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Fase I-utprøving av en undersøkende medisin mot kopper

9. september 2026 oppdatert av: SIGA Technologies

En fase I randomisert, dobbeltblind, crossover, utforskende studie av farmakokinetikken til en enkelt oral dose av form I versus form V kapsler av anti-ortopoksvirusforbindelsen ST-246® i matet normale friske frivillige

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.

Studieoversikt

Detaljert beskrivelse

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.

Studietype

Intervensjonell

Registrering (Faktiske)

12

Fase

  • Fase 1

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

    • Florida
      • Orlando, Florida, Forente stater, 32809
        • Orlando Clinical Research Center

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 50 år (Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

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

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Crossover-oppdrag
  • Masking: Trippel

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / 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).

Andre navn:
  • 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.

Andre navn:
  • 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).

Andre navn:
  • 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.

Andre navn:
  • Tecovirimat

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Pharmacokinetic Parameters for a Single Dose of ST-246 Form I vs. Form V: t½
Tidsramme: 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
Tidsramme: 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-∞
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
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
Tidsramme: 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

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Etterforskere

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

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. august 2008

Primær fullføring (Faktiske)

1. oktober 2008

Studiet fullført (Faktiske)

1. oktober 2008

Datoer for studieregistrering

Først innsendt

1. august 2008

Først innsendt som oppfylte QC-kriteriene

5. august 2008

Først lagt ut (Antatt)

6. august 2008

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

1. oktober 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

9. september 2026

Sist bekreftet

1. september 2010

Mer informasjon

Begreper knyttet til denne studien

Andre studie-ID-numre

  • SIGA-246-005
  • HHSN266200600014C (Annet stipend/finansieringsnummer: NIAID)

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