1
|
Loreto ES, Tondolo JSM, Zanette RA. Treating Pythiosis with Antibacterial Drugs Targeting Protein Synthesis: An Overview. J Fungi (Basel) 2024; 10:234. [PMID: 38667905 PMCID: PMC11051233 DOI: 10.3390/jof10040234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/08/2024] [Accepted: 03/18/2024] [Indexed: 04/28/2024] Open
Abstract
This review article explores the effectiveness of antibacterial drugs that inhibit protein synthesis in treating pythiosis, a difficult-to-treat infection caused by Pythium insidiosum. The article highlights the susceptibility of P. insidiosum to antibacterial drugs, such as macrolides, oxazolidinones, and tetracyclines. We examine various studies, including in vitro tests, experimental infection models, and clinical case reports. Based on our synthesis of these findings, we highlight the potential of these drugs in managing pythiosis, primarily when combined with surgical interventions. The review emphasizes the need for personalized treatment strategies and further research to establish standardized testing protocols and optimize therapeutic approaches.
Collapse
Affiliation(s)
- Erico S. Loreto
- Sobresp Faculty of Health Sciences, 520 Appel Street, Santa Maria 97015-030, RS, Brazil;
| | - Juliana S. M. Tondolo
- Sobresp Faculty of Health Sciences, 520 Appel Street, Santa Maria 97015-030, RS, Brazil;
| | - Régis A. Zanette
- Department of Pharmacology, Basic Health Sciences Institute, Federal University of Rio Grande do Sul, 2600 Ramiro Barcelos Street, Porto Alegre 90035-003, RS, Brazil;
| |
Collapse
|
2
|
Dos Santos CEP, Loreto ES, Zanette RA, Santurio JM, Marques LC. Epidemiology of horse pythiosis in the Pantanal of Mato Grosso: Exploring the host-parasite-vector relationship. J Equine Vet Sci 2024; 132:104976. [PMID: 38056727 DOI: 10.1016/j.jevs.2023.104976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 11/20/2023] [Accepted: 11/29/2023] [Indexed: 12/08/2023]
Abstract
Horse pythiosis is considered an endemic disease in the Brazilian Pantanal region, causing devastating health and economic losses. This study aimed to enhance the understanding of pythiosis epidemiology, map the distribution of horse body lesions, and investigate the correlation between these lesions and warm body surface areas, potentially implicating hematophagous vectors in the disease's transmission. A prospective study was conducted on equids in the Pantanal Mato-grossense and adjacent areas from 2012 to 2022, with 112 horses and three mules diagnosed with pythiosis. Clinical and epidemiological data, lesions' photographic records, and healthy equids' thermal imaging were collected. Most pythiosis cases occurred between January and March, correlating with regional flood cycles. Most lesions were found on limbs and the ventral abdomen, with dark-colored horses exhibiting a higher frequency of lesions. Interestingly, the thermal mapping revealed that warm areas on a healthy horse's body overlapped significantly with lesion distribution - blood-sucking insects also prefer these areas. The results suggest that pythiosis lesions in horses correlate with warmer areas of the animal body, reinforcing the hypothesis of vector involvement in disease transmission. This study underscores the need for further observational research to fully understand the complex epidemiological dynamics of pythiosis in horses.
Collapse
Affiliation(s)
- Carlos E P Dos Santos
- Faculty of Veterinary Medicine, Federal University of Mato Grosso, Cuiabá, MT, 78069-900, Brazil; Department of Clinical and Veterinary Surgery, São Paulo State University, Jaboticabal, São Paulo, 14884-900, Brazil
| | - Erico S Loreto
- Sobresp Faculty of Health Sciences, Santa Maria, 97015-030, Brazil
| | - Régis A Zanette
- Department of Pharmacology, Basic Health Sciences Institute, Federal University of Rio Grande do Sul, 2600 Ramiro Barcelos Street, Porto Alegre, RS, 90035-003, Brazil.
| | - Janio M Santurio
- Department of Microbiology and Parasitology, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Luis C Marques
- Department of Clinical and Veterinary Surgery, São Paulo State University, Jaboticabal, São Paulo, 14884-900, Brazil
| |
Collapse
|
3
|
Pippi B, Loreto ES, Merkel S, Joaquim AR, Krummenauer ME, Reginatto P, Vainstein MH, Andrade SF, Fuentefria AM, Santurio JM, Zanette RA. Pythium insidiosum: insights into biofilm formation and antibiofilm activity of antifungal drugs. Braz J Microbiol 2023; 54:2603-2607. [PMID: 37702922 PMCID: PMC10689302 DOI: 10.1007/s42770-023-01123-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 09/05/2023] [Indexed: 09/14/2023] Open
Abstract
In this study, we investigate the ability of Pythium insidiosum to form biofilms across various substrates and the antibiofilm efficacy of 8-hydroxyquinoline derivatives (8-HQs). Biofilms of P. insidiosum were cultured on polystyrene plates, contact lenses, and horsehair. We provide the first evidence of P. insidiosum's biofilm-forming capability, thus considerably expanding our understanding of its transmission and pathogenesis. Our results demonstrate that 8-HQs effectively inhibit biofilm formation and eradicate pre-existing biofilms, underscoring their potential as a novel treatment strategy for pythiosis, a disease currently lacking a gold-standard treatment. This finding has particular relevance for ocular pythiosis associated with contact lens usage and potential infection sources in animals. Our results contribute to the scientific knowledge base and directly impact innovative therapeutic interventions' development.
Collapse
Affiliation(s)
- B Pippi
- Graduation Program in Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - E S Loreto
- Sobresp Faculty of Health Sciences, Santa Maria, RS, Brazil
| | - S Merkel
- Graduation Program in Biological Sciences: Pharmacology and Therapeutics, Department of Pharmacology, Basic Health Sciences Institute, Federal University of Rio Grande Do Sul, 2600 Ramiro Barcelos Street, Porto Alegre, RS, 90035-003, Brazil
| | - A R Joaquim
- Graduation Program in Pharmaceutical Sciences, Federal University of Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - M E Krummenauer
- Biotechnology Center, Federal University of Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - P Reginatto
- Graduation Program in Pharmaceutical Sciences, Federal University of Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - M H Vainstein
- Biotechnology Center, Federal University of Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - S F Andrade
- Graduation Program in Pharmaceutical Sciences, Federal University of Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - A M Fuentefria
- Graduation Program in Biological Sciences: Pharmacology and Therapeutics, Department of Pharmacology, Basic Health Sciences Institute, Federal University of Rio Grande Do Sul, 2600 Ramiro Barcelos Street, Porto Alegre, RS, 90035-003, Brazil
- Graduation Program in Pharmaceutical Sciences, Federal University of Rio Grande Do Sul, Porto Alegre, RS, Brazil
| | - J M Santurio
- Graduation Program in Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - R A Zanette
- Graduation Program in Biological Sciences: Pharmacology and Therapeutics, Department of Pharmacology, Basic Health Sciences Institute, Federal University of Rio Grande Do Sul, 2600 Ramiro Barcelos Street, Porto Alegre, RS, 90035-003, Brazil.
| |
Collapse
|
4
|
da Costa B, Pippi B, Merkel S, Agostinetto G, Zanette RA, Fuentefria AM. Drosophila melanogaster as a model of systemic dermatophytosis. Mycoses 2023; 66:906-910. [PMID: 37434424 DOI: 10.1111/myc.13630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/15/2023] [Accepted: 06/29/2023] [Indexed: 07/13/2023]
Abstract
BACKGROUND Dermatophytosis is one of the most common fungal infections worldwide. The distribution of dermatophytes varies across continents, but the genera Trichophyton and Microsporum have emerged as the main isolated agents in humans and animals. OBJECTIVES To validate Drosophila melanogaster flies as a fast and feasible model to study dermatophytic infections. METHODS Wild-type (WT) and Toll-deficient D. melanogaster flies were infected by Trichophyton rubrum, T. mentagrophytes, Microsporum canis and Nannizzia gypsea by pricking with a needle previously dipped in inoculum concentrations ranging from 103 to 108 colony-forming units/mL. Establishment of infection was confirmed by survival curves, histopathological analysis and fungal burden. Thereafter, flies were treated with terbinafine, itraconazole and clioquinol. RESULTS WT flies were predominantly resistant to the infection, whereas Toll-deficient flies succumbed to the four dermatophyte genera tested. The antifungal drugs protected flies from the infection, except for N. gypsea whose survival curves did not differ from the untreated group. CONCLUSIONS This pilot study confirms that D. melanogaster is a suitable model to study the virulence and antifungal drug efficacy in dermatophyte species.
