A Clinical Study to Investigate the Efficacy of Intratumoral Tigilanol Tiglate in Soft Tissue Sarcoma

• ClinicalTrials.gov Identifier: NCT05755113
• Recruitment Status: Recruiting
• First Posted: March 6, 2023
• Last Update Posted: May 31, 2023
• Sponsor: QBiotics Group Limited
• Information provided by (Responsible Party): QBiotics Group Limited

Tracking Information

• First Submitted Date: February 16, 2023
• First Posted Date: March 6, 2023
• Last Update Posted Date: May 31, 2023
• Actual Study Start Date: April 13, 2023
• Estimated Primary Completion Date: July 2024 (Final data collection date for primary outcome measure)

Current Primary Outcome Measures (submitted: March 2, 2023)

Tumour Response [ Time Frame: 6 months ]

Proportion of participants who have achieved partial or complete ablation of treated tumour(s) and/or tumour segment(s) following injection(s) with tigilanol tiglate.

• Original Primary Outcome Measures: Same as current

Current Secondary Outcome Measures (submitted: March 2, 2023)

• Incidence of Adverse Events (AEs) and Serious Adverse Events (SAEs) [ Time Frame: 6 months ]
  Total number of Adverse Events (AEs) and Serious Adverse Events (SAEs) and number of AEs and SAEs deemed related to tigilanol tiglate.
• Systemic Exposure [ Time Frame: Up to 24 hours after the first dose ]
  Evaluation of how much tigilanol tiglate is circulating in the blood after a single injection.

• Original Secondary Outcome Measures: Same as current

Current Other Pre-specified Outcome Measures (submitted: March 2, 2023)

• Tumour Microenvironment [ Time Frame: 14 days after the first treatment. ]
  To assess changes in the tumour microenvironment by looking at the change from baseline of immune cell infiltration in tumour biopsy tissue collected after injection with tigilanol tiglate.
• Evaluation of Peripheral Blood Mononucleocytes (PBMCs) [ Time Frame: 24 weeks ]
  Evaluation of Peripheral Blood Mononucleocytes (PBMCs).
• Local Recurrence Rate at injection site(s) [ Time Frame: 6 months ]
  Percentage of participants with local recurrence at injection site(s) at 6-months after first treatment.

• Original Other Pre-specified Outcome Measures: Same as current

Descriptive Information

• Brief Title: A Clinical Study to Investigate the Efficacy of Intratumoral Tigilanol Tiglate in Soft Tissue Sarcoma
• Official Title: A Phase IIa Open Label Study Evaluating the Preliminary Efficacy of Intratumoural Tigilanol Tiglate in Advanced and/or Metastatic Soft Tissue Sarcoma of the Extremities and Body Wall.
• Brief Summary: A Phase IIa open label study evaluating the preliminary efficacy of intratumoural tigilanol tiglate in advanced and/or metastatic soft tissue sarcoma of the extremities and body wall.

Detailed Description

Primary Objective

1. To evaluate tumour ablation in tumours and/or tumour segments following one or more treatments with tigilanol tiglate.

Secondary Objective

1. To assess the safety and tolerability of intratumoural injections with tigilanol tiglate; and
2. To evaluate systemic exposure through pharmacokinetic (PK) assessment after a single intratumoural injection of tigilanol tiglate.

Exploratory Objectives

1. To evaluate the microenvironment of injected tumours;
2. To evaluate the degree of immune response elicited with intratumoural tigilanol tiglate;
3. To evaluate local recurrence rate.

• Study Type: Interventional
• Study Phase: Phase 2

Study Design

Allocation: N/A
Intervention Model: Single Group Assignment
Intervention Model Description:

Open label, single arm

Masking: None (Open Label)
Primary Purpose: Treatment

• Condition: Soft Tissue Sarcoma

Intervention

Drug: Tigilanol Tiglate

Tigilanol tiglate is a novel, short-chain diterpene ester in clinical development for intratumoural treatment of a wide range of solid tumours.

Other Name: EBC-46

Study Arms

Experimental: Single Arm, Open Label

Single or multiple Intratumoural injections of tigilanol tiglate at up to a fixed dose of 3.6 mg/m2 (Body Surface Area [BSA]) per treatment.

