1
|
Colares JR, Hartmann RM, Schemitt EG, Fonseca SRB, Brasil MS, Picada JN, Dias AS, Bueno AF, Marroni CA, Marroni NP. Melatonin prevents oxidative stress, inflammatory activity, and DNA damage in cirrhotic rats. World J Gastroenterol 2022; 28:348-364. [PMID: 35110954 PMCID: PMC8771613 DOI: 10.3748/wjg.v28.i3.348] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/24/2021] [Accepted: 01/10/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Cirrhosis is an important health problem characterized by a significant change in liver parenchyma. In animals, this can be reproduced by an experimental model of bile duct ligation (BDL). Melatonin (MLT) is a physiological hormone synthesized from serotonin that has been studied for its beneficial properties, including its antioxidant potential.
AIM To evaluate MLT’s effects on oxidative stress, the inflammatory process, and DNA damage in an experimental model of secondary biliary cirrhosis.
METHODS Male Wistar rats were divided into 4 groups: Control (CO), CO + MLT, BDL, and BDL + MLT. MLT was administered (20 mg/kg) daily beginning on day 15 after biliary obstruction. On day 29 the animals were killed. Blood samples, liver tissue, and bone marrow were collected for further analysis.
RESULTS BDL caused changes in biochemical and histological parameters and markers of inflammatory process. Thiobarbituric acid (0.46 ± 0.01) reactive substance levels, superoxide dismutase activity (2.30 ± 0.07) and nitric oxide levels (2.48 ± 0.36) were significantly lower (P < 0.001) n the groups that received MLT. DNA damage was also lower (P < 0.001) in MLT-treated groups (171.6 ± 32.9) than the BDL-only group (295.5 ± 34.8). Tissue damage and the expression of nuclear factor kappa B, interleukin-1β, Nrf2, NQO1 and Hsp70 were significantly lower in animals treated with MLT (P < 0.001).
CONCLUSION When administered to rats with BDL-induced secondary biliary cirrhosis, MLT effectively restored the evaluated parameters.
Collapse
Affiliation(s)
- Josieli R Colares
- Medical Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Brazil
| | - Renata M Hartmann
- Medical Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Brazil
| | - Elizângela G Schemitt
- Medical Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Brazil
| | - Sandielly R B Fonseca
- Medical Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Brazil
| | - Marilda S Brasil
- Biological Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Brazil
| | - Jaqueline N Picada
- Cellular and Molecular Biology Program, Lutheran University of Brazil (ULBRA), Canoas 92425-900, Brazil
| | - Alexandre S Dias
- Pneumological Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Brazil
| | - Aline F Bueno
- Pneumological Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Brazil
| | - Cláudio A Marroni
- Posgraduate Program in Hepatology, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050-170, Brazil
| | - Norma P Marroni
- Medical Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Brazil
- Biological Sciences Program, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, Brazil
| |
Collapse
|
2
|
Viana TFC, Campelo APS, Baldani JI, Fernandes-Júnior PI, Baldani VLD, Silva WM, Paggi GM, Brasil MS. Cultivable bacterial diversity associated with bromeliad roots from ironstone outcrops in central Brazil. BRAZ J BIOL 2020; 80:872-880. [PMID: 31967279 DOI: 10.1590/1519-6984.224982] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 11/05/2019] [Indexed: 12/17/2022] Open
Abstract
Studies on the bacterial diversity associated with wild plants are rare, especially on those that grow in association with bromeliads. In the present study, we isolated and identified epiphytic and endophytic bacteria from the roots of the bromeliads Dyckia excelsa, Dyckia leptostachya and Deuterocohnia meziana occurring in the "cangas" in the Pantanal from Mato Grosso do Sul State, Brazil. The epiphytic bacteria were isolated from washed roots, while the endophytic bacteria were isolated from surface disinfested roots. Bacterial representatives corresponding to each BOX-PCR fingerprint, as well as those that did not result in amplicons, were selected for 16S rDNA gene sequence analysis. The BOX-PCR data showed intrageneric and intraspecific diversity and could discriminate strains and identify their phenotypic characteristics. The 16S rDNA gene sequence and phylogeny analysis showed a higher occurrence of strains belonging to the genus Bacillus than Mycobacterium and Brevibacterium, which were found in lower numbers. Species from the Bacillus genus are well known for their sporulation capacity and longer survival in arid locations, such as the "cangas". This study clearly showed that the bromeliad species represent a vast reservoir of bacterial community diversity, and the cultivable strains represent a new source for biotechnological prospecting.