Collapse
Affiliation(s)
- Bárbara da Costa
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Laboratório de Pesquisa em Micologia Aplicada, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Bruna Pippi
- Laboratório de Pesquisa em Micologia Aplicada, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Simone Merkel
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Giovanna Agostinetto
- Laboratório de Pesquisa em Micologia Aplicada, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Régis A Zanette
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Alexandre M Fuentefria
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Laboratório de Pesquisa em Micologia Aplicada, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| |
Collapse
|
5
|
Pippi B, Zanette RA, Joaquim AR, Krummenauer ME, Merkel S, Reginatto P, Vainstein MH, Andrade SF, Fuentefria AM, Tondolo JSM, Loreto ÉS, Santurio JM. Clioquinol and 8-hydroxyquinoline-5-sulfonamide derivatives damage the cell wall of Pythium insidiosum. J Appl Microbiol 2022; 134:lxac038. [PMID: 36626785 DOI: 10.1093/jambio/lxac038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/16/2022] [Accepted: 11/02/2022] [Indexed: 01/12/2023]
Abstract
AIMS To evaluate the antimicrobial activity and to determine the pharmacodynamic characteristics of three 8-hydroxyquinoline derivatives (8-HQs) against Pythium insidiosum, the causative agent of pythiosis. METHODS AND RESULTS Antimicrobial activity was tested by broth microdilution and MTT assays. The antimicrobial mode of action was investigated using sorbitol protection assay, ergosterol binding assay, and scanning electron microscopy. Clioquinol, PH151, and PH153 were active against all isolates, with MIC values ranging from 0.25 to 2 µg ml-1. They also showed a time- and dose-dependent antimicrobial effect, damaging the P. insidiosum cell wall. CONCLUSIONS Together, these results reinforce the potential of 8-HQs for developing new drugs to treat pythiosis.
Collapse
Affiliation(s)
- Bruna Pippi
- Graduation Program in Pharmacology, Federal University of Santa Maria, Santa Maria 97105-900, RS, Brazil
| | - Régis A Zanette
- Graduation Program in Biological Sciences: Pharmacology and Therapeutics, Federal University of Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Angélica R Joaquim
- Graduation Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Porto Alegre, 90010-150, RS, Brazil
| | - Maria E Krummenauer
- Biotechnology Center, Federal University of Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Simone Merkel
- Graduation Program in Biological Sciences: Pharmacology and Therapeutics, Federal University of Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Paula Reginatto
- Graduation Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Porto Alegre, 90010-150, RS, Brazil
| | - Marilene H Vainstein
- Biotechnology Center, Federal University of Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Saulo F Andrade
- Graduation Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Porto Alegre, 90010-150, RS, Brazil
- Graduation Program in Agricultural and Environmental Microbiology, Federal University of Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Alexandre M Fuentefria
- Graduation Program in Pharmaceutical Sciences, Federal University of Rio Grande do Sul, Porto Alegre, 90010-150, RS, Brazil
- Graduation Program in Agricultural and Environmental Microbiology, Federal University of Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Juliana S M Tondolo
- Graduation Program in Pharmacology, Federal University of Santa Maria, Santa Maria 97105-900, RS, Brazil
| | - Érico S Loreto
- Graduation Program in Pharmacology, Federal University of Santa Maria, Santa Maria 97105-900, RS, Brazil
| | - Janio M Santurio
- Graduation Program in Pharmacology, Federal University of Santa Maria, Santa Maria 97105-900, RS, Brazil
| |
Collapse
|
6
|
Ehrhardt A, Mandelli JZA, Bérgamo V, Lopes W, Donato RK, Zanette RA, Fuentefria AM. Glass ionomer cement modified by a imidazolium salt: adding antifungal properties to a biomaterial. Braz J Microbiol 2021; 52:1347-1352. [PMID: 33954929 DOI: 10.1007/s42770-021-00511-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 04/27/2021] [Indexed: 10/21/2022] Open
Abstract
We present the structural modification of a commercially available glass ionomer cement by inserting the imidazolium salt 1-n-hexadecyl-3-methylimidazolium chloride (C16MImCl), composing a new biomaterial with antifungal biofilm activity. Test specimens were prepared using a commercial glass ionomer cement to which 10 ppm of cetylpyridinium chloride (reference ionic antifungal agent) or C16MImCl were added. The feasibility and hypoallergenicity of the new biomaterial were assessed by microhardness plastic deformation and chorioallantoic membrane assays. Colony counting and scanning electron microscopy were used to evaluate the modified specimens' antibiofilm activity against three multidrug-resistant Candida species. The modified glass ionomer cement presented a strong antibiofilm activity against Candida spp., without losing its original micromechanical and hypoallergenic properties, rendering it a promising candidate for further application in dentistry.
Collapse
Affiliation(s)
- Alexandre Ehrhardt
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, Universidade Federal Do Rio Grande Do Sul (UFRGS), Porto Alegre, RS, 90050-170, Brazil. .,Laboratory of Biomedical Science, Universidade Luterana Do Brasil (ULBRA), Br 285, km 335, Carazinho, RS, 99500-000, Brazil.
| | | | - Vanessa Bérgamo
- Laboratory of Applied Mycology, UFRGS, Porto Alegre, RS, 90610-000, Brazil
| | - William Lopes
- Biotechnology Center, UFRGS, Porto Alegre, RS, 91501-970, Brazil
| | - Ricardo Keitel Donato
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Régis A Zanette
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, Universidade Federal Do Rio Grande Do Sul (UFRGS), Porto Alegre, RS, 90050-170, Brazil
| | - Alexandre Meneghello Fuentefria
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, Universidade Federal Do Rio Grande Do Sul (UFRGS), Porto Alegre, RS, 90050-170, Brazil.,Laboratory of Applied Mycology, UFRGS, Porto Alegre, RS, 90610-000, Brazil
| |
Collapse
|
7
|
da Silva Hellwig AH, Pagani DM, Rios IDS, Ribeiro AC, Zanette RA, Scroferneker ML. Influence of iron on growth and on susceptibility to itraconazole in Sporothrix spp. Med Mycol 2020; 59:400-403. [PMID: 33305309 DOI: 10.1093/mmy/myaa099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/23/2020] [Accepted: 11/23/2020] [Indexed: 11/13/2022] Open
Abstract
We evaluated the growth and the susceptibility to oxidative stress of Sporothrix spp., exposed to different iron concentrations in culture medium, and the susceptibility of Sporothrix spp. to itraconazole, alone and in combination with to the iron chelator deferasirox. The results showed that the growth of S. brasiliensis isolates was more affected by iron availability in comparison to S. schenckii, but both fungal species conidia became more prone to oxidative stress when iron was added to culture medium. Conversely, the combination of itraconazole and deferasirox only resulted in synergism against a minority of S. schenckii isolates.
