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Feedback-Controlled Release of Alendronate from Composite Microparticles

机译:来自复合微粒的反馈控制释放醛酸盐

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摘要

Extended bone fractures or fractures coexisting with bone disorders can lead to non-unions where surgical intervention is required. Composite drug delivery systems are being used increasingly more in order to treat such defects locally. Alendronate (ALD), a bisphosphonate extensively used in clinical practice to treat conditions, such as osteoporosis, has been shown to assist bone fracture healing through its antiresorptive capacity. This study reports the development of a polymeric composite system for the in situ delivery of ALD, which possesses enhanced encapsulation efficiency (EE%) and demonstrates controlled release over a 70-day period. ALD and calcium phosphate (CaP) were incorporated within poly (lactic-co-glycolic acid) (PLGA) microspheres, giving rise to a 70% increase in EE% compared to a control system. Finally, a preliminary toxicological evaluation demonstrated a positive effect of the system on pre-osteoblastic cells over 72 h.
机译:与骨紊乱共存的延长骨折或骨折可导致需要外科干预的非工会。复合药物递送系统正在越来越多地使用,以便在本地治疗这种缺陷。 Alendronate(ALD),广泛用于临床实践中的双膦酸盐,以治疗骨质疏松症,如骨质疏松症,通过其防射容量可以帮助骨折愈合。本研究报告了用于原位递送ALD的聚合物复合体系的开发,其具有增强的包封效率(EE%)并证明了70天的控制释放。磷酸盐和磷酸钙(帽)纳入聚(乳酸 - 共乙醇酸)(PLGA)微球中,与对照系统相比,EE%的增长70%。最后,初步毒理学评估证明了该系统对72小时内骨细胞细胞的积极作用。

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