Hello,

We noticed you're browsing in private or incognito mode.

To continue reading this article, please exit incognito mode or log in.

Not an Insider? Subscribe now for unlimited access to online articles.

Rewriting Life

Drug Patches Advance

Radiowave removal of skin aids delivery of medication.

For the millions of diabetics and other patients who need to self-inject drugs daily with painful needles, reliable skin patch devices-similar to the ones ex-smokers use to get their nicotine fix-would be a great relief. The trick is finding ways to push large-molecule drugs, like insulin and human growth hormone, through the skin’s oily top layers. An Israeli company believes it has a promising solution: radio waves.

TransPharma Medical of Yehud, Israel, has developed a handheld device that administers a blast of radio frequency energy to scrape away the top layer of skin cells. This produces channels about 50 micrometers wide that allow drugs from a patch to work their way into the bloodstream. “Of the methods used to open up channels through the skin to allow bigger molecules to be delivered, this company’s approach sounds the most promising,” says Gordon Flynn, professor of pharmaceutical science at the University of Michigan. That’s because the device-which has met with success in initial studies-opens pores for a whole day with minimum discomfort, sterilizes them, and adjusts for different skin types, Flynn says.

Still, TransPharma hasn’t proven its technology in human trials. Chief executive officer Daphna Heffetz says that within a few months, the company will begin clinical trials of a patch for people suffering from human-growth-hormone deficiencies. The company is conducting studies with four pharmaceutical companies to determine the feasibility of the approach with insulin and other drugs. “It looks interesting, but it is still early stage,” says Samir Mitragotri, a chemical engineer at the University of California, Santa Barbara, and a cofounder of Sontra Medical of Franklin, MA.

This story is part of our November 2003 Issue
See the rest of the issue
Subscribe

There’s plenty of competition. Sontra, for example, is developing an approach that uses ultrasound. “There is a place for more than one technology in the market. I think each viable technology will find its niche,” says Mitragotri. Whichever versions succeed, they could create a $5.7 billion market by 2009 in the U.S. alone, says Ajit Baid, analyst at the research firm Frost and Sullivan.

Want to go ad free? No ad blockers needed.

Become an Insider
Already an Insider? Log in.
More from Rewriting Life

Reprogramming our bodies to make us healthier.

Want more award-winning journalism? Subscribe and become an Insider.
  • Insider Plus {! insider.prices.plus !}* Best Value

    {! insider.display.menuOptionsLabel !}

    Everything included in Insider Basic, plus the digital magazine, extensive archive, ad-free web experience, and discounts to partner offerings and MIT Technology Review events.

    See details+

    What's Included

    Unlimited 24/7 access to MIT Technology Review’s website

    The Download: our daily newsletter of what's important in technology and innovation

    Bimonthly print magazine (6 issues per year)

    Bimonthly digital/PDF edition

    Access to the magazine PDF archive—thousands of articles going back to 1899 at your fingertips

    Special interest publications

    Discount to MIT Technology Review events

    Special discounts to select partner offerings

    Ad-free web experience

  • Insider Basic {! insider.prices.basic !}*

    {! insider.display.menuOptionsLabel !}

    Six issues of our award winning print magazine, unlimited online access plus The Download with the top tech stories delivered daily to your inbox.

    See details+

    What's Included

    Unlimited 24/7 access to MIT Technology Review’s website

    The Download: our daily newsletter of what's important in technology and innovation

    Bimonthly print magazine (6 issues per year)

  • Insider Online Only {! insider.prices.online !}*

    {! insider.display.menuOptionsLabel !}

    Unlimited online access including articles and video, plus The Download with the top tech stories delivered daily to your inbox.

    See details+

    What's Included

    Unlimited 24/7 access to MIT Technology Review’s website

    The Download: our daily newsletter of what's important in technology and innovation

/3
You've read of three free articles this month. for unlimited online access. You've read of three free articles this month. for unlimited online access. This is your last free article this month. for unlimited online access. You've read all your free articles this month. for unlimited online access. You've read of three free articles this month. for more, or for unlimited online access. for two more free articles, or for unlimited online access.
Leading Approaches to through-the-Skin Drug Delivery
Company
Technology
Status
Altea Therapeutics (Atlanta, GA) Electrical pulse that turns to heat to create micropores through skin Patches for osteoporosis, pain medication, and insulin in preliminary trials
Alza
(Mountain View, CA)
Low-level electric current that opens up pores In final phase of tests for fentanyl, a drug used to treat postoperative pain
Sontra Medical
(Franklin, MA)
Ultrasound used to open up pores In development for growth hormones; pain patches could be ready by 2006
TransPharma Medical
(Yehud, Israel)
Radio frequency energy that creates microchannels through the top
layer of skin
Preliminary human trials for human growth hormone; feasibility studies with four pharmaceutical companies