MSI OncoKitDx

Background on Microsatellite Instability

Microsatellite instability (MSI) is a form of genomic instability caused by defects in the DNA mismatch repair (MMR) system. This condition leads to the accumulation of insertion and deletion errors in short repetitive DNA sequences, known as microsatellites. MSI is a well-established biomarker in several cancer types, including colorectal, endometrial, and gastric cancers.

The presence of MSI is associated with specific molecular and clinical characteristics, including tumor progression, response to therapy, and prognosis. MSI status is also relevant in research on hereditary cancer syndromes such as Lynch syndrome, where inherited defects in MMR genes result in increased cancer susceptibility.

Accurate detection of MSI is therefore essential for studies on tumor biology, genomic instability, and biomarker-driven therapeutic strategies.

Kit Description

The MSI OncoKitDx™ is designed for the detection of microsatellite instability using conventional PCR followed by capillary electrophoresis. The assay enables simultaneous amplification and analysis of multiple microsatellite markers within a single workflow, allowing efficient and reproducible MSI profiling.

The kit includes a panel of eight markers, providing broad coverage for the assessment of instability across different genomic regions. This multi-marker approach supports reliable classification of MSI status by comparing allelic profiles between samples.

The workflow is compatible with standard fragment analysis platforms and can be integrated into existing molecular laboratory processes.

Workflow and Analysis

The assay is based on PCR amplification of selected microsatellite loci, followed by fragment analysis using capillary electrophoresis. This approach enables precise sizing of amplified fragments and detection of length variations indicative of instability.

Simultaneous analysis of multiple markers allows for robust interpretation of MSI status, reducing the risk of false classification based on single-locus variation. The use of fluorophore-labeled primers supports accurate detection and differentiation of amplified fragments.

A genomic DNA control is included to verify assay performance and ensure reliability of results across different runs and sample types.

Research Applications

MSI analysis is widely used in cancer research to study genomic instability and its role in tumor development. Identification of MSI status supports investigations into mismatch repair deficiency, tumor classification, and molecular subtyping of cancers.

The assay can be applied in studies evaluating correlations between MSI status and treatment response, particularly in the context of immunotherapy. MSI-high tumors have been associated with increased responsiveness to immune checkpoint inhibitors, making MSI an important biomarker in translational research.

In addition, MSI profiling supports research into hereditary cancer syndromes and population genetics, enabling the study of mutation patterns and genetic predisposition.

Summary

The MSI OncoKitDx™ provides a robust solution for the detection of microsatellite instability through PCR-based fragment analysis. Its multi-marker panel, integrated control, and compatibility with standard laboratory workflows enable accurate and reproducible MSI profiling.

Designed for molecular research applications, the kit supports studies on genomic instability, cancer biology, and biomarker development. By enabling reliable MSI detection, the MSI OncoKitDx™ contributes to advancing research in oncology and precision medicine.