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Published on: November 8, 2019
Expression microarray identifies novel markers of free flap failure in a rat model
Suhail K Mithani1, Rachel Bluebond-Langner, Eduardo D Rodriguez
1R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine and Johns Hopkins Medical Institutions, Baltimore, MD 21201, USA.
Annals of Plastic Surgery
|August 21, 2009
Summary
This study identified novel gene expression biomarkers for early detection of free flap failure in an animal model. These findings could improve clinical sensitivity for predicting flap complications.
Area of Science:
- Biomedical Engineering
- Genomics
- Surgical Research
Background:
- Clinical detection of free flap failure has low sensitivity.
- Genomic approaches for identifying biomarkers and therapeutic targets in flap failure are lacking.
Purpose of the Study:
- To identify gene expression alterations associated with free flap failure using a microarray approach.
- To discover potential biomarkers for early detection of flap failure.
Main Methods:
- Utilized a rat free tissue transfer model with venous occlusion to induce flap failure.
- Assessed global gene expression using microarray analysis.
- Validated key gene expression changes with quantitative reverse transcription polymerase chain reaction.
Main Results:
- Identified 890 genes with >2-fold expression differences and 53 statistically significant genes.
- Discovered 4 genes (RT1 class II, locus Bb, secreted frizzled-related protein 1, platelet/endothelial cell adhesion molecule, Claudin 5) potentially involved in flap failure.
- Validated significant alterations in locus Bb, platelet/endothelial cell adhesion molecule, and Claudin 5.
- Achieved 100% sensitivity and 86% specificity in predicting venous occlusion using expression thresholds.
Conclusions:
- Identified three novel, highly sensitive, and specific genes (locus Bb, platelet/endothelial cell adhesion molecule, Claudin 5) predictive of flap failure.
- Demonstrated the potential of gene expression analysis for early flap failure detection.
- These biomarkers could enhance clinical monitoring and management of free flaps.
