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[Chromosome analysis and FISH method]

M Eguchi¹, K Tanaka

¹Department of Cancer Cytogenetics, Hiroshima University.

Rinsho Byori. the Japanese Journal of Clinical Pathology

|June 1, 1996

Summary

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Fluorescence in situ hybridization (FISH) is a powerful tool for detecting genetic changes in hematologic malignancies. This method aids in diagnosing cancers and monitoring minimal residual disease, improving patient follow-up.

Area of Science:

Hematology
Molecular Biology
Genetics

Context:

Hematologic malignancies arise from genetic alterations like oncogene activation or tumor suppressor gene inactivation.
Cytogenetic analysis is a traditional method for detecting chromosome abnormalities in these cancers for diagnosis and therapy monitoring.
Existing methods like cytogenetics, RT-PCR, and Southern blotting have limitations in detecting genetic changes.

Purpose:

To evaluate the utility of Fluorescence In Situ Hybridization (FISH) in the diagnosis and management of hematologic malignancies.
To explore the application of FISH in identifying genetic changes in both mitotic and interphase cells.
To investigate the combined morphology-FISH method for simultaneous analysis of cell morphology and genetic alterations.

Summary:

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FISH enables the detection of genetic abnormalities in both dividing (mitotic) and non-dividing (interphase) cells, overcoming limitations of traditional methods.
The study utilized FISH for diagnosing hematologic cancers and monitoring minimal residual disease (MRD), offering a rapid and effective approach.
The morphology-FISH technique allowed for concurrent analysis of cellular morphology and genetic changes, while FISH was also used for probe mapping to identify a novel breakpoint cluster region in 11q23.

Impact:

FISH provides a rapid and powerful tool for both clinical diagnosis and basic research in hematologic disorders.
This technique enhances the ability to diagnose hematologic malignancies and monitor treatment effectiveness, particularly for minimal residual disease.
FISH facilitates a deeper understanding of the genetic underpinnings of hematologic cancers, including the identification of novel breakpoint regions.