Collapse
Affiliation(s)
- T F C Viana
- Programa de Pós-graduação em Biologia Vegetal, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul - UFMS, Av. Costa e Silva, s/n, Bairro Universitário, CEP 79070-900, Campo Grande, MS, Brasil.,Ciências Biológicas, Laboratório de Microbiologia, Universidade Federal de Mato Grosso do Sul - UFMS, do Pantanal, Av. Rio Branco, 1.270, Bairro Universitário, CEP 79304-902, Corumbá, MS, Brasil
| | - A P S Campelo
- Programa de Pós-graduação em Biologia Vegetal, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul - UFMS, Av. Costa e Silva, s/n, Bairro Universitário, CEP 79070-900, Campo Grande, MS, Brasil.,Ciências Biológicas, Laboratório de Microbiologia, Universidade Federal de Mato Grosso do Sul - UFMS, do Pantanal, Av. Rio Branco, 1.270, Bairro Universitário, CEP 79304-902, Corumbá, MS, Brasil
| | - J I Baldani
- Embrapa Agrobiologia, Rodovia, BR-465, Km 7 (antiga Rodovia Rio/São Paulo), Bairro Ecologia, CEP 23891-000, Seropédica, RJ, Brasil
| | | | - V L D Baldani
- Embrapa Agrobiologia, Rodovia, BR-465, Km 7 (antiga Rodovia Rio/São Paulo), Bairro Ecologia, CEP 23891-000, Seropédica, RJ, Brasil
| | - W M Silva
- Ciências Biológicas, Laboratório de Ecologia, do Pantanal, Universidade Federal de Mato Grosso do Sul - UFMS, Av. Rio Branco, 1.270, Bairro Universitário, CEP 79304-902, Corumbá, MS, Brasil
| | - G M Paggi
- Programa de Pós-graduação em Biologia Vegetal, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul - UFMS, Av. Costa e Silva, s/n, Bairro Universitário, CEP 79070-900, Campo Grande, MS, Brasil.,Ciências Biológicas, Laboratório de Microbiologia, Universidade Federal de Mato Grosso do Sul - UFMS, do Pantanal, Av. Rio Branco, 1.270, Bairro Universitário, CEP 79304-902, Corumbá, MS, Brasil.,Ciências Biológicas, Laboratório de Genética, do Pantanal, Universidade Federal de Mato Grosso do Sul - UFMS, Av. Rio Branco, 1.270, Bairro Universitário, CEP 79304-902, Corumbá, MS, Brasil
| | - M S Brasil
- Ciências Biológicas, Laboratório de Microbiologia, Universidade Federal de Mato Grosso do Sul - UFMS, do Pantanal, Av. Rio Branco, 1.270, Bairro Universitário, CEP 79304-902, Corumbá, MS, Brasil.,Ciências Biológicas, Laboratório de Genética, do Pantanal, Universidade Federal de Mato Grosso do Sul - UFMS, Av. Rio Branco, 1.270, Bairro Universitário, CEP 79304-902, Corumbá, MS, Brasil
| |
Collapse
|
3
|
Costa FM, Schiavo JA, Brasil MS, Leite J, Xavier GR, Fernandes PI. Phenotypic and molecular fingerprinting of fast growing rhizobia of field-grown pigeonpea from the eastern edge of the Brazilian Pantanal. Genet Mol Res 2014; 13:469-82. [PMID: 24535875 DOI: 10.4238/2014.january.21.16] [Citation(s) in RCA: 4] [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] [Indexed: 11/03/2022]
Abstract
The aim of this study was to evaluate the diversity of rhizobial isolates obtained from root nodules of pigeonpea plants grown at the eastern edge of the Brazilian Pantanal. The bacterial isolates were isolated from root nodules from field-growing pigeonpea grown in two rural settlements of the Aquidauana municipality. The bacterial isolates were characterized phenotypically by means of cultural characterization, intrinsic antibiotic resistance (IAR), salt and high incubation temperature tolerance, and amylolytic and cellulolytic activities. The molecular characterization of the bacterial isolates was carried out using amplified ribosomal DNA restriction analysis (ARDRA) and Box-polymerase chain reaction (PCR) techniques. In addition, the symbiotic performance of selected rhizobial isolates was evaluated in a greenhouse experiment using sterile substrate. The phenotypic characterization revealed that the bacterial strains obtained from pigeonpea root nodules presented characteristics that are uncommon among rhizobial isolates, indicating the presence of new species nodulating the pigeonpea plants in the Brazilian Pantanal. The molecular fingerprinting of these bacterial isolates also showed a highly diverse collection, with both techniques revealing less than 25% similarity among bacterial isolates. The evaluation of symbiotic performance also indicated the presence of microorganisms with high potential to increase the growth and nitrogen content at the shoots of pigeonpea plants. The results obtained in this study indicate the presence of a highly diversified rhizobial community nodulating the pigeonpea at the eastern edge of the Brazilian Pantanal.
Collapse
Affiliation(s)
- F M Costa
- Laboratório de Matéria Orgânica e Microbiologia do Solo, Departamento de Solos, Universidade Estadual do Mato Grosso do Sul, Aquidauana, MS, Brasil
| | - J A Schiavo
- Laboratório de Matéria Orgânica e Microbiologia do Solo, Departamento de Solos, Universidade Estadual do Mato Grosso do Sul, Aquidauana, MS, Brasil
| | - M S Brasil
- Laboratório de Biologia Molecular e de Micro-Organismos, Departamento de Ciências do Ambiente, Universidade Federal do Mato Grosso do Sul, Corumbá, MS, Brasil
| | - J Leite
- Curso de Pós-Graduação em Agronomia-Ciência do Solo, Departamento de Solos, Instituto de Agronomia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brasil
| | - G R Xavier
- Laboratório de Ecologia Microbiana, Embrapa Agrobiologia, Seropédica, RJ, Brasil
| | - P I Fernandes
- Laboratório de Microbiologia do Solo, Embrapa Semiárido, Petrolina, PE, Brasil
| |
Collapse
|