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Updated: Jun 28, 2026
Modeling Paracrine Noncanonical Wnt Signaling In Vitro
Published on: December 10, 2021
Wnt signaling in caudal dysgenesis and diabetic embryopathy
Gabriela Pavlinkova1, J Michael Salbaum, Claudia Kappen
1Department of Pediatrics, University of Nebraska Medical Center, Omaha, Nebraska, USA.
Insights
Maternal diabetes during pregnancy significantly increases the risk of birth defects like caudal dysgenesis and heart defects. Altered Wnt signaling pathways are implicated in these developmental anomalies.
Area of Science:
- Developmental Biology
- Reproductive Medicine
- Genetics
Background:
- Congenital defects are a primary complication of diabetic pregnancies, leading to infant mortality.
- Caudal dysgenesis occurs 200-fold more frequently in infants of diabetic mothers.
- Diabetic pregnancies also elevate risks for heart defects and neural tube defects (NTDs).
Purpose of the Study:
- To investigate the molecular mechanisms behind aberrant embryonic development in diabetic pregnancies.
- To identify key genes and pathways involved in congenital anomalies.
Main Methods:
- Utilized a transgenic mouse model for caudal dysgenesis.
- Employed a pharmacological model to study gene expression.
- Applied in situ hybridization and quantitative real-time PCR techniques.
Main Results:
- Identified altered expression of multiple molecules crucial for embryonic development and growth.
- Observed significant changes in gene expression patterns related to developmental processes.
Conclusions:
- Altered Wnt signaling pathways play a significant role in the pathogenesis of developmental anomalies.
- Findings suggest Wnt signaling is a key factor in embryonic malformations linked to maternal diabetes.
Background:
Congenital defects are a major complication of diabetic pregnancy, and the leading cause of infant death in the first year of life. Caudal dysgenesis, occurring up to 200-fold more frequently in children born to diabetic mothers, is a hallmark of diabetic pregnancy. Given that there is also an at least threefold higher risk for heart defects and NTDs, it is important to identify the underlying molecular mechanisms for aberrant embryonic development.
Methods:
We have investigated gene expression in a transgenic mouse model of caudal dysgenesis, and in a pharmacological model using situ hybridization and quantitative real-time PCR.
Results:
We identified altered expression of several molecules that control developmental processes and embryonic growth.
Conclusions:
The results from our models point towards major implication of altered Wnt signaling in the pathogenesis of developmental anomalies associated with embryonic exposure to maternal diabetes.
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