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BOXR1030 T Cells in Subjects With Advanced GPC3-Positive Solid Tumors

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ClinicalTrials.gov Identifier: NCT05120271
Recruitment Status : Recruiting
First Posted : November 15, 2021
Last Update Posted : March 9, 2023
SOTIO Biotech
Information provided by (Responsible Party):
SOTIO Biotech ( SOTIO, LLC )

Brief Summary:
This is a first-in-human (FIH), Phase 1, open-label, multicenter study to assess safety and determine the recommended Phase 2 dose (RP2D) of BOXR1030 administration after lymphodepleting chemotherapy (LD chemotherapy) in subjects with glypican-3 positive (GPC3+) advanced solid tumors.

Condition or disease Intervention/treatment Phase
Hepatocellular Carcinoma Squamous Cell Carcinoma of the Lung Merkel Cell Carcinoma Myxoid/Round Cell Liposarcoma Biological: CAR-GPC3 T Cells Phase 1 Phase 2

Detailed Description:
This is a first-in-human (FIH), Phase 1, open-label, multicenter study to assess safety and determine the recommended Phase 2 dose (RP2D) of BOXR1030 administration after lymphodepleting chemotherapy (LD chemotherapy) in subjects with glypican-3 positive (GPC3+) advanced solid tumors. Refer to the Study Schema for a diagram of the study flow. After signing informed consent and completing all screening assessments, eligible subjects will undergo leukapheresis to obtain T cells for BOXR1030 manufacturing. Subjects will receive a 7-day LD chemotherapy regimen with fludarabine and cyclophosphamide, administered according to institutional standard practice for these drugs at this dosage, including inpatient administration as appropriate. Subjects must be hospitalized for BOXR1030 administration and will remain hospitalized for 10 days after the infusion. If at least 2 cohorts complete the dose-limiting toxicity (DLT) assessment period with no DLTs and no severe/delayed events of cytokine release syndrome (CRS) or immune effector cell-associated neurotoxicity syndrome (ICANS), the Sponsor may allow subjects in subsequent cohorts to be discharged earlier, with daily follow-up clinic visits. For 28 days after BOXR1030 administration, all subjects must stay within a distance that requires no more than 2 hours of travel to the study site. During the Post-treatment Evaluation Period (6 months after BOXR1030 administration), study visits will occur daily for the first week, twice in the second week, and then at Weeks 3, 4, 6, and Months 2, 3, 4, 5, and 6. Safety (targeted physical examination, adverse event assessment, and clinical labs) will be evaluated and samples will be collected for endpoint analyses. For 28 days after BOXR1030 administration, subjects will be required to monitor their temperature and complete neurological evaluation via the immune effector cell-associated encephalopathy (ICE) assessment tool every day (to be administered by a caregiver at home on non-clinic days). At regular intervals, antitumor activity will be assessed per RECIST Version 1.1 and iRECIST criteria. After 6 months of follow-up from BOXR1030 administration, subjects will enter the Long-term Follow-up Period for a total duration of 15 years after BOXR1030 dosing. Study visits are scheduled every 3 months from Month 9 to Month 24, every 6 months thereafter until Year 5, and then annually through Year 15. Long-term follow-up assessments will focus on long-term safety and disease status.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 98 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A First-in-Human, Phase 1/2, Dose Escalation Study of BOXR1030 T Cells in Subjects With Advanced GPC3-Positive Solid Tumors
Actual Study Start Date : May 18, 2022
Estimated Primary Completion Date : July 2024
Estimated Study Completion Date : July 2039

Arm Intervention/treatment
Experimental: GPC3 positive solid tumors
One time i.v. administration of BOXR1030 after completion of cyclophosphamide and fludarabine lymphodepleting chemotherapy
Biological: CAR-GPC3 T Cells
Three dose levels each with lymphodepleting chemotherapy
Other Name: BOXR1030

Primary Outcome Measures :
  1. Dose limiting toxicity [ Time Frame: 28 days ]

  2. Maximum tolerated dose [ Time Frame: 28 days ]
    Tolerability evaluation

  3. Treatment emergent adverse event [ Time Frame: 28 days ]
    Incidence rate

  4. Adverse event of special interest [ Time Frame: 28 days ]
    Incidence rate

Secondary Outcome Measures :
  1. Overall response rate [ Time Frame: 6 weeks ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Aged 18 to 80 years at time of enrollment
  2. Able to provide a recent tumor specimen taken since the time of the subject's most recent systemic anticancer therapy, for GPC3 expression assessment by IHC.
  3. Histologically confirmed advanced unresectable or metastatic hepatocellular carcinoma (HCC), squamous cell carcinoma (SCC) of the lung, myxoid/round cell iposarcoma (MRCLS), or Merkel cell carcinoma (MCC) with GPC3 overexpression by IHC. Subjects must consent to IHC testing in a separate informed consent. Note: Tumor samples will be sent to a central laboratory for GPC3 expression analysis.
  4. Documentation of disease progression or refractory disease or intolerance to prior lines of standard-of-care (SOC) therapies. Patients with tumors with genetic alterations and mutations (eg, breast cancer gene [BRCA], epidermal growth factor receptor [EGFR] mutations, and anaplastic lymphoma kinase [ALK] translocation) who have approved targeted therapies available for their cancer will need to have been treated with such approved therapies or refused such approved targeted therapy for their cancer prior to enrolling in this study.
  5. Life expectancy >16 weeks
  6. Have adequate organ/renal function
  7. Left ventricular ejection fraction (LVEF) ≥50% by multiple-gated acquisition (MUGA) scan or echocardiogram (ECHO)
  8. Eastern Cooperative Group performance status of 0 to 1
  9. For subjects with HCC:

