Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > ‘Tattoo’ may help diabetics track their blood sugar

Abstract:
Chemical engineers are working on carbon nanotubes that could be injected under the skin to reveal blood glucose levels

By Anne Trafton

‘Tattoo’ may help diabetics track their blood sugar

Cambridge, MA | Posted on May 28th, 2010

People with type I diabetes must prick their fingers several times a day to test their blood sugar level. Though the pain is minor, the chore interferes with daily life.

"They never really escape it," says Paul Barone, a postdoctoral researcher in MIT's Department of Chemical Engineering. Barone and professor Michael Strano are working on a new type of blood glucose monitor that could not only eliminate the need for finger pricks but also offer more accurate readings.

"Diabetes is an enormous problem, global in scope, and despite decades of engineering advances, our ability to accurately measure glucose in the human body still remains quite primitive," says Strano, the Charles and Hilda Roddey Associate Professor of Chemical Engineering. "It is a life-and-death issue for a growing number of people."

Strano and Barone's sensing system consists of a "tattoo" of nanoparticles designed to detect glucose, injected below the skin. A device similar to a wristwatch would be worn over the tattoo, displaying the patient's glucose levels.

Continuous glucose detection

A 2008 study (1) in the New England Journal of Medicine showed that continuous monitoring helped adult type I diabetes patients who were at least 25 years old better control their blood glucose levels. However, existing wearable devices are not as accurate as the finger-prick test and have to be recalibrated once or twice a day — a process that still involves pricking the finger.

"The most problematic consequences of diabetes result from relatively short excursions of a person's blood sugar outside of the normal physiological range, following meals, for example," says Strano. "If we can detect and prevent these excursions, we can go a long way toward reducing the devastating impact of this disease."

Most existing continuous glucose sensors work via an injection of an enzyme called glucose oxidase, which breaks down glucose. An electrode placed on the skin interacts with a by-product of that reaction, hydrogen peroxide, allowing glucose levels to be indirectly measured. However, none of those sensors have been approved for use longer than seven days at a time.

Bruce Buckingham, a professor of pediatric endocrinology at the Stanford School of Medicine and an author of the NEJM study, says glucose monitoring is definitely headed toward wearable sensors. However, he expects it will be a few years before any are approved for use without backup monitoring with a finger prick test. "As time goes on, the devices to do this should become smaller, easier to wear, and more accurate," says Buckingham, who is not involved in the MIT project.

Taking advantage of nanotubes

The technology behind the MIT sensor, described in a December 2009 issue (2) of ACS Nano, is fundamentally different from existing sensors, says Strano. The sensor is based on carbon nanotubes wrapped in a polymer that is sensitive to glucose concentrations. When this sensor encounters glucose, the nanotubes fluoresce, which can be detected by shining near-infrared light on them. Measuring the amount of fluorescence reveals the concentration of glucose.

The researchers plan to create an "ink" of these nanoparticles suspended in a saline solution that could be injected under the skin like a tattoo. The "tattoo" would last for a specified length of time, probably six months, before needing to be refreshed.

To get glucose readings, the patient would wear a monitor that shines near-infrared light on the tattoo and detects the resulting fluorescence. One advantage of this type of sensor is that, unlike some fluorescent molecules, carbon nanotubes aren't destroyed by light exposure. "You can shine the light as long as you want, and the intensity won't change," says Barone. Because of this, the sensor can give continuous readings.

Development of the nanoparticles and the wearable monitor is being funded by MIT's Deshpande Center for Technological Innovation.

Barone and Strano are now working to improve the accuracy of their sensor. Any glucose monitor must pass a test known as the Clarke Error Grid, the gold standard for glucose-sensor accuracy. The test, which compares sensor results to results from a lab-based glucose meter, needs to be very stringent, since mistakes in glucose detection can be fatal.

They are still years away from human trials, says Barone, but they may soon start trials in animals. Those tests will be key to determining the value of this approach, says Buckingham. "You don't know how good it will be until you put it in someone and see how strong the signal is," he says.

(1) content.nejm.org/cgi/content/full/NEJMoa0805017
(2) pubs.acs.org/doi/abs/10.1021/nn901025x?searchHistoryKey=&prevSearch=%255Bauthor%253A%2Bstrano%255D&journalCode=ancac3

####

For more information, please click here

Copyright © MIT

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Researchers develop artificial building blocks of life March 8th, 2024

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

Govt.-Legislation/Regulation/Funding/Policy

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Researchers’ approach may protect quantum computers from attacks March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Optically trapped quantum droplets of light can bind together to form macroscopic complexes March 8th, 2024

Possible Futures

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Academic/Education

Rice University launches Rice Synthetic Biology Institute to improve lives January 12th, 2024

Multi-institution, $4.6 million NSF grant to fund nanotechnology training September 9th, 2022

National Space Society Helps Fund Expanding Frontier’s Brownsville Summer Entrepreneur Academy: National Space Society and Club for the Future to Support Youth Development Program in South Texas June 24th, 2022

How a physicist aims to reduce the noise in quantum computing: NAU assistant professor Ryan Behunin received an NSF CAREER grant to study how to reduce the noise produced in the process of quantum computing, which will make it better and more practical April 1st, 2022

Nanotubes/Buckyballs/Fullerenes/Nanorods/Nanostrings

Catalytic combo converts CO2 to solid carbon nanofibers: Tandem electrocatalytic-thermocatalytic conversion could help offset emissions of potent greenhouse gas by locking carbon away in a useful material January 12th, 2024

TU Delft researchers discover new ultra strong material for microchip sensors: A material that doesn't just rival the strength of diamonds and graphene, but boasts a yield strength 10 times greater than Kevlar, renowned for its use in bulletproof vests November 3rd, 2023

Tests find no free-standing nanotubes released from tire tread wear September 8th, 2023

Detection of bacteria and viruses with fluorescent nanotubes July 21st, 2023

Nanomedicine

High-tech 'paint' could spare patients repeated surgeries March 8th, 2024

Researchers develop artificial building blocks of life March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Sensors

$900,000 awarded to optimize graphene energy harvesting devices: The WoodNext Foundation's commitment to U of A physicist Paul Thibado will be used to develop sensor systems compatible with six different power sources January 12th, 2024

A color-based sensor to emulate skin's sensitivity: In a step toward more autonomous soft robots and wearable technologies, EPFL researchers have created a device that uses color to simultaneously sense multiple mechanical and temperature stimuli December 8th, 2023

New tools will help study quantum chemistry aboard the International Space Station: Rochester Professor Nicholas Bigelow helped develop experiments conducted at NASA’s Cold Atom Lab to probe the fundamental nature of the world around us November 17th, 2023

TU Delft researchers discover new ultra strong material for microchip sensors: A material that doesn't just rival the strength of diamonds and graphene, but boasts a yield strength 10 times greater than Kevlar, renowned for its use in bulletproof vests November 3rd, 2023

Announcements

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project