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Telacebec in Adults With Multibacillary Leprosy (TEBULA Leprosy Trial) (TEBULA LEPROSY)

30 oktober 2026 bijgewerkt door: Fondation Raoul Follereau

A Multicentre, Phase 2, Open-label, Randomised, Standard of Care-controlled and Dose-ranging Clinical Trial, Evaluating Safety and Efficacy of Telacebec in Adults With Multibacillary Leprosy (TEBULA Leprosy Trial)

The goal of this clinical trail is to evaluate whether short-course telacebec-based regimens can induce rapid and measurable reductions in M. leprae viability, potentially establishing the foundation for future shorter, safer, and simplified therapeutic strategies for MB leprosy.

Participants will be randomised into one of the four study arms (A, B, C and D). The arm A is non interventional. For arms B, C, and D, the three-month study drug treatment will be followed by 9 months of MDT, bringing the total treatment time to 12 months. This provision of MDT ensures that the participant has received the recommended standard treatment for leprosy and is primarily for ethics considerations.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

This is an open-label, randomised, controlled, multicentre phase II clinical trial conducted in Benin, Côte d'Ivoire and Ethiopia to evaluate the bactericidal efficacy of telacebec-based regimens in the treatment of multibacillary (MB) leprosy, with safety and tolerability as secondary objectives.

Participants who meet entry criteria and give consent will be randomised into four parallel groups: one control group (Group A) receiving standard WHO multidrug therapy (MDT); two investigational groups (Groups B and C) receiving telacebec monotherapy at two different dose levels; and one investigational group (Group D) receiving telacebec in combination with rifampicin. Upon completion of the assigned telacebec-based regimen, participants in Groups B, C, and D will subsequently receive standard WHO MDT.

Follow-up will be at least 12 months for all study arms; however, with the support of national programmes, patients may be followed for up to five years where possible.

Every fortnightly visit during the first three months (during which participants are taking study drugs) needs to be performed on the appointment day (±2 days). During post-IP treatment, once participants are on regular WHO MB-MDT, they are followed up on a monthly basis (-3/+2 days window). During the post-MDT period, they are followed up on a 3-monthly basis (±14 days window). The monthly dose of study medication must be taken as directly observed treatment (DOT) on the day of the visit. The Day 1 of the monthly WHO MB-MDT must also be taken as DOT.

The TEP is composed of clinicians experienced in the clinical management of leprosy, independent of the trial sites, and will provide assistance in reviewing the clinical response of participants included in the clinical trial. During the clinical follow-up, pictures of the lesions are taken systematically at every scheduled visit to document clinical evolution, identified with a code guaranteeing patient and treatment anonymity. After Day 84, pictures will be sent separately to each member of the TEP blinded to treatment allocation. The Technical Expert Panel (TEP) will give an independent assessment classifying each participant as showing clear improvement, moderate improvement, or no improvement.

At least three assessments from the TEP need to be collected for the decision. The decision will be taken by simple majority. If 4 out of 5 members provide an assessment and the decision is divided, a reserve list TEP member will be contacted.

Studietype

Ingrijpend

Inschrijving (Geschat)

120

Fase

  • Fase 2

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Contact Back-up

Studie Locaties

    • Pobé
      • Pobé, Pobé, Benin
        • Centre de Dépistage et de Traitement de la Lèpre et de l'Ulcère de Buruli (Raoul et Madeline Follereau) de Pobè
        • Contact:
        • Contact:
        • Hoofdonderzoeker:
          • Akimath Olagnidé Pélagie HABIB, Master

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

18 jaar tot 60 jaar (Volwassen)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  • Be an individual aged 18-60 years.
  • Has been diagnosed with MB leprosy with a Bacillary Index (BI) of at least 2+ on a slit skin smear (SSS).
  • Have no prior leprosy treatment (WHO MDT and/or dapsone monotherapy).
  • Be able to give voluntary informed consent.
  • Be able to complete the full study period and follow-up (with no planned migration and an accurate, known and accessible address).
  • Be able to accept hospitalisation for at least three months (site-specific requirement).
  • "Body weight < 85 kg at screening." (participants with weight >= 85 kg have an increased risk of severe transaminitis under telacebec)

