Cancer Science
Elucidating PI3K / AKT / PTEN Pathway Alterations at Single‐Cell Level in CTCs From HR +/ HER2 − Metastatic Breast Cancer
ABSTRACT Alterations in the PI3K signaling pathway are common in hormone receptor‐positive (HR+)/HER2‐negative metastatic breast cancer (MBC) and are associated with response to PI3K and AKT inhibitor‐targeted therapies. When metastasis biopsy is unavailable for genetic testing, circulating tumor DNA (ctDNA) analysis is an alternative strategy for tumor genotyping, but it is less sensitive for gain and loss analysis. Here, we assess molecular alterations of the genes of this axis— PIK3CA , AKT1 , and PTEN —in circu …