Jung, Youngmee Ji, HaYeun Chen, Zaozao Chan, Hon Fai Atchison, Leigh Klitzman, Bruce Truskey, George Leong, Kam W. 2024-01-20T06:01:31Z 2024-01-20T06:01:31Z 2021-09-04 2015-10-12 2045-2322 https://pubs.kist.re.kr/handle/201004/124895 Tissue-engineered blood vessels (TEBV) can serve as vascular grafts and may also play an important role in the development of organs-on-a-chip. Most TEBV construction involves scaffolding with biomaterials such as collagen gel or electrospun fibrous mesh. Hypothesizing that a scaffold-free TEBV may be advantageous, we constructed a tubular structure (1 mm i.d.) from aligned human mesenchymal cell sheets (hMSC) as the wall and human endothelial progenitor cell (hEPC) coating as the lumen. The burst pressure of the scaffold-free TEBV was above 200 mmHg after three weeks of sequential culture in a rotating wall bioreactor and perfusion at 6.8 dynes/cm(2). The interwoven organization of the cell layers and extensive extracellular matrix (ECM) formation of the hMSC-based TEBV resembled that of native blood vessels. The TEBV exhibited flow-mediated vasodilation, vasoconstriction after exposure to 1 mu M phenylephrine and released nitric oxide in a manner similar to that of porcine femoral vein. HL-60 cells attached to the TEBV lumen after TNF-alpha activation to suggest a functional endothelium. This study demonstrates the potential of a hEPC endothelialized hMSC-based TEBV for drug screening. English NATURE PUBLISHING GROUP DIAMETER VASCULAR GRAFTS ENDOTHELIAL-CELLS DRUG FLOW DISEASE ACTIVATION MECHANISMS BIOMARKERS TOXICITY ADHESION Scaffold-free, Human Mesenchymal Stem Cell-Based Tissue Engineered Blood Vessels Article 10.1038/srep15116 1 SCIENTIFIC REPORTS, v.5 SCIENTIFIC REPORTS 5 scie scopus 000362561900001 2-s2.0-84943745780 Multidisciplinary Sciences Science & Technology - Other Topics Article DIAMETER VASCULAR GRAFTS ENDOTHELIAL-CELLS DRUG FLOW DISEASE ACTIVATION MECHANISMS BIOMARKERS TOXICITY ADHESION