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Prostate CancerPhase 2NCT02293707

A Phase II Randomised Trial of Three Regimens of GX301 Vaccination in Castration-resistant Prostate Cancer

A Phase 2 study testing GX301 in people with Prostate Cancer, run by Laboratoires Leurquin Mediolanum at 24 sites in 2 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

GX301 is an experimental therapeutic vaccine directed against human telomerase, an enzyme playing an essential role in cancer cell proliferation. This clinical trial will test three different GX301 administration regimens in castration-resistant prostate cancer patients who have achieved response or disease stability… Read more about this study

Who is it for?
Ages 18 years and older, men only
Conditions the study is for
Prostate Cancer
What is being tested?
GX301
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
99 participants
Where
24 sitesin 2 countries
Study dates
Nov 2014to Nov 2019
Phase
Phase 2
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • Men only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Documented patient history
  • Histologically confirmed diagnosis of prostate cancer, with an available Gleason score.
  • Diagnosis of progressive, castration-resistant prostate cancer (CRPC), leading to inception of first-line chemotherapy with a docetaxel-based regimen.
  • Completion of chemotherapy with a cumulative delivered dose of 300 to 825 mg/m2 docetaxel.
  • Note: Pre-chemotherapy exposure to abiraterone and prednisone does not preclude eligibility, provided that both agents have been discontinued prior to initiation of docetaxel.
  • Current patient status
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  • Ability to understand study-related patient information and provision of written informed consent for participation in the study.
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.
  • Life expectancy of at least 6 months.
  • An interval ≥4 weeks elapsed from the last docetaxel administration.
  • Documented achievement of response or disease stability with docetaxel chemotherapy.
  • Absence of cancer-related symptoms suggesting clinical disease progression.
  • Current castrate testosterone level (≤50 ng/dL) due to current gonadotropin-releasing hormone (GnRH) agonist or antagonist therapy or past orchiectomy.
  • Haematology and blood chemistry tests within specified limits.
  • Successful recovery from acute toxicities from prior chemotherapy.
  • Confirmation from the immunology laboratory that the blood sample provided for baseline immunological tests is technically adequate.

Who cannot join

  • Known intolerance to Montanide or imiquimod.
  • Known presence of brain metastatic disease or spinal cord compression.
  • Radiotherapy within the past 4 weeks.
  • Concomitant presence of other primary malignancy
  • Major surgery within 4 weeks prior to randomisation.
  • Cardiovascular illness or complication which, in Investigator's judgment, compromises prognosis at 6 months or prevents the patient from following study procedures.
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  • Serious uncontrolled infection.
  • Known presence of active autoimmune disease.
  • Known presence of acquired, hereditary, or congenital immunodeficiency.
  • HIV infection.
  • Current need for immunosuppressive drug therapy, including systemic corticosteroids.
  • Current need for denosumab therapy. (Patients under bisphosphonate treatment are eligible).
  • Skin disease interfering with evaluation of local tolerance of GX301 injections.
  • Participation in any interventional drug or medical device study within 30 days prior to treatment start.

Trial locations and contacts

24 sites in 2 countries.

24 sites in 2 countries

Italy17 sites
  • S.C. di Oncologia, A.S.O. "Santi Antonio e Biagio e Cesare Arrigo"

    Alessandria, 15121

  • Oncologia Medica A, Centro di Riferimento Oncologico (CRO)

    Aviano, 33081

  • Oncologia Medica, Azienda Ospedaliero Universitaria - Policlinico Consorziale

    Bari, 70124

  • U.O.C. Urologia 1, A.O.U. Consorziale Policlinico di Bari

    Bari, 70124

  • Oncologia Medica, A.O. Spedali Civili

    Brescia, 25123

  • S.C. Oncologia Medica, Presidio Ospedaliero Busto Arsizio

    Busto Arsizio, 21052

  • IRCCS Fondazione del Piemonte per l'Oncologia (FPO)

    Candiolo, 10060

  • Clinica di Oncologia Medica, IRCCS San Martino-IST

    Genova, 16132

  • U.O. Medicina Oncologica - Ospedale San Raffaele IRCCS

    Milan, 20132

  • Unità Oncologica Medica Urogenitale, Istituto Europeo di Oncologia

    Milan, 20141

  • Dipartimento Uro-Ginecologico, IRCCS Istituto Nazionale Tumori - Fondazione Pascale

