TY - JOUR
T1 - The prognostic and predictive value of the luminal-like subtype in hormone receptor-positive breast cancer
T2 - an analysis of the DATA trial
AU - Lammers, S. W.M.
AU - Geurts, S.M.E.
AU - Hermans, K.E.P.E.
AU - Kooreman, L. F.S.
AU - Swinkels, A. C.P.
AU - Smorenburg, C. H.
AU - van der Sangen, M. J.C.
AU - Kroep, J. R.
AU - Honkoop, A. H.
AU - van den Berkmortel, F. W.P.J.
AU - de Roos, W. K.
AU - Linn, S. C.
AU - Imholz, A. L.T.
AU - Vriens, I. J.H.
AU - Tjan-Heijnen, V. C.G.
N1 - Publisher Copyright:
© 2025 The Author(s)
PY - 2025/2
Y1 - 2025/2
N2 - Background: This study determines the prognostic value of the luminal-like subtype in patients with hormone receptor-positive breast cancer and explores whether the efficacy of extended anastrozole therapy differs between patients with luminal A-like versus luminal B-like tumours. Materials and methods: The phase III DATA study (NCT00301457) examined the efficacy of 6 versus 3 years of anastrozole in postmenopausal women with early-stage hormone receptor-positive breast cancer who had received 2-3 years of tamoxifen. Patients with available formalin-fixed paraffin-embedded tissue blocks were identified and classified by immunohistochemical luminal-like subtype. Distant recurrence (DR) and breast cancer-specific mortality (BCSM) were compared by luminal-like subtype and treatment arm using competing risk methods. Results: This study included 788 patients: 491 had a luminal A-like tumour and 297 had a luminal B-like tumour. The median follow-up time was 13.1 years. Patients with luminal B-like tumours experienced a higher risk of DR [subdistribution hazard ratio (sHR) 1.44, 95% confidence interval (CI) 1.03-2.01, P = 0.03] and BCSM (sHR 1.68, 95% CI 1.15-2.45, P = 0.008) than patients with luminal A-like tumours. The efficacy of extended anastrozole therapy differed between patients with luminal A-like tumours (DR: sHR 0.51, 95% CI 0.30-0.88, P = 0.02; BCSM: sHR 0.39, 95% CI 0.19-0.82, P = 0.01) and patients with luminal B-like tumours (DR: sHR 2.09, 95% CI 0.96-4.53, P = 0.06; BCSM: sHR 2.36, 95% CI 0.80-7.00, P = 0.12) (P-interaction = 0.03 and P-interaction = 0.06, respectively). Conclusion: In patients with hormone receptor-positive breast cancer, the luminal B-like subtype was associated with a significantly worse prognosis when compared with the luminal A-like subtype. Extended anastrozole therapy halved the risk of DR and BCSM in patients with luminal A-like tumours, whereas no effect was seen in patients with luminal B-like tumours.
AB - Background: This study determines the prognostic value of the luminal-like subtype in patients with hormone receptor-positive breast cancer and explores whether the efficacy of extended anastrozole therapy differs between patients with luminal A-like versus luminal B-like tumours. Materials and methods: The phase III DATA study (NCT00301457) examined the efficacy of 6 versus 3 years of anastrozole in postmenopausal women with early-stage hormone receptor-positive breast cancer who had received 2-3 years of tamoxifen. Patients with available formalin-fixed paraffin-embedded tissue blocks were identified and classified by immunohistochemical luminal-like subtype. Distant recurrence (DR) and breast cancer-specific mortality (BCSM) were compared by luminal-like subtype and treatment arm using competing risk methods. Results: This study included 788 patients: 491 had a luminal A-like tumour and 297 had a luminal B-like tumour. The median follow-up time was 13.1 years. Patients with luminal B-like tumours experienced a higher risk of DR [subdistribution hazard ratio (sHR) 1.44, 95% confidence interval (CI) 1.03-2.01, P = 0.03] and BCSM (sHR 1.68, 95% CI 1.15-2.45, P = 0.008) than patients with luminal A-like tumours. The efficacy of extended anastrozole therapy differed between patients with luminal A-like tumours (DR: sHR 0.51, 95% CI 0.30-0.88, P = 0.02; BCSM: sHR 0.39, 95% CI 0.19-0.82, P = 0.01) and patients with luminal B-like tumours (DR: sHR 2.09, 95% CI 0.96-4.53, P = 0.06; BCSM: sHR 2.36, 95% CI 0.80-7.00, P = 0.12) (P-interaction = 0.03 and P-interaction = 0.06, respectively). Conclusion: In patients with hormone receptor-positive breast cancer, the luminal B-like subtype was associated with a significantly worse prognosis when compared with the luminal A-like subtype. Extended anastrozole therapy halved the risk of DR and BCSM in patients with luminal A-like tumours, whereas no effect was seen in patients with luminal B-like tumours.
KW - aromatase inhibitors
KW - breast neoplasms
KW - Ki-67 antigen
KW - luminal-like subtype
KW - prognosis
UR - http://www.scopus.com/inward/record.url?scp=85217030420&partnerID=8YFLogxK
U2 - 10.1016/j.esmoop.2025.104154
DO - 10.1016/j.esmoop.2025.104154
M3 - Article
AN - SCOPUS:85217030420
SN - 2059-7029
VL - 10
JO - ESMO open
JF - ESMO open
IS - 2
M1 - 104154
ER -