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Deconjugated Bile Salts Produced by Extracellular Bile-Salt Hydrolase-Like Activities from the Probiotic Lactobacillus johnsonii La1 Inhibit Giardia duodenalis In vitro Growth ArchiMer
Travers, Marie-agnes; Sow, Cisse; Zirah, Severine; Deregnaucourt, Christiane; Chaouch, Soraya; Queiroz, Rayner M. L.; Charneau, Sebastien; Allain, Thibault; Florent, Isabelle; Grellier, Philippe.
Giardiasis, currently considered a neglected disease, is caused by the intestinal protozoan parasite Giardia duodenalis and is widely spread in human as well as domestic and wild animals. The lack of appropriate medications and the spread of resistant parasite strains urgently call for the development of novel therapeutic strategies. Host microbiota or certain probiotic strains have the capacity to provide some protection against giardiasis. By combining biological and biochemical approaches, we have been able to decipher a molecular mechanism used by the probiotic strain Lactobacillus johnsonii La1 to prevent Giardia growth in vitro. We provide evidence that the supernatant of this strain contains active principle(s) not directly toxic to Giardia but able...
Tipo: Text Palavras-chave: Giardiasis; Lactobacilli; Probiotics; Microbiota; Bile salts; Anti-giardial activity; Choloylglycine bile acid hydrolase.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00351/46211/45906.pdf
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Effect of probiotics on giardiasis. Where are we? BJPS
Ventura,Luciana Laranjo Amorim; Oliveira,Dirce Ribeiro de; Gomes,Maria Aparecida; Torres,Marcia Regina Fantoni.
ABSTRACT Giardiasis, an intestinal infection caused by Giardia lamblia, was recently included in the ‘Neglected Diseases Initiative’ by the World Health Organization. Symptomatic patients can develop mild diarrhea up to a severe malabsorption syndrome, and children may show significantly impaired cognitive and physical development. Currently, nitroimidazoles are the main class of antibiotic used to treat giardiasis. Despite the efficacy of these drugs, adverse effects and reported resistance have increased, encouraging studies to identify and develop therapeutic alternatives. In this context, probiotics may represent an attractive option. Probiotics are defined as live microorganisms that, when administered in suitable amounts, confer a health benefit to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Giardia lamblia; Giardiasis; Probiotics/effects/evaluation.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000200401
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Hemolytic, anticancer and antigiardial activity of Palythoa caribaeorum venom J. Venom. Anim. Toxins incl. Trop. Dis.
Lazcano-Pérez,Fernando; Zavala-Moreno,Ariana; Rufino-González,Yadira; Ponce-Macotela,Martha; García-Arredondo,Alejandro; Cuevas-Cruz,Miguel; Gómez-Manzo,Saúl; Marcial-Quino,Jaime; Arreguín-Lozano,Barbarín; Arreguín-Espinosa,Roberto.
Abstract Background Cnidarian venoms and extracts have shown a broad variety of biological activities including cytotoxic, antibacterial and antitumoral effects. Most of these studied extracts were obtained from sea anemones or jellyfish. The present study aimed to determine the toxic activity and assess the antitumor and antiparasitic potential of Palythoa caribaeorum venom by evaluating its in vitro toxicity on several models including human tumor cell lines and against the parasite Giardia intestinalis. Methods The presence of cytolysins and vasoconstrictor activity of P. caribaeorum venom were determined by hemolysis, PLA2 and isolated rat aortic ring assays, respectively. The cytotoxic effect was tested on HCT-15 (human colorectal adenocarcinoma),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cnidarian; Palythoa caribaeorum; Cytotoxin; Antitumoral effect; Giardiasis.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100306
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High prevalence of giardiasis and strongyloidiasis among HIV-infected patients in Bahia, Brazil BJID
Feitosa,Giovana; Bandeira,Antônio C.; Sampaio,Diana P.; Badaró,Roberto; Brites,Carlos.
Diarrhea due to intestinal microbial infections is a frequent manifestation among HIV-infected patients. It has been postulated that HIV-infected patients may have special types of intestinal infections, and that immune activation from such parasites may affect the progression of HIV disease. To evaluate these associations, the frequency of infections was examined in HIV-infected patients in Bahia, Brazil. To determine the potential impact of the presence of intestinal parasitic infections on HIV disease progression, a retrospective study approach was used. The medical charts of 365 HIV-infected patients who had been treated at the AIDS Clinic of the Federal University of Bahia Hospital were reviewed, and the prevalence of parasites was compared with 5,243...
Tipo: Info:eu-repo/semantics/article Palavras-chave: HIV-infected patients; Strongyloidiasis; Giardiasis.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702001000600008
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The effects of nitric oxide on the immune response during giardiasis BJID
Pavanelli,Wander Rogério; Gutierrez,Fredy Roberto Salazar; Silva,Jean Jerley Nogueira da; Costa,Ivete Conchon; Menezes,Maria Claudia Noronha Dutra de; Oliveira,Francisco José de Abreu; Itano,Eiko Nakagawa; Watanabe,Maria Angélica Ehara.
Nitric oxide (NO) is a free radical synthesized from L-arginine by different isoforms NO-synthases. NO possesses multiple and complex biological functions. NO is an important mediator of homeostasis, and changes in its generation or actions can contribute or not to pathological states. The knowledge of effects of NO has been not only important to our understanding of immune response, but also to new tools for research and treatment of various diseases. Knowing the importance of NO as inflammatory mediator in diverse infectious diseases, we decided to develop a revision that shows the participation/effect of this mediator in immune response induced against Giardia spp. Several studies already demonstrated the participation of NO with microbicidal and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitric oxide; Immune system; Giardiasis.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000600010
Registros recuperados: 5
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