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Netto de Oliveira da Cunha C, Rodeghiero Collares S, Carvalho Rodrigues D, Walcher DL, Quintana de Moura M, Rodrigues Martins LH, Baracy Klafke G, de Oliveira Arias JL, Carapelli R, do Santos Espinelli Junior JB, Scaini CJ, Farias da Costa de Avila L. The larvicidal effect of the supernatant of Lactobacillus acidophilus ATCC 4356 on Toxocara canis. Exp Parasitol 2024; 258:108720. [PMID: 38367945 DOI: 10.1016/j.exppara.2024.108720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/19/2024]
Abstract
Human toxocariasis is a parasitic anthropozoonosis that is difficult to treat and control. A previous study carried out with Lactobacillus acidophilus ATCC 4356 revealed that the cell free supernatant (CFS) of this probiotic killed 100% of Toxocara canis larvae in vitro. The present study aimed to investigate the characteristics of the CFS of L. acidophilus ATCC 4356, which may be involved in its larvicidal effects on T. canis. L. acidophilus ATCC 4356 was cultured, and lactic and acetic acids present in the CFS were quantified by high performance liquid chromatography (HPLC). The levels of pH and H2O2 were also analyzed. To assess the larvicidal effect of the CFS, this was tested pure and diluted (1:2 to 1:128) on T. canis larvae. High concentrations of lactic and acetic acids were detected in the CFS. The acidity of the pure CFS was observed at pH 3.8, remaining acidic at dilutions of 1:2 to 1:16. Regarding the in vitro larvicidal effect, 100% death of T. canis larvae was observed using the pure CFS and 1:2 dilution. Based on these results, it can be inferred that the presence of higher concentrations of organic acids and low pH of the medium contributed to the larvicidal activity of the CFS of L. acidophilus ATCC 4356. In addition, the maintenance of the larvicidal effect, even after dilution, suggests a greater chance of the larvicidal effect of this CFS against T. canis in vivo.
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Affiliation(s)
- Carolina Netto de Oliveira da Cunha
- Faculty of Medicine (FAMED)/Parasitology Laboratory, Federal University of Rio Grande, General Osório, S/N, CEP 96200-190, Rio Grande, RS, Brazil.
| | | | - Débora Carvalho Rodrigues
- Faculty of Medicine (FAMED)/Parasitology Laboratory, Federal University of Rio Grande, General Osório, S/N, CEP 96200-190, Rio Grande, RS, Brazil
| | - Débora Liliane Walcher
- Faculty of Medicine (FAMED)/Parasitology Laboratory, Federal University of Rio Grande, General Osório, S/N, CEP 96200-190, Rio Grande, RS, Brazil
| | - Micaele Quintana de Moura
- Faculty of Medicine (FAMED)/Parasitology Laboratory, Federal University of Rio Grande, General Osório, S/N, CEP 96200-190, Rio Grande, RS, Brazil
| | - Lourdes Helena Rodrigues Martins
- Faculty of Medicine (FAMED)/Parasitology Laboratory, Federal University of Rio Grande, General Osório, S/N, CEP 96200-190, Rio Grande, RS, Brazil
| | - Gabriel Baracy Klafke
- Faculty of Medicine (FAMED)/Parasitology Laboratory, Federal University of Rio Grande, General Osório, S/N, CEP 96200-190, Rio Grande, RS, Brazil
| | - Jean Lucas de Oliveira Arias
- Integrated Analysis Center, School of Chemistry and Food, Federal University of Rio Grande, Av. Italia, Km 6 - Campus Carreiros, CEP 96203-900, Rio Grande, Rio Grande do Sul, Brazil
| | - Rodolfo Carapelli
- School of Chemistry and Food, Federal University of Rio Grande, Avenida Itália, Km 08 - Campus Carreiros, CEP 96.203-900, Rio Grande, Rio Grande do Sul, Brazil
