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Ensayo de fase I de un medicamento para la viruela en fase de investigación

9 de septiembre de 2026 actualizado por: SIGA Technologies

Un estudio de Fase I aleatorizado, doble ciego, cruzado, exploratorio de la farmacocinética de una dosis oral única de forma I versus cápsulas de forma V del compuesto anti-ortopoxvirus ST-246® en voluntarios normales sanos alimentados

The purpose of this study was to evaluate the pharmacokinetic parameters and safety of a single dose of ST-246 400mg Form I versus ST-246 400mg Form V capsules in fed normal healthy volunteers.

Descripción general del estudio

Descripción detallada

This was a Phase I, double-blind, cross-over, single-dose study of the orally administered anti-orthopoxvirus compound, ST-246, to 12 healthy, fed volunteers between the ages of 18 and 50 years. Subjects were randomized such that 6 subjects received either ST-246 Form I (monohydrate) followed 10 days later after a wash-out period by Form V (hemihydrate), and 6 subjects received ST-246 Form V followed by Form I, as for the previous group.

Both forms of ST-246 were similar in the way they were manufactured. The only difference between Form I and Form V may be related to how it dissolves, and this may affect the way that it is absorbed in the human body. Information about any side-effects that may occur will also be collected in this study.

Tipo de estudio

Intervencionista

Inscripción (Actual)

12

Fase

  • Fase 1

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.

Ubicaciones de estudio

    • Florida
      • Orlando, Florida, Estados Unidos, 32809
        • Orlando Clinical Research Center

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

18 años a 50 años (Adulto)

Acepta Voluntarios Saludables

Sí

Géneros elegibles para el estudio

Todos

Descripción

Inclusion Criteria:

  1. 18 to 50 years
  2. Available for clinical follow-up duration of study.
  3. Able/willing to give written consent.
  4. Good general health; no clinically significant medical history.
  5. Refrain from taking any medications from screening through 72 hours after last dose.
  6. Adequate venous access.
  7. PE and lab results without clinically significant findings within 28 days prior to receipt of drug.
  8. Meet Lab Criteria within 28 days prior to receipt of drug.
  9. Negative pregnancy test
  10. Non smokers
  11. No alcohol or caffeine
  12. Participant or partner has undergone surgical sterilization, or the participant agrees either to be abstinent or use two non-hormonal methods of contraception for duration of the study

Exclusion Criteria:

  1. Marked baseline prolongation of QT/corrected QT interval (QTc) interval (

  2. History of additional risk factors for Torsade de Pointes

  3. Clinically significant abnormal ECG

  4. Personal history of cardiac disease, symptomatic or asymptomatic arrhythmias, syncopal episodes, or prolongation of the PR interval

  5. Family history of Sudden Cardiac Death not clearly due to acute myocardial infarction.

  6. History of any clinically significant conditions including:

    • Asthma
    • Diabetes mellitus
    • History of thyroidectomy or thyroid disease
    • Serious angioedema episodes
    • Head trauma resulting in a diagnosis of TBI other than concussion
    • Seizure or history of seizure
    • Bleeding disorder diagnosed by a doctor or significant bruising or bleeding difficulties with intramuscular injections or blood draws
    • Malignancy
  7. Family history of idiopathic seizures

  8. History or presence of neutropenia or other blood dyscrasia

  9. Known Hepatitis B or Hepatitis C infection

  10. Known human immunodeficiency virus (HIV) or acquired immunodeficiency syndrome illness.

  11. Current or recent history of a clinically significant bacterial, fungal, or mycobacterial infection.

  12. Known clinically significant chronic viral infection (or current clinically significant viral infection

  13. History of frequent or severe headaches or migraines

  14. Known chronic bacterial, mycobacterial, fungal, parasitic, or protozoal infection

  15. Woman who is pregnant or is breast-feeding or planning to become pregnant

  16. On any concomitant medications

  17. History of drug allergy that, in the opinion of the PI, contraindicates participation in the trial.

  18. Inability to swallow medication

  19. Body Mass Index above 35 or below 18,

  20. Current drug abuse or alcohol abuse.

  21. Inability to refrain from physical exercise for a period of 24 hr before and after a PK day or refrain from consuming xanthines, grapefruit or grapefruit juice

  22. Clinically significant lactose intolerance

  23. Received experimental drug within 30 days

  24. Vaccination within 30 days

  25. Total of more than 350 milliliters (mL) of blood drawn in 2 months

  26. Treatment with any immunosuppressant or immunomodulatory medication in 3 months

  27. Any condition occupational reason or other responsibility that, in the judgment of the PI, would jeopardize the safety or rights of a subject participating in the trial or would render the subject unable to comply with the protocol

  28. History or diagnosis that would affect absorption of study medication

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 cruzada
  • Enmascaramiento: Triple

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Comparador activo: Group ST-246 Form I (followed by Form V)

Each of six subjects receive a single oral 400 mg dose (2×200 mg) of ST-246 Form I (monohydrate) in the first intervention period, followed 10 days later (3 days post-treatment monitoring and 7 days wash-out period) in the second intervention period by a single oral 400 mg dose (2×200 mg) of ST-246 Form V (hemihydrate). Both forms of drug are orally administered within 30 minutes after a standard light meal consisting of 400-450 calories and approximately 25% fat.

