Response-guided neoadjuvant sacituzumab govitecan for localized triple-negative breast cancer : results from the NeoSTAR trial

Copyright © 2023. Published by Elsevier Ltd..

BACKGROUND: Sacituzumab govitecan (SG), a novel antibody-drug conjugate (ADC) targeting TROP2, is approved for pre-treated metastatic triple-negative breast cancer (mTNBC). We conducted an investigator-initiated clinical trial evaluating neoadjuvant (NA) SG (NCT04230109), and report primary results.

PATIENTS AND METHODS: Participants with early-stage TNBC received NA SG for four cycles. The primary objective was to assess pathological complete response (pCR) rate in breast and lymph nodes (ypT0/isN0) to SG. Secondary objectives included overall response rate (ORR), safety, event-free survival (EFS), and predictive biomarkers. A response-guided approach was utilized, and subsequent systemic therapy decisions were at the discretion of the treating physician.

RESULTS: From July 2020 to August 2021, 50 participants were enrolled (median age = 48.5 years; 13 clinical stage I disease, 26 stage II, 11 stage III). Forty-nine (98%) completed four cycles of SG. Overall, the pCR rate with SG alone was 30% [n = 15, 95% confidence interval (CI) 18% to 45%]. The ORR per RECIST V1.1 after SG alone was 64% (n = 32/50, 95% CI 77% to 98%). Higher Ki-67 and tumor-infiltrating lymphocytes (TILs) were predictive of pCR to SG (P = 0.007 for Ki-67 and 0.002 for TILs), while baseline TROP2 expression was not (P = 0.440). Common adverse events were nausea (82%), fatigue (76%), alopecia (76%), neutropenia (44%), and rash (48%). With a median follow-up time of 18.9 months (95% CI 16.3-21.9 months), the 2-year EFS for all participants was 95%. Among participants with a pCR with SG (n = 15), the 2-year EFS was 100%.

CONCLUSIONS: In the first NA trial with an ADC in localized TNBC, SG demonstrated single-agent efficacy and feasibility of response-guided escalation/de-escalation. Further research on optimal duration of SG as well as NA combination strategies, including immunotherapy, are needed.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:35

Enthalten in:

Annals of oncology : official journal of the European Society for Medical Oncology - 35(2024), 3 vom: 01. Feb., Seite 293-301

Sprache:

Englisch

Beteiligte Personen:

Spring, L M [VerfasserIn]
Tolaney, S M [VerfasserIn]
Fell, G [VerfasserIn]
Bossuyt, V [VerfasserIn]
Abelman, R O [VerfasserIn]
Wu, B [VerfasserIn]
Maheswaran, S [VerfasserIn]
Trippa, L [VerfasserIn]
Comander, A [VerfasserIn]
Mulvey, T [VerfasserIn]
McLaughlin, S [VerfasserIn]
Ryan, P [VerfasserIn]
Ryan, L [VerfasserIn]
Abraham, E [VerfasserIn]
Rosenstock, A [VerfasserIn]
Garrido-Castro, A C [VerfasserIn]
Lynce, F [VerfasserIn]
Moy, B [VerfasserIn]
Isakoff, S J [VerfasserIn]
Tung, N [VerfasserIn]
Mittendorf, E A [VerfasserIn]
Ellisen, L W [VerfasserIn]
Bardia, A [VerfasserIn]

Links:

Volltext

Themen:

ADC
Antibodies, Monoclonal, Humanized
Antigens, Neoplasm
Camptothecin
Immunoconjugates
Journal Article
Ki-67 Antigen
M9BYU8XDQ6
Neoadjuvant
Sacituzumab govitecan
TROP2
Triple-negative breast cancer
XT3Z54Z28A

Anmerkungen:

Date Completed 26.02.2024

Date Revised 26.02.2024

published: Print-Electronic

ClinicalTrials.gov: NCT04230109

Citation Status MEDLINE

doi:

10.1016/j.annonc.2023.11.018

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM365829331