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Updated: May 21, 2025

Fluorescence-Based Measurements of Phosphatidylserine/Phosphatidylinositol 4-Phosphate Exchange Between Membranes
Published on: March 14, 2021
Glycerophospholipids: Roles in Cell Trafficking and Associated Inborn Errors
Foudil Lamari1,2, Francis Rossignol3,4, Grant A Mitchell4
1Metabolic Biochemistry, Neurometabolic and Neurodegenerative Unit - DMU BioGeMH Hôpital Pitié-Salpêtrière, AP-HP. Sorbonne Université, Paris, France.
Glycerophospholipids (GPLs) are vital membrane lipids involved in many cell functions. Inborn errors of GPL metabolism cause diverse, often severe, neurologic and retinal diseases, highlighting the need for advanced diagnostics like lipidomics.
Area of Science:
- Biochemistry
- Cell Biology
- Genetics
Background:
- Glycerophospholipids (GPLs) are fundamental structural and functional components of cellular membranes.
- Their synthesis and remodeling involve multiple cellular compartments, including mitochondria-associated membranes (MAMs).
- Diverse fatty acid compositions influence membrane properties and cellular processes.
Purpose of the Study:
- To explore the complexity of GPL biosynthesis and remodeling pathways.
- To characterize the clinical diversity and genetic basis of inborn errors of GPL metabolism.
- To evaluate the potential of lipidomics in diagnosing and monitoring GPL-related disorders.
Main Methods:
- Review of known pathways in GPL synthesis and remodeling.
- Analysis of clinical data from 38 identified inborn errors of GPL metabolism.
- Assessment of diagnostic approaches, including broad molecular testing and lipidomics.
Main Results:
- GPLs play critical roles in membrane structure, trafficking, and signaling.
- Inborn errors of GPL metabolism exhibit significant clinical heterogeneity, with a high prevalence of neurologic (61%) and neuroretinal (37%) manifestations.
- Developmental delay/encephalopathy and spastic paraplegia are common neurologic features.
Conclusions:
- GPL metabolism is complex and essential for cellular function.
- Inborn errors of GPL metabolism represent a significant diagnostic challenge due to clinical diversity.
- Lipidomics offers a promising avenue for improved diagnosis, natural history tracking, and treatment monitoring of these disorders.
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