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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

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

Status
Suspended
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06761677
Enrollment
43
Registered
2025-01-07
Start date
2025-06-09
Completion date
2029-05-08
Last updated
2026-02-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Relapsed or Refractory Lymphoma Including ENKL

Keywords

SyB V-1901, BCV, Relapsed or refractory Lymphoma, Extranodal Natural Killer/T-cell Lymphoma, ENKL, EBV-positive nodal T- and NK-cell lymphoma, EBV + nTNKCL, nodal T-follicular helper cell lymphoma, nTFHcL, angioimmunoblastic T-cell lymphoma, AITL, peripheral T-cell lymphoma not otherwise specified, PTCL-NOS, anaplastic large cell lymphoma, ALCL, diffuse large B-cell lymphoma, DLBC, DLBCL-NOS, adult T-Cell Leukemia Lymphoma, ATLL

Brief summary

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).

Interventions

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).

Sponsors

SymBio Pharmaceuticals
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

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

Design outcomes

Primary

MeasureTime frameDescription
Phase 1b part (Dose Escalation Part)28 daysAdverse events (AEs) that meet the protocol-defined DLT criteria in Cycle 1 and the number of participants that developed these AEs
Phase 2 part (Expansion Part)7 monthsBest Overall Response as of end of treatment

Countries

China, Japan, Singapore

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 6, 2026