Related Experiment Video
Updated: Feb 28, 2026
A Cardiac Microphysiological System for Studying Ca2+ Propagation via Non-genetic Optical Stimulation
Published on: March 21, 2025
An innovative biologic system for photon-powered myocardium in the ischemic heart
Jeffrey E Cohen1, Andrew B Goldstone1, Michael J Paulsen1
1Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA.
Insights
This study introduces photosynthetic therapy using cyanobacteria to treat heart attack survivors. This novel approach improves cardiac function by increasing oxygenation, bypassing blood flow limitations.
Area of Science:
- Cardiovascular Science
- Biotechnology
- Microbiology
Background:
- Coronary artery disease (CAD) is a leading cause of death, affecting millions.
- Survivors often face heart failure due to microvascular deficits post-revascularization.
- Current treatments have limitations in addressing residual perfusion deficits.
Purpose of the Study:
- To present a novel therapeutic system for acute myocardial ischemia.
- To investigate the potential of photosynthetic therapy for treating heart conditions.
- To rescue cardiac tissue and improve function in ischemic heart disease.
Main Methods:
- Intramyocardial delivery of the cyanobacterium *Synechococcus elongatus*.
- Utilizing light as an energy source for photosynthesis within the myocardium.
- Assessing tissue oxygenation, myocardial metabolism, and cardiac function during and after ischemia.
Main Results:
- Photosynthetic therapy significantly increased tissue oxygenation.
- Maintained myocardial metabolism despite ischemic conditions.
- Demonstrated durable improvements in cardiac function post-ischemia.
Conclusions:
- Photosynthetic therapy offers a novel approach to treating ischemic heart disease.
- This method circumvents traditional blood flow dependency for oxygen and nutrient delivery.
- It holds potential to shift the paradigm in treating heart conditions caused by ischemia.
Abstract:
Coronary artery disease is one of the most common causes of death and disability, afflicting more than 15 million Americans. Although pharmacological advances and revascularization techniques have decreased mortality, many survivors will eventually succumb to heart failure secondary to the residual microvascular perfusion deficit that remains after revascularization. We present a novel system that rescues the myocardium from acute ischemia, using photosynthesis through intramyocardial delivery of the cyanobacterium Synechococcus elongatus. By using light rather than blood flow as a source of energy, photosynthetic therapy increases tissue oxygenation, maintains myocardial metabolism, and yields durable improvements in cardiac function during and after induction of ischemia. By circumventing blood flow entirely to provide tissue with oxygen and nutrients, this system has the potential to create a paradigm shift in the way ischemic heart disease is treated.
