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β2SP/TET2 complex regulates gene 5hmC modification after cerebral ischemia
Xiaohua Ma1, Meng Zhang1, Rui Yan1
1Institute of Neuroscience, Soochow University, Suzhou City, China.
Journal of Cellular and Molecular Medicine
|November 20, 2021
Summary
Beta-II spectrin (β2SP) levels increase after ischemic injury and interact with TET2, impacting 5-hydroxymethylcytosine (5hmC) levels. This suggests β2SP is a potential therapeutic target for ischemic stroke.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Beta-II spectrin (β2SP) is crucial for myelin sheath formation and cellular functions.
- Demyelination is a key feature and mechanism of injury in cerebral ischemia.
- Understanding molecular mechanisms in ischemic stroke is vital for developing treatments.
Purpose of the Study:
- To investigate the role of β2SP in cerebral ischemia.
- To explore the interaction between β2SP and TET2 following ischemic injury.
- To determine the effect of β2SP on 5-hydroxymethylcytosine (5hmC) levels and related pathways.
Main Methods:
- Oxygen and glucose deprivation (OGD) model to simulate ischemic conditions.
- β2SP knockout (KO) and TET2 knockout (KO) mouse models.
- Western blotting to assess protein levels.
- 5hmC sequencing to analyze hydroxymethylation patterns.
Main Results:
- β2SP levels increased after ischemic injury and interacted with TET2.
- β2SP knockout led to decreased nuclear TET2 and reduced 5hmC levels post-OGD.
- β2SP influenced 5hmC levels, with affected regions linked to calcium, cGMP-PKG, Wnt, and Hippo signaling pathways.
Conclusions:
- β2SP regulates gene 5hmC by interacting with TET2.
- β2SP plays a significant role in the molecular mechanisms of ischemic stroke.
- β2SP emerges as a potential therapeutic target for treating ischemic stroke.
