Recruiting
Phase 1

FT536

Sponsor:

Masonic Cancer Center, University of Minnesota

Code:

NCT07560865

Conditions

Astrocytoma

Glioblastoma

Progressive Disease

Eligibility Criteria

Sex: All

Age: 18 - 70+

Healthy Volunteers: Not accepted

Interventions

FT536

Biopsy/ Intratumoral Injection/ Gross Tumor Resection

Blood/ Cerebrospinal Fluid/ Tumor Pathology

Study Details

Brief summary:

This is a single center, first-in cancer-type phase I clinical trial of FT536 for adult patients with recurrent WHO Grade 4 astrocytoma, irrespective of IDH-mutational status, for which a standard of care repeat craniotomy for gross tumor resection at time of first or second recurrence is achievable. Per this treatment schema, FT536 will be administered once intratumorally

Conditions

Astrocytoma

Glioblastoma

Progressive Disease

Study ID

NCT07560865

Start date

Apr 23, 2026

Status verified date

Apr, 2026

Completion date

Jun 1, 2029

Anticipated

Primary completion date

Jun 1, 2028

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 70+

Healthy Volunteers: Not accepted

Inclusion Criteria:

  • Histologically confirmed WHO Grade 4 astrocytoma from archival tissue. IDH mutation status and MGMT promoter methylation status will not limit candidacy but needs to be known.
  • Evidence of first or second cancer recurrence/ progression by magnetic resonance imaging (MRI) for which a gross tumor resection (GTR) is feasible as determined by the primary investigator in concordance with the study-affiliated neurosurgeon.
  • Previous completed SOC antitumor treatment including surgery, radiation therapy, and temozolomide +/- Optune/ Tumor Treatment Fields (TTF).
  • No concurrent alternative curative therapy, including use of TTF.
  • Able to undergo standard MRI scans with contrast agent throughout the course of the study.
  • ≥ 18 years and ≤ 75 years of age at the time of consent.
  • Karnofsky performance status ≥70.
  • Must be completely off or on a dose of dexamethasone 2mg daily or less with stable neurological function at the time of enrollment.
  • Adequate organ function within 14 days of study treatment start as defined in Section 4.1.9 of the protocol.
  • Participants of childbearing potential (POCBP) or with partners of childbearing potential must use a highly effective form of contraception from the time of the screening visit until at least 3 months after the dose of FT536.
  • Must agree to and sign the consent for the companion Long-Term Follow-Up study (CPRC# 2021LS077).
  • Voluntary written consent prior to the performance of any research related procedures.
  • Agree to stay in the Twin Cities metropolitan area (i.e. within a 45-minute drive of the UMN) from the time of biopsy through hospital discharge following completion of the planned craniotomy.

Exclusion Criteria:

  • Clinically significant increased intracranial pressure (e.g., impending herniation or requirement for immediate palliative treatment) or uncontrolled seizures or any other situation requiring urgent neurosurgical intervention.
  • History of myelodysplastic syndrome (MDS)/ acute myeloid leukemia (AML) or with features suggestive of MDS/ AML.
  • Radiographic evidence of leptomeningeal disease.
  • Received prior treatment with bevacizumab or any other cellular therapy available on or off a clinical trial.
  • Non-malignant CNS disease such as CNS vasculitis or neurodegenerative disease.
  • Prior or current GammaTile, Gliadel wafer use, or other implanted therapeutic agent or photodynamic therapy.
  • Any known condition that requires systemic immunosuppressive therapy - inhaled and topical steroids are permitted.
  • Pregnant or breastfeeding. Menstruating POCBP must have a negative pregnancy test within 14 days before the planned biopsy. Patient must agree to use highly effective method of birth control from the time of the screening visit until at least 3 months after the dose of FT536.
  • Known seropositive for HIV or known Hepatitis B or C infection with detectable viral load by PCR.
  • Prior history of malignancy within 5 years of enrollment other than basal or squamous cell carcinoma of the skin, cervical intra-epithelial neoplasia, in situ carcinoma of the breast, or prostate cancer treated with surgery or RT with a prostate specific antigen of <0.01 ng/mL tested within 28 days of trial enrollment.
  • Uncontrolled intercurrent illness including, but not limited to ongoing or active infection, symptomatic congestive heart failure, unstable angina pec

Study Design

Enrollment

9 participants

Anticipated

Allocation

Non randomized

Intervention Model

Sequential

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Dose Level Cohort -1

FT536 1 x 10\^7 cells/dose. Used only if excess toxicity encountered on dose level 1.

experimental: Dose Level Cohort 1

FT536 2 x 10\^7 cells/dose

experimental: Dose Level Cohort 2

FT536 6 x 10\^7 cells/dose

Interventions

FT536

FT536 is an allogeneic natural killer (NK)-cell immunotherapy produced from a clonal master human induced pluripotent stem cell (iPSC) line with the following four engineered elements: a)deletion of the gene encoding CD38 (i.e., CD38 knockout); b) expression of the MICA andMICB (MICA/B) chimeric antigen receptor (CAR); c) high-affinity, non-cleavable CD16 receptor; and d) an interleukin (IL)-15/IL15 receptor alpha fusion protein.

Biopsy/ Intratumoral Injection/ Gross Tumor Resection

On Study Day 1, the region of radiographic concern is biopsied to histologically confirm cancer recurrence versus pseudoprogression. If intraoperative pathology is consistent with cancer recurrence, then FT536 will be injected with a total volume of 1 mL infused via a ventricular catheter placed along the biopsy tract. Occurring between Study Day 8-15, the patient will undergo maximum safe surgical resection

Blood/ Cerebrospinal Fluid/ Tumor Pathology

Blood analysis will occur throughout the study to determine the quality of endogenous NK cells and T cells as well as cytokine concentrations.

Cerebrospinal fluid sampling will occur at 2-3 time points throughout the study and the fluid will be analyzed for cytokines and immune cells.

Compare pre- (from biopsy) versus post- (from resection) injection pathology to determine FT536 motility, replication ability, and impact on the microenvironment as well as malignant astrocytoma cell death plus the persistence of endogenous NK cells

Primary outcome measure

  • Safety and Tolerability [ Time Frame: 1 year ]

Central Contacts and Locations

Locations

Elizabeth C. Neil, MD

Recruiting

Minneapolis, Minnesota, United States, 55455

Contacts

Elizabeth C. Neil, MD

612-273-8383neile@umn.edu

More Information

Sponsor

Masonic Cancer Center, University of Minnesota

Last update posted

May 1, 2026

Last verified

Apr, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-08. This information was provided to ClinicalTrials.gov by Masonic Cancer Center, University of Minnesota on 2026-05-01.