DeCure's autonomous Rare AI scientist is researching a drug-repurposing hypothesis for cataract 8 multiple types — 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 moduleCataract 8 multiple types 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 cataract 8 multiple types 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
crystallin gamma D (CRYGD) — CRYGD 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 mnbdrag to rotate · scroll to zoom
RCSB Protein Data Bank · entry 9G3W · 1.8 Å · ligand 5-MERCAPTO-2-NITRO-BENZOIC ACID (MNB). Experimental structure, not a prediction.
What the evidence adds up to
Cataract is the most common cause of blindness worldwide, and congenital cataracts are both phenotypically and genotypically heterogeneous. One hundred and fifteen genes have been associated with syndromic and non-syndromic cataract, with 38 disease-causing genes identified for isolated cataract. In a family with hereditary cataracts, a C > A transversion at nucleotide 264 in GJA8, coding for connexin 50, caused a p.P88T mutation. When plasmids carrying wild-type and mutant mouse Gja8 were expressed in HEK293 cells and human lens epithelial cells, the mutant protein showed changes in localisation patterns, accumulation of the mutant protein, and increased cell growth.
Two single nucleotide polymorphisms in GJA8, rs1495960 and rs9437983, were investigated in 96 age-related cataract patients and 208 matched healthy controls. No significant differences in genotype or allele distributions were seen for rs1495960. The allele distribution of rs9437983 differed between cases and controls, but its genotype distribution did not. Cataract patients had a significantly lower G-G haplotype frequency (4.9% vs. 15.5%, P = 0.0001) and a significantly higher G-A haplotype frequency (45.6% vs. 36.4%, P = 0.030) than controls. These differences increased when analysis was limited to nuclear cataract cases. The results support GJA8 as a possible susceptibility gene for age-related cataracts.
Associations between lens features graded by the Oxford Clinical Cataract Classification and Grading System were studied in 560 subjects from the Melton Eye Study. Within subjects, white nuclear scatter and brunescence were closely related, as were coronary flakes and focal-dots, but these two groupings were negatively associated. Cortical spoke, fibrefolds and waterclefts were all associated with one another, and this group was positively associated with coronary flakes and focal-dots. Posterior subcapsular and anterior subcapsular opacity were associated with one another and with cortical spokes. These associations may help define cataract subtypes and identify early cataract development.
What is still missing is a clear pharmacological target that has been tested in humans for any cataract type. The molecular genetics work identifies mutations and possible susceptibility genes, but no drug has been studied in a clinical trial for cataract reversal or prevention. No trial design, patient stratification strategy, or funding for a repurposing study has been reported.
Evidence
Retrieved by DeepSearch across 234,678,978 indexed works and resolved on OpenAlex — ranked by citations, including the results that did not work.
British Journal of Ophthalmology · 2020 · 85 citations · open access
AbstractCataract is the most common cause of blindness in the world; during infancy and early childhood, it frequently results in visual impairment. Congenital cataracts are phenotypically and genotypically heterogeneous and can occur in isolation or in association with other systemic disorders. Significant progress has been made in identifying the molecular genetic basis of cataract; 115 genes to date have been found to be associated with syndromic and non-syndromic cataract and 38 disease-causing genes have been identified to date to be associated with isolated cataract. In this review, we briefly discuss lens development and cataractogenesis, detail the variable cataract phenotypes and molecular mechanisms, including genotype-phenotype correlations, and explore future novel therapeutic avenues including cellular therapies and pharmacological treatments.
Scientific Reports · 2014 · 43 citations · open access
Identification of a Novel GJA8 (Cx50) Point Mutation Causes Human Dominant Congenital Cataracts
AbstractHereditary cataracts are clinically and genetically heterogeneous lens diseases that cause a significant proportion of visual impairment and blindness in children. Human cataracts have been linked with mutations in two genes, GJA3 and GJA8, respectively. To identify the causative mutation in a family with hereditary cataracts, family members were screened for mutations by PCR for both genes. Sequencing the coding regions of GJA8, coding for connexin 50, revealed a C > A transversion at nucleotide 264, which caused p.P88T mutation. To dissect the molecular consequences of this mutation, plasmids carrying wild-type and mutant mouse ORFs of Gja8 were generated and ectopically expressed in HEK293 cells and human lens epithelial cells, respectively. The recombinant proteins were assessed by confocal microscopy and Western blotting. The results demonstrate that the molecular consequences of the p.P88T mutation in GJA8 include changes in connexin 50 protein localization patterns, accumulation of mutant protein, and increased cell growth.
Associations between lens features assessed in the Oxford Clinical Cataract Classification and Grading System
AbstractPURPOSE: To study the associations between eleven lens features graded according to the Oxford Clinical Cataract Classification and Grading System (OCCCGS). METHOD: 560 subjects taking part in the Melton Eye Study had their lenses graded according to the OCCCGS by one of two examiners. Associations between features were examined using log-linear models for categorised grades. Adjustment was made for age, sex and grader. RESULTS: Within subjects, the two nuclear features, white nuclear scatter and brunescence, are closely related with one another, as are coronary flakes and focal-dots, but these two groupings are negatively associated. Cortical spoke, fibrefolds and waterclefts are all associated with one another and this group is positively associated with coronary flakes and focal-dots. Posterior subcapsular and anterior subcapsular opacity are associated with one another and with cortical spokes. A within-eye analysis gives similar results. CONCLUSION: These associations may be important in defining cataract subtypes and in identifying minor features that indicate early cataract development.
Revista de la Facultad de Derecho de la Universidad Complutense · 1997 · 0 citations · open access
Principio democrático y principio de autonomía
AbstractGJA8 plays an important role in lens growth and transparency. Therefore, we hypothesized that two single nucleotide polymorphisms (SNPs) in GJA8 might be associated with age-related cataract. We investigated the SNPs rs1495960 and rs9437983 using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and DNA sequencing, in 96 age-related cataract patients, and 208 gender- and age-matched healthy controls. No significant differences between cases and controls were seen in genotype or allele distributions of rs1495960 (P > 0.05). The allele distribution of rs9437983 was different between cases and controls, but no difference was detected in its genotype distribution. Cataract patients had a significantly lower G-G haplotype frequency (4.9% vs. 15.5%, P = 0.0001), and a significantly higher G-A haplotype frequency (45.6% vs. 36.4%, P = 0.030) than controls. Limiting to nuclear cataract cases significantly increased the differences between cases and controls for G-G and G-A haplotypes. These results support that the GJA8 gene may be a novel susceptibility gene for age-related cataracts.
AbstractThis analysis demonstrates the clinical utility of this test, providing examples where it altered clinical management, directed care pathways, and enabled more accurate genetic counseling. This comprehensive screen will extend access to genetic testing and lead to improved diagnostic and management outcomes through a stratified medicine approach. Establishing more robust genotype-phenotype correlations will advance knowledge of cataract-forming mechanisms.
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.
