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Updated: Jul 12, 2025

Immunometabolic Circuits in Infection for Advancing Host Directed Therapies
Published on: September 13, 2024
The Reciprocal Interplay between Infections and Inherited Metabolic Disorders
Albina Tummolo1, Livio Melpignano2
1Department of Metabolic Diseases, Clinical Genetics and Diabetology, Giovanni XXIII Children Hospital, Azienda Ospedaliero-Universitaria Consorziale, 70126 Bari, Italy.
Abstract:
Infections represent the main cause of acute metabolic derangements and/or the worsening of the clinical course of many inherited metabolic disorders (IMDs). The basic molecular mechanisms behind the role of infections in these conditions have not been completely clarified. This review points out the different mechanisms behind the relationship between IMDs and infections, providing an overview of this still-under-investigated area. Classically, infections have been considered as the consequence of a compromised immune system due to a biochemical defect of energy production. An adjunctive pathogenetic mechanism is related to a genetically altered protein-attached glycans composition, due to congenital glycosilation defects. In addition, a dietary regimen with a reduced intake of both micro- and macronutrients can potentially compromise the ability of the immune system to deal with an infection. There is recent pre-clinical evidence showing that during infections there may be a disruption of substrates of various metabolic pathways, leading to further cellular metabolic alteration. Therefore, infective agents may affect cellular metabolic pathways, by mediation or not of an altered immune system. The data reviewed here strongly suggest that the role of infections in many types of IMDs deserves greater attention for a better management of these disorders and a more focused therapeutic approach.
Insights
Infections can worsen inherited metabolic disorders (IMDs) through various mechanisms, including immune compromise and metabolic pathway disruption. Understanding these links is crucial for better IMD management and targeted therapies.
Area of Science:
- Biochemistry
- Immunology
- Genetics
Background:
- Infections are a primary trigger for acute metabolic derangements and clinical deterioration in inherited metabolic disorders (IMDs).
- The precise molecular mechanisms linking infections and IMDs remain incompletely understood.
- This review synthesizes current knowledge on the multifaceted relationship between infections and IMDs.
Purpose of the Study:
- To elucidate the diverse mechanisms through which infections impact inherited metabolic disorders.
- To provide a comprehensive overview of this under-investigated area of medical research.
- To highlight the clinical significance of understanding infection-IMD interactions.
Main Methods:
- Literature review of existing studies on infections and inherited metabolic disorders.
- Analysis of pathogenetic mechanisms, including immune system function and metabolic pathways.
- Synthesis of pre-clinical evidence on infection-induced metabolic alterations.
Main Results:
- Infections can exacerbate IMDs via compromised immune function due to energy production defects.
- Congenital disorders of glycosylation, affecting protein-attached glycans, represent an additional pathogenetic link.
- Nutritional deficiencies can impair immune response to infections in IMD patients.
- Emerging evidence indicates infections disrupt metabolic pathways, causing further cellular alterations.
Conclusions:
- Infections play a significant role in the clinical course of many inherited metabolic disorders.
- A deeper understanding of infection-IMD interactions is essential for improved patient management.
- Targeted therapeutic strategies may be developed by focusing on these complex relationships.
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