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Published on: September 11, 2017
Gene expression following traumatic brain injury in humans: analysis by microarray
Daniel B Michael1, Donna M Byers, Louis N Irwin
1Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, MI, USA.
Abstract:
Global changes in gene expression were analyzed in pericontusional tissue taken during surgery from 4 patients with traumatic brain injury (TBI), in cerebral infarction tissue from a patient with vasculitis and in normal brain tissue resected during craniotomy for meningioma. Of approximately 1,200 genes showing some level of expression by cDNA microarray hybridization, 104 ( approximately 8%) showed differential expression in traumatized tissue. Genes controlling transcriptional regulation, intermediary and energy metabolism, signal transduction, and intercellular adhesion and recognition were differentially affected most often. Four genes previously shown to be associated with TBI (c-Fos, Jun B, HSP70, and Zif/268) were all found to be up-regulated in at least one TBI patient. Thus, the robust response to TBI of several immediate early genes is confirmed, and a longer list of candidate genes from other functional categories is suggested for further studies aimed at understanding the molecular and cellular consequences of TBI.
Insights
Traumatic brain injury (TBI) significantly alters gene expression, particularly in genes controlling cell communication and metabolism. This study identifies key genes involved in TBI
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Traumatic brain injury (TBI) is a complex condition with significant molecular and cellular consequences.
- Understanding gene expression changes post-TBI is crucial for developing targeted therapies.
Purpose of the Study:
- To identify global gene expression changes in human brain tissue following traumatic brain injury.
- To pinpoint specific genes and functional categories affected by TBI for further investigation.
Main Methods:
- Analysis of gene expression using cDNA microarray hybridization.
- Comparison of gene expression profiles in traumatic brain injury, cerebral infarction, and normal brain tissue.
Main Results:
- Approximately 8% of analyzed genes (104 out of ~1,200) showed differential expression in TBI tissue.
- Genes involved in transcriptional regulation, metabolism, signal transduction, and cell adhesion were most affected.
- Confirmed up-regulation of known TBI-associated genes (c-Fos, Jun B, HSP70, Zif/268) in TBI patients.
Conclusions:
- TBI triggers a robust response involving immediate early genes.
- Identified a broader set of candidate genes for future research into TBI's molecular mechanisms.
