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Visualization of Cortical Modules in Flattened Mammalian Cortices
Published on: January 22, 2018
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fMRI indicates cortical activation through TRPV1 modulation during acute gouty attacks.
Chiao-Chi Chen1, Chen Chang2, Yi-Hua Hsu1
1Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Scientific Reports
|August 28, 2019
Summary
Gout pain involves central nervous system changes, specifically in the thalamocortical regions. Blocking the TRPV1 channel in the brain effectively reduced pain and brain activity in gouty arthritis models.
Area of Science:
- Neuroscience
- Pain Research
- Medical Imaging
Background:
- Gout is a severe condition characterized by intense pain, with the central pain processing mechanisms not fully understood.
- Cerebral blood volume (CBV) changes, measurable via functional magnetic resonance imaging (fMRI), can reflect brain activity.
- Transient Receptor Potential Vanilloid 1 (TRPV1) channels are implicated in pain signaling both peripherally and centrally.
Purpose of the Study:
- To investigate the central mechanisms of pain processing in gouty arthritis.
- To explore the role of Transient Receptor Potential Vanilloid 1 (TRPV1) in gout-induced pain.
- To utilize CBV-weighted fMRI to assess brain activity changes associated with gout pain.
Main Methods:
- Inducing gouty arthritis in rats and applying noxious stimulation.
- Measuring cerebral blood volume (CBV) changes using fMRI.
- Assessing TRPV1 protein expression and pain behaviors.
- Administering a selective TRPV1 antagonist (AMG9810) intrathecally.
Main Results:
- Noxious stimulation in gouty rats caused increased CBV in the somatosensory cortex and thalamus.
- These CBV increases correlated with elevated TRPV1 expression and heightened pain behaviors.
- Intrathecal administration of AMG9810 significantly reduced pain behaviors and abolished the fMRI-detected CBV increases in thalamocortical areas.
Conclusions:
- TRPV1 channel activation within the central pain pathway is critical for augmenting pain in gouty conditions.
- fMRI is a valuable tool for evaluating central pain processing and treatment efficacy in gout.
- Targeting central TRPV1 channels presents a potential therapeutic strategy for managing gout pain.
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