    Naples, 80131

  • U.O.C. di Oncologia Medica, A.O.R.N. "Antonio Cardarelli"

    Naples, 80131

  • Oncologia Medica, A.O. Universitaria San Luigi Gonzaga

    Orbassano, 10043

  • U.O. di Oncologia, AUSL di Piacenza

    Piacenza, 29100

  • Unita Oncologica, Azienda Ospedaliera S. Maria degli Angeli

    Pordenone, 33170

  • U.O.C. di Oncologia Medica, Policlinico "Le Scotte"

    Siena, 53100

  • Oncologia Medica d.U., Policlinico G.B. Rossi, A.O.U.I. Verona

    Verona, 37134

Other trials in Italy

Spain7 sites
  • Medical Oncology, Hospital Vall d'Hebron

    Barcelona, 08035

  • Hospital Clìnic i Provincial de Barcelona

    Barcelona, 08036

  • Medical Oncology, Institut Català d'Oncologìa

    L'Hospitalet de Llobregat, Barcelona, 08907

  • Oncología, Hospital Universitario Gregorio Marañón

    Madrid, 28007

  • Servicio de Oncologìa Médica, Hospital Universitario Ramòn y Cajal

    Madrid, 28034

  • Oncología Médica, Hospital Clínico San Carlos

    Madrid, 28040

  • Oncology, Corporaciò Sanitària Parc Taulì

    Sabadell, Barcelona, 08208

Other trials in Spain

About this study

Official title: A Randomised, Parallel-group, Open-label Phase II Trial of the Immunological Effects of Three Regimens of GX301 Vaccination in Castration-resistant Prostate Cancer Patients Who Have Achieved Response or Disease Stability With First-line Chemotherapy

GX301 is an experimental therapeutic vaccine directed against human telomerase, an enzyme playing an essential role in cancer cell proliferation.

This clinical trial will test three different GX301 administration regimens in castration-resistant prostate cancer patients who have achieved response or disease stability with first-line docetaxel treatment. This is aimed at identifying an optimal vaccination regimen.

The three regimens will primarily be compared for their efficacy and safety in inducing vaccine-specific immunological responses over a period of 6 months following treatment initiation. In addition, patients will be observed for the occurrence of disease progression and for their vital status up to 24 months.

Read the detailed description

GX301, an experimental therapeutic (anti-cancer) vaccine, is composed of four immunogenic peptides from human telomerase and two complementary adjuvants, Montanide ISA-51 VG and imiquimod.

An earlier Phase 1 study of GX301 has provided evidence of vaccine-specific immune response in a small sample of stage 4 prostate cancer patients given eight GX301 administrations over 9 weeks.

The present Phase 2, randomised, parallel-group, multicentre trial is aimed at comparing three different GX301 administration regimens in patients with progressive, castration-resistant prostate cancer who have completed a first-line docetaxel treatment and have achieved response to chemotherapy or disease stability. Primary comparisons will include regimen efficacy in inducing vaccine-specific immunological responses over a period of 6 months following randomisation; and treatment safety and tolerability over the same period.

A further study aim is to investigate whether achievement of immunological response, irrespective of the assigned GX301 regimen, is related to progression-free and/or overall survival.

Eligible patients will be randomly assigned to receive one of three GX301 vaccination regimens consisting of two, four or eight administrations, respectively, each regimen being given over a fixed 9-week period. Randomisation ratio will be 1:1:1. Randomisation will be stratified by previous cumulative exposure to docetaxel.

Following randomisation, immunological responses to GX301 will be determined over a 6-month period. However, on-study patient observation will be continued until the occurrence of one of the following end-points, whichever the earliest: (a) disease progression; (b) death; (c) completion of an 18-month observation period; or (d) patient's decision to terminate his participation in the study.

All patients discharged from the trial for reasons (a) or (c) will undergo a follow-up to ascertain survival until 24 months from randomisation.

Data analysis will be carried out in two sequential steps. The first step will focus on co-primary outcomes and will therefore take place upon completion of the study dataset up to the 6-month time-point. The second step will incorporate secondary outcomes and will therefore be conducted upon completion of the full study dataset.

Conditions
Prostate Cancer
Being tested
GX301
Keywords
Castration-resistant prostate cancer, Therapeutic vaccine, Telomerase vaccine
Medical subject headings
Prostatic Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • GX301Biological

    GX301 therapy consists of four human telomerase reverse transcriptase (hTERT) peptides and two adjuvants.