Collapse
Affiliation(s)
| | - Danielle Machado Pagani
- Postgraduate Program in Agricultural and Environmental Microbiology, UFRGS, Rio Grande do Sul, Brazil
| | - Iasmin da Silva Rios
- Department of Microbiology, Immunology and Parasitology, ICBS, UFRGS, Rio Grande do Sul, Brazil
| | - Amanda Carvalho Ribeiro
- Department of Microbiology, Immunology and Parasitology, ICBS, UFRGS, Rio Grande do Sul, Brazil
| | - Régis A Zanette
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, UFRGS, Rio Grande do Sul, Brazil
| | - Maria Lúcia Scroferneker
- Postgraduate Program in Medicine: Medical Sciences, Universidade Federal do Rio Grande do Sul (UFRGS), Rio Grande do Sul, Brazil.,Department of Microbiology, Immunology and Parasitology, ICBS, UFRGS, Rio Grande do Sul, Brazil
| |
Collapse
|
8
|
Pippi B, Joaquim AR, Merkel S, Zanette RA, Nunes MEM, da Costa Silva DG, Schimith LE, Teixeira ML, Franco JL, Fernandes de Andrade S, Fuentefria AM. Antifungal activity and toxicological parameters of 8-hydroxyquinoline-5-sulfonamides using alternative animal models. J Appl Microbiol 2020; 130:1925-1934. [PMID: 33128257 DOI: 10.1111/jam.14915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 10/14/2020] [Accepted: 10/26/2020] [Indexed: 11/29/2022]
Abstract
AIM The purpose of this study was to evaluate the antifungal activity and toxicological parameters of 8-hydroxyquinoline derivatives PH151 and PH153 using alternative animal models, to understand their behaviour when subjected to in vivo experiments. METHODS AND RESULTS We used Toll-deficient Drosophila melanogaster to test the protective effect of compounds against Candida albicans infection. Toxicological parameters were investigated in chicken and zebrafish embryos. PH151 and PH153 showed low toxicity and the treated flies with these compounds had a significantly higher survival rate than untreated flies after 7 days of infection. The compounds did not cause interruption of chicken embryogenesis. Zebrafish embryos exposed to compounds showed dose-dependent toxicity. CONCLUSIONS The data supported the potential of PH151 and PH153 for the treatment of systemic candidiasis and demonstrated to be appropriate drug candidates for further studies using mammalian models. SIGNIFICANCE AND IMPACT OF THE STUDY The increased incidence of Candida infections resistant to antifungals currently available requires acceleration of the discovery of new agents with properties of inhibiting this fungal pathogen. In this study, we have described the antifungal potential and toxicity of two 8-hydroxyquinoline derivatives using in vivo alternative models, and the results confirm their potential to be developed as new drug candidates.
Collapse
Affiliation(s)
- B Pippi
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - A R Joaquim
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - S Merkel
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - R A Zanette
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - M E M Nunes
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica e Toxicologia, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - D G da Costa Silva
- Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Brazil
| | - L E Schimith
- Faculdade de Biotecnologia, Universidade Federal do Pampa, São Gabriel, Brazil
| | - M L Teixeira
- Laboratório de Farmacologia, Instituto Federal Catarinense, Concórdia, Brazil
| | - J L Franco
- Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal do Pampa, São Gabriel, Brazil
| | - S Fernandes de Andrade
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - A M Fuentefria
- Programa de Pós-Graduação em Microbiologia Agrícola e do Ambiente, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| |
Collapse
|
9
|
de Freitas Souza C, Baldissera MD, Baldisserotto B, Petrolli TG, da Glória EM, Zanette RA, Da Silva AS. Dietary vegetable choline improves hepatic health of Nile tilapia (Oreochromis niloticus) fed aflatoxin-contaminated diet. Comp Biochem Physiol C Toxicol Pharmacol 2020; 227:108614. [PMID: 31493584 DOI: 10.1016/j.cbpc.2019.108614] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 01/15/2023]
Abstract
Aflatoxin B1 (AFB1) is one of the most important mycotoxins due to its hepatotoxic and carcinogenic effects on animals. The effect of dietary supplementation with vegetable choline (VC) at 400, 800, and 1200 mg/kg against the deleterious effects of AFB1 (2 ppm/kg diet) in the liver of Nile tilapia (Oreochromis niloticus) was studied. The experimental period was 81 days, and the diet with VC was offered to the fish for 60 days prior to challenge with AFB1. Diets with AFB1 were tested in three replications and animals were analyzed at days 14 and 21 of dietary intake. The addition of VC to tilapia diet increased body weight (days 30 and 60 pre-challenge and day 21 post-challenge). The group fed aflatoxin-contaminated diet presented significantly reduced antioxidant enzymes and increased reactive oxygen species (ROS) levels, thiobarbituric acid reactive species (TBARS) levels, and protein carbonyl (PC) content in the liver. Dietary supplementation with VC at 800 and 1200 mg/kg demonstrated a significant protective effect, avoiding the increase of ROS, TBARS, and PC levels in the liver of tilapia from the aflatoxin contaminated groups. Thus, dietary VC supplementation may be used in tilapia to increase antioxidant status and reduce the negative effects caused by AFB1 toxicity. Based on the findings, it is recommended to use VC as a food supplement for Nile tilapia in order to avoid AFB1 toxication. In addition, decreased aflatoxin toxicity can be attributed to the VC antioxidant property.
Collapse
Affiliation(s)
- Carine de Freitas Souza
- Graduate Program in Toxicological Biochemistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS 97105-900, Brazil.
| | - Matheus Dellaméa Baldissera
- Graduate Program in Physiology and Pharmacology, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS 97105-900, Brazil
| | - Bernardo Baldisserotto
- Graduate Program in Physiology and Pharmacology, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS 97105-900, Brazil
| | - Tiago G Petrolli
- Graduate Program in Animal Health and Production on Small Farms, Universidade do Oeste de Santa Catarina, Xanxerê, Brazil
| | | | - Régis A Zanette
- Graduate Program in Biological Sciences: Pharmacology and Therapeutics, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-190, Brazil
| | - Aleksandro S Da Silva
- Graduate Program in Toxicological Biochemistry, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS 97105-900, Brazil; Graduate Program in Physiology and Pharmacology, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS 97105-900, Brazil.
| |
Collapse
|
10
|
Valadas J, Mocelin R, Sachett A, Marcon M, Zanette RA, Dallegrave E, Herrmann AP, Piato A. Propiconazole induces abnormal behavior and oxidative stress in zebrafish. Environ Sci Pollut Res Int 2019; 26:27808-27815. [PMID: 31342352 DOI: 10.1007/s11356-019-05977-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 07/12/2019] [Indexed: 05/07/2023]
Abstract
The use of pesticides has been growing along with the demand for agricultural products. These compounds, however, are not restricted to the field, spreading easily through the soil, contaminating groundwater and reaching urban centers. Propiconazole is a triazole fungicide that has been increasingly used in agriculture. However, there are few data about its effects on non-target organisms. This study aimed to evaluate the effects of propiconazole in zebrafish. The animals were exposed for 96 h to different concentrations of propiconazole (425, 850, 1700, 8500 ng/L), then submitted to the novel tank test for behavioral analyses. The brains were collected for evaluation of oxidative stress parameters. Exposure to propiconazole (1700 and 8500 ng/L) decreased the number of crossings, entries, and time spent in the top, and increased the time spent in the bottom area of the tank. We also observed an increase in the activities of superoxide dismutase and catalase in zebrafish brain exposed to propiconazole at 425, 850, and 1700 ng/L. We conclude that propiconazole alters normal fish behavior and disrupts oxidative status. More studies are necessary to elucidate the exact mechanism underlying the effects of propiconazole on non-target-organisms.
Collapse
Affiliation(s)
- Jéssica Valadas
- Programa de Pós-graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil
- Departamento de Farmacociências, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, 90050-170, Brazil
| | - Ricieri Mocelin
- Programa de Pós-graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil
| | - Adrieli Sachett
- Programa de Pós-graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil
| | - Matheus Marcon
- Programa de Pós-graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil
| | - Régis A Zanette
- Programa de Pós-graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, 90050-170, Brazil
| | - Eliane Dallegrave
- Departamento de Farmacociências, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, 90050-170, Brazil
| | - Ana P Herrmann
- Programa de Pós-graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, 90050-170, Brazil
| | - Angelo Piato
- Programa de Pós-graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil.
- Programa de Pós-graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, 90050-170, Brazil.
