Inhibitory effect of 2-(E-2-alkenoylamino)ethyl alkyl sulfides on gastric ulceration in rats. I. Effect of 2-(E-2-alkenoylamino)ethyl carbamoylmethyl sulfides on gastric secretion and various ulceration models in rats.
作者:MASAKAZU IWAI、ISAO KOHDA、CHIKARA FUKAYA、YOICHIRO NAITO、KAZUMASA YOKOYAMA、HIROSHI NAKAJIMA、KAZUTAKE TSUJIKAWA、MASARU OKABE、TSUTOMU MIMURA
DOI:10.1248/cpb.35.4616
日期:——
Bis [2- (E-2-alkenoylaminoethyl)] disulfides (I) and 2- (E-2-alkenoylamino) ethyl carbamoylmethyl sulfides (II) with various alkenyl chain lengths were synthesized and their inhibitory effects on gastric secretion in rats were compared. There was a relationship between the alkenyl chain length of a series of sulfide derivatives (II) and their biological activities (C10 and C11 alkenyl derivatives were the most effective compounds). On the other hand, variation of the alkenyl chain length did not affect the anti-ulcerogenic activity of the disulfide derivatives (I). The derivatives (II) showed stronger biological activity than (I) when the same alkenyl group was present in both. The administration of 2- (E-2-decenoylamino) ethyl carbamoylmethyl sulfide (II-5) or 2- (E-2-undecenoylamino) ethyl carbamoylmethyl sulfide (II-6) at a dose of 20 mg/kg (i.p.) caused significant inhibition of various experimental ulcerations caused by stress, aspirin and HCl-ethanol. Oral administration of both acetamides (II-5, II-6) also caused 50-60% inhibition of ulceration in the water-immersion stress model at a dose of 20 mg/kg, although the activity was not as strong as that after i.p. injection. An improvement in anti-ulcerogenic activity was observed when acetamides were administered as a suspension in 10% HCO-60. Both acetamides (II-5, II-6) caused a dose-dependent decrease of the ulcer index of restrained and water-immersion stress-loaded rats in the dosage range from 0.5 mg/kg p.o. to 5 mg/kg p.o. The lethal dose 50% values (LD50) for both acetamides were over 8 g/kg (p.o. or i.p.).
合成了各种烯烃链长度的双[2-(E-2-烯酰氨基乙基)]二硫化物 (I) 和 2-(E-2-烯酰氨基)乙基氨基甲基硫化物 (II),并比较了它们对大鼠胃分泌的抑制作用。硫化物衍生物 (II) 的生物活性与烯烃链的长度之间存在一定关系(C10 和 C11 烯烃衍生物是最有效的化合物)。另一方面,烯烃链长度的变化并未影响二硫化物衍生物 (I) 的抗溃疡活性。当两者具有相同的烯烃基时,衍生物 (II) 的生物活性比 (I) 更强。以 20 mg/kg(i.p.)的剂量给药 2-(E-2-癸烯酰氨基)乙基氨基甲基硫化物 (II-5) 或 2-(E-2-十一烯酰氨基)乙基氨基甲基硫化物 (II-6) 显著抑制了由压力、阿司匹林和盐酸-乙醇引起的各种实验性溃疡。以 20 mg/kg 的剂量口服两种醋酸胺 (II-5, II-6) 也在水浸应激模型中引起了 50-60% 的溃疡抑制,尽管其活性不及腹腔注射后的强。以 10% HCO-60 悬浮液给药时,观察到醋酸胺的抗溃疡活性有所改善。这两种醋酸胺 (II-5, II-6) 在 0.5 mg/kg p.o. 到 5 mg/kg p.o. 剂量范围内引起了被限制和水浸应激负荷大鼠的溃疡指数的剂量依赖性下降。这两种醋酸胺的半数致死剂量 (LD50) 均超过 8 g/kg(口服或腹腔注射)。