DeCure's autonomous Rare AI scientist is researching a drug-repurposing hypothesis for tropical spastic paraparesis — screening already-approved drugs against its 18-gene Open Targets disease module to publish open-access research. Research is fast; the path to publication is funded in milestone stages.
Disease moduleTropical spastic paraparesis maps to a 18-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 tropical spastic paraparesis 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
interferon stimulated exonuclease gene 20 (ISG20) — ISG20 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 u5pdrag to rotate · scroll to zoom
RCSB Protein Data Bank · entry 1WLJ · 1.9 Å · ligand URIDINE-5'-MONOPHOSPHATE (U5P). Experimental structure, not a prediction.
What the evidence adds up to
In the Seychelles, 21 patients with tropical spastic paraparesis were identified, of whom 14 were low-income black women. Mean age at onset was 42.8 years, range 20 to 65. Onset and progression were slow in 62% of patients. Complete paralysis developed in 8 of 21 patients (38%) after 2 to 15 years. All patients had bilateral pyramidal signs, and 6 of 21 (28%) had loss of vibratory perception. A case-control study of putative risk factors found no significant differences. In northeastern Brazil, ten possible cases were reported in patients aged 21 to 59, all of black origin and lower social class, with a slight female preponderance. Laboratory examinations excluded other compressive, infective, degenerative or demyelinating spinal cord lesions. The authors noted that an aetiological implication of HTLV-I had been shown for TSP, but they could not test for it due to lack of technical conditions.
A magnetic resonance imaging study of 30 patients (24 female, mean age 56, mean disease duration 12 years) with a clinical and virological diagnosis of TSP/HAM found no abnormal signals in the spinal cord parenchyma. Atrophy of the dorsal spinal segment was observed in 87% of patients, and those with the highest degree of atrophy showed a higher degree of functional impairment. Eleven patients had spinal cord conus atrophy, associated with neurogenic bladder or impotency. In 80% of patients, hyperintense subcortical white matter images were detected, mostly bifrontal. In half of these patients the images were small, rounded and isolated; in the other half there were eight or more images, generally larger and occasionally confluent. Ten of 12 patients with confluent brain lesions showed different degrees of cognitive impairment. No patient had lesions in the corpus callosum, periventricular white matter, pons, medulla oblongata or cerebellum.
The clinical and epidemiological features of TSP in the Seychelles appeared similar to those described in other tropical countries. The Brazilian authors stated that an aetiological implication of a retrovirus (HTLV-I) had been shown for TSP, but they could not determine it in their patients. The imaging study concluded that most TSP/HAM patients have alterations on brain or spinal cord MRI, and that these lesions are concordant with functional impairment. The characteristics of the imaging could be helpful in the differential diagnosis of patients with paraparesis.
What is still missing is prospective data linking specific viral or host factors to progression rates, standardised imaging protocols that can be used across settings to stratify patients by atrophy burden, and any trial of a therapeutic intervention. No drug was mentioned in any of these abstracts.
Evidence
Retrieved by DeepSearch across 234,678,978 indexed works and resolved on OpenAlex — ranked by citations, including the results that did not work.
Neurology · 1987 · 45 citations
Tropical spastic paraparesis in the Seychelles Islands
AbstractWe confirmed the occurrence of endemic tropical spastic paraparesis (TSP) in the Seychelles. Most patients (14/21) were low-income black women. Mean age at onset was 42.8 years (range, 20 to 65). In 62%, onset and progression were slow. Complete paralysis developed in 8/21 (38%) after an evolution of 2 to 15 years. All patients had bilateral pyramidal signs. Loss of vibratory perception occurred in 6/21 (28%). A case-control study of putative risk factors failed to show significant differences. The clinical and epidemiologic features of TSP in the Seychelles appear to be similar to those described in other tropical countries.
Arquivos de Neuro-Psiquiatria · 1989 · 31 citations · open access
Tropical spastic paraparesis in Northeastern Brazil
AbstractTen possible cases of tropical spastic paraparesis (TSP) in Northeastern Brazil (Ceará) are presented. They show the typical symptoms and signs of TSP consisting of weakness of the lower limbs, spastic gait, hyperreflexia, bladder dysfunction and variable signs of posterior columns impairment. The laboratory examinations excluded other compressive, infective, degenerative or demyelinating lesions of their spinal cord. Our patients age ranged from 21 to 59 years, all were of black origin and all were of lower social class. There was a slight preponderance of females. An etiological implication of a retrovirus (HTLV-I) has been shown for TSP, but for lack of technical conditions we could not determine it in our patients, and that stands as our subsequent step in those and further cases.
Revista médica de Chile · 2006 · 16 citations · open access
Resonancia Magnética de médula espinal y cerebro en el correlato clínico de la paraparesia espástica progresiva que se asocia al virus humano linfotrópico tipo-I (HTLV-I)
AbstractBACKGROUND: The spastic paraparesis associated to HTLV-1 causes degenerative pyramidal tract lesions of the spinal cord and affects cortical-nuclear connections in the brain. AIM: To report the findings of magnetic resonance imaging in patients with spastic paraparesis. MATERIAL AND METHODS: A magnetic resonance imaging of the brain and spinal cord was performed in 30 patients (24 females), mean age and evolution of 56 and 12 years respectively, with a clinical and virological diagnosis of tropical spastic paraparesis/HTLV-1 associated myelopathy (TSP/HAM). RESULTS: No patient had abnormal signals in the spinal cord parenchyma. However, an atrophy of the dorsal segment was observed in 87% of patients. Patients with the highest degree of atrophy showed a higher degree of functional impairment. Eleven patients had spinal cord conus atrophy, associated to neurogenic bladder or impotency. In 80% of patients, hyperintense subcortical white matter images in DP, T2 and Flair, mostly bi frontal, were detected. In half of them, small rounded and isolated images were observed. In the other half, eight or more images, generally larger and occasionally confluent, were found. Ten of 12 patients with confluent brain lesions showed different degrees of cognitive impairment. No patient had lesions in the corpus callosus, periventricular white matter, pons, medulla oblongata or cerebellum. CONCLUSIONS: Most patients with tropical spastic paraparesis have alterations in brain or spinal cord magnetic resonance imaging. The magnetic resonance lesions are concordant with functional impairment. The characteristics of the imaging in TSP/HAM patients can be helpful in the differential diagnosis of patients with paraparesis.
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.
