TFRC and gastric cancer: In the laboratory research and development processes, Du et al. used dye-labelled human heavy chain ferritin as an endoscopic imaging nanoprobe to identify the GC biomarker transferrin receptor 1, leading to specific early imaging of GC by using confocal laser microendoscopy, which is helpful in distinguishing between tumour and nontumor tissue and in visualizing endoscopic resections and tumour margin differentiations [66].