Tp40: a new potential prognostic and diagnostic marker for syphilis

In recent years, syphilis, as a chronic infectious disease, has once again attracted much attention. <i>Treponema pallidum</i> exhibits remarkable infectivity, concealment, and aggressiveness, posing considerable challenges to its prevention and control. The underlying pathogenic mechanisms remain elusive, and during the infection process, the roles of numerous proteins are still unclear. Through protein characterization in this study, it was found that the Tp40 protein is highly likely to be a transmembrane protein with a signal peptide and may be located in the periplasm. Besides, based on experiments with animal models and the detection of human serum samples, we believe that the Tp40 protein is a potential <i>in vivo</i>-induced antigen of <i>T. pallidum</i> that can be used for serological diagnosis of syphilis. This study conducted a preliminary exploration of the Tp40 protein and provided a meaningful reference for further exploration of the functional mechanism of the Tp40 protein and its significance in clinical diagnosis.