ER stress and slit diaphragms: is there a connection?
Tobias Hermle1, Matias Simons2
1Renal Division, Department of Medicine, Faculty of Medicine and Medical Center, University of Freiburg, Freiburg, Germany.
Kidney International
|April 21, 2023
Summary
Galloway-Mowat syndrome, a kidney disorder, is linked to defective protein translation. This study reveals endoplasmic reticulum stress contributes to kidney podocyte damage in this condition.
Area of Science:
- Nephrology
- Molecular Biology
- Genetics
Background:
- Galloway-Mowat syndrome is a neurorenal disorder.
- It is associated with variants in the KEOPS complex, affecting protein translation.
- The precise kidney pathogenesis remains unclear, particularly podocyte involvement.
Purpose of the Study:
- To elucidate the underlying mechanisms of kidney podocyte dysfunction in Galloway-Mowat syndrome.
- To investigate the role of endoplasmic reticulum stress in the syndrome's pathogenesis.
- To establish a link between KEOPS variants and slit diaphragm defects.
Main Methods:
- Utilized Drosophila nephrocytes as a model system.
- Investigated the impact of KEOPS variants on cellular stress pathways.
- Examined the integrity of the slit diaphragm in affected nephrocytes.
Main Results:
- Demonstrated a connection between defective KEOPS function and endoplasmic reticulum stress in nephrocytes.
- Showed that endoplasmic reticulum stress leads to defects in the slit diaphragm.
- Identified a potential pathway contributing to podocyte injury in Galloway-Mowat syndrome.
Conclusions:
- Endoplasmic reticulum stress is implicated in the pathogenesis of Galloway-Mowat syndrome.
- Defects in the slit diaphragm are a consequence of ER stress in this context.
- Drosophila nephrocytes serve as a valuable model for studying this complex disorder.
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