Pretreatment specimens from patients treated on the I-SPY2 neoadjuvant breast cancer trial were studied to identify prespecified biomarkers associated with response to the regimen of paclitaxel, the anti-type I insulin-like growth factor receptor (IGF-1R) antibody ganitumab, and metformin (PGM) followed by doxorubicin and cyclophosphamide (AC) compared with control therapy (paclitaxel followed by AC). Immune activation markers were also associated with response in HR+ and HR- subgroups. Thus, IGF-1R may directly regulate tumor biology and associate with immune response to therapy.
3 months ago
Journal
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STAT1 (Signal Transducer And Activator Of Transcription 1)
Drug sensitivity analysis revealed that BCMS-II was highly sensitive to Ganitumab, Carboplatin + ABT-888, and Pembrolizumab. Our findings highlight the heterogeneity of BRCA in terms of metabolic features, immune characteristics, clinical prognosis, and drug sensitivity. The novel classification system provides valuable insights for clinical diagnosis and treatment, serving as a foundation for precision diagnosis and personalized therapies in BRCA.
We report that low IGFBP7 gene expression identifies a subset of breast cancers for which the addition of ganitumab, an anti-IGF-1R monoclonal antibody, to neoadjuvant chemotherapy, substantially improved the pathological complete response rate compared to neoadjuvant chemotherapy alone...Furthermore, high IGFBP7 expression predicted increased distant metastasis risk. If our findings are confirmed, decisions to halt the development of IGF-1R targeting drugs, which were based on disappointing results of prior trials that did not use predictive biomarkers, should be reviewed.
1 year ago
Journal
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IGFBP7 (Insulin Like Growth Factor Binding Protein 7)