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No longer recruiting (closed or complete)Last updated: 5 January 2026

GOLSEEK-1: This study is evaluating the effectiveness and safety of a drug called Golcadomide when given in combination with R-CHOP chemotherapy, compared to placebo and R-CHOP chemotherapy, in people with previously untreated, high-risk large B-cell lymphomaA Phase 3, Multicenter, Randomized, Double-blind, Placebo-controlled Study Comparing the Efficacy and Safety of Golcadomide Plus R-CHOP Chemotherapy vs Placebo Plus R-CHOP Chemotherapy in Participants With Previously Untreated High-risk Large B-cell Lymphoma

Trial purpose

Medical clipboardCancer treatment

Tumor type

Blood Cancers Haematological

Age

People18 - 80

Trial acronym

GOLSEEK-1

Clinical summary

Summary

Eligible participants will be randomly allocated to one of two treatment arms.

In the Experimental Arm, participants will receive Golcadomide + R-CHOP (which consists of Rituximab targeted therapy + Cyclophosphamide, Doxorubicin, Vincristine and Prednisone chemotherapy).

In the Placebo Comparator Arm, participants will receive a placebo + the R-CHOP regimen.

Please note, Austin Health is currently only recruiting people with diffuse large B-cell lymphoma (DLBCL).

Conditions

This trial is treating people with previously untreated high-risk large B-cell lymphoma

Eligibility

Inclusion

- Histologically confirmed (per local evaluation) diagnosis of de novo, previously untreated large B-cell lymphoma (LBCL) according to 2022 world health organization (WHO) classification including:

i) Diffuse large B-cell lymphoma (DLBCL), not otherwise specified [including germinal center B-cell (GCB) and activated B-cell (ABC) types]

ii) High-grade B-cell lymphoma, with MYC and BCL2 rearrangements

iii) High-grade B-cell lymphoma, not otherwise specified

iv) T-cell/histiocyte/rich large B-cell lymphoma (THRLBCL)

v) Epstein-Barr virus + DLBCL

  • International Prognostic Index (IPI) score 1 or 2 with lactate dehydrogenase (LDH) ≥ 1.3 x upper limit of normal (ULN) and/or bulky disease defined as single lesion of ≥ 7 cm OR IPI ≥ 3.
  • Measurable disease defined by at least 1 fluorodeoxyglucose (FDG)-avid lesion for FDG-avid subtype and 1 bi-dimensionally measurable (> 1.5 cm in longest diameter) disease by computed tomography (CT) or magnetic resonance imaging (MRI), as defined by the Lugano classification.
  • Must have Ann Arbor Stage II-IV disease.

Exclusion

  • Any significant medical condition, active infection, laboratory abnormality, or psychiatric illness that would prevent the participant from participating in the study.
  • Any other subtype of lymphoma. Cases of primary mediastinal (thymic) large B-cell lymphoma (PMBCL), primary cutaneous DLBCL-leg type, Grade 3b FL, FL transformed to a-BCL, Anaplastic lymphoma kinase (ALK) positive large B-cell lymphoma, primary effusion lymphoma, and Burkitt lymphoma.
  • Documented or suspected central nervous system (CNS) involvement by lymphoma.
  • Other protocol-defined Inclusion/Exclusion criteria apply.

Inclusion

  • You have been diagnosed with cancer, but have not received any treatment.

Exclusion

  • You have certain types of non-cancer medical conditions.
Message

Clinical trials have complex eligibility criteria, and other criteria may apply for this trial. Ask your doctor about whether this trial could be right for you.

Participating hospitals

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No longer recruiting (closed or complete) hospitals

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More information

Trial Identifiers

Information on this page is partially produced from ClinicalTrials.gov *. View further details about this trial on the registry via the links below:

  • NCT06356129 *
  • CA073-1020; 2023-510178-15; U1111-1300-8493

Trial sponsor

Celgene

Scientific Title

A Phase 3, Multicenter, Randomized, Double-blind, Placebo-controlled Study Comparing the Efficacy and Safety of Golcadomide Plus R-CHOP Chemotherapy vs Placebo Plus R-CHOP Chemotherapy in Participants With Previously Untreated High-risk Large B-cell Lymphoma

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