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Autoimmune Hemolytic AnemiaPhase 2NCT03538041

A Study of INCB050465 in Participants With Autoimmune Hemolytic Anemia

A Phase 2 study testing Parsaclisib in people with Autoimmune Hemolytic Anemia, run by Incyte Corporation at 12 sites in 4 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The purpose of this study is to evaluate the safety and efficacy of parsaclisib administered orally to participants with autoimmune hemolytic anemia (AIHA) who have decreased hemoglobin and evidence of ongoing hemolysis that requires treatment intervention. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Autoimmune Hemolytic Anemia
What is being tested?
Parsaclisib
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
25 participants
Where
12 sitesin 4 countries
Study dates
21 Nov 2018to 2 Apr 2024
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Diagnosis of AIHA based on the presence of hemolytic anemia and serological evidence of anti-erythrocyte antibodies, detectable by the direct antiglobulin test.
  • Participants who have disease progression after treatment with standard therapies that are known to confer clinical benefit, or who are intolerant to treatment, or who refuse standard treatment. There is no limit to the number of prior treatment regimens.
  • Hemoglobin 7 to 10 g/dL.
  • No evidence of a lymphoproliferative malignancy or other autoimmune-related underlying conditions.
  • Eastern Cooperative Oncology Group performance status of 0 to 2.
  • Willingness to avoid pregnancy or fathering children.

Who cannot join

  • Pregnant or breastfeeding women.
  • Concurrent conditions and history of other protocol-specified diseases.
  • ANC < 1.5 × 10^9/L.
  • Platelet count < 100 × 10^9/L.
  • Severely impaired liver function.
  • Impaired renal function with estimated creatinine clearance less than 45 mL/min.
Show all 11Show fewer
  • Anti-phospholipid antibodies positive or elevated anti-streptolysin antibodies.
  • Positive serology test results for hepatitis B surface antigen or core antibody, or hepatitis C virus antibody with detectable RNA at screening, consistent with active or chronic infection.
  • Known HIV infection or positivity on immunoassay.
  • History or presence of an abnormal ECG that, in the investigator's opinion, is clinically meaningful.
  • Known hypersensitivity or severe reaction to parsaclisib or its excipients.

Trial locations and contacts

12 sites in 4 countries.

12 sites in 4 countries

United States6 sites
  • University Health System Inc., Dba the University of Tn Medical Center

    Knoxville, Tennessee, 37920

  • University of Minnesota

    Minneapolis, Minnesota, 55455

  • Weill Medical College of Cornell University

    New York, New York, 10021

  • Washington University School of Medicine

    St Louis, Missouri, 63110

  • Montefiore Medical Center

    The Bronx, New York, 10467

  • Georgetown University Hospital

    Washington D.C., District of Columbia, 20007

Other trials in United States

Italy3 sites
  • Fondazione Irccs Ca Granda Ospedale Maggiore

    Milan, 20122

  • UNIVERSIT� DI NAPOLI FEDERICO II

    Naples, 80131

  • AZIENDA OSPEDALIERO UNIVERSITARIA MAGGIORE DELLA CARIT� DI NOVARA

    Novara, 28100

Other trials in Italy

France2 sites
  • Centre Hospitalier Universitaire Henri Mondor

    Créteil, 94010

  • Centre Hospitalier Regional Universitaire (Chru) de Lille

    Lille, 59037

Other trials in France

Austria1 site
  • Allgemeines Krankenhaus Der Stadt Wien

    Vienna, 01090

Other trials in Austria

About this study

Official title: A Phase 2, Open-Label Study of INCB050465 in Participants With Autoimmune Hemolytic Anemia

The purpose of this study is to evaluate the safety and efficacy of parsaclisib administered orally to participants with autoimmune hemolytic anemia (AIHA) who have decreased hemoglobin and evidence of ongoing hemolysis that requires treatment intervention.

Being tested
Parsaclisib
Keywords
autoimmune hemolytic anemia, phosphatidylinositol 3-kinase (PI3K) inhibitor
Medical subject headings
Anemia, Hemolytic, Autoimmune, Hereditary Sensory and Autonomic Neuropathies

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ParsaclisibDrug

    Also called INCB050465

    Parsaclisib administered orally.

