First patient treated with first-ever gene fix for deadly rare disease

I recently watched a Youtube video about a new kind of personalized gene editing. I looked up articles about this advance and discovered that doctors at the Children’s Hospital of Philadelphia applied customized CRISPR gene-editing treatment to rescue a baby who had a rare and lethal genetic disorder. This success not only offers hope for families dealing with rare disease but also signals a future for new precision medicine.

irishtimes.com

Baby KJ Muldoon was diagnosed with carbamoyl-phosphate synthetase 1 deficiency, a metabolic disorder in the urea cycle, the body’s natural process for removing ammonia. The disease causes ammonia accumulation in the blood that can lead to irreversible brain damage and death. The disease is so uncommon that it affects only 1 in every 1.3 million people, and it so deadly that it kills nearly half of the infants it affects.

Normally, patients with this condition undergo high-risk liver transplants, which come with drawbacks their entire life. But for KJ, researchers saw an opportunity to revolutionize treatment through gene editing.
Doctors took an different approach by using base-editing therapy, a treatment method that modifies the baby’s genetic code rather than replacing entire genes to treat the disease. Scientists used lipid nanoparticles, which are a special delivery system, to transport the gene editors that are used for correcting the mutation responsible for this disorder.

This approach is remarkable because it wasn’t a general CRISPR treatment, it was designed only for KJ. If scientists refine this method, it could potentially create safer, faster, and more precise treatments for genetic diseases that have limited, invasive, or risky options. Moving away from transplants and into new scientific medicinal breakthroughs like this one.

This breakthrough isn’t just about treating rare metabolic disorders, it represents a new way gene editing can be used for medicine. One of the first thoughts that came to my mind was how this technique could be used for cancer treatment, where doctors could use this technique to correct genetic mutations that cause tumor growth. Instead of using aggressive therapies like chemotherapy, targeted gene editing could precisely replace cancerous mutations with healthy DNA, opening the door to more effective and less invasive treatments.