Two items relevant to long COVID

One of the tricky issues in studying in long COVID is: how widely do researchers cast their net? Initial reports acknowledged that people who were hospitalized and in intensive care may take a while to get back on their feet. But the number of people who had SARS-CoV-2 infections and were NOT hospitalized, yet experienced lingering symptoms, may be greater. A recent report from the United Kingdom, published in PLOS Medicine, studied more than Read more

All your environmental chemicals belong in the exposome

Emory team wanted to develop a standard low-volume approach that would avoid multiple processing steps, which can lead to loss of material, variable recovery, and the potential for Read more

Signature of success for an HIV vaccine?

Efforts to produce a vaccine against HIV/AIDS have been sustained for more than a decade by a single, modest success: the RV144 clinical trial in Thailand, whose results were reported in 2009. Now Emory, Harvard and Case Western Reserve scientists have identified a gene activity signature that may explain why the vaccine regimen in the RV144 study was protective in some individuals, while other HIV vaccine studies were not successful. The researchers think that this signature, Read more

metformin

Possible diabetes drug/stent interaction

Diabetes and heart disease often intersect. Emory cardiologist Aloke Finn and his colleagues recently had two papers in the Journal of the American College of Cardiology and in Atherosclerosis describing a possible interaction between the widely used diabetes drug metformin and drug-eluting stents, which are used to to treat coronary artery disease. Anwer Habib, MD is the first author of both papers.

The stent props the once-blocked artery open while the drugs in the stents are supposed to prevent the artery from becoming blocked again. The drugs — usually mTOR inhibitors such as http://www.magliettedacalcioit.com everolimus or the newer zotarolimus — slow down cell growth, but this cuts both ways. The drugs slow down the recovery of the lining of the blood vessel and this may contribute to blood clot formation after stent placement.

In cultured human cells and in rabbits with implanted stents, Finn and colleagues showed that metformin augmented the effect of mTOR inhibitors on regrowth of the blood vessel lining. (However — the authors acknowledge that their animal model was not diabetic or atherosclerotic.)

The findings could mean that people taking metformin would need to take medications to prevent blood clotting medications for a longer time after stent placement. The authors say that clinical studies following patients who receive drug-eluting stents should look at metformin’s effects on blood clotting events. A study examining drug eluting stents in diabetic patients is in the works at Emory.

 

Posted on by Quinn Eastman in Heart Leave a comment