Phase 1 study in The Lancet finds placenta-derived stem cells used during fetal surgery safely repair spinal damage and reverse dangerous brain changes in all six babies

Groundbreaking clinical research has demonstrated that doctors can heal spinal injury and fix linked brain disorders in babies before birth, representing a substantial advancement in foetal medicine. 

The Phase 1 trial, reported in The Lancet, coupled normal foetal surgery with placenta-derived mesenchymal stem cells (PMSCs) to treat myelomeningocele, the most severe form of spina bifida. Spina bifida is a birth abnormality that occurs when a baby's spinal cord fails to close properly during early development, exposing fragile nerves. This can result in lifelong paralysis, difficulties walking, and a loss of bladder and bowel function. 

Myelomeningocele develops when a portion of the spinal cord pushes through a hole in the baby's back. For many years, surgeons have operated during pregnancy to seal this hole. This foetal surgery reduces some challenges, but it does not completely prevent nerve damage that has already occurred. 

The new approach includes a critical step. During foetal surgery, surgeons directly applied unique healing cells derived from donated placentas to the exposed spinal cord. Stem cells are the body's basic building elements that can help mend damaged tissue. Placenta-derived mesenchymal stem cells have been shown to reduce inflammation, protect nerve cells, and promote recovery. 

"This is the first time live stem cells have been applied directly to a foetus' damaged spine," the research team stated, citing the trial as a significant step forward in in-utero therapy. 

Six expectant women whose kids were diagnosed with spina bifida had the combined surgery. Six infants were born between July 2021 and December 2022. In all cases, the spinal repair was intact at birth. Doctors observed no infections, aberrant tissue growth, or tumour formation associated with the stem cell treatment. 

The most remarkable finding came from MRI images performed after birth. An MRI is a detailed imaging test that employs magnets to create clear images of the body's internal systems. These scans indicated that hindbrain herniation, a dangerous disease in which a portion of the brain is dragged downward due to spinal fluid imbalance, had been reversed in all six newborns. This brain defect is usually found in severe spina bifida and frequently leads to additional difficulties. 

Importantly, the study and follow-up period thus far have not detected any major side effects from stem cell therapy. The children will continue to have monthly health screenings until they are six years old. The researchers will continuously evaluate mobility, nerve function, and overall development to assure long-term safety and benefit. 

Experts point out that this procedure was an early-stage safety experiment with a small number of patients. Larger clinical trials are planned to determine whether the therapy consistently improves movement and quality of life when compared to standard surgery alone. Regulatory agencies collaborate with investigators to monitor results and guarantee rigorous safety standards. 

Researchers say their goal is clear: to make stem cell-enhanced foetal surgery a safe and common option for newborns with severe spina bifida. If verified in further research, this strategy could change how doctors treat some birth disorders – not after delivery, but while the infant is still in the womb. 

For families facing a spina bifida diagnosis, the findings provide cautious but genuine optimism that early intervention can transform a child's life before they take their first breath.