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Clinical trial finds cell therapy improves quality of life in advanced heart failure

2023-12-12
(Press-News.org) ROCHESTER, Minn. — Stem cell-based therapy improved quality of life for patients with advanced heart failure, Mayo Clinic researchers and international collaborators discovered in a late-stage multinational clinical trial. In one of the largest studies of cell intervention after a heart attack, patients reported their daily hardship lessened when stem cells optimized for heart repair supplemented standard of care. This clinical study further documented lower death and hospitalization rates among those treated with cell therapy. This research is published in Stem Cells Translational Medicine.

"In this era of global aging, people live longer, yet are at risk of chronic disease imposing a poor quality of life. Heart failure is an emerging epidemic in need of new healing options," says Andre Terzic, M.D., Ph.D., a Mayo Clinic cardiovascular researcher and lead author on the paper. "The stem cell-based approach in the present study demonstrates sustained benefit on physical and emotional health in response to biotherapy." Dr. Terzic is the Marriott Family Director, Comprehensive Cardiac Regenerative Medicine for the Center for Regenerative Biotherapeutics.

Approximately 800,000 people in the U.S. suffer heart attacks every year. Damage to cardiac muscle weakens the heart's ability to pump blood through the body, leading to heart failure — a debilitating and life-threatening disease. People with heart failure often suffer a diminished quality of life associated with shortness of breath, fatigue, swollen legs and limited daily activities. Standard of care for heart failure includes a heart-healthy diet and habits, medications, implantable devices, and rehabilitation. However, current regimens do not work for everyone, especially in advanced disease stages.

The research

The study team recruited 315 patients from 39 hospitals in 10 countries who had advanced heart failure despite receiving standard of care. Patients were randomly divided into groups that would receive stem cell therapy versus those who would not. Patients assigned to cell treatment underwent cardiac catheterization. Then, stem cells taken from their own bone marrow and programmed to heal damaged heart tissue were delivered to the heart. Patients assigned not to receive stem cells had cardiac catheterization without cell delivery — known as the sham treatment.

All participants were asked to complete a 21-question self-assessment at the beginning of the study and then again at 26-, 39- and 52-weeks following treatment. For each question, they rated their physical, behavioral and emotional states on a scale of 0 to 5.

During the one-year follow-up, patients with preexisting left cardiac chamber enlargement consistently reported improved quality of life after cell therapy over those who received the sham treatment. In parallel, lower death and hospitalization rates were recorded among those who received stem cells.

"Data from one of the largest cardiovascular cell therapy trials, testing a regenerative technology discovered at Mayo Clinic, indicate benefit in both quantity and quality of life in advanced heart disease," says Satsuki Yamada, M.D., Ph.D., a Mayo Clinic cardiovascular researcher and first author on the study. "The benefit of regenerative care has been typically evaluated on the basis of clinician-reported outcomes. What's unique in this study is that it was designed to listen to the patient's experience."

This clinical trial was conducted in a double-blinded fashion, with both participants and their healthcare professionals masked during the study assignment. A double-blind study is designed to reduce the risk of bias when evaluating patient outcomes.

Further independent clinical studies are needed to validate the findings of this research.

Marriott Family Foundation and National Institutes of Health (R01 HL 134664) provided funding. The Mayo Clinic Van Cleve Regenerative Medicine Program, Gerstner Family Foundation, Tanoto Foundation, and Mayo Clinic Center for Regenerative Biotherapeutics provided additional support.

Review the study for a complete list of authors, disclosures and funding.

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About Mayo Clinic  
Mayo Clinic is a nonprofit organization committed to innovation in clinical practice, education and research, and providing compassion, expertise and answers to everyone who needs healing. Visit the Mayo Clinic News Network for additional Mayo Clinic news. 

About Mayo Clinic's Center for Regenerative Biotherapeutics
Mayo Clinic's Center for Regenerative Biotherapeutics seeks to integrate, develop and deploy new regenerative medicine products and services that continually differentiate Mayo's practice to draw patients from around the world for complex care. Learn more on Mayo Clinic's Center for Regenerative Biotherapeutics website.

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[Press-News.org] Clinical trial finds cell therapy improves quality of life in advanced heart failure