DeCure's autonomous Rare AI scientist is researching a drug-repurposing hypothesis for pontocerebellar hypoplasia, type 1F — screening already-approved drugs against its 1-gene Open Targets disease module to publish open-access research. Research is fast; the path to publication is funded in milestone stages.
Disease modulePontocerebellar hypoplasia, type 1F maps to a 1-gene Open Targets module — the target space DeCure's AI scientist screens approved drugs against.
DeCure.ai methodSignature reversal (LINCS) plus network proximity (STRING) rank already-approved drugs likely to perturb this module — the same engine that produces DeCure.ai's repurposing hypotheses.
Repurposing thesisScreening approved medicines against this disease module, then publishing the evidence for the strongest candidate. Known pharmacology and human exposure data make the first question sharper — they do not establish safety or efficacy in a new indication.
Research record
01
ResearchComing soon
Candidate research + dossier — target rationale, drug-repurposing thesis and evidence pack.proof: Published dossier + on-chain hash
02
ValidationComing soon
In-vitro biological validation at a contract research org (CRO).proof: CRO contract + in-vitro report
03
Peer review & paperComing soon
Peer-reviewed paper published open-access (preprint + journal).proof: DOI + open-access link + on-chain hash
Current lead
No approved-drug candidate for pontocerebellar hypoplasia, type 1f is corroborated in the literature DeepSearch retrieved. Some conditions are managed with non-pharmacological care — a device, surgery or physical therapy — rather than a medicine; that may be the case here, or the literature we found may simply be too sparse yet to support a drug-repurposing angle.
Molecular view
exosome component 1 (EXOSC1) — EXOSC1 is one of the genes genetically linked to this disease in Open Targets — shown as context, not as a drug target we're pursuing: no approved-drug candidate for this disease is yet corroborated in the literature we found.
Loading structure…
helix sheet anpdrag to rotate · scroll to zoom
RCSB Protein Data Bank · entry 6D6Q · 3.45 Å · ligand PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER (ANP). Experimental structure, not a prediction.
What the evidence adds up to
In a cohort of 169 patients from 141 families with pontocerebellar hypoplasia, 106 tested positive for mutations in TSEN54, TSEN2, TSEN34 or RARS2. TSEN54 mutations correlated strongly with a dragonfly-like cerebellar pattern on MRI, where the cerebellar hemispheres are flat and severely reduced while the vermis is relatively spared. Clinically, TSEN54 mutations were associated with dyskinesia, dystonia and variable spasticity; nonsense or splice site mutations gave a more severe phenotype with perinatal symptoms, ventilator dependency and early death. RARS2 mutations were linked to pontocerebellar hypoplasia type 6 and could also cause type 1 with elevated cerebrospinal fluid lactate.
Pontocerebellar hypoplasia type 1 is defined by hypoplasia of the pons and cerebellum plus degeneration of spinal cord anterior horn motor neurons. A 4-year-old girl with severe psychomotor retardation, microcephaly, generalised hypotonia, muscle hypotrophy, limb contractions, absent stretch reflexes and neonatal epilepsy showed pontocerebellar hypoplasia on MRI. Electroneuromyography indicated axonal neuropathy, and deltoid muscle biopsy showed neurogenic muscular atrophy. Mitochondrial respiratory chain complex IV values were at the lower limit of normal in muscle and fibroblasts. Genetic testing for spinal muscular atrophy was negative.
A separate report described a 2-year-old girl with a relatively milder clinical phenotype: cerebellar atrophy without pontine involvement. This case suggests that pontocerebellar hypoplasia type 1 may have wider clinical and radiological variability than the classic severe phenotype, and that genetic heterogeneity likely exists.
What remains missing is a clear molecular mechanism linking the known gene mutations to anterior horn cell degeneration, and any specific treatment strategy. No drug has been tested in these patients. The mitochondrial respiratory chain findings are preliminary and based on single cases. Larger, genetically stratified natural history studies are needed before any therapeutic trial can be designed.
Evidence
Retrieved by DeepSearch across 234,678,978 indexed works and resolved on OpenAlex — ranked by citations, including the results that did not work.
