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    Co-loading of Temozolomide with Oleuropein or rutin into polylactic acid core-shell nanofiber webs inhibit glioblastoma cell by controlled release.
    (Elsevier B.V., 2023) Ercelik, Melis; Tekin, Cagla; Parın, Fatma Nur; Mutlu, Büşra; Doğan, Hazal Yılmaz; Tezcan, Gulcin; Aksoy, Secil Ak; Gurbuz, Melisa; Yıldırım, Kenan; Bekar, Ahmet; Kocaeli, Hasan; Taskapilioglu, Mevlut Ozgur; Eser, Pinar; Tunca, Berrin
    Glioblastoma (GB) has susceptibility to post-surgical recurrence. Therefore, local treatment methods are required against recurrent GB cells in the post-surgical area. In this study, we developed a nanofiber-based local therapy against GB cells using Oleuropein (OL), and rutin and their combinations with Temozolomide (TMZ). The polylactic acid (PLA) core-shell nanofiber webs were encapsulated with OL (PLA), rutin (PLA), and TMZ (PLA) by an electrospinning process. A SEM visualized the morphology and the total immersion method determined the release characteristics of PLA webs. Real-time cell tracking analysis for cell growth, dual Acridine Orange/Propidium Iodide staining for cell viability, a scratch wound healing assay for migration capacity, and a sphere formation assay for tumor spheroid aggressiveness were used. All polymeric nanofiber webs had core-shell structures with an average diameter between 133 ± 30.7-139 ± 20.5 nm. All PLA webs promoted apoptotic cell death, suppressed cell migration, and spheres growth (p < 0.0001). PLA and PLA suppressed GB cell viability with a controlled release that increased over 120 h, while PLA caused rapid cell inhibition (p < 0.0001). Collectively, our findings suggest that core-shell nano-webs could be a novel and effective therapeutic tool for the controlled release of OL and TMZ against recurrent GB cells.