Anandamide suppresses proliferation and cytokine release from primary human T-lymphocytes mainly via CB2 receptors.

PloS One
Maria Teresa CencioniMauro Maccarrone

Abstract

Anandamide (AEA) is an endogenous lipid mediator that exerts several effects in the brain as well as in peripheral tissues. These effects are mediated mainly by two types of cannabinoid receptors, named CB(1)R and CB(2)R, making AEA a prominent member of the "endocannabinoid" family. Also immune cells express CB(1) and CB(2) receptors, and possess the whole machinery responsible for endocannabinoid metabolism. Not surprisingly, evidence has been accumulated showing manifold roles of endocannabinoids in the modulation of the immune system. However, details of such a modulation have not yet been disclosed in primary human T-cells. In this investigation we used flow cytometry and ELISA tests, in order to show that AEA suppresses proliferation and release of cytokines like IL-2, TNF-alpha and INF-gamma from activated human peripheral T-lymphocytes. However, AEA did not exert any cytotoxic effect on T-cells. The immunosuppression induced by AEA was mainly dependent on CB(2)R, since it could be mimicked by the CB(2)R selective agonist JWH-015, and could be blocked by the specific CB(2)R antagonist SR144528. Instead the selective CB(1)R agonist ACEA, or the selective CB(1)R antagonist SR141716, were ineffective. Furthermore, we demons...Continue Reading

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Methods Mentioned

BETA
Flow Cytometry
PCR
confocal microscopy
FCS
FACS
Assay
enzyme-linked immunosorbent assay
ELISA

Software Mentioned

GraphPAD
Flowjo
Prism
LAS AF
Leica TCS SP
Leica

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