Navigation Links
Comparative-effectiveness study confirms new treatment for diabetic macular edema
Date:4/27/2010

Researchers have shown that ranibizumab (Lucentis) eye injections, often in combination with laser treatment, result in better vision than laser treatment alone for diabetes-associated swelling of the retina.

Laser treatment alone has been the standard care for the past 25 years. But nearly 50 percent of patients who received this new treatment experienced substantial visual improvement after one year, compared with 28 percent who received the standard laser treatment. The study involved 52 clinical sites within the Diabetic Retinopathy Clinical Research Network (DRCR.net), supported by the National Eye Institute (NEI) and the National Institute of Diabetes and Digestive and Kidney Diseases, part of the National Institutes of Health.

"These results indicate a treatment breakthrough for saving the vision of people with diabetic macular edema," said Neil M. Bressler, M.D., chair of the DRCR.net and chief of the Retina Division at the Wilmer Eye Institute, Johns Hopkins University, Md. "Eye injections of ranibizumab with prompt or deferred laser treatment should now be considered for patients with characteristics similar to those in this clinical trial."

Diabetic retinopathy is the most common cause of vision loss in working-age Americans. This condition damages the small blood vessels in the eye's light-sensitive retinal tissue. When these damaged blood vessels begin to leak fluid near the center of the retina, known as the macula, macular edema occurs. The macula provides detailed central vision used for activities such as reading, driving, and distinguishing faces. In macular edema the retinal tissue swells, which can lead to vision loss if left untreated.

Laser treatment of the retina has been the standard care for diabetic macular edema since an NEI-supported study in 1985 showed it to be beneficial. However, recent small short-term studies have revealed the visual benefits of eye injections of medications that block a chemical signal that stimulates blood vessel growth, known as vascular endothelial growth factor (VEGF). These studies have indicated that repeated doses of anti-VEGF medications, such as ranibizumab, may prevent blood vessels from leaking fluid and causing macular edema. The DRCR.net study, published online April 27 in Ophthalmology, confirms preliminary results and provides evidence of the treatment's effectiveness in combination with laser therapy through at least one year of follow up.

"This comparative-effectiveness study demonstrated that a new treatment can protect and, in many cases, improve the vision of people with diabetic macular edema," said NEI Director Paul A. Sieving, M.D., Ph.D.

The current study included a total of 854 eyes of 691 people, who had one or both eyes treated. Participants, who were on average in their early 60s, were diagnosed with type 1 or 2 diabetes and macular edema. They were randomly assigned to one of four study groups: sham injections plus prompt laser treatment within one week; ranibizumab injections plus prompt laser treatment; ranibizumab plus deferred laser treatment after six months or more; or injections of corticosteroid medication known as triamcinolone (Trivaris) plus prompt laser treatment.

Ranibizumab injections could be given as often as every four weeks, and triamcinolone injections or laser treatments could be given as often as every 16 weeks. In general, treatment was continued until a participant's vision or retinal thickness returned to normal, or additional treatment did not improve vision or retinal swelling.

After one year, nearly 50 percent of eyes treated with ranibizumab and prompt or deferred laser treatment showed a substantial visual improvement. People could read at least two additional lines on an eye chart with the treated eye, or letters that were at least one-third smaller than they could read before the study treatment. Fewer than 5 percent of eyes in these groups experienced a visual loss of two or more lines. The results were similar whether patients received prompt or deferred laser treatment with the ranibizumab injections.

In contrast, about 30 percent of eyes that received laser treatment alone or triamcinolone plus laser showed a visual improvement of two or more lines on an eye chart, while 13 to 14 percent of eyes in these groups had a visual loss of two or more lines.

Although participants in all three injection groups had a greater decrease in retinal thickness after one year than with laser treatment alone, patients who received triamcinolone injections had greater complication rates. About 30 percent of people in the triamcinolone group developed high eye pressure that required medications, and about 60 percent developed cataracts that required surgery.

Few participants who received eye injections of ranibizumab had eye-related complications, such as an infection inside the eye likely caused by the injections, or worsening of a retinal detachment that existed prior to beginning treatment. The study found that eye injections of ranibizumab were not associated with any serious risks such as heart attack or stroke. DRCR.net researchers will continue to monitor the study participants for at least three years to obtain additional information about the safety and effectiveness of these macular edema treatments.


'/>"/>

Contact: National Eye Institute
neinews@nei.nih.gov
301-496-5248
NIH/National Eye Institute
Source:Eurekalert

Related medicine news :

1. CureTogether Announces Online Autism Treatment Study
2. LA BioMed awarded research grant to study HIV prevention gel
3. Study Makes Strides in Understanding Ovarian Cancer
4. Brown Rice Tied to Better Heart Health in Study
5. NIH study confirms location of stem cells near cartilage-rich regions in bones
6. Immune cells predict success of head and neck cancer treatment, U-M study finds
7. Noncardiac Chest Pain May Warrant More Management: Study
8. SGIC Study Finds Drivers Are Losing Their Cool At School
9. Health impacts of mobile phone use to be explored in huge new study
10. Study of Williams syndrome patients reveals specific genes role in intelligence
11. Study Finds Patients Breathe Easier After Weight-Loss Surgery
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... Montreal, Canada (PRWEB) , ... June 25, 2016 , ... ... the pursuit of success. In terms of the latter, setting the bar too high ... low, risk more than just slow progress toward their goal. , Research from ...
(Date:6/24/2016)... ... June 24, 2016 , ... Marcy was in a crisis. Her son James, eight, was ... his family verbally and physically. , “When something upset him, he couldn’t control his emotions,” ... He would throw rocks at my other children and say he was going to kill ...
(Date:6/24/2016)... ... June 24, 2016 , ... Comfort Keepers® of San Diego, ... and the Road To Recovery® program to drive cancer patients to and from their ... to ensure the highest quality of life and ongoing independence. Getting to and ...
(Date:6/24/2016)... ... June 24, 2016 , ... The Haute Beauty Network, affiliated ... Weintraub as a prominent plastic surgeon and the network’s newest partner. , ... most handsome men, look naturally attractive. Plastic surgery should be invisible.” He stands ...
(Date:6/24/2016)... ... ... Venture Construction Group (VCG) sponsors Luke’s Wings 5th Annual ... Country Club at 1201 Rockville Pike, Rockville, Maryland, 20852. The event raised funds ... been wounded in battle and their families. Venture Construction Group is a 2016 Silver ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... June 24, 2016   Pulmatrix, Inc ., (NASDAQ: ... innovative inhaled drugs, announced today that it was added ... reconstituted its comprehensive set of U.S. and global ... is an important milestone for Pulmatrix," said Chief Executive ... awareness of our progress in developing drugs for crucial ...
(Date:6/23/2016)... , June 23, 2016 Any dentist who ... challenges of the current process. Many of them do not ... the technical difficulties and high laboratory costs involved. And those ... offer it at such a high cost that the majority ... Dr. Parsa Zadeh , founder of Dental ...
(Date:6/23/2016)... , June 23, 2016 ... CAPR ), a biotechnology company focused on the ... announced that patient enrollment in its ongoing randomized ... has exceeded 50% of its 24-patient target. Capricor ... the third quarter of 2016, and to report ...
Breaking Medicine Technology: