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Updated: Dec 30, 2025

Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
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Microsatellite instability: a review of what the oncologist should know

Kai Li1,2,3, Haiqing Luo3, Lianfang Huang1,2

  • 11Guangdong Key Laboratory for Research and Development of Natural Drugs, Guangdong Medical University, Zhanjiang, 524023 China.

Cancer Cell International
|January 21, 2020
PubMed

Insights

High microsatellite instability (MSI-H) or mismatch repair deficient (dMMR) tumors show promise with immunotherapy. However, MSI tumor heterogeneity impacts treatment response, necessitating further research into detection and mechanisms.

Area of Science:

  • Oncology
  • Genetics
  • Immunotherapy

Background:

  • High microsatellite instability (MSI-H) and mismatch repair deficiency (dMMR) are biomarkers indicating potential benefit from immunotherapy.
  • MSI serves as an index for detecting genetic instability in tumors.
  • Heterogeneity exists among MSI tumors regarding immunotherapy response, prognosis, and chemotherapy sensitivity.

Purpose of the Study:

  • To review current research on MSI detection methods.
  • To explore the mechanisms underlying MSI occurrence.
  • To analyze the relationship between MSI and various tumors.

Main Methods:

  • Literature review of MSI detection techniques.
  • Analysis of studies on MSI mechanisms.
  • Examination of research linking MSI to tumor types.

Main Results:

  • MSI detection methods vary, impacting diagnostic accuracy.
  • Understanding MSI mechanisms is crucial for predicting treatment outcomes.
  • MSI status influences tumor behavior and response to therapies.

Conclusions:

  • Further research is needed to address MSI tumor heterogeneity.
  • Standardized MSI detection and mechanistic insights are vital.
  • This review provides a reference for future MSI-related cancer research.
Keywords:
CancerMSIMSI-H/dMMRMicrosatellite DNA

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