SB-4826 in Adult Participants With Locally Advanced or Metastatic Solid Tumors or Non-Hodgkin Lymphomas

NCT07222631 | Recruiting Phase 1 DMC FDA Drug

• 1 other identifier: 812350
• Study Type: interventional
• Target: 48
• Locations: 1 country
• Sites: 1

Brief Summary

The goal of this clinical trial is to learn what dose of the drug SB-4826 can be given safely in patients with solid tumors and non-Hodgkin lymphomas. This drug will be used alone in patients with solid tumors, and will be used alone or in combination with rituximab in patients with non-Hodgkin lymphomas. The main questions this clinical trial aims to answer are: What is the maximum dose of SB-4826 that can be used safely in patients with solid tumors and non-Hodgkin lymphomas, and will it work? How does SB-4826 work in people with cancer? How is SB-4826 absorbed, broken down, and excreted by the body? Participants will: Take drug SB-4826 twice weekly for up to 1 year; keep a diary of when they take SB-4826 at home; visit the clinic for checkups, tests, and fill out study questionnaires.

Conditions

Non Hodgkin Lymphoma; Solid Tumor

Outcome Measures

Primary Outcomes (2)

• Phase 1 (Dose-Escalation): Recommended phase 2 dose of SB-4826

  To determine the recommended phase 2 dose of SB-4826, separately for each group. The recommended phase 2 dose will be the optimal biological dose based on consideration of safety (e.g., dose limiting toxicity, maximum tolerated dose, treatment-related adverse events) information together with all available pharmacokinetics, pharmacodynamics, and efficacy data. The recommend phase 2 dose will not exceed the maximum tolerated dose, which is the dose-level determined by the Bayesian Optimal Interval design with a target toxicity rate of 30% within the first 21 days.

  21 days

• Phase 2 (Dose-Expansion/ Combination Therapy): Efficacy of SB-4826 at the recommended phase 2 dose.

  Objective response rate defined as the percentage of participants having a complete response or partial response within 6 months of the first dose of study therapy, as determined by investigator assessment per 2016 Lugano Classification criteria.

  6 months

Study Arms (4)

Locally advanced or metastatic solid tumors Phase 1 monotherapy

EXPERIMENTAL

Phase 1 dose escalation SB-4826 monotherapy

Drug: SB-4826

Non-Hodgkin lymphoma Phase 1 monotherapy

EXPERIMENTAL

Phase 1 dose escalation SB-4826 monotherapy

Drug: SB-4826

Non-Hodgkin lymphoma Phase 1 combination therapy

EXPERIMENTAL

Phase 1 dose escalation SB-4826 in combination with rituximab

Drug: SB-4826; Drug: Rituximab

Non-Hodgkin lymphoma Phase 2 combination therapy

EXPERIMENTAL

Phase 2 dose expansion SB-4826 in combination with rituximab

Drug: SB-4826; Drug: Rituximab

Interventions

SB-4826 DRUG

Small ubiquitin-like modifier E1 inhibitor

Locally advanced or metastatic solid tumors Phase 1 monotherapy; Non-Hodgkin lymphoma Phase 1 combination therapy; Non-Hodgkin lymphoma Phase 1 monotherapy; Non-Hodgkin lymphoma Phase 2 combination therapy

Rituximab DRUG

Cluster of differentiation 20 blocker

Also known as: Rituxan

Non-Hodgkin lymphoma Phase 1 combination therapy; Non-Hodgkin lymphoma Phase 2 combination therapy

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Aged 18 and older.
• Capable of giving signed informed consent.
• Phase 1 (Dose-Escalation): Histologically or cytologically confirmed locally advanced or metastatic solid tumor or non-Hodgkin lymphomas. For indolent non-Hodgkin lymphomas, there must be an indication for systemic therapy such as: Local symptoms due to progressive or bulky nodal disease; Threat of or present compromise of normal organ function due to progressive or bulky disease; Presence of systemic B symptoms (ie, fevers, weight loss, night sweats); Presence of symptomatic extranodal disease, such as effusions; Cytopenias due to bone marrow infiltration, autoimmune hemolytic anemia or thrombocytopenia, or hypersplenism; An increase in disease tempo.
• Phase 2 (Dose-Expansion/ Combination Therapy): Histologically or cytologically confirmed non-Hodgkin lymphomas. For indolent non-Hodgkin lymphomas, there must be an indication for systemic therapy such as: Local symptoms due to progressive or bulky nodal disease; Threat of or present compromise of normal organ function due to progressive or bulky disease; Presence of systemic B symptoms (ie, fevers, weight loss, night sweats); Presence of symptomatic extranodal disease, such as effusions; Cytopenias due to bone marrow infiltration, autoimmune hemolytic anemia or thrombocytopenia, or hypersplenism; An increase in disease tempo. Patients must be planned to receive rituximab as standard of care (on label or medically accepted) treatment for NHL.
• Participant's malignancy has relapsed after, progressed on, is not a candidate for, is intolerant of, or refuses standard of care therapies.
• For solid cancer, at least one measurable lesion based on response evaluation criteria in solid tumors (RECIST v1.1).
• Adequate hematologic parameters unless cytopenia are due to malignancy (i.e. marrow involvement): Hemoglobin ≥ 8 g/dL; Absolute neutrophil count ≥ 1000/microliter or ≥ 750/microliter if Duffy null phenotype; Platelet count ≥ 50,000/microliter.
• Adequate organ function defined as: Calculated creatinine clearance ≥ 60 mL/min; Serum alanine aminotransferase and aspartate aminotransferase ≤ 1.5 x upper limit of normal; Total bilirubin ≤ 1.5 x upper limit of normal (for participants with known Gilbert's syndrome, direct bilirubin must be ≤ 1.5 x upper limit of normal).
• All adverse events related to prior therapy or disease (except alopecia) have resolved to grade 2 or less.
• Life expectancy ≥ 3 months.
• Eastern Cooperative Oncology Group Performance Status: ≤ 2
• Female Participants: A female participant is eligible to participate if she is not pregnant or breastfeeding, and one of the following conditions applies: Is a woman of nonchildbearing potential (WONCBP) OR is a woman of childbearing potential (WOCBP) and using a contraceptive method that is highly effective (with a failure rate of \<1% per year), with low user dependency during the study intervention period and for at least 1 month in the monotherapy group and 12 months in the SB-4826 plus rituximab group. The 1-month timeframe after the last study dose of SB-4826 is a conservative time frame based on the fact that 1 week corresponds to 7 half-lives. Contraception after the last dose of rituximab is required for at least 12 months. The investigator should evaluate the potential for contraceptive method failure (e.g., nonadherence, recently initiated) in relationship to the first dose of study intervention. A WOCBP must have a negative highly sensitive pregnancy test (urine or serum with sensitivity of at least 25 mIU/mL) within 24 hours before the first dose of study drug.
• Male Participants: Male participants are eligible to participate if they agree to the following during the study intervention period and for at least 3 months after the last study dose. The 3-month timeframe is based on spermatogenesis (74 days) plus at least 1week after the last study dose of SB-4826 (1 week is approximately 7 half-lives). No precautions are required for rituximab. Male participants must refrain from donating sperm plus either be abstinent from heterosexual intercourse as their preferred and usual lifestyle (abstinent on a long term and persistent basis) and agree to remain abstinent OR agree to use a male condom when having sexual intercourse with a woman of childbearing potential. Female partners of male participants who are WOCBP are permitted to use hormonal contraception and must have barrier method of contraception. Note: A male participant is considered able to father a child unless he has had a bilateral vasectomy with documented aspermia or a bilateral orchiectomy.

