What question did this study set out to answer?

To determine how Aβ42 activates the TRPM2 ion channel in microglia and evaluate its contribution to microglial activation and neurotoxic TNF-α release in Alzheimer's disease models.

November 16, 2017Glia

A critical role of TRPM2 channel in Aβ42‐induced microglial activation and generation of tumor necrosis factor‐α

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Authors

SMSharifah Alawieyah Syed MortadzaUniversiti Putra Malaysia JSJoan A. SimUniversity of Manchester VNVeronika E. NeubrandUniversidad de Granada

Discussion

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Implication

Experimental study reveals that TRPM2 channel activation drives amyloid-beta-induced inflammation in microglial cells, highlighting a potential therapeutic target for Alzheimer's disease.

Key Points

To determine how Aβ42 activates the TRPM2 ion channel in microglia and evaluate its contribution to microglial activation and neurotoxic TNF-α release in Alzheimer's disease models.
Treated microglial cells with increasing concentrations of Aβ42 (10–300 nM).
Evaluated microglial activation and TNF-α production following genetic deletion (TRPM2 knockout) or pharmacological inhibition of TRPM2.
Used targeted pathway inhibitors against PKC, NADPH oxidases (NOX), PARP-1, PYK2, and MEK/ERK to delineate upstream and downstream signaling cascades.
Aβ42 induced microglial activation and TNF-α generation in a concentration-dependent manner, both of which were completely ablated by TRPM2 knockout or channel inhibition.
Aβ42 activated TRPM2 channels by triggering PKC- and NOX-dependent reactive oxygen species generation, leading to PARP-1 activation.
TRPM2 downstream signaling engaged the PYK2 and MEK/ERK pathway, generating a positive feedback loop that further amplified PARP-1 and TRPM2 channel activity.

Cite This Study

Mortadza et al. (2017) studied this question.

synapsesocial.com/papers/6a9cf0dd2b006a14f397b0d8 https://doi.org/10.1002/glia.23265

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Implication

Experimental study reveals that TRPM2 channel activation drives amyloid-beta-induced inflammation in microglial cells, highlighting a potential therapeutic target for Alzheimer's disease.

A critical role of TRPM2 channel in Aβ42‐induced microglial activation and generation of tumor necrosis factor‐α

Discussion

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Implication

Key Points

Cite This Study

A critical role of TRPM2 channel in Aβ42‐induced microglial activation and generation of tumor necrosis factor‐α

Discussion

Member takes

Implication

Key Points

Cite This Study

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