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Hepatic damage in newborns from female rats exposed to the pesticide derivative ethylenethiourea / Lesões hepáticas em recém-nascidos de ratas expostas ao derivado de agrotóxico etilenotioureia
Lemos, Patrícia Veruska Ribeiro Barbosa; Martins, José Luiz; Lemos, Sidney Pereira Pinto; Santos, Fernando Leandro dos; Silva, Sílvio Romero Gonçalves e.
  • Lemos, Patrícia Veruska Ribeiro Barbosa; Sao Francisco Valley Federal University. Department of Medicine. BR
  • Martins, José Luiz; UNIFESP. Department of Surgery. Sao Paulo. BR
  • Lemos, Sidney Pereira Pinto; UNIVASF. Department of Medicine. BR
  • Santos, Fernando Leandro dos; Federal Rural University. Department of Veterinary Medicine. Pernambuco. BR
  • Silva, Sílvio Romero Gonçalves e; Sao Francisco Valley Federal University. Department of Medicine. BR
Acta cir. bras ; 27(12): 897-904, dez. 2012. ilus, graf, tab
Article in English | LILACS | ID: lil-657975
ABSTRACT

PURPOSE:

To evaluate hepatic morphological-histological abnormalities in newborns from female rats exposed to ethylenethiourea.

METHODS:

A randomized study was conducted on fifty-five newborn Wistar rats were studied 34 in the experimental group, whose mothers had been exposed to 1% ethylenethiourea; and 21 in the control group, whose mothers had received 0.9% physiological solution. The solution was administered via gavage on the 11th day of gestation. Cesarean section was performed on the 20th day of gestation. The newborns' livers were examined and any morphological-histological abnormalities were registered. The presence of megakaryocytes was quantified in 50 microscope fields, as the total number of these cells per mm².

RESULTS:

The entire experimental group presented abnormalities of embryonic formation, with musculoskeletal anomalies, digestive system anomalies, hepatic congestion and friability, hydrops and delayed intrauterine growth. The histopathological analysis showed that morphological-histological hepatic destructuring had occurred in all entire experimental with removal of the hepatic trabeculae and severe hepatic megakaryocytosis. The mean megakaryocyte density ranged from 107.9 to 114.2 per mm², and it was eight times greater than in the control group, thus characterizing a situation of extramedullary hematopoiesis.

CONCLUSION:

The fetal exposure to ethylenethiourea caused hepatic damage characterized by severe extramedullary hematopoiesis.
RESUMO

OBJETIVO:

Avaliar alterações hepáticas morfohistológicas em recém-nascidos de ratas prenhes expostas à etilenotioureia.

MÉTODOS:

Realizado ensaio randomizado em animais de experimentação, onde foram estudados 55 recém-nascidos de ratas Wistar, 34 do Grupo Experimento, expostas a etilenotioureia 1% e 21 do Grupo Controle, em que a rata prenhe recebeu solução fisiológica 0,9%, ambos por gavagem no 11º dia de gestação. Realizada no 20º dia de gestação cesariana, analisados os fígados dos recém-nascidos e registradas as alterações morfohistológicas. Realizou-se a quantificação dos megacariócitos em 50 campos microscópicos, avaliando a quantidade total destas células por mm².

RESULTADOS:

Todos os recém-nascidos do Grupo Experimento apresentaram alterações na formação embrionária, com anomalias musculoesqueléticas, anormalidades do sistema digestório, congestão e friabilidade hepática, hidropisia e crescimento intrauterino retardado. A análise histopatológica mostrou desestruturação hepática morfohistológica em todos os recém-nascidos expostos à etilenotioureia, com destrabeculação dos hepatócitos e intensa megacariocitose hepática, apresentando média da densidade de megacariócitos de 107,9 até 114,2 por mm² sendo cerca de oito vezes maior que no Grupo Controle, caracterizando hematopoese extramedular.

CONCLUSÃO:

A exposição fetal a etilenotioureia provocou danos hepáticos caracterizados pela intensa hematopoese extramedular.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Pesticides / Prenatal Exposure Delayed Effects / Ethylenethiourea / Chemical and Drug Induced Liver Injury Type of study: Etiology study Limits: Animals / Pregnancy Language: English Journal: Acta cir. bras Journal subject: General Surgery / Procedimentos Cir£rgicos Operat¢rios Year: 2012 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal Rural University/BR / Sao Francisco Valley Federal University/BR / UNIFESP/BR / UNIVASF/BR

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Full text: Available Index: LILACS (Americas) Main subject: Pesticides / Prenatal Exposure Delayed Effects / Ethylenethiourea / Chemical and Drug Induced Liver Injury Type of study: Etiology study Limits: Animals / Pregnancy Language: English Journal: Acta cir. bras Journal subject: General Surgery / Procedimentos Cir£rgicos Operat¢rios Year: 2012 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal Rural University/BR / Sao Francisco Valley Federal University/BR / UNIFESP/BR / UNIVASF/BR