- Zebrafish Neuroscience Research Consortium (ZNRC), Slidell, LA, USA.
| |
Collapse
|
11
|
de Freitas Souza C, Baldissera MD, Descovi S, Zeppenfeld C, Eslava-Mocha PR, Gloria EM, Zanette RA, Baldisserotto B, Schafer da Silva A. Melaleuca alternifolia essential oil abrogates hepatic oxidative damage in silver catfish (Rhamdia quelen) fed with an aflatoxin-contaminated diet. Comp Biochem Physiol C Toxicol Pharmacol 2019; 221:10-20. [PMID: 30910599 DOI: 10.1016/j.cbpc.2019.03.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 02/22/2019] [Accepted: 03/21/2019] [Indexed: 02/07/2023]
Abstract
Mycotoxins are secondary metabolites produced by varieties of fungi that contaminate food and feed resources and are capable of inducing a wide range of toxicity. This problem is extensively aggravated due to the increasing replacement of fish meal by plant-derived proteins. Among the mycotoxins, aflatoxins have received a great deal of attention owing to their great prevalence in plant feedstuffs and to the detrimental effects on animals. The objective of this study was to evaluate whether dietary supplementation with tea tree (Melaleuca alternifolia) oil (TTO) would avoid or minimize the negative impacts on silver catfish (Rhamdia quelen) fed with aflatoxins-contaminated diets. Four treatments were tested: control (fish fed with a control diet); AFB (fish fed with a mycotoxin-contaminated diet - 1893 μg kg-1 of AFB1 and 52.2 μg kg-1 AFB2); TTO (fish fed with a control diet + 1 mL kg-1 of TTO), and TTO + AFB (fish fed with a mycotoxin contaminated diet - 2324 μg kg-1 of AFB1 and 43.5 μg kg-1 AFB2 + 1 mL kg-1 of TTO). Diets were tested in three replications and analyzed at days 5 and 10 of dietary intake. Significantly reduced antioxidant enzymes (SOD, GPx, and GST) and increased lipid peroxidation (LOOH) and protein carbonyl (PC) content in plasma and liver, with 16.6% mortality occurrence, were observed in the group fed aflatoxin-contaminated diet. Furthermore, aflatoxins also significantly increased plasmatic and hepatic ROS levels and decreased hepatic antioxidant capacity against peroxyl radical (ACAP) levels. Plasma cortisol levels were not altered by aflatoxicosis, but the intoxication induced hepatose. Notwithstanding, addition of TTO to the groups receiving aflatoxins showed a protective effect, avoiding the increase of ROS, LOOH, and PC levels in plasma and liver. Moreover, TTO treatment ameliorated the aflatoxin-associated liver damage. Thus, TTO supplementation at concentration of 1 mL kg-1 in feed may be used in fish to increase antioxidant status and reduce the negative effects caused by aflatoxins toxicity.
Collapse
Affiliation(s)
- Carine de Freitas Souza
- Programa de Pós-graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS 97105-900, Brazil.
| | - Matheus Dellaméa Baldissera
- Programa de Pós-graduação em Farmacologia, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS 97105-900, Brazil
| | - Sharine Descovi
- Programa de Pós-graduação em Farmacologia, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS 97105-900, Brazil
| | - Carla Zeppenfeld
- Programa de Pós-graduação em Farmacologia, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS 97105-900, Brazil
| | - Pedro Rene Eslava-Mocha
- Universidade de Los Llanos, Grupo de investigação em Sanidade de Organismos Aquáticos, Instituto de Aquicultura dos Llanos, Villa Vicencio, Meta 500017, Colombia
| | | | - Régis A Zanette
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Bernardo Baldisserotto
- Programa de Pós-graduação em Farmacologia, Universidade Federal de Santa Maria - UFSM, Santa Maria, RS 97105-900, Brazil
| | - Aleksandro Schafer da Silva
- Programa de Pós-graduação em Bioquímica Toxicológica, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS 97105-900, Brazil; Departmento de Ciência Animal, Universidade do Estado de Santa Catarina, Chapecó, RS, Brazil.
| |
Collapse
|
12
|
Fortuoso BF, Dos Reis JH, Gebert RR, Barreta M, Griss LG, Casagrande RA, de Cristo TG, Santiani F, Campigotto G, Rampazzo L, Stefani LM, Boiago MM, Lopes LQ, Santos RCV, Baldissera MD, Zanette RA, Tomasi T, Da Silva AS. Glycerol monolaurate in the diet of broiler chickens replacing conventional antimicrobials: Impact on health, performance and meat quality. Microb Pathog 2019; 129:161-167. [PMID: 30735801 DOI: 10.1016/j.micpath.2019.02.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/01/2019] [Accepted: 02/04/2019] [Indexed: 11/19/2022]
Abstract
Glycerol monolaurate (GML), known as lauric acid, is a chemical compound formed from lauric acid and glycerol that presents strong antimicrobial activity. Therefore, our hypothesis is that MGL can replace conventional antimicrobials, being a new alternative to poultry farming. The aim of this study was to evaluate whether the addition of GML as a replacement for antibiotics could have positive effects on health and performance of broiler chickens. For this, 240, one-day-old, Cobb 500 broiler chicks were weighed and randomly distributed into four groups with four repetitions each (n = 15). The control group, T0, received a basal diet containing antibiotic (60 ppm of bacitracin), while the T100, T200, and T300 groups received a basal diet supplemented with 100, 200, and 300 mg/kg of GML, respectively. The birds were weighed at intervals of seven days, as well as at the end of the experiment (day 42). Blood samples were collected for evaluating animal health, stool for counting bacteria and coccidian, as well as muscle (chest) to measure meat quality, respectively. At the end of the experiment (day 42), body weight, weight gain, and daily weight gain of broiler chickens in the T300 group were higher than the T0 group (P < 0.05). Indeed, feed conversion was lower compared to T0. Animals that received diets containing GML showed lower amounts of Eimeria spp. oocysts on day 42 in comparison to the control group. Low total bacterial counts on day 21 of the experiment were also observed in the treated groups. Conversely, plasma levels of total protein, globulins, uric acid, and glucose were higher in animals that received GML when compared to the control group. It was also observed higher carcass yields in the breast muscle of the T100 group when compared to other groups. Lower water holding capacity was observed in breast meat of animals of the groups T100, T200, and T300 when compared to T0. Histopathological findings were compatible with coccidiosis, and the degree of these lesions did not differ among groups. Based on these results, GML in the diets of broiler chickens, showing potent antimicrobial effect, growth promoter capacity, and lack of toxicity. Therefore, GML is a promising alternative to replace conventional antimicrobials used in the diets of broiler chickens.
Collapse
Affiliation(s)
- Bruno F Fortuoso
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - João H Dos Reis
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - Roger R Gebert
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - Mauricio Barreta
- Graduate Program in Zootecnia, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - Luiz Gustavo Griss
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - Renata A Casagrande
- Graduate Program in Animal Science, Universidade do Estado de Santa Catarina (UDESC), Lages, Brazil
| | - Thierry G de Cristo
- Graduate Program in Animal Science, Universidade do Estado de Santa Catarina (UDESC), Lages, Brazil
| | - Fábio Santiani
- Graduate Program in Animal Science, Universidade do Estado de Santa Catarina (UDESC), Lages, Brazil
| | - Gabriela Campigotto
- Graduate Program in Zootecnia, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - Luana Rampazzo
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - Lenita M Stefani
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil; Graduate Program in Zootecnia, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - Marcel M Boiago
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil; Graduate Program in Zootecnia, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - Leonardo Q Lopes
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, Brazil
| | - Roberto C V Santos
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, Brazil
| | - Matheus D Baldissera
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, Brazil
| | - Régis A Zanette
- Department of Pharmacology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Thainã Tomasi
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil
| | - Aleksandro S Da Silva
- Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil; Graduate Program in Zootecnia, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Brazil.
