{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T19:42:26Z","timestamp":1790624546713,"version":"4.1.0"},"reference-count":57,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T00:00:00Z","timestamp":1783728000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Italian Ministry of University and Research","award":["2014IT16M2OP005"],"award-info":[{"award-number":["2014IT16M2OP005"]}]},{"name":"European Social Fund (ESF) REACT-EU"},{"id":[{"id":"https:\/\/ror.org\/048snh465","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JFB"],"abstract":"<jats:p>The development of reusable and biocompatible biomaterial-based culture substrates is increasingly relevant for improving sustainability in biomedical research workflows. In this study, polyethylene terephthalate glycol-modified (PETG) was evaluated as a potential alternative to conventional polystyrene (PS) for in vitro cell culture applications. PETG substrates were fabricated through laser cutting and tested for their ability to support cell adhesion, viability, proliferation, and lineage-specific differentiation across multiple human cell models, including calvarial mesenchymal stromal cells (CMSCs), bone marrow-derived mesenchymal stromal cells (hBM-MSCs), dermal fibroblasts, LHCN-M2 myoblasts, and SH-SY5Y neuroblastoma cells. Morphological and immunofluorescence analyses demonstrated that PETG supported cell attachment and focal adhesion formation, comparable to standard PS surfaces. Cell viability and proliferation assays confirmed metabolic activity and growth over time. Furthermore, PETG substrates supported osteogenic, adipogenic, myogenic, and neuronal differentiation, as demonstrated by histological staining, myotube formation, neurite outgrowth, and lineage-specific gene expression analyses. Finally, PETG maintained CMSC morphology and metabolic activity after repeated recovery, ethanol\/UV treatment, and gelatin re-coating, with comparable results between new substrates and those reused for up to three cycles. These findings support PETG as a biocompatible culture substrate with preliminary short-term reuse potential and possible sustainability benefits for laboratory workflows.<\/jats:p>","DOI":"10.3390\/jfb17070336","type":"journal-article","created":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T08:05:31Z","timestamp":1783929931000},"page":"336","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Polyethylene Terephthalate Glycol-Modified (PETG) as a Reusable and Biocompatible Substrate for Cell Culture Applications"],"prefix":"10.3390","volume":"17","author":[{"given":"Alessia","family":"Vita","sequence":"first","affiliation":[{"name":"Dipartimento Scienze Della Vita e Sanit\u00e0 Pubblica, Universit\u00e0 Cattolica del Sacro Cuore, Largo F. 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