Back to Search
Start Over
Natural compounds with P2X7 receptor-modulating properties
- Source :
- Purinergic signalling. 10(2)
- Publication Year :
- 2013
-
Abstract
- The adenosine 5'-triphosphate (ATP)-gated P2X7 receptor is a membrane-bound, non-selective cation channel, expressed in a variety of cell types. The P2X7 senses high extracellular ATP concentrations and seems to be implicated in a wide range of cellular functions as well as pathophysiological processes, including immune responses and inflammation, release of gliotransmitters and cytokines, cancer cell growth or development of neurodegenerative diseases. In the present study, we identified natural compounds and analogues that can block or sensitize the ATP (1 mM)-induced Ca(2+) response using a HEK293 cell line stably expressing human P2X7 and fluorometric imaging plate reader technology. For instance, teniposide potently blocked the human P2X7 at sub-miromolar concentrations, but not human P2X4 or rat P2X2. A marked block of ATP-induced Ca(2+) entry and Yo-Pro-1 uptake was also observed in human A375 melanoma cells and mouse microglial cells, both expressing P2X7. On the other hand, agelasine (AGL) and garcinolic acid (GA) facilitated the P2X7 response to ATP in all three cell populations. GA also enhanced the YO-PRO-1 uptake, whereas AGL did not affect the ATP-stimulated intracellular accumulation of this dye. According to the pathophysiological role of P2X7 in various diseases, selective modulators may have potential for further development, e.g. as neuroprotective or antineoplastic drugs.
- Subjects :
- Cell type
Purinergic P2X Receptor Antagonists
Cell
Drug Evaluation, Preclinical
Fluorescent Antibody Technique
Biology
Purinergic P2X Receptor Agonists
Cellular and Molecular Neuroscience
Mice
medicine
Extracellular
Animals
Humans
Receptor
Molecular Biology
Microscopy, Confocal
HEK 293 cells
Cell Biology
Adenosine
Rats
medicine.anatomical_structure
HEK293 Cells
Biochemistry
Cancer cell
Original Article
Receptors, Purinergic P2X7
Intracellular
medicine.drug
Subjects
Details
- ISSN :
- 15739546
- Volume :
- 10
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Purinergic signalling
- Accession number :
- edsair.doi.dedup.....68003abaacfc6b738c562e12ee3f2dc0