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Objective: Angiogenin (ANG) is upregulated in a variety of cancers including those of prostate, cervix, pancreas, liver, oral cavity, skin, and etc., however, the role of ANG in gastric cancer has not been fully elucidated yet. We use Tissue Microarray (TMA) to examine ANG expression to investigate the role of ANG in the progression of gastric cancer. Method: Immunohistochemistry was used to evaluate ANG expression in TMA with 208 spots from 104 patients diagnosed with gastric cancer and the corresponding adjacent tissue. Results: In normal adjacent tissue, ANG was expressed mainly in cytoplasm at basal gland of the gastric mucus where gastric stem cells are reserved, and also sparsely expressed in the nucleus of gastric mucosal gland cells at isthmus where gastric stem cells are gathered. In cancer tissues, ANG was very sparsely expressed in the nucleus of gastric glandular cells. ANG expression in the cytoplasm was found to be significantly associated with pathological types (p < 0.001) and malignancy (p < 0.001). ANG expression in the nucleus was inversely correlated with malignancy (p = 0.019), differentiation status (p < 0.001), and tumor stage (p = 0.048). Conclusion: ANG might play an important role in gastric cancer development. Research Article ISSN: 2637-6954

Expression of Angiogenin is inversely correlated to Progression of Gastric Tumors