[Erythrocyte hemolysis by detergents--a mathematical model and analysis of the concentration and kinetic curves]. / Gemoliz éritrotsitov detergentami--matematicheskaia model' i analiz kontsentratsionnykh i kineticheskikh krivykh.

A mathematical model of erythrocyte lysis by detergents is developed which takes into consideration the kinetics of detergent binding to plasma membrane. Experimentally obtained sigmoidal kinetic and concentration curves of hemolysis are well described by the model. A comparative study is carried out in terms of the model of hemolytic action for five detergents: Triton X-100, sodium dodecylsulfate, sodium deoxycholate, cetyltrimethylammonium bromide, and cetylpyridinium chloride. The amount of detergent which should be bound to an erythrocyte membrane to induce lysis was found to be roughly the same for all detergents studied. However, detergents vary in their affinity to the membrane. Cetylpyridinium displays the highest affinity (and consequently the highest hemolytic activity), whereas deoxycholate has the least one.

[Intercellular interactions as a reason for the influence of the erythrocyte concentration on the parameters of detergent hemolysis]. / Mezhkletochnye vzaimodeistviia kak prichina vliianiia kontsentratsii éritrotsitov na parametry gemoliza detergentami.

Possible reasons are discussed for the abnormal erythrocyte concentration influence on the course of detergent hemolysis curves. The data obtained lead to a conclusion that erythrocyte plasma membrane properties and, as a consequence, the parameters of erythrocyte-detergent interaction are dependent on cell concentration. The dependence is more sharply expressed for concentrations 5.10(7) cell/ml. In the concentration range (5-20) X 10(7) cell/ml the state of erythrocyte membrane remains apparently unchanged.