Bcl-XL_42-CAF09b Vaccination for Patients With Prostate Cancer With Lymph Node Metastases

A Phase I Study of the Bcl-XL_42-CAF09b Vaccine to Test Safety and Immunological Effect in Patients With Prostate Cancer With Lymph Node Metastases

In this Phase I study, patients with hormone-sensitive Prostate Cancer (PC) and lymph node metastases are treated with the cancer vaccine Bcl-xl_42-CAF09b. The aim of the study is to clarify the safety and toxicity of the vaccine and also the immunological effect.

The vaccine Bcl-xl_42-CAF09b is composed of the peptide Bcl-xl_42 and the adjuvant CAF09b. The B-cell lymphoma extra large protein (Bcl-xl) protein plays a vital role in the cancer cell's ability to avoid programmed cell death (apoptosis) and is upregulated in a variety of cancerous diseases. Bcl-xl_42 is a peptide fragment of the full protein and preclinical studies have shown that vaccination with this peptide (Bcl-xl) can activate the immune system and thereby lead to the death of cancer cells. In order to improve the activation of the immune system, adjuvant CAF09b is added; Preclinical studies have shown that special intraperitoneal (IP) injections of CAF09b improve the activation of the immune system.

Study Overview

• Status: Completed
• Conditions: Prostate Cancer
• Intervention / Treatment: Biological: Bcl-Xl_42-CAF09b vaccine

Detailed Description

Background:

In this Phase I study, patients with hormone-sensitive Prostate Cancer (PC) and lymph node metastases are treated with the cancer vaccine Bcl-xl_42-CAF09b. The aim of the study is to clarify the safety and toxicity of the vaccine and also the immunological effect.

Patients included should be on Bicalutamid treatment upon inclusion. The vaccine Bcl-xl_42-CAF09b is composed of the peptide Bcl-xl_42 and the adjuvant CAF09b. The B-cell lymphoma extra large protein (Bcl-xl) protein plays a vital role in the cancer cell's ability to avoid programmed cell death (apoptosis) and is upregulated in a variety of cancerous diseases. Bcl-xl_42 is a peptide fragment of the full protein and preclinical studies have shown that vaccination with this peptide (Bcl-xl) can activate the immune system and thereby lead to the death of cancer cells.

In order to improve the activation of the immune system, adjuvant CAF09b is added; Preclinical studies have shown that special intraperitoneal (IP) injections of CAF09b improve the activation of the immune system.

The CAF09 adjuvant has been developed by Statens Serum Institut (SSI). It is a three-component adjuvant system, composed of cationic liposomes (DDA-MMG1) with complex bound synthetic double-stranded RNA (Poly(I:C)2). The adjuvant was developed as a means to induce cytotoxic CD8+ T-cell responses against vaccine antigens and intended for use in vaccines against disease targets such as cancers, human immunodeficiency virus or Hepatitis C virus. The Poly(I:C) component has previously been in clinical studies as a cancer treatment. Poly(I:C) is known for its pyrogenic activity but upon formulation in the cationic liposome system, CAF09, the pyrogenic effect is significantly reduced.

Methods:

20 patients will be included in this phase I trial. 10 patients will be included in arm A and 10 patients in arm B. Arm a will recieve 3 vaccines every second week IM and thereafter 3 vaccines every second week IP. Arm B will first receive 3 vaccines every second week IP and thereafter every second week IM. All 20 patients will recieve 6 vaccines all in all. This is not randomized - the first 10 patients included will be in arm A and the last 10 patients included will be in arm B.

Patients will be followed with clinical controls every second week.

