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Undersøgelse i pædiatri med HypEREosinofilt syndrom (SPHERE) (SPHERE)

13. april 2026 opdateret af: GlaxoSmithKline

Et fase 3, 52-ugers, åbent enkeltarmsstudie for at undersøge effektiviteten og sikkerheden af ​​Mepolizumab SC hos deltagere i alderen 6 til 17 år med hypereosinofilt syndrom

Formålet med denne undersøgelse er at undersøge effektiviteten og sikkerheden af ​​mepolizumab hos børn og unge med hypereosinofilt syndrom (HES), som modtager standardbehandling (SoC).

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

16

Fase

  • Fase 3

Udvidet adgang

Ikke længere tilgængelig uden for det kliniske forsøg. Se udvidet adgangsregistrering.

Kontakter og lokationer

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

Studiesteder

  • Argentina
      • Buenos Aires, Argentina, C1028AAP
        • GSK Investigational Site

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

6 år til 17 år (Barn)

Tager imod sunde frivillige

Ingen

Beskrivelse

Inklusionskriterier:

  • Deltageren skal være i alderen 6 til 17 år inklusive ved screening (besøg 1).
  • Deltagere, der har været diagnosticeret med HES i mindst 6 måneder før tilmelding (besøg 2).
  • En historie med 2 eller flere HES-udbrud inden for de seneste 12 måneder forud for screening (besøg 1).
  • Deltagerne skal have et eosinofiltal i blodet >=1000 celler pr. mikroliter (/mcL) til stede ved screeningen.
  • Deltagerne skal have en stabil dosis af HES-behandling i de 4 uger forud for den første dosis mepolizumab (besøg 2)
  • Mand og/eller kvinde
  • Underskrevet skriftligt informeret samtykke

Ekskluderingskriterier:

  • Livstruende HES eller livstruende HES-komorbiditeter
  • Andre samtidige medicinske tilstande, der kan påvirke deltagerens sikkerhed
  • Eosinofili af ukendt betydning
  • Fusion tyrosinkinase gentranslokation [FIP1L1- Blodplade-afledt vækstfaktorreceptor (PDGFRα) (F/P)] positivitet
  • Klinisk diagnose af eosinofil granulomatose med polyangiitis (EGPA)
  • Deltagere med kroniske eller vedvarende aktive infektioner, der kræver systemisk behandling, samt deltagere, der har oplevet klinisk signifikante infektioner på grund af vira, bakterier og svampe inden for 4 uger før tilmelding (besøg 2)
  • Deltagere med et allerede eksisterende parasitisk angreb inden for 6 måneder før tilmelding (besøg 2)
  • Deltagere med en kendt immundefekt (f.eks. Humant immundefektvirus [HIV]), bortset fra det, der forklares ved brugen af ​​OCS eller anden behandling, der tages for HES
  • Deltagere med dokumenteret anamnese med enhver klinisk signifikant hjerteskade før screening (besøg 1), som efter investigatorens mening ville påvirke deltagerens deltagelse under undersøgelsen
  • Deltagere med en historie med eller aktuelt lymfom, deltagere med nuværende malignitet eller tidligere kræft i remission i mindre end 12 måneder før screening (besøg 1)
  • Deltagere, der ikke reagerer på OCS baseret på klinisk respons eller eosinofiltal i blodet.
  • Deltagere, der tidligere har modtaget mepolizumab i de 4 måneder forud for tilmelding (besøg 2)
  • Deltagere, der fik ikke-orale systemiske kortikosteroider i den 4-ugers periode forud for tilmelding (besøg 2).
  • Deltagere, der har modtaget andre monoklonale antistoffer inden for 30 dage eller 5 halveringstider, alt efter hvad der er længst, efter tilmelding (besøg 2).
  • Deltagere, der har modtaget behandling med et forsøgsmiddel (biologisk eller ikke-biologisk) inden for de seneste 30 dage eller 5 lægemiddelhalveringstider, alt efter hvad der er længst, før tilmelding (besøg 2).
  • Brug af kandidatvacciner til coronavirus sygdom 2019 (COVID-19), som ikke har modtaget begrænset, accelereret eller fuld autorisation/godkendelse, og som kun er i brug som en del af et klinisk forsøg.
  • Deltagere, der i øjeblikket deltager i enhver anden interventionel klinisk undersøgelse
  • Deltagere med nogen historie med overfølsomhed over for ethvert monoklonalt antistof (inklusive mepolizumab).
  • Bevis for klinisk signifikant abnormitet i den hæmatologiske, biokemiske eller urinanalysescreening fra prøven indsamlet ved screening (besøg 1), som kunne bringe deltagerens sikkerhed i fare ved at deltage i undersøgelsen, som vurderet af investigator

