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En undersøgelse til evaluering af farmakokinetik og sikkerhed af XEMBIFY versus Gamunex-C hos deltagere med kronisk inflammatorisk demyeliniserende polyradikuloneuropati (XPERT)

9. november 2026 opdateret af: Grifols Therapeutics LLC

Et åbent, multicenterstudie til evaluering af farmakokinetik og sikkerhed af XEMBIFY versus Gamunex-C hos deltagere med kronisk inflammatorisk demyeliniserende polyradikuloneuropati

The main goal of the study is to find out whether XEMBIFY, given once a week under the skin, provides similar levels of immunoglobulin G in the blood over time as Gamunex-C, which is given into a vein once every 3 weeks in people with CIDP.

Participants with CIDP will first have up to 28 days of screening to make sure they can join the study. Those who qualify will then start a 19-week treatment period with Gamunex-C. During this period, they will receive Gamunex-C through a vein once every 3 weeks, for a total of 7 doses. Approximately, one week after their last Gamunex-C dose, they will begin a 16-week treatment period with XEMBIFY under the skin, once a week for a total of 16 doses. Blood samples will be collected during both treatment periods to measure IgG level in the blood.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

40

Fase

  • Fase 3

Kontakter og lokationer

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

Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

    • California
      • Rancho Mirage, California, Forenede Stater, 92270
    • Florida
      • Coral Springs, Florida, Forenede Stater, 33155
      • Miami, Florida, Forenede Stater, 33067
        • Trukket tilbage
        • GC2402 Study Site 105
      • Port Charlotte, Florida, Forenede Stater, 33952
    • New York
      • New York, New York, Forenede Stater, 10003
    • North Carolina
      • Fayetteville, North Carolina, Forenede Stater, 28304
    • Tennessee
      • Cordova, Tennessee, Forenede Stater, 38018
    • Texas
      • Houston, Texas, Forenede Stater, 77074
      • Sherman, Texas, Forenede Stater, 75092
      • Târgu Mureş, Rumænien, 540140
      • Hradec Králové, Tjekkiet, 50002

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

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Have typical CIDP or a CIDP variant according to the 2021 criteria established by the European Academy of Neurology/Peripheral Nerve Society (EAN/PNS). The level of diagnostic certainty may be CIDP or possible CIDP.
  • Participants ≤ 90 kg in body weight and requiring an IGIV dose equivalent to 0.3-1.0 g/kg every three weeks (Q3W) inclusive and between 20-90 g of IGIV Q3W inclusive.
  • Clinically stable on IGIV, defined as no recent change in CIDP treatment or experienced a CIDP relapse requiring treatment, within 12 weeks prior to Screening and through baseline visit.

Exclusion Criteria:

  • Diagnosis of polyneuropathy of any other cause (including multifocal motor neuropathy; monoclonal gammopathy of uncertain significance with anti-myelin-associated glycoprotein IgM antibodies; hereditary demyelinating neuropathy; polyneuropathy, organomegaly, endocrinopathy, monoclonal protein and skin changes syndrome; lumbosacral radiculoplexus neuropathy; polyneuropathy associated with diabetes mellitus; polyneuropathy associated with systemic illnesses; or drug or toxin induced polyneuropathy).

  • Severe diseases and conditions that are likely to interfere with evaluation of the study product or satisfactory conduct of the study such as the following:

    1. current malignancy or history of allogeneic bone marrow/stem cell transplant,
    2. cardiac insufficiency (New York Heart Association classes III/IV), cardiomyopathy, significant cardiac arrhythmia requiring treatment, unstable or advanced ischemic heart disease, congestive heart failure or severe hypertension
    3. chronic kidney disease stage IV or V
    4. an acquired medical condition that is known to cause secondary immune deficiency, such as chronic lymphocytic leukemia, lymphoma, multiple myeloma, chronic or recurrent neutropenia (absolute neutrophil count less than 1000/µL [1.0 × 10^9/L]), or human immunodeficiency virus (HIV) infection/acquired immune deficiency syndrome
    5. known bleeding disorders
    6. severe skin disease at the planned injection sites
    7. alcohol, drug or medication abuse, or
    8. other disorders where IGSC therapy would be contraindicated during the study.
  • History of a thrombotic episode (including deep vein thrombosis, known hypercoagulable state, myocardial infarction, pulmonary embolism, or thromboembolic stroke)

  • Known allergic or other severe adverse reactions to blood products including intolerability to previous IVIG up to 1 g/kg Q3W, history of hemolysis after IVIG infusion, aseptic meningitis, recurrent severe headache, hypersensitivity, or severe generalized skin reaction

  • Has had a CIDP relapse requiring treatment modification within 12 weeks prior to Screening or between Screening and baseline visit

  • Treatment with any of the following:

