Monday, November 12, 2018 - 07:00
  • These data support the advancement of the clinical program, starting with the enrollment of an additional cohort of patients who received both prior platinum-based chemotherapy and PD-1/L1 inhibitors (“IO-pretreated”)
  • An oral presentation took place on Sunday, November 11, at the SITC 2018 Annual Meeting in Washington, D.C., USA, by Professor Roger B. Cohen, Prof. of Medicine at the Hospital of the University of Pennsylvania and Principal Investigator of the study

 

Innate Pharma SA (the “Company” - Euronext Paris: FR0010331421 – IPH), today announced exploratory subgroup analyses and preliminary translational data from the Phase II trial evaluating the combination of monalizumab and cetuximab (anti-EGFR) in previously treated patients with recurrent and/or metastatic squamous cell carcinoma of the head & neck (R/M SCCHN). Monalizumab is a first-in-class checkpoint inhibitor targeting NKG2A inhibitory receptors expressed on tumor-infiltrating cytotoxic CD8 T lymphocytes and NK cells.

The subgroup analysis revealed very interesting durable responses in both IO-naïve and IO-pretreated patients,” commented Pierre Dodion, Chief Medical Officer of Innate Pharma. “Patients who have failed on IO-therapy currently have no other treatment option. The fact that they appear to benefit with prolonged survival is rather remarkable and prompted us to advance our clinical program. Discussions are taking place in parallel with regards to the next steps in IO naïve patients”.

“The high disease control rate that we observed in this study along with the favorable trends in progression-free and overall survival, including a preliminary estimate of median overall survival of 10.3 months, are very encouraging,” commented Professor Roger B. Cohen, Principal Investigator of the study. “We also saw evidence of clinical activity in both IO-naive and IO-pretreated patients. If confirmed, these data would provide support for a highly novel immunotherapeutic combination with a unique mechanism of action for the treatment of patients with head & neck cancer.”

Data from the cohort of 40 patients were reported at 2018 ESMO congress in October. Exploratory subgroup analysis revealed encouraging responses, durability of response, PFS and OS in IO-naïve and IO-pretreated patients.

 

Cut-off August 31, 2018

All patients

(n=40)

IO-naïve

(n=23)

IO-pretreated

(n=17)

ORR [95% CI]

27.5% [16-43]

35% [19-55]

18% [6-41]

Median PFS [95% CI]

5.0 m [3.7-6.9]

4.0 m[3.7-10.6]

5.0 m [3.5-NR]

Median OS [95% CI]

10.3 m [7.3-NR]

10.3 m [7.2-NR]

12.8 m [6.0-NR]

DCR 24 weeks

35% [22-51]

39% [22-59]

29% [13-53]

Median time to response [range]

1.6 m [1.5-3.9]

1.7 m [1.5-3.9]

1.6 m [1.6-3.1]

Median duration of response [95% CI]

5.6 m [3.8-NR]

5.3 m [3.8-NR]

5.6 m [3.7-NR]

 

Eric Vivier, Chief Scientific Officer of Innate Pharma, said:We are combining the use of state-of-the-art technologies including high-dimensional flow cytometry, single cell RNA seq and computational pathology, to monitor the immune response in patients. Data support the mode of action of monalizumab as unleashing a multilayered immune response involving both NK and T cells. As such, monalizumab appears as a first-in-class second generation immune checkpoint inhibitor with a large spectrum of immune targets. He added: “While preliminary, translational results suggest that the combination of monalizumab and cetuximab is associated with a reshaping of “cold tumors” into “hot tumors” prone to sustain tumor immunity”.

Preliminary biomarker analysis show indeed that while the combination did not impair the distribution or absolute counts of peripheral NKG2A+ NK and CD8+ T cells, an infiltration of NK cells and CD8+T cells is detected very early upon treatment (day 15) at the tumor bed. Further, tumor-infiltrating NK and CD8+ T cells may be predictive of RECIST response, tumor reduction and PFS.

Importantly, the activity of the monalizumab and cetuximab combination appears to occur across HPV status, tumor burden and PD-L1 expression. 

The presentation is available in the monalizumab section on Innate Pharma’s website.

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