Targeting Transient Receptor Potential (TRP) Channels, Mas-Related G-Protein-Coupled Receptors (Mrgprs), and Protease-Activated Receptors (PARs) to Relieve Itch.

Itch (pruritus) is a sensation in the skin that provokes the desire to scratch. The sensation of itch is mediated through a subclass of primary afferent sensory neurons, termed pruriceptors, which express molecular receptors that are activated by itch-evoking ligands. Also expressed in pruriceptors are several types of Transient Receptor Potential (TRP) channels.

ANTINOCICEPTIVE TOLERANCE TO CANNABINOIDS IN ADULT MALE MICE: A PILOT STUDY.

Over the past two decades, numerous tools have been developed to study the endocannabinoid system. Studies show the potential effectiveness of endocannabinoids for the relief of pain and neurological disorders. However, global targeting of the endocannabinoid system has also been associated with unwanted outcomes, including deleterious effects on cognitive and emotional functions, the development of tolerance and dependence, and withdrawal symptoms after drug cessation in humans.

FRAX-based intervention thresholds in eight Eurasian countries: Armenia, Belarus, Georgia, Kazakhstan, the Kyrgyz Republic, Moldova, the Russian Federation, and Uzbekistan.

Unlabelled: Age-specific intervention and assessment thresholds based on FRAX® were developed for eight Eurasian countries participating in the EVA study (Armenia, Belarus, Georgia, Moldova, Kazakhstan, the Kyrgyz Republic, the Russian Federation, and Uzbekistan). The intervention thresholds (major osteoporotic fracture) ranged from 3.6 (Armenia and Georgia) to 12.

Thermal Hyperalgesia and Mechanical Allodynia Elicited by Histamine and Non-histaminergic Itch Mediators: Respective Involvement of TRPV1 and TRPA1.

Acute itch is elicited by histamine, as well as non-histaminergic itch mediators including chloroquine, BAM8-22 and Ser-Leu-Ile-Gly-Arg-Leu (SLIGRL). When injected intradermally, histamine binds to histamine H1 and H4 receptors that activate transient receptor potential vanilloid 1 (TRPV1) to depolarize pruriceptors. Chloroquine, BAM8-22, and SLIGRL, respectively, bind to Mas-related G-protein-coupled receptors MrgprA3, MrgprC11, and MrgprC11/PAR2 that in turn activate transient receptor potential ankyrin 1 (TRPA1).