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Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
Comparative genomic hybridization arrays in clinical pathology: progress and challenges
Shelly R Gunn1, Ryan S Robetorye, Mansoor S Mohammed
1Department of Pathology, University of Texas Health Science Center, San Antonio, Texas 78229-3900, USA. gunn@uthscsa.edu
Molecular Diagnosis & Therapy
|April 3, 2007
Summary
Array-based comparative genomic hybridization (array CGH) detects genetic material gains and losses for diagnosing disorders. It guides further characterization of genomic rearrangements using FISH or G-banding for comprehensive patient analysis.
Area of Science:
- Genomics
- Clinical Diagnostics
- Cytogenetics
Background:
- Array CGH offers whole-genome scanning for genetic material alterations in congenital and neoplastic disorders.
- It integrates cytogenetics and FISH capabilities for detecting cryptic chromosomal abnormalities.
- Structural variants and lack of morphologic detail limit array CGH's standalone diagnostic power.
Purpose of the Study:
- To propose array CGH as a guide for identifying genomic structural rearrangements.
- To emphasize the need for complementary FISH or G-banding for detailed characterization.
- To discuss experiences, progress, and challenges in integrating array CGH into clinical diagnostics.
Main Methods:
- Utilizing array CGH for genome-wide detection of copy number variations.
- Employing FISH and G-banding for detailed characterization of structural variants.
- Clinical case analysis and review of diagnostic experiences.
Main Results:
- Array CGH effectively identifies gains and losses of genetic material.
- Structural variants can complicate array CGH analysis.
- Further characterization by FISH or G-banding is crucial for anomalies with diagnostic and prognostic implications.
Conclusions:
- Array CGH is a valuable tool for initial genome scanning in diagnostics.
- It should be used in conjunction with FISH or G-banding for comprehensive analysis of structural rearrangements.
- Integration of array CGH into clinical laboratory medicine requires addressing current challenges.
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