Breakthrough Study Reveals Key Protein Behind Neural Tube Defects

University of Queensland researchers have used advanced imaging to watch quail embryos develop in real time, uncovering how a specific protein drives a devastating class of birth defects.

The study, published in Nature Communications, focused on junctional neural tube defects (JNTDs) —a type of malformation identified just nine years ago. In these cases, the upper and lower sections of the spinal cord fail to connect properly.

"The neural tube is formed at about 4 weeks of gestation in human embryos, but when something goes wrong in the cells, it can cause birth defects, many of which are fatal."
— Dr. Mel White, Institute for Molecular Bioscience

The PRICKLE1 Protein: A Critical Culprit

The team discovered that disruption of the PRICKLE1 protein impairs the formation of the neural tube junction, leading directly to birth defects.

Dr. Jian Xiong Wang, lead author of the study, explained why quail embryos were chosen for the research:

"PRICKLE1 is a protein that everyone has in their bodies and is vital for tissue development."

The researchers selected quail embryos because their neural tube junctional region forms in a manner strikingly similar to that of humans.

Why This Matters

Neural tube defects affect approximately one in 1,000 pregnancies worldwide, making them the second most common form of birth defect after heart defects.

The timeline is unforgiving: The neural tube forms around four weeks of gestation in humans. Once damage occurs, it cannot be reversed. Survivors may require surgery and often experience lifelong disabilities.

Spina bifida, the most common neural tube defect, can be partially prevented with folic acid supplements—but the mechanism behind JNTDs has remained a mystery until now.

A Path Forward

Dr. White emphasized that these findings open new avenues for future treatments, as the mechanism of disruption was previously unknown.

"The neural tube is formed at about 4 weeks of gestation in human embryos, but when something goes wrong in the cells, it can cause birth defects, many of which are fatal."
— Dr. Mel White

By identifying the role of PRICKLE1, researchers now have a specific target to investigate for potential interventions in preventing these severe birth defects.