HPMCAS-Coated Alginate Microparticles Loaded with Ctx(Ile(21))-Ha as a Promising Antimicrobial Agent against Salmonella Enteritidis in a Chicken Infection Model

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Roque-Borda, Cesar Augusto ; Souza Saraiva, Mauro de Mesquita ; Monte, Daniel F. M. ; Rodrigues Alves, Lucas Bocchini ; de Almeida, Adriana Maria ; Ferreira, Taisa Santiago ; de Lima, Tulio Spina ; Pereira Benevides, Valdinete ; Cabrera, Julia Memrava ; Claire, Sunil ; Meneguin, Andreia Bagliotti ; Chorilli, Marlus ; Pavan, Fernando Rogerio ; Berchieri Junior, Angelo ; Vicente, Eduardo Festozo

• Tipo de documento: Artigo Científico
• Fonte: ACS INFECTIOUS DISEASES; v. 8, n. 3, p. 10-pg., 2022-03-11.

Resumo

Salmonella enterica subsp. enterica serovar Enteritidis (S. Enteritidis) in poultry is most often transmitted by the fecal-oral route, which can be attributed to high population density. Upon encountering the innate immune response in a host, the pathogen triggers a stress response and virulence factors to help it survive in the host. The aim of this study was to evaluate the effect of hypromellose acetate/succinate (HPMCAS)-coated alginate microparticles containing the Ctx(Ile(21))-Ha antimicrobial peptide (AMP) on both intestinal colonization and systemic infection of laying hens challenged with S. Enteritidis. The applied AMP microsystem reduced the bacterial load of S. Enteritidis in the liver, with a statistical significance between groups A (control, no Ctx(Ile(21))-Ha peptide) and B (2.5 mg of Ctx(Ile(21))-Ha/kg) at 2 days postinfection (dpi), potentially indicating the effectiveness of Ctx(Ile(21))-Ha in the first stage of infection by S. Enteritidis. In addition, the results showed a significant decrease in the S. Enteritidis counts in the spleen and cecal content at 5 dpi; remarkably, no S. Enteritidis counts were observed in livers at 5, 7, and 14 dpi, regardless of the Ctx(Ile(21))-Ha dosage (p-value <0.0001). Using the Chi-square test, the effect of AMP microparticles on S. Enteritidis fecal excretion was also evaluated, and a significantly lower bacterial excretion was observed over 21 days in groups B and C, in comparison with the untreated control (p-value <0.05). In summary, the use of HPMCAS-Ctx(Ile(21))-Ha peptide microcapsules in laying hens drastically reduced the systemic infection of S. Enteritidis, mainly in the liver, indicating a potential for application as a feed additive against this pathogen. (AU)

• Processo FAPESP: 20/13497-4 - Busca do mecanismo de ação e efeito terapêutico de novas classes de fármacos contra Mycobacterium tuberculosis
• Beneficiário: Fernando Rogério Pavan
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/25707-3 - Aplicação do peptídeo antimicrobiano Ctx(Ile21)-Ha e seus conjugados em diferentes formulações como aditivo nutricional em pintainhas de postura
• Beneficiário: Cesar Augusto Roque Borda
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 20/16573-3 - Estudos in vitro e in vivo de análogos do peptídeo antimicrobiano B1CTcu5 encapsulados em micropartículas colón-específicas frente ao Mycobacterium tuberculosis
• Beneficiário: Cesar Augusto Roque Borda
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/00446-7 - Aplicação de peptídeos antimicrobianos como novos aditivos na nutrição animal
• Beneficiário: Eduardo Festozo Vicente
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores