for people ages 18 years and up (full criteria)
at Irvine, California and other locations
study started
completion around



This is a Phase 1b/2a, open-label, multi-center, dose-escalation and safety/efficacy evaluation trial of Pexa-Vec plus Cemiplimab in patients with metastatic or unresectable renal cell carcinoma (RCC). The trial consists of a dose-escalation stage, where the maximum feasible dose of Pexa-Vec in combination with Cemiplimab will be determined, followed by an expansion stage. During the expansion patients will receive Cemiplimab alone or in combination with Pexa-Vec, which will be administered either through intravenous (IV) or intratumoral (IT) injection.

Official Title

A Phase 1b/2a Dose-escalation and Safety/Efficacy Evaluation Study of Pexa-Vec (Thymidine Kinase-Deactivated Vaccinia Virus Plus GM-CSF) in Combination With Cemiplimab (REGN2810; Anti-PD-1) in Patients With Metastatic or Unresectable Renal Cell Carcinoma (RCC)


Renal Cell Carcinoma, Cancer, Clear cell renal cell carcinoma, Vaccinia, Carcinoma, Cemiplimab, Pexastimogene Devacirepvec (Pexa-Vec)


You can join if…

Open to people ages 18 years and up

  • Histologically or cytologically confirmed metastatic or unresectable clear cell renal cell carcinoma (ccRCC)
  • Part 2 Arm D ONLY: Patients must be refractory to anti PD-1 or anti-PD-L1 (either as monotherapy or in-combination with other approved checkpoint inhibitors or targeted therapies according to their approved label) and patients must meet all of the following criteria:
    1. Received treatment of approved anti PD-1 or anti-PD-L1 (dosed per label of the country providing the clinical site) for at least 6 weeks. History of anti-PD-L1 only is not allowed.
    2. Progressive disease after anti PD-1 or anti-PD-L1 will be defined according to RECIST 1.1. The initial evidence of progressive disease is to be confirmed by a second assessment, no less than 4 weeks from the date of the first documented progressive disease, in the absence of rapid clinical progression. (This determination is made by the Investigator; the Sponsor will collect imaging scans for retrospective analysis. Once progressive disease is confirmed, the initial date of progressive disease documentation will be considered the date of disease progression).
    3. Documented disease progression within 12 weeks of the last dose of anti PD-1 or anti-PD-L1. Patients who were re-treated or on maintenance with anti-PD-1 or anti-PD-L1 will be allowed to enter the study as long as there is documented progressive disease within 12 weeks of the last treatment date.
  • Naive to systemic therapy for RCC or have progressed after, or were intolerant of, prior systemic therapy.
  • Measurable disease based on RECIST 1.1 criteria. Tumor lesions situated in a previously irradiated area are considered measurable if progression has been demonstrated in such lesions
  • Karnofsky performance status of 70-100
  • Age ≥20 years old (or appropriate age of consent for the region)
  • Adequate hematological, hepatic, and renal function

You CAN'T join if...

  • Known significant immunodeficiency due to underlying illness (e.g., human immunodeficiency virus [HIV] / acquired immune deficiency syndrome [AIDS]) and/or immune-suppressive medication including high-dose corticosteroids
  • Part 2 only: Arm A,B,C: Prior treatment with any anti-cancer immunotherapy, including therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent (prior IL-2 or interferon allowed) . For Part 1: patients are excluded if they were intolerant to anti-PD-1 or anti-PD-L1 targeted therapies
  • Major surgery within 4 weeks of study treatment (minor surgical procedures are allowed)
  • Ongoing severe inflammatory skin condition requiring prior medical treatment
  • History of eczema requiring prior medical treatment
  • Tumor(s) invading a major vascular structure (e.g., carotid artery) or other key anatomical structure (e.g., pulmonary airway) OR viable central nervous system malignancy
  • Clinically significant and/or rapidly accumulating ascites, pericardial and/or pleural effusions.
  • Symptomatic cardiovascular disease, including but not limited to significant coronary artery disease (e.g., requiring angioplasty or stenting) or congestive heart failure within the preceding 12 months.
  • Asymptomatic cardiovascular disease (current or past history) unless cardiology consultation and clearance has been obtained for study participation.
  • Inability to suspend treatment with anti-hypertensive medication for 48 hours prior to and 48 hours after all Pexa-Vec treatments
  • Use of interferon/pegylated interferon (PEG-IFN) or ribavirin that cannot be discontinued within 14 days prior to any Pexa-Vec dose
  • Known active Hepatitis B or Hepatitis C


  • Site 2644 University of California, Irvine
    Irvine California 92868 United States
  • Site 2643 Washington University
    Saint Louis Missouri 63141 United States


in progress, not accepting new patients
Start Date
Completion Date
SillaJen, Inc.
Phase 1/2 research study
Study Type
About 89 people participating
Last Updated