Positioning Imatinib for Pulmonary Arterial Hypertension

  • End date
    Jul 1, 2024
  • participants needed
  • sponsor
    Imperial College London
Updated on 27 September 2021


Pulmonary Arterial Hypertension (PAH) is a rare condition in which a narrowing of blood vessels carrying blood through the lungs puts an increased work load on the heart; it has to work harder to pump blood through the lungs. While current treatments relieve some of the symptoms, they do not stop or reverse the disease in the affected blood vessels. Imatinib is a medicine licensed for some types of cancers. A published study has shown that imatinib can have beneficial effects on blood flow through the lungs and exercise capacity in patients with PAH, even when added to existing treatments. However, there have been concerns about its safety and tolerability. Imatinib continues to be prescribed occasionally on compassionate grounds, usually when other treatment options have been exhausted, and some patients feel better on the drug. To improve the investigator's understanding, the investigators of this study re-visits the use of Imatinib as a potential treatment for patients with PAH.


What does the study involve?

The study involves treatment of PAH patients with imatinib (study drug) for up to 24 weeks, and clinical assessments and tests to assess the drug's safety and tolerability.

PAH patients will be seen at their local hospital by the PAH clinical research team. Before someone can start study, the study doctor (or clinical study team) will describe the clinical trial in detail. If a potential subject decides to participate, he/she will be asked to sign the informed consent form before any study procedures are done.

Participants will be asked to come to their local hospital for clinical appointments. This includes a screening visit, a baseline visit, three clinical assessments and an end-of-study visit. In between, and at the very end of these, there will be six tele-visits (assessments over the phone). Each clinical appointment will be on a weekday morning or afternoon. No major lifestyle restrictions are required for these appointments.

Participants will undergo clinical examinations and tests to monitor the severity of PAH and the response to the study drug. Clinical procedures include:

  • Questions about demographics, medical and medication history
  • Physical examination and record of vital signs (blood pressure, temperature, heart and respiratory rate)
  • Questionnaire about quality of life,
  • Assessments of PAH severity (WHO Functional Class, six-minute walk test, and Borg dyspnoea index)
  • Right heart catheterisation to assess response to the drug
  • Haematology and clinical chemistry blood tests to ensure safety
  • Serum pregnancy test and urine pregnancy tests (if applicable) to exclude pregnancy
  • Blood samples to measure the levels of the study drug in the circulation
  • Additional blood samples for future research on PAH and/or the mechanism of action of the drug
  • Electrocardiogram (ECG), and echocardiogram to assess the size, shape, pumping action and the extent of any damage to the heart
  • Brain MRI scan (or CT scan if MR is not indicated/tolerated) to exclude bleeding in the brain

Condition Pulmonary Arterial Hypertension
Treatment Imatinib Mesylate
Clinical Study IdentifierNCT04416750
SponsorImperial College London
Last Modified on27 September 2021


How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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