Medical uses and applications of stem cells Revision Notes | GCSE OCR Foundation Biology

What this lesson covers

Explore how stem cells can be used in medicine to treat conditions like diabetes and paralysis. Learn about therapeutic cloning and understand the poten...

• Explain how stem cells can be used to treat medical conditions such as diabetes and paralysis
• Describe the process of therapeutic cloning and why cloned stem cells are not rejected by patients
• Evaluate the potential risks and ethical concerns associated with stem cell treatments
• Compare the advantages and disadvantages of using stem cells in medicine

Key ideas to keep in view

Use this lesson to stay inside B2.1 Supplying the cell while connecting the detail back to the wider B2: Scaling up topic.

• B2: Scaling up
• B2.1 Supplying the cell
• GCSE OCR Foundation Biology

Lesson notes preview

Read the core explanations from Medical uses and applications of stem cells before testing yourself from memory.

• Imagine a treatment that could help paralysed patients walk again or cure diabetes without daily injections. This isn't science fiction — it's the potential of stem cell therapy. These remarkable cells hold the key to treating conditions that currently have no cure.
• Undifferentiated cells that can divide to produce more stem cells or differentiate into specialised cell types. They retain the ability to become any type of cell in the body.
• Think of stem cells as biological 'blank slates'. Unlike your muscle cells or nerve cells, which have fixed jobs, stem cells haven't decided what they want to be when they grow up. This flexibility makes them incredibly valuable for medicine.
• The key property that makes stem cells so useful is their ability to differentiate — transform into any specialised cell type your body needs. Need new heart muscle after a heart attack? Stem cells can become cardiac muscle cells. Spinal cord damaged? They can become nerve cells.
• Stem cell treatments target conditions where the body's own cells are damaged, diseased, or destroyed. Two major examples show the potential:
• Diabetes (Type 1): The immune system destroys insulin-producing cells in the pancreas. Patients need daily insulin injections to survive. Stem cells could be differentiated into new insulin-producing cells, potentially providing a permanent cure rather than lifelong management.
• Paralysis from spinal cord injury: Damaged nerve cells in the spinal cord cannot regenerate naturally. This breaks the communication between brain and muscles below the injury. Stem cells could differentiate into new nerve cells, potentially restoring this vital connection.
• Other conditions that could benefit include Parkinson's disease (replacing damaged brain cells), heart disease (replacing dead heart muscle), and blood disorders (replacing faulty blood-forming cells in bone marrow).
• Here's the catch with stem cell treatments: your immune system is designed to attack foreign cells. If we transplant stem cells from another person, your body will likely reject them, just like it would reject an organ transplant.
• The process of creating an embryo with identical genes to the patient, then harvesting stem cells from this embryo. These cells are genetically identical to the patient and won't be rejected.

Continue through the topic

Move to the related lessons or back to the topic page when you need the wider sequence before exam-style practice.