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The objective of this study was to investigate how the modification of hydrogel components influences the swelling, rheological attributes, and in vitro biocompatibility of the hydrogels. The hydrogels\u2019 networks were formed via free radical polymerization, as assured by 1H nuclear magnetic resonance spectroscopy (1H NMR). The swelling of the hydrogels directly correlated with the monomer and the catalyst amounts, in addition to the molecular weight of the monomer. Rheological analysis revealed that most of the synthesized hydrogels had viscoelastic and shear-thinning properties. The storage modulus and the viscosity increased by increasing the monomer and the crosslinker fraction but decreased by increasing the catalyst. MTT analysis showed no potential toxicity of the homopolymeric hydrogels, whereas the copolymeric hydrogels were toxic only at high DMEAM concentrations. The crosslinker polyethylene glycol dimethacrylate (PEGDMA) induced inflammation in ATDC5 cells, as detected by the significant increase in nitric oxide synthase type II activity. The results suggest a range of highly tunable homopolymeric and copolymeric hydrogels as candidates for cartilage regeneration.<\/jats:p>","DOI":"10.3390\/polym15244635","type":"journal-article","created":{"date-parts":[[2023,12,7]],"date-time":"2023-12-07T05:57:08Z","timestamp":1701928628000},"page":"4635","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Poly(ethylene Glycol) Methyl Ether Methacrylate-Based Injectable Hydrogels: Swelling, Rheological, and In Vitro Biocompatibility Properties with ATDC5 Chondrogenic Lineage"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1715-8157","authenticated-orcid":false,"given":"Yousof","family":"Farrag","sequence":"first","affiliation":[{"name":"Servizo Galego de Saude (SERGAS) and Instituto de Investigaci\u00f3n Sanitaria de Santiago (IDIS), Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases (NEIRID Group), Santiago University Clinical Hospital, Building C, Traves\u00eda da Choupana S\/N, 15706 Santiago de Compostela, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Djedjiga","family":"Ait Eldjoudi","sequence":"additional","affiliation":[{"name":"Servizo Galego de Saude (SERGAS) and Instituto de Investigaci\u00f3n Sanitaria de Santiago (IDIS), Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases (NEIRID Group), Santiago University Clinical Hospital, Building C, Traves\u00eda da Choupana S\/N, 15706 Santiago de Compostela, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mariam","family":"Farrag","sequence":"additional","affiliation":[{"name":"Servizo Galego de Saude (SERGAS) and Instituto de Investigaci\u00f3n Sanitaria de Santiago (IDIS), Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases (NEIRID Group), Santiago University Clinical Hospital, Building C, Traves\u00eda da Choupana S\/N, 15706 Santiago de Compostela, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8878-2219","authenticated-orcid":false,"given":"Mar\u00eda","family":"Gonz\u00e1lez-Rodr\u00edguez","sequence":"additional","affiliation":[{"name":"Servizo Galego de Saude (SERGAS) and Instituto de Investigaci\u00f3n Sanitaria de Santiago (IDIS), Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases (NEIRID Group), Santiago University Clinical Hospital, Building C, Traves\u00eda da Choupana S\/N, 15706 Santiago de Compostela, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7959-9826","authenticated-orcid":false,"given":"Clara","family":"Ruiz-Fern\u00e1ndez","sequence":"additional","affiliation":[{"name":"Servizo Galego de Saude (SERGAS) and Instituto de Investigaci\u00f3n Sanitaria de Santiago (IDIS), Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases (NEIRID Group), Santiago University 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and Inflammatory Diseases (NEIRID Group), Santiago University Clinical Hospital, Building C, Traves\u00eda da Choupana S\/N, 15706 Santiago de Compostela, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos","family":"Torrijos Pulp\u00f3n","sequence":"additional","affiliation":[{"name":"Servizo Galego de Saude (SERGAS) and Instituto de Investigaci\u00f3n Sanitaria de Santiago (IDIS), Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases (NEIRID Group), Santiago University Clinical Hospital, Building C, Traves\u00eda da Choupana S\/N, 15706 Santiago de Compostela, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rebeca","family":"Bouza","sequence":"additional","affiliation":[{"name":"Grupo de Pol\u00edmeros, Departamento de F\u00edsica y Ciencias de la Tierra, Escuela Universitaria Polit\u00e9cnica, Universidade da Coru\u00f1a, Serantes, Avda. 19 de Febrero s\/n, 15471 Ferrol, 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