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Mepolizumab 100 mg SC
Participants in the age group of 6 to 11 years with body weight less than (<) 40 kilogram (kg) received Mepolizumab 100 milligram (mg) subcutaneous (SC) injection every 4 weeks over a treatment period of 52 weeks.
Medicin: Mepolizumab
Mepolizumab was provided in pre-filled safety syringe
Eksperimentel: Mepolizumab 300 mg SC
Participants in the age group of 12 to 17 years received Mepolizumab 300 mg SC injection every 4 weeks over a treatment period of 52 weeks.
Medicin: Mepolizumab
Mepolizumab was provided in pre-filled safety syringe
Eksperimentel: Mepolizumab 200/100 mg SC
A participant in the age group of 6 to 11 years with body weight greater than or equal to (>=) 40 kg received mepolizumab 200 mg SC injections every 4 weeks. During the conduct of the study, the mepolizumab dose was reduced to 100 mg SC injection every 4 weeks as body weight of the participant reduced to less than (<) 40 kg over a treatment period of 52 weeks.
Medicin: Mepolizumab
Mepolizumab was provided in pre-filled safety syringe
Eksperimentel: Mepolizumab 200/300 mg SC
A participant in the age group of 6 to 11 years with body weight >=40 kg received mepolizumab 200 mg SC injections every 4 weeks. During the conduct of the study, the mepolizumab dose was increased to 300 mg SC injection every 4 weeks as age of the participant increased to the age group of 12 to 17 years over a treatment period of 52 weeks.
Medicin: Mepolizumab
Mepolizumab was provided in pre-filled safety syringe

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Number of Participants Who Experienced HES Flares Over the 52-Week Study Treatment Period
Tidsramme: Up to Week 52
A HES flare is defined as a HES related clinical manifestation based on a physician-documented change in clinical signs or symptoms (worsening symptoms and/or elevated blood eosinophil level) which resulted in need for either: an increase from the most recent dose in the maintenance Oral Corticosteroid (OCS) dose (prednisone/prednisolone equivalent) by at least 10 mg per day for 5 days or an increase in or addition of any immunosuppressive and/or cytotoxic HES therapy from/to the most recent dose of HES therapy. Data is presented by the number of HES flares (0, 1, 2, 3 ,4 and >=5) in the participants.
Up to Week 52

