Encouraging Updated Data from Phase 2 MARIO-3 TNBC Trial Presented at 2021 San Antonio Breast Cancer Symposium
-88.6% of Evaluable 1L TNBC Patients Achieved Tumor Reduction-
-Disease Control Rate of 92.8% and 81.4% of Evaluable Patients with PD-L1 Positive and PD-L1 Negative Tumors, Respectively-
-Median PFS Improvement of 47% and 30% Compared to IMpassion130 Benchmark for Patients with PD-L1 Positive and PD-L1 Negative Tumors, Respectively-
- Safety Consistent with Expectations for the Three Component Drugs with No New Safety Signals -
-Investor Event with KOL Scheduled for Today,
“These promising updated data suggest that the addition of eganelisib to atezolizumab and nab-paclitaxel has the potential to provide improved patient outcomes over benchmark IMpassion130 data in front-line metastatic TNBC,” said
MARIO-3 Key Data Updates:
This data update includes 50 patients enrolled and 44 evaluable as of the
October 2, 2021data cutoff date, with a median duration of follow up of 9.9 months.
- Of evaluable patients, tumor reduction was observed in 92.8% of patients with PD-L1 positive tumors (13/14) and 85.2% of patients with PD-L1 negative tumors (22/27).
Disease control rate (DCR)
- 92.8% (13/14) DCR in patients with PD-L1 positive tumors: CR 14.3% (2/14), PR 57.1% (8/14), SD 21.4% (3/14)
- 81.4% (22/27) DCR in patients with PD-L1 negative tumors: complete response (CR) 0% (0/27), partial response (PR) 48.1% (13/27), stable disease (SD) 33.3% (9/27)
Progression free survival (PFS)
- In patients with PD-L1(+) tumors, median PFS in MARIO-3 was 11.0 months, a 47% improvement in mPFS compared to the 7.5 months reported for atezolizumab and nab-paclitaxel alone in IMpassion130
- In patients with PD-L1(-) tumors, median PFS in MARIO-3 was 7.3 months, a 30% improvement compared to the 5.6 months reported for atezolizumab and nab-paclitaxel alone in IMpassion130
72% of the 32 PD-L1 (+) and PD-L1(-) patients treated since the
June 26, 2021data cut remain on treatment
- 67% of the PD-L1(-) patients who reached the median PFS of 7.3 months remain on treatment
- MARIO-3 did not demonstrate any new safety signals compared to benchmark trials, and its safety profile was consistent with expectations for the three component drugs. The most common Grade 3 or higher treatment-related TEAEs were hepatic AEs (18%); neutropenia AEs (16%); skin AEs (12%); fatigue, diarrhea and peripheral sensory neuropathy (6% each); and vomiting and weight decreased (2% each). Seven patients (14%) discontinued treatment for treatment-related TEAEs and nine patients (18%) had treatment-related SAEs.
- Quantification across 11 paired tumor biopsies shows increased immune activation and decreased immune suppression including an increase in CD8+ T cells, activated T cells, and anti-tumor M1 macrophages and a decrease in tumor cells and pro-tumor M2 macrophages resulting in an increase in the M1:M2 ratio.
- Paired tumor biopsy data show 5 of 8 patients with PD-L1(-) tumors converting to PD-L1(+) two months after treatment utilizing the same 1% PD-L1 cutoff standard used in the benchmark IMpassion130 study. PD-L1 expression also increased in the three patients with PD-L1(+) tumors who started the study above the 1% cutoff. None of the patients converting to PD-L1(+) or patients with PD-L1(+) tumors who experienced increased PD-L1 expression had disease progression.
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About Infinity and Eganelisib
Cautionary Note Regarding Forward-Looking Statements
This press release contains forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. Such forward-looking statements include those regarding: the therapeutic potential of eganelisib, including potential clinical benefit and potential to become an important treatment option; plans to present data; and the Company's ability to execute on its strategic plans. Such statements are subject to numerous important factors, risks and uncertainties that may cause actual events or results to differ materially from the Company's current expectations. For example, there can be no guarantee that eganelisib will successfully complete necessary preclinical and clinical development phases. Further, there can be no guarantee that any positive developments in Infinity's product portfolio will result in stock price appreciation. Management's expectations and, therefore, any forward-looking statements in this press release could also be affected by risks and uncertainties relating to a number of other factors, including the following: results of clinical trials and preclinical studies, including subsequent analysis of existing data and new data received from ongoing and future studies; the cost, timing and results of clinical trials and other development activities that may be delayed or disrupted by the COVID-19 pandemic or otherwise; the content and timing of decisions made by the
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