DeCure's autonomous Rare AI scientist is researching a drug-repurposing hypothesis for Greenberg dysplasia — 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 moduleGreenberg dysplasia 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 greenberg dysplasia 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.
What the evidence adds up to
Greenberg dysplasia is a very rare autosomal recessive chondrodystrophy that is lethal in utero. A 2008 report of three fetuses from a consanguineous Greek couple describes the characteristic moth-eaten radiographic appearance visible as early as 13 weeks gestational age. The diagnosis was confirmed by a homozygous N547D amino acid substitution in the LBR gene, making this the ninth reported case and the second of Greek origin. No treatment or survival beyond gestation is described.
A 2014 case report describes a boy with compound heterozygous LBR mutations who had an anadysplasia-like spondylometaphyseal dysplasia that spontaneously regressed. This shows that biallelic LBR mutations can produce a mild, non-lethal bone dysplasia, in contrast to the perinatal lethal Greenberg dysplasia. The natural history of this milder form could not be fully established from the earlier case.
A 2020 case report adds a fetus with typical Greenberg dysplasia confirmed by homozygosity for a pathogenic LBR variant. The authors review the literature and suggest that Greenberg dysplasia, dappled diaphyseal dysplasia, and Astley–Kendall dysplasia are allelic disorders, all linked to LBR. They also note that conditions with abnormal sterol metabolism but different genetic causes, such as X-linked dominant chondrodysplasia punctata and CHILD syndrome, can have similar clinical and radiographic features.
No drug treatment is mentioned in any of these abstracts. What is missing is any clinical trial, any attempt at prenatal or postnatal intervention, and any understanding of whether the milder LBR-related bone dysplasias might be modifiable. Patient stratification by specific LBR mutation type and functional effect is not yet possible given the small number of cases. Funding for natural history studies and for any preclinical work on cholesterol pathway modulation in LBR deficiency has not 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.
Prenatal Diagnosis · 2008 · 50 citations
Pathologic, radiographic and molecular findings in three fetuses diagnosed with HEM/Greenberg skeletal dysplasia
AbstractBACKGROUND: Greenberg skeletal dysplasia is a very rare, autosomal recessive, in utero, lethal chondrodystrophy for which only eight index cases of diverse ethnic origin have been reported so far. The defect is associated with a defect in cholesterol biosynthesis and due to mutations in the gene encoding the lamin B receptor (LBR). METHODS: A familial case of three fetuses of a consanguineous Greek couple is presented including prenatal, physical, radiographic, histopathologic, and molecular genetic findings. RESULTS: The tentative diagnosis of Greenberg skeletal dysplasia based on pathological findings was confirmed by the identification of a homozygous, N547D amino acid substitution in the LBR gene in the third affected fetus. CONCLUSION: The present case represents the ninth described case of Greenberg dysplasia and the second case of Greek origin. The characteristic 'moth-eaten' radiographic appearance is already seen at 13 weeks' gestational age.
American Journal of Medical Genetics Part A · 2014 · 17 citations
An anadysplasia‐like, spontaneously remitting spondylometaphyseal dysplasia secondary to lamin B receptor (<i>LBR</i>) gene mutations: Further definition of the phenotypic heterogeneity of <i>LBR</i>‐bone dysplasias
AbstractWe describe a boy who has an anadysplasia-like spondylometaphyseal dysplasia. By whole exome sequencing he was shown to have compound heterozygous mutations of LBR that codes for the lamin B receptor. He shares many similarities with a case previously described, but in whom the early natural history could not be established [Borovik et al., 2013]. Thus, in addition to Greenberg dysplasia (a perinatal lethal disorder), homozygosity or compound heterozygosity of mutations in LBR can result in a mild, spontaneously regressing bone dysplasia.
Molecular Genetics & Genomic Medicine · 2020 · 6 citations · open access
A new case of Greenberg dysplasia and literature review suggest that Greenberg dysplasia, dappled diaphyseal dysplasia, and Astley–Kendall dysplasia are allelic disorders
AbstractBACKGROUND: Greenberg dysplasia is a rare, autosomal recessive, prenatal lethal bone dysplasia caused by biallelic pathogenic variants in the lamin B receptor (LBR) gene. Pathogenic variants in LBR are also associated with Pelger-Huët anomaly, an autosomal dominant benign abnormality of the nuclear shape and chromatin organization of blood granulocytes, and Pelger-Huët anomaly with variable skeletal anomalies, a mild, regressing to moderate-severe autosomal recessive condition. Conditions with abnormal sterol metabolism and different genetic basis have clinical and radiographic features similar to Greenberg dysplasia, for example X-linked dominant chondrodysplasia punctata, Conradi-Hünermann type, and CHILD syndrome, and other conditions with unknown genetic etiology display very similar features, for example, dappled diaphyseal dysplasia and Astley-Kendall dysplasia. METHODS: We present a fetus with typical clinical and radiographic features of Greenberg dysplasia, and review the literature. RESULTS: Genetic testing confirmed the diagnosis Greenberg dysplasia: homozygosity for a pathogenic variant in LBR. CONCLUSION: Comparing the clinical and radiographic phenotypes of Greenberg dysplasia, dappled diaphyseal dysplasia, and Astley-Kendall dysplasia, we suggest that these are allelic disorders.
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.
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