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Pelareorep

Phase 2

Breast Cancer Metastatic | Monoclonal antibody | Oncology |Oncolytics Biotech Inc.|Last Updated: Aug 26, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLED
Total Trials1
Total Enrollment48

FDA Designations

FAST_TRACKACCELERATED_APPROVALORPHAN_DRUG

Clinical trial landscape

Pelareorep · 3 trials · 8 indications

Phase 2 2Phase 1 1
NCT07446322FOLFIRI and Bevacizumab With or Without Pelareorep for Second-Line Treatment of Metastatic RAS-Mutated, Microsatellite-Stable Colorectal CancerRas-mutated Metastatic Colorectal Cancer
RECRUITING60 Analytics
NCT04215146A Study to Assess Overall Response Rate by Inducing an Inflammatory Phenotype in Metastatic BReast cAnCEr With the Oncolytic Reovirus PeLareorEp in CombinaTion With Anti-PD-L1 Avelumab and Paclitaxel - BRACELET-1 StudyBreast Cancer Metastatic
ACTIVE NOT_RECRUITING48 Analytics
PHASE2RECRUITING
FOLFIRI and Bevacizumab With or Without Pelareorep for Second-Line Treatment of Metastatic RAS-Mutated, Microsatellite-Stable Colorectal Cancer
Ras-mutated Metastatic Colorectal CancerUnlock trial analytics
PHASE2ACTIVE NOT_RECRUITING
A Study to Assess Overall Response Rate by Inducing an Inflammatory Phenotype in Metastatic BReast cAnCEr With the Oncolytic Reovirus PeLareorEp in CombinaTion With Anti-PD-L1 Avelumab and Paclitaxel - BRACELET-1 Study
Breast Cancer MetastaticUnlock trial analytics

Study Endpoints

Primary Endpoints

Overall Response Rate (ORR)
At week 8

Proportion of patients with complete response \[CR\], partial response \[PR\] assessed by the investigators and/or central reader according to RECIST v1.1

Overall Response Rate
at week 16

Overall response rate at week 16 according to RECIST V1.1

Overall Response Rate (ORR) for Cohort 1, 2, 4, and 5
At week 16 (within each cohort)

Proportion of patients with complete response \[CR\], partial response \[PR\] assessed by the investigators and/or central reader according to RECIST v1.1

Disease Control Rate (DCR) - Cohort 3
at week 16

DCR (complete response \[CR\], partial response \[PR\], and stable disease \[SD\]) assessed by the investigators according to RECIST v 1.1.

Overall Survival (OS) - Cohort 5
Cohort 5: From the date of randomization through long term follow up at 2 years

OS is defined as the time from date of first treatment to death from any cause

Secondary Endpoints

Overall Survival (OS) -
From the date of randomization through long term follow up at two years
Progression Free Survival (PFS)
From randomization to objective progression or death from any cause, whichever occurs first, up to two years
Disease Control Rate (DCR)
From randomization to disease progression or death from any cause, whichever occurs first, up to two years
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Arm AEXPERIMENTAL -
Arm BEXPERIMENTAL -
Cohort 1ACTIVE_COMPARATORPatients receive paclitaxel alone.
Cohort 2EXPERIMENTALPatients receive pelareorep + paclitaxel.
Cohort 3EXPERIMENTALPatients receive pelareorep + paclitaxel + avelumab.
Cohort 1: Metastatic Pancreatic Cancer 1LEXPERIMENTALPatients with first-line (1L) locally advanced/metastatic unresectable pancreatic ductal adenocarcinoma (PDAC): Pelareorep and atezolizumab added to gemcitabine and nab-paclitaxel
Cohort 2: Metastatic Colorectal Cancer 1L (MSI-H/dMMR)EXPERIMENTALPatients with 1L metastatic colorectal cancer (mCRC), limited to microsatellite instability-high (MSIH) or mismatch repair deficient (dMMR) tumors: Pelareorep and atezolizumab
Cohort 3: Metastatic Colorectal Cancer 3LEXPERIMENTALPatients with third-line (3L) mCRC independent of microsatellite instability (MSI)/dMMR status: Pelareorep and atezolizumab added to trifluridine/tipiracil
Cohort 4: Metastatic Unresectable Anal Cancer >/=2LEXPERIMENTALPatients with \>/= 2L locally advanced/metastatic unresectable squamous cell carcinoma of the anal canal (SCCA) of viral or non-viral origin after prior systemic chemotherapy: Pelareorep and atezolizumab
Cohort 5: Metastatic PDAC 1LEXPERIMENTALPatients with 1L metastatic PDAC: Pelareorep and modified FOLFIRINOX (mFOLFIRINOX) with or without atezolizumab

Interventions

NameTypeDescription
BevacizumabDRUGBevacizumab (5 mg/kg) IV infusion
FOLFIRIDRUGirinotecan (180mg/m2), leucovorin 400 mg/m2 ± 5-FU (400 mg/m2) IV infusion
PelareorepDRUGpelareorep 4.5 x 10\^10 TCID50 IV infusion
PaclitaxelDRUGPaclitaxel 80 mg/m\^2 1-hour IV infusion on days 1, 8, and 15 of a 28-day cycle.
AvelumabDRUGAvelumab 10 mg/kg (not more than 800 mg) 1-hour IV infusion days 3 and 17 of a 28-day cycle.
AtezolizumabDRUGAtezolizumab 840 mg IV infusion
Gemcitabine and nab-paclitaxelDRUGGemcitabine (1,000 mg/m2) and nab-paclitaxel (125 mg/m2)
Trifluridine TipiracilDRUGTrifluridine/tipiracil administered at a 35 mg/m2 dose orally twice daily
mFOLFIRINOX Treatment RegimenDRUGmFOLFIRINOX- IV oxaliplatin 85 mg/m2; IV leucovorin 400 mg/m2; IV irinotecan 150 mg/m2; 5-FU 2400 mg/m2 by 46-hour infusion, per local standard of care
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites13

Inclusion Criteria: * Histologically confirmed cancer of the colon or rectum with documented metastasis * Measurable disease per RECIST v. 1.1 * Not candidates for curative surgery or curative radiation * Progressed on, or been intolerant to, a first-line, oxaliplatin-based chemotherapy regimen in ...