• Study Type: Interventional
• Enrollment (Actual): 20
• Phase: Phase 1

Contacts and Locations

Study Locations

• Denmark
  • Herlev, Denmark, 2730
    • Herlev Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Male

Description

Inclusion Criteria:

1. Age ≥ 18 years
2. Histologically Verified Adenocarcinoma Prostatae
3. Diagnostic and / or histologically verified lymph node metastases
4. ECOG Performance Status ≤2
5. Primary anti-androgen treatment started

6. Adequate haematological, renal and hepatic function:

   1. Neutrophil granulocytes ≥ 1.5 x 109 / l
   2. Platelet counts ≥ 100 x 109 / l
   3. hemoglobin ≥ 5.6 mmol / l
   4. Serum creatinine ≤ 1.5 times upper normal limit
   5. AST or ALAT ≤ 2.5 times upper normal limit
   6. serum bilirubin ≤ 1.5 times upper normal limit
   7. Alkaline phosphatase ≤ 2.5 times upper normal limit
   8. INR <1.5 / PP <40

Exclusion Criteria:

1. Verified bone or visceral metastases
2. Serious allergy or previous anaphylactic reactions
3. Known hypersensitivity to any of the active substances or to any of the excipients.
4. Other malignant disease within the last three years, rendering planocellular and basocellular skin carcinoma
5. Known infection with HIV, hepatitis B and C virus, regardless of whether the infection is kept calm with medical treatment
6. Severe medical disorder, severe asthma, severe COPD, poorly regulated cardiovascular disease or diabetes
7. Active autoimmune disease, e.g. autoimmune neutropenia / thrombocytopenia or hemolytic anemia, systemic lupus erythematosus, scleroderma, myasthenia gravis, goodpasture syndrome, Addison's disease, Hashimoto's thyroiditis, active grave disease, morbus chrohn or ulcerative colitis
8. Major gastrointestinal surgical procedures within the last 3 months
9. Previous treatment with other cancer vaccine
10. Concomitant immunosuppressive treatment including prednisolone and methotrexate
11. Ongoing anticoagulant treatment (treatment with acetylsalicylic acid and clopidogrel is allowed)
12. Psychiatric disease which, according to the investigator's discretion, may affect compliance
13. Co-administration with other experimental drugs.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: TREATMENT
• Allocation: NON_RANDOMIZED
• Interventional Model: SEQUENTIAL
• Masking: NONE

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
EXPERIMENTAL: Arm A: IM followed by IP; Will be administered first 3 vaccines biweekly IM and thereafter 3 vaccines biweekly IP.	Biological: Bcl-Xl_42-CAF09b vaccine; The vaccine consists of 0.05 mg peptide (bcl-xl_42) and 625 μg DDA, 125 μg MMG og 31 μg Poly I:C (CAF09b) mixed in a 0.5 ml emulsion
EXPERIMENTAL: Arm B: IP followed by IM; Will be administered first 3 vaccines biweekly IP and thereafter 3 vaccines biweekly IM.	Biological: Bcl-Xl_42-CAF09b vaccine; The vaccine consists of 0.05 mg peptide (bcl-xl_42) and 625 μg DDA, 125 μg MMG og 31 μg Poly I:C (CAF09b) mixed in a 0.5 ml emulsion

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number and type of reported adverse events	Determine the safety of the Bcl-XL_42-CAF09b vaccine for patients with prostate cancer with lymph node involvement who are on Bicalutamid treatment by reporting adverse events according to CTCAE v. 4.0	0-30 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Treatment related immune responses	To evaluate the immunological impact of the treatment in both arm A and arm B. Elispot and tetramer staining methods will be Applied to identify Bcl-XL_42 peptide specific T cells in the blood over time	Up to 24 months

Collaborators and Investigators

• Sponsor: Herlev Hospital
• Investigators: Study Director: Inge Marie svane, Sponsor GmbH

Study record dates

Study Major Dates

• Study Start (ACTUAL): May 1, 2018
• Primary Completion (ACTUAL): December 8, 2021
• Study Completion (ACTUAL): December 8, 2021

Study Registration Dates

• First Submitted: January 2, 2018
• First Submitted That Met QC Criteria: January 25, 2018
• First Posted (ACTUAL): January 26, 2018

Study Record Updates

• Last Update Posted (ACTUAL): January 11, 2022
• Last Update Submitted That Met QC Criteria: January 10, 2022
• Last Verified: January 1, 2022

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Pathologic Processes; Neoplasms; Urogenital Neoplasms; Neoplasms by Site; Genital Neoplasms, Male; Prostatic Diseases; Neoplastic Processes; Neoplasm Metastasis; Prostatic Neoplasms; Lymphatic Metastasis
• Other Study ID Numbers: UR1534

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No