TREM2 protects against cerebral ischemia/reperfusion injury

Rong Wu, Xiangpen Li, Pengfei Xu, Likui Huang, Jinping Cheng, Xiaolong Huang, Jingru Jiang, Long-Jun Wu, Yamei Tang

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Although post-ischemic inflammation induced by the innate immune response is considered an essential step in the progression of cerebral ischemia injury, the role of triggering receptor expressed on myeloid cells 2 (TREM2) in the pathogenesis of ischemic stroke remains to be elucidated. Here, we found that the transcriptional and post-transcriptional levels of TREM2 were increased in cultured primary microglia after oxygen-glucose deprivation and reoxygenation and in the ischemic penumbra of the cerebral cortex after middle cerebral artery occlusion (MCAO) and reperfusion in mice. TREM2 was mainly expressed in microglia, but not in astrocytes, neurons, or oligodendrocytes in mice subjected to MCAO. Manipulating TREM2 expression levels in vitro and in vivo significantly regulated the production of pro- and anti-inflammatory mediators after ischemic stroke. TREM2 overexpression markedly suppressed the inflammatory response and neuronal apoptosis. By contrast, TREM2 gene silencing intensified the inflammatory response, increased neuronal apoptosis and infarct volume, and further exacerbated neurological dysfunction. Our study demonstrated that TREM2 protects against cerebral ischemia/reperfusion injury through the aspect of post-ischemic inflammatory response and neuronal apoptosis. Pharmacological targeting of TREM2 to suppress the inflammatory response may provide a new approach for developing therapeutic strategies in the treatment of ischemic stroke and other cerebrovascular diseases.

Original languageEnglish (US)
Article number20
JournalMolecular brain
Volume10
Issue number1
DOIs
StatePublished - Jun 7 2017

Fingerprint

Myeloid Cells
Reperfusion Injury
Brain Ischemia
Middle Cerebral Artery Infarction
Stroke
Microglia
Apoptosis
Cerebrovascular Disorders
Oligodendroglia
Gene Silencing
Innate Immunity
Astrocytes
Cerebral Cortex
Reperfusion
Anti-Inflammatory Agents
Pharmacology
Oxygen
Inflammation
Neurons
Glucose

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cellular and Molecular Neuroscience

Keywords

  • Inflammation
  • Ischemia/Reperfusion injury
  • Microglia
  • TREM2

Cite this

Wu, R., Li, X., Xu, P., Huang, L., Cheng, J., Huang, X., ... Tang, Y. (2017). TREM2 protects against cerebral ischemia/reperfusion injury. Molecular brain, 10(1), [20]. https://doi.org/10.1186/s13041-017-0296-9
Wu, Rong ; Li, Xiangpen ; Xu, Pengfei ; Huang, Likui ; Cheng, Jinping ; Huang, Xiaolong ; Jiang, Jingru ; Wu, Long-Jun ; Tang, Yamei. / TREM2 protects against cerebral ischemia/reperfusion injury. In: Molecular brain. 2017 ; Vol. 10, No. 1.
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Wu, R, Li, X, Xu, P, Huang, L, Cheng, J, Huang, X, Jiang, J, Wu, L-J & Tang, Y 2017, 'TREM2 protects against cerebral ischemia/reperfusion injury', Molecular brain, vol. 10, no. 1, 20. https://doi.org/10.1186/s13041-017-0296-9

TREM2 protects against cerebral ischemia/reperfusion injury. / Wu, Rong; Li, Xiangpen; Xu, Pengfei; Huang, Likui; Cheng, Jinping; Huang, Xiaolong; Jiang, Jingru; Wu, Long-Jun; Tang, Yamei.

In: Molecular brain, Vol. 10, No. 1, 20, 07.06.2017.

Research output: Contribution to journalArticle

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T1 - TREM2 protects against cerebral ischemia/reperfusion injury

AU - Wu, Rong

AU - Li, Xiangpen

AU - Xu, Pengfei

AU - Huang, Likui

AU - Cheng, Jinping

AU - Huang, Xiaolong

AU - Jiang, Jingru

AU - Wu, Long-Jun

AU - Tang, Yamei

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Wu R, Li X, Xu P, Huang L, Cheng J, Huang X et al. TREM2 protects against cerebral ischemia/reperfusion injury. Molecular brain. 2017 Jun 7;10(1). 20. https://doi.org/10.1186/s13041-017-0296-9