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A rare subtype of Joubert syndrome and related disorders (JSRD) characterized by the neurological features of JS associated with renal disease, in the absence of retinopathy.
Features include always present findings: Delayed gross motor development; and very common findings: Cerebellar vermis hypoplasia, Low muscle tone (hypotonia), Global developmental delay, and Ataxia and others. 45 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 8 | Global developmental delay, Ataxia, Delayed gross motor development |
NPHP1 encodes nephrocystin 1 (732 aa). Together with BCAR1 it may play a role in the control of epithelial cell polarity. Involved in the organization of apical junctions in kidney cells together with NPHP4 and RPGRIP1L/NPHP8. Highest expression in Testis (27.2 TPM) and Pituitary (15.0 TPM).
Joubert syndrome with renal defect is associated with mutations in the NPHP1 gene on chromosome 2.
NPHP1 is classified as a druggable target with score 0.0.
Genetic testing for NPHP1 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 1 always present feature, 10 very common features, 10 common features.
Estimated prevalence: Unknown (Unknown prevalence).
No clinical trials have been registered for Joubert syndrome with renal defect.
19 publications have been identified in PubMed for Joubert syndrome with renal defect. Research spans Case Report / Case Series (53%), Review / Meta-Analysis (26%), and Basic Science / Preclinical (11%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 10 | 53% |
Data assembled from 6 of 12 sources · Last updated Sep 19, 2026, 9:40 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about Joubert syndrome with renal defect
Kidneys and urinary system |
5 |
Stage 5 chronic kidney disease, Reduced kidney function (renal insufficiency), Nephronophthisis |
Eyes | 5 | Hypometric saccades, Nystagmus, Oculomotor apraxia |
Muscles | 3 | Low muscle tone (hypotonia), Generalized hypotonia, Delayed gross motor development |
Head and neck | 3 | Long face, Cleft palate, Orofacial cleft |
Bones and joints | 2 | Postural instability, Sideways curvature of the spine (scoliosis) |
Lungs and breathing | 1 | Apnea |
Digestive system | 1 | Feeding difficulties |
Hormones | 1 | Abnormality of the hypothalamus-pituitary axis |
Arms and legs | 1 | Hand polydactyly |
Research summaries
5 |
26% |
Laboratory research | 2 | 11% |
Disease patterns and progression | 2 | 11% |
Jones N (2025). [PMID: 41064626](https://pubmed.ncbi.nlm.nih.gov/41064626/). *Case reports in nephrology and dialysis*. [Case Report / Case Series]
Yang Q (2025). [PMID: 41317100](https://pubmed.ncbi.nlm.nih.gov/41317100/). *Molecular genetics & genomic medicine*. [Basic Science / Preclinical]
Devlin LA (2025). [PMID: 40254346](https://pubmed.ncbi.nlm.nih.gov/40254346/). *Current topics in developmental biology*. [Review / Meta-Analysis]
Tsang SH (2025). [PMID: 40736828](https://pubmed.ncbi.nlm.nih.gov/40736828/). *Advances in experimental medicine and biology*. [Epidemiology / Natural History]
Hakeem A (2025). [PMID: 39781470](https://pubmed.ncbi.nlm.nih.gov/39781470/). *International journal of biological sciences*. [Review / Meta-Analysis]
Salari M (2025). [PMID: 40526232](https://pubmed.ncbi.nlm.nih.gov/40526232/). *Cerebellum (London, England)*. [Review / Meta-Analysis]
Uuganbayar U (2025). [PMID: 40570958](https://pubmed.ncbi.nlm.nih.gov/40570958/). *The Journal of biological chemistry*. [Review / Meta-Analysis]
Demirtas İ (2025). [PMID: 41316455](https://pubmed.ncbi.nlm.nih.gov/41316455/). *Journal of medical case reports*. [Case Report / Case Series]
Ercoskun P (2025). [PMID: 39731278](https://pubmed.ncbi.nlm.nih.gov/39731278/). *Clinical genetics*. [Basic Science / Preclinical]
Tedesco MG (2025). [PMID: 40428346](https://pubmed.ncbi.nlm.nih.gov/40428346/). *Genes*. [Case Report / Case Series]