Research & Development World

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE

Breakthrough Technique Combats Cancer Drug Resistance

By University of Maryland | February 9, 2018

The ability for cancer cells to develop resistance to chemotherapy drugs – known as multidrug resistance – remains a leading cause for tumor recurrence and cancer metastasis, but recent findings offer hope that oncologists could one day direct cancer cells to “turn off” their resistance capabilities.

New findings put forth by University of Maryland Fischell Department of Bioengineering professor Xiaoming “Shawn” He and researchers from five other academic institutions point to a technique that uses specially designed nanoparticles and near infrared laser treatment to cause cancer cells to lose their multidrug resistance capabilities for days at a time. This creates a therapeutic window for chemotherapy to combat even the most drug-resistant cells left behind after surgery or earlier treatment. The group’s findings were published Feb. 8, 2018 in Nature Communications.

“By administering chemotherapy within this ‘therapeutic window,’ oncologists could apply a lower dose of chemotherapy drugs to patients, with the potential for an improved treatment outcome – all while minimizing drug toxicity to healthy organs,” He said.

One of the primary reasons cancer cells develop resistance is the overexpression of what are known as efflux pumps – proteins that protect a cell by pumping out unwanted toxic substances before they can reach their intended target. In the same way that efflux pumps work hard to protect against toxins, they also expel virtually all clinically relevant chemotherapy drugs.

Fortunately, efflux pumps require a source of chemical energy to perform their function. As such, by cutting off the energy supply to the efflux pumps, oncologists could lower – or even eliminate – a cell’s resistance to drugs, such as those administered for chemotherapy. Recognizing this, He and his research team developed a way to reduce the amount of chemical energy – adenosine triphosphate (ATP) – available to the efflux pumps in cancer cells.

The team – which also included researchers from The Ohio State University, University of Virginia, University of Missouri School of Medicine, Shanghai University of Traditional Chinese Medicine and Indiana University School of Medicine – targeted a specially designed nanoparticle to the mitochondrion, the cell’s power generator wherein the cell converts oxygen and nutrients into ATP. Once the nanoparticles reach the cancer cells’ mitochondria, the researchers apply near infrared laser treatment to trigger a chemical reaction that reduces the amount of ATP available to the pumps and, thus, cuts off their power supply. Such treatment both reduces the expression of the efflux pumps and decreases their distribution on the cell plasma membrane.

The research team’s findings demonstrate that the drug-laden nanoparticles – in combination with near infrared laser treatment – can effectively inhibit the growth of multidrug-resistant tumors with no evident systemic toxicity.

While researchers have long worked with nanoparticles for drug delivery, the findings put forth by He and his team represent a crucial breakthrough in addressing multidrug resistance in cancer cells.

“For years, researchers have focused on delivering more chemotherapy drugs into cancer cells using nanoparticles, without targeting the root of drug resistance,” He said. “This meant that the cancer cells maintained their ability to expel the chemotherapy drugs, which limited any enhancement of the cancer therapy. To address this challenge, our research group is using nanoparticles not only to deliver more chemotherapy drugs to the target site within cancer cells, but also to compromise the function of the efflux pumps and thereby significantly improve safety and efficacy of cancer therapy.”

SOURCE: University of Maryland

Related Articles Read More >

Eli Lilly facility
9 R&D developments this week: Lilly builds major R&D center, Stratolaunch tests hypersonic craft, IBM chief urges AI R&D funding
professional photo of wooly mammoth in nature --ar 2:1 --personalize sq85hce --v 6.1 Job ID: 47185eaa-b213-4624-8bee-44f9e882feaa
Why science ethicists are sounding skepticism and alarm on ‘de-extinction’
ALAFIA system speeds complex molecular simulations for University of Miami drug research
3d rendered illustration of the anatomy of a cancer cell
Funding flows to obesity, oncology and immunology: 2024 sales data show where science is paying off
rd newsletter
EXPAND YOUR KNOWLEDGE AND STAY CONNECTED
Get the latest info on technologies, trends, and strategies in Research & Development.
RD 25 Power Index

R&D World Digital Issues

Fall 2024 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&D magazine today.

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

Copyright © 2025 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

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE