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Saz-Leal P, Ligon MM, Diez-Rivero CM, García-Ayuso D, Mohanty S, Viñuela M, Real-Arévalo I, Conejero L, Brauner A, Subiza JL, Mysorekar IU. MV140 Mucosal Vaccine Induces Targeted Immune Response for Enhanced Clearance of Uropathogenic E. coli in Experimental Urinary Tract Infection. Vaccines (Basel) 2024; 12:535. [PMID: 38793786 PMCID: PMC11126127 DOI: 10.3390/vaccines12050535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/07/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024] Open
Abstract
MV140 is an inactivated whole-cell bacterial mucosal vaccine with proven clinical efficacy against recurrent urinary tract infections (UTIs). These infections are primarily caused by uropathogenic E. coli (UPEC) strains, which are unique in their virulence factors and remarkably diverse. MV140 contains a non-UPEC strain, suggesting that it may induce an immune response against different UPEC-induced UTIs in patients. To verify this, we experimentally evaluated the cellular and humoral responses to UTI89, a prototypical UPEC strain, in mice vaccinated with MV140, as well as the degree of protection achieved in a UPEC UTI89 model of acute cystitis. The results show that both cellular (Th1/Th17) and antibody (IgG/IgA) responses to UTI89 were induced in MV140-immunized mice. MV140 vaccination resulted in an early increased clearance of UTI89 viable bacteria in the bladder and urine following transurethral infection. This was accompanied by a highly significant increase in CD4+ T cells in the bladder and an increase in urinary neutrophils. Collectively, our results support that MV140 induces cross-reactive humoral and cellular immune responses and cross-protection against UPEC strains.
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Affiliation(s)
- Paula Saz-Leal
- Inmunotek S.L., 28805 Madrid, Spain; (C.M.D.-R.); (D.G.-A.); (M.V.); (I.R.-A.); (L.C.); (J.L.S.)
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO 63110, USA; (M.M.L.); (I.U.M.)
| | - Marianne Morris Ligon
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO 63110, USA; (M.M.L.); (I.U.M.)
| | - Carmen María Diez-Rivero
- Inmunotek S.L., 28805 Madrid, Spain; (C.M.D.-R.); (D.G.-A.); (M.V.); (I.R.-A.); (L.C.); (J.L.S.)
| | - Diego García-Ayuso
- Inmunotek S.L., 28805 Madrid, Spain; (C.M.D.-R.); (D.G.-A.); (M.V.); (I.R.-A.); (L.C.); (J.L.S.)
| | - Soumitra Mohanty
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 17177 Stockholm, Sweden; (S.M.); (A.B.)
- Division of Clinical Microbiology, Karolinska University Hospital, 17176 Stockholm, Sweden
| | - Marcos Viñuela
- Inmunotek S.L., 28805 Madrid, Spain; (C.M.D.-R.); (D.G.-A.); (M.V.); (I.R.-A.); (L.C.); (J.L.S.)
| | - Irene Real-Arévalo
- Inmunotek S.L., 28805 Madrid, Spain; (C.M.D.-R.); (D.G.-A.); (M.V.); (I.R.-A.); (L.C.); (J.L.S.)
| | - Laura Conejero
- Inmunotek S.L., 28805 Madrid, Spain; (C.M.D.-R.); (D.G.-A.); (M.V.); (I.R.-A.); (L.C.); (J.L.S.)
| | - Annelie Brauner
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 17177 Stockholm, Sweden; (S.M.); (A.B.)
- Division of Clinical Microbiology, Karolinska University Hospital, 17176 Stockholm, Sweden
| | - José Luis Subiza
- Inmunotek S.L., 28805 Madrid, Spain; (C.M.D.-R.); (D.G.-A.); (M.V.); (I.R.-A.); (L.C.); (J.L.S.)
| | - Indira Uppugunduri Mysorekar
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO 63110, USA; (M.M.L.); (I.U.M.)
- Department of Medicine, Section of Infectious Diseases, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
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Andretta M, Tavares RDM, Fusieger A, Yamatogi RS, Nero LA. Agreement of methods to assess antimicrobial susceptibility using Escherichia coli isolates as target models. Lett Appl Microbiol 2024; 77:ovae009. [PMID: 38285611 DOI: 10.1093/lambio/ovae009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 12/08/2023] [Accepted: 01/25/2024] [Indexed: 01/31/2024]
Abstract
Antimicrobial susceptibility tests (AST) conducted in vitro offer a range of methods to assess the antimicrobial resistance (AMR) of microorganisms. Escherichia coli, a widely distributed bacterium, is closely linked to the issue of AMR. In this way, the present study aimed to assess the agreement among different in vitro AST methods, including disk diffusion in agar, broth dilution, and agar dilution method. A total of 100 E. coli isolates were analyzed for their resistance levels against six antibiotics: amoxicillin, ceftiofur, ciprofloxacin, chloramphenicol, tetracycline, and sulfamethoxazole + trimethoprim, using the aforementioned AST methods. Standard breakpoint values were employed to classify isolates as resistant, intermediate, or susceptible, and comparisons among the AST methods were conducted by McNemar's test (P < .05). The obtained data demonstrated equivalence among the AST methods, highlighting the reliability of these standardized classical methodologies. This standardization aids in preventing the inappropriate use of antimicrobials and the dissemination of antimicrobial-resistant microorganisms.
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Affiliation(s)
- Milimani Andretta
- InsPOA-Laboratório de Inspeção de Produtos de Origem Animal, Departamento de Veterinária, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
| | - Rafaela de Melo Tavares
- InsPOA-Laboratório de Inspeção de Produtos de Origem Animal, Departamento de Veterinária, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
| | - Andressa Fusieger
- InovaLeite-Laboratório de Pesquisa em Leites e Derivados, Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
| | - Ricardo Seiti Yamatogi
- InsPOA-Laboratório de Inspeção de Produtos de Origem Animal, Departamento de Veterinária, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
| | - Luís Augusto Nero
- InsPOA-Laboratório de Inspeção de Produtos de Origem Animal, Departamento de Veterinária, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
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