Genomic Precision

 A SeraCare blog focused on precision medicine and advanced clinical diagnostics

Microsatellite Instability Testing to Predict Immunotherapeutic Response: New Tools to Meet Testing Challenges

Posted by Catherine Huang on Jul 30, 2018 10:00:00 AM

Microsatellites are simple tandem repeats that are present at millions of sites in the human genome.  Microsatellite Instability (MSI) is defined as a change of any length due to either insertion or deletion of repeating units in a microsatellite within a tumor compared with normal tissue.1 The molecular mechanism for the change in repeat length is slippage of nascent DNA strand with respect to the template strand during replication followed by failure to recognize the mismatch due to deficiency in mismatch repair genes.

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Topics: Microsatellite Instability, MMR