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Updated: Nov 26, 2025

Probiotic Studies in Neonatal Mice Using Gavage
Published on: January 27, 2019
The role of microbiota in neonatal hyperbilirubinemia
1Department of Neonatology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health Zhejiang, PR China.
Insights
Neonatal hyperbilirubinemia, common in newborns, involves elevated bilirubin. This review highlights gut microbiota
Area of Science:
- Neonatal medicine
- Microbiology
- Gastroenterology
Background:
- Neonatal hyperbilirubinemia affects 60% of full-term and 80% of preterm infants globally.
- Elevated bilirubin levels can lead to neurotoxic effects.
- Contributing factors include isoimmunization, gut flora, genetics, and environment.
Purpose of the Study:
- To identify critical gut microbiota signatures in neonatal hyperbilirubinemia.
- To elucidate the underlying pathogenetic mechanisms.
- To propose gut microbiota-based therapeutic strategies.
Main Methods:
- Review of animal and human studies on gut microbiota and bilirubin metabolism.
- Analysis of microbiota composition in neonates with varying hyperbilirubinemia severity.
- Focus on dysbiosis and microbiota-related metabolic alterations.
Main Results:
- Gut microbiota play a causal role in bilirubin metabolism.
- Specific microbiota compositions are associated with neonatal hyperbilirubinemia.
- Dysbiosis and altered metabolic processes are key factors.
Conclusions:
- Gut microbiota signatures are critical in neonatal hyperbilirubinemia.
- Understanding these signatures and mechanisms can guide new therapies.
- Targeting gut microbiota offers a novel therapeutic approach.
Abstract:
Hyperbilirubinemia accounts for about 60% of full-term and 80% of preterm neonates globally, which is characterized by physiologically elevated unconjugated bilirubin in serum, but abnormally high levels of bilirubin have potential neurotoxic effects. Several factors contribute to the development of neonatal hyperbilirubinemia, including isoimmunization, dysregulated gut flora, genetic alteration and environmental factors. Animal studies have pinpointed the causal roles of several bacteria in bilirubin metabolism. Human studies have revealed microbiota composition in hyperbilirubinemia and found that gut microbiota affect newborns with different severity of hyperbilirubinemia. However, dysbiosis and subsequent changes in microbiota-related metabolic processes are not always considered. This review aims to describe the critical microbiota signatures for neonatal hyperbilirubinemia and focus on the underlying pathogenetic mechanism. These scientific bases give a new and accurate therapeutic strategy for the application of gut microbiota.
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