Modern medicine has dramatically improved survival after heart attacks by quickly reopening blocked arteries.
However, many survivors later develop heart failure because the healing process leaves behind stiff scar tissue that weakens the heart muscle. Doctors currently have very few treatments that directly target this scarring process.
A research team at Uppsala University believes they may have found a new solution. They have created a biological therapy that works with the body’s own healing system instead of simply treating symptoms after damage has already occurred.
The therapy uses tiny natural particles called exosomes, which are collected from laboratory-grown bone marrow stromal cells donated by healthy people. These microscopic particles carry messages between cells and help regulate inflammation throughout the body.
After a heart attack, inflammation is necessary for repair, but excessive inflammation can produce too much scar tissue. The researchers found that exosomes appear to reduce this harmful response by encouraging immune cells to promote healing instead of prolonged inflammation.
The treatment is intended to be delivered directly into the coronary artery during balloon angioplasty, when doctors reopen the blocked blood vessel. Delivering the therapy at this early stage may help protect the heart before extensive scarring develops.
In laboratory studies involving both small animals and pigs, the treatment reduced scar formation and helped maintain heart function. Because exosomes can be frozen, stored, and thawed when needed, they may also be easier and less expensive to use than treatments based on living cells.
The researchers also developed a new PET scan that can detect the cells responsible for ongoing scar formation inside the heart. This gives doctors a way to monitor healing instead of relying only on symptoms or standard heart scans.
In an early clinical investigation, some patients still showed active scarring two months after their heart attack, while others had largely healed. This raises the possibility of identifying patients who would benefit most from additional treatment rather than giving the therapy to everyone.
The scientists also believe the same anti-inflammatory approach might eventually help treat stroke, severe lung inflammation, or even improve outcomes after organ transplantation. Much more research will be needed before these possibilities can be confirmed.
The findings were published in Cell Stem Cell. While the results are highly promising, they are based mainly on preclinical studies and early human imaging data, so careful clinical trials remain essential before the treatment can become widely available.
Nevertheless, the combination of a new biological medicine and advanced PET imaging offers a fresh strategy for preventing heart failure after heart attacks rather than simply managing its consequences.
If you care about heart health, please read studies about how eating eggs can help reduce heart disease risk, and Vitamin K2 could help reduce heart disease risk.
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Source: Uppsala University.
