Disaggregating shear stress: The roles of cell deformability and fibrinogen concentration

Shubin Xue, Byoung Kwon Lee, Sehyun Shin

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Red blood cell (RBC) aggregation is greatly affected by cell deformability and reduced deformability and increased RBC aggregation are frequently observed in hypertension, diabetes mellitus, and sepsis, thus measurement of both these parameters is essential. In this study, we investigated the effects of cell deformability and fibrinogen concentration on disaggregating shear stress (DSS). The DSS was measured with varying cell deformability and geometry. The deformability of cells was gradually decreased with increasing concentration of glutaraldehyde (0.001~0.005%) or heat treatment at 49.0°C for increasing time intervals (0~7 min), which resulted in a progressive increase in the DSS. However, RBC rigidification by either glutaraldehyde or heat treatment did not cause the same effect on RBC aggregation as deformability did. The effect of cell deformability on DSS was significantly increased with an increase in fibrinogen concentration (2~6 g/L). These results imply that reduced cell deformability and increased fibrinogen levels play a synergistic role in increasing DSS, which could be used as a novel independent hemorheological index to characterize microcirculatory diseases, such as diabetic complications with high sensitivity.

Original languageEnglish
Pages (from-to)231-240
Number of pages10
JournalClinical Hemorheology and Microcirculation
Volume55
Issue number2
DOIs
Publication statusPublished - 2013

Keywords

  • Aggregation
  • Deformability
  • Disaggregating shear stress
  • Fibrinogen
  • RBC

ASJC Scopus subject areas

  • Physiology
  • Hematology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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