Injectable Double Positively Charged Hydrogel Microspheres for Targeting‐Penetration‐Phagocytosis. Issue 40 (3rd September 2022)

• Record Type: Journal Article
• Authors: Lin, Jiawei; Chen, Liang; Yang, Jielai; Li, Xingchen; Wang, Juan; Zhu, Yuan; Xu, Xiangyang; Cui, Wenguo
• Is Part Of: Small. Volume 18:Issue 40(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-03
• Subjects: drug delivery -- hydrogel microspheres -- microfluidic technology -- osteoarthritis; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202202156
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: The localization and accumulation of drugs in the body determine their therapeutic effects; however, the specific microstructure of damaged tissues hinders drug delivery. Currently, there is a shortage of effective drug carriers to breach these barriers and achieve efficient tissue and cellular delivery of drugs. In this study, an injectable double positively charged functional hydrogel microsphere with "targeting cartilage extracellular matrix", "cartilage penetration", and "cellular phagocytosis" is designed for matching the structural characteristics of joints, addressing the difficulties of drug delivery in joints. The microspheres could be adsorbed on the negatively charged cartilage surface because of their positively charged poly‐lysine surface. Furthermore, the internally loaded positively charged polyamidoamine contained kartogenin, which helped further the penetration of the cartilage under the guidance of electrical charge. The microspheres could release kartogenin for more than 21 days. In in vivo experiments, the microspheres effectively improve the efficiency of drug delivery, inhibit the degradation of cartilage matrix and subchondral bone, and delay the development of osteoarthritis. As a double positively charged drug delivery system, the versatile microsphere has great potential for treating osteoarthritis and other diseases. Abstract : The injectable double positively charged hydrogel microspheres with surface positively charged poly‐lysine (PLL) and internally positively charged loaded polyamidoamine containing kartogenin are manufactured to achieve in situ drug delivery through charge‐targeted adsorption on the cartilage surface and penetration of the cartilage matrix, effectively improving the efficiency of drug delivery to the joint and the therapeutic effect of osteoarthritis.