Research & Development World

  • Home Page
  • Topics
    • Aerospace
    • Archeology
    • Automotive
    • Biotech
    • Chemistry
    • COVID-19
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Market Pulse
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
      • Software
    • Semiconductors
  • 2021 R&D 100 Award Winners
    • R&D 100 Awards
    • 2020 Winners
    • Winner Archive
  • Resources
    • Digital Issues
    • Podcasts
    • Subscribe
  • Global Funding Forecast
  • Webinars

Injected DNA Nanodevice Functions as Light-activated Cell Remote Control

By American Chemical Society | April 22, 2018

A novel near-infrared light-activated DNA agonist (NIR-DA) nanodevice for nongenetic manipulation of cell signaling and phenotype in deep tissues. This nanodevice is prepared by conjugating a preinactivated DNA agonist onto the gold nanorods (AuNRs). Upon NIR light treatment, the DNA agonist is released through the localized surface plasmon resonance (LSPR)-based photothermal effect of AuNRs and becomes active. The active DNA agonist dimerizes the DNA-modified chimeric or native receptor tyrosine kinase (RTK) on cell surfaces and activates downstream signal transduction in live cells. Image: © ACS

What if doctors had a remote control that they could use to steer a patient’s own cells to a wound to speed up the healing process?

Although such a device is still far from reality, researchers reporting in the ACS journal Nano Letters (“Near-Infrared Light-Activated DNA-Agonist Nanodevice for Nongenetically and Remotely Controlled Cellular Signaling and Behaviors in Live Animals”) have taken an important first step: they used near-infrared light and an injected DNA nanodevice to guide stem cells to an injury, which helped muscle tissue regrow in mice.

Complex signaling pathways coordinate cellular activities such as movement, proliferation and even death.

For example, when signaling molecules bind to proteins called receptor tyrosine kinases on a cell’s surface, they trigger the receptors to form pairs and phosphorylate each other. This process can activate other proteins that ultimately lead to a cell moving or growing.

Hong-Hui Wang, Zhou Nie and colleagues wondered if they could introduce a nanodevice to cells that would rewire this system, causing receptors to become activated by near-infrared light instead of signaling molecules.

The researchers chose near-infrared because it can go through living tissues, unlike ultraviolet or visible light. The team targeted a receptor tyrosine kinase called MET, which is essential for wound healing.

The researchers designed a DNA molecule that can bind to two MET receptors simultaneously, linking them together and activating them. To make the system responsive to light, the team attached multiple copies of the DNA sequence to gold nanorods. When illuminated with near-infrared light, the nanorods heated up and released the DNA so that it could activate the receptors.

The researchers injected the DNA-bound gold nanorods into mice at the site of an injury and shone a near-infrared light on the mice for a few minutes. After three days, more muscle stem cells had migrated to the wound in treated mice than in control mice. The treated mice also showed increased signs of muscle regeneration compared with untreated mice.

Related Articles Read More >

What are nanocatalysts?
What are nanostructures?
What are nanoparticles?
Breakthrough paves way for photonic sensing at the ultimate quantum limit
2021 R&D Global Funding Forecast

Need R&D World news in a minute?

We Deliver!
R&D World Enewsletters get you caught up on all the mission critical news you need in research and development. Sign up today.
Enews Signup

R&D World Digital Issues

February 2020 issue

Browse the most current issue of R&D World and back issues in an easy to use high quality format. Clip, share and download with the leading R& magazine today.

Research & Development World
  • Subscribe to R&D World Magazine
  • Enews Sign Up
  • Contact Us
  • About Us
  • Drug Discovery & Development
  • Pharmaceutical Processing
  • 2022 Global Funding Forecast

Copyright © 2022 WTWH Media LLC. All Rights Reserved. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media
Privacy Policy | Advertising | About Us

Search R&D World

  • Home Page
  • Topics
    • Aerospace
    • Archeology
    • Automotive
    • Biotech
    • Chemistry
    • COVID-19
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Market Pulse
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
      • Software
    • Semiconductors
  • 2021 R&D 100 Award Winners
    • R&D 100 Awards
    • 2020 Winners
    • Winner Archive
  • Resources
    • Digital Issues
    • Podcasts
    • Subscribe
  • Global Funding Forecast
  • Webinars