A Phase 1b/2 Study of Intravenous Brincidofovir in Patients With Relapsed or Refractory Lymphoma and Relapsed or Refractory Extranodal Natural Killer/T-cell Lymphoma

February 3, 2026 updated by: SymBio Pharmaceuticals

A Multi-Center, Global, Open-Label, Phase 1b/2 Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of Intravenous Brincidofovir in Patients With Relapsed or Refractory Lymphoma As Well As to Evaluate the Safety and Efficacy of Intravenous Brincidofovir in Patients With Relapsed or Refractory Extranodal Natural Killer/T-cell Lymphoma Using The Recommended Phase 2 Dose

This study is a multi-center, global, open-label, Phase 1b/2 clinical study, and it will be conducted at multiple study sites in several countries, including Japan, Korea, and Singapore, to reveal the safety, tolerability, dose limiting toxicity (DLT), maximum tolerated dose (MTD)/recommended Phase 2 dose (RP2D), pharmacokinetics (PK), and preliminary efficacy of BCV in patients with relapsed or refractory lymphoma and to assess the efficacy and safety of Brincidofovir (SyB V-1901, BCV) in patients with relapsed or refractory Extranodal Natural Killer/T-cell Lymphoma (ENKL).

This study consists of 2 parts and will enroll a total (maximum) of 43 male and female participants who meet the eligibility criteria (Phase 1b part: Up to 18 participants [3 to 6 participants in each of the 3 cohorts], Phase 2 part: 25 participants).

Study Overview

Status

Suspended

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

43

Phase

  • Phase 2
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
      • Hong Kong, China
        • Queen Mary Hospital
  • Japan
      • Bunkyō City, Japan
        • Tokyo Metropolitan Komagome Hospital
      • Chūōku, Japan
        • National Cancer Center Hospital
      • Kyoto, Japan
        • Kyoto University Hospital
      • Kōtoku, Japan
        • Cancer Institute Hospital of Jfcr
      • Okayama, Japan
        • Okayama University Hospital
      • Tsu, Japan
        • Mie University Hospital
  • Singapore
      • Singapore, Singapore
        • National Cancer Centre Singapore

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients who are histopathologically diagnosed with ENKL based on the World Health Organization (WHO) Classification of Malignant Lymphoma 5th Edition (WHO-HAEM5) (can be enrolled in the Phase 1b part and the Phase 2 part) or patients diagnosed with EBV-positive nodal T- and NK-cell lymphoma (EBV + nTNKCL), nodal T-follicular helper cell lymphoma (nTFHcL) (including angioimmunoblastic T-cell lymphoma (AITL) as defined in the WHO Classification, 4th Edition), peripheral T-cell lymphoma not otherwise specified (PTCL, NOS), anaplastic large cell lymphoma (ALCL), diffuse large B-cell lymphoma (DLBCL) (e.g., DLBCL, NOS), or adult T-Cell Leukemia Lymphoma (ATLL) (can only be enrolled in the Phase 1b part)
  • Patients with relapsed or refractory lymphoma and previously treated with systemic chemotherapy (history of multidrug chemotherapy including L-asparaginase such as SMILE therapy for ENKL is mandatory) who are ineligible for other systemic therapies
  • Patients with the following Eastern Cooperative Oncology Group (ECOG) Performance Status (PS):
  • Phase 1b part: 0-1
  • Phase 2 part: 0-2

Exclusion Criteria:

  • Patients with another active malignant tumor requiring treatment
  • Patients with NCI-CTCAE Grade 2 or higher diarrhea (increase of 4 or more bowel movements per day compared to usual number of bowel movements) within 7 days prior to starting the first dose of BCV
  • Graft-Versus-Host Disease (GVHD) patients requiring immunosuppressive agents
  • Patients with a history of Cidofovir intolerance
  • Patients with a history of being diagnosed with cirrhosis

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Brincidofovir twice weekly (BIW) via intravenous infusion
Drug: Brincidofovir
Phase 1b part is dose escalation study evaluating three dose levels of BCV, and participants will be assigned to a dose schedule in the order of study entry. In Phase 2 part, participants will receive BCV BIW at the RP2D (determined in the Phase 1b part).
Other Names:
  • SyB V-1901
  • BCV

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Phase 1b part (Dose Escalation Part)
Time Frame: 28 days
Adverse events (AEs) that meet the protocol-defined DLT criteria in Cycle 1 and the number of participants that developed these AEs
28 days
Phase 2 part (Expansion Part)
Time Frame: 7 months
Best Overall Response as of end of treatment
7 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

SymBio Pharmaceuticals

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

June 9, 2025

Primary Completion (Estimated)

October 23, 2027

Study Completion (Estimated)

May 8, 2029

Study Registration Dates

First Submitted

December 24, 2024

First Submitted That Met QC Criteria

January 5, 2025

First Posted (Actual)

January 7, 2025

Study Record Updates

Last Update Posted (Actual)

February 5, 2026

Last Update Submitted That Met QC Criteria

February 3, 2026

Last Verified

February 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • BCV-NL01

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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