| |
Collapse
|
13
|
Waller SB, Hoffmann JF, Madrid IM, Picoli T, Cleff MB, Chaves FC, Zanette RA, de Mello JRB, de Faria RO, Meireles MCA. Polar Origanum vulgare (Lamiaceae) extracts with antifungal potential against Sporothrix brasiliensis. Med Mycol 2018; 56:225-233. [PMID: 28482071 DOI: 10.1093/mmy/myx031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Accepted: 04/03/2017] [Indexed: 12/14/2022] Open
Abstract
Oregano (Origanum vulgare) has anti-Sporothrix spp. activity, including against strains that are resistant to antifungal drugs. As the studies are limited to the essential oil, the aim of this study was to evaluate the chemical, antioxidant and cytotoxic properties of polar oregano extracts and their anti-Sporothrix brasiliensis activity. Aerial plant parts were used in the preparation of 10 min (INF10) and 60 min (INF60) infusions, a decoction (DEC) and a hydroalcoholic extract (HAE). Six phenolic acids and four flavonoids were identified and quantified through liquid-chromatography (LC-MS). Extracts in increasing order of total phenolic and flavonoid contents were HAE<INF60<INF10<DEC and HAE<DEC<INF60<INF10, respectively. All extracts showed DPPH and ABTS radical scavenging potential (HAE<INF60<DEC<INF10). HAE showed the least toxicity toward MDCK and CRFK cell lines in the MTT colorimetric assay. The antifungal potential against 29 S. brasiliensis isolates obtained from cats and dogs was evaluated following the CLSI M38-A2 protocol adapted to natural products. Minimum inhibitory concentration for 50% of the isolates (MIC50) was 5 mg/ml for all extracts, and minimum fungicidal concentration for 50% of the isolates (MFC50) was 20 mg/ml for INF10 and 40 mg/ml for the remaining extracts. MIC90 was 10 mg/ml for all extracts, except for DEC (20 mg/ml). MFC90 was 40 mg/ml for INF10 and > 40 mg/ml for the other extracts. This is the first report of oregano extracts showing antifungal activity against S. brasiliensis. Its use in the treatment of sporotrichosis may be considered upon toxicity and safe-use conditions are tested.
Collapse
Affiliation(s)
| | - Jéssica Fernanda Hoffmann
- Department of Agroindustrial Science and Technology, Federal University of Pelotas, Pelotas, RS, Brazil
| | | | - Tony Picoli
- Department of Preventive Veterinary, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Marlete Brum Cleff
- Departament of Veterinary Clinics, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Fabio Clasen Chaves
- Department of Agroindustrial Science and Technology, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Régis A Zanette
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - João Roberto Braga de Mello
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | | |
Collapse
|
14
|
Merkel S, Heidrich D, Danilevicz CK, Scroferneker ML, Zanette RA. Drosophila melanogaster as a model for the study of Malassezia pachydermatis infections. Vet Microbiol 2018; 224:31-33. [DOI: 10.1016/j.vetmic.2018.08.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 08/21/2018] [Accepted: 08/21/2018] [Indexed: 12/01/2022]
|
15
|
Bitencourt PER, Cargnelutti LO, Stein CS, Lautenchleger R, Ferreira LM, Sangoi M, Denardi L, Borges RM, Boligon A, Moresco RN, Cruz L, Zanette RA, Alves SH, Moretto MB. Nanoparticle formulation increases Syzygium cumini antioxidant activity in Candida albicans-infected diabetic rats. Pharm Biol 2017; 55:1082-1088. [PMID: 28193098 PMCID: PMC6130601 DOI: 10.1080/13880209.2017.1283338] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 01/12/2017] [Accepted: 01/13/2017] [Indexed: 06/06/2023]
Abstract
CONTEXT Syzygium cumini (L.) Skeels (Myrtaceae) is a medicinal plant widely used in folk medicine for the treatment of diabetes mellitus (DM). However, studies on the use of this plant and of nanoparticle formulations against DM-related fungal infections are scarce. OBJECTIVE To evaluate the effect of the treatments with aqueous seed extract of S. cumini (ASc) and ASc-loaded polymeric nanoparticles (NPASc) on biochemical parameters in Candida albicans-infected diabetic rats. MATERIALS AND METHODS Male Wistar rats were divided into eight groups: Control, DM, C. albicans, C. albicans + ASc, C. albicans + NPASc, DM + C. albicans, DM + C. albicans + ASc and DM + C. albicans + NPASc. Rats were daily treated with ASc or NPASc (100 mg/kg) for 21 days. Biochemical parameters in serum and urine, advanced oxidation protein product (AOPP) and TBARS levels in the serum, kidney, liver and pancreas and N-acetyl-β-d-glucosaminidase (NAG) activities in kidney and urine were evaluated. RESULTS Biochemical and oxidative stress parameters increased in rats with DM and/or candidiasis. NPASc was more effective than ASc in decreasing glucose (56%), cholesterol (33%) and creatinine (51%) levels; serum (16%) and pancreatic (46%) AOPP and renal (48%) TBARS levels when compared with DM + C. albicans group. In C. albicans group, both treatments decreased NAG activity but did not decrease creatinine levels. CONCLUSIONS These data suggest that the use of nanotechnology is able to improve plant extract properties such as antioxidant activity that may be useful in diabetes-related complications.
Collapse
MESH Headings
- Animals
- Antifungal Agents/chemistry
- Antifungal Agents/isolation & purification
- Antifungal Agents/pharmacology
- Antioxidants/chemistry
- Antioxidants/isolation & purification
- Antioxidants/pharmacology
- Biomarkers/blood
- Biomarkers/urine
- Candida albicans/drug effects
- Candidiasis/blood
- Candidiasis/drug therapy
- Candidiasis/microbiology
- Candidiasis/urine
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/chemically induced
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Experimental/urine
- Diabetes Mellitus, Type 1/blood
- Diabetes Mellitus, Type 1/chemically induced
- Diabetes Mellitus, Type 1/drug therapy
- Diabetes Mellitus, Type 1/urine
- Drug Compounding
- Kidney/drug effects
- Kidney/metabolism
- Liver/drug effects
- Liver/metabolism
- Male
- Nanoparticles
- Oxidative Stress/drug effects
- Pancreas/drug effects
- Pancreas/metabolism
- Phytotherapy
- Plant Extracts/chemistry
- Plant Extracts/isolation & purification
- Plant Extracts/pharmacology
- Plants, Medicinal
- Rats, Wistar
- Seeds
- Solvents/chemistry
- Streptozocin
- Syzygium/chemistry
Collapse
Affiliation(s)
- Paula E. R. Bitencourt
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Lariane O. Cargnelutti
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Carolina S. Stein
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Raquel Lautenchleger
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Luana M. Ferreira
- Departamento de Farmácia Industrial, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Manuela Sangoi
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Laura Denardi
- Departamento de Microbiologia, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Raphaela M. Borges
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Aline Boligon
- Departamento de Farmácia Industrial, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Rafael N. Moresco
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Letícia Cruz
- Departamento de Farmácia Industrial, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Régis A. Zanette
- Programa de Pós-Graduação em Ciências Biológicas: Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Sydney H. Alves
- Departamento de Microbiologia, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Maria Beatriz Moretto
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, Brazil
| |
Collapse
|
16
|
Rossato L, Loreto ÉS, Zanette RA, Chassot F, Santurio JM, Alves SH. In vitro synergistic effects of chlorpromazine and sertraline in combination with amphotericin B against Cryptococcus neoformans var. grubii. Folia Microbiol (Praha) 2016; 61:399-403. [DOI: 10.1007/s12223-016-0449-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 01/27/2016] [Indexed: 11/29/2022]
|
17
|
Zanette RA, Bitencourt PER, Kontoyiannis DP, Fighera RA, Flores MM, Kommers GD, Silva PS, Ludwig A, Moretto MB, Alves SH, Santurio JM. Complex interaction of deferasirox and Pythium insidiosum: iron-dependent attenuation of growth in vitro and immunotherapy-like enhancement of immune responses in vivo. PLoS One 2015; 10:e0118932. [PMID: 25738758 PMCID: PMC4349436 DOI: 10.1371/journal.pone.0118932] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 01/07/2015] [Indexed: 12/22/2022] Open
Abstract
Pythium insidiosum iron acquisition mechanisms are unknown. We previously showed that the iron chelator deferasirox had weak activity in vitro and in rabbits with experimental pythiosis. Here we show that deferasirox causes damage to P. insidiosum hyphae in vitro, but that activity is diminished in the presence of exogenous iron. The tissue activity of the proinflammatory enzyme adenosine deaminase and the histological pattern observed in pythiosis lesions of rabbits treated with deferasirox were similar to the ones in animals treated with immunotherapy.
