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Warm Antibody Autoimmune Hemolytic AnemiaPhase 2/3wAIHANCT05535933

HMPL-523 (Sovleplenib) in the Treatment of Warm Antibody Autoimmune Hemolytic Anemia

A Phase 2/3 study testing HMPL-523(300mg PO QD) in people with Warm Antibody Autoimmune Hemolytic Anemia, run by Hutchmed at 39 sites in China.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

Phase II Study: To evaluate the safety and preliminary efficacy of HMPL-523 in adult patients with wAIHA. Phase III Study(Part A): Confirmation of Efficacy safety and of HMPL-523 in adult patients with wAIHA. Read more about this study

Who is it for?
Ages 18 to 75 years
What is being tested?
HMPL-523(300mg PO QD)
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
111 participants
Where
39 sitesChina
Study dates
30 Sep 2022to Nov 2026
Phase
Phase 2/3
Are there results?
Not yet: the study is under way

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 to 75 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Voluntarily signed the informed consent form (ICF);
  • Males or females aged 18 to 75 years;
  • Patients diagnosed with primary wAIHA or secondary wAIHA whose underlying diseases are stable;
  • Organs in good function.

Who cannot join

  • Patients with other types of AIHA other than wAIHA;
  • Patients with secondary wAIHA with unstable underlying disease;
  • Patients with drug-induced secondary wAIHA;
  • Patients with infections requiring systemic treatment;
  • Patients previously treated with Syk inhibitors (e.g., fostamatinib);
  • Patients with known allergy to the active ingredients or excipients of the study drug;
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  • Patients with serious psychological or mental disorder;
  • Alcoholic or drug abuser;
  • Female patients who are pregnant and lactating.

Trial locations and contacts

39 sites in 1 country.

39 sites in 1 country

China39 sites
  • Affiliated hospital of Hebei university

    Baoding, Hebei

  • Peking Union Medical College Hospital

    Beijing

  • Affiliated Hospital of Binzhou Medical College

    Binzhou, Shandong

  • Bethune First Hospital Of Jilin University

    Changchun, Jilin

  • The First People's Hospital of Changde City

    Changde, Hunan

  • The third xiangya hospital of central south university

    Changsha, Hunan

  • Xiangya Hospital of Central South University

    Changsha, Hunan

  • Heping Hospital Affiliated To Changzhi Medical College

    Changzhi, Shanxi

  • Affiliated hospital of chengde medical university

    Chengde, Hebei

  • Chenzhou First People's Hospital

    Chenzhou, Hunan

  • Fuyang Hospital Of Anhui Medical University

    Fuyang, Anhui

  • Fujian Medical University Union Hospital

    Fuzhou, Fujian

  • Nanfang hospital

    Guangzhou, Guangdong

  • Guilin Medical College Affiliated Hospital

    Guilin, Guangxi

  • Hainan General Hospital

    Haikou, Hainan

  • The First Affiliated Hospital, Zhejiang University School of Medicine

    Hangzhou, Zhejiang

  • Harbin First Hospital

    Harbin, Heilongjiang

  • The Second Affiliated Hospital of Kunming Medical University

    Kunming, Yunnan

  • Lanzhou University Second Hospital

    Lanzhou, Gansu

  • The First Affiliated Hospital of Henan University Of Science and Technology

    Luoyang, Henan

  • The Affiliated Hospital of Southwest Medical University

    Luzhou, Sichuan

  • Jiangxi Provincial people's Hospital

    Nanchang, Jiangxi

  • The First affiliated hospital of nanchang uiversity

    Nanchang, Jiangxi

  • Jiangsu province hospital

    Nanjing, Jiangsu

  • Affiliated hospital of nantong university

    Nantong, Jiangsu

  • Jinshan Hospital of Fudan University

    Shanghai, Shanghai Municipality

  • Shenzhen Second People's Hospital

    Shenzhen, Guangdong

  • Hematology Hospital of Chinese Academy of Medical Sciences

    Tianjin

  • Xinjiang Uygur Autonomous Region People's Hospital

    Ürümqi, Xinjiang

  • The First Affiliated Hospital of WMU

    Wenzhou, Zhejiang

  • Union Hospital, Tongji Medical College, Huazhong University of Science and Technology

