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Diffuse Noxious Inhibitory Controls in Chronic Pain States: Insights from Pre-Clinical Studies
Raquel Pereira-Silva1,2,3, Fani L Neto1,2,3, Isabel Martins1,2,3
1Instituto de Investigação e Inovação em Saúde da Universidade do Porto-i3S, R. Alfredo Allen 208, 4200-135 Porto, Portugal.
International Journal of Molecular Sciences
|January 11, 2025
Summary
Diffuse noxious inhibitory control (DNIC), or conditioned pain modulation (CPM), involves pain inhibition via remote stimuli. Recent studies reveal its dual analgesic and hyperalgesic effects, crucial for understanding chronic pain and guiding treatment.
Area of Science:
- Neuroscience
- Pain Research
- Pharmacology
Background:
- Diffuse noxious inhibitory control (DNIC), known as conditioned pain modulation (CPM) in humans, is a key endogenous pain inhibitory mechanism.
- Pre-clinical and clinical evidence implicates noradrenergic, serotonergic, and opioidergic systems in DNIC/CPM.
- Understanding these neurochemical systems is vital for deciphering pain regulation.
Purpose of the Study:
- To review and analyze the latest monoaminergic and opioidergic studies on DNIC/CPM, particularly in chronic pain models.
- To integrate data on these systems with descending pain modulatory circuits.
- To elucidate the neurochemical mechanisms regulating DNIC and its dual outcomes.
Main Methods:
- Comprehensive literature review of pre-clinical and clinical studies on DNIC/CPM.
- Focus on monoaminergic and opioidergic systems.
- Integration of data with descending pain modulatory pathways.
Main Results:
- DNIC/CPM involves complex neurochemical systems, notably noradrenergic, serotonergic, and opioidergic pathways.
- Recent data suggest DNIC can produce both analgesic and hyperalgesic effects.
- This duality is linked to underlying circuitry and specific receptor subtypes.
Conclusions:
- The dual outcome of DNIC/CPM highlights its complexity and potential prognostic value.
- DNIC/CPM may serve as a predictive biomarker for pain treatment efficacy.
- Targeting descending pain modulation pathways could optimize pain management strategies.
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