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Real‑world evaluation of the efficacy of immune checkpoint inhibitors in the treatment of metastatic breast cancer

  • Authors:
    • Xiaoyan Qian
    • Yunxia Tao
    • Haizhu Chen
    • Xin Li
    • Yaqin Wang
    • Xiaoming Xu
    • Shuo Li
    • Haoyu Chen
    • Shundong Cang
    • Yang Liu
  • View Affiliations / Copyright

    Affiliations: Department of Oncology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan 450001, P.R. China, Department of Oncology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221000, P.R. China, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Medical Oncology, Breast Tumor Centre, Phase I Clinical Trial Centre, Sun Yat‑sen Memorial Hospital, Sun Yat‑sen University, Guangzhou, Guangdong 518107, P.R. China, Department of Medical Records, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan 450001, P.R. China, Department of Pharmacy, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan 450001, P.R. China, Department of Medical Records, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital and Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, Guangdong 518116, P.R. China, Shenzhen MoZhou Tech Co., Ltd., Shenzhen, Guangdong 518057, P.R. China, Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital and Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, Guangdong 518116, P.R. China
    Copyright: © Qian et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY 4.0].
  • Article Number: 29
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    Published online on: October 25, 2024
       https://doi.org/10.3892/ol.2024.14775
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Abstract

The present study aimed to assess the efficacy and safety of immune checkpoint inhibitor (ICI)‑based therapy in patients with metastatic breast cancer (MBC). Therefore, eligible patients with histologically confirmed MBC, treated with ICI‑based therapy, were enrolled. The primary endpoint was progression‑free survival (PFS) and the secondary endpoints included objective response rate (ORR), disease control rate (DCR), overall survival (OS) and safety. A total of 90 patients with MBC, treated with ICI‑based therapy, with different treatment lines, were included in the present study. The median age was 50 years (range, 27‑76). The predominant tumor subtypes were triple negative (53.3%) and luminal (31.1%) breast cancer. The majority of patients (61.1%) were heavily pretreated (lines of treatment, ≥3). Approximately half of the patients (46.7%) had ≥3 metastatic sites. The overall ORR was 36.7% (33/90 patients), while a DCR of 78.9% (71/90 patients) was also recorded. With a median follow‑up of 16.0 months, the median PFS and OS were 4.9 months [95% confidence interval (CI), 3.8‑6.1] and 13.9 months (95% CI, 9.5‑18.2), respectively. Patients treated with ICIs as first‑line therapy exhibited notable improvement, with a median PFS of 11.0 months (95% CI, 6.0‑16.0) and a median OS of 24.3 months (95% CI, 11.4‑37.2). In addition, the pretreatment blood platelet‑to‑lymphocyte ratio was an independent risk factor for PFS [hazard ratio (HR)=2.406; 95% CI, 1.325‑4.370; P=0.004] and OS (HR=2.376; 95% CI, 1.059‑5.328; P=0.036). The most common adverse events were nausea (44.4%), neutropenia (42.0%) and alanine aminotransferase/aspartate aminotransferase elevation (22.2%). Furthermore, three (3.3%) patients developed grade 1/2 immuno‑related toxicity and recovered after supportive care. Overall, the present study suggested that the ICI‑based therapy exhibited encouraging clinical outcomes with manageable toxicity in patients with MBC in real‑world settings, with the most favorable efficacy in first‑line treatment.
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Copy and paste a formatted citation
Spandidos Publications style
Qian X, Tao Y, Chen H, Li X, Wang Y, Xu X, Li S, Chen H, Cang S, Liu Y, Liu Y, et al: Real‑world evaluation of the efficacy of immune checkpoint inhibitors in the treatment of metastatic breast cancer. Oncol Lett 29: 29, 2025.
APA
Qian, X., Tao, Y., Chen, H., Li, X., Wang, Y., Xu, X. ... Liu, Y. (2025). Real‑world evaluation of the efficacy of immune checkpoint inhibitors in the treatment of metastatic breast cancer. Oncology Letters, 29, 29. https://doi.org/10.3892/ol.2024.14775
MLA
Qian, X., Tao, Y., Chen, H., Li, X., Wang, Y., Xu, X., Li, S., Chen, H., Cang, S., Liu, Y."Real‑world evaluation of the efficacy of immune checkpoint inhibitors in the treatment of metastatic breast cancer". Oncology Letters 29.1 (2025): 29.
Chicago
Qian, X., Tao, Y., Chen, H., Li, X., Wang, Y., Xu, X., Li, S., Chen, H., Cang, S., Liu, Y."Real‑world evaluation of the efficacy of immune checkpoint inhibitors in the treatment of metastatic breast cancer". Oncology Letters 29, no. 1 (2025): 29. https://doi.org/10.3892/ol.2024.14775
Copy and paste a formatted citation
x
Spandidos Publications style
Qian X, Tao Y, Chen H, Li X, Wang Y, Xu X, Li S, Chen H, Cang S, Liu Y, Liu Y, et al: Real‑world evaluation of the efficacy of immune checkpoint inhibitors in the treatment of metastatic breast cancer. Oncol Lett 29: 29, 2025.
APA
Qian, X., Tao, Y., Chen, H., Li, X., Wang, Y., Xu, X. ... Liu, Y. (2025). Real‑world evaluation of the efficacy of immune checkpoint inhibitors in the treatment of metastatic breast cancer. Oncology Letters, 29, 29. https://doi.org/10.3892/ol.2024.14775
MLA
Qian, X., Tao, Y., Chen, H., Li, X., Wang, Y., Xu, X., Li, S., Chen, H., Cang, S., Liu, Y."Real‑world evaluation of the efficacy of immune checkpoint inhibitors in the treatment of metastatic breast cancer". Oncology Letters 29.1 (2025): 29.
Chicago
Qian, X., Tao, Y., Chen, H., Li, X., Wang, Y., Xu, X., Li, S., Chen, H., Cang, S., Liu, Y."Real‑world evaluation of the efficacy of immune checkpoint inhibitors in the treatment of metastatic breast cancer". Oncology Letters 29, no. 1 (2025): 29. https://doi.org/10.3892/ol.2024.14775
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