    Wuhan, Hubei

  • Shaanxi Provincial People's Hospital

    Xi'an, Shaanxi

  • Xiangyang Center Hospital

    Xiangyang, Hubei

  • Qinghai provincial people's hospital

    Xining, Qinghai Provincial

  • Xinxiang Central Hospital

    Xinxiang, Henan

  • Yantai Yuhuangding Hospital

    Yantai, Shandong

  • Affiliated Hospital of Guangdong Medical University

    Zhanjiang, Guangdong

  • Henan Cancer Hospital

    Zhengzhou, Henan

  • The First Affiliated Hospital of Zhengzhou University

    Zhengzhou, Henan

Other trials in China

About this study

Official title: A Randomized, Double-Blind, Placebo-Controlled Phase II/III Study to Evaluate the Efficacy, Safety, Tolerability, and Pharmacokinetics of HMPL-523 in the Treatment of Warm Antibody Autoimmune Hemolytic Anemia

Phase II Study: To evaluate the safety and preliminary efficacy of HMPL-523 in adult patients with wAIHA.

Phase III Study(Part A): Confirmation of Efficacy safety and of HMPL-523 in adult patients with wAIHA.

Phase III Study (Part B): To further evaluate the long-term safety and tolerability of HMPL-523 in adult patients with wAIHA.

Read the detailed description

Phase II Study: An eight-week randomized, placebo-controlled, double-blind phase followed by at least a 16-week open-label HMPL-523 treatment to evaluate the safety and preliminary efficacy of HMPL-523. The primary endpoint was the proportion of patients with overall Hb response by week 24.

Phase III study (Part A):A 24-week randomized, placebo-controlled double-blind phase to evaluate efficacy and safety of HMPL-523. The primary endpoint was the proportion of patients who achieve a durable response during weeks 5 to 24.

Phase III Study (Part B): An open-label Phase evaluating long-term safety and efficacy of HMPL-523 treatment. Eligible patients include those with lack of efficacy during the 20-week Phase III Part A treatment, completion of the Phase II study, or completion of 24-week Phase III Part A treatment with investigators assessment of potential benefit from open-label treatment with HMPL-523.

Being tested
HMPL-523(300mg PO QD), Placebo

What participants receive

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

  • HMPL-523(300mg PO QD)Drug

    Also called Sovleplenib

    HMPL-523(300mg PO QD)

  • PlaceboDrug

    Placebo(300mg PO QD)

Study groups in NCT05535933
Study groupRoleWhat they receive
HMPL-523ExperimentalPhase II: Eligible subjects will receive 300 mg HMPL-523 treatment once daily for 8 weeks and at least 16 weeks open-label treatment. Phase III: Part A (Randomized, Double-Blind Phase): Eligible subjects will receive 300 mg HMPL-523 treatment once daily for 24 weeks. Part B (Open-label Phase): Eligible subjects will roll-over into the open-label phase and receive treatment with HMPL-523 at the same dose administered after 24-week randomized controlled trial phase (Part A) or in Phase II. Treatment will continue until 24 weeks after the last subject is enrolled in Part B.
Receives: Drug: HMPL-523(300mg PO QD)
PlaceboPlacebo comparatorPhase II: Eligible subjects will receive 300 mg HMPL-523 matched placebo treatment once daily for 8 weeks. Phase III: Part A (Randomized, Double-Blind Phase): Eligible subjects will receive 300 mg HMPL-523 matched placebo treatment once daily for 24 weeks.
Receives: Drug: Placebo

