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Endowment","award":["YXY2302010"],"award-info":[{"award-number":["YXY2302010"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Gels"],"abstract":"<jats:p>Intervertebral disc degeneration (IVDD) is a worldwide disease that causes low back pain and reduces quality of life. Biotherapeutic strategies based on tissue engineering alternatives, such as intervertebral disc scaffolds, supplemented by drug-targeted therapy have brought new hope for IVDD. In this study, to explore the role and mechanism of MnO2\/GelMA composite hydrogels in alleviating IVDD, we prepared composite hydrogels with MnO2 and methacrylate gelatin (GelMA) and characterized them using compression testing and transmission electron microscopy (TEM). Annulus fibrosus cells (AFCs) were cultured in the composite hydrogels to verify biocompatibility by live\/dead and cytoskeleton staining. Cell viability assays and a reactive oxygen species (ROS) probe were used to analyze the protective effect of the composite hydrogels under oxidative damage. To explore the mechanism of improving the microenvironment, we detected the expression levels of antioxidant and autophagy-related genes and proteins by qPCR and Western blotting. We found that the MnO2\/GelMA composite hydrogels exhibited excellent biocompatibility and a porous structure, which promoted cell proliferation. The addition of MnO2 nanoparticles to GelMA cleared ROS in AFCs and induced the expression of antioxidant and cellular autophagy through the common SIRT1\/NRF2 pathway. Therefore, the MnO2\/GelMA composite hydrogels, which can improve the disc microenvironment through scavenging intracellular ROS and resisting oxidative damage, have great application prospects in the treatment of IVDD.<\/jats:p>","DOI":"10.3390\/gels10050333","type":"journal-article","created":{"date-parts":[[2024,5,15]],"date-time":"2024-05-15T03:35:55Z","timestamp":1715744155000},"page":"333","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["The MnO2\/GelMA Composite Hydrogels Improve the ROS Microenvironment of Annulus Fibrosus Cells by Promoting the Antioxidant and Autophagy through the SIRT1\/NRF2 Pathway"],"prefix":"10.3390","volume":"10","author":[{"given":"Bohan","family":"Xu","sequence":"first","affiliation":[{"name":"Medical 3D Printing Center, Orthopedic Institute, School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-2383-9446","authenticated-orcid":false,"given":"Mingxuan","family":"Huang","sequence":"additional","affiliation":[{"name":"Medical 3D Printing Center, Orthopedic Institute, School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiaying","family":"Li","sequence":"additional","affiliation":[{"name":"Medical 3D Printing Center, Orthopedic Institute, School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qingchen","family":"Meng","sequence":"additional","affiliation":[{"name":"Medical 3D Printing Center, Orthopedic Institute, School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215000, 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