Study groups in NCT03538041
Study groupRoleWhat they receive
Parsaclisib 1 mg QDExperimentalParsaclisib at 1 milligram (mg) once daily (QD) for 12 weeks followed by extension period, with a dose-increase option (to 2.5 mg QD) at Week 6 for participants who fulfill dose increase criteria.
Receives: Drug: Parsaclisib
Parsaclisib 2.5 mg QDExperimentalParsaclisib at 2.5 mg QD for 12 weeks followed by extension period.
Receives: Drug: Parsaclisib

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Percentage of Participants Attaining a Complete Response at Any Visit From Week 6 to Week 12

    A complete response was defined as hemoglobin >12 grams per deciliter (g/dL) not attributed to a transfusion effect and the normalization of hemolytic markers. No transfusion effect was defined as > 1 week since the last transfusion.

    Measured: Week 6 to Week 12

  2. Percentage of Participants Attaining a Partial Response at Any Visit From Week 6 to Week 12

    A partial response was defined as hemoglobin 10-12 g/dL or at least a 2 g/dL increase from Baseline not attributed to a transfusion effect and the normalization of hemolytic markers. No transfusion effect was defined as > 1 week since the last transfusion.

    Measured: Week 6 to Week 12

  3. Number of Participants With Any Treatment-emergent Adverse Event (TEAE)

    An adverse event (AE) was defined as any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related, that occurred after a participant provided informed consent. Abnormal laboratory values or test results occurring after informed consent constituted AEs only if they induced clinical signs or symptoms, were considered clinically meaningful, required therapy, or required changes in the study drug. Anemia and transfusions should not have been reported as AEs unless they represented a clinically meaningful decrease from Baseline in hemoglobin. A TEAE was defined as any AE either reported for the first time or the worsening of a pre-existing event after the first dose of study drug.

    Measured: up to 1638 days

Secondary outcomes (23)
  1. Percentage of Participants Attaining a Complete Response During Post-Baseline Visits

    A complete response was defined as hemoglobin >12 g/dL) not attributed to a transfusion effect and the normalization of hemolytic markers. No transfusion effect was defined as > 1 week since the last transfusion.

    Measured: up to 1638 days

  2. Percentage of Participants Attaining a Partial Response During Post-Baseline Visits

    A partial response was defined as hemoglobin 10-12 g/dL or at least a 2 g/dL increase from Baseline not attributed to a transfusion effect and the normalization of hemolytic markers. No transfusion effect was defined as > 1 week since the last transfusion.

    Measured: up to 1638 days

  3. Percentage of Participants Attaining a ≥ 2 g/dL Increase in Hemoglobin From Baseline

    Hemoglobin levels were assessed throughout the study.

    Measured: up to 1638 days

  4. Change From Baseline in Hemoglobin

    Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Measured: Baseline; up to 1638 days

  5. Percentage Change From Baseline in Hemoglobin

    Percentage change from Baseline was calculated as: ([post-Baseline value minus the Baseline value] / Baseline value) x 100.

    Measured: Baseline; up to 1638 days

  6. Percentage of Participants Requiring Transfusions

    A participant was defined to have required a transfusion if his or her last transfusion was within 7 days of the visit date.

    Measured: Baseline; up to 1638 days

  7. Percentage of Participants Who Achieved Normalization of Hemoglobin, Haptoglobin, Lactate Dehydrogenase (LDH), Reticulocyte Count, Total Bilirubin, Direct Bilirubin, and Indirect Bilirubin

    Normalization was determined by the Investigator based on normal ranges for the clinical reference laboratory.

    Measured: up to 1638 days

  8. Percentage of Participants Requiring a Prednisone Dose Change (Increase or Decrease)

    Prednisone use was monitored throughout the study.

    Measured: up to 1638 days

  9. Change From Baseline in the Functional Assessment of Chronic Illness Therapy - Fatigue (FACIT-F) Subscale Scores

    The FACIT-F subscale is a 13-item instrument designed to assess fatigue/tiredness and its impact on daily activities and functioning in a number of chronic diseases. Participants were asked to respond to 13 statements that people with the illness have said are important on the following scale: 0, not at all; 1, a little bit; 2, somewhat; 3, quite a bit; 4, very much. Participants were asked to indicate the response as it applied to the last 7 days. The total fatigue subscale score ranges from 0 to 52; a higher score indicates more severe impact on daily activities and functioning.

    Measured: Baseline; up to 1638 days

  10. Mean Cmax of Parsaclisib

    Cmax was defined as the maximum observed concentration. Participants in Cohort 1 were not eligible to receive parsaclisib 2.5 mg at Week 2.

