Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Effect of hydroxybutyric-acid on lipid bilayers with respect to layer phase

  • Lee, Gaeul (Department of Chemical and Biomolecular Engineering, College of Energy and Biotechnology, Seoul National University of Science and Technology) ;
  • Park, Jin-Won (Department of Chemical and Biomolecular Engineering, College of Energy and Biotechnology, Seoul National University of Science and Technology)
  • Received : 2022.09.21
  • Accepted : 2022.10.30
  • Published : 2022.10.30
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Abstract

The behavior changes of the lipid bilayer, induced by the hydroxybutyric-acid incorporation, were investigated with respect to each phase of the layer using fluorescence intensity change. Spherical phospholipid bilayers, called vesicles, were prepared using an emulsion technique. Only in the aqueous inside of the vesicles was encapsulated 8-Aminonaphthalene-1,3,6-trisulfonic-acid-disodium-salt(ANTS). p-Xylene-bis-N-pyridinium-bromide(DPX) was included as a quencher only outside of the vesicles. The fluorescence scale was calibrated with the ANTS-encapsulated vesicles in DPX-dispersed-buffer taken as 100% and the mixture of ANTS and DPX in the buffer as 0%. Hydroxybutyric-acid addition into the vesicle solution led the change in the bilayer. The change was found to be related to the phase of each layer according to the ratio of hydroxybutyric-acid to lipid. These results seem to depend on the stability of the vesicles, due to the osmotic and volumetric effects on the arrangement in both head-group and tail-group.

형광 강도 변화를 이용하여 세포막의 위상에 따른 하이드록시부티르산 혼입이 생체막에 미치는 영향을 조사하였다. 구형 인지질 이중층인 소포(vesicle)가 이중 에멀젼 기술을 통해 각 층 단위로 제조되었다. 소포 내부의 수성에는 아미노나프탈렌트리술폰산디소듐(ANTS)이 캡슐화되었으며, 소광제(quencher)로 자일렌비스피리디늄브로마이드(DPX)를 소포가 분산된 버퍼에 포함시켰다. 형광 등급은 100% 형광으로서 DPX가 포함된 완충액의 소포와 0% 형광으로서 ANTS와 DPX의 혼합물이 포함된 완충액의 소포를 고려하여 조정되었다. 소포 용액에 하이드록시부티르산 혼입은 막 구조의 변화를 유도하였으며, 이러한 변화는 하이드록시부티르산 대 지질의 비율에서 소포의 각 층의 상과 관련이 있는 것으로 관찰된다. 관찰된 결과는 머리 그룹과 꼬리 그룹 모두의 패킹 붕괴에 대한 삼투압 및 체적 효과로 인해 소포의 안정성에 의존하는 것으로 보인다.

Keywords

Acknowledgement

This study was supported by the Research Program funded by Seoul National University of Science and Technology.

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