Countries:United StatesGermany
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Competitive Landscape -Breast Cancer 399 trials (matched to "Breast Cancer Metastatic")

Top 20 of 91 competitors

CompanyTickerTrialsLead PhaseDrugs
AstraZeneca PLCAZN46PHASE3Fulvestrant, Capivasertib
Merck & Co., Inc.MRK12PHASE3Pembrolizumab, Paclitaxel, Doxorubicin, Epirubicin, Cyclophosphamide
Eli Lilly and CompanyLLY27PHASE3Abemaciclib, Standard Adjuvant Endocrine Therapy
BioNTech SE Sponsored ADRBNTX7PHASE3DB-1303/BNT323, T-DM1
Gilead Sciences, Inc.GILD13PHASE3Sacituzumab Govitecan-hziy, Eribulin, Capecitabine Product, Gemcitabine, Vinorelbine
Novartis AG Sponsored ADRNVS30PHASE3Ribociclib
Pfizer Inc.PFE34PHASE3ARV-471, Fulvestrant
BeOne Medicines Ltd. Sponsored ADRONC5PHASE3BGB-43395, Letrozole, Abemaciclib, Palbociclib, Ribociclib
Olema Pharmaceuticals, Inc.OLMA5PHASE3Palazestrant, Fulvestrant, Anastrozole, Letrozole, Exemestane
Jazz Pharmaceuticals Public Limited CompanyJAZZ3PHASE3Zanidatamab, Trastuzumab, Eribulin, Vinorelbine, Gemcitabine
Celcuity Inc.CELC3PHASE3Gedatolisib, Palbociclib, Fulvestrant, Alpelisib
Relay Therapeutics, Inc.RLAY2PHASE3Zovegalisib, Capivasertib, Fulvestrant
GSK plc Sponsored ADRGSK2PHASE3Niraparib
Greenwich LifeSciences, Inc.GLSI1PHASE3GLSI-100
Bristol-Myers Squibb CompanyBMY5PHASE2Iza-bren, Nab-paclitaxel, Paclitaxel, Capecitabine, Carboplatin
BriaCell Therapeutics CorpBCTX1PHASE3SV-BR-1-GM, Cyclophosphamide, Interferon infiltration of the inoculation site, Retifanlimab, Treatment of Physician's Choice
Incyte CorporationINCY4PHASE2Ruxolitinib, Capecitabine, Regorafenib
Natera, Inc.NTRA3PHASE2Discontinuation of the anti-HER2 maintenance therapy
Puma Biotechnology, Inc.PBYI3PHASE2Neratinib, Loperamide, Colesevelam
Atossa Therapeutics, Inc.ATOS1PHASE2endoxifen, goserelin
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Recent Changes (Last 90 Days)

LOWAug 26, 2026NCT07446322lastUpdatePostDate: changed
LOWAug 26, 2026NCT07446322lastUpdatePostDate: changed
LOWAug 20, 2026NCT07446322lastUpdatePostDate: changed
LOWAug 20, 2026NCT07446322lastUpdatePostDate: changed
LOWAug 20, 2026NCT07446322lastUpdatePostDate: changed
LOWAug 20, 2026NCT07446322lastUpdatePostDate: changed
LOWJul 15, 2026NCT07446322lastUpdatePostDate: changed
LOWJul 15, 2026NCT07446322lastUpdatePostDate: changed

Frequently asked questions about Pelareorep

What is Pelareorep used for?

Pelareorep is an investigational oncolytic virus being studied for metastatic breast cancer, RAS-mutated metastatic colorectal cancer, and metastatic anal cancer. It is being evaluated in combination with other agents, including checkpoint inhibitors and chemotherapy, across multiple clinical trials.

Who makes Pelareorep?

Pelareorep is being developed by Oncolytics Biotech Inc., a biopharmaceutical company traded under the ticker symbol ONCY. The company is conducting clinical trials of Pelareorep in oncology indications.

What phase is Pelareorep in?

Pelareorep is in Phase 1 and Phase 2 clinical trials. It is an investigational drug and has not been approved by regulatory authorities. The trials are active but not recruiting or currently recruiting patients.

What clinical trials is Pelareorep in?

Pelareorep is being studied in three trials: NCT04215146 (BRACELET-1) in metastatic breast cancer, NCT07280377 in advanced gastrointestinal cancers including anal cancer, and NCT07446322 in RAS-mutated metastatic colorectal cancer. These trials combine Pelareorep with agents like avelumab, atezolizumab, and bevacizumab.

What does Pelareorep target?

Pelareorep is an oncolytic reovirus designed to infect and replicate in cancer cells, inducing an inflammatory phenotype that may enhance anti-tumor immune responses. It is being studied in combination with immune checkpoint inhibitors to potentially improve treatment outcomes.

Is Pelareorep the same as other drugs?

Pelareorep is also known as the oncolytic reovirus. It is a distinct investigational agent and is not the same as other approved oncolytic viruses. Its unique mechanism and combination strategies differentiate it in clinical development.