Navigation Links
A Drug-Dispensing Contact Lens
Date:7/21/2009

Sustained-release could ease treatment of glaucoma and other conditions

BOSTON, July 21 /PRNewswire-USNewswire/ -- Taking eye drops multiple times a day can be difficult for patients to do, and because of blinking and tearing, as little as 1 to 7 percent of the dose is actually absorbed by the eye. Now, researchers led by Daniel Kohane, MD, PhD, director of the Laboratory for Biomaterials and Drug Delivery at Children's Hospital Boston, have developed special contact lenses that can gradually dispense a constant amount of medication to the eye, at adjustable rates. They describe their prototype lens in the July issue of Investigative Ophthalmology and Visual Science.

Although other groups have developed drug-releasing contact lenses, none have been able to achieve a constant, steady release of substantial amounts of drug; typically, a burst of drug is delivered in the first few hours, followed by rapidly dwindling amounts that are too low to be therapeutic. Kohane, collaborator Joseph Ciolino, MD, of the Massachusetts Eye and Ear Infirmary, and colleagues at the Department of Chemical Engineering at the Massachusetts Institute of Technology (MIT) created a two-layer contact lens with an inner drug-bearing biodegradable polymer film known as PLGA. Both PLGA and pHEMA (used for the coating) have been well studied and are already approved for ocular use by the Food and Drug Administration.

In laboratory testing, the prototype lenses dispensed ciprofloxacin (an antibiotic often used in eye drops) for 30 days, the longest duration for which contact lenses are currently approved by the FDA; in some tests, the lenses continued releasing drug for up to 100 days. The amounts dispensed were sufficient to kill pathogens in a laboratory assay.

Kohane and Ciolino see applications in conditions such as glaucoma and dry-eye which require frequent daily eye drops. They have begun to test the lens in animals and plan to begin human testing as soon as possible. The technology recently won the Life Sciences track in MIT's 100K Entrepreneurship Competition.

The study was supported by the National Institute of General Medical Sciences at the National Institutes of Health, a Fight for Sight Grant-in-Aid, a Center for Integration of Medicine and Innovative Technology/Johnson & Johnson Young Investigator Award and the Boston KPro Fund, Massachusetts Eye and Ear Infirmary.

Citation: Ciolino JB, Hoare TR, Iwata NG, et al. A drug-eluting contact lens. Invest Ophthalmol Vis Sci 2009; 50:3346-52.

[Note to reporters: A photo of the lens is available from the Association for Research in Vision and Ophthalmology. Please contact Jamie Newton at 617-919-3110 or james.newton@childrens.harvard.edu to obtain the image.]

Children's Hospital Boston is home to the world's largest research enterprise based at a pediatric medical center, where its discoveries have benefited both children and adults since 1869. More than 500 scientists, including eight members of the National Academy of Sciences, 12 members of the Institute of Medicine and 12 members of the Howard Hughes Medical Institute comprise Children's research community. Founded as a 20-bed hospital for children, Children's Hospital Boston today is a 397-bed comprehensive center for pediatric and adolescent health care grounded in the values of excellence in patient care and sensitivity to the complex needs and diversity of children and families. Children's also is the primary pediatric teaching affiliate of Harvard Medical School. For more information about the hospital and its research visit: www.childrenshospital.org/newsroom.

    CONTACT:
    Jamie Newton
    Children's Hospital Boston
    617-919-3110
    james.newton@childrens.harvard.edu


'/>"/>
SOURCE Children's Hospital of Boston
Copyright©2009 PR Newswire.
All rights reserved

Related medicine news :

1. Omnetics' Multi-Contact Nano Connectors Obtain Digital Transmission Rates Over 2 Gb/sec.
2. Can a Contact Lens Cure Nearsightedness? Five-Year Clinical Study Testing Corneal Reshaping Therapy as Possible Method to Arrest Myopia
3. Clearly Contacts Named to BC Business Magazine Top 100 Public Companies List
4. Bausch & Lomb Kicks Off U.S. Consumer Online Marketing Campaign for SofLens(R) Daily Disposable Contact Lenses
5. Girls Overall Self-Worth Improves With Contact Lens Wear, Study Shows
6. Schmidt & Clark, LLP: FDA Reports Show Abbott Labs Subsidiary Failed to Disclose Parasite Eye Infections Tied to Contact Lens Solution
7. Kevin Niksarli, M.D. of Manhattan Lasik Center Reviews Pros and Cons of Contact Lenses vs. iLASIK at an International Meeting on 7/1/2009
8. Clearly Contacts Goes Green With Organic Glasses
9. Clearly Contacts Announces Another Quarter Of Growth In The Economic Downturn
10. VisionDirect.com Offers Contact Lens Customers a New Way to Pay
11. Clearly Contacts Expands Healthy Balance Initiative For Employees
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2016)... ... 2016 , ... Each year Standard Process Inc. ... this year’s Life University winner of a $2,500 scholarship from Standard ... Awards ceremony. , Outerbridge is approaching her last quarter at Life University in ...
(Date:5/26/2016)... (PRWEB) , ... May 26, 2016 , ... There are ... Hot Dog and Sausage Council (NHDSC) suggests that Americans prefer their dogs straight off ... 63 percent say grilling is their favorite way to cook a hot dog, far ...
(Date:5/26/2016)... ... May 26, 2016 , ... Intalere, ... members and suppliers for its inaugural Member Conference at the Paris Hotel in ... elevating the operational health of America’s healthcare providers. , The conference was highlighted ...
(Date:5/26/2016)... (PRWEB) , ... May 26, 2016 , ... On Memorial ... and women who lost their lives in military battle for the country. The ... in 2015 to provide more programs that empower independence for disabled military veterans, as ...
(Date:5/26/2016)... Franklin, TN (PRWEB) , ... May 26, 2016 , ... ... today, and more than 32 million cancer survivors worldwide. On Sunday, June 5, 2016, ... the 29th annual National Cancer Survivors Day®. , National Cancer Survivors Day® is ...
Breaking Medicine News(10 mins):
(Date:5/26/2016)... 2016 A key trend that ... emergence of new treatments. Cardax, a development stage life ... The therapy is expected to fulfil large unmet medical ... conducting studies to develop new treatments for osteoarthritis. One ... involved in osteoarthritis are being investigated, and early trials ...
(Date:5/26/2016)... WELLESLEY, Massachusetts , May 26, 2016 ... sequencing (NGS) has matured into an essential life science ... research and development applications. BCC Research reveals in its ... of a second growth phase, one powered by a ... applied fields.      (Logo: http://photos.prnewswire.com/prnh/20140723/694805 ...
(Date:5/25/2016)... Deutschland und GERMANTOWN, Maryland , ... Zusammenarbeit mit Therawis bedient dringenden ...   QIAGEN N.V. (NASDAQ: ... bekannt, eine Lizenz- und Entwicklungsvereinbarung mit Therawis Diagnostics ... die Onkologie eingegangen zu sein. Ein erstes Projekt ...
Breaking Medicine Technology: