Abstract
Comparison of transintegumental membrane permeability and partition coefficients of selected nonelectrolytes attempted to correlate the parameters of lipid solubility and membrane permeation in male and female Schistosoma mansoni. Transintegumental uptakes and octanol:water partition coefficients were determined for 10 nonelectrolytes (acetamide, antipyrine, benzyl alcohol, caffeine, ethanol, ethylene glycol, propylene glycol, sucrose, thiourea, and urea). Linear regression analyses comparing the logarithm of the partition coefficient to the transintegumental uptakes yielded values of R = 0.80 ( P < 0.001) for males, R = 0.84 ( P < 0.001) for females, and R = 0.82 ( P < 0.001) for a combined analysis of males and females. The male and female schistosomes showed no statistically significant differences in correlation of these parameters. The evidence, then, suggests that the multilaminate membrane functions in a way similar to the function of a lipid bilayer with regard to the parameters studied.
Published Version
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