ArticleBritish journal of cancer2024
p4EBP1 staining predicts outcome in ER-positive endocrine-resistant metastatic breast cancer patients treated with everolimus and exemestane.
Article in British journal of cancer, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02444390 (Identification of the Molecular Alterations Associated With Resistance to Endocrine Therapy and Impacting Treatment With mTOR Inhibitor of HR+ Metastatic Breast Cancer in Post-menopausal Women), which is not on this map. Cited by 2 papers.
What it found
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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.
Identification of the Molecular Alterations Associated With Resistance to Endocrine Therapy and Impacting Treatment With mTOR Inhibitor of HR+ Metastatic Breast Cancer in Post-menopausal Women
Who cites it
2 citing papers in PubMed, 2 citations in OpenAlex.
- Genomic landscape of estrogen receptor-positive HER2-negative advanced breast cancer with acquired resistance to aromatase inhibitors: Identification of an ESR1 alteration-related gene signature.British journal of cancer · 2025Article
- MicroRNA 195, lactate dehydrogenase 5, phosphatase and tensin homologue in colorectal cancer: Clinicopathology and prognosis.World journal of gastrointestinal surgery · 2025Article
Corrections and comments
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Authors and funding
19 authors at 8 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundTo identify patients most likely to respond to everolimus, a mammalian target of rapamycin (mTOR) inhibitor, a prospective biomarker study was conducted in hormone receptor-positive endocrine-resistant metastatic breast cancer patients treated with exemestane-everolimus therapy.
methodsMetastatic tumor biopsies were processed for immunohistochemical staining (p4EBP1, PTEN, pAKT, LKB1, and pS6K). ESR1, PIK3CA and AKT1 gene mutations were detected by NGS. The primary endpoint was the association between the p4EBP1 expression and clinical benefit rate (CBR) at 6 months of everolimus plus exemestane treatment.
resultsOf 150 patients included, 107 were evaluable for the primary endpoint. p4EBP1 staining above the median (Allred score ≥6) was associated with a higher CBR at 6 months (62% versus 40% in high-p4EBP1 versus low-p4EBP1, χ2 test, p = 0.026) and a longer progression-free survival (PFS) (median PFS of 9.2 versus 5.8 months in high-p4EBP1 versus low-p4EBP1; p = 0.02). When tested with other biomarkers, only p4EBP1 remained a significant predictive marker of PFS in multivariate analysis (hazard ratio, 0.591; p = 0.01).
conclusionsThis study identified a subset of patients with hormone receptor-positive endocrine-resistant metastatic breast cancer and poor outcome who would derive less benefit from everolimus and exemestane. p4EBP1 may be a useful predictive biomarker in routine clinical practice. CLINICAL
trial registrationNCT02444390.
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