Related Experiment Video
Updated: Jan 29, 2026

Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport
Published on: November 27, 2016
Bile Acid Synthesis Defect and Hyperinsulinism
Michael Rogers1, Francisco Sylvester1, Steven Lichtman1
1Department of Pediatric Gastroenterology, University of North Carolina Children's Hospital, Chapel Hill, NC.
Insights
Rare bile acid synthesis defects can cause liver failure in infants. This case highlights a potential link between this liver dysfunction and prolonged neonatal hyperinsulism (PNH), suggesting PNH may arise from cholestatic stress.
Area of Science:
- Biochemistry
- Pediatric Gastroenterology
- Neonatology
Background:
- Congenital defects in bile acid synthesis (BASD) are rare genetic disorders.
- These defects lead to progressive liver dysfunction and failure.
- Prolonged neonatal hyperinsulism (PNH) is a distinct condition characterized by persistent hypoglycemia due to stress.
Observation:
- A 4-month-old infant presented with severe liver failure attributed to a bile acid synthesis defect.
- The infant also developed prolonged neonatal hyperinsulism (PNH).
- Liver failure symptoms resolved with oral cholic acid treatment.
Findings:
- Treatment with oral cholic acid successfully resolved the infant's liver failure.
- The prolonged neonatal hyperinsulism (PNH) observed in the infant resolved gradually over time.
- This case suggests a potential association between cholestatic liver failure and the development of PNH.
Implications:
- The findings suggest that cholestatic liver failure may act as a specific stressor contributing to the development of PNH.
- Understanding this relationship could help identify infants at higher risk for PNH.
- Further research into the interplay between liver dysfunction and metabolic stress in neonates is warranted.
Abstract:
Congenital defects of bile acid synthesis are rare disorders that cause progressive liver dysfunction. Prolonged neonatal hyperinsulism (PNH) is a separate entity that leads to persistent hypoglycemia secondary to stress. We present a 4-month-old infant who presented with liver failure secondary to a bile acid synthesis defect. The patient's liver failure resolved with oral cholic acid therapy. This patient also developed PNH, which slowly resolved over time. This case illustrates a possible relationship between cholestatic liver failure and PNH. This relationship may help define specific stressors that increase the likelihood of developing PNH.
Related Concept Videos
Bile
Bile is released when dietary fats enter...
Synthesis and Decomposition Reactions
Lumber Defects
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...
Amino acids
Transfer RNA Synthesis
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
Dehydration Synthesis
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
Synthesis of carbohydrates
Sugar molecules are covalently linked together by dehydration synthesis. During the reaction, the hydroxyl (-OH) group from...