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Mean Daily Oral Corticosteroids (OCS) Dose (Prednisone/Prednisolone or Equivalent) for Each 4-week Period From Weeks 0-4 to Weeks 48-52
Tidsramme: Baseline (Weeks 0-4), Weeks 4-8, Weeks 8-12, Weeks 12-16, Weeks 16-20, Weeks 20-24, Weeks 24-28, Weeks 28-32, Weeks 32-36, Weeks 36-40, Weeks 40-44, Weeks 44-48 and Weeks 48-52
The mean daily OCS (prednisone or equivalent) dose for each 4-week period from Weeks 0-4 to Weeks 48-52 for each participant were calculated as the sum of the daily doses of OCS during each 4-week period divided by the total number of days. The change in the mean daily OCS dose for each 4-week period from Weeks 0-4 to Weeks 48-52 was calculated for each participant as the mean daily OCS dose for Weeks 48-52 minus the mean daily OCS dose for Weeks 0-4. Baseline value was derived as the sum of the daily doses of OCS during first 4 weeks following the initiation of mepolizumab treatment (Weeks 0-4) divided by total number of days. Change from Baseline was calculated as post-Baseline value minus Baseline Value.
Baseline (Weeks 0-4), Weeks 4-8, Weeks 8-12, Weeks 12-16, Weeks 16-20, Weeks 20-24, Weeks 24-28, Weeks 28-32, Weeks 32-36, Weeks 36-40, Weeks 40-44, Weeks 44-48 and Weeks 48-52
Number of Participants With Reduction of >=50 Percentage (%) in Mean Daily OCS Dose (Prednisone/Prednisolone or Equivalent) for Each 4-week Period From Weeks 0-4 to Weeks 48-52
Tidsramme: Baseline (Weeks 0-4), Weeks 4-8, Weeks 8-12, Weeks 12-16, Weeks 16-20, Weeks 20-24, Weeks 24-28, Weeks 28-32, Weeks 32-36, Weeks 36-40, Weeks 40-44, Weeks 44-48 and Weeks 48-52
The mean daily OCS (prednisone or equivalent) dose for each 4-week period from Weeks 0-4 to Weeks 48-52 for each participant were calculated as the sum of the daily doses of OCS during each period divided by the total number of days. For each 4-week period, a reduction of 50% or more in mean OCS dose was defined as (mean OCS dose at each 4-week period minus mean OCS dose during Weeks 0-4) divided by (mean OCS dose during Weeks 0-4) multiplied by 100 was <= -50. Baseline value was derived as the sum of the daily doses of OCS during first 4 weeks following the initiation of mepolizumab treatment (Weeks 0-4) divided by total number of days.
Baseline (Weeks 0-4), Weeks 4-8, Weeks 8-12, Weeks 12-16, Weeks 16-20, Weeks 20-24, Weeks 24-28, Weeks 28-32, Weeks 32-36, Weeks 36-40, Weeks 40-44, Weeks 44-48 and Weeks 48-52
Number of Participants With a Mean Daily OCS Dose (Prednisone/Prednisolone or Equivalent) of Less Than or Equal to (<=) 7.5 Milligrams (mg) During Weeks 48-52 in Subpopulation of Participants That Were Taking OCS at Baseline
Tidsramme: Weeks 48-52
The mean daily OCS (prednisone or equivalent) dose for Weeks 48-52 for each participant were calculated as the sum of the daily doses of OCS during this period divided by the total number of days. Number of participants with a mean daily OCS dose (prednisone/prednisolone or equivalent) of <=7.5 mg during period of Weeks 48-52 in subpopulation of participants that were taking OCS at Baseline has been presented.
Weeks 48-52
Number of Participants With a Mean Daily OCS Dose (Prednisone/Prednisolone or Equivalent) of <=7.5 mg During Weeks 48-52 in Overall Population
Tidsramme: Weeks 48-52
The mean daily OCS (prednisone or equivalent) dose for Weeks 48-52 for each participant were calculated as the sum of the daily doses of OCS during this period divided by the total number of days. Number of participants with a mean daily OCS dose (prednisone/prednisolone or equivalent) of <=7.5 mg during period of Weeks 48-52 in overall population has been presented.
Weeks 48-52
Change From Baseline in Fatigue Severity Based on Weekly Average Score of Brief Fatigue Inventory (BFI) Item 3 (Worst Level of Fatigue During Past 24 Hours) for Week 52 for Participants in the Age Group of 12 to 17 Years
Tidsramme: Baseline (Week 0) and Week 52
The BFI is a self-administered questionnaire developed to assess fatigue severity. The BFI has 9 items. BFI- Item 3 assesses the worst level of fatigue during the past 24 hours. Participants report their worst level of fatigue daily, for the previous 24 hours, using a numerical rating scale ranging from 0 (no fatigue) to 10 (as bad as you can imagine). The weekly average score of BFI item 3 was defined as the mean of the observed daily assessments over the 7-day period. The weekly average score of BFI item 3 ranges from 0 to 10, higher score indicates worst outcome. BFI Item 3 was assessed in the participants with the age group of 12 to 17 years at study entry. Baseline was defined as the mean of the 7 daily assessments of BFI item 3 up to but not including the date of first dose of study treatment. Change from Baseline was calculated as post-Baseline value minus Baseline Value.
Baseline (Week 0) and Week 52
Number of Participants With Any Time Post-Baseline Positive Anti-mepolizumab Antibodies (ADA)
Tidsramme: Up to Week 52
Serum samples were collected for the determination of anti-mepolizumab antibodies (ADA) using a validated electro-chemiluminescent immunoassay. The assay involved screening, confirmation and titration assays. If serum samples tested positive in the screening assay, they were considered 'potentially positive' and were further analyzed for specificity using the confirmation assay. Samples that confirmed positive in the confirmation assay were reported as 'positive'. Confirmed positive ADA samples were further characterized in the titration assay to quasi-quantitate the amount of ADA in the sample and were also further characterized in the Neutralizing antibody (Nab) assay. A participant was considered positive ADA if they had at least one positive any time post-Baseline ADA result.
Up to Week 52
Number of Participants With Any Time Post-Baseline Positive Neutralizing Antibodies (NAb)
Tidsramme: Up to Week 52
Blood samples were collected for the determination of positive neutralizing antibodies. NAb test was to be carried out on samples that were positive in the confirmatory binding antibody assay. A participant was to be considered positive for NAb if they had at least one positive any time post-Baseline neutralizing antibody result.
Up to Week 52
Ratio to Baseline in Blood Eosinophil Count
Tidsramme: Baseline (Week 0), Weeks 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48 and 52
Blood samples were collected to measure eosinophil count. Ratio to Baseline is defined as post-dose visit value divided by Baseline value. Baseline was defined as the latest blood eosinophil value measured by the central laboratory prior to the first dose of study treatment.
Baseline (Week 0), Weeks 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48 and 52
Plasma Concentrations of Mepolizumab
Tidsramme: Pre-dose at Weeks 4 and 24; Week 52
Blood samples were collected at the indicated time points for pharmacokinetic analysis of Mepolizumab.
Pre-dose at Weeks 4 and 24; Week 52

