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Impact of Low-Dose Radiotherapy on Tumour Biology and CAR T-Cell Therapy Outcomes

Evaluating the Impact of Low-Dose Radiotherapy on Tumour and Tumour Microenvironment in Relapsed or Refractory Large B-Cell Lymphoma to Improve CAR T-cell Therapy Outcomes: An Exploratory Prospective Observational Cohort Study - Impact of Low-Dose Radiotherapy on Tumour Biology and CAR T-Cell Therapy Outcomes

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
NL-OMON
Registry ID
NL-OMON58491
Enrollment
24
Registered
2025-08-21
Start date
2026-03-01
Completion date
Unknown
Last updated
2026-04-14

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

Conditions

DLBCL, CAR T-cell therapy Agressive lymphoma, CAR T-cell therapy

Interventions

Biopsies and blood samples of 24 patients

Sponsors

Universitair Medisch Centrum Groningen
Lead Sponsor

Eligibility

Age
18 Years to 99 Years

Inclusion criteria

Inclusion criteria: Histologically confirmed DLBCL and associated subtypes, defined by WHO 2016 classification: DLBCL not otherwise specified (NOS), High-grade B-cell lymphoma with MYC and BCL2 and/or BCL6 rearrangements with DLBCL histology (DHL/THL) and FL3B, Aggressive B-cell lymphoma, T-cell/histiocyte rich B-cell lymphoma, Primary mediastinal B-cell lymphoma, EBV+ DLBCL, transformed lymphoma (e.g. transformed follicular or marginal zone lymphoma). Eligible for CAR T-cell therapy according to criteria set by the Dutch National Tumour Board. Radiotherapy as bridging therapy administered as a multiple of 4 Gy, 2-5 x 4 Gy. Patients able to provide sufficient tumour biopsy material, following standard safety and accessibility criteria. Measurable disease, as defined by Lugano criteria Signed informed consent. Age =18 at the time of signing informed consent.  Ability to comply with the protocol. 

Exclusion criteria

Exclusion criteria: Patients who are not bridged with radiotherapy Patients for whom a biopsy cannot be safely performed

Design outcomes

Primary

MeasureTime frame
Primary study endpoint: Immunological changes in tumour biopsies and their microenvironment before and after radiotherapy, including changes in antigen presentation, immune checkpoint expression, adhesion and co-stimulatory proteins, and immune cell infiltration.

Secondary

MeasureTime frame
Secondary study endpoints: Blood dynamics of lymphocytes and their subtypes before, during, and after radiotherapy.Plasma dynamics of pro-inflammatory cytokines before, during, and after radiotherapy.

Countries

Netherlands

Contacts

Public ContactA.G.H. Niezink

Universitair Medisch Centrum Groningen

a.g.h.niezink@umcg.nl0503619382

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP) · Data processed: Apr 17, 2026