Cartilage repair techniques have been among the most intensively investigated treatments in orthopedics for the past decade, and several different treatment modalities are currently available. Despite the extensive research effort within this field, the generation of hyaline cartilage remains a considerable challenge. There are many parameters attendant to each of the cartilage repair technique...

Drug metabolism studies and liver tissue engineering necessitate stable hepatocyte cultures that express liver functions for a minimum of 4 days to 3 weeks. Current techniques, using different biomaterials and geometries, that maintain hepatocellular function in vitro exhibit a low cell density and functional capacity per unit volume. Herein we investigated a well-defined synthetic peptide that...

Apolipoprotein A-I (apoA-I) and an apoA-I peptide mimetic removed seeding molecules from human low density lipoprotein (LDL) and rendered the LDL resistant to oxidation by human artery wall cells. The apoA-I-associated seeding molecules included hydroperoxyoctadecadienoic acid (HPODE) and hydroperoxyeicosatetraenoic acid (HPETE). LDL from mice genetically susceptible to fatty streak lesion form...

In this paper, we report on the development of a multilayer elastomeric microfluidic array platform for the high-throughput cell cytotoxicity screening of mammalian cell lines. Microfluidic channels in the platform for cell seeding are orthogonal to channels for toxin exposure, and within each channel intersection is a circular chamber with cell-trapping sieves. Integrated, pneumatically-actuat...

The in vitro growth of pre-osteoblasts in multi-layer, three-dimensional scaffolds was determined from experimental measurements and was compared to a mathematical model. Immediately following cell seeding, the initial cell density was uniform throughout the scaffold. After 10 days, the cell density increased from 2.1 x 10(5) cells/cm(3) to 1.3 x 10(7) cells/cm(3) at the fluid-scaffold interfac...

Introduction Differentiated chondrocytes have been widely employed in studies of cartilage regeneration and tissue engineering. However, the low cell density of cartilage poses the problem of low cell yield following isolation for direct seeding onto scaffolds. To overcome this problem, chondrocytes are usually expanded in monolayer cell culture before seeding on any scaffold. This approach int...