Samarbejdspartnere og efterforskere

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

Sponsor

GlaxoSmithKline

Efterforskere

  • Studieleder: GSK Clinical Trials, GlaxoSmithKline

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 (Faktiske)

14. juli 2022

Primær færdiggørelse (Faktiske)

28. oktober 2025

Studieafslutning (Faktiske)

28. oktober 2025

Datoer for studieregistrering

Først indsendt

7. juli 2021

Først indsendt, der opfyldte QC-kriterier

7. juli 2021

Først opslået (Faktiske)

16. juli 2021

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

13. april 2026

Sidst verificeret

1. april 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 215360

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

IPD for denne undersøgelse vil blive gjort tilgængelig via webstedet for anmodning om kliniske undersøgelsesdata.

IPD-delingstidsramme

IPD vil blive gjort tilgængelig inden for 6 måneder efter offentliggørelsen af ​​resultaterne af undersøgelsens primære endepunkter, vigtige sekundære endepunkter og sikkerhedsdata.

IPD-delingsadgangskriterier

Adgang gives, efter at et forskningsforslag er indsendt og har modtaget godkendelse fra det uafhængige evalueringspanel, og efter en datadelingsaftale er på plads. Adgangen gives i en indledende periode på 12 måneder, men en forlængelse kan gives, når det er berettiget, i op til yderligere 12 måneder.

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • CSR

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Hypereosinofilt syndrom

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Betingelser

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