Hepatic Artery Transfusion of NKG2D CAR-NK Cells Followed by Intravenous Infusion of NKG2D CAR-T Cells to Treat Patients With Advanced Solid Tumors With Liver Metastases Who Have Failed Standard Treatments: a Phase I Exploratory Clinical Trial

This is a single-center, single-arm, open-label, dose-escalation clinical study to evaluate the safety and preliminary efficacy of NKG2D CAR-NK cells followed by NKG2D CAR-T cells in patients with advanced solid tumors (e.g.,colorectal cancer) with liver metastases who have failed standard treatments. The study primarily focuses on determining the maximum tolerated dose and recommended phase II dose through sequential cohort dose escalation, while secondarily characterizing the pharmacokinetic parameters and collecting initial efficacy data regarding tumor response. This investigation comprehensively evaluates the pharmacodynamic and pharmacokinetic profile of NKG2D CAR cellular therapy through three primary objectives: (1) systematic monitoring of treatment-emergent adverse events and clinically significant laboratory parameter deviations; (2) assessment of antitumor activity with correlative biomarker analysis; and (3) characterization of cellular kinetics including biodistribution patterns, and mechanistic pathways of therapeutic activity. The protocol clarifies cellular persistence and functional regulation within the tumor microenvironment by longitudinal monitoring of cytokine release and using advanced molecular tracking methods.