Expert Interview
Examining the Phase III evERA Breast Cancer Study Results for Giredestrant in ER-Positive, HER2-Negative Advanced Breast Cancer from Genentech (RHHBY)
Ticker(s): RHHBYAn oncologist specializing in breast cancer, particularly hormone receptor–positive, HER2-negative subtypes. The expert should have experience with endocrine therapy resistance, familiarity with CDK4/6 inhibitor sequencing, and insights into the evolving therapeutic landscape of oral SERDs and combination regimens in metastatic settings.
The evERA trial met both co-primary endpoints, showing statistically significant and clinically meaningful improvements in progression-free survival in both the overall and ESR1-mutated populations. How do you interpret the magnitude of these benefits, and what does this mean for patients progressing after CDK4/6 inhibition?
Added By: slingshot_insightsGiven that Giredestrant acts as both an estrogen receptor antagonist and degrader, how might its dual mechanism provide an advantage over traditional endocrine therapies, particularly in tumors with ESR1 mutations or endocrine resistance?
Added By: slingshot_insightsThe evERA study tested Giredestrant in combination with everolimus, an mTOR inhibitor. What are the clinical and biological rationales for this combination, and how might it reshape the post-CDK4/6 standard of care compared to current endocrine therapy plus everolimus regimens?
Added By: slingshot_insightsThe improvement in progression-free survival among patients with ESR1 mutations was a key outcome in evERA. How do you contextualize this result against emerging oral SERDs in the same space, and could ESR1 status soon guide more routine treatment selection in clinical practice?
Added By: slingshot_insightsWith multiple oral SERDs now in late-stage development, what differentiates Giredestrant based on the data from evERA? Are there any specific efficacy or tolerability advantages that could position it as a preferred agent in the evolving endocrine therapy sequence?
Added By: slingshot_insightsSafety and tolerability are critical considerations in the chronic management of advanced ER-positive breast cancer. What have we learned from evERA about the safety profile of Giredestrant plus everolimus, and how does it compare to existing treatment backbones?
Added By: slingshot_insightsAs oncologists increasingly face patients who have progressed on CDK4/6 inhibitors, how might evERA’s results influence treatment sequencing strategies? Do these data suggest that SERD-based regimens could become a more prominent second-line option?
Added By: slingshot_insightsGiredestrant is also being evaluated in other combinations, such as with PI3K inhibitors like inavolisib. How important are these ongoing studies in defining Giredestrant’s full therapeutic potential across treatment lines, and do you foresee a move toward personalized combination strategies guided by tumor biologyy?
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