Rheumatic diseases are a broad group of chronic conditions that affect the joints, muscles, bones, ligaments, and sometimes internal organs. They are usually the result of a malfunctioning immune system that attacks healthy tissues. This leads to inflammation, pain, stiffness, and, in some cases, permanent organ damage. Common conditions in this group include rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), systemic sclerosis (SSc), osteoarthritis (OA), ankylosing spondylitis (AS), and osteoporosis (OP).
These illnesses can significantly reduce a person’s quality of life. Many people face persistent pain, fatigue, and reduced mobility, as well as the emotional challenges of living with a lifelong condition. While current treatments such as anti-inflammatory drugs, immunosuppressants, and biologic medications help manage symptoms, they do not cure the disease. They also come with risks of side effects and may not provide enough relief for everyone.
As part of this review, Hetta et al. summarize the clinical progress of MSC therapy in rheumatic diseases, highlight key findings from preclinical and clinical studies, and discuss challenges and future directions.
Role of Mesenchymal Stem Cell Therapy in Rheumatic Disease Management
Stem cells are unique because they can renew themselves and develop into many different types of cells. Mesenchymal stem cells, or MSCs, are a type of adult stem cell that can be found in bone marrow, fat tissue, umbilical cord blood, and even skin.
MSCs are particularly interesting to researchers because they can transform into bone, cartilage, and adipose cells. They also release natural substances that reduce inflammation, calm the immune system, and support healing. These qualities make them an appealing option for treating autoimmune and inflammatory diseases such as rheumatic conditions.
Why MSCs May Help Rheumatic Diseases
In rheumatic diseases, the immune system mistakenly attacks the body’s own tissues. This sets off cycles of inflammation and damage. MSCs may help by calming the overactive immune response, encouraging the growth of protective immune cells, and releasing growth factors that repair damaged tissues.
Rather than only masking symptoms, MSC therapy aims to restore balance to the immune system and support long-term improvement. This is why it has attracted so much attention in both laboratory research and clinical trials.
Promising Results Across Rheumatic Diseases
According to the authors, research into mesenchymal stem cells (MSCs) has shown encouraging results across a variety of rheumatic diseases where current treatments often fall short. Specifically:
- In lupus, MSCs appear to calm harmful immune cells, promote regulatory ones, and reduce kidney inflammation, with early trials showing improvement in patients resistant to standard drugs.
- In rheumatoid arthritis, studies suggest MSCs can lower inflammatory signals, protect cartilage, and ease symptoms, particularly in severe cases. Ankylosing spondylitis, which mainly affects the spine, may also benefit from MSC therapy, as both animal and small human studies indicate reduced inflammation and pain.
- For osteoarthritis, MSCs may help repair cartilage and ease joint pain, with clinical trials reporting improved function in the knees and hips.
- Osteoporosis research shows MSCs may encourage bone-building cells and inhibit bone breakdown, with exosome-based approaches offering a potential “cell-free” treatment.
- In systemic sclerosis, MSCs have been linked to reduced scarring and improved skin and organ function.
- In rare muscle disorders like dermatomyositis and polymyositis, early studies suggest gains in muscle strength and healing where conventional therapies have failed.
Together, these findings highlight MSCs as a promising new approach across a wide spectrum of autoimmune and degenerative conditions, though more large-scale and long-term studies are needed.
Ongoing Challenges and Emerging Strategies in MSC Therapy
Despite encouraging progress, MSC therapy still faces challenges. Hetta et al. report that results are not consistent, and not every patient responds the same way. The source of MSCs, the number of cells given, and the method of delivery can all affect outcomes.
Another challenge highlighted by the authors is standardization. To move MSC therapy into widespread use, researchers need to agree on best practices for collecting, preparing, and administering these cells.
Future approaches may involve combining MSC therapy with existing medications, engineering MSCs to work more effectively, or using MSC-derived exosomes as a safer alternative to full cell transplantation.
Therapeutic Promise and Future Outlook for Rheumatic Diseases
Mesenchymal stem cells represent one of the most exciting possibilities for treating rheumatic diseases. Research so far shows potential benefits for conditions such as lupus, rheumatoid arthritis, osteoarthritis, osteoporosis, systemic sclerosis, ankylosing spondylitis, and inflammatory muscle diseases. Unlike traditional medications that only ease symptoms, MSCs may help restore immune balance and encourage tissue repair.
While more research is needed to understand the long-term effects and best methods, MSC therapy offers real hope to millions of people living with painful and disabling conditions. With continued progress, the authors believe that it may one day change the way these chronic diseases are treated and give patients new opportunities for healing and improved quality of life.
Source: Hetta HF, Elsaghir A, Sijercic VC, Ahmed AK, Gad SA, Zeleke MS, Alanazi FE, Ramadan YN. Clinical Progress in Mesenchymal Stem Cell Therapy: A Focus on Rheumatic Diseases. Immun Inflamm Dis. 2025 May;13(5):e70189. doi: 10.1002/iid3.70189. PMID: 40353645; PMCID: PMC12067559.
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