Amyloid β (Aβ) species are considered as potential targets for the development of diagnostics/therapeutics towards Alzheimer’s disease (AD). Nanoliposomes which are decorated with molecules having high affinity for Aβ species may be considered as potential carriers for AD theragnostics. Herein, benzothiazolyl (BTH) decorated nanoliposomes were prepared for the first time, after synthesis of a lipidic BTH derivative (lipid-BTH). The synthetic pathway included acylation of bis(2-aminophenyl) disulfide with palmitic acid or palmitoyl chloride and subsequent reduction of the oxidized dithiol derivative. The liberated thiols were able to cyclize to the corresponding benzothiazolyl derivatives only after acidification of the reaction mixture. Each step of the procedure was monitored by HPLC analysis in order to identify all the important parameters for the formation of the BTH-group. Finally, the optimal methodology was identified, and was applied for the synthesis of the lipid-BTH derivative. BTH-decorated nanoliposomes were then prepared and characterized for physicochemical properties (size distribution, surface charge, physical stability, and membrane integrity during incubation in presence of buffer and plasma proteins). Pegylated BTH-nanoliposomes were demonstrated to have high integrity in the presence of proteins (in comparison to non-peglated ones) justifying their further exploitation as potential theragnostic systems for AD.
淀粉样蛋白β(Aβ)物种被认为是阿尔茨海默病(AD)诊断/治疗的潜在靶点。装饰有高亲和力分子的纳米脂质体可能被视为AD治疗的潜在载体。在此,首次制备了苯噻唑基(BTH)装饰的纳米脂质体,经合成脂质BTH衍生物(脂质-BTH)后。合成途径包括用棕榈酸或棕榈酰氯酰化双(2-氨基苯基)二硫化物,然后还原氧化的二硫衍生物。在酸化反应混合物后,游离的硫醇能够环化为相应的苯噻唑基衍生物。为了确定形成BTH基团的所有重要参数,每个步骤都通过HPLC分析进行监测。最终,确定了最佳方法,并应用于合成脂质-BTH衍生物。然后制备了BTH装饰的纳米脂质体,并对其物理化学性质(尺寸分布、表面电荷、在缓冲液和血浆蛋白存在下孵育期间的物理稳定性和膜完整性)进行了表征。证明了聚乙二醇化的BTH-纳米脂质体在蛋白质存在下具有较高的完整性(与非聚乙二醇化的相比),从而证明它们进一步作为AD潜在治疗系统的可行性。