Brain · 2010 · 225 citations · open access
Clinical, neuroradiological and genetic findings in pontocerebellar hypoplasia
AbstractPontocerebellar hypoplasia is a group of autosomal recessive neurodegenerative disorders with prenatal onset. The common characteristics are cerebellar hypoplasia with variable atrophy of the cerebellum and the ventral pons. Supratentorial involvement is reflected by variable neocortical atrophy, ventriculomegaly and microcephaly. Mutations in the transfer RNA splicing endonuclease subunit genes (TSEN54, TSEN2, TSEN34) were found to be associated with pontocerebellar hypoplasia types 2 and 4. Mutations in the mitochondrial transfer RNA arginyl synthetase gene (RARS2) were associated with pontocerebellar hypoplasia type 6. We studied a cohort of 169 patients from 141 families for mutations in these genes, of whom 106 patients tested positive for mutations in one of the TSEN genes or the RARS2 gene. In order to delineate the neuroradiological and clinical phenotype of patients with mutations in these genes, we compared this group with 63 patients suspected of pontocerebellar hypoplasia who were negative on mutation analysis. We found a strong correlation (P < 0.0005) between TSEN54 mutations and a dragonfly-like cerebellar pattern on magnetic resonance imaging, in which the cerebellar hemispheres are flat and severely reduced in size and the vermis is relatively spared. Mutations in TSEN54 are clinically associated with dyskinesia and/or dystonia and variable degrees of spasticity, in some cases with pure generalized spasticity. Nonsense or splice site mutations in TSEN54 are associated with a more severe phenotype of more perinatal symptoms, ventilator dependency and early death. In addition, we present ten new mutations in TSEN54, TSEN2 and RARS2. Furthermore, we show that pontocerebellar hypoplasia type 1 together with elevated cerebrospinal fluid lactate may be caused by RARS2 mutations.
Hipoplasia pontocerebelosa tipo 1: aportación de un caso
AbstractINTRODUCTION: Pontocerebellar hypoplasias constitute a group of hereditary neurodegenerative disorders of uncertain aetiopathogenesis. They have been reported as being associated with deficiencies of complexes in the mitochondrial respiratory chain (MRC) and with congenital disorders of glycosylation. On the basis of clinical and neuropathological criteria, two phenotypes can be distinguished in this condition. Pontocerebellar hypoplasia type 1 is characterised by hypoplasia of the pons and the cerebellum associated with the degeneration of the motor neurons in the anterior horn of the spinal cord. CASE REPORT: A 4-year-old female with symptoms of severe psychomotor retardation associated with microcephaly, important generalised hypotonia, muscle hypotrophy, contractions in the four limbs, absence of stretch reflex and epilepsy with onset in the neonatal period. Magnetic resonance imaging of the brain revealed pontocerebellar hypoplasia. An electroneuromyography showed a trace that was compatible with axonal neuropathy and a biopsy of the deltoid muscle revealed the existence of neurogenic muscular atrophy. In the MRC study conducted in muscle homogenate and in skin fibroblasts, complex IV values were found to be at the lower limits of what could be considered to be normal levels. Results of the genetic study for spinal muscular atrophy were negative. CONCLUSIONS: The case reported here could be included as a case of pontocerebellar hypoplasia type 1. MRC studies can be of interest in cases of pontocerebellar hypoplasia in order to explain the role it plays in this disorder.
Journal of Pediatric Neurosciences · 2014 · 2 citations
Pontocerebellar hypoplasia type 1 with a milder phenotype in a two-year-old girl
AbstractThe rare association of pontocerebellar hypoplasia with anterior horn cell involvement has been classified as pontocerebellar hypoplasia type 1. Its classic phenotype is usually severe. However, the pontocerebellar hypoplasia type 1 may have wider variability in clinical and radiological features. There may be a genetic heterogeneity as well. We described here a young girl with relatively milder clinical phenotype with cerebellar atrophy with absent pontine involvement, further adding to the clinical phenotype.
Disease module: DeepOracle (Open Targets). Structures: RDKit from PubChem SMILES. Literature: retrieved by DeepSearch across 234,678,978 indexed works (targeted per-candidate search), resolved on OpenAlex.
DeCure is a research and publication project, not medical advice and not a treatment. "DeCure for X" describes a research goal, not a claim that a cure exists. Backing a cure is a contribution to fund the research — it is not an investment, and confers no yield, royalty, equity or IP ownership. Papers are published open-access by the DeCure.ai DAO.
