Stem Cell Therapy: Benefits & Concerns Associated

Context (TH): Clinical trials demonstrate the safety of stem cell therapies for Parkinson’s disease.

About Stem Cell Therapy

Stem cell therapy is a clinical approach that harnesses stem cells’ regenerative and reparative potential to treat or manage various diseases and injuries.
Diseases Treated by Stem Cell Therapy: Leukemia and Lymphoma, Sickle Cell Anemia, heart disease, lymphoma, Cystic Fibrosis, Skin Diseases etc.

Tissue Regeneration: Stem cells can replace damaged or lost cells due to injury, disease, or ageing. By differentiating into specialised cells, they facilitate restoring function in affected tissues or organs.
Drug Discovery and Testing: Stem cells can be utilised to create in vitro models of human tissues, enabling researchers to test the safety and efficacy of new drugs and therapies.
- This approach reduces the need for animal testing and provides more accurate insights into potential drug interactions with human cells.
Disease Modelling: Stem cells can be used to generate disease-specific cell lines, enabling researchers to study disease progression and identify potential therapeutic targets.
Gene Therapy and Genetic Editing: Stem cells can be genetically modified to correct mutations responsible for inherited diseases.
- Techniques such as CRISPR-Cas9 allow researchers to edit specific genes in stem cells, which can then be reintroduced into the patient’s body to restore normal cellular function.
Immunotherapy: Stem cells can play a role in modulating the immune system, making them valuable in treating autoimmune diseases and preventing transplant rejection.

Risk of Immune Rejection: If the stem cells used are not derived from the patient’s own body, the immune system may recognise them as foreign and reject them, leading to complications.
Tumour Formation: Especially with embryonic stem cells and induced pluripotent stem cells (iPSCs), there is a risk of uncontrolled cell growth, which can result in tumour formation.
High Cost: Expensive, often costing tens of thousands per treatment. This makes them inaccessible for most patients, especially in low- and middle-income countries.
Ethical Issue: These cells are typically derived from human embryos, often created in laboratories for in vitro fertilization (IVF) and later discarded. Critics argue that this process destroys potential human life.

Stem cells are special cells that have the ability to develop into different types of cells in the body, such as muscle, bone, or nerve cells.
Stem cells can be administered in several ways, depending on the condition being treated:
- Intravenous (IV) Therapy: Stem cells are injected directly into the bloodstream.
- Intrathecal Administration: Stem cells are injected into the spinal canal.
- Localised Injections: Stem cells are injected directly into affected areas such as joints or muscles.

Mesenchymal Stem Cells (MSCs): These adult stem cells are found in various tissues, including bone marrow, adipose tissue, and umbilical cord tissue.
- MSCs are notable for their ability to differentiate into bone, cartilage, and muscle cells, and they pose fewer ethical concerns than embryonic stem cells.
Embryonic Stem Cells (ESCs): These pluripotent cells can differentiate into any cell type, but involve ethical considerations due to their derivation from early-stage embryos
Induced Pluripotent Stem Cells (iPSCs): These are adult cells reprogrammed to an embryonic stem cell-like state. iPSCs can differentiate into any cell type, providing a less controversial alternative to ESCs.

Parkinson’s disease is a progressive movement disorder of the nervous system. It causes nerve cells (neurons) in parts of the brain to weaken, become damaged, and die.
People with this disease lose neurons that communicate with each other using dopamine as a neurotransmitter in a part of their brains.
- These dopaminergic neurons have been found to contain aggregated masses of proteins called Lewy bodies. Most of these proteins are SNCA.
- The SNCA gene provides instructions for making a small protein called alpha-synuclein. Alpha-synuclein is abundant in the brain.
Cause: The cause of Parkinson’s disease is unknown. However, it is not contagious.
Symptoms: Tremor, slowed movement, also called bradykinesia, rigid muscles, loss of automatic movements etc.
- As symptoms progress, people with Parkinson’s disease may have difficulty walking, talking, or completing other simple tasks.
Treatment: Currently, there is no cure for Parkinson’s disease.