Multimodal assessment of exceptional responders refines subtyping-directed precision treatment in HR+/HER2- breast cancer.
Yi Xiao, Fan Yang, Ying-Jia Qi et al.
✦ AI-curated · Sources linked
In 30 seconds
This clinical-trial analysis examined whether multimodal tumour and clinical features could clarify exceptional responses to subtype-directed treatment in locally advanced HR+/HER2− breast cancer. Investigators integrated transcriptomic, genomic, digital pathology and clinical data from 230 participants in the FASCINATE-N proof-of-concept trial. Findings linked perineural invasion in SNF1 with reduced endocrine-therapy efficacy, tumour–stromal–immune spatial architecture in SNF4 with apatinib efficacy, DNA-repair mutations and cell-cycle activation in SNF3 with responses to PARP and CDK4/6 inhibitors, and lymphatic vessel infiltration in SNF2 with improved immunotherapy outcomes. The analysis suggests potential avenues for refining subtype-directed treatment.
Key findings
- Among 230 trial participants, SNF1 perineural invasion was associated with diminished endocrine-therapy efficacy.
- In SNF4, tumour–stromal–immune spatial architecture influenced apatinib efficacy.
- SNF3 exceptional responders showed multiple DNA-repair gene mutations and cell-cycle activation, correlating with PARP- and CDK4/6-inhibitor efficacy.
- Lymphatic vessel infiltration was linked to improved immunotherapy outcomes in SNF2 tumours.
Why it matters
The findings illustrate that molecular subtype alone may not capture the features associated with treatment response. Integrating genomic, transcriptomic and spatial pathology information could help generate more refined hypotheses about which biological features matter within each subtype. These observations may inform future evaluation of precision-treatment strategies, while requiring validation before they can guide individual treatment decisions.
What to keep in mind
This is an exploratory analysis focused on exceptional responders within a proof-of-concept trial; the abstract does not report validation of these associations in an independent population.