TEST:

Guardant360 Response™

P1/2; The following biomarkers were associated with better outcomes for patients treated with T-DM1 + neratinib: (1) ctHER2-amp (C1D1) or in TP1; (2) Molecular Response scores; (3) loss of detectable ctDNA; (4) RNA levels of HER2; and (5) on-treatment loss of detectable ctHER2-amp. HER2 transcriptional and IHC/FISH status identify HER2-low cases (IHC 1+ or IHC 2+ and FISH negative) in these heavily anti-HER2 treated patients. Due to the small number of patients and samples in this study, the associations we have shown are for hypothesis generation only and remain to be validated in future studies. Clinical Trials registration NCT02236000.

"Zydus Lifesciences and Guardant Health have agreed to jointly promote the Guardant360 portfolio of liquid and tissue biopsy tests across India and Nepal...The tests to be promoted include the Guardant360 and Guardant360 TissueNext tests for genomic profiling and the Guardant360 Response test for monitoring response to treatment..."

"Guardant Health, Inc...announced today that Palmetto GBA, a Medicare administrative contractor for the Molecular Diagnostics Services program (MolDX), has conveyed coverage for the Guardant360 Response test....Following this decision, the Guardant360 Response test is now covered for fee-for-service Medicare patients in the U.S. with metastatic or inoperable solid tumors who are on an immune checkpoint inhibitor therapy. The coverage includes a Guardant360 CDx or LDT test before initiating therapy to establish a ctDNA baseline and a Guardant360 Response test 4 to 10 weeks after the therapy has been initiated to measure the change in ctDNA level."

These data demonstrate a statistically significant interaction between baseline ctDNA level and treatment-induced ctDNA level change in association with RW clinical outcomes. This facilitates the development of patient-based models incorporating baseline ctDNA level with ctDNA molecular response for association with RW clinical outcomes.

J.P. Morgan 41st Annual Healthcare Conference Presentation