A Clinical Trial of P134 Cells in Recurrent Glioblastoma

A Phase I/II Clinical Study to Evaluate the Safety and Efficacy of P134 Cells in the Treatment of Recurrent Glioblastoma

This is an open-label, single-arm, dose-escalation and expansion Phase 1/2 clinical trial designed to evaluate the safety, tolerability and efficacy of P134 cells in patients with recurrent glioblastoma, to explore the maximum tolerated dose (MTD)and recommended Phase 2 dose (RP2D), and to characterize the cytokinetic profile of CAR-T cells in the cerebrospinal fluid of patients. Eligible participants are adults diagnosed with recurrent or progressive glioblastoma who are confirmed as grade 4 glioblastoma (IDH wild-type) by histopathology or molecular pathology.

P134 cells are CD44/CD133 dual-targeting CAR-T cells developed by the research team led by Academician Jiang Tao and Professor Zhang Wei from the Beijing Neurosurgical Institute and the Department of Neurosurgery, Beijing Tiantan Hospital. This study is spearheaded by Professor Zhang Wei of the Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, China, with scientific oversight and guidance provided by Academician Jiang Tao of the Chinese Academy of Engineering.

Study Overview

• Status: Recruiting
• Conditions: Recurrent Glioblastoma IDH Wildtype
• Intervention / Treatment: Biological: P134 cell injection

• Study Type: Interventional
• Enrollment (Estimated): 26
• Phase: Phase 2; Phase 1

Contacts and Locations

• Study Contact: Name: Zhang Yuping; Phone Number: +8615022490519; Email: zhangyuping90@taslypharma.com

Study Locations

• China
  • Beijing, China
    • Recruiting
    • Beijing Tiantan Hospital, Capital Medical University
    • Contact: Li Nannan, Dr.; Phone Number: +8613284616878; Email: Nannanli1992@163.com
    • Principal Investigator: Zhang Wei, Prof.
    • Sub-Investigator: Li Guanzhang, Dr.
    • Sub-Investigator: Li Nannan, Dr.

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Voluntary written informed consent.
2. 18-70 years of age (inclusive), male or female.
3. 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).
4. 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).
5. At least one measurable lesion meeting RANO 2.0 criteria and having a radiographically assessed measurable lesion ≤ 3 cm in longest diameter
6. Patient has received prior radiation therapy and/or temozolomide/bevacizumab.
7. The investigator confirmed that the patient was suitable for craniotomy cerebrospinal fluid shunt and accessory (Ommaya reservoir) implantation.

Exclusion Criteria:

1. Highly allergic constitution or history of severe allergy, or allergy to related cell products
2. 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.
3. 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).
4. Tumor metastasis to the brainstem or spinal cord.
5. 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.
6. 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).
7. 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).
8. Trial participants who have a previous history of allogeneic bone marrow transplantation or organ transplantation, or are awaiting organ transplantation.
9. HBsAg positive and HBV DNA positive, HCV Ab positive and HCV RNA positive; Treponema pallidum antibody positive; human immunodeficiency virus (HIV) antibody positive.
10. Prior receipt of any gene therapy or cell therapy trial participant.
11. Pregnant or lactating women.
12. 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).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: P134 cell

