A Clinical Trial of P134 Cells in Recurrent Glioblastoma

Prior treatment

• Receipt of biologic anti-tumor therapy (including monoclonal or bispecific antibody-targeted therapy, immune checkpoint inhibitor therapy, etc.) within 6 weeks prior to PBMC collection; receipt of radiotherapy or surgery within 4 weeks prior to PBMC collection (excluding placement of vascular access devices; a 1-week washout period is acceptable for diagnostic biopsy surgeries); receipt of chemotherapy, hormone therapy (excluding hormone replacement therapy), or non-specific immunomodulatory therapy (such as interleukins, interferons, thymosin, cyclophosphamide, methotrexate, tumor necrosis factor, etc.) within 2 weeks prior to PBMC collection; receipt of traditional Chinese medicine therapy with a clear anticancer indication within 1 week prior to PBMC collection.
• The adverse reactions caused by previous anti-tumor treatment have not recovered to ≤ Grade 1 as evaluated by NCI CTCAE v6.0 (except alopecia, skin pigmentation, leukoplakia, etc. which are assessed as having no safety risk).
• Patients with primary immunodeficiency disease, autoimmune diseases requiring medication (such as Crohn 's disease, ulcerative colitis, rheumatoid arthritis, systemic lupus), or previous history of autoimmune diseases of the nervous system (such as multiple sclerosis, Parkinson' s disease).
• Receiving or requiring long-term use of immunosuppressive agents (except for physiological doses of systemic corticosteroids ≤ 10 mg/day prednisone equivalent, short-term ≤ 7 days corticosteroids for allergies, or topical glucocorticoids).
• Trial participants who have a previous history of allogeneic bone marrow transplantation or organ transplantation, or are awaiting organ transplantation.
• Prior receipt of any gene therapy or cell therapy trial participant.

Other illness

• Highly allergic constitution or history of severe allergy, or allergy to related cell products
• Suffering from other serious neurological diseases other than brain tumors, such as meningitis, encephalitis, myelitis and demyelination, myasthenic syndrome/myasthenia gravis, amyotrophic lateral sclerosis, spinal muscular atrophy, nerve paralysis, uncontrolled epilepsy, etc.
• HBsAg positive and HBV DNA positive, HCV Ab positive and HCV RNA positive; Treponema pallidum antibody positive; human immunodeficiency virus (HIV) antibody positive.
• History of malignancy other than glioma within 5 years (except for adequately treated carcinoma in situ, basal cell carcinoma of the skin, squamous cell carcinoma of the skin, localized prostate cancer, or stage I cervical cancer, which in the opinion of the investigator carries a minimal risk of recurrence).

Other

• Tumor metastasis to the brainstem or spinal cord.
• Pregnant or lactating women.

• Voluntary written informed consent.
• 18-70 years of age (inclusive), male or female.
• Recurrent or progressive glioblastoma, histopathologically or molecularly diagnosed consistent with grade 4 glioblastoma (IDH wild-type) (refer to WHO Classification of Central Nervous System Tumors, 5th Edition, 2021).
• Positive CD44 or CD133 antigen expression in tumor tissue confirmed by IHC, defined as ≥1% of tumor cells showing positive CD44 or CD133 IHC staining, regardless of intensity (applicable only in Phase II dose expansion study).
• At least one measurable lesion meeting RANO 2.0 criteria and having a radiographically assessed measurable lesion ≤ 3 cm in longest diameter
• Patient has received prior radiation therapy and/or temozolomide/bevacizumab.
• The investigator confirmed that the patient was suitable for craniotomy cerebrospinal fluid shunt and accessory (Ommaya reservoir) implantation.