Molecular Imaging of Gastric Cancer Metastatic Lymph Nodes with 99mTc-3PRGD2 Probe.

Trial Title: Molecular Imaging of Gastric Cancer Metastatic Lymph Nodes with 99mTc-3PRGD2 Probe.

NCT ID: NCT06435741

Condition: Stomach Neoplasm
Lymph Node Metastasis
RADIONUCLIDE IMAGING

Conditions: Official terms:
Neoplasm Metastasis
Stomach Neoplasms
Lymphatic Metastasis

Conditions: Keywords:
Gastric cancer
Lymph node metastasis
Tumor molecular imaging
Integrin
Fibroblast activating protein

Study type: Interventional

Study phase: N/A

Overall status: Not yet recruiting

Study design:

Allocation: N/A

Intervention model: Single Group Assignment

Primary purpose: Diagnostic

Masking: None (Open Label)

Intervention:

Intervention type: Diagnostic Test
Intervention name: 99mTc-3PRGD2 Spect-CT scan
Description: Before the operation，SPECT-CT imaging of lymph nodes was performed by integrin αvβ3-specific 99mTc-3PRGD2 probe. The locations of 99mTc-3PRGD2 SPECT-CT were determined by preoperative CT scan. During the operation, D2 lymph node dissection of gastric cancer was performed under the guidance of fluorescent laparoscopy。
Arm group label: Experimental arm

Summary: Surgical lymph node dissection is the key to advanced gastric cancer. In recent years, after the overall implementation of standard D2 dissection, lymph node dissection for gastric cancer began to explore the direction of D1+ again. Current clinical studies of gastric cancer lymph node dissection based on intraoperative fluorescence navigation show that non-tumor specific lymph node fluorescence navigation surgery can only increase the total number of lymph nodes detected and ensure the completion of the dissection but not the accuracy. The sensitivity and specificity of the tracer metastatic lymph nodes are 56.3% (410/728), respectively. Specificity 46.1% (2669/5785). Tumor specific tracing of positive lymph nodes is the key to achieve accurate lymph node dissection for gastric cancer. Although tumor specific tracers are developing rapidly and related clinical studies are gradually being carried out, there are few reports on specific clinical studies on lymph node metastasis, suggesting that lymph node tracing is still a difficult problem. Previous basic studies have suggested that integrins play an important molecular biological role in the process of tumor lymph node metastasis. In the early stage, 99mTc3PRGD2 SPECT-CT showed good lymph node imaging effect in lung cancer and breast cancer, and 99mTc-oncoFAPI PET-CT also showed good lymph node imaging effect in gastric cancer. Therefore, this study aims to explore the application prospect of 99mTc3PRGD2 and other probes in molecular imaging of gastric cancer metastatic lymph nodes and guidance of lymph node dissection and tracer, so as to accumulate preliminary clinical data for exploring corresponding fluorescent probes for intraoperative tracer of gastric cancer lymph nodes.

Criteria for eligibility:
Criteria:
Inclusion Criteria: 1. Gastric adenocarcinoma was confirmed by histological examination, and the clinical stage was cT2-4N+M0 locally advanced stage; 2. Age 18-75 years old; 3. No previous drug treatment, radiotherapy and other treatments; 4. ECOG 0~1 points, KPS>70 points; 5. The baseline blood routine and biochemical indexes of the subjects meet the following criteria: hemoglobin ≥90g/L; Absolute neutrophil count (ANC) ≥1.5×109/L; Platelet ≥100×109/L; ALT, AST≤2.5 times the normal upper limit; ALP≤2.5 times the normal upper limit; Serum total bilirubin <1.5 times the normal upper limit; Serum creatinine <1 times the normal upper limit; Serum albumin ≥30g/L; 6. Radical surgical resection (D2 lymph dissection) was performed in all patients. 7. Willing and able to comply with the plan during the study; 8. Provide written informed consent before entering the study screening, and the patient has understood that he or she can withdraw from the study at any time of the study with no loss. Exclusion Criteria: 1. Pregnant or nursing women; 2. Clinically serious (i.e., active) heart disease, such as symptomatic coronary heart disease, NYHA Class II or worse congestive heart failure, or severe arrhythmia requiring medical intervention (see Appendix 12), or a history of myocardial infarction within the last 12 months; 3. Moderate or severe renal impairment [creatinine clearance equal to or less than 50 ml/min (calculated from Cockroft and Gault equations)], or serum creatinine > the upper limit of normal (ULN); 4. Patients with impaired liver function, ALT or AST less than or equal to 3×ULN, total bilirubin less than or equal to 1.5 ×ULN, or with proven Gilbert syndrome at baseline (unbound hyperbilirubinemia), serum albumin greater than or equal to 3.0 g/dL; 5. History of iodine allergy (ICG contains iodine) or allergy to ICG; 6. History of hyperthyroidism; 7. Under the physiological function state of the general elderly, the drug should be administered with caution.

Gender: All

Minimum age: 18 Years

Maximum age: 75 Years

Healthy volunteers: No

Start date: June 6, 2024

Completion date: December 31, 2025

Lead sponsor:
Agency: Peking University Cancer Hospital & Institute
Agency class: Other

Source: Peking University Cancer Hospital & Institute

Record processing date: ClinicalTrials.gov processed this data on November 12, 2024

Source: ClinicalTrials.gov page: https://clinicaltrials.gov/ct2/show/NCT06435741