Abstract：
:Inhibitory effects of the saponin fraction and its principal constituents, escins Ia, Ib, IIa, and IIb, from horse chestnuts on gastric emptying were investigated in mice loaded with a non-nutrient or nutrient meal. The saponin fraction and escins Ia-IIb inhibited gastric emptying of a 1.5% carboxymethyl cellulose sodium salt (CMC-Na) meal by 11.1-54.2% (12.5-200 mg/kg). Escins Ia-IIb (50 mg/kg) also inhibited gastric emptying of a 40% glucose meal by 21.1-23.5% except for escin Ia, a milk meal by 18.4-33.1%, and a 30% ethanol meal by 13.5-15.9%. The effects of escins Ia-IIb on gastric emptying of the CMC-Na meal were attenuated by pretreatment with streptozotocin (100 mg/kg, i.v.), capsaicin (75 mg/kg in total, s.c.), or insulin (1 U/kg, s.c.). The effect of insulin was reduced by glucose (2 g/kg, i.v.) which can directly nourish the brain, but not by fructose (2 g/kg, i.v.) which cannot be utilized by the brain. The effects of escins Ia-IIb (50 mg/kg) were overridden in 60% ethanol-loaded mice, in which the central nervous system was suppressed by ethanol. These results suggest that capsaicin-sensitive sensory nerves and central nervous system partly participate in the effects of escins Ia-IIb.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Matsuda H,Li Y,Murakami T,Yamahara J,Yoshikawa Mdoi
10.1016/s0014-2999(99)00035-7keywords:
subject
Has Abstractpub_date
1999-03-05 00:00:00pages
237-43issue
2-3eissn
0014-2999issn
1879-0712pii
S0014-2999(99)00035-7journal_volume
368pub_type
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