title: Dipyridamole increases human red blood cell deformability.
abstract: An automated filtration technique has been used to investigate the effect of dipyridamole (DP) on red blood cell deformability in patients identified as having rigid red cells. They were patients on haemodialysis (HD) for chronic renal failure (n = 18), patients with peripheral vascular disease (PVD, n = 23) and controls (hospital outpatients, n = 33). Leucocytes and platelets were removed from heparinised blood by filtration through Imugard wool. Washed red cell suspensions in buffer at 5% haematocrit, without or with 5 microM DP, were filtered through Nuclepore Hemafil Membranes with 4.7 microns pores. The initial steady state relative filtration pressure (iRFP) was used to assess cell deformability. A low iRFP value reflects increased deformability and vice versa. The mean iRFP values were 0.33, 0.393 and 0.403 for controls, PVD and HD patients respectively, indicating that the red cells in the two groups of patients were significantly more rigid. DP reduced the iRFP to 0.266, 0.278 and 0.263 for controls, PVD and HD patients respectively. The results suggest that DP may be beneficial when red cell rigidity contributes to impaired microvascular perfusion.
authors.affiliation: Institute of Biomedical Sciences, Terumo Shonan Centre, Kanagawa, Japan.
authors.forename: A R
authors.initials: AR
authors.lastname: Saniabadi
authors.forename: T C
authors.initials: TC
authors.lastname: Fisher
authors.forename: C S
authors.initials: CS
authors.lastname: Lau
authors.forename: A
authors.initials: A
authors.lastname: Bridges
authors.forename: J
authors.initials: J
authors.lastname: Taylor
authors.forename: J
authors.initials: J
authors.lastname: Belch
authors.forename: C D
authors.initials: CD
authors.lastname: Forbes
mesh_terms: D000328:Adult; D000368:Aged; D004176:Dipyridamole / Q000494:pharmacology*; D004907:Erythrocyte Deformability / Q000187:drug effects*; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000097:blood; D008297:Male; D008875:Middle Aged; D016491:Peripheral Vascular Diseases / Q000097:blood; D006435:Renal Dialysis
chemical_list: D004176:Dipyridamole