Compositions of α-tocopheryl acetate with micellar nanocarriers and their possible use as biologically active additives.

Autor: Permyakova, N. M., Zheltonozhskaya, T. B., Karpovsky, V. I., Postoy, R. V., Maksin, V. I., Partsevskaya, S. V., Grishchenko, L. N., Klymchuk, D. O., Klepko, V. V.
Zdroj: Applied Nanoscience; Apr2022, Vol. 12 Issue 4, p1295-1313, 19p
Abstrakt: Double hydrophilic diblock copolymers based on asymmetric chemically complementary methoxypoly(ethylene oxide) and poly(acrylic acid) formed special micellar structures of the "cut" and "hairy" types with a complex "core" in aqueous solutions at pH < 5. These micelles have proven to be very effective, non-toxic, biocompatible, and biodegradable nanocarriers for the delivery of a poorly soluble vitamin E analogue, α-tocopheryl acetate, to sows and piglets. The obtained compositions of α-tocopheryl acetate with both types of micellar carriers showed high stability over time in a wide range of pH 3.5–9.0 and in physiological solution. However, in the case of "hairy" micelles, the developed "corona" of longer unbound segments of the polyacrylic acid block provided more reliable protection of the encapsulated drug molecules from the "salting-out" effect. The gradual release of the vitamin E analogue from both micellar nanocarriers into the aqueous and aqueous/salt medium under the action of the concentration gradient of α-tocopheryl acetate has been proved. The rate and efficiency of drug release were determined by the structure, morphology and stability of micellar carriers, as well as by the nature of the environment. The composition of α-tocopheryl acetate with one of the nanocarriers was tested in vivo on a group of sows as a dietary supplement. The positive effect of the micellar form of the drug on metabolic processes in sows, as well as on increasing the productivity of sows, stress resistance and safety of born piglets has been established. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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