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On-Chip 3d Cell Culture Platform for Tumor Modeling and Drug Screening
(2022) Yıldırım, Özüm; Arslan Yıldız, Ahu
Citation - Scopus: 2
Bioprinting of Hydrogels for Tissue Engineering and Drug Screening Applications
(Elsevier, 2022) Özmen, Ece; Yıldırım, Özüm; Arslan Yıldız, Ahu
In tissue engineering, the 3-dimensional (3D) bioprinting method that enables the production of 3D structures by combining bioinks and cells has become one of the most promising technique. Over the last few years, 3D cell culture models gained importance in the development of disease model and drug development studies. The successful production of the 3D structures by 3D bioprinting mostly depends on the properties of the bioink to be used. Hydrogels, which are natural or synthetic polymers, are generally preferred as bioink materials with their high swelling ability, biocompatibility, biodegradability, and easy gelation ability. The convenience of hydrogels for varied bioprinting applications make them proper bioink materials for bioprinting of artificial tissues, tumor models, and tissue grafts. Bioprinting of functional tissues is successfully performed for years, and hydrogels are utilized as bioink in bone, vascular, neural, cartilage, cardiac, skin tissue engineering, and drug screening. In this chapter, bioprinting methodology, bioinks, hydrogel bioinks, and their applications are discussed in detail. © 2023 Elsevier Inc. All rights reserved.
Citation - WoS: 17
Citation - Scopus: 18
Development of a Hydrocolloid Bio-Ink for 3d Bioprinting
(Royal Society of Chemistry, 2022) Yıldırım, Özüm; Arslan Yıldız, Ahu
A new generation of bio-inks that are soft, viscous enough, stable in cell culture, and printable at low printing pressures is required in the current state of 3D bioprinting technology. Hydrogels can meet these features and can mimic the microenvironment of soft tissues easily. Hydrocolloids are a group of hydrogels which have a suitable gelling capacity and rheological properties. According to the literature, polysaccharide-based hydrocolloids are used in the food industry, wound healing technologies, and tissue engineering. Quince seed hydrocolloids (QSHs), which consist of mostly glucuronoxylan, can easily be obtained from quince seeds by water extraction. In this study, the use of a QSH as a bio-ink was investigated. The suitability of QSH for the printing process was assessed by rheological, uniformity and pore factor analyses. Appropriate printing parameters were determined and the characterization of the bioprinted QSHs was performed by SEM analysis, water uptake capacity measurement, and protein adsorption assay. The bioprinted QSHs had excellent water uptake capacity and showed suitable protein adsorption behaviour. Analyses of the biocompatibility and cellular viability of bioprinted QSHs were conducted using NIH-3T3 fibroblast cells and the results were found to be high during short and long-term cell culture periods. It was proved that QSH is a highly promising bio-ink for 3D bioprinting and further tissue engineering applications.
On-Chip 3d Cell Culture Platform for Tumor Modeling and Drug Screening
(Mary Ann Liebert, 2022) Yıldırım, Özüm; Arslan Yıldız, Ahu
Three-dimensional (3D) cell culture allows cell-cell and cellmatrix interactions and provides more in vivo like models rather than 2D cell culture which cannot fully mimic native tissue. 3D cell culture on microfluidics allows formation of 3D structures that mimic the physiological and chemical microenvironment for cells[1]. These microfluidic platforms also downsize bench-top laboratory to a microchip, require miniaturized reagent, and are convenient for dynamic drug screening[2]. In this study, a microfluidic platform was designed which is housing a PLLCL scaffold fabricated by electrospinning methodology.

Bioengineering / Biyomühendislik

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