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Updated: May 14, 2026
08:46
Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
Published on: December 9, 2015
[Lynch syndrome and microsatellite instability: a review]
F Desselle1, G Verset, M Polus
1Service de Gastroentérologie et d'Oncologie digestive, CHU de Liège, Belgique.
Revue Medicale De Liege
|January 25, 2013
Summary
Microsatellite instability (MSI) in colorectal cancer (CRC) indicates a better prognosis but may impact adjuvant therapy effectiveness. MSI CRC shows a stronger immune response, yet 5-FU therapy may be less beneficial in stage II.
Area of Science:
- Oncology
- Genetics
- Cancer Biology
Context:
- Microsatellite instability (MSI) is observed in 15-24% of colorectal cancer (CRC) cases, arising sporadically or hereditarily.
- MSI signifies a deficient mismatch repair system, a hallmark of Lynch syndrome and some sporadic CRCs.
- MSI CRC exhibits a distinct biological profile, including enhanced anti-tumor immunity and increased apoptosis.
Purpose:
- To elucidate the prognostic and therapeutic implications of MSI in colorectal cancer.
- To differentiate the clinical behavior of MSI versus microsatellite stable (MSS) colorectal tumors.
- To review the impact of MSI on adjuvant chemotherapy efficacy in different CRC stages.
Summary:
- Colorectal cancers with MSI generally have a better prognosis than MSS tumors.
- This improved outlook is attributed to heightened anti-tumor immune responses and tumor cell apoptosis.
- However, MSI status may influence the efficacy of specific adjuvant therapies, particularly 5-FU in stage II CRC.
Impact:
- Understanding MSI's role is crucial for personalized treatment strategies in colorectal cancer.
- MSI status may guide decisions regarding adjuvant chemotherapy, potentially altering treatment benefit.
- Further research is needed to optimize therapeutic approaches for MSI-positive CRC patients.
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