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A Study to Determine the Safety and Efficacy of NT-501 With M-CHFM

30 de outubro de 2026 atualizado por: Neurotech Pharmaceuticals

A Multicenter Study to Determine the Safety and Efficacy of NT-501 Utilizing the Medica Membrane in Macular Telangiectasia Type 2 (MacTel), Including a Randomized Comparative Expansion Cohort

The overall purpose of this global, multicenter, two cohort, central image evaluator masked study is to characterize the clinical safety and efficacy of NT-501 manufactured using the Medica - Clinical Hollow Fiber Membrane (M-CHFM) for the treatment of MacTel and to evaluate whether its safety profile and efficacy are comparable to those of NT-501 manufactured using the Clinical Hollow Fiber Membrane (CHFM).

Visão geral do estudo

Status

Recrutamento

Condições

Intervenção / Tratamento

Descrição detalhada

This Phase 3 study consists of two cohorts:

  • Cohort 1 (Extension): Includes participants previously enrolled under the original protocol who received NT-501 (M-CHFM) and will continue follow-up. Participants will undergo evaluations of safety and efficacy from pre-surgery through month 24 or in the event of NT-501 explantation for any reason.
  • Cohort 2 (Expansion): Includes newly enrolled participants randomized 1:1 to receive either NT-501 (M-CHFM) or NT-501 (CHFM). Participants will undergo evaluations of safety and efficacy from pre-surgery through month 12 or in the event of NT-501 explantation for any reason.

Tipo de estudo

Intervencional

Inscrição (Estimado)

60

Estágio

  • Fase 3

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Locais de estudo

      • East Melbourne, Austrália
      • Perth, Austrália
        • Recrutamento
        • Lion's Eye Institute
        • Contato:
        • Investigador principal:
          • Ian Constable, MD
      • Sydney, Austrália
        • Ainda não está recrutando
        • Sydney Eye Hospital
        • Contato:
        • Investigador principal:
          • Elisa Cornish, MD
    • California
      • Walnut Creek, California, Estados Unidos, 94598
        • Ativo, não recrutando
        • Bay Area Retina Associates, A Medical Group
    • Michigan
      • Grand Rapids, Michigan, Estados Unidos, 49546
        • Ativo, não recrutando
        • Foundation for Vision Research
    • Texas
      • Bellaire, Texas, Estados Unidos, 77401
        • Ativo, não recrutando
        • Retina Consultants of Texas

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

21 anos a 80 anos (Adulto, Adulto mais velho)

Aceita Voluntários Saudáveis

Não

Gêneros Elegíveis para o Estudo

Tudo

Descrição

Inclusion Criteria

To participate in this study, the potential subject and at least 1 of their eyes must meet all of the following criteria:

  1. Subjects must have a positive diagnosis of MacTel with evidence of fluorescein leakage typical of MacTel and at least one of the other features that include hyperpigmentation that is outside of a 500-micron radius from the center of the fovea, retinal opacification, crystalline deposits, right-angle vessels, or inner/outer lamellar cavities seen clinically or on SD-OCT.
  2. Subject must have a break in the ellipsoid zone (EZ) (area of IS/OS loss) as measured by SD-OCT between 0.16 and 2.00 millimeters squared.
  3. Subject's best-corrected visual acuity (BCVA) is 54-letter score or better (20/80 or better) as measured by the Early Treatment Diabetic Retinopathy Study (ETDRS) chart at screening.
  4. Subject must have steady fixation in the foveal or parafoveal area and sufficiently clear media for good quality retinal imaging.
  5. Subject must be greater than or equal to 21 years of age and less than 80 years of age at screening.
  6. Subject or their legally authorized representative must be able to provide written informed consent to participate in the study, in accordance with the International Conference on Harmonisation Good Clinical Practices guidelines, and local regulations, before initiating any study-related procedures.

Exclusion Criteria

To participate in this study, the potential subject must not meet any of the following criteria. The ocular exclusion criteria are related to the study eye (unless indicated for either eye):

  1. Subject is medically unable to comply with study procedures or follow-up visits.
  2. Subject received intravitreal steroid therapy for non-neovascular MacTel within the last 3 months.
  3. Subject has ever received intravitreal anti-vascular endothelial growth factor (VEGF) therapy in the study eye OR has, within the past 3 months, received intravitreal anti-VEGF therapy in the fellow eye at randomization.
  4. Subject has evidence of ocular disease other than MacTel that, in the judgment of the examining physician, may confound the diagnosis, procedures, or outcome of the study (e.g., uncontrolled glaucoma, severe non-proliferative or proliferative diabetic retinopathy, uveitis).
  5. Subject has a chronic requirement (e.g., ≥ 4 weeks at a time) for ocular medications and/or has a diagnosed disease that, in the judgment of the examining physician, may be vision threatening or may affect the primary outcome (artificial tears are permitted). The exceptions to this exclusion criteria include artificial tears or one glaucoma medication for early or intermediate primary open-angle glaucoma.
  6. Subject has evidence of intraretinal neovascularization or subretinal neovascularization (SRNV), as evidenced by hemorrhage, hard exudate, subretinal fluid or intraretinal fluid in either eye.
  7. Subject has evidence of intraretinal hyperreflectivity by OCT.
  8. Subject has evidence of central serous chorio-retinopathy in either eye.
  9. Subject has evidence of pathologic myopia in either eye.
  10. Subject has significant corneal or media opacities in either eye.
  11. Subject has had a vitrectomy, penetrating keratoplasty, trabeculectomy, or trabeculoplasty.
  12. Subject has any of the following lens opacities: cortical opacity > standard 3, posterior subcapsular opacity > standard 2, or a nuclear opacity > standard 3 as measured on the Age -Related Eye Disease Study (AREDS) clinical lens grading system.
  13. Subject has undergone lens removal in the previous 3 months or YAG laser within 4 weeks.
  14. Previous participation in any Neurotech MacTel clinical trial unless the participant: (1) previously consented and screened for a MacTel study but was a screen failure solely due to insufficient lesion size; or (2) has completed participation in the prior Neurotech MacTel study, is not actively enrolled in another Neurotech MacTel study, and has an eligible study eye that was not the study eye in the previous trial.
  15. Subject was a participant in any other ocular related or ocular impacted clinical trial of an intervention (drug or device) within the last 6 months.
  16. Subject is on chemotherapy.
  17. Subject is pregnant or breastfeeding.
  18. Subject has a history of malignancy that would compromise the 12-month study survival.
  19. Subject with a history of ocular herpes virus in either eye.
  20. Subject has, in the opinion of the investigator, any physical or mental condition that would increase the risk of participation in the study or may interfere with the study procedures, evaluations, and outcome assessments.
  21. Subject has evidence of subfoveal RPE hyperplasia.

