PUBLICATION
Deletion of ADP Ribosylation Factor-Like GTPase 13B Leads to Kidney Cysts
- Authors
- Li, Y., Tian, X., Ma, M., Jerman, S., Kong, S., Somlo, S., Sun, Z.
- ID
- ZDB-PUB-160508-6
- Date
- 2016
- Source
- Journal of the American Society of Nephrology : JASN 27(12): 3628-3638 (Journal)
- Registered Authors
- Ma, Ming, Sun, Zhaoxia
- Keywords
- polycystic kidney disease, renal fibrosis, signaling
- MeSH Terms
-
- ADP-Ribosylation Factors/genetics*
- Abnormalities, Multiple/genetics*
- Animals
- Cerebellum/abnormalities*
- Eye Abnormalities/genetics*
- Gene Deletion*
- Humans
- Kidney Diseases, Cystic/genetics*
- Mice
- Mutation*
- Retina/abnormalities*
- Zebrafish
- PubMed
- 27153923 Full text @ J. Am. Soc. Nephrol.
Citation
Li, Y., Tian, X., Ma, M., Jerman, S., Kong, S., Somlo, S., Sun, Z. (2016) Deletion of ADP Ribosylation Factor-Like GTPase 13B Leads to Kidney Cysts. Journal of the American Society of Nephrology : JASN. 27(12):3628-3638.
Abstract
The gene for ADP ribosylation factor-like GTPase 13B (Arl13b) encodes a small GTPase essential for cilia biogenesis in multiple model organisms. Inactivation of arl13b in zebrafish leads to a number of phenotypes indicative of defective cilia, including cystic kidneys. In mouse, null mutation in Arl13b results in severe patterning defects in the neural tube and defective Hedgehog signaling. Human mutations of ARL13B lead to Joubert syndrome, a ciliopathy. However, patients with mutated ARL13B do not develop kidney cysts. To investigate whether Arl13b has a role in ciliogenesis in mammalian kidney and whether loss of function of Arl13b leads to cystic kidneys in mammals, we generated a mouse model with kidney-specific conditional knockout of Arl13b Deletion of Arl13b in the distal nephron at the perinatal stage led to a cilia biogenesis defect and rapid kidney cyst formation. Additionally, we detected misregulation of multiple pathways in the cystic kidneys of this model. Moreover, valproic acid, a histone deacetylase inhibitor that we previously showed slows cyst progression in a mouse cystic kidney model with neonatal inactivation of Pkd1, inhibited the early rise of Wnt7a expression, ameliorated fibrosis, slowed cyst progression, and improved kidney function in the Arl13b mutant mouse. Finally, in rescue experiments in zebrafish, all ARL13B allele combinations identified in patients with Joubert syndrome provided residual Arl13b function, supporting the idea that the lack of cystic kidney phenotype in human patients with ARL13B mutations is explained by the hypomorphic nature of the mutations.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping