Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 10 de 10
Filter
1.
Rev. bras. ginecol. obstet ; 40(11): 705-712, Nov. 2018. tab, graf
Article in English | LILACS | ID: biblio-977792

ABSTRACT

Abstract Objective To characterize the patterns of cell differentiation, proliferation, and tissue invasion in eutopic and ectopic endometrium of rabbits with induced endometriotic lesions via a well- known experimental model, 4 and 8 weeks after the endometrial implantation procedure. Methods Twenty-nine female New Zealand rabbits underwent laparotomy for endometriosis induction through the resection of one uterine horn, isolation of the endometrium, and fixation of tissue segment to the pelvic peritoneum. Two groups of animals (one with 14 animals, and the other with15) were sacrificed 4 and 8 weeks after endometriosis induction. The lesion was excised along with the opposite uterine horn for endometrial gland and stroma determination. Immunohistochemical reactions were performed in eutopic and ectopic endometrial tissues for analysis of the following markers: metalloprotease (MMP-9) and tissue inhibitor of metalloprotease (TIMP-2), which are involved in the invasive capacity of the endometrial tissue; and metallothionein (MT) and p63, which are involved in cell differentiation and proliferation. Results The intensity of the immunostaining for MMP9, TIMP-2, MT, and p63 was higher in ectopic endometria than in eutopic endometria. However, when the ectopic lesions were compared at 4 and 8 weeks, no significant difference was observed, with the exception of the marker p63, which was more evident after 8 weeks of evolution of the ectopic endometrial tissue. Conclusion Ectopic endometrial lesions seem to express greater power for cell differentiation and tissue invasion, compared with eutopic endometria, demonstrating a potentially invasive, progressive, and heterogeneous presentation of endometriosis.


Resumo Objetivo Caracterizar o padrão de diferenciação celular, proliferação e invasão tecidual em endométrio eutópico e ectópico de coelhas com lesões de endometriose induzidas por um modelo experimental 4 e 8 semanas após o procedimento de implantação endometrial. Métodos Vinte e nove coelhas fêmeas Nova Zelândia foram submetidas a laparotomia para indução de endometriose através da ressecção de um dos cornos uterinos, isolamento do endométrio e fixação do tecido no peritônio pélvico. Dois grupos de animais (14 animais em um grupo e 15 animais no outro) foram sacrificados 4 e 8 semanas após a indução da endometriose. A lesão foi excisada junto com o corno uterino contralateral para determinação da presença de glândulas e de estroma endometrial. Reações de imunohistoquímica foram realizadas no tecido endometrial eutópico e ectópico para análise dos seguintes marcadores: metaloprotease (MMP9) e inibidor tecidual da metaloprotease 2 (TIMP-2), os quais estão envolvidos na capacidade de invasão do tecido endometrial; e metalotioneina (MT) e p63, os quais estão envolvidos na diferenciação e proliferação celular. Resultados A intensidade da imunomarcação para MMP9, TIMP-2, MT e p63 foi mais alta nos endométrios ectópicos do que nos endométrios eutópicos. Contudo, quando as lesões foram comparadas entre 4 e 8 semanas, nenhuma diferença foi observada, com exceção do marcador p63, o qual foi mais evidente depois de 8 semanas de evolução do tecido endometrial ectópico. Conclusão Lesões endometriais ectópicas parecem expressar maior poder de diferenciação celular e de invasão tecidual comparadas com endométrios eutópicos, demonstrando o potencial de invasão, de progressão e de apresentação heterogênea da endometriose.


Subject(s)
Animals , Female , Choristoma/metabolism , Tissue Inhibitor of Metalloproteinase-2/biosynthesis , Matrix Metalloproteinase 9/biosynthesis , Endometriosis/metabolism , Endometrium/metabolism , Membrane Proteins/biosynthesis , Metallothionein/biosynthesis , Rabbits , Cell Differentiation , Choristoma/pathology , Tissue Inhibitor of Metalloproteinase-2/analysis , Matrix Metalloproteinase 9/analysis , Cell Proliferation , Disease Models, Animal , Endometriosis/pathology , Endometrium/pathology , Endometrium/chemistry , Membrane Proteins/analysis , Metallothionein/analysis
2.
Rev. bras. enferm ; 67(5): 700-707, Sep-Oct/2014. tab, graf
Article in Portuguese | LILACS, BDENF | ID: lil-731203

ABSTRACT

O artigo descreve a construção de um questionário para avaliação da qualidade do atendimento de um Time de Resposta Rápida, em Hospital Universitário de Londrina-PR, fundamentado no modelo conceitual de Donabedian (estrutura-processoresultado). A coleta de dados ocorreu no mês de março de 2012 e o processo de adequação do questionário foi desenvolvido com a aplicação da Técnica Delphi com a participação de 15 especialistas. Ao término do estudo obteve-se um questionário com 37 enunciados, sendo alcançado índice de concordância final na pesquisa com valores superiores a 80% para todos os conceitos. Espera-se que as contribuições do grupo de especialistas tornem o instrumento confiável e seja aplicado em outros serviços semelhantes. Aplicações futuras deste instrumento poderão trazer subsídios para melhor avaliação da qualidade dos serviços de equipes de Resposta Rápida.


The paper describes the construction of a questionnaire to assess the quality of care of a Rapid Response Team at the University Hospital of Londrina, based on the conceptual model of Donabedian (structure-process-outcome). Data collection occurred in March 2012 and the process of adjusting the questionnaire was developed with the application of the Delphi technique involving 15 experts. At the end of the study the questionnaire contained 37 statements, achieving final compliance level higher than 80% in all concepts. It is hoped that the contributions of the expert group produce a more reliable questionnaire to be applied in other similar services. Future applications of this instrument may provide information to better assess the quality of teams of Rapid Response services.


El artículo describe la construcción de un cuestionario para la evaluación de la calidad de la atención de un Equipo de Respuesta Rápida en un Hospital Universitario de Londrina, Paraná, basado en el modelo conceptual de Donabedian (estructura-procesoresultado). La recolección de datos ocurrió durante el mes de marzo de 2012 y el proceso de ajuste del cuestionario fue desarrollado por medio de la Técnica Delphi con la participación de 15 especialistas. Al término del estudio se obtuvo un cuestionario con 37 enunciados, alcanzándose un índice de concordancia final en la investigación con valores superiores al 80% para todos los conceptos. Se espera que las contribuciones del grupo de especialistas afiancen la confiabilidad del instrumento y que el cuestionario sea utilizado en otros servicios semejantes. Las aplicaciones futuras podrán traer subsidios para evaluar mejor la calidad de los servicios de los equipos de Respuesta Rápida.


Subject(s)
Humans , Animals , Male , Rats , Alcoholic Beverages/toxicity , Hepatocytes/drug effects , Metallothionein/biosynthesis , Cell Division/drug effects , Collagen/biosynthesis , Hepatocytes/metabolism , Hepatocytes/pathology , Liver Cirrhosis, Alcoholic/etiology , Liver Cirrhosis, Alcoholic/prevention & control , Rats, Sprague-Dawley
3.
Journal of Huazhong University of Science and Technology (Medical Sciences) ; (6): 448-50, 2007.
Article in English | WPRIM | ID: wpr-634876

ABSTRACT

To investigate the effects of metallothionein (MT) on isolated rat heart, 16 Wistar rats were randomly divided into 2 groups. In control group (group C), distilled water was injected intraperitoneally and 24 h later isolated hearts were perfused with Langendorff and stored at 4 degrees C for 3 h with histidine-tryptophan-ketoglutarate (HTK) solutions, and then isolated hearts were perfused for 2 h by Langendorff. In experimental group (group E), 3.6% ZnSO(4) was injected intraperitoneally, 24 h later isolated hearts were perfused by Langendorff and stored at 4 degrees C for 3 h with HTK solutions, and then the isolated hearts were perfused for 2 h with Langendorff. MT content, the recovery of hemodynamics, myocardial water content (MWC), lactate dehydrogenase (LDH) and creatine kinase (CK) leakage, adenosine triphosphate (ATP) and malondialdehyde (MDA) content, superoxide dismutase (SOD) activity, myocardial cell Ca(2+) content, Ca(2+)-ATPase activity of mitochondria ([Ca(2+)-ATPase](m)) and its Ca(2+) content ([Ca(2+)](m)), synthesizing ATP activity of mitochondria ([ATP](m)), and the ultrastructure of cells were examined. There were a significant increase in group E in hemodynamic recovery, ATP content, SOD activity, [Ca(2+)-ATPase](m) activity, [ATP](m) activity, and substantial reduction in MWC, LDH and CK leakage, MDA content, myocardial cell Ca(2+) content, [Ca(2+)](m) content, and the ultrastructural injury were obviously milder than that of group C. This study demonstrated that MT has protective effects on isolated rat heart.


