Researchers developed a simple injection that may support the heart during the vulnerable weeks after a heart attack. The treatment is given into skeletal muscle and prompts the body to release ANP, a natural hormone that reduces stress on the heart.
A study of the work in Science showed that a single dose produced ANP for several weeks. The injection uses self-amplifying RNA (saRNA), a technology related to some modern vaccines, so muscle cells make extra ANP for a limited time and the hormone travels to the heart to help repair.
The researchers say the shot could reduce scarring, preserve healthy heart muscle, improve pumping function and lower long-term complications. Before human trials, the team will test safety, timing and dosing.
Difficult words
- vulnerable — easily harmed or needing protection
- skeletal muscle — muscle attached to bones used for movement
- hormone — chemical from the body that controls activity
- self-amplifying RNA — RNA that makes more copies inside cells
- scar — mark left on tissue after injury healsscarring
- preserve — keep something in its original or good condition
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Discussion questions
- How could a short-term injection that increases ANP change recovery after a heart attack for patients?
- What safety, timing, or dosing concerns should researchers check before they try this treatment in people?
- Would being treated by an injection into muscle feel more acceptable than a treatment given directly to the heart? Why or why not?
