Idera Pharmaceuticals Presents ILLUMINATE-101 Data Demonstrating Tilsotolimod Activates Innate and Adaptive Immunity as Monotherapy in Patients with Refractory Solid Tumors at the American Association for Cancer Research (AACR) 2019 Annual Meeting
In the poster presentation entitled, “Activation of Innate and Adaptive Immunity Using Intratumoral Tilsotolimod (IMO-2125) as Monotherapy in Patients with Refractory Solid Tumors: a Phase 1b Study (ILLUMINATE-101)” (abstract number 4062), Hani Babiker, M.D., Assistant Professor of Medicine and Associate Director of the Phase 1 Program at the
“Tilsotolimod’s therapeutic mission is to alter the immune conditions within the tumor microenvironment to help provide more favorable conditions for checkpoint inhibitors to help achieve successful outcomes for patients,” stated Dr. Babiker. “We typically would not expect to see substantial tumor reduction with tilsotolimod monotherapy; however, it is highly encouraging to see the number and duration of stable diseases, including some with tumor reductions, from this study across a wide spectrum of difficult-to-treat refractory solid tumor types. The finding from this study bodes well for both the ILLUMINATE-301 Phase 3 trial and the upcoming ILLUMINATE-206 trial of tilsotolimod in combination with ipilimumab and nivolumab in multiple planned tumor types, including those that have not responded favorably to immunotherapy to date.”
The poster will be presented on
In the ILLUMINATE-101 study, patients with histologically or cytologically confirmed diagnosis of metastatic refractory solid tumors were enrolled into 4 ascending dose cohorts to receive tilsotolimod (8mg, 16mg, 23mg and 32mg) injected into a single lesion. Tumor biopsies of injected and distant lesions were obtained at baseline and at 24 hours and 6 weeks after commencing treatment.
- No dose limiting toxicities or treatment-related adverse events were observed;
- No treatment-emergent adverse events (TEAEs) leading to treatment or study discontinuation or death occurred; and
- The most common grade 3/4 TEAEs were anemia, hyponatremia, pain, sepsis (n=3 each), fatigue and thrombocytopenia (n=2 each).
- Of 29 evaluable patients, 13 (45%) had a RECIST v1.1 disease assessment of stable disease (SD), with a disease control rate of 45%;
- Of the 13 patients with SD, 5 (38%) had maximum tumor shrinkage >10% below baseline;
- Duration of SD ranged from 1.3 to 9.7+ months from start of treatment, with 3 patients ongoing; and
- No correlations between dose and efficacy were observed.
- Fresh flow cytometry in 2 of 3 analyzed patients showed HLA-DR (MHC Class II) upregulation at 24 hours compared with pre-treatment; and
- Robust activation and upregulation of type I IFN pathway was observed across analyzed tumor types, demonstrated by increased IRF7, IFIT1, and IFIT2 gene expression, and early increases in type I IFN signaling.
“The findings from ILLUMINATE-101 further strengthen the body of clinical evidence showing that tilsotolimod alters the immune landscape within the tumor microenvironment, setting the stage for potentially higher response rates when combined with other immune-oncology agents,” stated
A copy of the poster presentation is available on Idera’s corporate website at http://www.iderapharma.com/our-approach/key-publications/.
About Tilsotolimod (IMO-2125)
Tilsotolimod is a TLR 9 agonist that received Fast Track Designation from the
Harnessing the approach of the earliest researchers in immunotherapy and the company’s vast experience in developing proprietary immunology platforms, Idera’s lead development program is focused on priming the immune system to play a more powerful role in fighting cancer, ultimately increasing the number of people who can benefit from immunotherapy.
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