醋酸阿肽地尔是一种活性多肽为从小肠粘膜提取的一种直链肽。由28个氨基酸残基组成，其排列为一部分胰高血糖素（glucagon）和催胰液素（secretin），具有可使血管舒张降低血压的作用。从肝动脉开始，对内脏血管具有较强的作用能力，但对股动脉则全无作用。对肠液的分泌具有很强的促进作用，但对胰腺的分泌其促进作用很弱，对胃液的分泌可起抑制作用，对消化道平滑肌的收缩产生抑制作用。
醋酸阿肽地尔为Mondobiotech AG和Biogen Idec公司开发出来，是由28个氨基酸组成的线性肽，主要用于急性呼吸窘迫综合症和特发性肺纤维化治疗，其效果较好且副作用小，是一种很有市场前景的多肽药物。
GPR14
Aviptadil inhibits the basal proliferation of pulmonary arterial smooth muscle cells (PASMC) and the mobilization of intracellular free calcium concentration in these cells in a dose-dependent manner.Aviptadil (1 nM-10 μM) produces a concentration-dependent inhibition of CSE-induced cell death in L2 cells. At 10 μM, Aviptadil reduces CSE-stimulated MMP activity and caspase-3 activation in L2 cells.Aviptadil (10 nM-100 μM) attenuates lipopolisaccharide (LPS)-induced MMP-9 activity and its expression by alveolar macrophages (AM) in rats.
Aviptadil (1, 3 and 10 mg/kg; intravenous bolus injection) is injected into a tail vein. No-effect dose level is 1 mg/kg. Dose level with first intolerance reactions 3 mg/kg, Lowest lethal dose level is >10 mg/kg. i.v. LD 50 of Aviptadil is >10 mg/kg in males, females and male and female combined after 24 hours and 14 days.Aviptadil (intravenous bolus injection) at 3 mg causes slightly reduced motility, slight ataxia and slight dyspnoea in all 5 male and 5 female animals 15 to 30 minutes after administration. At 10 mg, Aviptadil reveals slightly reduced motility, slight ataxia, and slight dyspnoea 15 to 60 minutes and slightly reduces muscle tone 15 to 30 minutes after administration, respectively, in all male and female animals.Nose-only inhalation exposure of CD1 mice to aerosolized.Aviptadil at a dose of 1546 µg/kg/day is well tolerated and produces no apparent changes in any of the parameters evaluated. No changes are observed after a single dose administration as high as 3920 µg/kg/day. The no-observable-adverse-effect level (NOAEL) is considered to be at least 3920 µg/kg/day fore an acute exposure and 1546 µg/kg/day for a 10 day repeated exposure.