Biological: P134 cell injection; In Phase 1 dose-escalation study, P134 cell dosing and safety are evaluated using an accelerated titration initial dose followed by a "3+3" design. The starting dose is 1 × 10⁸ CAR⁺ T cells, administered intratumorally or intraventricularly via an Ommaya reservoir. Three dose levels are planned: Level 1: 1 × 10⁸ CAR⁺ T cells, Q2W. Level 2: 3 × 10⁸ CAR⁺ T cells, Q2W. Level 3: 5 × 10⁸ CAR⁺ T cells, Q2W. The Level 1 adopts accelerated titration, and the Level 2 and Level 3 adopt the "3+3" design. In Phase 2 dose expansion, one or two dose levels will be selected based on integrated safety, efficacy, and other relevant data. Up to 10 participants will be enrolled per dose level (including subjects from the dose-escalation study).Participants will be enrolled sequentially from the lower dose level to the higher dose level: enrollment at the lower dose level will be completed first, followed by enrollment at the higher dose level.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Dose limiting toxicities (DLTs)	Proportion of participants with dose-limiting toxicities (DLTs) as assessed by CTCAE version 6.0 in the dose-escalation phase	From the first dose up to Day 28 post-first dose
Adverse events (AEs)	Incidence and severity of adverse events (safety and tolerability) as assessed by CTCAE version 6.0 in the dose-escalation phase.	Through study completion, an average of two and a half years
Maximum tolerated dose (MTD)	The highest dose level with less than 33% of participants experiencing dose-limiting toxicities (DLTs) as assessed by CTCAE version 6.0 in the dose-escalation phase.	From the first dose up to Day 28 after the first dose.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Recommended Phase 2 Dose (RP2D)	The optimal dose level identified based on the safety data (incidence of adverse events, dose-limiting toxicities [DLTs]), preliminary efficacy data , and pharmacodynamic data in the dose-escalation phase.	From study enrollment to Day 28 after the last dose of participants in the dose-escalation phase
Objective Response Rate (ORR)	the proportion of participants who achieve a complete response (CR) or partial response (PR) as assessed by RANO 2.0 criteria.	Through study completion, an average of two and a half years
Disease Control Rate (DCR)	the proportion of participants who achieve a complete response (CR), partial response (PR), or stable disease (SD) as assessed by RANO 2.0 criteria.	Through study completion, an average of two and a half years
Progression-Free Survival (PFS)	The time from study enrollment to the first occurrence of disease progression (as assessed by RANO 2.0) or death from any cause, whichever occurs first	Through study completion, an average of two and a half years
Duration of Response (DOR)	The time from the first documentation of a complete response (CR) or partial response (PR) (as assessed by RANO 2.0) to the first documentation of objective tumor progression or death from any cause, whichever occurs first.	Through study completion, an average of two and a half years
Time to Response (TTR)	the time from study enrollment to the first documentation of a complete response (CR) or partial response (PR) as assessed by RANO 2.0	Through study completion, an average of two and a half years
1-year OS Rate	the proportion of participants who are still alive 12 months after study enrollment	From study enrollment up to 12 months after study enrollment
Overall Survival	The time from study enrollment to death from any cause	Through study completion, an average of two and a half years

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Cytokinetics	The number of CAR-positive (CAR+) cells in cerebrospinal fluid (CSF) measured by flow cytometry, expressed as cells per milliliter (cells/mL).	From within 24 hours before the first CAR-T cell infusion through Day 28 after the last infusion, an average duration of five months
Cytokinetics	The copy number of CAR genes in the cerebrospinal fluid (CSF) of participants.	From within 24 hours before the first CAR-T cell infusion through Day 28 after the last infusion, an average duration of five months
Immunogenicity	The incidence of patients with positive serum anti-CAR molecular antibodies	From within 24 hours before the first CAR-T cell infusion through Day 28 after the last infusion, an average duration of five months.

Collaborators and Investigators

• Sponsor: Tasly Pharmaceutical Group Co., Ltd
• Investigators: Principal Investigator: Zhang Wei, Prof., Beijing Tiantan Hospital, Capital Medical University, Beijing, P.R.China

Study record dates

Study Major Dates

• Study Start (Actual): January 5, 2026
• Primary Completion (Estimated): February 29, 2028
• Study Completion (Estimated): August 31, 2028

Study Registration Dates

• First Submitted: November 27, 2025
• First Submitted That Met QC Criteria: December 19, 2025
• First Posted (Actual): January 6, 2026

Study Record Updates

• Last Update Posted (Actual): February 18, 2026
• Last Update Submitted That Met QC Criteria: February 13, 2026
• Last Verified: February 1, 2026

More Information

Terms related to this study

• Other Study ID Numbers: TSL-B2172-001

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No