dc.contributor.author | Bergamino, MA | |
dc.contributor.author | Morani, G | |
dc.contributor.author | Parker, J | |
dc.contributor.author | Schuster, EF | |
dc.contributor.author | Leal, MF | |
dc.contributor.author | López-Knowles, E | |
dc.contributor.author | Tovey, H | |
dc.contributor.author | Bliss, JM | |
dc.contributor.author | Robertson, JFR | |
dc.contributor.author | Smith, IE | |
dc.contributor.author | Dowsett, M | |
dc.contributor.author | Cheang, MCU | |
dc.date.accessioned | 2021-11-19T13:21:58Z | |
dc.date.available | 2021-11-19T13:21:58Z | |
dc.date.issued | 2022-03-15 | |
dc.identifier.citation | Clinical Cancer Research | |
dc.identifier.issn | 1078-0432 | |
dc.identifier.uri | https://repository.icr.ac.uk/handle/internal/4886 | |
dc.description.abstract | PURPOSE: Aromatase inhibitor (AI) treatment is the standard of care for postmenopausal women with primary estrogen receptor-positive breast cancer. The impact of duration of neoadjuvant endocrine therapy (NET) on molecular characteristics is still unknown. We evaluated and compared changes of gene expression profiles under short-term (2-week) versus longer-term neoadjuvant AIs. EXPERIMENTAL DESIGN: Global gene expression profiles from the PeriOperative Endocrine Therapy for Individualised Care (POETIC) trial (137 received 2 weeks of AIs and 47 received no treatment) and targeted gene expression from 80 patients with breast cancer treated with NET for more than 1 month (NeoAI) were assessed. Intrinsic subtyping, module scores covering different cancer pathways and immune-related genes were calculated for pretreated and posttreated tumors. RESULTS: The differences in intrinsic subtypes after NET were comparable between the two cohorts, with most Luminal B (90.0% in the POETIC trial and 76.3% in NeoAI) and 50.0% of HER2 enriched at baseline reclassified as Luminal A or normal-like after NET. Downregulation of proliferative-related pathways was observed after 2 weeks of AIs. However, more changes in genes from cancer-signaling pathways such as MAPK and PI3K/AKT/mTOR and immune response/immune-checkpoint components that were associated with AI-resistant tumors and differential outcome were observed in the NeoAI study. CONCLUSIONS: Tumor transcriptional profiles undergo bigger changes in response to longer NET. Changes in HER2-enriched and Luminal B subtypes are similar between the two cohorts, thus AI-sensitive intrinsic subtype tumors associated with good survival might be identified after 2 weeks of AI. The changes of immune-checkpoint component expression in early AI resistance and its impact on survival outcome warrants careful investigation in clinical trials. | |
dc.language | eng | |
dc.language.iso | eng | |
dc.publisher | AMER ASSOC CANCER RESEARCH | |
dc.rights.uri | https://www.rioxx.net/licenses/all-rights-reserved | |
dc.title | Impact of Duration of Neoadjuvant Aromatase Inhibitors on Molecular Expression Profiles in Estrogen Receptor-positive Breast Cancers. | |
dc.type | Journal Article | |
dcterms.dateAccepted | 2021-11-10 | |
rioxxterms.version | AM | |
rioxxterms.licenseref.uri | https://www.rioxx.net/licenses/all-rights-reserved | |
rioxxterms.licenseref.startdate | 2021-11-10 | |
rioxxterms.type | Journal Article/Review | |
dc.relation.isPartOf | Clinical Cancer Research | |
pubs.notes | Not known | |
pubs.organisational-group | /ICR | |
pubs.organisational-group | /ICR/Primary Group | |
pubs.organisational-group | /ICR/Primary Group/ICR Divisions | |
pubs.organisational-group | /ICR/Primary Group/ICR Divisions/Clinical Studies | |
pubs.organisational-group | /ICR/Primary Group/ICR Divisions/Clinical Studies/Clinical Trials & Statistics Unit | |
pubs.publication-status | Accepted | |
pubs.embargo.terms | Not known | |
icr.researchteam | Clinical Trials & Statistics Unit | |
dc.contributor.icrauthor | Schuster, Eugene | |
dc.contributor.icrauthor | Tovey, Holly | |
dc.contributor.icrauthor | Bliss, Judith | |
dc.contributor.icrauthor | Cheang, Chon | |