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Features include always present findings: Decreased serum leptin; and very common findings: Sideways curvature of the spine (scoliosis). 34 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 6 | Seizure, Severe intellectual disability, Overactive reflexes (hyperreflexia) |
KCNJ6 encodes potassium inwardly rectifying channel subfamily J member 6 (423 aa). Inward rectifier potassium channels are characterized by a greater tendency to allow potassium to flow into the cell rather than out of it. Highest expression in Brain Cerebellar Hemisphere (8.3 TPM) and Brain Cerebellum (7.5 TPM).
Keppen-Lubinsky syndrome is associated with mutations in the KCNJ6 gene on chromosome 21.
KCNJ6 is classified as a druggable target (Druggable Genome, Ion Channel, and Transporter categories) with score 3.9.
Genetic testing for KCNJ6 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for Keppen-Lubinsky syndrome has been reported in the published literature.
Phenotype severity distribution: 1 always present feature, 1 very common feature, 24 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for Keppen-Lubinsky syndrome.
99 publications have been identified in PubMed for Keppen-Lubinsky syndrome. Research spans Basic Science / Preclinical (41%), Case Report / Case Series (19%), and Review / Meta-Analysis (18%).
Research Type | Count | % of Total |
|---|---|---|
Laboratory research | 41 | 41% |
Data assembled from 6 of 12 sources · Last updated Sep 19, 2026, 4:30 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about Keppen-Lubinsky syndrome
Head and neck
5 |
Tented upper lip vermilion, High palate, Progeroid facial appearance |
Lungs and breathing | 3 | Upper airway obstruction, Recurrent pneumonia, Difficulty breathing (respiratory insufficiency) |
Skin | 2 | Absence of subcutaneous fat, Lack of facial subcutaneous fat |
Bones and joints | 2 | Severe backward arching of the body (opisthotonus), Sideways curvature of the spine (scoliosis) |
Muscles | 1 | Flexion contracture |
Growth and development | 1 | Failure to thrive |
19 |
19% |
Research summaries | 18 | 18% |
Disease patterns and progression | 10 | 10% |
Testing and diagnosis research | 6 | 6% |
New treatment approaches | 4 | 4% |
Clinical study results | 1 | 1% |
Winden K (2026). [PMID: 41820375](https://pubmed.ncbi.nlm.nih.gov/41820375/). *Nature reviews. Disease primers*. [Basic Science / Preclinical]
Fakih H (2025). [PMID: 41523402](https://pubmed.ncbi.nlm.nih.gov/41523402/). *Cureus*. [Case Report / Case Series]
Asadollahi R (2025). [PMID: 41125872](https://pubmed.ncbi.nlm.nih.gov/41125872/). *Nature genetics*. [Basic Science / Preclinical]
Cho M (2025). [PMID: 39991798](https://pubmed.ncbi.nlm.nih.gov/39991798/). *Alzheimer's & dementia : the journal of the Alzheimer's Association*. [Basic Science / Preclinical]
Pérez Baca MDR (2025). [PMID: 40367947](https://pubmed.ncbi.nlm.nih.gov/40367947/). *American journal of human genetics*. [Basic Science / Preclinical]
Metzler S (2025). [PMID: 39846602](https://pubmed.ncbi.nlm.nih.gov/39846602/). *JAAPA : official journal of the American Academy of Physician Assistants*. [Review / Meta-Analysis]
De la Rosa SO (2025). [PMID: 40116760](https://pubmed.ncbi.nlm.nih.gov/40116760/). *Epilepsia*. [Case Report / Case Series]
Chakraborty S (2025). [PMID: 40131620](https://pubmed.ncbi.nlm.nih.gov/40131620/). *Indian journal of pediatrics*. [Basic Science / Preclinical]
Rasmussen NB (2025). [PMID: 40441421](https://pubmed.ncbi.nlm.nih.gov/40441421/). *European journal of medical genetics*. [Review / Meta-Analysis]
Yin C (2025). [PMID: 41274232](https://pubmed.ncbi.nlm.nih.gov/41274232/). *Research in developmental disabilities*. [Epidemiology / Natural History]