TENDU Vaccine in Patients With Relapse After Primary Radical Prostatectomy

Prostate Cancer Clinical Trial

Official title:

Safety and Effect of Different Doses of TENDU Vaccine, a Therapeutic Peptide Conjugate Vaccine, in Patients With Relapse After Primary Radical Prostatectomy

Clinical Trial Details — Status: Active, not recruiting

Administrative data

• NCT number: NCT04701021
• Other study ID #: TENDU-101
• Status: Active, not recruiting
• Phase: Phase 1
• Start date: February 17, 2021
• Est. completion date: December 31, 2023

Study information

• Verified date: November 2023
• Source: Ultimovacs ASA
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This is a phase I, dose selection study of safety and effect of different doses of TENDU vaccine, a therapeutic peptide conjugate vaccine, in patients with relapse after primary radical prostatectomy.

Description:

This is a open label dose selection study to investigate the safety, tolerability, immune response and preliminary clinical effect of different doses of the TENDU vaccine. TENDU is a synthetic therapeutic peptide conjugate vaccine intended for treatment of prostate cancer.

The patients enrolled in this study is adults with documented progressive disease after radical prostatectomy and who are eligible for salvage radiotherapy and short-term (6 months) androgen deprivation therapy.

All patients taking part at the study must be vaccinated with a Boostrix vaccine (including tetanus antigen) one week prior to the first TENDU vaccine treatment.

Three different doses, 40, 400 and 960 μg of the TENDU vaccine are to be investigated.

The vaccine is administrated by subcutaneous injections with one injection per drug substance (four separate injections) consecutively. The TENDU vaccine will be given four times during a treatment period lasting for 6 weeks and followed up for 6 months after the last treatment.

In total between 12 to 18 patients will be enrolled with a 3+3 design in each dose cohort. The first patient will receive the lowest dose of the TENDU vaccine, and after the treatment is completed, a safety evaluation will be done to evaluate enrolment of the next patients in this cohort. If one patient develops a dose limiting toxicity at a specific dose, an additional three patients are to be enrolled into that same dose cohort, and on the recommended dose an addition of 3 patients will be enrolled.

Recruitment information / eligibility

• Status: Active, not recruiting
• Enrollment: 12
• Est. completion date: December 31, 2023
• Est. primary completion date: August 31, 2023
• Accepts healthy volunteers: No
• Gender: Male
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

1. Males =18 years of age

2. PSA rise >0.2 ng/mL less than 18 months following radical prostatectomy (RP) and pathological ISUP Grade 4-5 (Gleason score >7), or persisting PSA >0.1 ng/mL six weeks after RP and short PSA-DT, eligible for salvage radiotherapy and short term androgen deprivation therapy

3. ECOG performance status 0 or 1

4. Adequate organ function as indicated by the following laboratory values:

• White blood cell count = 2,500/µL

• Absolute neutrophil count = 1,000/µL

• Platelets = 100,000/µL

• Haemoglobin = 9 g/dL or = 5.6 mmol/L

• Serum creatinine = 1.5 x upper limit of normal (ULN)

• Serum total bilirubin = 1.5 x ULN or direct bilirubin = ULN for patients with total bilirubin levels > 1.5 ULN

• AST and ALT = 2.5 x ULN

5. Patients with potential to father children must use an acceptable contraceptive method

6. Written informed consent prior to any study-specific evaluations

Exclusion Criteria:

1. History of hematologic or primary solid tumor malignancy other than prostate cancer with remission less than 3 years prior study enrolment.

2. Metastatic disease assessed by PSMA PET/CT

3. Hypersensitivity to the active substance or any of its excipients

4. Current use of androgen deprivation therapy or radiotherapy to the pelvis

5. Known history or any evidence of active, non-infectious pneumonitis

6. History of New York Heart Association class 3-4 congestive heart failure or history of myocardial infarction within 6 months of starting study treatment

7. Active autoimmune disease that has required systemic treatment in past 2 years (i.e. with use of disease modifying agents, corticosteroids or immunosuppressive drugs). Patients with vitiligo or resolved childhood asthma/atopy would be an exception to this rule.

8. Active infection requiring systemic therapy

9. Diagnosis of immunodeficiency

10. Any use of immunosuppressive (cytotoxic chemotherapy, systemic steroids) or immunomodulating agents within 8 weeks of study entry.

11. Hepatitis B or Hepatitis C or Human Immunodeficiency Virus positive

12. Expected to require any other form of systemic or localized antineoplastic therapy during the study

13. Received any other investigational therapy within 4 weeks of the first dose of study treatment

14. Any medical, psychological, social or neurological condition that would make it difficult for the patient to participate in the study and comply with the study procedures, restrictions, and requirements

Related Conditions & MeSH terms

• Prostate Cancer
• Prostatic Neoplasms
• Recurrence

Intervention

Biological:
• TENDU
The vaccine is administrated by subcutaneous injections, one injection per drug substance (four separate injections) consecutively.

Locations

Country	Name	City	State
Norway	Oslo University Hospital, The Norwegian Radium Hospital	Oslo

Sponsors (1)

Lead Sponsor	Collaborator
Ultimovacs ASA

Country where clinical trial is conducted

Norway, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	Assessment of antibody titers	Evaluation of antibody titers against PAP and PSMA peptides epitopes presented in the TENDU vaccine.	Time from enrollment until 6 months after last dose
Other	Assessment of possible biomarkers	Assessment of possible biomarkers e.g. phenotyping of circulating tumor cells (CTCs)	Time from enrollment until 6 months after last dose
Primary	Assessment of safety and tolerability of TENDU vaccine	Frequency and severity of Adverse Events (AEs) graded according to CTCAE version 5.0.	Time from enrollment until 6 months after last dose
Secondary	Assessment of Immunological response	To evaluate the immunological response against the prostate specific peptides in the patients at baseline and after TENDU vaccinations.	Time from enrollment until 6 months after last dose
Secondary	Assessment of anti-tetanus protein and anti-MTTE titers	To evaluate the preliminary anti-tumor activity of the TENDU vaccine in patients pre- and post the vaccination with Boostrix (including tetanus antigen) and the TENDU vaccinations by evaluation of anti-tetanus protein and anti-MTTE titers.	Time from enrollment until 6 months after last dose
Secondary	Assessment of Anti-tumor activity	To evaluate the preliminary anti-tumor activity of the TENDU vaccine according to changes in the PSA, PAP, PSMA and PET/CT.	Time from enrollment until 6 months after last dose