Researchers at King’s School London have recognized a stunning new therapeutic mechanism for a kind of coronary heart failure referred to as coronary heart failure with preserved ejection fraction (HFpEF), a situation that impacts practically half of all coronary heart failure sufferers and has lengthy resisted efficient therapy. Their outcomes present that urolithin A — a compound produced when intestine micro organism break down substances present in pomegranates, walnuts, and berries — can enhance coronary heart perform in mice with a situation designed to carefully mimic human HFpEF.
Urolithin A is a metabolite compound produced when intestine micro organism break down ellagitannins and ellagic acid, that are present in meals like pomegranates, berries, and walnuts. Picture credit score: Albrecht Fietz.
HFpEF is marked by a stiffened coronary heart that struggles to calm down and fill with blood between beats, although its pumping energy stays regular.
In contrast to different types of coronary heart failure, it has confirmed notoriously troublesome to deal with: main scientific trials of medicine concentrating on nitric oxide signaling pathways have largely failed to enhance affected person outcomes.
“HFpEF accounts for practically half of all coronary heart failure instances and is related to substantial morbidity and mortality,” mentioned Dr. Joseph Burgoyne of King’s School London and colleagues.
“This prevalent situation is difficult to deal with resulting from its advanced pathophysiology, which is predominantly characterised by diastolic dysfunction.”
“This dysfunction impairs ventricular leisure and filling, usually exacerbated throughout bodily exertion, highlighting a restricted cardiovascular reserve capability, significantly in older people.”
In a brand new examine, Dr. Burgoyne and co-authors targeted on a protein referred to as PKGIα, which performs a central function in coronary heart and blood vessel leisure.
Earlier work by the group had proven {that a} particular web site on the protein, a cysteine molecule referred to as Cys42, can activate the protein when chemically modified.
Testing a panel of pure plant compounds, the researchers discovered that urolithin A activated PKGIα by means of a beforehand unrecognized mechanism, immediately modifying the Cys42 web site with out triggering the disulfide bonding seen with associated compounds like quercetin.
In mice with diet- and hormone-induced HFpEF, every week of urolithin A therapy improved measures of diastolic coronary heart perform, lowered coronary heart enlargement and fibrosis, and elevated the animals’ working exercise.
These advantages disappeared in genetically modified mice missing a practical Cys42 web site, confirming the impact relied on this particular mechanism.
Urolithin A additionally improved contraction and leisure velocity in coronary heart tissue grown from human stem cells, suggesting attainable relevance to human sufferers.
“This kind of coronary heart failure stays one of the difficult types of coronary heart illness to deal with,” Dr. Burgoyne mentioned.
“Our findings establish a very new therapeutic goal and present that urolithin A can activate this pathway to enhance coronary heart leisure and cut back illness severity.”
“This raises the thrilling risk of growing new remedies that enhance scientific outcomes and high quality of life for individuals residing with the situation.”
“Whereas there isn’t sufficient proof to recommend that individuals ought to eat pomegranates to deal with coronary heart failure, these findings elevate the chance that dietary approaches that improve urolithin A manufacturing could assist alleviate this situation.”
“HFpEF makes up roughly half of all coronary heart failure instances within the UK, and could be debilitating,” mentioned Professor James Leiper, director of analysis on the British Coronary heart Basis.
“This early-stage examine in experimental fashions means that urolithin A could assist to enhance the guts tissue’s capability to calm down and fill with blood between beats, decreasing the dangerous adjustments to the guts muscle seen in HFpEF.”
“Whereas these findings are promising, the advantages have thus far been seen in animals and engineered human tissue, so scientific trials involving individuals are wanted to check if this strategy is efficient for sufferers.”
“Within the meantime, a wholesome, balanced weight-reduction plan stays the most effective methods to take care of your coronary heart.”
“Consuming loads of fruit and greens is linked to higher coronary heart well being, however it’s vital to do not forget that no single meals can stop or deal with coronary heart illness by itself.”
The study was printed this week within the journal Science Advances.
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Jie Su et al. 2026. Concentrating on PKGIα Cys42 attenuates cardiac dysfunction in coronary heart failure with preserved ejection fraction. Science Advances 12 (34); doi: 10.1126/sciadv.aec8088
