Furthermore, in the gastric mucosa of the patients with H. pylori-infected gastritis, USP15, ZNF451, TGFB1, and CCNT were identified as participants in the TGF-β signaling pathway, while FYB, HLA-DRB1, ANKRD24, and TMEM35 were implicated in T lymphocyte differentiation and immune response processes (Table 2). The gene discussed is HLA-DRB1; the disease is gastritis.