The patch uses microneedles to deliver interleukin-4 to the injured heart surface. Each tiny needle has particles loaded with IL-4. When the patch sits on the heart, the needles dissolve and release the drug into damaged tissue. The findings appear in Cell Biomaterials. Huang says the patch acts like a bridge and reaches muscle under the outer layer.
The patch makes immune cells called macrophages switch to a healing state. This reduces scar tissue and helps heart function recover. Researchers also found that heart muscle cells communicated more with nearby endothelial cells, which line blood vessels. The patch lowered inflammatory signals and raised NPR1 signaling. At present surgeons place the patch with open-chest surgery. Huang wants a version that doctors can deliver through a small tube to make treatment less invasive.
Difficult words
- patch — A small piece used for fixing or helping something.
- molecule — A very small part of a substance.
- heal — To make healthy again or reduce harm.healing
- tissue — Groups of cells that work together in the body.
- scar — A mark left on the skin after healing.scar tissue
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- How do you think new medical technologies can help healing?
- Why is it important to focus on specific organs like the heart?
- What other treatments do you know for heart problems?
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