Subject(s)
Cardiotonic Agents/pharmacology , Creatine Kinase/metabolism , L-Lactate Dehydrogenase/metabolism , Metallothionein/biosynthesis , Metallothionein/pharmacology , Myocardium/metabolism , Myocardium/ultrastructure , Random Allocation , Rats, Wistar , Superoxide Dismutase/metabolism , Zinc Sulfate/pharmacology
4.
Rio de Janeiro; s.n; 2006. 54 p. ilus, graf, tab.
Thesis in Portuguese | LILACS | ID: lil-496877

ABSTRACT

Metalotioneínas (MTs) são proteínas citosólicas cuja função biológica está relacionada à regulação de metais essenciais e a detoxificação de metais tóxicos. O conhecimento da compartimentalização intracelular de metais, da função fisiológica das MTs e dos fatores que controlam seus níveis em diferentes espécies de peixes é essencial para compreensão dos efeitos tóxicos induzidos por metais. Geophagus brasiliensis (acará) é uma espécie nativa do Brasil, com ampla distribuição e aspectos ecológicos que favorecem sua utilização como espécie bioindicadora dos efeitos da poluição ambiental por metais. Este trabalho teve por objetivo estudar MT e metais em acarás, analisando a influência dos parâmetros biológicos do animal, além das alterações produzidas pela exposição a um metal tóxico como cádmio (Cd). Acarás coletados no rio Guandu foram divididos em dois grupos. (...) Neste estudo foi verificado que MT e metais em acarás são influenciados por alguns parâmetros biológicos. A exposição ao Cd também promove uma alteração nos níveis de MT e de metais bem como na distribuição intracelular. Estes fatores estão relacionados com à toxicidade e a tolerância à exposição a metais e devem ser considerados para que esta espécie possa ser utilizada como bioindicadora da exposição ambiental a metais.


Subject(s)
Animals , Environmental Monitoring , Biomarkers/metabolism , Metals/toxicity , Metallothionein/biosynthesis , Fishes/metabolism , Water Pollution , Cadmium/toxicity , Copper/toxicity , Water Pollutants, Chemical/toxicity , Zinc/toxicity
5.
Indian J Exp Biol ; 2004 Mar; 42(3): 288-91
Article in English | IMSEAR | ID: sea-59162

ABSTRACT

Adrenalectomy resulted in an increase in metallothionein (MT) levels in testes, caput and cauda epididymis and prostate of rats but not in seminal vesicles where its levels decreased significantly. Inspite of administration of hydrocortisone, MT in testes, prostate (1.2 mg), caput (0.3 mg days 2, 8; 0.6 mg and 1.2 mg) and seminal vesicles (0.3 mg day 2, 4; 0.6 mg and 1.2 mg) remained increased. Thus adrenal insufficiency/hydrocortisone has no direct influence on MT levels. However, the increased levels of MT can be related to its ability to protect the cells from free radical damage caused by atrophy of reproductive tissues in adrenalectomised rats. Exogenously administered hydrocortisone to ADX rats resulted in return to ADX state as hydrocortisone metabolizes (half-life < 12 hr) and hence MT levels remained increased. The observations could provide a clue for the physiological functioning of the male reproductive tissue in a state of adrenal deprivation and hormonal supplementation.


Subject(s)
Adrenal Glands/physiology , Animals , Anti-Inflammatory Agents/pharmacology , Epididymis/metabolism , Free Radicals , Hydrocortisone/pharmacology , Male , Metallothionein/biosynthesis , Prostate/metabolism , Rats , Rats, Wistar , Seminal Vesicles/metabolism , Testis/metabolism
6.
Pakistan Journal of Medical Sciences. 2004; 20 (3): 219-223
in English | IMEMR | ID: emr-68091

