Administration of T Cells Expressing Chondroitin-Sulfate-Proteoglycan-4 Specific Chimeric Antigen Receptors (CAR) in Subjects With Head and Neck Squamous Cell Carcinoma (HNSCC)

Dose Limiting Toxicity

时间窗: Up to 4 weeks

An event will be considered a Dose limiting toxicity per NCI CTCAE version 5.0, the CRS Grading and ICANS grading criteria. * Grade 3-5 allergic reactions related to the CAR-T cell infusion. * A treatment-emergent Grade 3 CRS that does not improve to Grade 0-1 by 72 hours or Grade 4 CRS * Grade ≥3 ICANS that is unresponsive to the standard of care interventions and does not decrease to Grade ≤1 within 7 days or grade 4 ICANS of any duration that has evidence of cerebral edema and/or generalized convulsive status epilepticus. * Any treatment-emergent Grade 4 non-hematologic AE that does not resolve to Grade 2 within 7 days. * Any Grade 5 events are not due to the underlying malignancy.

Toxicity: Cytokine Release Syndrome (CRS)

时间窗: Up to 4 weeks

CRS will be graded according to the American Society for Transplantation and Cellular Therapy (ASTCT) CRS Consensus Grading. Grade 1 - Mild: Fever ≥38\^ o C, No hypotension, No hypoxia, Grade 2 - Moderate: Fever ≥38\^ o C, Hypotension not requiring vasopressors, Hypoxia requiring low-flow nasal cannula (≤6 L/minute) or blow-by, Grade 3 - Severe: Fever ≥ 38\^ o C, Hypotension requiring a vasopressor with or without vasopressin, Hypoxia requiring high-flow nasal cannula (\>6 L/minute), facemask, nonrebreather mask, or Venturi mask, Grade 4 - Life-threatening: Fever ≥38\^oC, Hypotension requiring multiple vasopressors (excluding vasopressin), Hypoxia requiring positive pressure (e.g. Continuous positive airway pressure, BiPAP, intubation, mechanical ventilation), Grade 5 - Death

Toxicity: Immune effector cell-associated neurotoxicity syndrome (ICANS)

时间窗: Up to 4 weeks

Neurotoxicity will be graded according to the Immune effector cell-associated neurotoxicity syndrome (ICANS) criteria. Immune effector cell-associated neurotoxicity syndrome (ICANS) symptoms will be graded according to the criteria outlined in the protocol on a scale from 1 (mild) to 4 (critical). Cytokine release syndrome (CRS) will be graded according to criteria outlined in the protocol on a scale from 1 (mild) to grade 5 (death).

Toxicity: NCI-CTCAE

时间窗: Up to 4 weeks

Toxicity will be graded as the Number of participants with adverse events (AE)s. AEs will be classified and graded according to the National Cancer Institute's Common Terminology Criteria for Adverse Events (NCI-CTCAE) version 5.0. Dose Limiting Toxicities (DLTs) is defined as at least possibly related to CAR.B7-H3T cell product administration.

Tumor inflammation-associated neurotoxicity (TIAN)

时间窗: Up to 4 weeks

TIAN will be assessed as a clinical endpoint using the Tumor Inflammation-Associated Neurotoxicity (TIAN) grading system, a standardized clinician-reported tool for evaluating the severity of neurotoxicity associated with tumor-related inflammatory responses, particularly following immunotherapy. Assessments will be based on neurological examination, mental status, cognitive function, focal neurological deficits, seizure activity, level of consciousness, functional status, and relevant diagnostic investigations (e.g., neuroimaging and cerebrospinal fluid analysis), as clinically indicated. Neurotoxicity will be graded on a four-level scale (Grades 1-4): Grade 1, mild symptoms; Grade 2, moderate symptoms requiring medical intervention or causing functional limitation; Grade 3, severe neurological impairment requiring hospitalization or significantly limiting self-care; and Grade 4, life-threatening neurotoxicity requiring urgent intensive management.