Collapse
Affiliation(s)
- Régis A. Zanette
- Graduate Program in Pharmacology, Health Science Center, Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Paula E. R. Bitencourt
- Graduate Program in Pharmaceutical Sciences, Health Science Center, UFSM, Santa Maria, RS, Brazil
| | - Dimitrios P. Kontoyiannis
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Rafael A. Fighera
- Graduate Program in Veterinary Medicine, Health Science Center, UFSM, Santa Maria, RS, Brazil
| | - Mariana M. Flores
- Graduate Program in Veterinary Medicine, Health Science Center, UFSM, Santa Maria, RS, Brazil
| | - Glaucia D. Kommers
- Graduate Program in Veterinary Medicine, Health Science Center, UFSM, Santa Maria, RS, Brazil
| | - Priscila S. Silva
- Graduate Program in Pharmaceutical Sciences, Health Science Center, UFSM, Santa Maria, RS, Brazil
| | - Aline Ludwig
- Graduate Program in Pharmacology, Health Science Center, Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Maria B. Moretto
- Graduate Program in Pharmaceutical Sciences, Health Science Center, UFSM, Santa Maria, RS, Brazil
| | - Sydney H. Alves
- Graduate Program in Pharmacology, Health Science Center, Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil
- Graduate Program in Pharmaceutical Sciences, Health Science Center, UFSM, Santa Maria, RS, Brazil
| | - Janio M. Santurio
- Graduate Program in Pharmacology, Health Science Center, Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil
- * E-mail:
| |
Collapse
|
18
|
Zimmermann CEP, Cruz IBM, Cadoná FC, Machado AK, Assmann C, Schlemmer KB, Zanette RA, Leal DBR, Santurio JM. Cytoprotective and genoprotective effects of β-glucans against aflatoxin B₁-induced DNA damage in broiler chicken lymphocytes. Toxicol In Vitro 2015; 29:538-43. [PMID: 25615424 DOI: 10.1016/j.tiv.2015.01.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Revised: 01/05/2015] [Accepted: 01/09/2015] [Indexed: 11/24/2022]
Abstract
The polysaccharide β-glucan presents beneficial effects on the immune system, although the mechanisms of the immunomodulatory effect remain poorly understood. The potential cytoprotective and genoprotective effects of β-glucans were evaluated in broiler chicken lymphocytes exposed to increasing concentrations of aflatoxin B₁ (AFB₁) and/or β-glucans. AFB₁ significantly decreased cell viability at the concentrations of 10 and 20 μg/ml at 72 h of incubation (p<0.01 and p<0.001, respectively). Moreover, the AFB₁ concentrations of 1, 10 and 20 μg/ml increased DNA fragmentation levels at 24 h (p<0.001). Conversely, lymphocyte death was prevented by β-glucans at the concentrations of 1% and 10%, indicating a cytoprotective effect. Reactive oxygen species levels were increased in the cells treated with 20 μg/ml AFB₁ at 24 h (p<0.05) and 10% β-glucans with or without AFB₁ at 24, 48 and 72 h of incubation (p<0.001). DNA damage increased by more than 100% in AFB₁-treated lymphocytes when compared to control group. β-glucans at 1% was able to fully revert the AFB₁-induced lymphocyte DNA damage, indicating a genoprotective effect and maintaining DNA integrity. In conclusion, β-glucans showed in vitro dose-dependent cytoprotective and genoprotective effects in broiler chicken lymphocytes exposed to AFB₁.
Collapse
Affiliation(s)
- C E P Zimmermann
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - I B M Cruz
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil; Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - F C Cadoná
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - A K Machado
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - C Assmann
- Laboratório de Biogenômica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - K B Schlemmer
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - R A Zanette
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - D B R Leal
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - J M Santurio
- Programa de Pós-Graduação em Farmacologia, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
| |
Collapse
|
19
|
Lautert C, Ferreiro L, Zimmermann CE, Castilhos LG, Jesus FPD, Zanette RA, Leal DB, Santurio JM. Efeitos in vitro de ocratoxina A, deoxinivalenol e zearalenona sobre a viabilidade celular e atividade de E-ADA em linfócitos de frangos de corte. Pesq Vet Bras 2014. [DOI: 10.1590/s0100-736x2014001200005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Micotoxinas representam um vasto grupo de contaminantes químicos naturais originados a partir do metabolismo secundário de fungos filamentosos patogênicos. Elas são produzidas, principalmente, pelos gêneros Fusarium, Alternaria, Aspergillus e Penicillium, os quais podem contaminar grãos e cereais, como trigo, milho e soja. Conforme sua natureza e níveis de concentração, micotoxinas podem induzir efeitos tóxicos em animais de produção e humanos. Um estudo in vitro foi realizado para avaliar a susceptibilidade das células linfocitárias de frangos de corte a diferentes concentrações de ocratoxina A, deoxinivalenol e zearalenona. Cada micotoxina foi adicionada ao meio celular em diferentes concentrações (0,001; 0,01; 0,1 e 1μg/mL). A viabilidade celular e atividade de ecto-adenosina desaminase foram analisadas em 24, 48 e 72 horas através de ensaios colorimétricos. Para isso, foram utilizados 0,7x10(5) linfócitos/mL em meio RPMI 1640, suplementado com 10% de soro fetal bovino e 2,5 UI de penicilina/estreptomicina por mL, incubados em atmosfera de 5% de CO2 a 37 °C. Todos os experimentos foram realizados em triplicata e os resultados foram expressos como média e erro padrão da média. Os resultados obtidos demonstraram que tanto ocratoxina A como deoxinivalenol induziram proliferação linfocitária e baixa atividade enzimática in vitro (P<0,05), enquanto zearalenona também induziu proliferação (P<0,05), mas nenhuma alteração na atividade enzimática (P>0,05). Foi possível correlacionar os dados referentes à viabilidade celular e atividade de ecto-adenosina desaminase, sugerindo que, em concentrações mínimas, as micotoxinas testadas não estimularam a atividade da enzima, que possui ação pró-inflamatória e contribui para o processo de imunossupressão e, portanto, evitando um decréscimo na viabilidade celular. Este é o primeiro estudo feito com OCRA, DON e ZEA sobre linfócitos de frangos de corte em cultivos in vitro na avaliação desses parâmetros.
Collapse
|
20
|
Zimmermann CEP, Machado AK, Cadoná FC, Jaques JAS, Schlemmer KB, Lautert C, Cruz IBM, Zanette RA, Leal DBR, Santurio JM. In-vitro cytotoxicity of aflatoxin B1 to broiler lymphocytes of broiler chickens. Rev Bras Cienc Avic 2014. [DOI: 10.1590/1516-635x1603307-312] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | - AK Machado
- Universidade Federal de Santa Maria, Brazil
| | - FC Cadoná
- Universidade Federal de Santa Maria, Brazil
| | - JAS Jaques
- Universidade Federal de Santa Maria, Brazil
| | | | - C Lautert
- Universidade Federal do Rio Grande do Sul, Brazil
| | - IBM Cruz
- Universidade Federal de Santa Maria, Brazil; Universidade Federal de Santa Maria, Brazil
| | - RA Zanette
- Universidade Federal de Santa Maria, Brazil
| | - DBR Leal
- Universidade Federal de Santa Maria, Brazil
| | | |
Collapse
|
21
|
dos Santos CE, Ubiali DG, Pescador CA, Zanette RA, Santurio JM, Marques LC. Epidemiological Survey of Equine Pythiosis in the Brazilian Pantanal and Nearby Areas: Results of 76 Cases. J Equine Vet Sci 2014. [DOI: 10.1016/j.jevs.2013.06.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
22
|
Zanette RA, Santurio JM, Loreto ÉS, Alves SH, Kontoyiannis DP. Toll-deficient Drosophila is susceptible to Pythium insidiosum infection. Microbiol Immunol 2013; 57:732-5. [PMID: 23865688 DOI: 10.1111/1348-0421.12082] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 07/10/2013] [Accepted: 07/12/2013] [Indexed: 02/03/2023]
Abstract
There is a paucity of animal models of pythiosis, a life-threatening disease of humans and animals, the immunopathogenesis of which is poorly understood. A pythiosis model was developed by injecting Toll (Tl)-deficient Drosophila melanogaster flies with Pythium insidiosum zoospores. The infected Tl mutant flies had significantly lower survival rates (73.7%) than did control flies. This study reveals the important role of Tl pathway activation in fly immune response to pythiosis.
