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Summary: Helicobacter-induced gastric cancer progresses very slowly, even in animal models, making it difficult to study. Here, we present a protocol to establish an accelerated murine model for Helicobacter-induced gastric cancer. We describe steps for infecting mice with Helicobacter felis, harvesting gastric tissue, assessing disease severity by histopathologic scoring, and performing gene expression studies with RT-qPCR and RNA sequencing. The accelerated model shows rapid progression of the disease, with gastric precancerous lesions developing within 6 months post-infection with Helicobacter.For complete details on the use and execution of this protocol, please refer to Bali et al.1 : Publisher’s note: Undertaking any experimental protocol requires adherence to local institutional guidelines for laboratory safety and ethics.