Jalandhra Gagan K, Hung Tzong-Tyng, Kilian Kristopher A
School of Materials Science and Engineering, UNSW Sydney, Sydney NSW 2052.
Australian Centre for NanoMedicine, UNSW Sydney, Sydney NSW 2052.
Adv Nanobiomed Res. 2024 Oct;4(10). doi: 10.1002/anbr.202400024. Epub 2024 Sep 11.
Microscale carriers have emerged as promising materials for nurturing cell growth and as delivery vehicles for regenerative therapies. Carriers based on hydrogels have proved advantageous, where "microgels" can be formulated to have a broad range of properties to guide the behavior of adherent cells. Here we demonstrate the fabrication of osteogenic microgels through incorporation of laponite nanoclays. Forming a jammed suspension provides a scaffolding where cells can adhere to the surface of the microgels, with pathways for migration and proliferation fostered by the interstitial volume. By varying the content and type of laponite-RD and XLG-the degree of osteogenesis can be tuned in embedded populations of adipose derived stem cells (ADSCs). The nano- micro-structured composite materials enhance osteogenesis at the transcript and protein level, leading to increased deposition of bone minerals and an increase in the compressive modulus of the assembled scaffold. Together, these microgel suspensions are promising materials for encouraging osteogenesis with scope for delivery via syringe injection and stabilization to bone-mimetic mechanical properties after matrix deposition.
微尺度载体已成为用于促进细胞生长的有前景的材料以及再生疗法的递送载体。基于水凝胶的载体已证明具有优势,其中“微凝胶”可以被制备成具有广泛的特性以引导贴壁细胞的行为。在这里,我们展示了通过掺入锂皂石纳米粘土来制造成骨微凝胶。形成一种堵塞悬浮液提供了一个支架,细胞可以附着在微凝胶的表面,间隙体积促进了迁移和增殖的途径。通过改变锂皂石-RD和XLG的含量和类型,可以在脂肪来源干细胞(ADSCs)的嵌入群体中调节成骨程度。这种纳米-微结构复合材料在转录和蛋白质水平上增强了成骨作用,导致骨矿物质沉积增加以及组装支架的压缩模量增加。总之,这些微凝胶悬浮液是用于促进成骨的有前景的材料,具有通过注射器注射递送的可能性以及在基质沉积后稳定到仿骨机械性能的潜力。