Effect of coenzyme Q10, a quinone derivative, on guinea pig lung and tracheal tissue

In the present investigation, the effect of coenzyme Q10 (E-0216) on histamine or SRS-A (slow-reacting substance of anaphylaxis) release from passively sensitized guinea pig lung tissue and on the actions of various bronchoactive-agents in isolated perfused guinea pig tracheal strips was studied. The amount of histamine and SRS-A released from passively sensitized guinea pig lung tissue by the challenge of antigen showed a marked decrease by preincubating with coenzyme Q10. The percentage inhibition of histamine and SRS-A was biggest at the concentration of 10 micrograms/ml of coenzyme Q10. Prostaglandin F2 alpha-, acetylcholine-, serotonin-, and bradykinin-induced contractile responses in guinea pig tracheal strips did not show any significant increase by continuous infusion of coenzyme Q10 (0.05-5.0 micrograms/ml). On the other hand, histamine-induced contractile responses showed a significant increase by continuous infusion of 0.5 microgram/ml of coenzyme Q10. Isoprenaline (isoproterenol)- and salbutamol-induced relaxation responses in guinea pig tracheal strips did not show any significant decrease by continuous infusion of coenzyme Q10 (0.05-5.0 micrograms/ml). On the other hand, prostaglandin E2-induced relaxation responses showed a significant decrease by continuous infusion 0.05-5.0 micrograms/ml of coenzyme Q10.