What is being measured

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

  1. Phase II: Overall Hb response rate

    Phase II: Overall Hb response rate: The proportion of patients with overall Hb response by Week 24

    Measured: 24Weeks

  2. Phase III(Part A): Durable Hb response rate

    Phase III(Part A):Durable Hb response rate: The proportion of patients who achieve a durable response by Week 24 during Part A

    Measured: 24Weeks

Secondary outcomes (25)
  1. Phase II: Overall Hb response rate

    Phase II: Overall Hb response rate: the proportion of patients with overall Hb response by Week 8

    Measured: 8 Weeks

  2. Phase II: Durable Hb response rate

    Phase II: Durable Hb response rate: the proportion of patients who achieve a durable response by Week 24.

    Measured: 24 Weeks

  3. Phase II: Median change in Hb

    Phase II: Median change from baseline in Hb at Weeks 8 and 24 of treatment.

    Measured: 24 Weeks

  4. Phase II: Effects on reticulocyte count

    Phase II: Change from baseline in reticulocyte count at Weeks 8 and 24 of treatment.

    Measured: 24 Weeks

  5. Phase II: Effects on lactate dehydrogenase

    Phase II: Change from baseline in lactate dehydrogenase(LDH) at Weeks 8 and 24 of treatment.

    Measured: 24 Weeks

  6. Phase II: Effects on haptoglobin

    Phase II: Change from baseline in haptoglobin at Weeks 8 and 24 of treatment.

    Measured: 24 Weeks

  7. Phase II: Effects on total bilirubin(TBIL)

    Phase II: Change from baseline in total bilirubin(TBIL) at Weeks 8 and 24 of treatment.

    Measured: 24 Weeks

  8. Phase II: Proportion of rescue therapy

    Phase II: Proportion of patients who received rescue therapy by Weeks 8 and 24 of treatment.

    Measured: 24 Weeks

  9. Phase II: Proportion of patients with dose reduction in baseline anti-wAIHA medications

    Phase II: Proportion of patients who had a dose reduction in glucocorticoids or other baseline concomitant anti-wAIHA medications by Weeks 8 and 24 of treatment.

    Measured: 24 Weeks

  10. Phase II: Time to response

    Phase II: Time to response

    Measured: 24 Weeks

  11. Phase II: Effect of study treatment on patient fatigue

    Phase II: Evaluation of the effect of study treatment on fatigue at Weeks 8 and 24, as assessed by the Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-F)

    Measured: 24 Weeks

  12. Phase II: Effect of study treatment on quality of life

    Phase II: Evaluation of the effect of study treatment on quality of life at Weeks 8 and 24, as assessed by the 36-Item Short Form Health Survey (SF-36).

    Measured: 24 Weeks

  13. Phase III(Part A): Overall Hb response rate

    Phase III(Part A): Proportion of patients who achieved an overall Hb response during the 20-week and 24-week double-blind treatment periods(defined as at least one Hb value ≥100g/L with an increase of at least 20g/L from baseline, not attributable to rescue therapy).

    Measured: 24 Weeks

  14. Phase III(Part A): Median change in Hb

    Phase III(Part A): Median change from baseline in Hb during the 20-week and 24-week double-blind treatment periods.

    Measured: 24 Weeks

  15. Phase III(Part A): Effects on reticulocyte count

    Phase III(Part A): Change from baseline in reticulocyte count during the 20-week and 24-week double-blind treatment periods.

    Measured: 24 Weeks

  16. Phase III(Part A): Effects on lactate dehydrogenase

    Phase III(Part A): Change from baseline in lactate dehydrogenase(LDH) during the 20-week and 24-week double-blind treatment periods.

    Measured: 24 Weeks

  17. Phase III(Part A): Effects on haptoglobin

    Phase III(Part A): Change from baseline in haptoglobin during the 20-week and 24-week double-blind treatment periods.

    Measured: 24 Weeks

  18. Phase III(Part A): Effects on total bilirubin(TBIL)

    Phase III(Part A): Change from baseline in total bilirubin(TBIL) during the 20-week and 24-week double-blind treatment periods.