    • Child-Pugh Score of A
    • No fibrolamellar carcinoma or mixed hepatocellular cholangiocarcinoma histology
    • No moderate or severe ascites
  10. A minimum of 2 sites of disease, including at least 1 site that is measurable by RECIST Version 1.1 criteria to ensure sufficient disease for response assessment. At least 1 of the other lesions must be considered adequate for protocol-required tumor biopsy. Consider prioritization of percutaneous lesions that are palpable, or guided by imaging if necessary, and exclude biopsies of any lesions that are in proximity to vital visceral, cardio-pulmonary, or any neurovascular structures. A single site of disease is considered adequate to allow for response assessment and protocol-required tumor biopsies if it measures at least 2 cm in the shortest axis).
  11. Adequate wash-out of prior systemic therapy for underlying malignancy, relative to leukapheresis:

    • Last dose of any antineoplastic treatment must be at least 2 weeks before leukapheresis.
    • Last dose of any investigational agent must be at least 3 half-lives of the treatment, or 28 days, before leukapheresis (whichever is shorter). Adequate wash-out of prior systemic therapy for underlying malignancy, relative to LD chemotherapy:
    • The last dose of systemic nitrosourea or systemic mitomycin-C must be at least 6 weeks before the first dose of LD chemotherapy in this study.
    • For all other for systemic cytotoxic chemotherapy, the wash-out must be the duration of a full cycle of that therapy. For example, if the prior therapy is given in 3-week cycles, there must be at least 3 weeks between the last dose of that therapy and the first dose of LD chemotherapy in this study. If the prior therapy is administered more frequently than every 2 weeks, a minimum 2-week wash-out is required.
    • For biologic therapy (eg, antibodies) the wash-out must be either the duration of the biologic agent dosing interval, or 3 weeks, whichever is shorter.
    • For small molecule therapies, the wash-out must be 5 half-lives of the drug.
    • For any investigational agent, the wash-out must be 3 half-lives of the investigational agent, or 4 weeks, whichever is shorter.

    Note: Local radiation of lesions is allowed if indicated for palliation; locally treated lesions will be considered non-target lesions. Hormone ablation is also allowed as clinically indicated.

  12. Subjects or their legally acceptable representative must be able and willing to:

    • Provide IRB/IEC-approved written informed consent in accordance with regulatory and institutional guidelines. This must be obtained before the performance of any protocol related procedures that are not part of normal patient care.
    • Comply with the study protocol and with the planned biopsy procedures.
  13. Willing and able to commit to study assessments and visit schedule, including availability of a caregiver to conduct daily neurological assessments for 28 days after BOXR1030 administration.
  14. For women of childbearing potential (defined as physiologically capable of becoming pregnant), confirmation of a negative serum pregnancy test and agreement to use of highly effective contraception per Clinical Trials Facilitation and Coordination Group (CTFG) criteria from screening through the first 12 months after BOXR1030 administration. For men with partners of childbearing potential, agreement to use effective barrier contraception from screening through the first 12 months after BOXR1030 administration.

Exclusion Criteria:

  1. Prior treatment with adoptive cell therapy (eg, CAR T-cell therapy, natural killer cell therapy, engineered T-cell receptor therapy).
  2. History of allogenic hematopoietic stem cell transplant (HSCT).
  3. Untreated central nervous system (CNS) tumors or brain metastasis. Patients are eligible if CNS metastases are asymptomatic and have been treated and patients have neurologically returned to baseline (residual signs or symptoms related to the CNS treatment are permitted). Imaging obtained for the purpose of CNS metastases management performed within 28 days prior to Day 1 must document radiographic stability of CNS lesions and be performed after completion of any CNS directed therapy. CNS evaluation for asymptomatic patients is not required for the study. Patients with leptomeningeal metastases are excluded.
  4. Patients who have not recovered to ≤ Grade 1 or baseline from all AEs due to previous therapies (patients with ≤ Grade 2 neuropathy that has been stable for at least 4 weeks or ≤ Grade 2 endocrine-related AEs that has been stable for at least 4 weeks on replacement therapy).
  5. Planned use of any antineoplastic treatment or investigational agent from the time of the first dose of LD chemotherapy through the end of study participation, except for allowed local radiation of lesions for palliation (to be considered non-target lesions after treatment) and hormone ablation.
  6. Uncontrolled or life-threatening symptomatic concomitant disease including clinically significant gastrointestinal bleeding or pulmonary hemorrhage within 4 weeks before screening, known symptomatic human immunodeficiency virus (HIV) positive with an acquired immunodeficiency syndrome (AIDS)-defining opportunistic infection within the last year, or a current CD4 count <350 cells/uL, symptomatic active hepatitis B or C checked at screening, or active tuberculosis. Patients with HIV are eligible if:

