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Waste from the food chain could hold the clue to treating eye infections worldwide
A new laboratory model that can be used to test treatments for preventing and curing eye infections caused by fungi, bacteria and viruses while also reducing the number of animals used in medical research has been developed by researchers, including from India, at the University of Sheffield in the UK. The breakthrough, which will be used to develop novel alternatives to antibiotics to reduce the emergence of antibiotic-resistant superbugs, has been made by engineers and scientists working together at the University of Sheffields Collaboratorium for Antimicrobial Resistance and Biofilms (SCARAB).
In some developing countries, eye infections pose a significant threat resulting in vision impairment or even blindness. Currently, around 285 million people globally are visually impaired and seven million people lose their eyesight each year. Over 90 percent of people affected are from developing countries, according to a press release from the university.
In approximately 80 per cent of these people, the loss of eyesight can be easily avoided with bespoke healthcare solutions that fit with the unique socio-economic conditions prevalent in developing countries.
Using the ex vivo porcine eye model - the eyes of pigs which are deemed as waste by the food industry - researchers can mimic infection in human eyes.
The cornea is the transparent portion in the front of the eye that allows us to see.
Using the ex vivo porcine models researchers were able to study ulcer formation and the development of opacity which leads to the loss of vision in humans.
The new model, which is being developed by PhD researcher Katarzyna Okurowska, gives a better prediction of how effective the newly developed treatments are likely to be in humans.
Such data is currently obtained from expensive and highly-regulated animal research, which must precede any human clinical trials before the treatment can be made available to patients.
The availability of the model will immediately help to reduce and refine the use of animals in medical research, and may one day help to completely replace the use of animals in this kind of study.
The added advantage of the ex vivo porcine eye model is that it uses waste from the food chain.
As the eyes are a waste product, no animals are specifically bred for the study, helping to reduce the numbers of animals needed to conduct research.
Project lead, Professor Peter Monk from the University of Sheffields Department of Infection, Immunity and Cardiovascular Disease, said: Eye infections are a major cause of vision loss worldwide.
Loss of vision leads to a reduction in the quality of life and impairs the economic productivity of the individual and the nation.
There is a need for effective and affordable treatments that can prevent its occurrence, and so we established this model to enable the treatments that we and others are developing to reach the clinic rapidly.
Dr Esther Karunakaran, Co-Director of SCARAB from the University of Sheffields Department of Chemical and Biological Engineering, said: The model has been developed as part of a larger multidisciplinary project funded by the Medical Research Council Global Challenge Research Fund (MRC-GCRF), to develop a novel treatment to prevent eye infections in the developing world.
"We are also working with the LV Prasad Eye Institute in India," she said.
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