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Current Cancer Drug Targets

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ISSN (Print): 1568-0096
ISSN (Online): 1873-5576

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Systematic Review Article

Efficacy and Safety of Phosphatidylinositol 3-kinase Inhibitors for Patients with Breast Cancer: A Systematic Review and Meta-analysis of Randomized Controlled Trials

Author(s): Yi Wang, Xianling Du, Hongqiang Xin and Ruimin Xu*

Volume 24, Issue 9, 2024

Published on: 24 January, 2024

Page: [941 - 951] Pages: 11

DOI: 10.2174/0115680096266181231207110048

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Abstract

Background: Phosphatidylinositol 3-kinase (PI3K) inhibitors belong to the class of drugs that inhibit the activity of the PI3K protein, which is commonly overexpressed in breast cancer cells. However, there is a need to summarize the evidence to provide conclusive advice on the benefit of PI3K inhibitors in breast cancer patients. Therefore, this review assessed the effectiveness and safety of the PI3K inhibitors amongst breast cancer patients.

Methods: Searches were made in PubMed Central, EMBASE, MEDLINE, SCOPUS, CENTRAL, WHO trial registry and Clinicaltrials.gov up to December 2022. Meta-analysis was executed using the random-effects model. Pooled hazard ratio (HR)/risk ratio (RR) was reported with 95% confidence intervals (CIs).

Results: In total, 13 studies were included in the analysis. Most were multi-country studies and had a higher risk of bias. Regarding the efficacy parameters, pooled HR for progression-free survival was 0.79 (95%CI: 0.67-0.92), pooled RR for complete response was 1.54 [95%CI: 1.14 to 2.09], partial response was 1.18 [95%CI: 0.87-1.61], overall response was 1.20 [95%CI: 0.93-1.56], stable disease was 1.09 [95%CI: 0.78-1.53], progressive disease was 0.80 [95%CI: 0.74 to 0.87], and clinical benefit was 1.08 [95%CI: 0.80-1.49]. For safety parameters, pooled RR for hyperglycemia was 4.57 [95%CI: 3.15-6.62], and gastrointestinal toxicity was 1.82 [95%CI: 1.56 to 2.14].

Conclusion: PI3K inhibitors had better efficacy than the present standard of concern for patients with breast cancer, especially among patients with PIK3CA mutations. Hence, clinicians and oncologists can provide this drug for the target population with extra caution for diabetes patients.

Keywords: Breast cancer, meta-analysis, phosphatidylinositol 3-kinase inhibitors, systematic review, overall survival, progression free survival.

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