Collapse
Affiliation(s)
- Régis A Zanette
- Graduate Program in Pharmacology, Federal University of Santa Maria, Avenida Roraima, 1000, Santa Maria, RS, 97105-900, Brazil; Department of Infectious Diseases, Infection Control and Employee Health, University of Texas M.D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | | | | | | | | |
Collapse
|
23
|
Zanette RA, Ferreiro L, Alves SH, Jesus FP, Lautert C, Spanamberg A, Santurio JM. Enzymatic variability among Brazilian Pythium insidiosum isolates. Rev Iberoam Micol 2013; 30:264-6. [DOI: 10.1016/j.riam.2012.12.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 12/08/2012] [Accepted: 12/11/2012] [Indexed: 11/29/2022] Open
|
24
|
Zanette RA, Kontoyiannis DP. Paradoxical effect to caspofungin in Candida species does not confer survival advantage in a Drosophila model of candidiasis. Virulence 2013; 4:497-8. [PMID: 23863608 PMCID: PMC5359725 DOI: 10.4161/viru.25523] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
|
25
|
Zanette RA, Kontoyiannis DP. Pre-exposure of Candida species to cytarabine and daunorubicin does not affect their in vitro antifungal susceptibility and virulence in flies. Virulence 2013; 4:344-6. [PMID: 23611830 DOI: 10.4161/viru.24387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
26
|
Bitencourt PER, Bellé LP, Bonfanti G, Cargnelutti LO, Bona KSD, Silva PS, Abdalla FH, Zanette RA, Guerra RB, Funchal C, Moretto MB. Differential effects of organic and inorganic selenium compounds on adenosine deaminase activity and scavenger capacity in cerebral cortex slices of young rats. Hum Exp Toxicol 2013; 32:942-9. [DOI: 10.1177/0960327113479045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Selenium (Se) has anti-inflammatory and antioxidant properties and is necessary for the development and normal function of the central nervous system. This study was aimed to compare the in vitro effects of 3-methyl-1-phenyl-2-(phenylseleno)oct-2-en-1-one (C21H2HOSe; organoselenium) and sodium selenate (inorganic Se) on adenosine deaminase (ADA) activity, cell viability, lipid peroxidation, scavenger of nitric oxide (NO) and nonprotein thiols (NP-SH) content in the cerebral cortex slices of the young rats. A decrease in ADA activity was observed when the slices were exposed to organoselenium at the concentrations of 1, 10 and 30 µM. The same compound showed higher scavenger capacity of NO than the inorganic compound. Inorganic Se was able to protect against sodium nitroprusside-induced oxidative damage and increased the NP-SH content. Both the compounds displayed distinctive antioxidant capacities and were not cytotoxic for the cerebral cortex slices in the conditions tested. These findings are likely to be related to immunomodulatory and antioxidant properties of this compound.
Collapse
Affiliation(s)
- PER Bitencourt
- Postgraduate Program in Pharmaceutical Sciences, Health Science Center, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - LP Bellé
- Postgraduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - G Bonfanti
- Postgraduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - LO Cargnelutti
- Postgraduate Program in Pharmaceutical Sciences, Health Science Center, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - KS de Bona
- Postgraduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - PS Silva
- Postgraduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - FH Abdalla
- Postgraduate Program in Pharmaceutical Sciences, Health Science Center, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - RA Zanette
- Postgraduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - RB Guerra
- Federal Institute of Education, Science and Technology of Rio Grande do Sul, Sertão, RS, Brazil
| | - C Funchal
- Postgraduate Program in Biosciences and Rehabilitation, Methodist University Center, IPA, Porto Alegre, RS, Brazil
| | - MB Moretto
- Postgraduate Program in Pharmaceutical Sciences, Health Science Center, Federal University of Santa Maria, Santa Maria, RS, Brazil
- Postgraduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| |
Collapse
|
27
|
Gressler LT, Da Silva AS, Machado G, Dalla Rosa L, Dorneles F, Gressler LT, Oliveira MS, Zanette RA, de Vargas ACP, Monteiro SG. Susceptibility of Trypanosoma evansi to propolis extract in vitro and in experimentally infected rats. Res Vet Sci 2012; 93:1314-7. [PMID: 22405907 DOI: 10.1016/j.rvsc.2012.02.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Revised: 02/02/2012] [Accepted: 02/12/2012] [Indexed: 12/29/2022]
Abstract
Current therapy of Trypanosoma evansi infections is not effective for the vast majority of animals with relapsing parasitemia and clinical signs. Recently, attention is being focused on the antiparasitic activity of propolis. This study evaluated the susceptibility of T. evansi to propolis extract in vitro and in vivo. A dose-dependent trypanocidal activity of propolis extract was observed in vitro. All trypomastigotes were killed 1 h after incubation with 10 μg mL(-1) of the extract. In vivo, the concentrations of 100, 200, 300 and 400 mg kg(-1) administered orally for 10 consecutive days showed no curative effect, and the rats died from the disease. However, rats treated with the two highest concentrations of propolis extract showed higher longevity than the other groups. Based on these data, we concluded that T. evansi is susceptible to propolis in vitro. Despite the lack of curative efficacy observed in vivo at the concentrations tested, the propolis extract can prolong life in rats infected with the protozoan.
Collapse
Affiliation(s)
- Lucas T Gressler
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Da Silva AS, Castro VS, Tonin AA, Brendler S, Costa MM, Jaques JA, Bertoletti B, Zanette RA, Raiser AG, Mazzanti CM, Lopes ST, Monteiro SG. Secnidazole for the treatment of giardiasis in naturally infected cats. Parasitol Int 2011; 60:429-32. [DOI: 10.1016/j.parint.2011.06.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 06/18/2011] [Accepted: 06/24/2011] [Indexed: 11/28/2022]
|
29
|
Da Silva AS, Wolkmer P, Nunes JT, Duck MR, Oliveira CB, Gressler LT, Costa MM, Zanette RA, Mazzanti CM, Lopes ST, Monteiro SG. Susceptibility of Trypanosoma evansi to cordycepin. Biomed Pharmacother 2011; 65:220-3. [DOI: 10.1016/j.biopha.2011.02.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 02/07/2011] [Indexed: 10/18/2022] Open
|
30
|
Stainki DR, Pedrozo JCSR, Gaspar LFJ, Zanette RA, da Silva AS, Monteiro SG. Urethral obstruction by Dioctophyma renale in puppy. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s00580-010-1169-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
31
|
Martins DB, Zanette RA, França RT, Howes F, Azevedo MI, Botton SA, Mazzanti C, Lopes STA, Santurio JM. Massive cryptococcal disseminated infection in an immunocompetent cat. Vet Dermatol 2010; 22:232-4. [PMID: 21182547 DOI: 10.1111/j.1365-3164.2010.00948.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
32
|
Da Silva AS, Garcia Perez HA, Costa MM, França RT, De Gasperi D, Zanette RA, Amado JA, Lopes STA, Teixeira MMG, Monteiro SG. Horses naturally infected by Trypanosoma vivax in southern Brazil. Parasitol Res 2010; 108:23-30. [PMID: 20820805 DOI: 10.1007/s00436-010-2036-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Accepted: 08/20/2010] [Indexed: 11/25/2022]
Abstract
In this study, we reported the first outbreak of the infection by Trypanosoma vivax in horses in southern Brazil, a non-endemic region where bovines have only recently been found infected by this trypanosome species. We evaluated 12 horses from a farm in southern Brazil, where four horses displayed pale mucous membranes, fever, weight loss, and swelling of abdomen, prepuce, or vulva. The diagnosis of T. vivax was confirmed in four horses by morphological parameters of trypomastigotes in blood smears and species-specific PCR. All T. vivax-infected animals showed anemia, and most showed increased levels of beta-1, beta-2, and gamma globulins. Horses were treated with diminazene aceturate, but cure was not achieved, and the disease relapsed after therapy. These findings demonstrated that Brazilian T. vivax isolates, which were already reported infecting cattle, buffaloes, goats, and sheep, can be highly pathogenic for horses, causing severe disease and even death of the animals due to the recurrence of the infection.
