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A Study to Confirm Efficacy of a Single Dose of Baloxavir Marboxil in the Post-exposure Prophylaxis (PEP) of Influenza Virus Infection in Chinese Participants (Pearlstone)

15. september 2026 opdateret af: Hoffmann-La Roche

A Phase III, Randomized, Double-blinded, Placebo-controlled Study to Confirm Efficacy of a Single Dose of Baloxavir Marboxil in the Post-exposure Prophylaxis of Influenza Virus Infection in Chinese Participants

The main purpose of the study is to evaluate the efficacy of a single dose of baloxavir marboxil compared with placebo in the PEP of influenza virus infection with respect to symptomatic, laboratory-confirmed influenza in participants who are household contacts (HHCs) of participants with influenza (index participants).

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

325

Fase

  • Fase 3

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

  • Navn: Fastest response: use the inquiry form https://www.gene.com/contact-us/submit-medical-inquiry

Undersøgelse Kontakt Backup

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Barn
  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

Index Participants (Participants With Influenza Virus Infection):

  • First participant in a household with influenza virus infection in the current influenza season
  • Fewer than 6 HHCs
  • Agreement by all household members to participate in the study and comply with the study protocol for the duration of the study
  • Diagnosed as having influenza with positive rapid influenza diagnostic test (RIDT) or polymerase chain reaction (PCR) result
  • Onset of symptoms within 48 hours or less at time of signing Informed Consent Form (ICF)/Assent Form
  • PCR (-) or antigen test (-) for severe acute respiratory virus-coronavirus 2 (SARS-CoV-2) using point-of-care or local laboratory test

HHCs of Index Participants:

  • Lived with the index participant for 48 hours or more prior to informed consent/assent
  • Meet all the following criteria and are judged not to have influenza virus infection by the investigator: body temperature (tympanic) <37.5 degrees Celsius (°C); no influenza-like symptoms (cough, sore throat, headache, nasal discharge/nasal congestion, feverishness or chills, muscle or joint pain, or fatigue) at screening; negative RIDT or PCR result for influenza
  • For participants 12 years of age or older, ability to evaluate influenza symptoms by using a participant influenza symptoms diary; For participants under 12 years of age, capability of parents/caregivers to evaluate influenza symptoms by using a participant influenza symptoms diary
  • PCR (-) or antigen test (-) for SARS-CoV-2 using point-of-care or local laboratory test

Exclusion Criteria:

HHCs of Index Participants:

  • Diagnosed with influenza during the current influenza season
  • Unable to live with the index patient from screening until Day 10
  • Live with a household member who has any influenza-like symptom(s) other than the index participant on the day of screening
  • Live with household members other than the index participant who was diagnosed with or strongly suspected to have influenza during the current influenza season
  • Have any underlying diseases requiring systemic (oral or injection), or nasal treatment of antipyretics/analgesics, corticosteroids, or immunosuppressive agents
  • Immunocompromised
  • Use of any medications with anti-influenza effect within 30 days prior to screening
  • Known allergy and/or history of significant intolerance against baloxavir marboxil
  • Exposure to an investigational drug within 30 days or 5 half-lives of the drug prior to screening, whichever is longer

Note: Other protocol-defined inclusion/exclusion criteria may apply

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Tredobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Baloxavir Marboxil
HHCs will receive baloxavir marboxil according to their body weight as outlined in the protocol.
Baloxavir marboxil will be administered to the HHCs as per the schedule specified in the protocol.
Andre navne:
  • Xofluza; RO7191686
Placebo komparator: Placebo
HHCs will receive baloxavir marboxil matching placebo according to their body weight as outlined in the protocol.
Baloxavir marboxil matching placebo will be administered to the HHCs as per the schedule specified in the protocol.
Ingen indgriben: No Intervention
Index participants will not receive any study treatment but will continue to receive SOC treatment for influenza, as per the local guidelines.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
Percentage of Participants who are Infected With Influenza Virus (Reverse Transcription - Polymerase Chain Reaction [RT-PCR] Positive), and Present With Fever and at Least one Respiratory Symptom
Tidsramme: From Day 1 up to Day 10
From Day 1 up to Day 10

Sekundære resultatmål

Resultatmål
Tidsramme
Percentage of Participants who are Infected With Influenza Virus (RT-PCR Positive), and Present With Fever or at Least one Influenza Symptom (Respiratory or Systemic)
Tidsramme: From Day 1 up to Day 10
From Day 1 up to Day 10
Percentage of Participants who are Infected With Influenza Virus (RT-PCR Positive) Regardless of Body Temperature or Influenza Symptoms
Tidsramme: From Day 1 up to Day 10
From Day 1 up to Day 10
Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs)
Tidsramme: Up to Day 21
Up to Day 21

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Studieleder: Clinical Trials, Hoffmann-La Roche

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

22. september 2026

Primær færdiggørelse (Anslået)

30. april 2027

Studieafslutning (Anslået)

30. april 2027

Datoer for studieregistrering

Først indsendt

15. september 2026

Først indsendt, der opfyldte QC-kriterier

15. september 2026

Først opslået (Faktiske)

18. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

18. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • YV46459

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

For eligible studies, qualified researchers may request access to individual patient level clinical data. See Roche's commitment to transparency of clinical study information here: https://go.roche.com/data_sharing.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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