Improved delivery through biological membranes. 26. Design, synthesis, and pharmacological activity of a novel chemical delivery system for .beta.-adrenergic blocking agents
作者:Nicholas Bodor、Alaaeldin ElKoussi、Masanobu Kano、Toshio Nakamura
DOI:10.1021/jm00396a015
日期:1988.1
Novel ketoxime analogues of known beta-blockers (propranolol, timolol, carteolol) were synthesized and tested as potential site-specific chemical delivery systems. It was assumed that a hydrolysis-reduction sequence could produce the active beta-blockers in the iris-ciliary body. It was found that some of these bioprecursors are remarkably active in reducing intraocular pressure in rabbits. The ketoxime
合成了已知的β-受体阻滞剂(普萘洛尔,噻吗洛尔,卡替洛尔)的新型酮肟类似物,并测试了其作为潜在的特定部位化学递送系统的能力。假定水解-还原序列可以在虹膜睫状体中产生活性β-受体阻滞剂。发现这些生物前体中的一些在降低兔眼内压方面具有显着活性。普萘洛尔的酮肟衍生物比其母体β-受体阻滞剂更有效,刺激性也更小。虽然酮肟在静脉注射后也表现出对异丙肾上腺素诱导的心动过速的活性,但口服时它们没有活性。局部给药酮肟肟前体后,在兔眼中发现了普萘洛尔的时间延长且浓度很高。然而,灭活的酮肟显然不会在眼睛中转化为相应的β受体阻滞剂。发现在酮肟的物理化学性质与其转化为氨基醇之间的相关性,进而发现它们的后续活性之间存在相关性。结果表明,至少一些酮肟前体可以用作抗青光眼药物,而没有全身性副作用。