Square prism micropillars on poly(methyl methacrylate) surfaces modulate the morphology and differentiation of human dental pulp mesenchymal stem cells

Use of soluble factors is the most common strategy to induce osteogenic differentiation of mesenchymal stem cells (MSCs) in vitro, but it may raise potential side effects in vivo. The topographies of the substrate surfaces affect cell behavior, and this could be a promising approach to guide stem cell differentiation. Micropillars have been reported to modulate cellular and subcellular shape, and it is particularly interesting to investigate whether these changes in cell morphology can modulate gene expression and lineage commitment without chemical induction. In this study, poly(methyl methacrylate) (PMMA) films were decorated with square prism micro pillars with different lateral dimensions (4, 8 and 16 mu m), and the surface wettability of the substrates was altered by oxygen plasma treatment. Both, pattern dimensions and hydrophilicity, were found to affect the attachment, proliferation, and most importantly, gene expression of human dental pulp mesenchymal stem cells (DPSCs). Decreasing the pillar width and interpillar spacing of the square prism pillars enhanced cell attachment, cell elongation, and deformation of nuclei, but reduced early proliferation rate. Surfaces with 4 or 8 mu m wide pillars/gaps upregulated the expression of early bone-marker genes and mineralization over 28 days of culture. Exposure to oxygen plasma increased wettability and promoted cell attachment and proliferation but delayed osteogenesis. Our findings showed that surface topography and chemistry are very useful tools in controlling cell behavior on substrates and they can also help create better implants. The most important finding is that hydrophobic micropillars on polymeric substrate surfaces can be exploited in inducing osteogenic differentiation of MSCs without any differentiation supplements.
Colloids and Surfaces B: Biointerfaces


Arid4b physically interacts with Tfap2c in mouse embryonic stem cells
Keskin, Ezgi Gul; Huang, Jialiang; Terzi Çizmecioğlu, Nihal (2021-01-01)
Precise regulation of gene expression is required for embryonic stem cell (ESC) differentiation. Transcription factor (TF) networks coordinate the balance of pluripotency and differentiation in response to extracellular and intracellular signals. Chromatin factors work alongside TFs to achieve timely regulation of gene expression for differentiation process. Our previous studies showed that a member of the Sin3a corepressor complex, Arid4b, is critical for proper mouse ESC differentiation into mesoderm and ...
Xenogenic Neural Stem Cell-Derived Extracellular Nanovesicles Modulate Human Mesenchymal Stem Cell Fate and Reconstruct Metabolomic Structure
DERKUŞ, BURAK; Isik, Melis; Eylem, Cemil Can; ERGİN, İREM; Camci, Can Berk; Bilgin, Sila; ELBÜKEN, ÇAĞLAR; ARSLAN, YAVUZ EMRE; Akkulak, Merve; Adalı, Orhan; KIRAN, FADİME; Okesola, Babatunde O.; NEMUTLU, EMİRHAN; EMREGÜL, EMEL (2022-03-01)
Extracellular nanovesicles, particularly exosomes, can deliver their diverse bioactive biomolecular content, including miRNAs, proteins, and lipids, thus providing a context for investigating the capability of exosomes to induce stem cells toward lineage-specific cells and tissue regeneration. In this study, it is demonstrated that rat subventricular zone neural stem cell-derived exosomes (rSVZ-NSCExo) can control neural-lineage specification of human mesenchymal stem cells (hMSCs). Microarray analysis show...
Investigation of the role of programmed cell death 10 (PDCD10) protein in multidrug resistance
Urfalı Mamatoğlu, Çağrı; Gündüz, Ufuk; Department of Biology (2018)
Drug resistance, a major obstacle in chemotherapy, is the sum of several cellular alterations including resistance to induction of apoptosis. Apoptosis is a well-regulated cell death mechanism which is controlled by several signaling pathways and a vast number of proteins. Alterations in the proteins involved in the apoptotic regulation have been associated with drug resistance in cancer. Programmed Cell Death 10 (PDCD10) protein is a novel apoptotic regulator that is recently linked to the modulation of ce...
Arid4b alters cell cycle and cell death dynamics during mouse embryonic stem cell differentiation.
Güven, Gözde; Terzi Çizmecioğlu, Nihal (2021-02-09)
Cell division and death play an important role in embryonic development. Cell specialization is accompanied with slow proliferation and quiescence. Cell death is important for morphogenesis. Gene expression changes during differentiation is coordinated by lineage-specific transcription factors and chromatin factors. It is not yet fully understood how alterations in gene expression and cell cycle/death mechanisms are connected. We previously identified a chromatin protein Arid4b as a critical factor for meso...
Regulatory gene effects on recombinant human growth hormone production by Bacillus subtilis
Şahin, Merve; Çalık, Pınar; Özdamar, Tunçer H.; Department of Chemical Engineering (2010)
In this study, regulatory gene effects on recombinant human growth hormone (rhGH) production by Bacillus subtilis were investigated. For this purpose, firstly Bacillus strains, which are deficient in abrB, aprE, degQ, degS, degU, scoC, sinI, sinR, and spo0A genes, were selected according to the regulatory gene network of aprE gene (serine alkaline protease gene of B. subtilis) since due to the degQ promoter and the pre-signal sequence of subC gene cloned in front of the hGH gene, hGH is produced by mimickin...
Citation Formats
O. Hasturk, M. Ermiş Şen, U. Demirci, N. Hasırcı, and V. N. Hasırcı, “Square prism micropillars on poly(methyl methacrylate) surfaces modulate the morphology and differentiation of human dental pulp mesenchymal stem cells,” Colloids and Surfaces B: Biointerfaces, pp. 44–55, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31040.