Age-specific transcriptional response to stroke.
Matthias W Sieber1, Madlen Guenther1, Nadine Jaenisch1
1Hans Berger Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany.
Neurobiology of Aging
|February 18, 2014
Summary
Aging significantly impacts stroke recovery, altering gene expression and increasing susceptibility to post-stroke depression. Understanding these age-related changes is crucial for developing targeted stroke therapies.
Area of Science:
- Neuroscience
- Genomics
- Aging Research
Background:
- Advanced age is a primary risk factor for stroke incidence and mortality.
- Understanding age-related mechanisms post-stroke is vital for developing effective therapeutic interventions.
Purpose of the Study:
- To investigate age-dependent and age-independent gene expression changes following ischemic stroke.
- To identify molecular pathways affected by aging in the context of stroke recovery.
Main Methods:
- Cerebral infarction was induced in mice of four different ages (2, 9, 15, 24 months) using transient middle cerebral artery occlusion.
- Illumina cDNA microarrays and quantitative PCR were employed to analyze gene expression profiles.
Main Results:
- A distinct age-dependent stroke response involving 350 differentially expressed genes was identified.
- 327 differentially expressed genes showed an age-independent response, implicating inflammatory, immune, oxidative stress, and synaptic pathways.
- Aged brains exhibited an attenuated inflammatory response and reduced impairment in synaptic plasticity.
- A significant age-related susceptibility to post-ischemic depression was observed.
Conclusions:
- Aging profoundly influences the molecular response to ischemic stroke.
- Specific gene expression patterns differentiate stroke outcomes based on age.
- Age-related susceptibility to post-ischemic depression is a critical factor impacting functional recovery.
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