    Measured: predose at Weeks 1 and 12; predose and 1, 2, and 4 hours postdose at Weeks 2 and 8

  11. Mean Tmax of Parsaclisib

    tmax was defined as the time to the maximum concentration. Participants in Cohort 1 were not eligible to receive parsaclisib 2.5 mg at Week 2.

    Measured: predose at Weeks 1 and 12; predose and 1, 2, and 4 hours postdose at Weeks 2 and 8

  12. Mean Cmin of Parsaclisib

    Cmin was defined as the minimum observed concentration over the dose interval. Participants in Cohort 1 were not eligible to receive parsaclisib 2.5 mg at Week 2.

    Measured: predose at Weeks 1 and 12; predose and 1, 2, and 4 hours postdose at Weeks 2 and 8

  13. Mean AUC0-4 of Parsaclisib

    AUC0-4 was defined as the area under the concentration-time curve from time = 0 to 4 hours postdose. Participants in Cohort 1 were not eligible to receive parsaclisib 2.5 mg at Week 2.

    Measured: predose at Weeks 1 and 12; predose and 1, 2, and 4 hours postdose at Weeks 2 and 8

  14. Mean AUC0-t of Parsaclisib

    AUC0-t was defined as the area under the concentration-time curve from time = 0 to the last measureable concentration at time = t. Participants in Cohort 1 were not eligible to receive parsaclisib 2.5 mg at Week 2.

    Measured: predose at Weeks 1 and 12; predose and 1, 2, and 4 hours postdose at Weeks 2 and 8

  15. Mean Clast of Parsaclisib

    Clast was defined as the last measurable concentration (above the quantification limit). Participants in Cohort 1 were not eligible to receive parsaclisib 2.5 mg at Week 2.

    Measured: predose at Weeks 1 and 12; predose and 1, 2, and 4 hours postdose at Weeks 2 and 8

  16. Mean Tlast of Parsaclisib

    Tlast was defined as the time of the last measurable concentration (above the quantification limit). Participants in Cohort 1 were not eligible to receive parsaclisib 2.5 mg at Week 2.

    Measured: predose at Weeks 1 and 12; predose and 1, 2, and 4 hours postdose at Weeks 2 and 8

  17. Change From Baseline in Reticulocyte Count

    Change from Baseline was calculated as the post-Baseline value minus the Baseline value

    Measured: Baseline; up to 1638 days

  18. Change From Baseline in Cardiolipin Immunoglobulin G (IgG) Antibody and Cardiolipin Immunoglobulin M (IgM) Antibody

    Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Measured: Baseline; Week 12

  19. Change From Baseline in Cold Hemagglutinin Levels

    Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Measured: Baseline; Week 12

  20. Change From Baseline in Haptoglobin, Total Bilirubin, Direct Bilirubin, and Indirect Bilirubin

    Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Measured: Baseline; up to 1638 days

  21. Change From Baseline in Lactate Dehydrogenase (LDH)

    Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Measured: Baseline; up to 1638 days

  22. Change From Baseline in CH50

    Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Measured: Baseline; up to 1638 days

  23. Change From Baseline in Complement C3 and Complement C4

    Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

    Measured: Baseline; up to 1638 days

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted25 May 2018
  2. Study start21 Nov 2018
  3. Primary completion5 Aug 2021
  4. Study completion2 Apr 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
25 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03538041
Sponsor's protocol ID
INCB 50465-206
Other IDs
Parsaclisib, 2017-003652-22, 2017
Status last verified
Jul 2025
First submitted
15 May 2018
Last updated
11 Jul 2025
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Barcellini W, Pane F, Patriarca A, Murakhovskaya I, Terriou L, DeSancho MT, Hanna WT, Leopold L, Rappold E, Szeto K, Wei S, Jager U. Parsaclisib for the treatment of primary autoimmune hemolytic anemia: Results from a phase 2, open-label study. Am J Hematol. 2024 Dec;99(12):2313-2320. doi: 10.1002/ajh.27493. Epub 2024 Oct 22.

    PubMed 39435908

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Parsaclisib in people with Autoimmune Hemolytic Anemia, run by Incyte Corporation at 12 sites in 4 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 11 Jul 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 12 sites in United States, Italy, France, Austria. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 22 Sep 2022). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Percentage of Participants Attaining a Complete Response at Any Visit From Week 6 to Week 12 (time frame: Week 6 to Week 12). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03538041, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 11 Jul 2025.

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