| | - João Batista do Santos Espinelli Junior
- School of Chemistry and Food, Federal University of Rio Grande, Avenida Itália, Km 08 - Campus Carreiros, CEP 96.203-900, Rio Grande, Rio Grande do Sul, Brazil
| | - Carlos James Scaini
- Faculty of Medicine (FAMED)/Parasitology Laboratory, Federal University of Rio Grande, General Osório, S/N, CEP 96200-190, Rio Grande, RS, Brazil
| | - Luciana Farias da Costa de Avila
- Faculty of Medicine (FAMED)/Parasitology Laboratory, Federal University of Rio Grande, General Osório, S/N, CEP 96200-190, Rio Grande, RS, Brazil
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de Moura MQ, da Cunha CNDO, de Sousa NFGC, Cruz LAX, Rheingantz MG, Walcher DL, Mattos GT, Martins LHR, de Ávila LFDC, Berne MEA, Scaini CJ. Immunomodulation in the intestinal mucosa of mice supplemented with Lactobacillus rhamnosus (ATCC 7469) and infected with Toxocara canis. Immunobiology 2023; 228:152359. [PMID: 36857908 DOI: 10.1016/j.imbio.2023.152359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 01/31/2023] [Accepted: 02/21/2023] [Indexed: 03/02/2023]
Abstract
Toxocariasis is an anthropozoonosis caused by the helminth Toxocara canis that shows different clinical manifestations as visceral, ocular, or neurological toxocariasis forms. Probiotics have been studied as alternatives to prevent and treat this parasitosis. Lactobacillus rhamnosus is a prospect that presents immunomodulatory activity that acts to strengthen the intestinal barrier. In this context, the main objective of this study was to evaluate the protective capacity and immunomodulatory action of the probiotic Lactobacillus rhamnosus at the level of the intestinal mucosa in different stages of T. canis infection (acute and chronic). Mice were supplemented by oral gavage with 1 × 107 UFC/mL L. rhamnosus for 15 days before inoculation with 100 embryonated eggs of T. canis. Euthanasia of mice was conducted at three different time points: 2, 15 and 30 days post-inoculation (PI). The brain, lungs and liver were collected to evaluate the intensity of infection. The small intestines were removed, and mucosal cells of the duodenum were collected to perform gene analysis of IFN-γ, IL-10, IL-4 and IL-13 by real-time polymerase chain reaction (qPCR). Jejunum and ileum segments were analysed by histological techniques. A reduction of 51% in infection intensity was observed in the tissue of supplemented animals evaluated 2 days PI; however, analysis of groups 15 and 30 days PI did not show a protective effect. The intestinal mucosa of supplemented animals presented an inflammatory process that initiated at 2 days PI, persisted at 15 days PI and had regressed at 30 days PI. IL-13 transcription was increased in the probiotic group 2 days after supplementation ended; however, the same increase was not observed in the group that was supplemented and infected. Toxocara canis modulated the local immune system, with suppression of IFN-γ at 2 days PI and increased levels of IL-4 and IL-10 at 15 days PI. These results indicate that, under the studied conditions, the protective effect of Lactobacillus rhamnosus against infection caused by T. canis is not related to IL-4, IL-10 or IFN-γ but could be influenced by IL-13 action at 2 days PI. The probiotic stimulated immune cell recruitment to the intestinal mucosa, which can be involved in the diminished capacity of larval penetration in the mucosa, resulting in the reduced infection intensity observed during acute infection.
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Affiliation(s)
- Micaele Quintana de Moura
- Post-Graduate Program in Health Sciences - Parasitology Laboratory, Federal Univesity of Rio Grande (FURG), Rio Grande, Rio Grande do Sul, Brazil.
| | - Carolina Netto de Oliveira da Cunha
- Post-Graduate Program in Health Sciences - Parasitology Laboratory, Federal Univesity of Rio Grande (FURG), Rio Grande, Rio Grande do Sul, Brazil
| | | | - Luis Augusto Xavier Cruz
- Department of Morphology, Institute of Biology, Federal University of Pelotas (UFPel), Pelotas, Rio Grande do Sul, Brazil
| | - Maria Gabriela Rheingantz
- Department of Morphology, Institute of Biology, Federal University of Pelotas (UFPel), Pelotas, Rio Grande do Sul, Brazil
| | - Débora Liliane Walcher
- Post-Graduate Program in Microbiology and Parasitology, Department of Microbiology and Parasitology, Federal University of Pelotas (UFPel), Pelotas, Rio Grande do Sul, Brazil
| | - Gabriela Torres Mattos
- Post-Graduate Program in Health Sciences - Parasitology Laboratory, Federal Univesity of Rio Grande (FURG), Rio Grande, Rio Grande do Sul, Brazil
| | - Lourdes Helena Rodrigues Martins
- Post-Graduate Program in Health Sciences - Parasitology Laboratory, Federal Univesity of Rio Grande (FURG), Rio Grande, Rio Grande do Sul, Brazil
| | - Luciana Farias da Costa de Ávila
- Post-Graduate Program in Health Sciences - Parasitology Laboratory, Federal Univesity of Rio Grande (FURG), Rio Grande, Rio Grande do Sul, Brazil
| | - Maria Elisabeth Aires Berne
- Post-Graduate Program in Microbiology and Parasitology, Department of Microbiology and Parasitology, Federal University of Pelotas (UFPel), Pelotas, Rio Grande do Sul, Brazil
| | - Carlos James Scaini
- Post-Graduate Program in Health Sciences - Parasitology Laboratory, Federal Univesity of Rio Grande (FURG), Rio Grande, Rio Grande do Sul, Brazil
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Cuinat C, Stinson SE, Ward WE, Comelli EM. Maternal Intake of Probiotics to Program Offspring Health. Curr Nutr Rep 2022; 11:537-562. [PMID: 35986890 PMCID: PMC9750916 DOI: 10.1007/s13668-022-00429-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/08/2022] [Indexed: 01/31/2023]
Abstract
PURPOSE OF REVIEW Probiotics intake may be considered beneficial by prospective and pregnant mothers, but their effects on offspring development are incompletely understood. The purpose of this review was to examine recent pre-clinical and clinical studies to understand how maternal probiotics exposure affects offspring health outcomes. RECENT FINDINGS Effects were investigated in the context of supporting offspring growth, intestinal health, and gut microbiota, preventing allergic diseases, supporting neurodevelopment, and preventing metabolic disorders in pre-clinical and clinical studies. Most human studies focused on infancy outcomes, whereas pre-clinical studies also examined outcomes at adolescence and young adulthood. While still understudied, both pre-clinical and clinical studies propose epigenetic modifications as an underlying mechanism. Optimal timing of intervention remains unclear. Administration of selected probiotics to mothers has programming potential for sustaining life-long health of offspring. Administration protocols, specific windows of susceptibility, and individual-specific responses need to be further studied.
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Affiliation(s)
- Céline Cuinat
- grid.17063.330000 0001 2157 2938Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON Canada
| | - Sara E. Stinson
- grid.17063.330000 0001 2157 2938Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON Canada
| | - Wendy E. Ward
- grid.17063.330000 0001 2157 2938Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON Canada ,grid.411793.90000 0004 1936 9318Department of Kinesiology, Faculty of Applied Health Sciences, Brock University, St. Catharines, ON Canada
| | - Elena M. Comelli
- grid.17063.330000 0001 2157 2938Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON Canada ,grid.411793.90000 0004 1936 9318Department of Kinesiology, Faculty of Applied Health Sciences, Brock University, St. Catharines, ON Canada ,grid.17063.330000 0001 2157 2938Joannah and Brian Lawson Centre for Child Nutrition, Faculty of Medicine, University of Toronto, Toronto, ON Canada
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