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https://www.selleckchem.com/products/10074-g5.html The physical-chemical characteristics of the hybrid bioink compositions have been evaluated to determine the desired 3D bioprinting structure. Cytotoxicity and chondrogenic differentiation were also assessed to confirm that the double cross-linked HBSAC hydrogel scaffold was useful for chondrogenic formation. The results showed that partially crosslinking the biotinylated HA-based hydrogel with streptavidin has a significant effect on printability and structural integrity. Morphological analysis of a suitable 3D printed HBSAC hydrogel scaffold showed visible pores with the desired shape and geometry. We have concluded that the HBSAC hydrogel possesses a favorable biocompatibility profile. The HBSAC hydrogel can also secrete significantly higher amounts of chondrogenic marker genes at day 5 and sulfated glycosaminoglycans (sGAGs) from days 7 to 14 compared to the HA hydrogel, as determined via quantitative real-time PCR assay and Alcian blue staining and the DMMB assay.Zinc oxide (ZnO) nanostructures have been widely studied in biomedical fields due to their special properties. In recent years, ZnO spherical nanoparticles (SNPs) with nano-size as an anti-tumor agent have been widely concerned. While the effects of the non-spherical shaped ZnO nanoparticles on tumor cell death have been rarely reported. Here, we prepared ZnO spiky nanoparticles (SPNPs) as the research subject. We found that the SPNPs showed superiority in killing tumor cells. To be specific, SPNPs presented a long-term cytotoxicity effect on killing tumor cells, as plenty of SPNPs retained on the cell plasma membrane's exterior and still showed toxicity effect on tumor cells after co-incubation multiple times. Moreover, compared to SNPs, it was encouraging that SPNPs still showed stronger cytotoxicity in both simulated circulatory systems of tumor cells and 3D tumor cell spheroids. The stronger toxicity against tumor cells suggested that ZnO SPNPs hav

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