A nationwide, government-sponsored study finds that people with a common form of diabetic retinopathy can benefit from a medication first developed to combat another potentially blinding disease, age-related macular degeneration (AMD).
Treating diabetic macular edema (DME) with ranibizumab (Lucentis) eye injections, plus laser treatment if needed, appears to result in better vision than laser treatment alone, according to the Diabetic Retinopathy Clinical Research (DRCR) Network study published today in Ophthalmology online, the journal of the American Academy of Ophthalmology (Academy). DME is the main cause of vision loss in people with diabetes mellitus.
At the one year follow-up, nearly 50% of study patients who received the new combined treatment had substantial improvement in vision, compared with 28% who received laser treatment alone. Laser treatment has been the standard of care for DME for 25 years.
"The results appear to be applicable to most people who have DME in the center of the macula with some vision loss, whether the person has Type 1 or Type 2 diabetes, is old or young, or is a woman or a man," said Neil M. Bressler, MD, the Chair of the nationwide DRCR Network, and Chief of the Retina Division, Wilmer Eye Institute, Johns Hopkins University School of Medicine.
"This is a seminal study of which ophthalmology should be very proud," said George A. Williams, MD, an Academy board member and Ophthalmology Department Chair, Oakland University William Beaumont School of Medicine. "First and most importantly, it provides patients an improved therapy for diabetic macular edema. Second, the DRCR Network study is the first multi-center, randomized clinical trial to show how ranibizumab and the laser work together to improve treatment."
The DRCR Network investigators studied 854 eyes (691 participants) at 52 clinical centers across the United States, and compared four treatment modalities: ranibizumab plus prompt laser treatment, ranibizumab plus deferred laser treatment (provided at 24 weeks or later, if indicated), a coritcosteroid (triamcinolone) eye injection plus prompt laser treatment, or prompt laser treatment alone.
At the one year follow up patients who had received ranibizumab with prompt or deferred laser treatment had, on average, significantly better visual acuity than the group treated with laser alone. Also, significantly more patients in the ranibizumab-treated groups gained vision, and fewer suffered vision loss. In patients who entered the study after having cataract surgery and lens implants, results for corticosteroids plus laser treatment appeared comparable to the ranibizumab results, but intraocular pressure (IOP) increased in some corticosteroid-treated patients. Elevated IOP is undesirable because it can increase the risk of glaucoma. Negative outcomes were minimal in patients treated with ranibizumab. Results at two years were comparable to year one, but the researchers urge further study to confirm the longer-term safety and effects of ranibizumab for diabetic macular edema patients.
"In the brave new world of health care reform, the DRCR Network will serve as a model for future comparative effectiveness studies," Dr. Williams said.
The Academy will review the DRCR Network results and recommendations to determine whether, going forward, ranibizumab plus laser treatment should be a preferred treatment for most patients with diabetic macular edema with characteristics similar to those enrolled in this DRCR Network study.
Drs. Bressler and Williams emphasize that people with diabetes should ask their ophthalmologists (Eye M.D.s) if the new treatment approach might be appropriate for them. Although ranibizumab is an FDA-approved drug for AMD, it is not yet specifically approved for use with DME. Not every insurance company covers its use for DME at this time, since the definitive DRCR Network study results have just been published, although some insurance companies currently do cover this use based on previous smaller studies with briefer follow-up. Also, the DRCR Network study did not evaluate a very similar drug, bevacizumab (Avastin), so definitive confirmation of its potential effectiveness in DME is not yet available.
Eds: Full text of the study is available from the Academy's media relations department.
About the American Academy of Ophthalmology
The American Academy of Ophthalmology is the world's largest association of eye physicians and surgeons—Eye M.D.s—with more than 27,000 members worldwide. Eye health care is provided by the three "O's" – opticians, optometrists and ophthalmologists. It is the ophthalmologist, or Eye M.D., who can treat it all: eye diseases and injuries, and perform eye surgery. To find an Eye M.D. in your area, visit the Academy's Web site at www.aao.org.
Mary Wade | EurekAlert!
Europe’s Demographic Future. Where the Regions Are Heading after a Decade of Crises
10.08.2017 | Berlin-Institut für Bevölkerung und Entwicklung
Scientists reveal source of human heartbeat in 3-D
07.08.2017 | University of Manchester
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
18.08.2017 | Life Sciences
18.08.2017 | Physics and Astronomy
18.08.2017 | Materials Sciences