    • They have received antiretroviral therapy (ART) as clinically indicated for at least 4 weeks prior to starting study treatment
    • They continue on ART as clinically indicated while enrolled on study
    • CD4 counts and viral load are monitored per standard of care by a local health care provider
  7. Has undergone a major surgery within 3 weeks of starting study treatment or has inadequate healing or recovery from complications of surgery prior to starting study treatment.
  8. Has received prior radiotherapy within 2 weeks of start of study treatment. Subjects must have recovered from all radiation-related toxicities, not require corticosteroids, and not have had severe radiation pneumonitis. A 1-week wash-out is permitted for palliative radiation (≤2 weeks of radiotherapy) to non-CNS disease.
  9. Potentially life-threatening second malignancy requiring systemic treatment within the last 3 years (ie, patients with a history of prior malignancy are eligible if treatment was completed at least 3 years before entering the Treatment Period and the patient has no evidence of disease) or which would impede evaluation of treatment response. Hormone ablation therapy is allowed within the last 3 years. Patients with history of prior early stage basal/squamous cell skin cancer or non-invasive or in situ cancers that have undergone definitive treatment at any time are eligible.
  10. Clinically significant (ie, active) cardiovascular disease: cerebral vascular accident/stroke (<6 months prior to enrollment), myocardial infarction (<6 months prior to enrollment), unstable angina, congestive heart failure (≥ New York Heart Association Classification Class II), or the presence of any condition that can increase proarrhythmic risk (eg, hypokalemia, bradycardia, heart block) including any new, unstable, or serious cardiac arrhythmia requiring medication, or other baseline arrhythmia that might interfere with interpretation of electrocardiograms (ECGs) on study (eg, bundle branch block). Patients with QTcF >450 msec for males and >470 msec for females on screening ECG are excluded. Any patients with a bundle branch block will be excluded with QTcF >450 msec. Males who are on stable doses of concomitant medication with known prolongation of QTcF (eg, selective serotonin re-uptake inhibitor antidepressants) will only be excluded for QTcF >470 msec.
  11. Has an active infection requiring systemic therapy.
  12. A woman of child-bearing potential (WOCBP) who has a positive pregnancy test prior to treatment.
  13. Is breastfeeding or expecting to conceive or father children within the projected duration of the study, starting with the Screening Visit through 6 months after the last dose of study treatment.
  14. Unable to receive any of the agents used in this study due to history of severe immediate hypersensitivity reaction (eg, hypersensitivity to dimethyl sulfoxide [DMSO]).
  15. Known allergy or contraindication to any of the LD chemotherapy or prophylaxis medications required during the study.
  16. Any other significant co-morbid disease or condition which, in the judgment of the Investigator, would put the subject at undue risk (eg, cirrhotic liver disease).

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05120271

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Contact: Janine McDermott (617) 904-7600 B1030_101@sotio.com

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United States, Texas
Baylor Scott and White Research Institute Recruiting
Dallas, Texas, United States, 75246
Contact: Joyce Ghormley    214-818-8961    joyce.ghormley@bswhealth.org   
Principal Investigator: Scott Paulson, MD         
University of Texas MD Anderson Cancer Center Recruiting
Houston, Texas, United States, 77030-4008
Contact: Andrea Palmieri    713-563-6018    aphempstead@mdanderson.org   
Principal Investigator: Ecaterina Dumbrava, MD         
United States, Wisconsin
Froedtert and Medical College of Wisconsin Recruiting
Milwaukee, Wisconsin, United States, 53226
Contact: Julia Frasch    414-805-5026    jfrasch@mcw.edu   
Contact: Kayla Peterson    414-805-0769    Kpeterson@mcw.edu   
Principal Investigator: Jonathan Thompson, MD         
Sponsors and Collaborators
SOTIO Biotech
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Study Director: Frank Richard, MD, MBA SOTIO Biotech AG
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
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Responsible Party: SOTIO, LLC
ClinicalTrials.gov Identifier: NCT05120271    
Other Study ID Numbers: B1030-101
First Posted: November 15, 2021    Key Record Dates
Last Update Posted: March 9, 2023
Last Verified: December 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
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Carcinoma, Merkel Cell
Lung Neoplasms
Liposarcoma, Myxoid
Neoplasms, Glandular and Epithelial
Neoplasms by Histologic Type
Neoplasms by Site
Neoplasms, Adipose Tissue
Neoplasms, Connective and Soft Tissue
Polyomavirus Infections
DNA Virus Infections
Virus Diseases
Tumor Virus Infections
Carcinoma, Neuroendocrine
Neuroendocrine Tumors
Neuroectodermal Tumors
Neoplasms, Germ Cell and Embryonal
Neoplasms, Nerve Tissue
Respiratory Tract Neoplasms
Thoracic Neoplasms
Lung Diseases
Respiratory Tract Diseases