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
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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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Method for Controlling Intracellular Protein Activity Using Photoresponsive Nanoparticles [PDF]

Shuhei Murayama, Noriaki Kono, Takashi Takaki, and Masaru Kato

(Received August 11, 2021; Accepted October 12, 2021)

Keywords: photoresponsive nanoparticles, gel mesh structure, encapsulated proteins, controlled release, protein function control

Protein levels in cells can be controlled by delivering and releasing the target protein to a cell. Herein, we report the preparation of photoresponsive nanoparticles with different protein loadings for application as protein delivery vehicles. The nanoparticles were prepared by radical polymerization using an X-shaped photoresponsive linker (Mw = 2000) and a cationic linker. The incorporation of a fluorescent polysaccharide (FITC-Dex) or protein (caspase 3) into the nanoparticles did not create significant differences in the physical properties of the resultant nanoparticles; they were ~150 nm in size with weak positive zeta potentials. These new photoresponsive nanoparticles can encapsulate and release various protein-containing compounds with different molecular weights (3–250 kDa). In addition, the amount of compound released from the nanoparticles can be tailored by altering the amount of compound encapsulated in the nanoparticles. In this study, nanoparticles containing cationic units were introduced into cells via endocytosis. We controlled the activity of the nanoparticle-released proteins within HeLa cells. Specifically, adjusting the protein loading in the nanoparticles enabled control over the activity of the proteins released into the cell, and thus the level of protein function, which provides a powerful tool for elucidating the functions of proteins.

Corresponding author: Masaru Kato


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