Featured Research

from universities, journals, and other organizations

Successful human tests for first wirelessly controlled drug-delivery chip

Date:
February 16, 2012
Source:
Massachusetts Institute of Technology
Summary:
About 15 years ago, two professors had the idea to develop a programmable, wirelessly controlled microchip that would deliver drugs after implantation in a patient's body. This week, they reported that they have successfully used such a chip to administer daily doses of an osteoporosis drug normally given by injection. The results represent the first successful test of such a device.

This implantable medical device, developed by professors Robert Langer and Michael Cima and colleagues, allows repeated wireless drug delivery in lieu of injections.
Credit: M. Scott Brauer

About 15 years ago, MIT professors Robert Langer and Michael Cima had the idea to develop a programmable, wirelessly controlled microchip that would deliver drugs after implantation in a patient's body. This week, the MIT researchers and scientists from MicroCHIPS Inc. reported that they have successfully used such a chip to administer daily doses of an osteoporosis drug normally given by injection.

The results, published in the Feb. 16 online edition of Science Translational Medicine, represent the first successful test of such a device and could help usher in a new era of telemedicine -- delivering health care over a distance, Langer says.

"You could literally have a pharmacy on a chip," says Langer, the David H. Koch Institute Professor at MIT. "You can do remote control delivery, you can do pulsatile drug delivery, and you can deliver multiple drugs."

In the new study, funded and overseen by MicroCHIPS, scientists used the programmable implants to deliver an osteoporosis drug called teriparatide to seven women aged 65 to 70. The study found that the device delivered dosages comparable to injections, and there were no adverse side effects.

These programmable chips could dramatically change treatment not only for osteoporosis, but also for many other diseases, including cancer and multiple sclerosis. "Patients with chronic diseases, regular pain-management needs or other conditions that require frequent or daily injections could benefit from this technology," says Robert Farra, president and chief operating officer at MicroCHIPS and lead author of the paper.

"Compliance is very important in a lot of drug regimens, and it can be very difficult to get patients to accept a drug regimen where they have to give themselves injections," says Cima, the David H. Koch Professor of Engineering at MIT. "This avoids the compliance issue completely, and points to a future where you have fully automated drug regimens."

Achieving precision

The MIT research team started working on the implantable chip in the mid-1990s. John Santini, then a University of Michigan undergraduate visiting MIT, took it on as a summer project under the direction of Cima and Langer. Santini, who later returned to MIT as a graduate student to continue the project, is also an author of the new paper.

In 1999, the MIT team published its initial findings in Nature, and MicroCHIPS was founded and licensed the microchip technology from MIT. The company refined the chips, including adding a hermetic seal and a release system that works reliably in living tissue. Teriparatide is a polypeptide and therefore much less chemically stable than small-molecule drugs, so sealing it hermetically to preserve it was an important achievement, Langer says.

The human clinical trial began in Denmark in January 2011. Chips were implanted during a 30-minute procedure at a doctor's office using local anesthetic, and remained in the patients for four months. The implants proved safe, and patients reported they often forgot they even had the implant, Cima says.

Chips used in the study stored 20 doses of teriparatide, individually sealed in tiny reservoirs about the size of a pinprick. The reservoirs are capped with a thin layer of platinum and titanium that melts when a small electrical current is applied, releasing the drug inside. MicroCHIPS is now working on developing implants that can carry hundreds of drug doses per chip.

Because the chips are programmable, dosages can be scheduled in advance or triggered remotely by radio communication over a special frequency called Medical Implant Communication Service (MICS). Current versions work over a distance of a few inches, but researchers plan to extend that range.

Consistent results

In the Science Translational Medicine study, the researchers measured bone formation in osteoporosis patients with the implants, and found that it was similar to that seen in patients receiving daily injections of teriparatide. Another notable result is that the dosages given by implant had less variation than those given by injection.

Henry Brem, professor of neurosurgery, ophthalmology, oncology and biological engineering at Johns Hopkins University School of Medicine, called the results "stunning."

"It's very rare to find a paper that is really a breakthrough in technology," says Brem, who was not part of the research team. "It fulfills the promise of polymer drug delivery and the incredible sophistication of microchip capabilities."

Once a version of the implant that can carry a larger number of doses is ready, MicroCHIPS plans to seek approval for further clinical trials, Farra says. The company has also developed a sensor that can monitor glucose levels. Eventually such sensors could be combined with chips that contain drug reservoirs, creating a chip that can adapt drug treatments in response to the patient's condition.


Story Source:

The above story is based on materials provided by Massachusetts Institute of Technology. Note: Materials may be edited for content and length.


Journal Reference:

  1. Robert Farra, Norman F. Sheppard, Laura Mccabe, Robert M. Neer, James M. Anderson, John T. Santini Jr., Michael J. Cima And Robert Langer. First-in-Human Testing of a Wirelessly Controlled Drug Delivery Microchip. Science Translational Medicine, Feb 16, 2012 DOI: 10.1126/scitranslmed.3003276

Cite This Page:

Massachusetts Institute of Technology. "Successful human tests for first wirelessly controlled drug-delivery chip." ScienceDaily. ScienceDaily, 16 February 2012. <www.sciencedaily.com/releases/2012/02/120216144236.htm>.
Massachusetts Institute of Technology. (2012, February 16). Successful human tests for first wirelessly controlled drug-delivery chip. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2012/02/120216144236.htm
Massachusetts Institute of Technology. "Successful human tests for first wirelessly controlled drug-delivery chip." ScienceDaily. www.sciencedaily.com/releases/2012/02/120216144236.htm (accessed July 29, 2014).

Share This




More Health & Medicine News

Tuesday, July 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Ebola Virus Threatens West Africa

Deadly Ebola Virus Threatens West Africa

AP (July 28, 2014) West African nations and international health organizations are working to contain the largest Ebola outbreak in history. It's one of the deadliest diseases known to man, but the CDC says it's unlikely to spread in the U.S. (July 28) Video provided by AP
Powered by NewsLook.com
$15B Deal on Vets' Health Care Reached

$15B Deal on Vets' Health Care Reached

AP (July 28, 2014) A bipartisan deal to improve veterans health care would authorize at least $15 billion in emergency spending to fix a veterans program scandalized by long patient wait times and falsified records. (July 28) Video provided by AP
Powered by NewsLook.com
Two Americans Contract Ebola in Liberia

Two Americans Contract Ebola in Liberia

Reuters - US Online Video (July 28, 2014) Two American aid workers in Liberia test positive for Ebola while working to combat the deadliest outbreak of the virus ever. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Traditional African Dishes Teach Healthy Eating

Traditional African Dishes Teach Healthy Eating

AP (July 28, 2014) Classes are being offered nationwide to encourage African Americans to learn about cooking fresh foods based on traditional African cuisine. The program is trying to combat obesity, heart disease and other ailments often linked to diet. (July 28) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins