ArticleNPJ breast cancer2026
Constitutional BRCA1 Methylation is associated with high level of tumoral BRCA1 methylation and homologous recombination deficiency in triple-negative breast cancer.
Article in NPJ breast cancer, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03017573 (Prospective Biobanking Study in Cancer Patients Aiming at Better Understand the Link Between the Molecular Alterations of the Tumor Itself, Its Microenvironment and Immune Response), which is not on this map. Cited by 4 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Prospective Biobanking Study in Cancer Patients Aiming at Better Understand the Link Between the Molecular Alterations of the Tumor Itself, Its Microenvironment and Immune Response (SCANDARE)
Who cites it
4 citing papers in PubMed.
- PARP Inhibitor Sensitivity in Tumors Harboring Non-BRCA Homologous Recombination Gene Alterations: Current Evidence Across Ovarian, Breast, Prostate, and Pancreatic Cancers.International journal of molecular sciences · 2026Review
- ROS-Induced DNA Damage Enhances Sensitivity to PARP Inhibition in HSC3 and SCC25 Head and Neck Squamous Cell Carcinoma Cell Lines.Current issues in molecular biology · 2026Article
- Estrogen receptor-positive, BRCA1-deficient breast cancer: BRCA1-epimutated tumors presenting a piece to the puzzle.Breast cancer research : BCR · 2026Review
- Emerging Approaches in Breast Cancer: From Molecular Mechanisms to Diagnosis and Therapeutic Strategies.Oncology research · 2026Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
22 authors.
Funding
Abstract
Tumoral BRCA1 promoter methylation occurs frequently in triple-negative breast cancer (TNBC) and contributes to homologous recombination deficiency (HRD). While constitutional BRCA1 methylation has been described, its relationship with tumoral methylation, genomic instability, and prognosis remains unclear. Paired tumor and blood samples from 136 TNBC patients (SCANDARE, NCT03017573) were analyzed for BRCA1 methylation, genomic alterations, HRD and outcomes. Constitutional BRCA1 methylation was detected in 20.6% of patients and tumoral methylation in 31.6%, including 11.5% with somatic-only methylation. In cases with constitutional BRCA1 methylation, tumoral methylation levels increased markedly, with 89% of high-methylation tumors (≥50%) associated with a Loss of Heterozygoty. Tumors with BRCA1 promoter methylation consistently exhibited high HRD (Homologous Recombination Deficiency) scores, comparable to those with pathogenic HRR (Homologous Recombination Repair) gene pathogenic variants (p < 0.001). Conversely, HRD was rare in tumors lacking both BRCA1 methylation and HRR gene alterations. Prognostically, constitutional BRCA1 methylation tended to associate with improved survival, while somatic-only methylation showed a trend toward poorer outcomes (p = 0.06). Constitutional BRCA1 methylation is associated with a high level of tumoral BRCA1 promoter methylation and HRD in TNBC. These findings support integrating constitutional and tumoral BRCA1 methylation into HRD assessment to improve patient stratification and precision treatment in TNBC.
Identifiers
What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.