TransCon (TC) TLR7/8 Agonist, TC IL-2 β/γ, Pembrolizumab Prior to Surgery for Advanced Head and Neck Squamous Cell Carcinoma

Head and Neck Neoplasms Clinical Trial

— BelieveIT-201  

Official title:

BelieveIT-201: Phase 2, Randomized Open-labeled Trial of TransCon (TC) TLR7/8 Agonist in Combination With Pembrolizumab or With TC IL-2 β/γ, or Pembrolizumab Alone as Neoadjuvant Therapy for Stage III-IVA Resectable Locoregionally Advanced Head and Neck Squamous Cell Carcinoma

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05980598
• Other study ID #: ASND0038
• Status: Recruiting
• Phase: Phase 2
• Start date: September 29, 2023
• Est. completion date: July 30, 2027

Study information

• Verified date: June 2024
• Source: Ascendis Pharma A/S
• Contact: Elizabeth Bradley
• Phone: +1 (650) 519-7179
• Email: elbr[@]ascendispharma.com
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The purpose of this trial is to evaluate the safety and efficacy of TransCon TLR7/8 Agonist, TransCon IL-2 β/γ, and pembrolizumab given prior to curative intent surgery in treatment of participants with newly diagnosed Stage III/IVA resectable locoregionally advanced head and neck squamous cell carcinoma (LA-HNSCC). After surgery, participants will receive local standard-of-care treatment and will be followed for safety, efficacy, and survival for up to 2 years.

This trial contains a safety run-in to evaluate the safety and tolerability of the two treatment arms: Arm A (TransCon TLR7/8 Agonist plus pembrolizumab) and Arm B (TransCon TLR7/8 Agonist plus TransCon IL-2 β/γ). The safety run-in will be followed by the randomized Phase 2, open-label part of the trial comparing the safety, efficacy and survival of treatment Arm A or Arm B compared to treatment Arm C (pembrolizumab monotherapy).

Description:

This is a randomized, Phase 2, open-label, multicenter trial of TransCon TLR7/8 Agonist in combination with pembrolizumab, TransCon TLR7/8 Agonist in combination with TransCon IL-2 β/γ, or pembrolizumab monotherapy as neoadjuvant therapy in participants with Stage III-IVA resectable LA-HNSCC.

This trial starts with a safety run-in of 12 participants, 6 participants each in Arms A (TransCon TLR7/8 Agonist plus pembrolizumab) and B (TransCon TLR7/8 Agonist plus TransCon IL-2 β/γ) randomized 1:1.

After completing the safety run-in, 80 participants will be randomized in a 2:2:1 ratio in 3 treatment Arms A, B or C (pembrolizumab monotherapy).

Once randomized, participants should begin treatment within 5 calendar days. Participants enrolled after the safety run-in, into the 2:2:1 randomization part of the trial, will be stratified as follows: oropharyngeal HPV p16 positive versus oropharyngeal HPV p16 negative or larynx/hypopharyngeal/oral cavity regardless of HPV p16 status. All participants should receive study drug(s) every 21 days (Q21D) for 2 cycles followed by curative-intent surgery. After surgery, participants may receive standard-of-care treatment in the adjuvant setting, as per investigator's decision and local guidelines.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 92
• Est. completion date: July 30, 2027
• Est. primary completion date: April 14, 2025
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Has local histologically confirmed new diagnosis of resectable, non-metastatic, SCC that is either: Stage III tumor HPV-positive oropharyngeal primary that is tumor size (T) 4, lymph node involvement (N) 0-2, no distant metastases (M) 0; Stage III or IVA oropharyngeal tumor HPV-negative; or Stage III or IVA larynx/hypopharynx/oral cavity primaries regardless of HPV status (per American Joint Committee on Cancer [AJCC] Staging, 8th edition).

• Has available archived or fresh core or excisional biopsy of a tumor lesion. Note:

Fine needle aspirations may be allowed after discussion with Medical Monitor.

• Is eligible and plans for primary LA-HNSCC surgery based on investigator decision and per local practice.

• Has results from tumor HPV status by p16 immunohistochemistry (IHC) for oropharyngeal tumors. (HPV DNA analysis for HPV tumor status is acceptable if that is the local standard of care analysis.)

• Has adequate organ function at screening.

• Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1.

• Has at least one lesion that is deemed by the investigator to be easily and safely accessible for IT injection.

Exclusion Criteria:

• Active autoimmune conditions.