    Peptides are hTERT (540-548) Acetate, hTERT (611-626) Acetate, hTERT (672-686) Acetate and hTERT (766-780) Acetate. Adjuvants are Montanide ISA 51 VG and imiquimod 5% cream (Aldara).

    Each GX301 administration will consist of four intradermal injections - one injection for each hTERT peptide - given at the same time and followed by topical application of imiquimod. Each intradermal injection will consist of a fixed hTERT peptide dose, 500 µg, reconstituted as a solution and mixed with Montanide ISA 51 VG.

Study groups in NCT02293707
Study groupRoleWhat they receive
GX301 Regimen A (8 administrations)ExperimentalAdministration time frame: Day 1 to Day 63.
Receives: Biological: GX301
GX301 Regimen B (4 administrations)ExperimentalAdministration time frame: Day 1 to Day 63.
Receives: Biological: GX301
GX301 Regimen C (2 administrations)ExperimentalAdministration time frame: Day 1 to Day 63.
Receives: Biological: GX301

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Achievement of immunological response

    Measured: Days 90 and 180 following randomisation

  2. Incidence of adverse events

    Measured: Up to Day 180

  3. Changes from baseline in laboratory tests for immunological safety

    Measured: Days 63, 90 and 180

Secondary outcomes (5)
  1. Changes from baseline in serum prostate-specific antigen (PSA)

    Measured: Up to Day 540 or end of observation (if earlier)

  2. Progression-free survival

    Measured: Up to Day 540 or end of observation (if earlier)

  3. Overall survival

    Measured: Up to Day 720

  4. Incidence of adverse events

    Measured: Up to Day 540 or end of observation (if earlier)

  5. Changes from baseline in laboratory tests for immunological safety

    Measured: Up to Day 540 or end of observation (if earlier)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted18 Nov 2014 (estimated)
  2. Study startNov 2014
  3. Primary completionAug 2018
  4. Study completionNov 2019

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
99 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT02293707
Sponsor's protocol ID
MED-GX301-02
Other IDs
2014-000095-26, 2014
Status last verified
Jul 2020
First submitted
14 Nov 2014
Last updated
22 Jul 2020
Results posted
No
Data monitoring committee
No

Publications

  • Fenoglio D, Traverso P, Parodi A, Tomasello L, Negrini S, Kalli F, Battaglia F, Ferrera F, Sciallero S, Murdaca G, Setti M, Sobrero A, Boccardo F, Cittadini G, Puppo F, Criscuolo D, Carmignani G, Indiveri F, Filaci G. A multi-peptide, dual-adjuvant telomerase vaccine (GX301) is highly immunogenic in patients with prostate and renal cancer. Cancer Immunol Immunother. 2013 Jun;62(6):1041-52. doi: 10.1007/s00262-013-1415-9. Epub 2013 Apr 17.

    PubMed 23591981
  • Fenoglio D, Parodi A, Lavieri R, Kalli F, Ferrera F, Tagliamacco A, Guastalla A, Lamperti MG, Giacomini M, Filaci G. Immunogenicity of GX301 cancer vaccine: Four (telomerase peptides) are better than one. Hum Vaccin Immunother. 2015;11(4):838-50. doi: 10.1080/21645515.2015.1012032.

    PubMed 25714118
  • Filaci G, Fenoglio D, Nole F, Zanardi E, Tomasello L, Aglietta M, Del Conte G, Carles J, Morales-Barrera R, Guglielmini P, Scagliotti G, Signori A, Parodi A, Kalli F, Astone G, Ferrera F, Altosole T, Lamperti G, Criscuolo D, Gianese F, Boccardo F. Telomerase-based GX301 cancer vaccine in patients with metastatic castration-resistant prostate cancer: a randomized phase II trial. Cancer Immunol Immunother. 2021 Dec;70(12):3679-3692. doi: 10.1007/s00262-021-03024-0. Epub 2021 Aug 5.

    PubMed 34351436

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing GX301 in people with Prostate Cancer, run by Laboratoires Leurquin Mediolanum at 24 sites in 2 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 16 inclusion and 14 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 22 Jul 2020. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 24 sites in Italy, Spain. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Achievement of immunological response (time frame: Days 90 and 180 following randomisation). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT02293707, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 Jul 2020.

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