Abstract
In this review we discussed normal physiology of pain; receptors, pathways and transmitters, to compare the normal with abnormal finding in chronic neuropathic pain. We demonstrated the possible new mechanisms explaining mechanisms of chronic pain with probable new coming pharmacological solutions and recent trials to introduce new drugs capable for reducing pain intensity to improve the quality of life. Glial cells in CNS showed an important role and component in central sensitization pathway. Long non-coding RNAs (lncRNA) and Cysteinyl-aspartate-specific proteases (CASPs) showed a high-level concentration in nervous systems in patients with chronic pain. Mitochondria also was found to be involved in chronic pain through reactive oxygen species (ROS). Blocking ATP pathways in mitochondria showed positive results. However, the absolute mechanism is not well understood, multiple theories have recommended many drugs with promising effects.
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Abbreviations
- BDNF:
-
Brain-derived neurotrophic factor
- Caspase-6:
-
Cysteine-aspartic acid protease-6
- CNS:
-
Central nervous system
- CSF-1:
-
Colony-stimulating factor-1
- CX:
-
Connexin
- DAMPs:
-
Damage-associated molecular patterns
- GABA:
-
Gamma-aminobutyric acid
- JAK-STAT:
-
Janus kinase/signal transducer and activator of the transcription
- lncRNA:
-
Long non-coding RNAs
- MMPs:
-
Matrix metalloproteinases
- NMDA:
-
N-methyl-d-aspartate
- PRR:
-
Pattern-recognition receptors
- RAGE:
-
Advanced glycation end products
- TNF:
-
Tumor necrosis factors
- TRP:
-
Transient receptor potential channels
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Abbas, K.S., Allam, A.ES., Galluccio, F., El OUMRI, A.A., AlKharabsheh, A., Salti, A. (2022). Pathophysiology of Chronic Pain. In: de Castro, J., El Miedany, Y. (eds) Advances in Chronic and Neuropathic Pain. Contemporary Rheumatology. Springer, Cham. https://doi.org/10.1007/978-3-031-10687-3_3
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