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Updated: Jun 25, 2026
06:39
Differentiation, Maintenance, and Analysis of Human Retinal Pigment Epithelium Cells: A Disease-in-a-dish Model for BEST1 Mutations
Published on: August 24, 2018
The ITM2B-associated retinal dystrophy mutation modifies BRI23 peptide interactions in the human retina
Tasnim Ben Yacoub1, Andréa Amprou2, Camille Letellier2
1Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France. tasnim.inserm@gmail.com.
Scientific Reports
|June 23, 2026
Summary
The BRI23 peptide interacts with proteins crucial for retinal function. A variant linked to ITM2B-related retinal dystrophy alters these interactions, potentially disrupting mitochondrial and synaptic pathways.
Area of Science:
- Neurobiology
- Ophthalmology
- Molecular Biology
Background:
- The BRI23 peptide, derived from integral transmembrane protein 2B (ITM2B), is implicated in neurodegenerative diseases.
- Its specific function and interactions within the human retina are not well-understood.
- ITM2B-related retinal dystrophy (IRRD) is a condition associated with mutations in ITM2B.
Purpose of the Study:
- To comprehensively analyze the BRI23 interactome in the human retina.
- To investigate how the BRI23-RD variant, associated with IRRD, affects protein interactions.
- To identify cellular pathways potentially disrupted by the IRRD variant.
Main Methods:
- Peptide-bead coupling system was employed to identify BRI23 interacting proteins.
- Proteomic analysis was performed to characterize the BRI23 interactome.
- Comparative analysis was conducted between wild-type BRI23 and the BRI23-RD variant.
Main Results:
- Identification of 2302 BRI23 interacting proteins in the human retina.
- Key interacting proteins are involved in mitochondrial processes, synaptic transmission, and photoreceptor function.
- The BRI23-RD variant demonstrated significantly altered protein interactions compared to wild-type BRI23.
- An increased abundance of mitochondrial and synaptic proteins was observed with the BRI23-RD variant.
Conclusions:
- The BRI23 interactome is crucial for normal retinal function, particularly in mitochondrial and synaptic pathways.
- The BRI23-RD variant disrupts these normal interactions, suggesting a molecular basis for IRRD.
- These findings highlight potential therapeutic targets for ITM2B-related retinal diseases.
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