作者:Jarkko Rautio、Tapio Nevalainen、Hannu Taipale、Jouko Vepsäläinen、Jukka Gynther、Krista Laine、Tomi Järvinen
DOI:10.1016/s0928-0987(00)00090-7
日期:2000.8
and piperazinylalkyl (4b-e) esters were synthesized and evaluated in vitro for their properties as bioreversible topically administered dermal prodrugs of naproxen. These ionizable prodrugs exhibited various aqueous solubilities and lipophilicities, depending on the pH of medium. As indicated by octanol-buffer partition coefficients (logP(app)) at pH 7.4, all of the prodrugs were significantly more lipophilic
合成了新的吗啉基(4a)和哌嗪基烷基(4b-e)酯,并在体外评估了它们作为萘普生生物可逆局部给药前药的性能。这些可电离的前药表现出各种水溶性和亲脂性,这取决于介质的pH。如在7.4的辛醇缓冲液分配系数(logP(app))所示,所有前药的亲脂性(logP(app)= 0.7-3.9)均比萘普生(logP(app)= 0.3)高得多。此外,水溶性最高的前药(4b-d)在pH 7.4(约30-50 mM)的水性缓冲液中的溶解度仅比萘普生(约100 mM)低2-3倍。在pH为5.0时,与萘普生相比,前药通常显示出更高的水溶性和类似的logP(app)值。分别在水性缓冲溶液(pH 5.0和7.4)和80%人血清(pH 7.4)中研究了前药在37摄氏度下的化学水解和酶促水解。前药显示出适度的化学稳定性(在pH 5.0时t(1/2)= 15-150天),并且它们被酶水解为萘普生,半衰期为0.4至77分