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Acalabrutinib Maleate and Bortezomib for Patients With HLA Antibodies (AB-HLA-2026)

7. juni 2026 opdateret af: Xuefeng He, The First Affiliated Hospital of Soochow University

Acalabrutinib Maleate Monotherapy or in Combination With Bortezomib for Eliminating HLA Antibodies in Patients With Hematologic Malignancies and Platelet Transfusion Refractoriness: a Multicenter, Randomized Controlled Study

Platelet transfusion refractoriness (PTR) is a common complication in patients with hematological malignancies. It not only prolongs the duration of platelet transfusion dependence and significantly increases the risk of bleeding, but is also strongly associated with graft failure and reduced survival after transplantation. HLA class I antibody-mediated alloimmunization is recognized as the most important immunological cause of PTR. HLA antibodies are directly secreted by plasma cells, which are derived from B cells. Therefore, targeting B cells to reduce antibody production is a crucial step in eliminating HLA antibodies. Bruton's tyrosine kinase (BTK) is expressed throughout B cell development from the pre-B cell stage to maturity and supports B cell development, maturation, survival, proliferation, and antibody production by acting as a downstream kinase in the B cell receptor signaling pathway. Bortezomib, a proteasome inhibitor, can selectively induce apoptosis in long-lived plasma cells. The investigators' preliminary exploratory use of a BTK inhibitor in the treatment of PTR with HLA antibodies significantly reduced the mean fluorescence intensity (MFI) of HLA antibodies, improved platelet transfusion outcomes, and demonstrated a favorable safety profile. Based on these findings, the investigators are conducting a prospective, multicenter, randomized controlled two-arm study to investigate the efficacy and safety of acalabrutinib and bortezomib in eliminating HLA antibodies in hematological malignancies patients with PTR.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

42

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

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

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Patients with hematological malignancies and platelet transfusion refractoriness (24-hour CCI < 4.5×10⁹/L or PPR < 20%), and with the highest MFI of HLA antibodies > 8000 ;
  • Age 18-65 years, both male and female;
  • ECOG performance status 0-3;
  • Expected survival > 6 months;
  • Patients must be able to understand and be willing to participate in this study, and sign an informed consent form.

Exclusion Criteria:

  • Hypersensitivity to acalabrutinib, bortezomib, or excipients;
  • Major organ bleeding (central nervous system, lung, intestines) or grade ≥3 bleeding;
  • Hypersplenism;
  • Concurrent use of drugs that may cause excessive platelet consumption (amphotericin B, vancomycin, ATG, interferon, etc.);
  • Disseminated intravascular coagulation, microangiopathic hemolytic anemia;
  • Underlying diseases of vital organs: such as malignant arrhythmia, myocardial infarction, chronic cardiac insufficiency, decompensated liver insufficiency, renal insufficiency, severe coagulation abnormalities, etc.; persistent fever (>38.0°C) for more than 3 days; clinically uncontrolled active infection (including bacterial, fungal, or viral infections), but patients under effective drug therapy are not excluded;
  • Concurrent other progressive malignancies;
  • Patients with cardiac insufficiency: ejection fraction (EF) <30%, NYHA class ≥III cardiac insufficiency;
  • Pregnant or lactating women;
  • Expected survival <60 days;
  • Currently participating in other clinical drug trials.

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: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Arm A
Acalabrutinib maleate monotherapy or in combination with bortezomib
Medicin: Acalabrutinib maleate
100mg twice a day
Medicin: bortezomib
1.3mg/m2, d1,4,8,11
Andet: HLA-matched or crossmatched irradiated platelets
Transfusion HLA-matched or crossmatched irradiated platelets 10U if platelet count lower than 10*109/L
Medicin: human immune globulin
0.4g/kg.d for 5 days
Aktiv komparator: Arm B
Transfusion of HLA-matched or crossmatched irradiated platelets
Andet: HLA-matched or crossmatched irradiated platelets
Transfusion HLA-matched or crossmatched irradiated platelets 10U if platelet count lower than 10*109/L
Medicin: human immune globulin
0.4g/kg.d for 5 days

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
The response rate for anti-HLA antibody clearance
Tidsramme: 4 weeks after intervention
Complete response: HLA antibody MFI decrease ≥30% (applied to HLA antibody loci with baseline MFI >8000; median value used for assessment) Partial response: HLA antibody MFI decrease ≥10% and <30% No response: HLA antibody MFI decrease <10%, or no decrease or even an increase.
4 weeks after intervention
CCI (corrected count increments)
Tidsramme: 4 weeks after intervention
CCI = (platelet increment per ul) x (body surface area in m2)/number of platelets transfused (x 10E11)
4 weeks after intervention
PPR (percentage platelet recovery)
Tidsramme: 4 weeks after intervention
PPR = Post-transfusion platelet count-pre-transfusion platelet count (/L) × total blood volume × 100%
4 weeks after intervention

Sekundære resultatmål

Resultatmål
Tidsramme
The incidence of bleeding events
Tidsramme: The study period (8 weeks after the initiation of intervention)
The study period (8 weeks after the initiation of intervention)
The overall survival rate
Tidsramme: 1 year
1 year

Samarbejdspartnere og efterforskere

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

Sponsor

The First Affiliated Hospital of Soochow University

Efterforskere

  • Ledende efterforsker: Xuefeng He, The First Affiliated Hospital of Soochow University

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.

Generelle publikationer

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)

1. juni 2026

Primær færdiggørelse (Anslået)

1. januar 2029

Studieafslutning (Anslået)

31. maj 2029

Datoer for studieregistrering

Først indsendt

1. juni 2026

Først indsendt, der opfyldte QC-kriterier

7. juni 2026

Først opslået (Faktiske)

9. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

9. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

7. juni 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • XFH2026-05

Plan for individuelle deltagerdata (IPD)

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