Microfluidic capillary networks are more sensitive than ektacytometry to the decline of red blood cell deformability induced by storage

被引:21
|
作者
Piety, Nathaniel Z. [1 ,3 ]
Stutz, Julianne [1 ]
Yilmaz, Nida [1 ]
Xia, Hui [1 ]
Yoshida, Tatsuro [2 ]
Shevkoplyas, Sergey S. [1 ]
机构
[1] Univ Houston, Dept Biomed Engn, 3605 Cullen Blvd, Houston, TX 77204 USA
[2] Hemanext, Lexington, MA USA
[3] Vanderbilt Univ, Dept Chem, Nashville, TN USA
关键词
D O I
10.1038/s41598-020-79710-3
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Ektacytometry has been the primary method for evaluating deformability of red blood cells (RBCs) in both research and clinical settings. This study was designed to test the hypothesis that the flow of RBCs through a network of microfluidic capillaries could provide a more sensitive assessment of the progressive impairment of RBC deformability during hypothermic storage than ektacytometry. RBC units (n=9) were split in half, with one half stored under standard (normoxic) conditions and the other half stored hypoxically, for up to 6 weeks. RBC deformability was measured weekly using two microfluidic devices, an artificial microvascular network (AMVN) and a multiplexed microcapillary network (MMCN), and two commercially available ektacytometers (RheoScan-D and LORRCA). By week 6, the elongation indexes measured with RheoScan-D and LORRCA decreased by 5.8-7.1% (5.4-6.9% for hypoxic storage). Over the same storage duration, the AMVN perfusion rate declined by 27.5% (24.5% for hypoxic) and the MMCN perfusion rate declined by 49.0% (42.4% for hypoxic). Unlike ektacytometry, both AMVN and MMCN measurements showed statistically significant differences between the two conditions after 1 week of storage. RBC morphology deteriorated continuously with the fraction of irreversibly-damaged (spherical) cells increasing significantly faster for normoxic than for hypoxic storage. Consequently, the number of MMCN capillary plugging events and the time MMCN capillaries spent plugged was consistently lower for hypoxic than for normoxic storage. These data suggest that capillary networks are significantly more sensitive to both the overall storage-induced decline of RBC deformability, and to the differences between the two storage conditions, than ektacytometry.
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页数:11
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