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Solteiro

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Cohort 1 (Extension) - M-CHFM

Previously enrolled Cohort 1 participants received M-CHFM and will undergo evaluations of safety and efficacy from pre-surgery through month 24 or in the event of NT-501 explantation for any reason.

Single implantation of NT-501 manufactured using the Medica - Clinical Hollow Fiber Membrane (M-CHFM)

Experimental: Cohort 2 (Expansion) - M-CHFM

Participants are randomized 1:1 to receive M-CHFM. Participants will undergo evaluations of safety and efficacy from pre-surgery through month 12 or in the event of NT-501 explantation for any reason.

Single implantation of NT-501 manufactured using the Medica - Clinical Hollow Fiber Membrane (M-CHFM)

Comparador Ativo: Cohort 2 (Expansion) - CHFM

Participants are randomized 1:1 to receive CHFM (US commercially available ENCELTO). Participants will undergo evaluations of safety and efficacy from pre-surgery through month 12 or in the event of NT-501 explantation for any reason.

Single implantation of NT-501 manufactured using the Clinical Hollow Fiber Membrane (CHFM)

Outros nomes:
  • Encelto

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Cohort 1 (Extension) - Efficacy
Prazo: Baseline to 24 months

Rate of change in EZ area loss as measured by en face imaging by Spectral-Domain Optical Coherence Tomography (SD-OCT) in the study eye of NT-501 in participants who received NT-501 with M-CHFM

Baseline to 24 months
Cohort 2 (Expansion) - Efficacy
Prazo: Baseline to 12 months

Rate of change in EZ area loss as measured by en face imaging by Spectral-Domain Optical Coherence Tomography (SD-OCT) in the study eye of NT-501 in participants who received NT-501 with M-CHFM as compared to NT-501 with CHFM

Baseline to 12 months

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Cohort 1 (Extension) - Safety
Prazo: Baseline to 24 months

Incidence of ocular and non-ocular adverse events (AEs) and serious adverse events (SAEs)

Baseline to 24 months
Cohort 2 (Expansion) - Safety
Prazo: Baseline to 12 months

Incidence of ocular and non-ocular adverse events (AEs) and serious adverse events (SAEs)

Baseline to 12 months
Cohort 1 (Extension) - Best Corrected Visual Acuity
Prazo: Baseline to 24 months

Percentage of participants with a loss of 15 letters or more in best-corrected visual acuity (BCVA) using the Early Treatment Diabetic Retinopathy Study (ETDRS) distance chart

Baseline to 24 months
Cohort 2 (Expansion) - Best Corrected Visual Acuity
Prazo: Baseline to 12 months

Percentage of participants with a loss of 15 letters or more in best-corrected visual acuity (BCVA) using the Early Treatment Diabetic Retinopathy Study (ETDRS) distance chart

Baseline to 12 months

Outras medidas de resultado

Medida de resultado
Descrição da medida
Prazo
Cohort 1 (Extension) - Aqueous CNTF
Prazo: Month 12 - Month 24

Either a binary result (present/absent) for measurable CNTF or actual CNTF concentration

Month 12 - Month 24
Cohort 2 (Expansion) - Aqueous CNTF
Prazo: Baseline to 12 months

Either a binary result (present/absent) for measurable CNTF or actual CNTF concentration

Baseline to 12 months

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Investigadores

  • Cadeira de estudo: Thomas Aaberg, Jr., MD, Neurotech Pharmaceuticals

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Real)

6 de março de 2025

Conclusão Primária (Estimado)

1 de maio de 2028

Conclusão do estudo (Estimado)

24 de julho de 2028

Datas de inscrição no estudo

Enviado pela primeira vez

29 de abril de 2024

Enviado pela primeira vez que atendeu aos critérios de CQ

29 de abril de 2024

Primeira postagem (Real)

2 de maio de 2024

Atualizações de registro de estudo

Última Atualização Postada (Real)

3 de novembro de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

30 de outubro de 2026

Última verificação

1 de outubro de 2026

Mais Informações

Termos relacionados a este estudo

Outros números de identificação do estudo

  • NTMT-03C

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

NÃO

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Sim

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Sim

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