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Pathophysiologic aspects of sepsis ín Piaractus mesopotamicus induced Aeromonas hydrophila

Grant number: 11/20280-2
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): January 01, 2012
Effective date (End): June 30, 2015
Field of knowledge:Agronomical Sciences - Veterinary Medicine - Animal Pathology
Principal Investigator:Flávio Ruas de Moraes
Grantee:Gustavo da Silva Claudiano
Home Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Sepsis is defined as systemic inflammatory response syndrome that occurs during infection. Although it is a major cause of mortality in fish, no shortage of literature on the pathophysiology of sepsis in teleosts. Thus, this study aims to assess and characterize the pathophysiological and histological changes of sepsis, identifying and quantifying gene expression of tumor necrosis factor ± and interleukin 1 in sepsis induced by Aeromonas hydrophila in pacu, and acute inflammation in the bladder under the influence of sepsis. For this, 260 will be used pacu, Piaractus mesopotamicus, with average weight of 150.71 ± 26.73 g and mean total length of 15.27 ± 1.60 cm. Initially it will be done to standardize the inoculum by determination of bacterial concentration lethal to 50.0% of the fish (LC50). Sepsis is induced by administration of the inoculum intracelomática corresponding to LC50 of A. hydrophila. The animals will be divided into two groups, one will receive 0.5 ml of NaCl solution (control group) and another group received the same volume containing the inoculum (challenge group) in a completely randomized design. Previously, half, one and two hours after inoculation the blood profile will be characterized, biochemical and coagulation of the host. For the characterization of histopathological changes, fragments of liver, spleen, kidney, heart and gills will be collected at the end of the age six, 12, 24 and 48 hours after induction of sepsis. The determination of gene expression of tumor necrosis factor (TNF-±) and interleukin 1 (IL-1) will occur 24 hours after induction of sepsis, the method reverse transcription-polymerase chain reaction (PCR) in real time. Immediately after induction of sepsis will be injected into the bladder with the inflammatory stimulus thioglycolate to 6% in saline 0.65% and after six, 12, 24 and 48 hours after stimulation, the exudate will be collected for the total count and differential cells accumulated in the bladder. Bacteria will be quantified in the blood in the exudate. Throughout the experiment the animals will be evaluated for clinical changes and the mortality rate will be assessed during the infection period for a maximum period of 10 days of observation. The results will be compared using analysis of variance (ANOVA) at 5% probability and the difference between the averages will be compared by Tukey test.

Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CLAUDIANO, GUSTAVO S.; ANDRADE, SONIA C. S.; SOUZA, ELAINE C.; YUNIS-AGUINAGA, JEFFERSON; COUTINHO, LUIZ L.; MOREIRA, DEBORA K. T.; GONCALVES, FELIPE C.; MUNDIM, ANTONIO V.; MARZOCCHI-MACHADO, CLENI M.; DE MORAES, FLAVIO R.; MORAES, JULIETA R. E. Role of neuroendocrine modulation and biochemistry in the sepsis in Piaractus mesopotamicus. General and Comparative Endocrinology, v. 288, MAR 1 2020. Web of Science Citations: 1.
MARINHO-NETO, FAUSTO A.; CLAUDIANO, GUSTAVO S.; YUNIS-AGUINAGA, JEFFERSON; CUEVA-QUIROZ, VICTOR A.; KOBASHIGAWA, KARINA K.; CRUZ, NATHAN R. N.; MORAES, FLAVIO R.; MORAES, JULIETA R. E. Morphological, microbiological and ultrastructural aspects of sepsis by Aeromonas hydrophila in Piaractus mesopotamicus. PLoS One, v. 14, n. 9 SEP 20 2019. Web of Science Citations: 4.
CLAUDIANO, GUSTAVO S.; YUNIS-AGUINAGA, JEFFERSON; MARINHO-NETO, FAUSTO A.; MIRANDA, RENATA L.; MARTINS, ISABELA M.; OTANI, FABRIZIA S.; MUNDIM, V, ANTONIO; MARZOCCHI-MACHADO, CLENI M.; MORAES, JULIETA R. E.; DE MORAES, FLAVIO RUAS. Hematological and immune changes in Piaractus mesopotamicus in the sepsis induced by Aeromonas hydrophila. FISH & SHELLFISH IMMUNOLOGY, v. 88, p. 259-265, MAY 2019. Web of Science Citations: 3.
ENGRACIA FILHO, J. R.; SHIMADA, M. T.; YUNIS-AGUINAGA, J.; RAMOS-ESPINOZA, F. C.; MORAES, F. R.; MORAES, J. R. E. Deformities in reared cobia, Rachycentron canadum L. and grouper, Epinephelus marginatus, in Sao Paulo state coast, Brazil: case report. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, v. 70, n. 5, p. 1565-1568, SEP-OCT 2018. Web of Science Citations: 0.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
CLAUDIANO, Gustavo da Silva. Aspectos da fisiopatologia da sepse em Piaractus mesopotamicus induzida por Aeromonas hydrophila. 2015. Doctoral Thesis - Universidade Estadual Paulista "Júlio de Mesquita Filho" Faculdade de Ciências Agrárias e Veterinárias..

Please report errors in scientific publications list by writing to: cdi@fapesp.br.