First Intervention is on Days 1 - 3, and includes 6 patients dosed once orally with ST-246 Form I (Arm 1), and 6 patients dosed once orally with ST-246 Form V (Arm 2).

Otros nombres:
  • Tecovirimat

Second Intervention is on Days 11 - 13 (after a 3 day post-treatment monitoring and 7 day wash-out period) where the 6 patients previously given ST-246 Form I (Arm 1) are now dosed once orally with ST-246 Form V, and the 6 patients previously given ST-246 Form V (Arm 2) are now dosed once orally with ST-246 Form I.

Otros nombres:
  • Tecovirimat
Comparador activo: Group ST-246 Form V (followed by Form I)

Each of six subjects receive a single oral 400 mg dose (2×200 mg) of ST-246 Form V (hemihydrate) in the first intervention period, followed 10 days later (3 days post-treatment monitoring and 7 days wash-out period) in the second intervention period by a single oral 400 mg dose (2×200 mg) of ST-246 Form I (monohydrate). Both forms of drug are orally administered within 30 minutes after a standard light meal consisting of 400-450 calories and approximately 25% fat.

First Intervention is on Days 1 - 3, and includes 6 patients dosed once orally with ST-246 Form I (Arm 1), and 6 patients dosed once orally with ST-246 Form V (Arm 2).

Otros nombres:
  • Tecovirimat

Second Intervention is on Days 11 - 13 (after a 3 day post-treatment monitoring and 7 day wash-out period) where the 6 patients previously given ST-246 Form I (Arm 1) are now dosed once orally with ST-246 Form V, and the 6 patients previously given ST-246 Form V (Arm 2) are now dosed once orally with ST-246 Form I.

Otros nombres:
  • Tecovirimat

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Pharmacokinetic Parameters for a Single Dose of ST-246 Form I vs. Form V: t½
Periodo de tiempo: Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs

Mean terminal half-life (t½; hrs) for Forms I and V were calculated from [plasma] vs time profiles.

Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs
Pharmacokinetic Parameters for a Single Dose of ST-246 Form I vs. Form V: AUC0-τ
Periodo de tiempo: Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs

Area under the drug concentration-time curve from time zero to time t, where t is the last timepoint with a drug concentration ≥ lowest obtainable quantification (AUC0-τ; ng*hr/mL).

Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs
Pharmacokinetic Parameters for a Single Dose of ST-246 Form I vs. Form V: AUC0-∞
Periodo de tiempo: Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs

Area under the drug concentration-time curve from time zero to infinity (AUC0-∞; ng*hr/mL).

Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs
Pharmacokinetic Parameters for a Single Dose of ST-246 Form I vs. Form V: Cmax
Periodo de tiempo: Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs

Maximum drug concentration in plasma, determined directly from individual concentration-time data (Cmax)

Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs
Pharmacokinetic Parameters for a Single Dose of ST-246 Form I vs. Form V: Tmax
Periodo de tiempo: Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs

Time to maximum plasma concentration(Tmax; hrs) for Forms I and V were calculated from [plasma] vs time profiles.

Post-dose samples at 0.5,1,2,3,4,8,12,24,36,48,72 hrs

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Number of Study Participants Who Tolerated a Single Dose of ST-246 Form I vs. Form V as Determined by No Clinically Significant Changes in Safety Parameters
Periodo de tiempo: 4 weeks

Evaluated safety parameters included:

  1. physical examination/vital signs
  2. electrocardiograms (heart rate, PR interval, QRS duration, QT interval, and QTc Bazett)
  3. laboratory safety tests (hematology, chemistry, urinalysis)
  4. adverse events For a), b) and c), summary statistics (mean,SD, median, minm, maxm)for values, and changes from baseline(Day 1 pre-dose) to each timepoint, were measured and compared to laboratory normal reference ranges. Values for a)- d) were assigned grades according to DAIDS AE Grading Table. Any Grade of 3 or higher was considered severe and significant.
4 weeks

Colaboradores e Investigadores

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

Patrocinador

Investigadores

  • Investigador principal: Thomas C Marbury, MD, Orlando Clinical Research Center

Publicaciones y enlaces útiles

La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.

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

1 de agosto de 2008

Finalización primaria (Actual)

1 de octubre de 2008

Finalización del estudio (Actual)

1 de octubre de 2008

Fechas de registro del estudio

Enviado por primera vez

1 de agosto de 2008

Primero enviado que cumplió con los criterios de control de calidad

5 de agosto de 2008

Publicado por primera vez (Estimado)

6 de agosto de 2008

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

1 de octubre de 2026

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

9 de septiembre de 2026

Última verificación

1 de septiembre de 2010

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • SIGA-246-005
  • HHSN266200600014C (Otro número de subvención/financiamiento: NIAID)

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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