Collapse
Affiliation(s)
- Aleksandro S Da Silva
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria, Faixa de Camobi-Km 9, Campus Universitário, Prédio 20, Sala 4232, Santa Maria, RS, Brazil, 97105-900.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Reginatto AR, Farret MH, Fanfa VR, Da Silva AS, Zanette RA, Tonin AA, Monteiro SG. Report of cryptosporidiosis in gray brocket deer (Mazama gouazoupira) in southern Brazil. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s00580-010-1044-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
34
|
Da Silva AS, Wolkmer P, Costa MM, Tonin AA, Eilers TL, Gressler LT, Otto MA, Zanette RA, Santurio JM, Lopes STA, Monteiro SG. Biochemical changes in cats infected with Trypanosoma evansi. Vet Parasitol 2010; 171:48-52. [PMID: 20338691 DOI: 10.1016/j.vetpar.2010.02.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Revised: 02/24/2010] [Accepted: 02/25/2010] [Indexed: 10/19/2022]
Abstract
This study aimed at evaluating biochemical changes of cats (Felis catus) experimentally infected with Trypanosoma evansi. Seven animals were infected with 10(8) blood trypomastigotes per animal and six were used as controls. Blood smears were performed daily for 56 days and the hepatic, renal and muscular parameters in blood serum were evaluated at days 0, 7, 21, 35 and 49. The protozoan was found in the bloodstream 24-48 h post-inoculation (PI) and irregular peaks of parasitemia were observed throughout the experiment. Muscular enzymatic activities (aspartate aminotransferase and creatine kinase) were increased in infected cats compared to controls. Increased concentrations of total proteins and globulins and decreased levels of albumin and albumin/globulin ratio were observed in infected group versus the controls values (P<0.05). No alteration in serum activity of alanine aminotransferase, gamma-glutamyltransferase, creatinine and urea was observed in both groups.
Collapse
Affiliation(s)
- Aleksandro S Da Silva
- Department of Microbiology and Parasitology, Universidade Federal de Santa Maria, Santa Maria-RS, Brazil.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Santurio JM, Zanette RA, Da Silva AS, De La Rue ML, Monteiro SG, Alves SH. Improved method for Duddingtonia flagrans chlamydospores production for livestock use. Vet Parasitol 2009; 164:344-6. [DOI: 10.1016/j.vetpar.2009.05.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Revised: 04/09/2009] [Accepted: 05/06/2009] [Indexed: 10/20/2022]
|
36
|
Da Silva AS, Hoehne L, Tonin AA, Zanette RA, Wolkmer P, Costa MM, Moraes DP, Flores ÉM, Santurio JM, Lopes ST, Monteiro SG. Trypanosoma evansi: Levels of copper, iron and zinc in the bloodstream of infected cats. Exp Parasitol 2009; 123:35-8. [DOI: 10.1016/j.exppara.2009.05.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2009] [Revised: 04/03/2009] [Accepted: 05/12/2009] [Indexed: 11/26/2022]
|
37
|
Cavalheiro AS, Zanette RA, Spader TB, Lovato L, Azevedo MI, Botton S, Alves SH, Santurio JM. In vitro activity of terbinafine associated to amphotericin B, fluvastatin, rifampicin, metronidazole and ibuprofen against Pythium insidiosum. Vet Microbiol 2009; 137:408-11. [PMID: 19269752 DOI: 10.1016/j.vetmic.2009.01.036] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Revised: 01/20/2009] [Accepted: 01/22/2009] [Indexed: 01/18/2023]
Abstract
We evaluated the in vitro activities of terbinafine alone and in combination with amphotericin B, fluvastatin, rifampicin, metronidazole or ibuprofen against 17 clinical isolates of Pythium insidiosum. The assays were based on technique M38-A2, as well as the checkerboard microdilution method. The main synergism observed was by combination of terbinafine plus amphotericin B (41.18%). Antagonisms were observed in combinations of terbinafine with fluvastatin (35.30%) or rifampicin (5.88%).
Collapse
Affiliation(s)
- Ayrton S Cavalheiro
- Departamento de Microbiologia e Parasitologia, Laboratório de Pesquisas Micológicas (LAPEMI), Universidade Federal de Santa Maria (UFSM), Avenida Roraima, 1000, Cidade Universitária, Bairro Camobi, Santa Maria-RS, 97105-900, Brazil
| | | | | | | | | | | | | | | |
Collapse
|
38
|
da Silva AS, Zanette RA, Lara VM, Gressler LT, Carregaro AB, Santurio JM, Monteiro SG. Gastrointestinal parasites of owls (Strigiformes) kept in captivity in the Southern region of Brazil. Parasitol Res 2008; 104:485-7. [PMID: 19005679 DOI: 10.1007/s00436-008-1257-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2008] [Accepted: 10/28/2008] [Indexed: 10/21/2022]
Abstract
The aim of this research was to study the gastrointestinal parasitism in 12 adult owls kept in captivity in the Southern region of Brazil. Cloacal contents of the species Rhinoptynx clamator, Tyto alba, Athene cunicularia, Megascops spp., and Bubo virginianus were evaluated. Feces and urine were collected and analyzed by the zinc sulfate centrifugal-flotation method and stained by the modified Ziehl-Neelsen technique. Eggs of Capillaria spp. and Strongylida, oocysts of Cryptosporidium spp., Eimeria spp., and Isospora spp. were observed. The birds showed no clinical signs, probably due to the mild nature of the infection.
Collapse
Affiliation(s)
- Aleksandro S da Silva
- Department of Microbiology, Universidade Federal de Santa Maria, Faixa de Camobi, Km 9, Campus Universitário, Prédio 20, Sala 4232, 97105-900 Santa Maria, RS, Brazil.
| | | | | | | | | | | | | |
Collapse
|
39
|
Otto MA, Da Silva AS, Zanette RA, Schmitt L, Monteiro SG. [Infestation by Ornithocoris sp. at dwellings in the Municipality of Santa Maria, Rio Grande do Sul State, Brazil]. Rev Bras Parasitol Vet 2008; 17 Suppl 1:99-101. [PMID: 20059826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/14/2008] [Indexed: 05/28/2023]
Abstract
Ornithocoris is a Hemiptera of the family Cimicidae that parasitizes wild and domestic birds. We considered opportune to report two isolate cases of parasitism by Ornithocoris sp. at dwellings in the municipality of Santa Maria, RS. In both cases, the residents reported the presence of insects at the night, besides intense prurid and red spots, typical of insect bites. All residents were affected, besides a dog. A great quantity of Ornithocors sp. specimens was seen on the walls, bed and leg of a child, while sleeping. Both cases occurred in the spring season when bird nests were seen near houses. It suggests that this blood sucking insect fed on humans in the absence of birds, their natural hosts.
Collapse
Affiliation(s)
- Mateus A Otto
- Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | | | | | | | | |
Collapse
|
40
|
Zanette RA, da Silva AS, Lunardi F, Santurio JM, Monteiro SG. Occurrence of gastrointestinal protozoa in Didelphis albiventris (opossum) in the central region of Rio Grande do Sul state. Parasitol Int 2007; 57:217-8. [PMID: 18035587 DOI: 10.1016/j.parint.2007.10.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2007] [Revised: 10/02/2007] [Accepted: 10/02/2007] [Indexed: 10/22/2022]
Abstract
The aim of this study was to evaluate the parasitism by gastrointestinal protozoa in Didelphis albiventris (opossum) in the central region of Rio Grande do Sul state. Fecal samples from six free living opossums were collected for research of parasites. Samples were analyzed by the centrifugal-flotation method with zinc sulfate and parasites were identified microscopically based on (oo)cyst size and morphology. Cysts of Giardia sp. and oocysts of Cryptosporidium sp. and Eimeria sp. were observed in four of the six opossums. All four infected marsupials showed mild infection by protozoa. This is the first report of Giardia sp. in D. albiventris.
Collapse
Affiliation(s)
- Régis A Zanette
- Departamento de Microbiologia e Parasitologia da Universidade Federal de Santa Maria, Camobi - 9, Prédio 20, Sala 4232. 97105900. Santa Maria - RS, Brazil
| | | | | | | | | |
Collapse
|