Clinical Trial on the Safety, Tolerance and Preliminary Efficacy of XH001 Injection Combined With Neoantigen Vaccine-induced Tumor-specific T-cell Injection in Advanced Gastric Cancer

A Single-center, Non-randomized, Open-label Clinical Trial to Evaluate the Safety, Tolerability and Preliminary Efficacy of XH001 Injection Combined With Neoantigen Vaccine-induced Tumor-specific T-cell Injection in Advanced Gastric Cancer.

The goal of this clinical trial is to learn the safety of tumor neoantigen vaccine combined with neoantigen vaccine induced T-cell in treating advanced gastric cancer in adults. It will also learn if the combined treatment works to treat advanced gastric cancer.

The main questions it aims to answer are:

What medical problems do participants have when using the combined treatment? Does tumor neoantigen vaccine combined with neoantigen vaccine induced T-cell eliminate or shrink the tumor, and can it prolong the patient's survival period?

Study Overview

• Status: Recruiting
• Conditions: Advanced Gastric Cancer
• Intervention / Treatment: Drug: XH001 Injection; Drug: Tumor vaccine-induced specific T-cell injection

• Study Type: Interventional
• Enrollment (Estimated): 18
• Phase: Phase 1

Contacts and Locations

• Study Contact: Name: JIA Wei, MD; Phone Number: 0086-025-83304616; Email: jiawei99@nju.edu.cn

Study Locations

• China
  • Jiangsu
    • Nanjing, Jiangsu, China
      • Recruiting
      • Nanjing Drum Tower Hospital
      • Contact: Jia Wei, MD; Phone Number: 0086-025-83304616

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

1. Provision of signed and dated informed consent form.
2. Aged between 18 and 70 years old, male or female.
3. Advanced gastric cancer that has been diagnosed by histological and/or cellular pathology, and which has failed to respond to second-line standard treatment or is intolerant to it, or is not suitable for standard treatment at this stage.
4. According to the RECIST 1.1 criteria for evaluating the efficacy of solid tumors, there must be at least one measurable lesion as the target lesion for efficacy evaluation. The total diameter of the overall tumor lesion (excluding bone metastases) should be ≤ 100mm, and the diameter of a single tumor lesion should be ≤ 30mm. If the lesion that has received local treatment (radiotherapy, ablation, vascular intervention, etc.) is the only lesion, then there must be clear imaging evidence of disease progression for this lesion.
5. Expected survival duration ≥ 12 weeks.
6. Adequate organ and bone marrow function.

Exclusion Criteria:

1. Requires long-term systemic administration of antiallergic drugs, or has severe hypersensitivity reactions (≥Grade 3) to XH001 injection and/or any of its excipients.
2. Central nervous system metastases with symptoms and without prior treatment, and/or meningeal metastases.
3. Having received immunomodulatory drug therapy within 2 weeks prior to the first administration day (D1) of XH001 injection.
4. Suffer from skin diseases that may prevent the intradermal injection from reaching the target area (such as psoriasis).
5. Subjects with toxic side effects from previous treatment that have not recovered to CTCAE grade≤2, excluding hair loss.
6. Subjects who received systemic steroid treatment (daily dose exceeding 10mg of prednisone equivalent) or any other form of immunosuppressive treatment within 7 days before the first administration of XH001 injection, excluding:1) Intranasal inhalation of local steroids or local steroid injection (such as intra-articular injection); 2) Systemic corticosteroid treatment not exceeding 10mg/day of prednisone or its equivalent physiological dose.
7. Subjects who have previously received therapeutic tumor vaccines or therapeutic cell therapy products.
8. Previously received allogeneic hematopoietic stem cell or allogeneic bone marrow transplantation, or previously received solid organ transplantation, or currently using immunosuppressive drugs.
9. Have active or poorly controlled severe infections during screening period.
10. Virological tests show positive for human immunodeficiency virus antibodies, hepatitis B surface antigen and/or hepatitis B core antibody with hepatitis B virus DNA > 1000 IU/ml, positive for hepatitis C virus antibodies, and positive for Treponema pallidum specific antibodies.
11. Patients with other malignancies within 5 years before enrollment, except for those with a history of appropriately treated and cured cervical carcinoma in situ, breast carcinoma in situ, or skin basal cell carcinoma.
12. Any history of autoimmune diseases.
13. Known to have active pulmonary tuberculosis (TB).
14. Patients who have received systemic chemotherapy, radiotherapy, molecular targeted therapy, biological immunotherapy, hormone therapy or unapproved clinical trial drugs/instruments within 2 weeks before screening.
15. Subjects who are still participating in other clinical trials during the screening period.
16. Pregnant or lactating women.
17. Other severe, acute, or chronic medical or psychiatric conditions, or laboratory abnormalities, that, to the investigator's discretion, may increase the risks of participating in the trial or may interfere with the interpretation of the trial results.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Sequential Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Tumor vaccine and tumor vaccine induced specific T-cell Arm 1; XH001 injection, 400 μg; Tumor specific T cell injection, Dose 1	Drug: XH001 Injection; mRNA tumor neoantigen vaccine; Drug: Tumor vaccine-induced specific T-cell injection; Adoptive Cell Transfer Therapy product
Experimental: Tumor vaccine and tumor vaccine induced specific T-cell Arm 2; XH001 injection, 400 μg; Tumor specific T cell injection, Dose 2	Drug: XH001 Injection; mRNA tumor neoantigen vaccine; Drug: Tumor vaccine-induced specific T-cell injection; Adoptive Cell Transfer Therapy product