    1. alemtuzumab or rituximab within 12 months of Screening.
    2. cyclophosphamide, interferon, tumor necrosis factor-alpha inhibitors, fingolimod, or fragment crystallizable receptor (FCRn) blockers, within six months of Screening
    3. plasma exchange or complement inhibitors within three months of Screening.
    4. changes to the following treatment within three months of Screening: methotrexate, azathioprine, or mycophenolate or any other immunosuppressants within six months of Screening
    5. participants on corticosteroids ≥ 20 mg/day prednisone equivalent. Participants on low dose corticosteroids (< 20 mg/day prednisone equivalent) may be enrolled if dose has been stable over the last three months prior to Screening and the dosage is not likely to be adjusted during the duration of the trial (inhaled or topical corticosteroids are allowed).
  • Participants requiring an IGIV dose equivalent to:

    1. greater than 1.0 g/kg every three weeks (Q3W) or
    2. less than 0.3 g/kg Q3W or
    3. greater than 90 g of IGIV Q3W or
    4. less than 20 g of IGIV Q3W.
  • Known IgA deficient patients with known antibodies against IgA

  • Known significant proteinuria (≥ 3+ or known urinary protein loss >1 g/24 hours or nephrotic syndrome), acute renal failure, are on dialysis, and/or have severe renal impairment on Screening laboratory testing (blood urea nitrogen [BUN] > 3 times the upper limit of normal [ULN] or creatinine more than 1.5 times ULN).

  • Screening values of aspartate aminotransferase (AST) or alanine aminotransferase (ALT) levels exceeding ≥ 2.5 times the ULN for the expected normal range for the testing laboratory.

  • Hemoglobin levels < 10 g/dL at Screening.

  • Current administration of anti-coagulation therapy which would make IGSC administration inadvisable per investigator judgement (i.e., vitamin K antagonists, nonvitamin K antagonist oral anticoagulants [e.g., dabigatran etexilate targeting Factor IIa, rivaroxaban, edoxaban, and apixaban targeting Factor Xa], and parenteral anticoagulants [e.g., fondaparinux]).

  • Known hyperviscosity syndrome.

  • Known HIV, chronic hepatitis B virus (HBV), or chronic hepatitis C virus (HCV) infection.

  • Participation in another clinical trial within 30 days or if known, 5 half-lives of the interventional product prior to Screening (observational studies without investigative treatments [non-interventional] are permitted).

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: Ikke-randomiseret
  • Interventionel model: Sekventiel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Gamunex-C (IGIV-C 10%)

During the IV Phase, participants will receive Gamunex-C 1 g/kg, up to a maximum dose of 90 g, every 3 weeks for a total of seven doses. Gamunex-C may be administered over 1 day or divided into 2 consecutive daily doses of 0.5 g/kg each, except for dose #6, which will be administered as a single 1g/kg dose.

Immune Globulin Injection (Human), 10% Caprylate/Chromatography Purified (IGIV-C 10%)

Eksperimentel: Xembify (IGSC 20%)

Approximately 7 to 10 days after the last Gamunex-C dose, participants will enter a 16-week SC Phase, where they will receive XEMBIFY 0.456 g/kg once weekly for a total of 16 doses, up to a maximum dose of 41 g.

Immune Globulin Subcutaneous (Human), 20% Caprylate/Chromatography Purified (IGSC 20%)

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
AUC i IV-fasen: Steady-state areal under koncentration-tid-kurven (AUC) for total IgG over en 3-ugers intravenøs doseringsinterval (τ) (dvs. AUC(0-21 dage) hos deltagere med CIDP
Tidsramme: Uge 1 til 19 af IV-fasen
Uge 1 til 19 af IV-fasen
AUC i SC-fasen: AUC i steady-state for total IgG over en ugentlig SC-dosering interval (τ) (dvs. AUC(0-7 dage)) hos deltagere med CIDP
Tidsramme: Uge 1 til 16 af SC-fasen
Uge 1 til 16 af SC-fasen

Sekundære resultatmål

Resultatmål
Tidsramme
Steady-state gennemsnitlig trough (præ-dosis) koncentration af total IgG efter IV administration af Gamunex-C 10% hver 3. uge og SC administration af Xembify 20% en gang ugentligt
Tidsramme: Dag 1 gennem afslutningsbesøg (cirka 35 uger)
Dag 1 gennem afslutningsbesøg (cirka 35 uger)

Samarbejdspartnere og efterforskere

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

Sponsor

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)

2. april 2026

Primær færdiggørelse (Anslået)

31. december 2027

Studieafslutning (Anslået)

31. december 2027

Datoer for studieregistrering

Først indsendt

9. april 2026

Først indsendt, der opfyldte QC-kriterier

17. april 2026

Først opslået (Faktiske)

20. april 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

10. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

9. november 2026

Sidst verificeret

1. november 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • GC2402

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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