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| Junctional neural tube defect caused by Prickle1 disruption as seen using advanced imaging. Photo Credit: Dr Jian Xiong Wang |
Scientific Frontline: Extended "At a Glance" Summary: PRICKLE1 Protein Disruption and Junctional Neural Tube Defects
The Core Concept: Researchers at the University of Queensland have discovered that the disruption of a specific cellular protein, known as PRICKLE1, directly impairs the formation of the neural tube during embryonic development. This disruption prevents the upper and lower sections of the spinal cord from fusing correctly, resulting in junctional neural tube defects.
Key Distinction/Mechanism: While common neural tube defects like spina bifida are well documented, junctional neural tube defects specifically involve the failure of the spinal cord's upper and lower sections to join. Utilizing advanced imaging to monitor quail embryos—which share developmental similarities with humans—researchers observed the exact mechanism in real time. They established that PRICKLE1, a protein vital for normal tissue development, acts as a primary catalyst for this failure when its function is disrupted.
Major Frameworks/Components:
- Neural Tube Formation: The embryonic biological process occurring around the fourth week of gestation in humans, forming the foundational structure for the brain, spinal cord, and nervous system.
- PRICKLE1 Protein: A naturally occurring cellular protein essential for regulating proper tissue development and cellular alignment during embryogenesis.
- Real-Time Advanced Imaging: High-resolution microscopy techniques utilized to track in vivo cellular behavior and morphogenetic movements in quail embryo models.
Branch of Science: Embryology, Developmental Biology, Teratology, and Molecular Biology.
Future Application: The findings provide a foundational understanding necessary to develop targeted preventative interventions, potentially mirroring how folic acid supplementation is currently used to prevent spina bifida. Additionally, it opens avenues for advanced prenatal screening tools and new therapeutic strategies to mitigate developmental anomalies before irreversible damage occurs.
Why It Matters: Neural tube anomalies are the second most common birth defect globally, affecting approximately one in every 1,000 pregnancies. Because the resulting neurological damage cannot be reversed once formed—often leading to fatality or lifelong disability requiring complex surgeries—understanding the precise molecular disruptions that cause these defects is critical for developing viable prevention methods.
Advanced imaging from UQ's Institute of Molecular Bioscience shows the forming of a neural tube in a quail embryo.
Video Credit: Jian Xiong Wang
University of Queensland researchers have revealed how a problematic cell protein causes a birth defect in an embryo, unlocking the potential for future prevention and treatments.
Using advanced imaging to monitor quail embryos – which develop similarly to humans – researchers analyzed how a specific part of the neural tube formed, which is essential in the development of the spinal cord, nervous system and other important tissues.
Dr Mel White from the Institute for Molecular Bioscience said they watched in “real time” how a disruption from a protein – known as PRICKLE1 – during neural tube formation led to birth defects – a process that has never been observed this way before.
“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 White said.
“Once formed, the damage cannot be undone, and those babies who do survive often require surgery and can have lifelong disabilities.
“Neural tube defects are the second most common form of birth defects, after the heart, and can affect about one in every 1000 pregnancies worldwide, but we don’t really have any effective treatments.”
One of the most common neural tube birth defects is spina bifida, which can be prevented in some cases with folic acid supplements during pregnancy.
This study examined junctional neural tube defects which were only discovered 9 years ago and occur when the upper and lower sections of the spinal cord fail to join correctly.
Dr. White hopes the findings will lead to preventions similar to those for spina bifida.
“Our study provides new avenues for future treatments because we haven’t known exactly how this disruption in neural tube formation occurs, until now,” Dr White said.
Lead author Dr Jian Xiong Wang said quail embryos were studied because their neural tube junctional region formed similarly to humans.
“We used advanced imaging techniques to watch the quail embryos form in real time, and how PRICKLE1 impacted this process,” Dr Wang said.
“PRICKLE1 is a protein that everyone has in their bodies and is vital for tissue development.
“When the neural tube junction formed, we found that if PRICKLE1 was disrupted it would impact that formation process, causing a birth defect.
“We hope these findings will help scientists better understand how these birth defects arise and unlock the potential for future prevention, screening and treatment.”
Published in journal: Nature Communications
Authors: Jian Xiong Wang, Yanina D. Alvarez, Siew Zhuan Tan, Samara N. Ranie, Samantha J. Stehbens, and Melanie D. White
Source/Credit: University of Queensland
Reference Number: bio042926_01
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