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    Association details:
    Biomarker:TSC2 C1450G
    Cancer:HER2 Positive Breast Cancer
    Drug:Ibrance (palbociclib) (CDK4/6 inhibitor) +
    lapatinib (EGFR inhibitor, HER2 inhibitor)
    Direction:Sensitive
    Evidence:
    Evidence Level:
    Sensitive: D – Preclinical
    Source:
    NPJ Breast Cancer
    Title:

    Resistance to anti-HER2 therapy associated with the TSC2 nonsynonymous variant c.4349 C > G (p.Pro1450Arg) is reversed by CDK4/6 inhibitor in HER2-positive breast cancer

    Published date:
    05/09/2023
    Excerpt:
    In in vitro and xenograft models, palbociclib+lapatinib shows higher anti-tumor activity than monotherapy and overcomes the resistance of the TSC2 c.4349 C > G-related variant to anti-HER2 therapy. We reveal a new mechanism of resistance to anti-HER2 therapy and provide a strategy to increase the efficiency of anti-HER2 therapy in HER2-positive breast cancer.
    DOI:
    https://doi.org/10.1038/s41523-023-00542-1