DeCure's autonomous Rare AI scientist is researching a drug-repurposing hypothesis for occipital horn syndrome — screening already-approved drugs against its 2-gene Open Targets disease module to publish open-access research. Research is fast; the path to publication is funded in milestone stages.
Disease moduleOccipital horn syndrome maps to a 2-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 occipital horn syndrome 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
phosphoglycerate kinase 1 (PGK1) — PGK1 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 atpdrag to rotate · scroll to zoom
RCSB Protein Data Bank · entry 9FDF · 1.44 Å · ligand ADENOSINE-5'-TRIPHOSPHATE (ATP). Experimental structure, not a prediction.
What the evidence adds up to
Occipital horn syndrome is an X-linked connective tissue disorder caused by mutations in the ATP7A gene, which encodes a copper-transporting ATPase. In a study of 17 unrelated Japanese males with Menkes disease and 2 with occipital horn syndrome, one occipital horn syndrome patient had a splice-site mutation in intron 6 that produced both normal-size and smaller-size transcripts. His cultured skin fibroblasts contained 19% of the normal level of normal-size transcripts. His serum copper and ceruloplasmin levels were normal, but his cultured fibroblasts had increased copper content. The authors concluded that his mild clinical manifestations were due to the presence of normal-size, presumably functional transcripts. In a separate patient, a deletion of one of three tandem 98 bp repeats situated upstream of the transcription start site was detected; this deletion was not found in 110 unaffected individuals, and no other mutation was identified by RT-PCR, chemical cleavage mismatch analysis, or cDNA sequencing. The deletion reduced expression of a reporter gene, though quantitative analysis of MNK mRNA from a patient cell line showed no detectable reduction.
The distinctive clinical features, based on a review of 20 previously published cases plus one new 18-year-old patient, include unusual facial appearance, skeletal abnormalities (occipital horns, short broad clavicles, deformed radii, ulnae, and humeri, narrowing of the rib cage, undercalcified long bones with thin cortical walls, coxa valga), chronic diarrhoea, and genitourinary abnormalities. A 2022 case report of an 18-year-old treated for flat-valgus foot and posterior elbow dislocation noted that 32 cases had been reported worldwide. That report stated there is no effective causal therapy, and that surgical procedures can help maintain joint range of motion. A neuropathology report on a severely mentally retarded man who died at age 26 described neovascularisation and extreme reduplication of the cerebral arteries with cystic medial degeneration, bilateral cerebellar hypoplasia, focal cortical dysplasia, and cerebellar heterotopias—findings similar to those in Menkes disease.
One 1980 paper on occipital horn asymmetry in 75 young neurological patients found the left occipital horn longer than the right in 29 instances and the right longer than the left in 13 (p < 0.025), but this paper did not study occipital horn syndrome specifically and its relevance to the syndrome is unclear. What remains missing is any clinical trial of a treatment, any systematic natural history study with modern biomarkers, and any patient stratification by residual ATP7A function—without which the variable severity from mild to severely disabling cannot be predicted or managed prospectively.
Evidence
Retrieved by DeepSearch across 234,678,978 indexed works and resolved on OpenAlex — ranked by citations, including the results that did not work.
American Journal of Medical Genetics · 2001 · 88 citations
ATP7A gene mutations in 16 patients with Menkes disease and a patient with occipital horn syndrome
AbstractGenomic DNA of 17 unrelated Japanese males with Menkes disease and 2 Japanese males with occipital horn syndrome were studied for mutations in the ATP7A gene. Using SSCP analysis and direct sequencing of the exons and the 5'-upstream region of the gene amplified by PCR, we identified 16 mutations in 16 of 17 males with Menkes disease, including 4 deletions, 2 insertions, 6 nonsense mutations, 2 missense mutations, and 2 splice-site mutations. All these mutations were those that affect the function of the gene. Of the two males with occipital horn syndrome, one had a splice-site mutation in intron 6 that led to normal-size and smaller-size transcripts. The amount of the normal-size transcripts in his cultured skin fibroblasts was 19% of the normal level. His serum copper and ceruloplasmin levels were normal, whereas his cultured skin fibroblasts contained increased levels of copper. These findings indicate that his mild clinical manifestations were due to the presence of normal-size and presumably functional transcripts of the gene. DNA sequencing analysis of the exons and 5'-upstream region of the ATP7A gene in 20 normal individuals and the 19 affected males identified 25 polymorphisms.
