Introduction
In the evolving landscape of regenerative medicine, mesenchymal stem cells (MSCs) are redefining the treatment for chronic diseases at a cellular level.
MSCs reside in various tissues like the umbilical cord, adipose tissue, bone marrow or dental pulp. These are multipotent cells that can dedifferentiate into mesoderm lineage, such as chondrocytes, adipocytes, and osteoblasts. Mesenchymal Stem Cells exhibit other properties, including anti-inflammation, immunomodulation, creating a supportive environment, etc.
Let’s delve deeper into the clinical application and mechanism that place MSCs as the forefront players in regenerative medicine.
What Are Mesenchymal Stem Cells?
MSCs are stromal cells that possess self-renewal properties and exhibit multilineage differentiation. ‘Mesenchymal’ belongs to the embryonic origin that arises from the mesoderm germ layer. Mesoderm lineage is responsible for forming connective tissue, such as muscle, cartilage, bone, fat, blood vessels, the urogenital system, and blood cells.
International Society for Cellular Therapy’s Mesenchymal and Tissue Stem Cell Committee marked the core characteristic of MSCs as:
- Mesenchymal stem cells are adherent to the coated surface.
- Surface biomarkers expressed in MSCs include CD105, CD73, CD90, the negative markers includes CD14/CD11b, CD34, CD45, CD79α/ CD19, and HLA-DR
- In in-vitro conditions, MSCs differentiate into osteoblasts (bone), chondroblasts (cartilage), and adipocytes (fat).
What are the Differentiation Potentials of MSCs?
Researchers reported MSCs’ capability to differentiate into distinct cell types:
- Adipocytes (fat cells)
- Chondrocytes (cartilage cells)
- Osteoblasts (bone cells)
- Neurocytes (nerve cells)
- Myocytes (Muscle cells)
- Hepatocytes (liver cells)
- Cardiomyocytes (heart muscle cells)
- Pancreatic cells
- Epithelial cells
- Endothelial cells
Differentiation Potential of Mesenchymal Stem Cells
*NOTE: MSCs’ differentiation potential depends on stimulation and the microenvironment where they are grown.
What Cellular or Molecular Mechanisms Influence Differentiation?
MSCs’ differentiation into specialized cells is influenced by complex genetic and environmental factors. Expression of specific transcription factors, epigenetic modification (DNA methylation or histone modification), or mRNA expression influences cell types. The differentiation occurs at multiple stages:
- Specific gene activation
- Cell proliferation initiation and formation of specific cell types
- Cell maturation and development of functional cells
What are the Sources of MSCs Isolation?
The isolation of MSCs is a crucial process for maintaining their quality and efficacy. The isolation is performed in sterile conditions. The isolated cultures are maintained in a CO2 incubator that supplies 5% CO2, 37°C and relative humidity. Following the isolation process, the cells are tested for the presence of adequate biomarkers. Mesenchymal stem cells are isolated from:
- Umbilical Cord Tissue
- Umbilical cord blood
- Adipose Tissue
- Bone marrow
- Peripheral Blood
- Synovial Fluid
- Dental Pulp
- Placental Tissue
What is the Primary Function of MSCs?
- Cell Differentiation: MSCs differentiate into distinct cell types depending on stimulation
- Tissue Regeneration: Regeneration of specific cell types replaces damaged or dead cells
- Repair Mechanism: MSCs release various growth factors and cytokines. It aids in the recruitment of other cells to the injury site. Promotes new blood vessel formation and promotes tissue repair
- Anti-Inflammation: MSCs migrate to injury or inflammatory sites, suppress T cell proliferation, and reduce the effects of proinflammatory cytokines (IL-12, TNF-α) [2]
- Immunomodulation: MSCs modulate immune networks, suppress immune response, and enable acceptance of stem cells in the body. The problems, such as autoimmune condition application, transplantation rejection, or graft-versus-host disease, are mitigated.
What are the Applications of MSCs in Modern Medicine?
The applications of stem cells in regenerative medicine is explored widely. Their functionality inside the biological system is distinct:
- Orthopedic Regeneration: MSCs enable cartilage or bone repair via chondrogenic and osteogenic differentiation
- Neurological Regeneration: MSCs promote neural repair, and they release neurotrophic factors
- Cardiovascular Repair: MSCs promote angiogenesis, enabling adequate blood, nutrient, and oxygen supply at the injured area.
