Scleral permeability of a small, single-stranded oligonucleotide.

Scleral permeability of a small, single-stranded oligonucleotide.
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小单链寡核苷酸的巩膜通透性。

DOI:
10.1089/108076804773710830
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发表时间:
2004
期刊:
Journal of ocular pharmacology and therapeutics : the official journal of the Association for Ocular Pharmacology and Therapeutics.
影响因子:
--
通讯作者:
Edelhauser,HenryF
Edelhauser,HenryF
中科院分区:
--
文献类型:
--
作者:
ShulerJr,RKeith;Dioguardi,PhyllisK;Henjy,Charles;Nickerson,JohnM;Cruysberg,LPJ;Edelhauser,HenryF

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开发更有效的眼部药物输送系统对于改善眼后段疾病的治疗至关重要。与更传统的后段给药方式相比,巩膜提供的大目标区域和潜在的威胁视力的并发症较少是经巩膜给药的优点。我们的目的是确定小单链寡核苷酸体外扩散穿过人类巩膜的渗透系数。通过将 100μL 2.96 × 10-4mol 单链荧光素标记寡核苷酸(MW = 7998.3)放置在安装在灌注室中的巩膜外层表面上来测量经巩膜渗透性。 24小时内每小时收集脉络膜灌注液的级分。 裸露、单链、荧光素标记寡核苷酸经巩膜扩散的渗透性常数或Ktrans为7.67±1.8×10-7cm/s(平均值±SEM,N=7)。巩膜内注射相同荧光素标记寡核苷酸后的渗透性常数或Ktrans为1.32±0.42×10-7(平均值±SEM,N=4)。该分析表明裸露的、24碱基的、单链的、荧光素标记的寡核苷酸的扩散可以通过所描述的两种方法来完成。 鉴于使用类似分子的几种新型治疗策略的开发,跨巩膜递送单链寡核苷酸的能力可能被证明是有利的。
Developing more effective ocular drug delivery systems is essential to improving the treatment of posterior segment eye disease. The large target area provided by the sclera and potentially less vision threatening complications are advantages of transscleral administration compared to more traditional modalities of drug delivery to the posterior segment. We aimed to determine the permeability coefficient for thein vitrodiffusion of a small, single-stranded, oligonucleotide across human sclera. Transscleral permeability was measured by placing 100μL of 2.96 × 10-4mol single-stranded, fluorescein-labeled oligonucleotide (MW = 7998.3) on the episcleral surface of sclera mounted in a perfusion chamber. Fractions of choroidal perfusate were collected hourly for 24 hours. The permeability constant orKtransfor the transscleral diffusion of the naked, single-stranded, fluorescein-labeled oligonucleotide was 7.67 ± 1.8 × 10-7cm/s (mean ± SEM,N= 7). The permeability constant orKtransafter intrascleral injection of the same fluorescein-labeled oligonucleotide was 1.32 ± 0.42 × 10-7(mean ± SEM,N= 4). This analysis demonstrates that diffusion of a naked, 24-base, single-stranded, fluorescein-labeled oligonucleotide can be accomplished by both of the described methods. The ability to deliver single-stranded oligonucleotides across the sclera may prove to be advantageous given the development of several novel therapeutic strategies that use similar molecules.
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DOI: --
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影响因子: --
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