You may not qualify if:

• Inability to take oral medications.
• Use of systemic cancer therapy (e.g., chemotherapy, immunotherapy, biologic, hormonal therapy) within 21 days or 5 half-lives, whichever is shorter.
• Palliative radiation within 7 days before first dose of study drug.
• Use of cellular therapy within 60 days before first dose of study drug.
• Major surgery within 30 days before first dose of study drug.
• Prior solid organ transplant.
• Clinically significant cardiovascular disease including any of the following within 6 months before first dose of study drug: myocardial infarction or coronary artery bypass grafting, unstable angina pectoris, serious cardiac ventricular arrhythmia requiring medication, congestive heart failure per New York Heart Association class III or IV, cerebrovascular accident, or poorly controlled hypertension.
• History of any other malignancy in the past 2 years other than completely resected nonmelanoma skin cancer or carcinoma in situ of the uterine cervix, anus, prostate, bladder, breast, or indolent malignancies that do not require treatment.
• History of or current chronic liver disease, such as active viral hepatitis, drug- or alcohol-related liver disease, metabolic dysfunction-associated steatohepatitis, autoimmune hepatitis, hemochromatosis, Wilson's disease, alpha-1 antitrypsin deficiency, primary biliary cholangitis, primary sclerosing cholangitis, or any other liver disease considered clinically significant by the investigator.
• Mean resting corrected QT interval using Fridericia's formula \> 470 msec.
• Active infection that necessitates treatment within 14 days of first dose of study drug.
• Active hepatitis B or hepatitis C infection regardless of viremia.
• Known history of human immunodeficiency virus infection with viral load \>50 copies/ml at the time of screening.
• Active autoimmune disease requiring \>10 mg of prednisone daily or equivalent, disease-modifying antirheumatic drugs, or immunosuppression.
• Use of medications that are known to be sensitive narrow therapeutic index or moderate sensitive substrates, strong or moderate inhibitors or strong or moderate inducers of cytochrome P450 3A4/5, or sensitive substrates or inhibitors of P-glycoprotein, breast cancer resistant protein, or organic anion-transporting polypeptide 1B1/1B3 within 14 days or 5 half-lives, whichever is longer, before first dose of study drug.

Sponsors & Collaborators

• The Institute for Follicular Lymphoma Innovation: collaborator
• University of California, San Diego: lead

Study Sites (1)

University of California, San Diego

La Jolla, California, 92093, United States

RECRUITING

MeSH Terms

Conditions

Lymphoma, Non-Hodgkin

Interventions

Rituximab

Condition Hierarchy (Ancestors)

Lymphoma; Neoplasms by Histologic Type; Neoplasms; Lymphoproliferative Disorders; Lymphatic Diseases; Hemic and Lymphatic Diseases; Immunoproliferative Disorders; Immune System Diseases

Intervention Hierarchy (Ancestors)

Antibodies, Monoclonal, Murine-Derived; Antibodies, Monoclonal; Antibodies; Immunoglobulins; Immunoproteins; Blood Proteins; Proteins; Amino Acids, Peptides, and Proteins; Serum Globulins; Globulins

Study Officials

• Peter Vu, MD

  University of California, San Diego

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Peter Vu, MD

CONTACT

858-822-5354; CancerCTO@health.ucsd.edu

Experimental Therapeutics Research Team

CONTACT

858-822-5354; CancerCTO@health.ucsd.edu

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Professor of Medicine

Study Record Dates

• First Submitted: October 28, 2025
• First Posted: October 30, 2025
• Study Start: February 18, 2026
• Primary Completion (Estimated): February 1, 2031
• Study Completion (Estimated): February 1, 2033
• Last Updated: March 5, 2026

Record last verified: 2026-03

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)