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Published on: September 3, 2020
Cell therapy for age-related disorders: myocardial infarction and stroke--a mini-review
Brent A Williams1, Armand Keating
1Cell Therapy Program, Princess Margaret Hospital, Ontario Cancer Institute, Toronto, Ontario, Canada. brentw@uhnres.utoronto.ca
Insights
Cell therapy shows promise for heart attack and stroke recovery. While some studies improve heart function, stroke treatments are still in early stages, demonstrating safety and initial benefits.
Area of Science:
- Regenerative Medicine
- Cardiovascular Research
- Neurology
Background:
- Cardiovascular and cerebrovascular diseases are leading causes of death and disability in the elderly.
- Hematopoietic stem and progenitor cell (HSPC) transplantation is established for various diseases.
- Emerging research explores stem cells in the heart and brain for therapeutic applications.
Purpose of the Study:
- To review clinical evidence for cell therapies in myocardial infarction and stroke.
- To assess the efficacy and safety of stem cell treatments for these conditions.
Main Methods:
- Systematic literature review of clinical trials.
- Identification of studies using cell therapies for myocardial infarction and stroke.
Main Results:
- Granulocyte colony-stimulating factor mobilization of HSPC showed no benefit for acute myocardial infarction.
- Direct HSPC delivery improved hemodynamic endpoints (e.g., ejection fraction) in myocardial infarction.
- One trial showed improved clinical outcomes (death, re-infarction, heart failure) for myocardial infarction.
- Early stroke trials with various cell types (HSPC, mesenchymal stromal cells) show safety and some benefits.
Conclusions:
- Cell therapy can improve hemodynamic parameters in myocardial infarction patients.
- Cell therapy for stroke is an emerging field with preliminary evidence of safety and efficacy in small trials.
Background:
The leading causes of death and disability in the elderly are from cardiovascular and cerebrovascular diseases. The biological role of stem cells in the hematopoietic system has been well characterized and has led to the development of hematopoietic stem and progenitor cell (HSPC) transplantation for the treatment of numerous malignant and nonmalignant diseases. More recently, stem cells have been found in many other tissues of the body including the heart and brain. As the field of stem cell biology has progressed, cell therapies for the treatment of myocardial infarction and stroke have been tested in early stage clinical trials using a variety of cellular agents.
Objective:
To review the clinical evidence supporting the role of cell therapies for myocardial infarction and stroke.
Methods:
A systematic review of the literature was conducted to identify clinical trials using cell therapies for myocardial infarction and stroke.
Results:
Clinical trials of granulocyte colony-stimulating factor to mobilize HSPC after percutaneous coronary intervention for acute myocardial infarction have not shown clinical benefit. Direct delivery of HSPC to coronary arteries supplying the infarcted region using percutaneous coronary intervention does improve hemodynamic endpoints such as left ventricular ejection fraction in many studies. One randomized trial demonstrated improvement in clinically meaningful endpoints such as death, recurrence of myocardial infarction and re-hospitalization for heart failure. Several small trials of cell therapy for stroke have been reported, including cytokine-mobilized HSPC, mesenchymal stromal cells and cell lines transplanted stereotactically into the region affected by stroke.
Conclusions:
In some prospective randomized trials, cell therapy for myocardial infarction leads to improvement in hemodynamic parameters. Cell therapy for stroke is a relatively new area of translational and clinical research with preliminary studies showing safety and some measurable benefit in small numbers of subjects.
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