Safety and Efficacy of RUTI® With the Standard of Treatment for Tuberculosis

Last updated: January 29, 2024
Sponsor: Archivel Farma S.L.
Overall Status: Active - Recruiting

Phase

2

Condition

Hiv

Lung Disease

Treatment

Placebo

RUTI® Vaccine

Clinical Study ID

NCT05455112
CONSTAN-ARG
  • Ages > 18
  • All Genders

Study Summary

This study is proposed to evaluate the safety and efficacy of the RUTI vaccine in patients with pulmonary tuberculosis. Therapeutic vaccination of RUTI would stimulate the immune response not only against growing bacteria, but also against bacteria in a latent state that are less sensitive to antibiotic treatments. Therapeutic vaccination in patients with pulmonary tuberculosis could improve the speed of recovery of patients without inducing the appearance of drug resistance.

Eligibility Criteria

Inclusion

Inclusion Criteria:

  • Men and women aged 18 or older
  • Written informed consent
  • Laboratory confirmed pulmonary TB
  • Clinical symptoms compatible with pulmonary TB and/or X-ray evidence of pulmonary TB
  • Women of non-childbearing potential: at least 2 years post-menopausal or surgicallysterile (e.g. tubal ligation)
  • Women of childbearing potential (including women less than 2 years past menopause)must have a negative pregnancy test at enrollment and must agree to use dual-barriermethods of contraception, intrauterine device (IUD), bilateral tubal occlusion, sexualabstinence, or vasectomized partner.
  • Males must agree to use a double barrier method of contraception at least 1 monthafter RUTI/placebo vaccination; or the male patient or his female partner must besurgically sterile or the female partner must be post-menopausal
  • Willing and able to attend all study visits and comply with all study procedures
  • Verifiable address or place of residence easy accessible to perform visits and willingto inform the research team of any change during the treatment and follow-up period

Exclusion

Exclusion Criteria:

  • Unable to provide written informed consent
  • Women reported, or detected, or willing to be pregnant during the trial period; Menwilling to conceive a child during the study or 6 months after end of treatment
  • Severity of illness precluding full evaluation: expected early death, evidenced byrespiratory failure, low blood pressure, WHO performance score 3-4
  • Evidence or suspicion of resistance to rifampin, isoniazid, pyrazinamide, andethambutol, either laboratory-confirmed or based on epidemiological history atscreening
  • Previous treatment for M. tuberculosis in the previous 24 months.
  • Bodyweight < 40kg
  • Unstable Diabetes Mellitus as a poor metabolic control within the past 12 months
  • HIV-infected subjects
  • Major co-morbid conditions or any other finding which in the opinion of theinvestigator would compromise the protocol compliance or significantly influence theinterpretation of results
  • HIstory of severe mental ilness which, in the opinion of the investigator, may excludethe participant from participating in the trial.
  • Any of the following laboratory parameters:
  • Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) > 3 x upperlimit of normal (ULN)
  • Total bilirubin > 2 x ULN
  • Neutrophil count ≤ 500 neutrophils / mm3
  • Platelet count < 50,000 platelets / mm3
  • Alcohol use: potential participant either self-reports or in the investigator'sopinion that the patient drinks more than an average of four units/day over a usualweek or is a binge drinker (men: 5 or more drinks; women: consume 4 or more drinks, inabout 2 hours)
  • Known allergy or any hipersensitivity to study mediactions, including rifampin,isoniazid, pyrazinamide, and ethambutol, or any of its excipients.
  • Documented allergy to anti-TB vaccines or any excipient of the RUTI vaccine.
  • Concurrent enrolment in another clinical study, unless it is an observational (non-interventional) clinical study or during the follow-up period of aninterventional study

Study Design

Total Participants: 44
Treatment Group(s): 2
Primary Treatment: Placebo
Phase: 2
Study Start date:
October 29, 2022
Estimated Completion Date:
December 31, 2024

Study Description

The safety and immunogenicity of RUTI was established in healthy volunteers, patients with latent tuberculosis (TB); and Drug Susceptible (DS) -TB and Drug resistance (DR)-TB. This study proposed to evaluate the safety and efficacy of the RUTI vaccine in patients with active pulmonary TB. Immunotherapy for TB could shorten the sputum culture conversion, therefore reduce the time required to cure. Therapeutic vaccines do not interfere directly with the causative organism and hence, they are not involved in the development of drug resistance. Therapeutic vaccination would also be beneficial for DS-TB as it could increase the response to the standard therapy and help diminish the development of drug resistance. The vaccination stimulates the immune response during the continuation phase of TB treatment in which the remaining bacteria are poorly sensitive, if not refractory, to antimycobacterial agents, and potentiate chemotherapy. Reducing the huge reservoir of mycobacterium tuberculosis (DS or not) by vaccination strategies could ultimately accelerate elimination of the disease worldwide.

As per the results of the Phase II clinical trial in patients with latent TB, the best polyantigenic response was obtained with a dose of 25µg of RUTI vaccine and the second inoculation did not further increase the response. Based on these findings, a single dose of 25µg of vaccine will be used in the study.

The objective of this study is to i) explore the efficacy as reduction of bacillary load through the study of early bactericidal activity (EBA) in patients with DS-TB; and ii) provide data from safety perspective of the vaccine RUTI (25 µg FCMtb) in patients with TB, when given concomitant with the standard of care treatment initiation.

The study will include patients diagnosed with pulmonary DS-TB, candidate to start treatment with standard-care TB drugs and without any disease that could compromise the assessment of the response to the vaccination, or increase the risk of adverse events. RUTI will be administered on the day of TB treatment start, EBA will be measured on days 2, 4, 7, 10, 12, and 14, and adverse events will be collected up to week 24. Other measurements will be performed to assess the sputum culture conversion (SCC), clinical, X-ray or laboratory worsening, improvement of clinical signs and symptoms, and health-related quality-of-life (HRQOL).

Connect with a study center

  • Hospital José Nestor Lencinas

    Godoy Cruz, Mendoza M5547
    Argentina

    Active - Recruiting

  • Hospital de Clínicas Presidente Dr. Nicolás Avellaneda

    San Miguel De Tucumán, Tucumán T4001KKP
    Argentina

    Active - Recruiting

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