Won-Jin Kim

Contact guidance can promote cell alignment and is thus widely employed in tissue regeneration. In particular, skeletal muscle consists of long fibrous bundles of multinucleated myotubes formed by the fusion and differentiation of the satellite cells of myoblasts. Herein, a functional bioink and cell-printing process supplemented with an electric field are proposed for obtaining highly aligned myoblasts in a collagen-based bioink. To achieve the goal, we mixed Au nanowires (GNWs) with the collag

Abstract In the human body, microfibril structures can be found in several types of tissue, such as muscles, nerves, and even tendons. However, most micropatterned fabrication methods have focused on 2D surface patterned configurations, which imitate the alignment and fusion of cardiac and skeletal muscle cells. Despite the development of these 2D methods, it has continued to be a challenge to fabricate realistic 3D microfibril structures. The goal of this study is to develop a micropatterned po

To successfully achieve the porous cell-blocks, a bioink is a prerequisite requirement. However, although various hydrogel-based bioinks have been applied, a hydrogel/bioceramic-based composite bioink consisting of cells has not been actively investigated owing to its poor printability and low initial cell-viability. In this study, a new bioink consisting of fibrillated collagen, cells, and bioceramic (β-TCP) is suggested to attain a 3D porous cell-laden composite structure with high cellular re

The human intestine, a vital organ in our digestive system, shows an anatomically complex architecture. The fabrication of three-dimensional (3D) intestinal models containing villus structures has been an important topic for intestine regeneration or organ-on-a-chip, because a 3D model can provide broad surface area and help absorption and transportation of digested nutrients. In this study, we developed a 3D intestinal villi model containing an epithelium layer and a blood capillary structure,

The surface of the small intestine has a finger-like microscale villus structure, which provides a large surface area to realize efficient digestion and absorption. However, the fabrication of a villus structure using a cell-laden bioink containing a decellularized small intestine submucosa, SIS, which can induce significant cellular activities, has not been attempted owing to the limited mechanical stiffness, which sustains the complex projective finger-like 3D structure. In this work, we devel

Abstract Electric field stimulation has supported biophysical and biological cues for tissue regeneration approaches to affect cell morphology, alignment, and even cellular phenotypes types. Here, an innovative bioprinting approach supported by in situ electrical stiumlation (E‐printing) is used to fabricate a bioengineered skeletal muscle construct composed of human adipose stem cells and methacrylated decellularized extracellular matrix (dECM‐Ma) derived from porcine muscle. To obtain highly o

In bone tissue engineering, efficient formation of vascularized bone tissue is a challenging issue. Here, we introduce a new strategy for effectively using multiple cells laden in a hybrid structure, such as endothelial cell (EC) spheroids and homogeneously distributed human adipose stem cells (hASCs) for bone regeneration. <b>Methods:</b> To fabricate the EC spheroids, cell-mixed mineral oil was used, and microscale droplets of the cell mixture were interlayered between the bioprinted hASC-lade

Strong demands for high resolution video services lead to active studies on high speed video processing. Especially, widespread deployment of multi-core systems accelerates researches on high resolution video processing based on parallelization of multimedia software. In this paper, we propose a novel parallel H.264/AVC decoding scheme on a homogeneous multi-core platform. Parallelization of H.264/AVC decoding is challenging not only because parallelization may incur significant synchronization