Intervention: Drug: Tigilanol Tiglate

• Publications *: Not Provided

Recruitment Information

• Recruitment Status: Recruiting
• Estimated Enrollment (submitted: March 2, 2023): 10
• Original Estimated Enrollment: Same as current
• Estimated Study Completion Date: March 2025
• Estimated Primary Completion Date: July 2024 (Final data collection date for primary outcome measure)

Eligibility Criteria

Inclusion Criteria:

1. Are willing and able to provide written informed consent for the study prior to any protocol-specific procedures and to comply with all local and study requirements.
2. Are ≥ 18 years of age on the day of providing informed consent.
3. Have advanced and/or metastatic disease of the body wall or extremities that is amenable to intratumoural injection either by palpation or under ultrasound guided injection, that has been histologically or pathologically confirmed as an STS. STS located on the scalp may also be considered for treatment.
4. Have an Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 2.
5. Have life expectancy of more than 12 weeks.
6. Have adequate renal and hepatic function as assessed by the Investigator.
7. Female participants who are Women Of Child-Bearing Potential (WOCBP) must have a negative serum pregnancy test at Screening (within 14 days of the first study drug administration), must be willing to use a highly effective contraception from date of consent, throughout the study period and up to 30 days after the last study drug administration, and must not be breastfeeding.
8. Male participants with a potentially fertile female partner are eligible if they have had a vasectomy or are willing to use adequate contraception from prior to commencement of study drug administration, throughout the study period and up to 30 days after the last study drug administration, and must not donate sperm throughout the study period and up to 30 days after the last study drug administration.

Exclusion Criteria:

1. Are planning to receive intratumoural treatment or radiotherapy to any of the tumours intended for injection within 28 days prior to Screening, or during treatment with tigilanol tiglate.
2. Have a tumour intended for injection that is immediately adjacent to, or with infiltration into, any major artery or vein (e.g., if the tumour for injection is located adjacent to the jugular vein).
3. Are receiving or have received other investigational agents or have used an investigational device without undergoing a 28-day (or 5 half-lives, whichever is shorter) wash-out period prior to their first treatment with tigilanol tiglate. These patients must have recovered from all AEs due to previous investigational therapies to ≤ Grade 1 at baseline.
4. Are receiving or have received systemic anticancer therapy, without undergoing a 28-day (or 5 half-lives, whichever is shorter) wash-out period prior to their first treatment with tigilanol tiglate. These patients must have recovered from all AEs due to previous therapies to ≤ Grade 1 at baseline. Patients with ≤ Grade 2 neuropathy may be eligible following discussion with Sponsor Medical Monitor.
5. Have had major surgery within 28 days of their first treatment with tigilanol tiglate or anticipate the need for major surgery during the study period. Minor surgical procedures are permitted, but with sufficient time for wound healing.
6. Have known, active brain metastases and/or carcinomatous meningitis. Participants who have previously treated brain metastases and are neurologically stable can be included.
7. Have any bleeding diathesis or coagulopathy that would make intratumoural injection or biopsy unsafe, or if they are on therapeutic warfarin therapy.
8. Have a history of allergic reactions or severe hypersensitivity (Grade ≥ 3) attributed to tigilanol tiglate or compounds of similar chemical or biologic composition to tigilanol tiglate, any of its excipients or other agents used in the study.
9. In the opinion of the treating Investigator, they are not an appropriate candidate for the study for any reason (e.g., they have known psychiatric or substance abuse disorder that would interfere with their ability to cooperate with the requirements of the study.

Sex/Gender

• Sexes Eligible for Study: All

• Ages: 18 Years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Contacts

Contact: Head of Human Clinical Operations; +61 (0) 738 708 933; enquiries@qbiotics.com

• Listed Location Countries: United States

Administrative Information

• NCT Number: NCT05755113
• Other Study ID Numbers: QB46C-H07; U1111-1282-2967 ( Other Identifier: [WHO Universal Trial Number (UTN)] )
• Has Data Monitoring Committee: No

U.S. FDA-regulated Product

• Studies a U.S. FDA-regulated Drug Product: Yes
• Studies a U.S. FDA-regulated Device Product: No

IPD Sharing Statement

• Plan to Share IPD: No

• Current Responsible Party: QBiotics Group Limited
• Original Responsible Party: Same as current
• Current Study Sponsor: QBiotics Group Limited
• Original Study Sponsor: Same as current
• Collaborators: Not Provided

Investigators

• Principal Investigator: Edmund Bartlett, MD; Memorial Sloan Kettering Cancer Center

• PRS Account: QBiotics Group Limited
• Verification Date: April 2023