Exclusion Criteria:

  • Unable to give voluntary informed consent.
  • Is a pregnant or breastfeeding woman.
  • Presenting with reinfection or relapse after WHO MDT/dapsone monotherapy, or has received anti-mycobacterial drugs in the last 30 days.
  • Presenting a leprosy reaction at diagnosis.
  • Being currently involved or having been involved within the last 30 days in a clinical trial.
  • Has any of the following medical conditions: a baseline QTcF of >450 ms or a clinically significant ECG abnormality or significant heart disease; HIV co-infection; HBV co-infection; history of or current pancreatitis; known or suspected cirrhosis of the liver; active clinical tuberculosis; any condition which, in the opinion of the investigator, may cause harm to the patient; known alcohol or drug addiction; known uncontrolled chronic disease such as diabetes (HbA1c >10%) or renal failure (GFR <50 ml/min); anaemia requiring transfusion.
  • Known glucose-6-phosphate dehydrogenase (G6PD) deficiency, due to risk of dapsone-induced haemolytic anaemia (G6PD testing required at screening).
  • Abnormal screening laboratory values, including: WBC <2.5 × 10⁹/L; Neutrophils <1.0 × 10⁹/L; Platelets <100 × 10⁹/L; AST or ALT >2 times the upper limit of the reference range; Albumin <30 mg/dL; Bilirubin >2 mg/dL (34 μmol/L); Calculated creatinine clearance (Cockcroft-Gault) <50 ml/min; Lipase ≥1.6 times the upper limit of the reference range.

Other eligibility consideration - Contraception

All women of reproductive potential must be tested for pregnancy at screening, and again before dosing at baseline (Day 0) and on Days 28, 42, 56, and 84 of the experimental treatment phase. Women with a positive pregnancy test after enrolment will have their treatment shifted to MDT if randomised to a telacebec-containing arm.

All women of reproductive potential must use two reliable and effective methods of contraception simultaneously while taking the study medication and up to two months after the last dose of telacebec. One highly effective form of contraception must be used (hormonal, IUD, prior tubal ligation, or partner's prior vasectomy) plus one additional effective method (male latex or synthetic condom, diaphragm or cervical cap). Male participants whose female partners are of reproductive age must also use contraception for up to 90 days after the last telacebec dose.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Geen tussenkomst: (Group A) receiving standard WHO multidrug therapy (MDT)

The World Health Organization recommends Multidrug Therapy (MDT) to cure leprosy. This standard treatment combines three medicines: (Rifampicin 300mg x 2) + (Clofazimin 100 mg x 3) + (Dapsone 50 mg) x 12 months

Experimenteel: Group B (Low dose)

(Telacebec 100 mg x 3 once monthly x 3 months) followed by (Rifampicin 300mg x 2) + (Clofazimin 100 mg x 3) + (Dapsone 50 mg) x 12 months

Telacebec 300 mg once monthly × 3 months

Experimenteel: Group C (Hight dose)

(Telacebec 100 mg x 6 once monthly x 3 months) followed by (Rifampicin 300mg x 2) + (Clofazimin 100 mg x 3) + (Dapsone 50 mg) x 12 months

Telacebec 600 mg once monthly × 3 months

Experimenteel: Group D (Combinaison)

(Telacebec 100 mg x 3 + Rifampicin 300 mg x 2 once monthly x 3 months) followed by (Rifampicin 300mg x 2) + (Clofazimin 100 mg x 3) + (Dapsone 50 mg) x 12 months

(Telacebec 300 mg + Rifampicine 600 mg) once monthly x 3 months

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Change from baseline in viable Mycobacterium leprae load in participants' skin lesions
Tijdsspanne: Baseline (Day 0) and Day 84

Treatment response of leprosy infection in each participant, measured in skin biopsies taken from the same lesion at baseline and Day 84 using the Molecular Viability Assay (MVA): quantitative RT-PCR of esxA and hsp18 transcripts, standardised to 3,000 bacilli. Reported as change in log10 viability; a larger decrease indicates a greater bactericidal effect of treatment in the participant. Arms B, C and D are compared with standard WHO MB-MDT (Arm A)

