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Safety and Efficacy of STL303 In Patients With Primary Immunoglobulin A (IgA) Nephropathy

24 de mayo de 2026 actualizado por: Sitala Bio LTD

A Multicenter, Randomised, Double-Blinded, Placebo-Controlled Study to Evaluate the Safety and Efficacy of STL303 In Patients With Primary Immunoglobulin A (IgA) Nephropathy

This is a multicenter, randomized, double-blind, placebo controlled Phase IIb study to explore the efficacy and safety of STL303 capsules in IgAN patients. About 15 patients dignosed with primary IgAN will be enrolled and randomized to three cohorts and take different dosage of STL303 or placebo capsules orally according to protocol.

Descripción general del estudio

Estado

Aún no reclutando

Condiciones

Intervención / Tratamiento

Descripción detallada

This is a multicenter, randomized, double-blind, placebo-controlled study in approximately 15 patients with primary IgA nephropathy (IgAN).

Participants receiving background therapy will be randomized in a 1:1:1 ratio to receive STL303 capsules dose 1, dose 2, or placebo, administered orally once daily.

The study aims to evaluate the efficacy and safety of STL303 in patients with primary IgAN and to identify the optimal clinical dose.

Tipo de estudio

Intervencionista

Inscripción (Estimado)

15

Fase

  • Fase 2

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Estudio Contacto

  • Nombre: Clinical Operations Manager
  • Número de teléfono: +61 421 585707
  • Correo electrónico: studies@sitala.com

Ubicaciones de estudio

  • Australia
    • Queensland
      • Woolloongabba, Queensland, Australia, 4102
        • Research Site
    • Victoria
      • Clayton, Victoria, Australia, 3168
        • Research Site
      • Saint Albans, Victoria, Australia, 3021
        • Research Site

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

  • Adulto
  • Adulto Mayor

Acepta Voluntarios Saludables

No

Descripción

Inclusion Criteria:

  1. Male and female patients aged 18 years and older, with primary IgAN confirmed by renal biopsy:
  2. eGFR (Chronic Kidney Disease Epidemiology Collaboration [CKD-EPI] formula) greater than or equal to 30 mL/min/1.73 m2 at screening and after completion of run-in.
  3. UPCR greater than or equal to 0.75 g/g at screening and after completion of run-in.
  4. Vaccinated against Neisseria meningitidis and Streptococcus pneumoniae before the first dose.
  5. Have received stable treatment with RASis (ACEi or ARB) at the maximum recommended dose or MTD for at least 90 days prior to the first dose.
  6. If the patient has been treated with SGLT2i, diuretics, other antihypertensive treatments, ERA, and/or hydroxychloroquine for IgAN prior to the first dose, the drug should also be used stably for at least 90 days.

Exclusion Criteria:

  1. Secondary IgAN or unclear exclusion of secondary causes.
  2. Rapidly progressive IgAN (eGFR decline greater than or equal to 50% in 3 months, or less than 50% but at high risk).
  3. Other systemic diseases causing proteinuria/CKD or severe urinary obstruction.
  4. Known or suspected immunodeficiency or hereditary complement deficiency.
  5. Any organ transplant recipients except corneal.
  6. Poorly controlled blood pressure (SBP greater than 150 or DBP great than 90).
  7. Use of immunosuppressive drugs within 90 days or 5 half-lives.
  8. Prior oral budesonide (Nefecon/Tarpeyo/Kinpeygo) within 6 months.
  9. Prior complement inhibitors within 30 days, 5 half-lives, or residual effect period.
  10. Major systemic diseases preventing participation (e.g., NYHA IV, severe pulmonary disease).
  11. Significantly abnormal liver function (greater than 3× ULN enzymes or greater than 2× ULN bilirubin).
  12. QTcF greater than 500 ms.
  13. History of malignancy within 5 years (exceptions apply).
  14. History of meningococcal, pneumococcal, or Hib infection.
  15. Chronic/recurrent infections in past year (e.g., liver abscess, pyelonephritis).
  16. Active systemic infections within 2 weeks or fever greater than 38°C within 7 days.

