Multigene profiles to guide the use of neoadjuvant chemotherapy for breast cancer: a Copenhagen Breast Cancer Genomics Study

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Estrogen receptor (ER) and human epidermal growth factor 2 (HER2) expression guide the use of neoadjuvant chemotherapy (NACT) in patients with early breast cancer. We evaluate the independent predictive value of adding a multigene profile (CIT256 and PAM50) to immunohistochemical (IHC) profile regarding pathological complete response (pCR) and conversion of positive to negative axillary lymph node status. The cohort includes 458 patients who had genomic profiling performed as standard of care. Using logistic regression, higher pCR and node conversion rates among patients with Non-luminal subtypes are shown, and importantly the predictive value is independent of IHC profile. In patients with ER-positive and HER2-negative breast cancer an odds ratio of 9.78 (95% CI 2.60;36.8), P < 0.001 is found for pCR among CIT256 Non-luminal vs. Luminal subtypes. The results suggest a role for integrated use of up-front multigene subtyping for selection of a neoadjuvant approach in ER-positive HER2-negative breast cancer.

OriginalsprogEngelsk
Artikelnummer47
Tidsskriftnpj Breast Cancer
Vol/bind9
Antal sider8
ISSN2374-4677
DOI
StatusUdgivet - 2023

Bibliografisk note

Funding Information:
C.B.P., F.C.N., H.K., I.V., L.G., M.A.M., M.L.M.T., N.K., U.B.T. reported no disclosures. B.E. reported institutional grants from Astra Zeneca, Eli Lilly, MSD, Novartis, Oncology Venture, Pfizer, Roche, and Samsung Bioepis. M.B.J. reported meeting expenses from Novartis and Advisory Board Novartis. M.R. reported personal fees from Glaxo Smith Kline and Astra Zeneca, and Advisory Board MSD.

Funding Information:
This work was supported by Neye-Fonden [no grant number] and the Novo Nordisk Foundation [grant number NNF21OC0072287].

Publisher Copyright:
© 2023, The Author(s).

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