Occipital horn syndrome: report of a patient and review of the literature
AbstractWe report an 18-year-old boy with occipital horn syndrome and we review the 20 cases previously published with this syndrome. The distinctive features common to all patients were unusual facial appearance, skeletal abnormalities, chronic diarrhea and genitourinary abnormalities. The skeletal abnormalities included occipital horns, short, broad clavicles, deformed radii, ulnae, and humeri, narrowing of the rib cage, undercalcified long bones with thin cortical walls and coxa valga. Occipital horn syndrome is inherited in an X-linked recessive fashion. Our analysis indicates that occipital horn syndrome is associated with a recognizable characteristic phenotype.
A repeated element in the regulatory region of the MNK gene and its deletion in a patient with occipital horn syndrome
AbstractOccipital horn syndrome (OHS), an X-linked connective tissue disorder, has recently been shown to result from mutations in the Menkes disease gene (MNK), which encodes a copper-transporting ATPase. By Southern analysis we detected a small deletion in a region 5' to the MNK gene in one patient with OHS. Genomic clones from an unaffected individual were isolated and sequenced, revealing three tandem 98 bp repeats situated upstream of the reported transcription start site, and analysis of the patient's DNA showed a deletion of one of the repeats. The deletion is likely to be responsible for the disease in this patient, as it was not observed in 110 unaffected individuals analyzed, and no other mutation in the patient was detected by RT-PCR and chemical cleavage mismatch analysis or by cDNA sequence analysis. The deletion is associated with a dramatic decrease in expression of a chloramphenicol acetyltransferase reporter gene, implicating the repeat sequences in regulation of MNK expression, although a quantitative analysis of MNK mRNA from a cell line derived from the patient shows no detectable reduction. Other experiments revealed no effect on the site of transcription initiation, termination or on splicing.
AbstractIn 75 young neurological patients ranging in age from 5 months to nearly 18 years, the left occipital horn was longer than the right in 29 instances whereas the right was longer than the left in only 13 cases (p < 0.025). Elongations of the right occipital horn as well as symmetrical horns were associated with cerebral damage incurred prior to the end of the first year of life (p = 0.06).
AbstractOccipital horn syndrome, formerly known as Ehlers-Danlos syndrome type IX or X-linked cutis laxa, is an allelic variant of Menkes' syndrome. Although the clinical symptomatology and systemic pathology findings have been well described in occipital horn syndrome, the neuropathology has not previously been reported. A kindred affected by the X-linked occipital horn syndrome is followed at the University of Alabama at Birmingham. A severely mentally retarded dysmorphic man, who died at the age of 26 years, never gained the ability to walk or talk. Among other findings at autopsy, the patient had the skeletal anomalies previously described with occipital horn syndrome. Neuropathologic findings included neovascularization and extreme reduplication of the cerebral arteries, in conjunction with cystic medial degeneration; bilateral cerebellar hypoplasia; focal cortical dysplasia, and cerebellar heterotopias. These findings are similar to those seen in the brains of patients with Menkes' syndrome, which is not surprising, given the known phenotypic overlap and the proven allelism of occipital horn syndrome with classic Menkes' syndrome.
Egyptian Journal of Medical Human Genetics · 2022 · 2 citations · open access
Orthopaedic interventions in occipital horn syndrome: a rare case of mutation in ATP7A gene
AbstractAbstract Background Occipital horn syndrome is a rare, X-linked recessive, connective tissue disorder caused by abnormal copper transporter proteins coded by the ATP7A gene. 32 cases have been reported worldwide to date. Clinically, patients typically present with inguinal hernia, exostosis, cutis laxa, and bladder diverticula. Orthopaedic problems often include exostosis of the elbows, thoracolumbar scoliosis, thoracic cavity deformities, and joint hypermobility due to joint laxity. Case presentation An 18-year-old presented with occipital horn syndrome and was treated for flat-valgus foot and posterior dislocation of the elbow joints. Due to collagen structure abnormalities, vulnerability to joint deformation makes treating patients with occipital horn syndrome challenging as they need complex orthopaedic intervention. Conclusion There is no effective causal therapy for this condition. Surgical procedures can help patients improve their physical condition and maintain adequate joint range of motion.
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.
