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“ Saponin , essential oil and flavonoids could dose-dependently inhibit NO production in LPS-induced RAW 264.7 macrophages, whose inhibition rates were 65.4%, 73.0% and 80.4% at concentration of 50 μg/ml, respectively.”
“From this extract, eight compounds [two naphthofuranoxepins (1, 2), one phenanthraquinone (3), three steroids (4-6) and two steroidal saponins (7, 8)] were isolated and further investigated for their inhibitory properties of NO production.”
“6 L‐NAME and saponin also inhibited 5‐HT, ACh and substance P‐induced NO release (P < 0.05), without affecting equivalent responses to SNP.”
“ Saponin (three cycles of 2 min of 30 μg … 2 min control perfusion) reduced basal coronary NO content by a similar amount (307 ± 22 pmol min−1 g−1) but reduced basal coronary … ± 0.2 ml min−1 g−1 (P < 0.05 versus the effect of L‐NAME).”