Abstract Title:

Endocannabinoid system in cancer cachexia.

Abstract Source:

Curr Opin Clin Nutr Metab Care. 2007 Jul ;10(4):443-8. PMID: 17563462

Abstract Author(s):

Douglas Osei-Hyiaman

Article Affiliation:

Douglas Osei-Hyiaman

Abstract:

PURPOSE OF REVIEW: More than 60% of advanced cancer patients suffer from anorexia and cachexia. This review focuses on the possible mechanisms by which the endocannabinoid system antagonizes cachexia-anorexia processes in cancer patients and how it can be tapped for therapeutic applications.

RECENT FINDINGS: Cannabinoids stimulate appetite and food intake. Hepatocytes express functional cannabinoid type 1 receptors, activation of which increases the expression of lipogenic genes (e.g those encoding sterol regulatory element binding protein 1c, acetyl-coenzyme A carboxylase-1, and fatty acid synthase in the liver and hypothalamus) and increase de-novo fatty acid synthesis, which contributes to development of diet-induced obesity. Both ghrelin and cannabinoids stimulate AMP-activated protein kinase in the hypothalamus, whereas they inhibit it in the liver and adipose tissues. Both anandamide and synthetic cannabinoid type 1 receptor agonists such as HU210 and the plant-derived cannabinoid tetrahydro-cannabinol also significantly inhibit tumor necrosis factor-alpha.

SUMMARY: Cannabinoid type 1 receptor activation stimulates appetite and promotes lipogenesis and energy storage. Further study of cancer-cachexia pathophysiology and the role of endocannabinoids will help us to develop cannabinoids without psychotropic properties, which will help cancer patients suffering from cachexia and improve outcomes of clinical antitumor therapy.

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Sayer Ji
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