Kinetics of erythrocyte swelling and membrane hole formation in hypotonic media

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Red blood cell (RBC) swelling and membrane hole formation in hypotonic external media were studied by measuring the time-dependent capacitance, C, and the conductance, G, in the beginning of the β-dispersion range. At high and moderate osmolarities of the external solution the capacitance reaches a steady-state whereas at low osmolarities it reveals a biphasic kinetics. Examination of RBC suspensions exposed to different concentrations of HgCl2 demonstrates that water transport through mercury-sensitive water channel controls RBC swelling. Unlike the capacitance, an increase in the conductance to a stationary level is observed after a certain delay. A comparison of G(t) curves recorded for the suspensions of the intact cells and those treated with cytochalasin B or glutaraldehyde demonstrates the significant effect of the membrane viscoelasticity on the pore formation. It is shown that the stretched membrane of completely swollen RBC retains its integrity for a certain time, termed as the membrane lifetime, tmemb. Therefore, the resistivity of RBCs to a certain osmotic shock may be quantified by the distribution function of RBC(tmemb).

Original languageEnglish
Pages (from-to)119-132
Number of pages14
JournalBiochimica et Biophysica Acta - Biomembranes
Volume1558
Issue number2
DOIs
StatePublished - 1 Feb 2002

Keywords

  • Capacitance/conductance
  • Hypotonic medium
  • Lysis
  • Red blood cell

Fingerprint

Dive into the research topics of 'Kinetics of erythrocyte swelling and membrane hole formation in hypotonic media'. Together they form a unique fingerprint.

Cite this