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Features include always present findings: Difficulty swallowing (dysphagia), Feeding difficulties, Shrinkage of the cerebellum (cerebellar atrophy), and Leukoencephalopathy and others; and very common findings: Global brain atrophy. 20 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 7 | Difficulty swallowing (dysphagia), Loss of previously acquired skills (developmental regression), Seizure |
SNF8 function has not been fully characterized.
Developmental and epileptic encephalopathy 115 is associated with mutations in the SNF8 gene on chromosome 17.
Genetic testing for SNF8 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for developmental and epileptic encephalopathy 115 has been reported in the published literature.
Phenotype severity distribution: 7 always present features, 1 very common feature, 6 common features.
No clinical trials have been registered for developmental and epileptic encephalopathy 115.
13 publications have been identified in PubMed for developmental and epileptic encephalopathy 115. Research spans Epidemiology / Natural History (46%), Basic Science / Preclinical (23%), and Case Report / Case Series (15%).
Research Type | Count | % of Total |
|---|---|---|
Disease patterns and progression | 6 | 46% |
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 9:41 AM UTC
Online Mendelian Inheritance in Man
Muscles | 4 | Shrinkage of the cerebellum (cerebellar atrophy), Global brain atrophy, Low muscle tone (hypotonia) |
Digestive system | 2 | Difficulty swallowing (dysphagia), Feeding difficulties |
Eyes | 2 | Optic nerve hypoplasia, Nystagmus |
Laboratory research |
3 |
23% |
Patient case studies | 2 | 15% |
Testing and diagnosis research | 1 | 8% |
New treatment approaches | 1 | 8% |
Quiroz V (2026). [PMID: 40811633](https://pubmed.ncbi.nlm.nih.gov/40811633/). *Brain*. [Basic Science / Preclinical]
Cicala G (2026). [PMID: 41610868](https://pubmed.ncbi.nlm.nih.gov/41610868/). *Neuropediatrics*. [Diagnostic / Biomarker]
Zhao HQ (2026). [PMID: 42227679](https://pubmed.ncbi.nlm.nih.gov/42227679/). *Epilepsia*. [Epidemiology / Natural History]
Sarigecili E (2026). [PMID: 42013565](https://pubmed.ncbi.nlm.nih.gov/42013565/). *Pediatr Neurol*. [Basic Science / Preclinical]
Hamidun Majid NA (2026). [PMID: 41875528](https://pubmed.ncbi.nlm.nih.gov/41875528/). *Brain Dev*. [Epidemiology / Natural History]
Lersch R (2025). [PMID: 40022587](https://pubmed.ncbi.nlm.nih.gov/40022587/). *Epilepsia*. [Epidemiology / Natural History]
Alexander B (2025). [PMID: 41056867](https://pubmed.ncbi.nlm.nih.gov/41056867/). *J Clin Neurosci*. [Case Report / Case Series]
Lei W (2025). [PMID: 38927006](https://pubmed.ncbi.nlm.nih.gov/38927006/). *Dev Med Child Neurol*. [Basic Science / Preclinical]
Machado RA (2025). [PMID: 40132353](https://pubmed.ncbi.nlm.nih.gov/40132353/). *Seizure*. [Epidemiology / Natural History]
Karimzadeh P (2025). [PMID: 40494057](https://pubmed.ncbi.nlm.nih.gov/40494057/). *Pediatr Neurol*. [Epidemiology / Natural History]