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Tratamiento
  • Asignación: Aleatorizado
  • Modelo Intervencionista: Asignación paralela
  • Enmascaramiento: Cuadruplicar

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Comparador de placebos: Placebo
Los participantes recibirán placebo.
Droga: Placebo capsule
Placebo arm participants will receive placebo capsules
Experimental: STL303 dose level 1
Participants will receive STL303 dose level 1
Droga: STL303
STL303 arm participants will receive a specific dose of STL303
Experimental: STL303 Dose Level 2
Participants will receive STL303 dose level 2
Droga: STL303
STL303 arm participants will receive a specific dose of STL303

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Treatment emergent adverse events (TEAEs), adverse events (AEs) and serious adverse events (SAEs)
Periodo de tiempo: Adverse events will be closely monitored, and participants will report to the clinic on Days 7, 14, 30, 45, 60, 90, 135 and at end of treatment on Day 180. On Day 210 an End of study safety follow up will also be conducted.
All participants will be observed for any AE during the clinical study, including abnormalities in clinical symptoms and vital signs, physical examination, laboratory tests, and 12-lead ECG. Incidence, severity, and relationship of TEAEs and serious adverse events (SAEs) to STL303. Possible adverse events include: palpitations, nausea, vomiting, dizziness, sore throat, upper respiratory infection, loss of appetite, high temperature, chest discomfort, weakness, rash, headache, lethargy (feeling tired and low on energy) and urinary tract infection.
Adverse events will be closely monitored, and participants will report to the clinic on Days 7, 14, 30, 45, 60, 90, 135 and at end of treatment on Day 180. On Day 210 an End of study safety follow up will also be conducted.

