期刊
INTERNATIONAL JOURNAL OF PHARMACEUTICS
卷 631, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ijpharm.2022.122476
关键词
Oral peptide delivery; Salmon calcitonin; Hydrophobic ion pairing; Self-emulsifying drug delivery systems; Lipophilic counterions
Hydrophobic ion pairing and incorporation into SEDDS is a promising strategy for oral delivery of hydrophilic macromolecular drugs. In this study, hydrophobic ion pairs (HIP) between sCT and highly lipophilic sulfosuccinate counterions were formed. The use of bis(isotridecyl) sulfosuccinate resulted in the highest lipophilicity and improved solubility in lipophilic co-solvents. The HIP-loaded SEDDS showed excellent pharmacological activity in rats, with a relative hypocalcaemic effect of 13.8 +/- 5.6%.
Hydrophobic ion pairing and subsequent incorporation into self-emulsifying drug delivery systems (SEDDS) is a promising strategy to orally deliver hydrophilic macromolecular drugs. Within this study, hydrophobic ion pairs (HIP) between salmon calcitonin (sCT) and highly lipophilic sulfosuccinate counterions were formed and compared to frequently applied commercially available counterions. Bis(isotridecyl) sulfosuccinate resulted in HIPs of the highest lipophilicity and in significantly higher solubility in lipophilic co-solvents. Thus, bis(isotridecyl) sulfosuccinate allowed efficient solubilization of sCT in a SEDDS preconcentrate based on a lipophilic co-solvent and an indigestible lipid, but omitting hydrophilic co-solvents. In addition to the increased solubility in the lipidic matrix, markedly reduced dissociation in biorelevant media resulted in high distribution coefficients between oil droplet and FaSSGF or FaSSIF (logD) of 2.98 +/- 0.12 or 2.77 +/- 0.14, respectively. The composition of the lipidic matrix preserved integrity of the oil droplets after emulsification and subsequent lipolysis, allowing to fully exploit the potential of the HIP attributed to the high logD. Oral administration of the HIP-loaded SEDDS resulted in an excellent relative pharmacological activity of 13.8 +/- 5.6 % measured as hypocalcaemic effect in rats.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据