DeCure's autonomous Rare AI scientist is researching a drug-repurposing hypothesis for polydactyly of a biphalangeal thumb — screening already-approved drugs against its 3-gene Open Targets disease module to publish open-access research. Research is fast; the path to publication is funded in milestone stages.
Disease modulePolydactyly of a biphalangeal thumb maps to a 3-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 polydactyly of a biphalangeal thumb 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
ALX homeobox 4 (ALX4) — ALX4 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 apo structuredrag to rotate · scroll to zoom
RCSB Protein Data Bank · entry 9D9R · 2.389 Å · ligand none (apo structure). Experimental structure, not a prediction.
What the evidence adds up to
Polydactyly of a biphalangeal thumb is a congenital hand deformity. No drug treatment is described in any of the provided abstracts. The 2018 review states polydactyly is managed surgically, with preaxial (thumb-side) cases often requiring reconstructive techniques to achieve a functional, stable thumb. The 2004 paper notes that despite thumb duplication being the most common manifestation of polydactyly, surgical results are frequently disappointing, and deformities from improperly executed reductions often necessitate further corrective surgery.
The 2021 study of a six-generation Chinese family with complex radial polydactyly included nine affected individuals across six generations, with 11 of 34 family members having polydactyly. Patients presented with thumb duplication, triphalangism, triplication, hypoplasia, and symphalangism, often in both hands, with syndactyly and ulnar polydactyly also observed. Two patients underwent surgical resection of the radial supernumerary thumb using the Bilhout-Cloquet technique or On-top-plasty technique. At 8-year and 2-year post-operative follow-up, both showed good hand and thumb function.
The abstracts consistently report that surgical resection of extra digits is the main treatment option for radial polydactyly, with the radial thumb typically resected because the ulnar thumb is better developed. No pharmacological intervention is mentioned or tested in any of these studies. What is still missing is any evidence for a drug that could alter the developmental pathway of biphalangeal thumb polydactyly, as well as prospective trials with standardised surgical outcome measures and longer follow-up in larger, stratified patient groups.
Evidence
Retrieved by DeepSearch across 234,678,978 indexed works and resolved on OpenAlex — ranked by citations, including the results that did not work.
Journal of the American Academy of Orthopaedic Surgeons · 2018 · 72 citations
Polydactyly of the Hand
AbstractPolydactyly is one of the most common congenital hand deformities managed by orthopaedic surgeons. It is most often found in isolation; however, rarely, it may be associated with genetic syndromes. Polydactyly is classified as postaxial, preaxial, or central depending on the radioulnar location of the duplicated digits. Postaxial polydactyly, which affects the ulnar side of the hand, is most common and is typically managed with excision or suture ligation of the supernumerary digit. Preaxial polydactyly, which affects the thumb or radial side of the hand, often requires reconstructive techniques to ensure a functional, stable thumb. Central polydactyly is much less common, and reconstruction can be challenging.
Thumb Duplication - Simple Surgery for a Common Problem?
AbstractPolydactyly is one of the most common congenital anomalies of the hand, and thumb duplication the most common manifestation of polydactyly. Despite this, the results of surgical treatment for thumb duplication are frequently disappointing, and deformities secondary to improperly executed reduction procedures often make further corrective surgery necessary. Examples of thumb duplication, their characteristic abnormal anatomy, and the complexity of surgical reduction procedures are illustrated.
Annals of Translational Medicine · 2021 · 2 citations · open access
Complex radial polydactyly in a Chinese family: inclusion of triphalangism, triplication, and syndactyly
AbstractBACKGROUND: Few studies have investigated families in which multiple individuals over three or more generations are affected by radial polydactyly and syndactyly. This report describes an extremely rare family in which nine individuals across six generations were affected by complex radial polydactyly. METHODS: We investigated a six-generation pedigree with radial polydactyly including triplication, triphalangism, hypoplasia, and symphalangism. There was a total of 34 individuals (including their spouses) in the family and 11 individuals had polydactyly. The average age of the patients ranged from 7 months to 96 years. The characteristic feature of the malformation in these patients was described. Two patients underwent surgical resection for radial supernumerary thumbs. The Bilhout-Cloquet technique and On-top-plasty technique were used to reconstruct the nail and the joints. RESULTS: The patients in this family presented with thumb duplication and triphalangism in both hands, including a variety of deformities, such as triplication, triphalangism, hypoplasia, and symphalangism. Syndactyly and ulnar polydactyly were also frequently observed. Two patients who underwent surgical treatment showed good hand and thumb function at the 8- and 2-year post-operative follow-up, respectively. CONCLUSIONS: The present study reported various mixed phenotypes including triplication, triphalangism, hypoplasia, and symphalangism within the same family which may represent a rare type of polydactyly. Surgical resection of extra digits to achieve mobility of the thumb is the main treatment option for radial polydactyly. Given the ulnar thumb is better developed, the radial thumb is typically resected in patients with radial polydactyly. These reconstructive principles are fit for this Chinese family as well.
The Journal of Hand Surgery (Asian-Pacific Volume) · 2018 · 1 citations
A Case of Thumb Polydactyly which Ulnar Thumb Has No Active Motion in Ring Chromosome 4
AbstractThe objective of this study was to clarify the difference in thumb deformity between our case with ring chromosome 4 and thumb polydactyly, in which ulnar side was small and had no active motion, and other cases of ring chromosome 4, by analyzing previous reports. Our case had bilateral atypical thumb polydactyly, which was classified as type 4 on the right side and type 5 on the left side, according to the Japanese Society for Surgery of the Hand: Modified International Federation of Societies for Surgery of the Hand classification. Of the 39 cases in previous reports, 20 (51.3%) had thumb deformities. Among them, 19 cases (95%) showed radial ray deficiency and only 1 case (5%) showed bilateral thumb polydactyly. Clinodactyly was seen in 5 cases (12.8%). Foot deformities were present in 6 cases (15.4%). We discussed about thumb polydactyly with and without chromosomal deformities.
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.
