Gene Editing: Understanding the Basics

What is Gene Editing?

Also known as genome editing.
Refers to the modification of genes, which are sections of the DNA molecules inside cells of all living organisms.
DNA is the instruction manual for organisms and influences characteristics such as height and eye color.
Genes are inherited from parents and sometimes contain errors that cause illnesses.

Humans have been modifying genes for thousands of years through crossbreeding plants to improve them.
Gene editing is a more recent development that offers increased accuracy, speed, simplicity, and cost-effectiveness.

CRISPR Technology:
- Identifies and cuts specific DNA sequences within a gene.
- Uses CRISPR to locate the DNA sequence and an enzyme called Cas9 to cut the DNA.
- The DNA can then be altered or replaced with another DNA stretch.
Functions like a 'find and replace' for genetic instructions.

Human Health:
- Could lead to significant health improvements.
- Used in 2015 to cure a baby girl's leukemia.
- Potential to fix mutations that predispose people to cancer and enable new HIV therapies.
- Could edit genes causing hereditary diseases.
Agriculture:
- Make crops more nutritious and disease-resistant.
- Enable growth in difficult conditions.
Animal Health:
- Gene editing in animals could help resist diseases.
- Example: Editing mosquitoes to prevent malaria transmission.

Possibility of editing genes in early human embryos to alter non-health related characteristics (e.g., eye color).
Raises the concept of 'designer babies', affecting not just the child but future generations.
Potential to create designer pets or develop more virulent microbial diseases.

Gene editing presents enormous positive potential but also significant ethical and societal challenges.
Important to debate and regulate the use of gene editing to avoid negative uses and maximize its life-changing benefits.