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ARMS/Kidins220 regulates nociception by controlling brain-derived neurotrophic factor secretion
Julia Sánchez-Sánchez1,2, Cristina Vicente-García1,2, Daniel Cañada-García1,2
1Department of Cell Biology and Pathology, Instituto de Neurociencias de Castilla y León (INCyL), Universidad de Salamanca, Salamanca, Spain.
The scaffold protein ARMS/Kidins220 modulates pain by regulating nerve growth factor (NGF)/TrkA signaling. Reduced ARMS/Kidins220 enhances brain-derived neurotrophic factor (BDNF) secretion, impacting nociception.
Area of Science:
- Neuroscience
- Molecular Biology
- Pain Research
Background:
- The nerve growth factor (NGF)/TrkA pathway is crucial for pain signaling.
- Understanding NGF/TrkA-mediated nociception is vital due to challenges with anti-NGF therapies.
- ARMS/Kidins220 is identified as a potential key player in this pathway.
Purpose of the Study:
- To investigate the role of ARMS/Kidins220 in nociception.
- To elucidate the mechanism by which ARMS/Kidins220 influences pain signaling.
- To explore the relationship between ARMS/Kidins220, NGF/TrkA, and BDNF in pain modulation.
Main Methods:
- Generated male mice with reduced ARMS/Kidins220 specifically in TrkA-expressing cells.
- Assessed nociceptive responses to various stimuli (heat, inflammatory, capsaicin, cold, mechanical).
- Investigated the interplay between ARMS/Kidins220 and brain-derived neurotrophic factor (BDNF) by simultaneous deletion.
- Examined the effect of capsaicin on ARMS/Kidins220 levels in vitro and in vivo.
- Analyzed the role of calpains in ARMS/Kidins220 reduction and BDNF secretion.
Main Results:
- Reduced ARMS/Kidins220 in TrkA-expressing cells led to hyperalgesia to heat, inflammatory, and capsaicin stimuli.
- No changes in cold or mechanical pain sensitivity were observed.
- Simultaneous deletion of BDNF reversed the hyperalgesic effects of ARMS/Kidins220 reduction.
- Capsaicin treatment reduced ARMS/Kidins220 levels via calpains, increasing BDNF secretion from dorsal root ganglion neurons.
- ARMS/Kidins220 acts as a regulator of BDNF secretion within the NGF/TrkA pain axis.
Conclusions:
- ARMS/Kidins220 is a novel modulator of nociception within the NGF/TrkA signaling pathway.
- ARMS/Kidins220 levels are dynamically regulated and influence pain sensitivity.
- Targeting ARMS/Kidins220 or its downstream effects on BDNF secretion may offer new therapeutic strategies for pain management.
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