Abstract
Previous studies have indicated the antitumoral effect of human melanocytes, human melanoma cell lines expressing CB1 receptor (CB1), and of the peritumoral administration of endocannabinoids. In the present study, we systematically screened several human melanoma cell lines for the expression of CNR1 and demonstrated transcription of the authentic gene. The product of CNR1, the CB1 protein, was found localized to the cell membrane as well as to the cytoskeleton. Further, the studied human melanoma cell lines expressed functional CB1 since physiological and synthetic ligands, anandamide (AEA), Met-F-AEA, ACEA and AM251 showed a wide range of biological effects in vitro, for example anti-proliferative, proapoptotic and anti-migratory. More importantly, our studies revealed that systemic administration of a stable CB1 agonist, ACEA, into SCID mice specifically inhibited liver colonization of human melanoma cells. Since therapeutic options for melanoma patients are still very limited, the endocannabinoid-CB1 receptor system may offer a novel target.
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Abbreviations
- 2-AG:
-
2-arachidonoylglycerol
- A:
-
Adenosine
- ACEA:
-
Arachidonyl-2-chloroethylamide
- AEA:
-
Anandamide
- AKT:
-
Protein kinase B
- AM251:
-
N-piperidinyl-iodophenyl-dichlorophenyl-methylpyrazole-carboxamide
- BSA:
-
Bovine serum albumin
- C:
-
Cytosine
- Ca:
-
Calcium
- CB:
-
Cannabinoid
- CB1:
-
Cannabinoid receptor 1
- CB2:
-
Cannabinoid receptor 2
- CNR1:
-
Gene of cannabinoid receptor 1
- cDNA:
-
Complementary deoxyribonucleic acid
- DEPC:
-
Diethylpyrocarbonate
- DMSO:
-
Dimethyl sulfoxide
- DNA:
-
Deoxyribonucleic acid
- COX:
-
Cyclooxygenase
- EDTA:
-
Ethylenediaminetetraacetic acid
- FAAH:
-
Fatty acid amide hydrolase
- FCS:
-
Fetal calf serum
- FITC:
-
Fluorescein isothiocyanate
- G:
-
Guanine
- GPCR:
-
G protein-coupled receptor
- IC50:
-
Half maximal inhibitory concentration
- IFN:
-
Interferon
- IL:
-
Interleukin
- LOX:
-
Lipooxygenase
- MAGL:
-
Monoacylglycerol lipase
- MAPK:
-
Mitogen-activated protein kinase
- Met-F-AEA:
-
2-methyl-2-fluoro-anandamide
- mTOR:
-
Mammalian target of rapamycin
- MTT:
-
Thiazolyl blue tetrazolium bromide
- P:
-
Probability
- PBS:
-
Phosphate-buffered saline
- PCR:
-
Polymerase chain reaction
- PI:
-
Propidium iodide
- PI3K:
-
Phosphatidylinositol-3 kinase
- RAF:
-
RAF oncogene
- RAS:
-
RAS oncogene
- Rb:
-
Retinoblastoma
- RNA:
-
Ribonucleic acid
- SCID:
-
Severe combined immunodeficiency
- T:
-
Thymine
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Acknowledgments
This work was supported by TAMOP 4.2.1b, OTKA-NK72595 (JTi) and OTKA-K84173 (JTó).
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István Kenessey and Balázs Bánki equal contribution.
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Kenessey, I., Bánki, B., Márk, Á. et al. Revisiting CB1 Receptor as Drug Target in Human Melanoma. Pathol. Oncol. Res. 18, 857–866 (2012). https://doi.org/10.1007/s12253-012-9515-y
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DOI: https://doi.org/10.1007/s12253-012-9515-y