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2016 ; 62
(4
): 447-53
Nephropedia Template TP
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Point-of-Care Rapid-Seeding Ventricular Assist Device with Blood-Derived
Endothelial Cells to Create a Living Antithrombotic Coating
#MMPMID26809085
Noviani M
; Jamiolkowski RM
; Grenet JE
; Lin Q
; Carlon TA
; Qi L
; Jantzen AE
; Milano CA
; Truskey GA
; Achneck HE
ASAIO J
2016[Jul]; 62
(4
): 447-53
PMID26809085
show ga
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/cm 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.