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Once a transport vesicle has recognized its target organelle, the vesicular membrane needs to fuse with the target membrane to unload the cargo. Transmembrane proteins called SNAREs present on organelle membranes and their vesicles, mediate vesicle fusion.
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...
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Preparation of Giant Vesicles Encapsulating Microspheres by Centrifugation of a Water-in-oil Emulsion
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Janus Polymeric Giant Vesicles on Demand: A Predictive Phase Separation Approach for Efficient Formation.

Eloise Equy1,2, Emmanuel Ibarboure1, Eric Grelet2

  • 1Univ. Bordeaux, CNRS, Bordeaux INP LCPO, UMR 5629, Pessac F-33600, France.

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Summary
This summary is machine-generated.

Researchers developed a rational method using Flory-Huggins theory to create Janus polymersomes, achieving over 90% yield for advanced drug delivery and synthetic cell applications.

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Area of Science:

  • Polymer Science
  • Materials Science
  • Biotechnology

Background:

  • Janus particles exhibit intrinsic asymmetry, driving interest in applications like emulsion stabilization, micro/nanomotors, imaging, and drug delivery.
  • Janus polymersomes are promising for synthetic cell development and drug delivery, but their fabrication is often empirical.

Purpose of the Study:

  • To propose a rational, theory-guided approach for fabricating asymmetric Janus polymersomes.
  • To experimentally validate the predictive power of Flory-Huggins theory for Janus polymersome self-assembly.

Main Methods:

  • Utilizing Flory-Huggins theory to predict block copolymer self-assembly into Janus polymersomes.
  • Employing electroformation for the fabrication of Janus giant unilamellar vesicles (JGUVs).
  • Characterizing polymersome morphology and yield through experimental validation.

Main Results:

  • Achieved a high yield (>90%) of stable Janus giant unilamellar vesicles (JGUVs) using biocompatible block copolymers.
  • Developed a phase diagram correlating mixing energy with polymersome morphology for JGUV design.
  • Demonstrated extrusion for producing quasi-monodisperse Janus polymersomes while preserving morphology.

Conclusions:

  • The proposed rational approach effectively predicts and enables the fabrication of Janus polymersomes.
  • The developed phase diagram serves as a valuable tool for designing JGUVs.
  • These polymersomes are suitable for asymmetric functionalization and application as active carriers in drug delivery and synthetic biology.