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Adverse Event	Incidence and severity of adverse events (AEs), clinically significant abnormal changes in laboratory tests and other examinations (Based on Common Terminology Criteria for Adverse Events [CTCAE] v5.0).	12 months
Dose Limiting Toxicity	Safety events occurring within 28 days after the reinfusion of neoantigen vaccine-induced tumor-specific T cells and related to neoantigen vaccine-induced tumor-specific T cells.	From reinfusion of neoantigen vaccine-induced tumor-specific T cells to 28 days after the reinfusion.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
OS	Overall Survival	36 months
DCR	Disease Control Rate	24 months
ORR	Objective Response Rate	24 months
PFS	Progression-Free Survival	24 months
BOR	Best Overall Response	24 months
DOR	Duration of Response	24 months

Collaborators and Investigators

• Sponsor: Jia Wei
• Collaborators: NeoCura

Publications and helpful links

General Publications

• Rojas LA, Sethna Z, Soares KC, Olcese C, Pang N, Patterson E, Lihm J, Ceglia N, Guasp P, Chu A, Yu R, Chandra AK, Waters T, Ruan J, Amisaki M, Zebboudj A, Odgerel Z, Payne G, Derhovanessian E, Muller F, Rhee I, Yadav M, Dobrin A, Sadelain M, Luksza M, Cohen N, Tang L, Basturk O, Gonen M, Katz S, Do RK, Epstein AS, Momtaz P, Park W, Sugarman R, Varghese AM, Won E, Desai A, Wei AC, D'Angelica MI, Kingham TP, Mellman I, Merghoub T, Wolchok JD, Sahin U, Tureci O, Greenbaum BD, Jarnagin WR, Drebin J, O'Reilly EM, Balachandran VP. Personalized RNA neoantigen vaccines stimulate T cells in pancreatic cancer. Nature. 2023 Jun;618(7963):144-150. doi: 10.1038/s41586-023-06063-y. Epub 2023 May 10.

Study record dates

Study Major Dates

• Study Start (Actual): December 26, 2025
• Primary Completion (Estimated): June 1, 2028
• Study Completion (Estimated): November 1, 2029

Study Registration Dates

• First Submitted: November 26, 2025
• First Submitted That Met QC Criteria: December 19, 2025
• First Posted (Actual): December 23, 2025

Study Record Updates

• Last Update Posted (Actual): February 25, 2026
• Last Update Submitted That Met QC Criteria: February 23, 2026
• Last Verified: February 1, 2026

More Information

Terms related to this study

• Keywords: Advanced Gastric Cancer; Tumor neoantigen; Tumor neoantigen induced tumor-specific T -cell
• Other Study ID Numbers: XKY-C-008

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

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