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Cardiac genomic response following preconditioning stimulus.
Dipak K Das1, Nilanjana Maulik
1Cardiovascular Research Center, University of Connecticut School of Medicine, Farmington, Connecticut, CT 06030-1110, USA. DDAS@NEURON.UCHC.EDU
Cardiovascular Research
|March 29, 2006
Summary
Preconditioning stimuli reprogram gene expression, triggering protective proteins like antioxidants and heat shock proteins. This genomic response, common across various stresses, promotes cell survival signaling.
Area of Science:
- Molecular Biology
- Genomics
- Cellular Stress Response
Background:
- Ischemic preconditioning involves cycles of ischemia and reperfusion, leading to gene expression changes.
- A 'second window of protection' involves protein synthesis from preconditioned genes.
Purpose of the Study:
- To review the genomic response to various preconditioning stimuli.
- To identify common genes and signaling pathways involved in stress preconditioning.
Main Methods:
- Review of existing literature on gene expression profiling after preconditioning.
- Analysis of gene array data and differential display techniques.
Main Results:
- Diverse preconditioning stimuli (ischemic, hypoxic, heat shock, oxidative stress) induce similar gene expression profiles.
- Key induced genes include antioxidants (superoxide dismutase, glutathione peroxidase, heme oxygenase) and heat shock proteins (HSP70).
- Mitochondrial genes and ATPases are also identified as stress-responsive.
Conclusions:
- Oxidative stress acts as a central mediator in the response to various preconditioning stimuli.
- Redox signaling converts 'death signals' to 'survival signals' during preconditioning, enhancing cell resilience.