Ralf Schulein

Learn More
The modulation of host cell apoptosis by bacterial pathogens is of critical importance for the outcome of the infection process. The capacity of Bartonella henselae and B. quintana to cause vascular tumor formation in immunocompromised patients is linked to the inhibition of vascular endothelial cell (EC) apoptosis. Here, we show that translocation of BepA,(More)
Bacterial type IV secretion (T4S) systems mediate the transfer of macromolecular substrates into various target cells, e.g., the conjugative transfer of DNA into bacteria or the transfer of virulence proteins into eukaryotic host cells. The T4S apparatus VirB of the vascular tumor-inducing pathogen Bartonella henselae causes subversion of human endothelial(More)
Bartonellae are pathogenic bacteria uniquely adapted to cause intraerythrocytic infection in their human or animal reservoir host(s). Experimental infection of rats by Bartonella tribocorum revealed the initial colonization of a yet unidentified niche outside of circulating blood. This primary niche periodically seeds bacteria into the bloodstream,(More)
Bartonella henselae is an arthropod-borne zoonotic pathogen causing intraerythrocytic bacteraemia in the feline reservoir host and a broad range of clinical manifestations in incidentally infected humans. Remarkably, B. henselae can specifically colonize the human vascular endothelium, resulting in inflammation and the formation of vasoproliferative lesions(More)
The genus Bartonella comprises human-specific and zoonotic pathogens responsible for a wide range of clinical manifestations, including Carrion's disease, trench fever, cat scratch disease, bacillary angiomatosis and peliosis, endocarditis and bacteremia. These arthropod-borne pathogens typically parasitise erythrocytes in their mammalian reservoir host(s),(More)
The extracellular N terminus of the endothelin B (ET(B)) receptor is susceptible to limited proteolysis (cleavage at R64 downward arrow S65), but the regulation and the functional consequences of the proteolysis remain elusive. We analyzed the ET(B) receptor or an ET(B)-GFP fusion protein stably or transiently expressed in HEK293 cells. After incubation of(More)
We report herein the isolation and molecular characterization of pBGR1, the first native plasmid isolated from the genus Bartonella. Cloning and sequencing revealed a 2725-base pair (bp) cryptic plasmid comprising two open reading frames of considerable length, which were designated rep and mob. The regions containing rep and mob are separated by 140-bp(More)
  • 1