Australian scientists, have developed a new drug that offers treatment for people suffering from diabetic retinopathy, the main cause of blindness from diabetes.
The debilitating disease occurs when tiny blood vessels in the retina, responsible for detecting light, leak fluid or haemorrhage. novel drug CD5-2, which in mouse models was found to mend the damaged blood retinal barrier and reduce vascular leakage.
While treatment options include laser surgery or eye injections of anti-vascular endothelial growth factor (VEGF), they are not always effective or can result in side effects, highlighting the need for alternative therapeutic approaches.
The team from the Centenary Institute in Sydney developed a novel drug CD5-2, which in mouse models was found to mend the damaged blood retinal barrier and reduce vascular leakage.
Lead author of the study, Ka Ka Ting, said,
We believe CD5-2 could potentially be used as a stand-alone therapy to treat those patients who fail to respond to the anti-VEGF treatment. It may also work in conjunction with existing anti-VEGF treatments to extend the effectiveness of the treatment.
The key process involved in diabetic retinopathy pathology is the breakdown of the blood-retinal barrier (BRB), which is normally impermeable. Its integrity relies on how well capillary endothelial cells are bound together by tight junctions. If the junctions are loose or damaged, the blood vessels can leak.
In the study, reported in the journal Diabetologia, CD5-2 was found to have therapeutic potential for individuals with retinal diseases caused by vascular leaks, based on its ease of delivery and ability to reverse vascular dysfunction as well as inflammatory aspects of retinopathy.
Previous studies have shown that CD5-2 can have positive effects on the growth of blood vessels.
According to Professor Jenny Gamble, head of Centenary’s Vascular Biology Programme,
This drug has shown great promise for the treatment of several major health problems in the eye and in the brain.
The researchers now plan to conduct a full-scale clinical trial, Gamble said.>