Journal
POLYMER TESTING
Volume 80, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2019.106107
Keywords
Cellulose fiber; Hierarchical structure; Cancer cell; In vitro culture
Funding
- Key Project of Natural Science Foundation of Jiangxi Province [20161ACB20018]
- National Natural Science Foundation of China [31870963, 31660264, 51572187]
- Youth Science Foundation of Jiangxi Province [20181BAB216010]
- Science and Technology Research Project of Jiangxi Education Department [GJJ180348]
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Scaffolds combining nano- and submicro-fibers closely mimicking extracellular matrix (ECM) have been poorly exploited for in vitro cancer cell culture. Herein, a combined electrospinning and modified in situ biosynthesis method has been developed to fabricate a novel scaffold consisting of bacterial cellulose (BC) nanofibers and electrospun cellulose acetate (CA) submicrofibers to mimic the fibrillar structure of natural ECM. The CA/BC nano/submicrofibrous scaffold was characterized by scanning electron microscopy (SEM), mechanical strength tests, porosity measurements, and cell studies using the MCF-7 breast cancer cells. In addition, the sensitivity of the cancer cells seeded in the CA/BC nano/submicrofibrous scaffold to an anticancer drug was assessed. It was found that the CA/BC scaffold exhibited an interconnected porous structure in which BC nanofibers penetrated into the submicrofibrous CA scaffold. Such sophisticated structure was responsible for the improved mechanical properties of CA/BC scaffold over the ones obtained using a single kind of fibers. More importantly, the CA/BC scaffold showed improved cell adhesion, migration, and proliferation over single BC or CA scaffold. Finally, cells grown on CA/BC scaffold exhibited a greater doxorubicin resistance than those on single CA or BC scaffold. The results suggest that the CA/BC nano/submicrofibrous scaffold has potential for application in in vitro tumor model for the study of cancer progression and drug screening.
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