    Measured: 24 Weeks

  19. Phase III(Part A): Proportion of rescue therapy

    Phase III(Part A): Proportion of patients who received protocol-defined rescue therapy during the 20-week and 24-week double-blind treatment periods.

    Measured: 24 Weeks

  20. Phase III (Part A): Proportion of patients reducing or discontinuing baseline anti-wAIHA medications

    Phase III(Part A):The proportion of patients who reduced or discontinued glucocorticoids or other baseline concomitant anti-wAIHA medications during the 20-week and 24-week double-blind treatment periods.

    Measured: 24 Weeks

  21. Phase III(Part A): Time to first response

    Phase III(Part A): Time to first response

    Measured: 24 Weeks

  22. Phase III(Part A): Duration of durable response

    Phase III(Part A): Duration of durable response

    Measured: 24 Weeks

  23. Phase III(Part A): Cumulative duration of response

    Phase III(Part A): Cumulative duration of response

    Measured: 24 Weeks

  24. Phase III(Part A): Effect of study treatment on patient fatigue

    Phase III(Part A): Effect of study treatment on patient fatigue during the 20-week and 24-week treatment periods, as assessed by the FACIT-F score (40 items; range, 0-160), including the FACIT-Fatigue subscale (13 items; range, 0-52).

    Measured: 24 Weeks

  25. Phase III(Part A): Effect of study treatment on patients' quality

    Phase III(Part A): Effect of study treatment on patients' quality of life during the 20-week and 24-week treatment periods, as assessed by SF-36.

    Measured: 24 Weeks

Timeline

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

  1. First posted10 Sep 2022
  2. Study start30 Sep 2022
  3. Primary completion25 Nov 2025
  4. Study completionNov 2026 (estimated)

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 2/3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
111 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05535933
Sponsor's protocol ID
2022-523-00CH1
Acronym
wAIHA
Status last verified
May 2026
First submitted
31 Aug 2022
Last updated
18 May 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: The results of this study can be published in core journals or international scientific conferences, and the primary investigators who make significant contributions to the implementation and management of this study and the personnel who makes great contributions to the design, interpretation or analysis of this study (such as the staffs or consultants of the sponsor) can have their authorship attribution. The sponsor promises to provide the manuscript to the investigator for review before publication of any result of the study. Investigators have to obtain the approval of the sponsor before submitting academic articles or abstracts. The study personnel have the right to publish results of this study, however, the requirement of protecting confidential information must be met. The confidential information is the property of the sponsor only, cannot be disclosed to others without the written approval of the sponsor, and cannot be used for other purposes.

Publications

  • Zhao X, Sun J, Zhang Z, Chen M, Gong T, He G, Li Y, Liu H, Li F, Li X, Zhou H, Wang X, Hong M, Lei L, Yin H, Luo X, Li Y, Fan S, Guo X, Shi MM, Su W, Zhang L, Han B, Zhang F. Sovleplenib in patients with primary or secondary warm autoimmune haemolytic anaemia: results from phase 2 of a randomised, double-blind, placebo-controlled, phase 2/3 study. Lancet Haematol. 2025 Feb;12(2):e97-e108. doi: 10.1016/S2352-3026(24)00344-2. Epub 2025 Jan 9.

    PubMed 39799953

Questions about this trial

What is this clinical trial studying?

A Phase 2/3 study testing HMPL-523(300mg PO QD) in people with Warm Antibody Autoimmune Hemolytic Anemia, run by Hutchmed at 39 sites in China.

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 4 inclusion and 9 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: under way, not looking for participants, as of the sponsor's last update on 18 May 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 39 sites in China. 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. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined 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.

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

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

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

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?

Phase II: Overall Hb response rate (time frame: 24Weeks). The study lists 2 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 NCT05535933, 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 18 May 2026.

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