Key Finding
Moxibustion significantly improved cardiac function and reduced myocardial fibrosis in post-MI heart failure rats by suppressing autophagy-mediated ferroptosis through downregulation of NCOA4 and upregulation of GPx4.
Researchers investigated whether moxibustion, a traditional Chinese therapy that uses heated mugwort, could help improve heart function after a heart attack. Heart failure following a heart attack involves scarring and damage to heart tissue, and this study explored how moxibustion might protect the heart at a cellular level.
The research team used laboratory rats with heart failure after induced heart attacks. Some rats received moxibustion treatment, while others received standard medical interventions or no treatment. The researchers measured heart function using ultrasound and examined heart tissue under microscopes to understand cellular changes.
The study found that moxibustion significantly improved heart pumping ability and reduced harmful scarring in heart tissue. At the cellular level, moxibustion appeared to work through two important mechanisms: it reduced excessive autophagy (a process where cells break down their own components) and prevented ferroptosis (a type of cell death involving iron and fat damage). Specifically, moxibustion decreased levels of free iron in heart cells, reduced fat damage, and increased protective proteins that help cells survive.
The improvements in heart tissue structure and function suggest moxibustion may offer therapeutic benefits for patients recovering from heart attacks. The treatment appeared to protect heart muscle cells from damage and reduce the formation of scar tissue that impairs heart function. While these results are promising, this was an animal study, and human clinical trials would be needed to confirm these benefits in patients with heart failure. Anyone interested in moxibustion for cardiovascular conditions should consult with a qualified, licensed acupuncturist and coordinate care with their cardiologist.
This preclinical study examined moxibustion's cardioprotective mechanisms in post-myocardial infarction heart failure (post-MI HF) rats. Researchers used echocardiography, histopathology, transmission electron microscopy, Western blotting, and RT-qPCR to assess cardiac function and molecular changes. Moxibustion treatment significantly improved left ventricular ejection fraction and fractional shortening while reducing myocardial fibrosis. At the molecular level, moxibustion decreased co-localization of NCOA4 and LC3, reduced intracellular free iron, downregulated NCOA4 expression, upregulated GPx4, and decreased lipid peroxidation markers. The study demonstrated that moxibustion alleviates excessive autophagy and inhibits ferroptosis—a novel iron-dependent form of regulated cell death. When autophagy was pharmacologically activated with rapamycin, NCOA4 expression increased and ferroptosis was promoted; moxibustion counteracted these effects. Clinical implications suggest moxibustion may offer therapeutic benefit in post-MI heart failure by modulating the autophagy-ferroptosis axis, warranting further investigation in human trials for cardiovascular applications.
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