Last updated on June 2019

M7824 in People With Recurrent Respiratory Papillomatosis

Brief description of study


PD-L1 is a protein on the surface of cells. It regulates if a cell can be killed by immune system cells. It is thought to be able to affect the immune system response to diseased cells like those infected with a virus. The molecule M7824 interferes with the activity of PD-L1. It could help the immune system kill cells infected with a virus . Since recurrent respiratory papillomatosis is caused by a virus infection, this molecule could help.


To see if M7824 works in treating recurrent respiratory papillomatosis.


Adults ages 18 years or older with recurrent respiratory papillomatosis


Participants will be screened with:

Medical history

Physical exam

Blood and pregnancy tests

Endoscopy procedure in clinic. A small tube with a camera will look at the inside of the nose, throat, larynx, and upper windpipe.

Some participants will also be screened with a chest scan.

At the start of the study, participants will:

Have a sedated endoscopy procedure where biopsies will be taken.

Have blood tests.

Have apheresis. Blood will be collected by a tube in an arm vein. A machine will remove white blood cells. The rest of the blood will be returned into an arm vein.

Fill out a voice questionnaire.

Participants will get the study molecule into a vein over about 1 hour. They will get it every other week for up to 12 weeks.

Participants will repeat screening and starting procedures throughout the study. They will also review side effects and any medicine they are taking.

When they are done with the study treatment, participants will be evaluated by repeating the study procedures. They may be evaluated periodically until their disease progresses....

Detailed Study Description


  • Recurrent respiratory papillomatosis (RRP) is a rare papillomatous disease of the aerodigestive tract that is caused by the Human Papilloma Virus (HPV).
  • RRP can progress to cause airway compromise, fatal pulmonary lesions, and invasive cancers.
  • There is no effective systemic therapy for RRP. Patients typically require repeated interventional procedures for disease control.
  • A recently completed phase II clinical trial investigating avelumab in subjects with aggressive RRP demonstrated an acceptable safety profile from Avelumab and a high rate of partial responses.
  • RRP is characterized by frequent expression of PD-L1 and TGF-beta in the tumor microenvironment.
  • This clinical trial will evaluate the activity of M7824, a novel bifunctional fusion protein composed of a fully human IgG1 monoclonal antibody against human PD-L1 (avelumab) fused, via a flexible glycine-serine linker, to the soluble extracellular domain of human TGF- B receptor II (TGF-BRII), which functions as a TGF-B trap. This drug was selected for its demonstrated activity in a variety of cancers and for its acceptable safety profile.


  • Determine the complete response rate for M7824 in the treatment of patients with RRP.


  • Histologically confirmed diagnosis of RRP.
  • One of the following:
  • A Derkay anatomic score of 10 or greater and a history of two or more endoscopic interventions in the last 12 months for control of RRP.
  • Pulmonary RRP with pulmonary disease that is measurable by computed tomography scan.
  • Tracheal involvement with RRP that has required either two or more endoscopic interventions in the last 12 months or a tracheostomy.
  • Age 18 years or greater.
  • Eastern Oncology Cooperative Group Performance Score of 0 or 1.


  • This is a phase II clinical trial with two cohorts that will enroll simultaneously.
  • Cohort 1 will consist of subjects who have not been treated previously with an immune checkpoint inhibitor. Cohort 2 will consist of subjects whose disease has been treated previously with andrefractory to an immune checkpoint inhibitor. Each cohort will have a Simon optimal two-stage design with initial enrollment of 12 patients and expans 21 patients if one or more complete response(s) is/are observed in the initial patients.

Clinical Study Identifier: NCT03707587

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