DeCure's autonomous Rare AI scientist is researching a drug-repurposing hypothesis for mirror movements 2 — 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 moduleMirror movements 2 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 mirror movements 2 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
RAD51 recombinase (RAD51) — RAD51 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 9TRM · 2.4 Å · ligand ADENOSINE-5'-TRIPHOSPHATE (ATP). Experimental structure, not a prediction.
What the evidence adds up to
Mutations in RAD51 have been linked to human Congenital Mirror Movements (CMM). In mouse primary motor cortex neurons, Rad51 protein redistributes distally down the axon in response to Netrin-1. Rad51 siRNA knockdown exaggerates Netrin-1-mediated neurite branching and filopodia formation; RAD51 overexpression inhibits these responses, while overexpression of the CMM-linked R250Q mutation, a predicted loss-of-function, has no effect. Unc5b and Unc5c transcripts are downregulated after Rad51 knockdown and upregulated with RAD51 overexpression, but not with R250Q. Rad51 appears to negatively regulate Netrin-1 signalling, at least in part by modulating Unc5 expression. The authors conclude that imbalance of positive and negative influences likely leads to aberrant motor system development resulting in CMM.
Genetic characterisation of a family with autosomal dominant mirror movements identified ARHGEF7, a RhoGEF, as a candidate gene. Arhgef7 and its partner Git1 bind directly to Dcc, the Netrin-1 receptor. Arhgef7 and Git1 are required for Netrin-1-mediated axon guidance and act as a multifunctional effector complex: they activate Rac1 and Cdc42 and inhibit Arf1 downstream of Netrin-1, and via Arf1 mediate the Netrin-1-induced increase in cell surface Dcc. Mice heterozygous for Arhgef7 have defects in commissural axon trajectories and increased symmetrical paw placements during skilled walking, a mirror movement-like phenotype.
Mirror therapy is described in two unrelated contexts. In a 39-year-old patient whose right leg was amputated at age 17 for osteosarcoma, mirror therapy for phantom limb pain yielded positive subjective feedback, with benefit still present six months after start. The report is a single case, not a controlled trial. In children with unilateral spastic cerebral palsy, a targeted bimanual intensive therapy was evaluated for reducing the negative impact of mirror movements on bimanual activities; no results are given in the abstract. A separate 2018 study on mirror therapy protocols for hemiparetic upper extremity suggests gross motor activities yield the most realistic protocols, but no efficacy data are reported.
No drug treatment for mirror movements is described in any of these abstracts. What is missing is a therapy that directly addresses the molecular pathways identified — Rad51, ARHGEF7, Git1, DCC, Netrin-1 signalling — in patients. No clinical trial of a small molecule or biologic targeting these proteins has been reported. The genetic and mechanistic work remains preclinical, in mouse neurons and cultured cells. Patient stratification by specific mutation (RAD51 versus ARHGEF7 versus DCC) has not been attempted in a treatment context. Funding for drug development or repurposing screens in this rare disorder is absent from the public record.
Evidence
Retrieved by DeepSearch across 234,678,978 indexed works and resolved on OpenAlex — ranked by citations, including the results that did not work.
Scientific Reports · 2017 · 28 citations · open access
A novel role for the DNA repair gene Rad51 in Netrin-1 signalling
AbstractMutations in RAD51 have recently been linked to human Congenital Mirror Movements (CMM), a developmental disorder of the motor system. The only gene previously linked to CMM encodes the Netrin-1 receptor DCC, which is important for formation of corticospinal and callosal axon tracts. Thus, we hypothesised that Rad51 has a novel role in Netrin-1-mediated axon development. In mouse primary motor cortex neurons, Rad51 protein was redistributed distally down the axon in response to Netrin-1, further suggesting a functional link between the two. We next manipulated Rad51 expression, and assessed Netrin-1 responsiveness. Rad51 siRNA knockdown exaggerated Netrin-1-mediated neurite branching and filopodia formation. RAD51 overexpression inhibited these responses, whereas overexpression of the CMM-linked R250Q mutation, a predicted loss-of-function, had no effect. Thus, Rad51 appears to negatively regulate Netrin-1 signalling. Finally, we examined whether Rad51 might operate by modulating the expression of the Unc5 family, known negative regulators of Netrin-1-responsiveness. Unc5b and Unc5c transcripts were downregulated in response to Rad51 knockdown, and upregulated with RAD51 overexpression, but not R250Q. Thus, Rad51 negatively regulates Netrin-1 signalling, at least in part, by modulating the expression of Unc5s. Imbalance of positive and negative influences is likely to lead to aberrant motor system development resulting in CMMs.
