Now enrolling a research study for possible treatment of primary ITP. Learn more and see if you may qualify. 

This study is evaluating the safety and effectiveness of an investigational medicine in people with primary immune thrombocytopenia (ITP). By choosing to volunteer, you will represent many others like you who are living with primary ITP.

Who may participate

Joining a research study is an important and personal decision. Thank you for considering this study.

This study may be an option for you if you are between the ages of 18-70 and were diagnosed with primary ITP at least 3 months ago.

There are other requirements for participation in the study. The study doctor will explain these to you.


Primary Immune Thrombocytopenia


18-70 years


Male or Female

Each clinical study has its own guidelines for who can participate, called eligibility criteria. However, only the research study staff can determine if you qualify to enroll in the study.

What to expect

If you decide to participate, the study team will conduct a screening visit to determine if you meet the study requirements.

All participants will receive the study medicine during their time in the study. The study medicine is given as a subcutaneous injection (beneath the skin) in the abdomen, arm, or thigh once a month for 4 months.

You will be enrolled in the study for a minimum of 7 months. During this time, you will need to attend at least 11 office visits so the study team can monitor how you are responding to the study medicine. The study team will perform physical exams and other tests to monitor your health. If your B cell counts have not improved after 7 months, you will be asked to attend additional follow-up visits about every 2 months until they do.

Length of study treatment

4 months

Number of study visits


Long-term follow up

2 follow-up visits at Week 20 and Week 24

Additional medications

Prednisone, diphenhydramine, acetaminophen

About Primary Immune Thrombocytopenia

Immune thrombocytopenia (ITP) is an autoimmune disorder in which the immune system mistakenly attacks healthy platelets (cells that help blood clot). In some cases, ITP is caused by the body’s response to another disease or infection, but in other cases, doctors are not sure what causes ITP. When someone develops ITP without a clear reason, it is called primary ITP.

Some people with ITP may not have any symptoms, but others may experience easy or excessive bruising and bleeding. Current treatments for ITP include corticosteroids like prednisone or dexamethasone, and in severe cases, transfusion or surgery.

About the Study Medicine

The study medicine is an investigational humanized IgG1 antibody given as four injections in the abdomen, arm, or thigh. It is currently in development for the treatment of lupus. Researchers believe it may also be helpful for treating other autoimmune diseases like primary ITP.

The study medicine is considered investigational because it has not yet been approved for use outside of clinical trials.

Frequently Asked Questions

How long will I be in this study?

You should expect to be in the study for a minimum of 7 months. 

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Will I know if I’m receiving the study medicine?

This study does not include a placebo, meaning all participants will receive the study medicine.

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What if I change my mind about participating?

Your participation in this study is completely optional. You can choose to stop participating in the study at any time, for any reason. Choosing not to participate in this study will not affect your future medical care. 

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What are possible side effects?

Your study doctor will discuss all the possible risks and benefits of participating in this study with you before you choose to enroll. You can choose to no longer participate in the study at any time.

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What about COVID-19?

Because the study medicine may interfere with COVID-19 vaccines, if you should require this vaccine, you should complete your final vaccination dose at least 1 month before starting the study. You will not be able to get a COVID-19 vaccine during your time in the study. You should let the study team know right away if you are diagnosed with COVID-19 or have any signs or symptoms of COVID-19 during your time in the study.

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