• Has significant cardiac disease.

• Has a known bleeding disorder that is deemed to place the participant at unacceptable risk for bleeding complications from IT injections or biopsies.

• Has a diagnosis of immunodeficiency or is receiving systemic steroid therapy (in doses exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior to randomization.

Related Conditions & MeSH terms

• Carcinoma, Squamous Cell
• Head and Neck Neoplasms
• Squamous Cell Carcinoma of Head and Neck

Intervention

Drug:
• TransCon TLR7/8 Agonist
TLR7/8 agonist prodrug
• Pembrolizumab
A type of immunotherapy that works by blocking the PD-1 pathway to help prevent cancer cells from hiding
• TransCon IL-2 ß/?
Sustained systemic release of IL-2 ß/? with selective receptor binding that may stimulate the immune system to kill cancer cells

Locations

Country	Name	City	State
Georgia	Ascendis Investigational Site	Kutaisi	Imereti
Georgia	Ascendis Investigational Site	Tbilisi
Georgia	Ascendis Investigational Site	Tbilisi
Georgia	Ascendis Investigational Site	Tbilisi
Georgia	Ascendis Investigational Site	Tbilisi
Georgia	Ascendis Investigational Site II	Tbilisi
Germany	Ascendis Investigational Site	Erlangen	Bavaria
Germany	Ascendis Investigational Site	Mannheim
Hungary	Ascendis Investigational Site	Budapest
Hungary	Ascendis Investigational Site	Debrecen
Hungary	Ascendis Investigational Site	Gyor
Hungary	Ascendis Investigational Site	Pécs	Baranya
Italy	Ascendis Investigational Site	Meldola
Italy	Ascendis Investigational Site	Naples
Italy	Ascendis Investigational Site	Novara
Spain	Ascendis Investigational Site	Barcelona
Spain	Ascendis Investigational Site	Barcelona
Spain	Ascendis Investigational Site	El Palmar
Spain	Ascendis Investigational Site	Madrid
Spain	Ascendis Investigational Site	Madrid
Spain	Ascendis Investigational Site II	Madrid
Spain	Ascendis Investigational Site	Málaga
Spain	Ascendis Investigational Site	Pamplona
Spain	Ascendis Investigational Site	Terrassa
Spain	Ascendis Investigational Site	Valencia
Spain	Ascendis Investigational Site	Valencia
Spain	Ascendis Investigational Site	Valencia
Taiwan	Ascendis Investigational Site	Kaohsiung City
United States	Ascendis Pharma Investigational Site	Canton	Ohio
United States	Ascendis Investigational Site	Charleston	South Carolina
United States	Ascendis Investigational Site	Cincinnati	Ohio
United States	Ascendis Investigational Site	Detroit	Michigan
United States	Ascendis Investigational Site	Houston	Texas
United States	Ascendis Investigational Site	Knoxville	Tennessee
United States	Ascendis Investigational Site	Los Angeles	California
United States	Ascendis Investigational Site	Louisville	Kentucky
United States	Ascendis Investigational Site	San Francisco	California

Sponsors (1)

Lead Sponsor	Collaborator
Ascendis Pharma Oncology Division A/S

Countries where clinical trial is conducted

United States,  Georgia,  Germany,  Hungary,  Italy,  Spain,  Taiwan, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Major Pathological Response	The proportion of participants with a major pathological response (mPR) as assessed by the Central Pathologist at the time of definitive surgery. mPR is defined as =10% invasive squamous cell carcinoma within the resected primary tumor specimen and all the sampled regional lymph nodes.	Up to 6 weeks after Cycle 2 (each cycle is 21 days)
Secondary	Pathological Complete Response	A central pathology laboratory and local hospital pathologist will evaluate if all the tumor is completely gone from the primary tumor and all the lymph nodes that were removed at surgery.	Up to 6 weeks after Cycle 2 (each cycle is 21 days)
Secondary	Event Free Survival	The time from the date of randomization to the date of first record of any of the following events: disease progression; local or distant recurrence determined by radiology scans or tumor biopsy as needed, or death due to any cause.	Up to 5 years
Secondary	Overall Survival	The time from randomization to death due to any cause.	Up to 5 years
Secondary	Safety and Tolerability	Incidence and severity of adverse events (AEs) and serious adverse events (SAEs).	From time of signing of the ICF up to 100 (±7) days following the last dose of study drug