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    Home > Active Ingredient News > Antitumor Therapy > Eur J Cancer: Efficacy and safety of the combination of pabocinil, pembrolizumab and letrozole in the treatment of HR+ metastatic breast cancer

    Eur J Cancer: Efficacy and safety of the combination of pabocinil, pembrolizumab and letrozole in the treatment of HR+ metastatic breast cancer

    • Last Update: 2021-08-02
    • Source: Internet
    • Author: User
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    CDK4/6 inhibitors (CDK4/6i) can prevent the transition of the cell cycle from G1 to S phase and show promise in overcoming endocrine resistance


    Breast cancer

    CDK4/6 inhibitors can regulate the immune response of breast cancer


    Immunization Eur J Cancer Eur J Cancer

    Patients with stage IV HR+HER2-metastatic breast cancer were recruited and treated with pabocinil, pembrolizumab, and letrozole


    From November 2016 to July 2020, a total of 23 patients were recruited, of which 20 were available for reactivity assessment, of which 4 were in cohort 1 and 16 were in cohort 2


    Grade 3-4 adverse reactions are neutropenia (83%), leukopenia (65%), thrombocytopenia (17%) and elevated liver enzymes (17%)


    Grade 3-4 adverse reactions are neutropenia (83%), leukopenia (65%), thrombocytopenia (17%) and elevated liver enzymes (17%)


    PFS and OS in 2 cohorts

    PFS and OS in 2 cohorts

    In cohort 1, 50% of patients achieved partial remission (PR), and 50% of patients had stable disease (SD)


    In the 2 cohorts, 31% of patients achieved complete remission (CR), 25% of patients achieved PR, and 31% of patients achieved SD

    In summary, the combination of Pabocinib , pembrolizumab, and letrozole is well tolerated in patients with HR+ metastatic breast cancer, and the complete remission rate can be as high as 31%


    The combined regimen of Pabocinil, Pembrolizumab and Letrozole is well tolerated in patients with HR+ metastatic breast cancer, and the complete remission rate can be as high as 31%.


    Original source:

    Yuan Yuan,Lee Jin Sun,Yost Susan E et al.


    Phase I / II trial of palbociclib, pembrolizumab? And letrozole in patients with hormone receptor-positive metastatic breast cancer

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