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Tetrahydrocannabinol (THC) is a phytocannabinoid that primarily interacts with the CB1 receptor, a type of G protein-coupled receptor (GPCR) predominantly in and around the chemoreceptor trigger zone (CTZ) and emetic center. THC also blocks the serotonin receptor activity in the dorsal vagal complex (DVC) by inhibiting serotonin release. THC exerts its anti-emetic effects through these interactions, which are beneficial for patients undergoing chemotherapy.
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Circulating Endocannabinoids in Huntington's Disease: An Exploratory Cross-Sectional Study.

Pedro Manzke1,2, José Alexandre de Souza Crippa2, Camila Marchioni3

  • 1Hospital de Base do Distrito Federal, Brasilia, Brazil.

Journal of Huntington'S Disease
|February 6, 2022
PubMed
Summary

Plasma levels of anandamide and 2-arachidonoylglycerol did not differ between Huntington's disease gene-expansion carriers and controls. The endocannabinoid system may not be directly implicated in Huntington's disease pathophysiology.

Keywords:
2-arachdonoyglycerolHuntington’s diseaseanandamideclinical featuresclinical scalesendocannabinoid system

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Area of Science:

  • Neuroscience
  • Genetics
  • Biochemistry

Background:

  • Huntington's disease (HD) is an inherited neurodegenerative disorder with motor, cognitive, and behavioral symptoms.
  • The endocannabinoid system, involving compounds like anandamide and 2-arachidonoylglycerol, has been suggested to play a role in HD pathophysiology.

Discussion:

  • This cross-sectional study investigated plasma endocannabinoid levels in manifest Huntington's disease gene-expansion carriers (HDGEC) and healthy controls.
  • No significant differences were found in anandamide or 2-arachidonoylglycerol levels between HDGEC and controls.
  • Endocannabinoid levels did not correlate significantly with clinical assessments of HD severity.

Key Insights:

  • The endocannabinoid system does not appear to be directly altered in terms of plasma anandamide and 2-arachidonoylglycerol levels in manifest Huntington's disease.
  • A significant association between body mass index and anandamide levels was observed in healthy controls, but not in HDGEC, suggesting potential metabolic differences.

Outlook:

  • Further research is needed to explore the complex interplay between the endocannabinoid system and Huntington's disease, potentially investigating other endocannabinoids or different stages of the disease.
  • Investigating the non-significant association between endocannabinoid levels and clinical scales may reveal subtle roles or compensatory mechanisms.
  • Understanding the differential association of body mass index with anandamide in controls versus HDGEC could offer insights into metabolic dysregulation in HD.