PUBLICATION
A zebrafish model of congenital nephrotic syndrome of the Finnish type
- Authors
- Lee, M.S., Devi, S., He, J.C., Zhou, W.
- ID
- ZDB-PUB-221004-9
- Date
- 2022
- Source
- Frontiers in cell and developmental biology 10: 976043 (Journal)
- Registered Authors
- Zhou, Weibin
- Keywords
- CRISPR/Cas9, NPHS1, hypoalbuminemia, nephrin, nephrotic syndrome, zebrafish
- MeSH Terms
- none
- PubMed
- 36187478 Full text @ Front Cell Dev Biol
Citation
Lee, M.S., Devi, S., He, J.C., Zhou, W. (2022) A zebrafish model of congenital nephrotic syndrome of the Finnish type. Frontiers in cell and developmental biology. 10:976043.
Abstract
Nephrotic syndrome (NS) is a disease characterized by proteinuria and subsequent hypoalbuminemia, hyperlipidemia and edema due to the defective renal glomerular filtration barrier (GFB). Mutations of NPHS1, encoding NEPHRIN, a podocyte protein essential for normal GFB, cause congenital nephrotic syndrome (CNS) of the Finnish type (CNF), which accounts for about 50% of CNS cases. We generated zebrafish nphs1 mutants by using CRISPR/Cas9. These mutants completely lack nephrin proteins in podocytes and develop progressive peri-orbital and whole-body edema after 5 days post fertilization. Ultra-structurally, loss of nephrin results in absence of slit-diaphragms and progressive foot process effacement in zebrafish pronephric glomeruli, similar to the pathological changes in human CNF patients. Interestingly, some nphs1 mutants are viable to adulthood despite ultra-structural defects in renal glomeruli. Using a reporter line Tg (l-fabp:VDBP-GFP) expressing GFP-tagged vitamin-D-binding protein in the blood plasma, we observed a reduction of intravascular GFP fluorescence in the nphs1 mutants, a hypoalbuminemia-like phenotype. In addition, we detected excretion of GFP by the nphs1 mutants, reminiscent of proteinuria. Therefore, we have demonstrated that the nphs1 mutant zebrafish recapitulate the human NS phenotypes and provide a novel and relevant animal model useful for screening therapeutical agents for this disease.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping