for people ages 18 years and up (full criteria)
at Los Angeles, California and other locations
study started
completion around
Principal Investigator
by Bartosz Chmielowski



RPL-001-16 is a Phase 1/2, open label, dose escalation and expansion clinical study of RP1 alone and in combination with nivolumab in adult subjects with advanced and/or refractory solid tumors, to determine the maximum tolerated dose (MTD) and recommended Phase 2 dose (RP2D), as well as to evaluate preliminary efficacy.

Official Title

An Open-Label, Multicenter, Phase 1/2 Study of RP1 as a Single Agent and in Combination With PD1 Blockade in Patients With Solid Tumors


RP1 is a genetically modified herpes simplex type 1 virus that is designed to directly destroy tumors and to generate an anti-tumor immune response. This is a Phase 1/2, open label, multicenter, dose escalation and expansion, first-in-human (FIH) clinical study to evaluate the safety and tolerability, biodistribution, shedding, and preliminary efficacy of RP1 alone and in combination with nivolumab in adult subjects with advanced and/or refractory solid tumors. The study will include a dose escalation phase for single agent RP1, an expansion phase with a combination of RP1 and nivolumab and a Phase 2 portion in specified tumor types for the combination therapy.


Cancer, Melanoma (Skin), Mismatch Repair Deficiency, Microsatellite Instability, Non-melanoma Skin Cancer, Cutaneous Melanoma, NSCLC, Oncolytic virus, Oncolytic Immuno-gene therapy, Anti-PD1 failed, Melanoma, Skin Neoplasms, Cutaneous Malignant Melanoma, Nivolumab, RP1 (IT) and nivolumab (IV) in melanoma, RP1 (IT) and nivolumab (IV) in MSI-H/dMMR solid tumors, RP1 (IT) and nivolumab (IV) in NMSC


You can join if…

Open to people ages 18 years and up

  • Have an Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0-1.
  • At least one measurable and injectable lesion
  • Have provided a former tumor pathology specimen or be willing to supply a new tumor sample from a biopsy
  • Have a predicted life expectancy of ≥ 3 months
  • Measurable disease, according to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 criteria
  • Subjects with MSI-H or dMMR tumors: has diagnosis of MSI-H or metatstatic dMMR tumor (according to protocol definition) who has progressed on prior anti-PD1/PD-L1 therapy.
  • Subjects with NMSC: has diagnosis of locally advanced or metastatic NMSC that are not considered treatable by surgery including basal cell carcinoma, cutaneous squamous cell carcinoma, basosquamous carcinoma, Merkel cell carcinoma and other non-melanoma skin cancers (per protocol). Patients must have received 8 weeks of anti-PD1/PD-L1 as their last line of therapy and progressed while on treatment.
  • Subjects with anti-PD1 failed cutaneous melanoma: has confirmed progressive disease while on anti-PD1 treatment for at least 8 weeks and documented BRAF mutation status
  • Subjects with anti-PD1 failed NSCLC: must have failed prior treatment, including PD1/PD-L1 directed therapy administered either as monotherapy or in combination with platinum-based chemotherapy or anti-CTLA-4. The most recent treatment given must have included an anti-PD1/PD-L1 directed therapy with radiologic disease progression on or after treatment.

You CAN'T join if...

  • Prior treatment with an oncolytic therapy
  • History of viral infections according to the protocol
  • Prior complications with herpes infections
  • Chronic use of anti-virals
  • Uncontrolled/untreated brain metastasis
  • History of interstitial lung disease
  • History of non-infectious pneumonitis
  • History of clinically significant cardiovascular disease


  • UCLA accepting new patients
    Los Angeles California 90095 United States
  • University of Southern California accepting new patients
    Los Angeles California 90033 United States

Lead Scientist at UCLA

  • Bartosz Chmielowski
    HS Clinical Professor, Medicine. Authored (or co-authored) 127 research publications


accepting new patients
Start Date
Completion Date
Replimune Inc.
Sign up for this study
Phase 2 research study
Study Type
Expecting 340 study participants
Last Updated