- Wound Healing: MSCs stimulate fibroblast activities, promote collagen and elastin synthesis. Aids in chronic wound closure
- Autoimmune & Inflammatory Conditions: MSCs induce immunomodulatory properties. Reduces inflammation and promotes tissue damage
What are Diseases Treated by Stem Cells?
List of Diseases Treated by Stem Cells Includes:
- Neurodegenerative Conditions: Autism, Parkinson’s, Alzheimer’s, ALS, MND, Cerebral palsy, Multiple sclerosis
- Orthopedic: Osteoarthritis, Osteoporosis, Knee or Sports injury
- Anti-Aging: IV Drip, Hair Loss Treatment, Skin rejuvenation
- Autoimmune Problem: Multiple sclerosis, Rheumatoid arthritis
- Organ Specific: Chronic Lung Disease, Chronic liver disease/ Liver cirrhosis, COPD, critical limb ischemia
- Eye Disorder: Optic nerve atrophy, retinopathy, age-associated macular degeneration
- Spinal Cord Injury
- Metabolic disorder/ Diabetes
- Erectile dysfunction
*Advancells, India, is a leading stem cell research laboratory that isolates and supplies mesenchymal stem cells for various chronic diseases.
What are the Major Challenges with MSCs?
Preclinical and clinical trials revealed the safety, tolerance, and efficacy of the MSCs application for various chronic disorders. The risk of immunogenicity is relatively low. The major challenges include:
- Heterogeneity: MSCs are isolated from a distinct source (umbilical cord tissue/blood, adipose, bone marrow). Can potentially display distinct properties
- Isolation and Expansion: The MSCs’ isolation process is not standardized; replication might be challenging in certain cases.
- Standardizing Dosing and Administration: Determination of adequate dosing and administration method is tedious.
- Differential Potential: MSCs differentiate into distinct cell types; differentiation varies based on cell source and environmental conditions
- Quality Control: Standardization and scalability are tedious. The method of isolation, expansion, characterization or administration is challenging.
- Ethical and Regulatory Affairs: Lack of a clear framework related to ethical clearance and regulatory affairs
What is the Current Landscape of Stem Cell Therapy in India?
Stem Cell Therapy in India is evolving at a rapid pace. The position is transitioning from research level to evidence-based application. There is a growth of regenerative medicine centers. ICMR and CDSCO provide the ethical and regulatory landscape guidelines. The global trend reveals India as a transforming landscape for medical tourism. The factors include:
- Availability of multi-speciality hospitals, advanced treatment options, medical facilities, etc.
- Facilitating holistic treatment beginning from consultation, diagnosis, therapy, prognosis and rehabilitation centers
- Availability of qualified and experienced surgeons for performing complex procedures like stem cell therapy
- Stem cell therapy cost in India is 60-80% lower in comparison with the US pricing
Conclusion
Mesenchymal stem cells have transformed the regenerative medicine landscape. MSCs can differentiate into distinct cell types. It introduces regeneration, repair, and replacement of the damaged or dead tissue. The unique combination of multipotency, anti-inflammation, immunomodulation, and secretome activities makes these a versatile therapeutic option. Regenerative medicine is paving the way for new hope for patients with chronic health issues. In future, there is a need to launch large-scale clinical trials to ensure long-term effects.
References
- Pountos I. Mesenchymal stem cells. Adult Stem Cells: Recent Advances. SM Group. 2017:1-5.
- Planat-Benard V, Varin A, Casteilla L. MSCs and inflammatory cells crosstalk in regenerative medicine: concerted actions for optimized resolution driven by energy metabolism. Frontiers in immunology. 2021 Apr 30;12:626755.
FAQ’s
Q- What are the Applications of MSCs?
MSCs play a pivotal role in regenerative medicine. The major areas of application include neurodegenerative disease, orthopedic repair, cardiovascular regeneration, autoimmune conditions, skin and hair rejuvenation, and wound healing.
Q- How Does Stem Cell Therapy Work?
Stem cell therapy enables the regeneration of damaged and dead cells. Other mechanisms include the paracrine effect, that is, they promote cell-to-cell communication, anti-inflammation, immune modulation, and create a supportive environment.
Q- How is Stem Cell Therapy in India Regulated?
Currently, stem cell therapy in India is growing rapidly in terms of research and clinical application. It is regulated by ICMR and CDSCO guidelines. Most of the therapies are under clinical trials or approved procedures.
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