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Change in blood creatinine level
Periodo de tiempo: Blood sampling pre-dose on Days 1 (baseline), 14, 30, 45, 60, 90 and 180
Peripheral blood sampling
Blood sampling pre-dose on Days 1 (baseline), 14, 30, 45, 60, 90 and 180
Change in eGFR slope
Periodo de tiempo: Blood sampling pre-dose on Days 1 (baseline), 14, 30, 45, 60, 90 and 180
Peripheral blood sampling
Blood sampling pre-dose on Days 1 (baseline), 14, 30, 45, 60, 90 and 180
Maximum Concentration at steady-state (Tmax, ss) of STL303
Periodo de tiempo: Pre-dose on Days 1, 7, 14, 60, 90, 135, and 180. On Day 30 pre-dose and at 1 hour (± 5 minutes), 2 hours (± 5 minutes), 4 hours (± 10 minutes), 6 hours (± 10 minutes), 8 hours (± 10 minutes), 12 hours (± 10 minutes), and 24 hours (± 1 hour) after dosing
Measure time to reach maximum concentration at steady-state (Tmax, ss) at steady state.
Pre-dose on Days 1, 7, 14, 60, 90, 135, and 180. On Day 30 pre-dose and at 1 hour (± 5 minutes), 2 hours (± 5 minutes), 4 hours (± 10 minutes), 6 hours (± 10 minutes), 8 hours (± 10 minutes), 12 hours (± 10 minutes), and 24 hours (± 1 hour) after dosing
Maximum plasma concentration at steady-state (Cmax, ss) of STL303
Periodo de tiempo: Pre-dose on Days 1, 7, 14, 60, 90, 135, and 180. On Day 30 pre-dose and at 1 hour (± 5 minutes), 2 hours (± 5 minutes), 4 hours (± 10 minutes), 6 hours (± 10 minutes), 8 hours (± 10 minutes), 12 hours (± 10 minutes), and 24 hours (± 1 hour) after dosing
Measure maximum plasma concentration at steady-state (Cmax, ss) at steady state.
Pre-dose on Days 1, 7, 14, 60, 90, 135, and 180. On Day 30 pre-dose and at 1 hour (± 5 minutes), 2 hours (± 5 minutes), 4 hours (± 10 minutes), 6 hours (± 10 minutes), 8 hours (± 10 minutes), 12 hours (± 10 minutes), and 24 hours (± 1 hour) after dosing
Trough plasma concentration at steady-state of STL303
Periodo de tiempo: Pre-dose on Days 1, 7, 14, 60, 90, 135, and 180. On Day 30 pre-dose and at 1 hour (± 5 minutes), 2 hours (± 5 minutes), 4 hours (± 10 minutes), 6 hours (± 10 minutes), 8 hours (± 10 minutes), 12 hours (± 10 minutes), and 24 hours (± 1 hour) after dosing
Measure trough plasma concentration at steady-state (Cmin, ss /Ctrough, ss),
Pre-dose on Days 1, 7, 14, 60, 90, 135, and 180. On Day 30 pre-dose and at 1 hour (± 5 minutes), 2 hours (± 5 minutes), 4 hours (± 10 minutes), 6 hours (± 10 minutes), 8 hours (± 10 minutes), 12 hours (± 10 minutes), and 24 hours (± 1 hour) after dosing
Area under plasma concentration-time curve for STL303
Periodo de tiempo: Pre-dose on Days 1, 7, 14, 60, 90, 135, and 180. On Day 30 pre-dose and at 1 hour (± 5 minutes), 2 hours (± 5 minutes), 4 hours (± 10 minutes), 6 hours (± 10 minutes), 8 hours (± 10 minutes), 12 hours (± 10 minutes), and 24 hours (± 1 hour) after dosing
Measure the area under the plasma concentration-time curve over one dosing interval at steady state (AUCtau)
Pre-dose on Days 1, 7, 14, 60, 90, 135, and 180. On Day 30 pre-dose and at 1 hour (± 5 minutes), 2 hours (± 5 minutes), 4 hours (± 10 minutes), 6 hours (± 10 minutes), 8 hours (± 10 minutes), 12 hours (± 10 minutes), and 24 hours (± 1 hour) after dosing
Alternative Pathway Activity (Wieslab Assay)
Periodo de tiempo: Pre-dose and post-dose on Day 1 and Day 14; pre-dose on Days 7, 60, 90, 135, and 180; intensive time points (pre-dose, 1, 2, 4, 6, 8, 12, and 24 hours post-dose) on Day 30
Change from baseline in complement alternative pathway (AP) functional activity as measured by the Wieslab assay in serum
Pre-dose and post-dose on Day 1 and Day 14; pre-dose on Days 7, 60, 90, 135, and 180; intensive time points (pre-dose, 1, 2, 4, 6, 8, 12, and 24 hours post-dose) on Day 30
Urinary Complement Biomarker C3a
Periodo de tiempo: Day 1, Day 7 (FMV only), Day 14 (FMV only), Day 30, Day 60, Day 90, Day 135 (FMV only), and Day 180 (all pre-dose)
Change from baseline in urinary levels of C3a, measured in first morning void (FMV) and 24-hour urine samples collected midstream first morning void (FMV) Urine sampling
Day 1, Day 7 (FMV only), Day 14 (FMV only), Day 30, Day 60, Day 90, Day 135 (FMV only), and Day 180 (all pre-dose)
Plasma Soluble Terminal Complement Complex (sC5b-9)
Periodo de tiempo: Day 1 through Day 180 (pre-dose at scheduled visits)
Change from baseline in plasma levels of soluble terminal complement complex (sC5b-9), a marker of terminal complement activation
Day 1 through Day 180 (pre-dose at scheduled visits)
Complement Factor B Cleavage Fragment (Bb)
Periodo de tiempo: Day 1 through Day 180 (pre-dose at scheduled visits)
Change from baseline in plasma levels of complement factor B cleavage fragment (Bb), a marker of alternative pathway activation
Day 1 through Day 180 (pre-dose at scheduled visits)
Change from baseline urine protein-to-creatinine ratio (UPCR)
Periodo de tiempo: 24-hour urine collection pre-dose on Days 1 (baseline), 30, 60, 90 and 180
Change in baseline 24-hour urine collection
24-hour urine collection pre-dose on Days 1 (baseline), 30, 60, 90 and 180
Change in UPCR
Periodo de tiempo: 24-hour urine collection pre-dose on Days 1 (baseline), 30, 60 and 90
Change in baseline 24-hour urine collection
24-hour urine collection pre-dose on Days 1 (baseline), 30, 60 and 90
Change in urine albumin-to-creatinine ratio (UACR)
Periodo de tiempo: 24-hour urine collection pre-dose on Days 1 (baseline), 30, 60, 90 and 180
Change in baseline 24-hour urine collection
24-hour urine collection pre-dose on Days 1 (baseline), 30, 60, 90 and 180
Change urine protein excretion (UPE),
Periodo de tiempo: 24-hour urine collection pre-dose Days 1 (baseline), 30, 60, 90 and 180
Change in baseline 24-hour urine collection
24-hour urine collection pre-dose Days 1 (baseline), 30, 60, 90 and 180

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Sitala Bio LTD

Investigadores

  • Investigador principal: Eugenia Pedagogos, Western Health (Sunshine Hospital)

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Estimado)

1 de junio de 2026

Finalización primaria (Estimado)

1 de julio de 2027

Finalización del estudio (Estimado)

1 de septiembre de 2027

Fechas de registro del estudio

Enviado por primera vez

7 de mayo de 2026

Primero enviado que cumplió con los criterios de control de calidad

18 de mayo de 2026

Publicado por primera vez (Actual)

26 de mayo de 2026

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

28 de mayo de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

24 de mayo de 2026

Última verificación

1 de mayo de 2026

Más información

Términos relacionados con este estudio

Palabras clave

Otros números de identificación del estudio

  • STL303-201

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Descripción del plan IPD

Individual participant data (IPD) will not be shared because participant consent and ethics approvals do not permit public data sharing. A clinical study report will be prepared at the end of the study and result will be shared with research sites and investigators will be able to discuss results with participants if needed.

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

producto fabricado y exportado desde los EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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