Fabrication of biocompatible polymeric carriers for sustained/controlled drug-delivery have been extensively explored over the years. Furthermore, systems based on polymers from natural origins exceed conventional polymers in biocompatibility, biodegradability and cost efficiency. Polysaccharides are one of the most common biopolymers found in nature and they can achieve a high degree of complexity and fine biological properties. Herein, is proposed a biodegradable and biocompatible microcarrier synthesized from laminarin, a low Mw marine polysaccharide based on glucose units with great biological activity, such as immune modulation and antimicrobial properties. Within this work, controlled size microparticles were obtained from novel modifications of laminarin. Microparticles showed 40% release of fluorescein isothiocyanate-dextran (70 kDa) after 24 h and full degradability after 11 days, when in physiological conditions. When incubated with human adipose stem and L929 cell lines (up to a microparticle concentration of 100 µg/mL) no cytotoxicity was perceived, and neither membrane or nucleus disturbance. Thus, microparticles synthesized from laminarin, proved to be a cost efficient, biocompatible and biodegradable system.
                                    多年来,人们对用于持续/可控给药的
生物相容性聚合物载体的制造进行了广泛的探索。此外,基于天然聚合物的系统在
生物相容性、
生物降解性和成本效益方面都超过了传统聚合物。
多糖是自然界中最常见的
生物聚合物之一,具有高度的复杂性和优良的
生物特性。层糖苷是一种基于
葡萄糖单元的低 Mw 海洋
多糖,具有很强的
生物活性,如免疫调节和抗菌特性。在这项工作中,通过对层皮糖苷进行新型改性,获得了尺寸可控的微颗粒。在生理条件下,微颗粒在 24 小时后可释放 40% 的异
硫氰酸荧光素-
葡聚糖(70 kDa),11 天后可完全降解。当与人脂肪干细胞和 L929 细胞株(微粒浓度最高为 100 µg/mL)培养时,未发现细胞毒性,也未发现细胞膜或细胞核受到干扰。因此,由层皮素合成的微颗粒被证明是一种具有成本效益、
生物相容性和可
生物降解的系统。