title: Development of an intranasal vaccine to prevent urinary tract infection by Proteus mirabilis.
abstract: Proteus mirabilis commonly infects the complicated urinary tract and is associated with urolithiasis. Stone formation is caused by bacterial urease, which hydrolyzes urea to ammonia, causing local pH to rise, and leads to the subsequent precipitation of magnesium ammonium phosphate (struvite) and calcium phosphate (apatite) crystals. To prevent these infections, we vaccinated CBA mice with formalin-killed bacteria or purified mannose-resistant, Proteus-like (MR/P) fimbriae, a surface antigen expressed by P. mirabilis during experimental urinary tract infection, via four routes of immunization: subcutaneous, intranasal, transurethral, and oral. We assessed the efficacy of vaccination using the CBA mouse model of ascending urinary tract infection. Subcutaneous or intranasal immunization with formalin-killed bacteria and intranasal or transurethral immunization with purified MR/P fimbriae significantly protected CBA mice from ascending urinary tract infection by P. mirabilis (P < 0.05). To investigate the potential of MrpH, the MR/P fimbrial tip adhesin, as a vaccine, the mature MrpH peptide (residues 23 to 275, excluding the signal peptide), and the N-terminal receptor-binding domain of MrpH (residues 23 to 157) were overexpressed as C-terminal fusions to maltose-binding protein (MBP) and purified on amylose resins. Intranasal immunization of CBA mice with MBP-MrpH (residues 23 to 157) conferred effective protection against urinary tract infection by P. mirabilis (P < 0.002).
authors.affiliation: Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: C Virginia
authors.initials: CV
authors.lastname: Lockatell
authors.forename: David E
authors.initials: DE
authors.lastname: Johnson
authors.forename: M Chelsea
authors.initials: MC
authors.lastname: Lane
authors.forename: John W
authors.initials: JW
authors.lastname: Warren
authors.forename: Harry L T
authors.initials: HL
authors.lastname: Mobley
mesh_terms: D018829:Adhesins, Bacterial / Q000235:genetics / Q000276:immunology; D000281:Administration, Intranasal; D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood; D001428:Bacterial Vaccines / Q000008:administration & dosage* / Q000276:immunology; D036781:Fimbriae Proteins / Q000235:genetics / Q000276:immunology; D005557:Formaldehyde / Q000494:pharmacology; D007114:Immunization; D051379:Mice; D008808:Mice, Inbred CBA; D011512:Proteus Infections / Q000382:microbiology / Q000517:prevention & control*; D011513:Proteus mirabilis / Q000254:growth & development / Q000276:immunology*; D014552:Urinary Tract Infections / Q000382:microbiology / Q000517:prevention & control*; D019444:Vaccines, DNA / Q000008:administration & dosage / Q000276:immunology; D015164:Vaccines, Inactivated / Q000008:administration & dosage / Q000276:immunology
chemical_list: D018829:Adhesins, Bacterial; D000907:Antibodies, Bacterial; D001428:Bacterial Vaccines; C119575:MrpH protein, Proteus mirabilis; D019444:Vaccines, DNA; D015164:Vaccines, Inactivated; D036781:Fimbriae Proteins; D005557:Formaldehyde