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  • Title: Membrane transport of inositol by Hymenolepis diminuta (Cestoda).
    Author: Ip YK, Fisher FM.
    Journal: J Parasitol; 1982 Feb; 68(1):53-60. PubMed ID: 7077449.
    Abstract:
    The absorption of myoinositol by Hymenolepis diminuta involved diffusion that occurred at all substrate concentrations tested; at low substrate concentrations the mediated component predominated. The mediated process exhibited saturation kinetics with a Vmax and Kt of 0.011 mumoles/g of the ethanol-extracted dry wt/4 min and 0.0067 mM, respectively. Myoinositol transport was sensitive to changes in temperature, pH, and sodium ion concentration. D-Glucose was a noncompetitive inhibitor of myoinositol transport, but myoinositol had no effect on D-glucose absorption. Phlorizin interacted competitively with the myoinositol transport system. Various sugar alcohols and amino acids had no effect on myoinositol transport. These results indicate that a separate transport system exists in H. diminuta for myoinositol.
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