Fasting earlier than chemotherapy therapy has been proven to assist coronary heart cells preserve regular autophagy exercise in imaging assessments utilizing nanoparticles.
Not too long ago, a group headed by scientists at Massachusetts Basic Hospital created a nanoparticle probe that may determine indicators of chemotherapy-induced cardiac harm.
Chemotherapy for most cancers sufferers is usually a life-saving process, however a few of these drugs can hurt the guts. A group led by scientists at Massachusetts Basic Hospital (MGH) has developed a nanoparticle probe that may determine an indicator of chemotherapy-induced coronary heart harm.
Experiments utilizing the probe additionally confirmed that intermittent fasting earlier than therapy can cease the event of this coronary heart harm indicator in cancer-bearing mice, preserving cardiac perform and lengthening survival.
The analysis, which was printed in Nature Biomedical Engineering, centered on autophagy, a mechanism by way of which cells eradicate extraneous or unhealthy parts. Decreased ranges of autophagy have been linked to heart problems and different diseases, however autophagy may also be a serious driver of cell demise, creating a fragile stability between its useful and dangerous penalties.
An autophagy-detecting nanoparticle was created by David E. Sosnovik, MD, and his colleagues that permits researchers to non-invasively measure autophagy exercise throughout the physique utilizing both fluorescent or magnetic resonance imaging. Dr. Sosnovik is the director of the Program in Cardiovascular Imaging at MGH’s Martinos Heart for Biomedical Imaging.
When the scientists intravenously injected the nanoparticles into mice with most cancers, they may measure modifications in autophagy in coronary heart tissue below totally different situations, corresponding to after chemotherapy. For instance, the nanoparticles detected diminished autophagy exercise in coronary heart cells uncovered to the chemotherapy drug doxorubicin, which may trigger coronary heart harm. Nonetheless, therapy with statins or fasting earlier than doxorubicin therapy allowed the animals’ coronary heart cells to keep up regular autophagy exercise.
“We present with our nanoparticle that intermittent fasting—ingesting water however no meals for twenty-four hours earlier than the chemotherapy is given—restores autophagy, eliminates the harm to the guts muscle, and even improves general survival,” says Sosnovik, the senior creator of the examine.
Sosnovik stresses that complementary analysis in people is required, particularly because the results of fasting on autophagy in a tumor are unclear. “We aren't suggesting that sufferers as we speak quick earlier than their chemotherapy. That is one thing that can should be studied additional in managed and vigorous medical trials,” he says. “Nonetheless, our paper offers essential insights that will have an effect on medical care within the close to future.”
Additionally, the group’s autophagy-detecting nanoparticles could possibly be used to realize a greater understanding of the function of autophagy in a broad vary of ailments.
Reference: “A nanoparticle probe for the imaging of autophagic flux in dwell mice through magnetic resonance and near-infrared fluorescence” by Howard H. Chen, Zehedina Khatun, Lan Wei, Choukri Mekkaoui, Dakshesh Patel, Sally Ji Who Kim, Asma Boukhalfa, Efosa Enoma, Lin Meng, Yinching I. Chen, Leena Kaikkonen, Guoping Li, Diane E. Capen, Parul Sahu, Anand T. N. Kumar, Robert M. Blanton, Hushan Yuan, Saumya Das, Lee Josephson and David E. Sosnovik, 11 July 2022, Nature Biomedical Engineering.
DOI: 10.1038/s41551-022-00904-3
The examine was funded by the NIH/Nationwide Institutes of Well being.
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