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Characterizing renal involvement in Hermansky-Pudlak Syndrome in a zebrafish model
H Schenk1,2, J Müller-Deile3,4, P Schroder5
1Department of Medicine/Nephrology, Hannover Medical School, 30625, Hannover, Germany. Schenk.Heiko@mh-hannover.de.
Scientific Reports
|November 29, 2019
Summary
Hermansky-Pudlak Syndrome (HPS) involves kidney dysfunction due to HPS protein mutations. A new zebrafish model reveals HPS protein
Area of Science:
- Cell Biology
- Genetics
- Nephrology
Background:
- Hermansky-Pudlak Syndrome (HPS) is a rare genetic disorder.
- HPS is caused by mutations in HPS proteins, crucial for lysosomal-endosomal system organelle biogenesis.
- Human HPS manifests as albinism, platelet dysfunction, and pulmonary fibrosis, with renal involvement being understudied.
Purpose of the Study:
- To investigate the previously underestimated renal component of Hermansky-Pudlak Syndrome.
- To establish and validate a zebrafish model for studying HPS-related kidney disease.
Main Methods:
- Analysis of human podocyte cell cultures to assess renal expression of HPS genes (HPS1, 3, 4, 5).
- Development of a zebrafish model by knocking down HPS genes.
- Evaluation of glomerular injury, proteinuria, and structural changes in zebrafish.
Main Results:
- Human podocytes show high expression and active transcription of key HPS genes, indicating direct renal impact.
- Zebrafish with HPS gene knockdown exhibited glomerular injury, edema, and proteinuria.
- The zebrafish model displayed hypopigmentation and intracellular debris accumulation, mirroring HPS hallmarks.
Conclusions:
- HPS proteins play a significant, previously unrecognized role in kidney function.
- The developed zebrafish model effectively recapitulates key features of HPS renal disease.
- This research highlights potential therapeutic targets for managing renal complications in HPS.
