Subsequently, in an effort to investigate the expression of KLF5 in ovarian cancer and its correlation with patient prognosis, western blot and tissue immune microarray analysis was conducted on ovarian cancer tissues obtained from the Obstetrics and Gynecology Department of Qilu Hospital at Shandong University using immunohistochemical staining techniques (Fig. 2E and F). The gene discussed is KLF5; the disease is ovarian cancer.