Point-of-Care Rapid-Seeding Ventricular Assist Device with Blood-Derived Endothelial Cells to Create a Living Antithrombotic Coating
| Autor: | Justin E. Grenet, Carmelo A. Milano, Hardean E. Achneck, Ryan M. Jamiolkowski, George A. Truskey, Tim A. Carlon, Qiuyu Lin, Alexandra E. Jantzen, Maria Noviani, Le Qi |
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| Rok vydání: | 2016 |
| Předmět: |
Point-of-Care Systems
medicine.medical_treatment 0206 medical engineering Cell Biomedical Engineering Biophysics Bioengineering 02 engineering and technology 030204 cardiovascular system & hematology Thrombomodulin Article Nitric oxide Biomaterials 03 medical and health sciences chemistry.chemical_compound Platelet Adhesiveness 0302 clinical medicine Antithrombotic medicine Humans Cells Cultured Titanium Heart transplantation business.industry technology industry and agriculture Endothelial Cells Thrombosis General Medicine Fetal Blood equipment and supplies medicine.disease 020601 biomedical engineering Endothelial stem cell medicine.anatomical_structure chemistry Heart-Assist Devices business Ex vivo Biomedical engineering |
| Zdroj: | ASAIO Journal. 62:447-453 |
| ISSN: | 1058-2916 |
| DOI: | 10.1097/mat.0000000000000351 |
| Popis: | The most promising alternatives to heart transplantation are left ventricular assist devices and artificial hearts; however, their use has been limited by thrombotic complications. To reduce these, sintered titanium (Ti) surfaces were developed, but thrombosis still occurs in approximately 7.5% of patients. We have invented a rapid-seeding technology to minimize the risk of thrombosis by rapid endothelialization of sintered Ti with human cord blood-derived endothelial cells (hCB-ECs). Human cord blood-derived endothelial cells were seeded within minutes onto sintered Ti and exposed to thrombosis-prone low fluid flow shear stresses. The hCB-ECs adhered and formed a confluent endothelial monolayer on sintered Ti. The exposure of sintered Ti to 4.4 dynes/cm2 for 20 hr immediately after rapid seeding resulted in approximately 70% cell adherence. The cell adherence was not significantly increased by additional ex vivo static culture of rapid-seeded sintered Ti before flow exposure. In addition, adherent hCB-ECs remained functional on sintered Ti, as indicated by flow-induced increase in nitric oxide secretion and reduction in platelet adhesion. After 15 day ex vivo static culture, the adherent hCB-ECs remained metabolically active, expressed endothelial cell functional marker thrombomodulin, and reduced platelet adhesion. In conclusion, our results demonstrate the feasibility of rapid-seeding sintered Ti with blood-derived hCB-ECs to generate a living antithrombotic surface. |
| Databáze: | OpenAIRE |
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