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Tytuł artykułu

Gemini [dimeric] surfactant perturbation of the human erythrocyte

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
We studied the ability of di-cationic gemini surfactantsdi (amphiphiles), i.e. 1,4-butanediammonium-N,N-dialkyl-N,N,N',N'-tetramethyl bromides (Di-Cm-di-QAS (s = 4), where m = 8,11,13,16 and s = the number of alkyl groups in the spacer) to induce shape alteration, vesiculation, haemolysis and phosphatidylserine exposure in human erythrocytes, and to protect erythrocytes against hypotonic haemolysis. At high sublytic concentrations the Di-Cm-di-QAS (s = 4) amphiphiles rapidly induced echinocytic (spiculated) shapes and a release of exovesicles, mainly in the form of tubes, from the cell surface. Following 60 min incubation erythrocytes were sphero-echinocytic and a few cells with invaginations/endovesicles were observed. No phosphatidylserine exposure was detected. The haemolytic potency increased with an increase of the alkyl chain length. At sublytic concentrations the Di-Cm-di-QAS (s = 4) amphiphiles protected erythrocytes against hypotonic haemolysis. It is suggested that the Di-Cm-di-QAS (s = 4) amphiphiles perturb the membrane in a similar way as single-chain cationic amphiphiles, but that they do not easily translocate to the inner membrane leaflet.

Wydawca

-

Rocznik

Tom

47

Numer

3

Opis fizyczny

p.651-660,fig.

Twórcy

  • Comenius University, Bratislava, Slovakia
autor

Bibliografia

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  • 4. Danino, D., Talmon, Y. & Zana, R. (1995) Alkanediyl-alpha,w-bis(dimethylalkylammonium bromide) amphiphiles (dimeric amphiphiles). 5. Aggregation and microstructure in aqueous solutions. Langmuir 11, 1448-1456.
  • 5. Danino, D., Talmon, Y. & Zana, R. (1997) Vesicle-to-micelle transformation in systems containing dimeric amphiphiles. J. Coll. Interf. Sci. 185, 84-93.
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  • 12. Frindi, M., Michelis, B., Levy, H. & Zana, R. (1994) Alkanediyl-alpha,w-bis(dimethylalkylammonium bromide) amphiphiles. 4. Ultrasonic absorption studies of amphiphile exchange between micelles and bulk phase in aqueous micellar solutions. Langmuir 10, 1140-1145.
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Bibliografia

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