.87]. Median OS was 33.3 months for dMMR mCRC compared with 43.5 months for pMMR mCRC, mainly due to poor survival of patients with dMMR in cases of recurrence in the preimmunotherapy era. CONCLUSION Patients with dMMR eligible for curative-intent local treatment of metastases showed a comparable to more favorable RFS compared with patients with pMMR, with a clinically relevant proportion of patients remaining free of recurrence. This supports local treatment as a valuable treatment option in patients with dMMR mCRC and can aid in shared decision-making regarding upfront local therapy versus immunotherapy.
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Affiliation(s)
- Koen Zwart
- Department of Medical Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Frederieke H van der Baan
- Department of Medical Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Cornelis J A Punt
- Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
| | - G Emerens Wensink
- Department of Medical Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Karen Bolhuis
- Department of Medical Oncology, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, The Netherlands
- Department of Medical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Miangela M Laclé
- Department of Pathology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | | | - Jeroen Hagendoorn
- Department of Surgery, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Ignace H de Hingh
- Department of Surgery, Catharina Hospital, Eindhoven, The Netherlands
- Department of Research and Development, Netherlands Comprehensive Cancer Organisation (IKNL), Utrecht, The Netherlands
| | - Miriam Koopman
- Department of Medical Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Geraldine Vink
- Department of Medical Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Department of Research and Development, Netherlands Comprehensive Cancer Organisation (IKNL), Utrecht, The Netherlands
| | - Jeanine Roodhart
- Department of Medical Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.
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Klemen ND, D'Angelica MI. ASO Author Reflections: How Immunotherapy Could Change the Management of Responsive Solid Tumors. Ann Surg Oncol 2022; 29:8383-8384. [PMID: 35927596 PMCID: PMC9649850 DOI: 10.1245/s10434-022-12167-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 06/25/2022] [Indexed: 11/18/2022]
Affiliation(s)
- Nicholas D Klemen
- Department of Surgery, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Michael I D'Angelica
- Department of Surgery, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA.
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