What question did this study set out to answer?

To examine the roles and mechanisms of spinal cord A1 and A2 reactive astrocytes mediated by microglia and the CXCR7/PI3K/Akt pathway in chronic post-surgical pain.

July 14, 2020Journal of NeuroinflammationOpen Access

Microglia induce the transformation of A1/A2 reactive astrocytes via the CXCR7/PI3K/Akt pathway in chronic post-surgical pain

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Authors

TLTing LiGuangzhou University of Chinese Medicine TLTongtong LiuShandong University XCXuhui ChenZhejiang Chinese Medical University

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Implication

Animal study demonstrates microglial regulation of spinal astrocyte phenotypes via CXCR7/PI3K/Akt in rats, indicating that shifting A1 to A2 astrocytes relieves chronic post-surgical pain.

Key Points

To examine the roles and mechanisms of spinal cord A1 and A2 reactive astrocytes mediated by microglia and the CXCR7/PI3K/Akt pathway in chronic post-surgical pain.
Modeled chronic post-surgical pain in rats using a skin/muscle incision and retraction (SMIR) protocol.
Administered intrathecal injections of minocycline (microglial inhibitor), AMD3100 (CXCR7 agonist), or LY294002 (PI3K inhibitor) to manipulate neuroinflammatory signaling.
Assessed mechanical allodynia using von Frey filaments and evaluated microglial markers, astrocyte phenotypes, CXCR7, and PI3K/Akt pathway proteins using ELISA, western blot, and immunofluorescence.
SMIR surgery caused early spinal microglial activation marked by elevated IL-1α, TNFα, and C1q, followed by astrocyte activation dominated by the A1 phenotype at day 14.
Downregulation of CXCR7 and PI3K/Akt signaling occurred after SMIR, but treatment with minocycline or AMD3100 restored pathway activity, reverted the A1/A2 astrocyte ratio, and alleviated mechanical allodynia.
Inhibition of PI3K with LY294002 reversed the analgesic effects and A1/A2 astrocyte phenotypic transformation achieved by minocycline and AMD3100.

Cite This Study

Li et al. (2020) studied this question.

synapsesocial.com/papers/6a710577febe604dd709c13f https://doi.org/10.1186/s12974-020-01891-5

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Implication

Animal study demonstrates microglial regulation of spinal astrocyte phenotypes via CXCR7/PI3K/Akt in rats, indicating that shifting A1 to A2 astrocytes relieves chronic post-surgical pain.

Microglia induce the transformation of A1/A2 reactive astrocytes via the CXCR7/PI3K/Akt pathway in chronic post-surgical pain

Discussion

Member takes

Implication

Key Points

Cite This Study

Microglia induce the transformation of A1/A2 reactive astrocytes via the CXCR7/PI3K/Akt pathway in chronic post-surgical pain

Discussion

Member takes

Implication

Key Points

Cite This Study

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