Spectroscopic studies of D-alpha-tocopherol concentration-induced transformation in egg phosphatidylcholine vesicles

• Autorzy: Dwiecki K , Gornas P. , Wilk A. , Nogala-Kalucka M. , Polewski K.
• Języki publikacji: EN

Abstrakty

EN

The effects of embedding up to 60 mol% of α-tocopherol (α-Toc) on the morphology and structure of the egg phosphatidylcholine (PC) membrane were studied using spectroscopic techniques. The resulting vesicles were subjected to turbidometric and dynamic light scattering measurements to evaluate their size distribution. The α-Toc intrinsic fluorescence and its quenching was used to estimate the tocopherol position in the membrane. Optical microscopy was used to visualize morphological changes in the vesicles during the inclusion of tocopherol into the 2 mg/ml PC membrane. The incorporation of up to 15 mol% of tocopherol molecules into PC vesicles is accompanied by a linear increase in the fluorescence intensity and the simultaneous formation of larger, multilamellar vesicles. Increasing the tocopherol concentration above 20 mol% induced structural and morphological changes leading to the disappearance of micrometer-sized vesicles and the formation of small unilamellar vesicles of size ranging from 30 to 120 nm, mixed micelles and non-lamellar structures.

Słowa kluczowe

EN

vitamin E; structure; acrylamide; morphology; vesicle; optical microscopy; egg; D-alpha-tocopherol; fluorescence; membrane; dynamic light scattering; tocopherol; spectroscopy; phosphatidylcholine

• Wydawca: -
• Czasopismo: Cellular and Molecular Biology Letters
• Rocznik: 2007
• Tom: 12
• Numer: 1
• Opis fizyczny: p.51-69,fig.,ref.

Twórcy

autor

Dwiecki K

• August Cieszkowski Agricultural University, Wojska Polskiego 38/42, 60-637 Poznan, Poland

autor

Gornas P.

autor

Wilk A.

autor

Nogala-Kalucka M.

autor

Polewski K.

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