“Relaxation … to methacholine and A23187 was: 1) not affected by indomethacin pretreatment (20 microM, 30 min); 2) inhibited by … eicosatetraynoic acid pretreatment, 53 and 33%, respectively; and 3) inhibited in a dose-dependent manner by nordihydroguaiaretic acid (10-50 microM) with complete inhibition … 25 and 50 microM pretreatment, respectively.”