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9 september 2026 uppdaterad av: SIGA Technologies

En fas I randomiserad, dubbelblind, crossover, Exploratorisk studie av farmakokinetiken för en enstaka oral dos av form I kontra form V kapslar av anti-ortopoxvirusföreningen ST-246® hos normala friska frivilliga

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.

Studieöversikt

Detaljerad beskrivning

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.

Studietyp

Interventionell

Inskrivning (Faktisk)

12

Fas

  • Fas 1

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

    • Florida
      • Orlando, Florida, Förenta staterna, 32809
        • Orlando Clinical Research Center

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år till 50 år (Vuxen)

Tar emot friska volontärer

Ja

Kön som är behöriga för studier

Allt

Beskrivning

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

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Crossover tilldelning
  • Maskning: Trippel

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Aktiv komparator: 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).

Andra namn:
  • 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.

Andra namn:
  • Tecovirimat
Aktiv komparator: 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).

Andra namn:
  • 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.

Andra namn:
  • Tecovirimat

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Pharmacokinetic Parameters for a Single Dose of ST-246 Form I vs. Form V: t½
Tidsram: 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
Tidsram: 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-∞
Tidsram: 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
Tidsram: 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
Tidsram: 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

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
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
Tidsram: 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

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Utredare

  • Huvudutredare: Thomas C Marbury, MD, Orlando Clinical Research Center

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 augusti 2008

Primärt slutförande (Faktisk)

1 oktober 2008

Avslutad studie (Faktisk)

1 oktober 2008

Studieregistreringsdatum

Först inskickad

1 augusti 2008

Först inskickad som uppfyllde QC-kriterierna

5 augusti 2008

Första postat (Beräknad)

6 augusti 2008

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

1 oktober 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

9 september 2026

Senast verifierad

1 september 2010

Mer information

Termer relaterade till denna studie

Andra studie-ID-nummer

  • SIGA-246-005
  • HHSN266200600014C (Annat bidrag/finansieringsnummer: NIAID)

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

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