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Article type: Research Article
Authors: Engström, K. Gunnar
Affiliations: Department of Histology and Cell Biology, University of Umeå, S-901 87 Umeå, Sweden
Note: [] Accepted by: Editor T. Laurent
Abstract: A new filtration device and blood handling technique for the assessment of RBC deformability in small blqod samples is described and used to study RBC deformability in adult obese-hyperglycemic ob/ob-mice and normoglycemic controls. The new filtration device was designed to improve the time resolution during RBC incubation. Test and control RBC suspensions were directly filtered from two identical incubation chambers under a constant pressure of 1200 Pa. Nuclepore filters (3 μm) were mounted on top of several standard test tubes into which the filtrate was subsequently collected and weighed. Because the RBCs were resuspended to a very low (0.01 %) hematocrit, the average number of RBCs passing each pore was less than 10. Therefore, any detectable difference must reflect the physical properties of RBCs, e.g. shape or viscoelasticity, whereas the role of white blood cells is negligible. When ob/ob-mouse RBCs were studied with the new technique they showed impaired filtrability as compared with control RBCs, both when incubated without glucose and with glucose present at the same concentration as that recorded in the RBC donating mouse.
Keywords: hemorheology, erythrocyte deformability, RBC filtrability, diabetes mellitus, obese-hyperglycemic mice
DOI: 10.3233/BIR-1989-26404
Journal: Biorheology, vol. 26, no. 4, pp. 711-721, 1989
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