Fluvastatin suppresses native and recombinant human P2X4 receptor function.
Statins have both cholesterol lowering and anti-inflammatory activities, whether mechanisms underlying their activities are independent remains unclear. The ATP-gated P2X(4) receptor is a pro-inflammatory mediator. Here, we investigate the action of fluvastatin and other cholesterol depleting agents on native and recombinant human P2X(4) receptor. Fluvastatin and mβCD suppressed P2X(4)-dependent calcium influx in THP-1 monocytes, without affecting P2Y receptor responses. mβCD or filipin III suppressed the current density of recombinant human P2X(4) receptors. Human P2X(2) was insensitive to cholesterol depletion. Cholesterol depletion had no effect on intrinsic P2X(4) receptor properties as judged by ATP concentration-response relationship, receptor rundown or current decay during agonist occupancy. These data suggest fluvastatin suppresses P2X(4) activity in monocytes through cholesterol depletion and not by modulating intrinsic channel properties.
Multidisiplinary Centre for Cardiovascular Research, University of Leeds, Leeds, UK.
Jing
J
Li
Samuel J
SJ
Fountain
D000924:Anticholesteremic Agents / Q000494:pharmacology*; D015536:Down-Regulation / Q000187:drug effects*; D005229:Fatty Acids, Monounsaturated / Q000494:pharmacology*; D000077340:Fluvastatin; D057809:HEK293 Cells; D006801:Humans; D007211:Indoles / Q000494:pharmacology*; D009000:Monocytes / Q000187:drug effects / Q000502:physiology; D058914:Purinergic Antagonists / Q000494:pharmacology*; D058848:Receptors, Purinergic P2X4 / Q000378:metabolism* / Q000502:physiology; D011994:Recombinant Proteins / Q000037:antagonists & inhibitors
D000924:Anticholesteremic Agents; D005229:Fatty Acids, Monounsaturated; D007211:Indoles; D058914:Purinergic Antagonists; D058848:Receptors, Purinergic P2X4; D011994:Recombinant Proteins; D000077340:Fluvastatin