“Beetroot pill” could help save reduce the risk of kidney failure after heart x-ray

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22 Feb 2018 --- The humble beetroot may be the key to reducing the risk of kidney failure in patients having a heart x-ray. This is according to research led by Queen Mary University of London, which has embarked on a new research project funded by national charity Heart Research UK will look into whether dietary inorganic nitrate found commonly in beetroot could be used in pill form to prevent one of the most common causes of kidney failure in hospital.

Coronary angiography is a type of x-ray test which is used to look at the coronary arteries in the heart and diagnose a number of heart conditions.  It can also help in the planning of procedures to widen narrowed or blocked arteries in the heart. 

During angiography, a special dye is injected into the blood so that the blood vessels can be seen. However, the dye can cause acute kidney injury, known as contrast-induced nephropathy (CIN), which is thought to be in part because it reduces levels of nitric oxide in the kidneys.
Dietary nitrate, found in abundance in vegetables such as beetroot, can increase levels of nitric oxide in the body.

“CIN is a serious consequence of coronary angiography, resulting in patients staying longer in hospitals and higher healthcare costs,” says Professor Amrita Ahluwalia, Co-Director and Professor of Vascular Pharmacology at Queen Mary’s William Harvey Research Institute.

“If we find that giving dietary nitrate in capsule form could replace the lost nitric oxide in the kidneys and prevent CIN, the benefits to patients with heart disease would be substantial including reduced rates of kidney damage, less need for treatments such as dialysis and better long-term survival.”

Ahluwalia with her colleagues Dr. Dan Jones (Senior Lecturer in Clinical Trials) and Prof Anthony Mathur (Director of Intervention, Barts Heart Centre) will divide patients into two groups, one group taking nitrate capsules and the other group taking placebo capsules that do not contain nitrate.

Kidney function will then be measured and compared in both groups before the procedure, and two days and three months after to see if dietary nitrate makes a difference.

Barbara Harpham, Chief Executive of Heart Research UK, says: “Our Translational Research Project Grants aim to bridge a gap between laboratory-based scientific research and patient care, helping benefit patients as soon as possible.”

“This exciting project has the potential to help reduce the risk of kidney damage and lead to better long-term survival for patients following coronary angiography.”

Queen Mary’s William Harvey Research Institute is just one recipient of Heart Research UK’s Translational Research Project Grants. Awarded since 2009, the national charity based in Leeds has given almost £5 million (US$6.95 million) to fund these innovative and pioneering medical research projects across the UK.

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