S&M Young Researcher Paper Award 2020
Recipients: Ding Jiao, Zao Ni, Jiachou Wang, and Xinxin Li [Winner's comments]
Paper: High Fill Factor Array of Piezoelectric Micromachined
Ultrasonic Transducers with Large Quality Factor

S&M Young Researcher Paper Award 2021
Award Criteria
Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Factors Facilitating Fusion between Dye-encapsulating Vesicles and Giant Unilamellar Vesicles

Daiya Mombayashi, Ami Yasuhara, Kai Hashino, Akira Heya, and Koji Sumitomo

(Received June 8, 2021; Accepted October 13, 2021)

Keywords: vesicle fusion, molecular transport, dye-encapsulating vesicles, nanobiotechnology, flow control system

Vesicle fusion plays an important role in molecular transport and signal transduction in vivo. Fusion occurs even in artificial vesicles without proteins, as long as cations are present similar to the physiological environment. The progress of fusion between vesicles encapsulating a fluorescent dye (calcein) and giant unilamellar vesicles was examined using a fluorescence microscope. In the case of vesicles formed with phosphatidylcholine alone, the fusion begins due to the suppression of electrostatic repulsion by cations such as Ca2+. However, almost all vesicles remain in the state of adsorption or hemifusion even after 1 h or more, and it is difficult to proceed to full fusion. In contrast, mixing phosphatidylethanolamine with vesicles facilitates the progression from hemifusion to full fusion, and the transfer of calcein to the giant unilamellar vesicle (GUV) was observed immediately after beginning the vesicle fusion. This is probably because the small head group makes the fluid phase lipid bilayer unstable.

Corresponding author: Koji Sumitomo

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