Science Advances · 2023 · 21 citations · open access
Genetics of mirror movements identifies a multifunctional complex required for Netrin-1 guidance and lateralization of motor control
AbstractMirror movements (MM) disorder is characterized by involuntary movements on one side of the body that mirror intentional movements on the opposite side. We performed genetic characterization of a family with autosomal dominant MM and identified ARHGEF7 , a RhoGEF, as a candidate MM gene. We found that Arhgef7 and its partner Git1 bind directly to Dcc. Dcc is the receptor for Netrin-1, an axon guidance cue that attracts commissural axons to the midline, promoting the midline crossing of axon tracts. We show that Arhgef7 and Git1 are required for Netrin-1–mediated axon guidance and act as a multifunctional effector complex. Arhgef7/Git1 activates Rac1 and Cdc42 and inhibits Arf1 downstream of Netrin-1. Furthermore, Arhgef7/Git1, via Arf1, mediates the Netrin-1–induced increase in cell surface Dcc. Mice heterozygous for Arhgef7 have defects in commissural axon trajectories and increased symmetrical paw placements during skilled walking, a MM-like phenotype. Thus, we have delineated how ARHGEF7 mutation causes MM.
Mirror therapy for phantom limb pain in an adolescent cancer survivor.
AbstractAIMS AND BACKGROUND: Several pediatric tumors require mutilating procedures in order to be treated effectively. Although the pain caused by the surgery is usually of a transient nature, the perception of pain in the amputated limb may persist. This prolonged pain, which is often refractory to pain-killing medication, may severely affect the patient's quality of life. The phenomenon of phantom limb pain (or phantom limb syndrome) has been investigated using neurological, neurophysiological and psychopathological approaches. Here we discuss the advantages of an unconventional rehabilitation technique, the recently reported mirror therapy, whose positive effects might be due, according to some researchers, to neuronal plasticity mechanisms. CASE REPORT: We describe the use of mirror therapy to treat phantom limb syndrome in a 39-year-old patient whose right leg had been amputated at the age of 17 because of an osteosarcoma. The patient suffered from frequent episodes of pain, with severely negative effects on his quality of life. RESULTS: We obtained positive subjective feedback from the patient, who reported having benefited significantly from using the mirror. The beneficial effect was still present six months after the start of mirror therapy. CONCLUSIONS: The reported case highlights the value of an integrated multidisciplinary approach including neurological/physiatric assessment, clinical psychological support, physiotherapy and other, unconventional treatment modalities. This report should guide future studies towards the application of mirror therapy in order to elucidate its effects and efficacy.
Learning to Cope with Mirror Movements in Activities of Daily Living: Effects of Targeted Bimanual Therapy in Children with Unilateral Spastic CP
AbstractBackground and Purpose: Many children with USCP show involuntary movements of the other hand during voluntary unimanual movements, so-called mirror movements (MM). These MM negatively influence many bimanual activities of daily living. But no therapeutic regime is described so far which specifically addresses these MM. Our aim was to evaluate if a targeted bimanual intensive therapy reduces the negative impact of MM on bimanual activities, and reduces the severity of MM in these children in general.
American Journal of Occupational Therapy · 2018 · 0 citations
Exploring Protocols for Mirror Therapy: What Do They Look Like?
AbstractDate Presented 4/19/2018 Mirror therapy has been shown to be an effective intervention for the hemiparetic upper extremity. This study suggests that gross motor activities and movements yield the most realistic mirror therapy protocols. These findings can enhance implementation of mirror therapy and protocol development. Primary Author and Speaker: Veronica Rowe Additional Authors and Speakers: Mallory Halverson
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.
