Version 1
: Received: 22 May 2021 / Approved: 24 May 2021 / Online: 24 May 2021 (09:23:50 CEST)
How to cite:
Amin, M.; Sharif, S.; Asghar, W.; Sadaf, H.; Sarfraz, A.; Sarfraz, Z.; Cherrez-Ojeda, I. Atezolizumab and Pembrolizumab in Triple-Negative Breast Cancer: A Meta-Analysis. Preprints2021, 2021050546. https://doi.org/10.20944/preprints202105.0546.v1
Amin, M.; Sharif, S.; Asghar, W.; Sadaf, H.; Sarfraz, A.; Sarfraz, Z.; Cherrez-Ojeda, I. Atezolizumab and Pembrolizumab in Triple-Negative Breast Cancer: A Meta-Analysis. Preprints 2021, 2021050546. https://doi.org/10.20944/preprints202105.0546.v1
Amin, M.; Sharif, S.; Asghar, W.; Sadaf, H.; Sarfraz, A.; Sarfraz, Z.; Cherrez-Ojeda, I. Atezolizumab and Pembrolizumab in Triple-Negative Breast Cancer: A Meta-Analysis. Preprints2021, 2021050546. https://doi.org/10.20944/preprints202105.0546.v1
APA Style
Amin, M., Sharif, S., Asghar, W., Sadaf, H., Sarfraz, A., Sarfraz, Z., & Cherrez-Ojeda, I. (2021). Atezolizumab and Pembrolizumab in Triple-Negative Breast Cancer: A Meta-Analysis. Preprints. https://doi.org/10.20944/preprints202105.0546.v1
Chicago/Turabian Style
Amin, M., Zouina Sarfraz and Ivan Cherrez-Ojeda. 2021 "Atezolizumab and Pembrolizumab in Triple-Negative Breast Cancer: A Meta-Analysis" Preprints. https://doi.org/10.20944/preprints202105.0546.v1
Abstract
Triple negative breast cancer (TNBC) has a higher mRNA expression of programmed cell death ligand 1 (PD-L1) which is a ligand to programmed cell death protein 1 (PD-1). The binding of the ligand leads to suppressed activity of T-cell-mediated immune response against cancer cells. The approval of anti-PD-L1 drugs including pembrolizumab and atezolizumab in subgroups of TNBC offer potential improvement to the current treatment regimens available for TNBC. We conducted a meta-analysis to review the efficacy of pembrolizumab and atezolizumab for the treatment of TNBC in both adjuvant and neo-adjuvant settings. A systematic strategy was used as per the PRISMA 2020 statement. All statistical analyses were conducted using Review Manager 5.4. Outcome measures included objective response rate, progression free survival, overall survival in adjuvant therapy groups, and pathological complete response rates in neoadjuvant groups. Six clinical trials were included. For adjuvant therapies, the ORR (OR=1.26, P = 0.04) of Atezolizumab/Pembrolizumab plus chemotherapy was higher in intention to treat (ITT) arms than the placebo groups in TNBC. A positive effect size was found for PFS in the ITT arms (Cohen’s d = 1.55, P<0.001). The Atezolizumab plus chemotherapy group had a positive effect size for OS compared to the control groups (Cohen’s d = 0.52, P<0.001). In the neo-adjuvant setting, patients in ITT arms had higher pCR rates as compared to the control groups (OR= 1.61, P = 0.001). Our findings collate evidence of pembrolizumab and atezolizumab as a viable treatment option among patients with TNBC with PDL1+ subgroups deriving benefits.
Keywords
triple negative breast cancer; Pembrolizumab; Atezolizumab; chemotherapy; anti-PD-L1; biomarkers; targeted therapies; development of novel drugs
Subject
Medicine and Pharmacology, Oncology and Oncogenics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