Baseline (Day 0) and Day 84

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Number of participants with treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs)
Tijdsspanne: From first dose through Day 84 (end of study drug period)

Clinical and laboratory adverse events, graded for severity and assessed for relationship to study drug, in participants receiving telacebec 300 mg, telacebec 600 mg, telacebec 300 mg + rifampicin 600 mg, or WHO MB-MDT

From first dose through Day 84 (end of study drug period)
Proportion of participants with clinical improvement of leprosy skin lesions
Tijdsspanne: Day 84 and Month 12 (end of treatment)

Assessed with standardised lesion-response criteria based on clinical examination and standardised photographs, classified as clear, moderate or no improvement. Classification validated by an independent external expert panel.

Day 84 and Month 12 (end of treatment)
Incidence and severity of leprosy reactions
Tijdsspanne: Baseline through Month 24 (end of follow-up)

Number of participants with Type 1 (reversal) reactions, defined by WHO criteria, and Type 2 reactions (erythema nodosum leprosum). ENL severity scored with the ENLIST ENL Severity Scale (EESS).

Baseline through Month 24 (end of follow-up)
Change in peripheral nerve sensory function
Tijdsspanne: Baseline, Day 84, Month 12, Month 24

Semmes-Weinstein monofilament thresholds at standardised sites of the hands and feet.

Baseline, Day 84, Month 12, Month 24
Change in peripheral nerve motor function
Tijdsspanne: Baseline, Day 84, Month 12, Month 24

Voluntary Muscle Testing (VMT) scores.

Baseline, Day 84, Month 12, Month 24
Number of participants with new nerve function impairment
Tijdsspanne: Baseline through Month 24
Baseline through Month 24
Change in health-related quality of life (EQ-5D)
Tijdsspanne: Baseline, Day 84, Month 12
Baseline, Day 84, Month 12

Andere uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Participant-reported global impression of change (PGI-C)
Tijdsspanne: Day 84, Month 12
Day 84, Month 12
Proportion of participants with viable M. leprae in skin lesions
Tijdsspanne: Baseline and Day 84

Skin biopsy material from a subset of participants (5 to 6 per group) are tested: Data reported per participant (presence of viable bacilli on day 84 compared to that participant's baseline sample).

Baseline and Day 84
Change from baseline in M. leprae rRNA synthesis (RS) ratio in participants' skin lesions
Tijdsspanne: Baseline and Day 84

Marker of ongoing bacterial replication in each participant's lesion

Baseline and Day 84
Number of participants who discontinue or interrupt study treatment because of adverse events
Tijdsspanne: Throught Day 84
Throught Day 84
Number of participants with treatment-emergent laboratory abnormalities
Tijdsspanne: Throught Day 84

Haematology, biochemistry and liver function tests

Throught Day 84
Plasma concentration of telacebec in participants
Tijdsspanne: Day 0 through Day 84

Sparse pharmacokinetic sampling

Day 0 through Day 84

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Onderzoekers

  • Hoofdonderzoeker: Roch Christian JOHNSON, Medical Doctor, PhD, HDR, Centre Interfacultaire de Formation et de Recherche en Environnement pour le Développement Durable (CIFRED), University of Abomey-Calavi

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

1 december 2026

Primaire voltooiing (Geschat)

1 november 2028

Studie voltooiing (Geschat)

1 november 2029

Studieregistratiedata

Eerst ingediend

21 september 2026

Eerst ingediend dat voldeed aan de QC-criteria

30 oktober 2026

Eerst geplaatst (Werkelijk)

5 november 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

5 november 2026

Laatste update ingediend die voldeed aan QC-criteria

30 oktober 2026

Laatst geverifieerd

1 oktober 2026

Meer informatie

Termen gerelateerd aan deze studie

Andere studie-ID-nummers

  • TEB-LEP2025-01
  • 101190742 (Ander subsidie-/financieringsnummer: European Union)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

JA

Beschrijving IPD-plan

The plan is not yet developed

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

product vervaardigd in en geëxporteerd uit de V.S.

Nee

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