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Updated: Mar 14, 2026
A Neonatal Imaging Model of Gram-Negative Bacterial Sepsis
Published on: August 12, 2020
Neonatal mucosal immunology
N Torow1, B J Marsland2, M W Hornef1
1Institute of Medical Microbiology, RWTH University Hospital Aachen, Aachen, Germany.
Insights
Newborns
Area of Science:
- Immunology
- Microbiology
- Neonatal Development
Background:
- Neonatal mucosal barriers face significant environmental, nutritional, and microbial exposures post-birth.
- The developing immune system and the establishment of the microbiome occur concurrently in neonates.
Purpose of the Study:
- To review the critical role of microbes in immune maturation within the gut and lung.
- To highlight how early microbial interactions shape long-term immune characteristics and disease trajectories.
Main Methods:
- This review synthesizes current research on neonatal immune development and microbiome establishment.
- Focuses on the interplay between microbial exposures and immune system maturation in the gastrointestinal and respiratory tracts.
Main Results:
- Early microbial exposures are key determinants of immune tone at mucosal barriers.
- The timing and nature of host-microbe interactions influence immune system development and health outcomes.
Conclusions:
- Microbes play a central role in the maturation of the neonatal gut and lung immune systems.
- Understanding these interactions offers potential targets for future therapeutic interventions to promote immune health.
Abstract:
Although largely deprived from exogenous stimuli in utero, the mucosal barriers of the neonate after birth are bombarded by environmental, nutritional, and microbial exposures. The microbiome is established concurrently with the developing immune system. The nature and timing of discrete interactions between these two factors underpins the long-term immune characteristics of these organs, and can set an individual on a trajectory towards or away from disease. Microbial exposures in the gastrointestinal and respiratory tracts are some of the key determinants of the overall immune tone at these mucosal barriers and represent a leading target for future intervention strategies. In this review, we discuss immune maturation in the gut and lung and how microbes have a central role in this process.
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