ABSTRACT

To investigate the bio-effects of MF exposure on synthesis of plasma corticosterone and liver metallothionein [MT] concentrations in female rats Design: Female rats were exposed to 128 mT 1 hour/day for 10 consecutive days. Trunk blood of decapitated rats was collected and used for determination of corticosterone concentration. Quantification of MT was performed by using 109Cd. Whole liver were homogenized in 1 ml of a 0.25 M sucrose solution. Surgical Adrenalectomy [ADX] and sham-ADX were performed via dorsal approach under ether anesthesia. Setting: Female Wistar rats were housed in a cage, with free access to food and water [Faculte des Sciences de Bizerte, Tunisia]. Rats were cared for under the Tunisian Code of Practice for the Care and Use of Animals for Scientific purpose and the Experimental Protocols were approved by the Ethics Committee. Subjects: Treated and control groups [n=12] weighing 100-150g at the time of experiments were housed in the same condition three weeks before the beginning of the experiments. Main outcome measures: Counting radioactivity will be used as analysis marker of bio-effects of magnetic field. Sub-Acute exposure to magnetic field the exposition of rats 1 hour/day for 10 consecutive days to MF of 128 mT induced a significant increase [+104%, p<0.05] of plasma corticosterone concentrations showing a stress-state. Interestingly, MF induced an increase of metallothionein levels [+122%, p<0.05] in liver compared to controls. By contrast, levels of MT in adrenalectomised rats remained unchanged following MF exposure. Conclusions: The results presented above show, for the first time, that sub-acute exposure to MF stimulates plasma corticosterone and MT activities in female rats. Indeed, we have noted an apparent lack of MT response to MF exposure in adrenalectomized rats, indicating that probably biosynthesis of MT was induced by stress


Subject(s)
Female , Animals, Laboratory , Corticosterone/biosynthesis , Metallothionein/biosynthesis , Corticosterone/blood , Liver , Rats, Wistar , Adrenalectomy
7.
Rev. chil. anat ; 19(2): 183-190, 2001. ilus, tab
Article in Spanish | LILACS | ID: lil-301857

ABSTRACT

El estudio tuvo por objetivo investigar histométricamente los efectos tóxicos de la exposición al ión cadmio sobre la glándula submandibular en rata adulta. Ratas machos, de peso aproximado a 170 g recibieron, en el bebedero, una solución de 300 mg de cloruro de Cd/l de agua, durante 6 meses. Otro grupo de animales, después del tratamiento, permaneció en recuperación durante un período adicional de 6 meses. El parénquina de las glándulas submandibulares mostró marcada diferencia entre los animales tratados y controles. Los acinos de las glándulas de las ratas intoxicadas con Cd, eran menores, de forma irregular y con células degeneradas. Los núcleos variaron de tamaño pero no de forma. Los ductos estriados, granuloso y excretores estaban desorganizados, mostrando núcleos menores. El cuadro histológico de la glándula submandibular de las ratas sometidas, a recuperación de la intoxicación, durante 6 meses fue semejante al de los controles. Este resultado fue confirmado mediante el estudio histométrico. Basados en la literatura, los autores afirman que la metalotioneína actúa como agente desintoxicante uniéndose al Cd y que la disminución de su síntesis aumenta la concentración de Cd libre, provocando daños al ADN e inhibiendo la síntesis proteica, como fue observado en el presente trabajo


Subject(s)
Animals , Male , Rats , Cadmium , Submandibular Gland , Cadmium , Inactivation, Metabolic , Submandibular Gland/pathology , Metallothionein/biosynthesis , Metallothionein/pharmacology , Rats, Wistar
8.
J. bras. patol ; 34(1): 48-54, jan.-mar. 1998. ilus, tab
Article in Portuguese | LILACS | ID: lil-229642

ABSTRACT

As metalotioneínas (MTs) säo uma família de proteínas de baixo peso molecular, ricas em cisteína e com ligaçöes seletivas a metais pesados. A expressäo das MTs em tecido, detectada através de técnica imuno-histoquímica, tem se correlacionado com comportamento agressivo de alguns cânceres humanos, dentre eles o carcinoma invasivo da mama e o melanoma. Esta revisäo tem como objetivo introduzir entre os patologistas noçöes básicas sobre a biologia das MTs, apresentar as características de sua expressäo em tecidos humanos e sua relaçäo com o comportamento biológico de algumas neoplasias, principalmente o carcinoma de mama


Subject(s)
Humans , Immunoenzyme Techniques , Immunohistochemistry , Metallothionein/analysis , Metallothionein/biosynthesis , Metallothionein/metabolism , Neoplasms/metabolism
9.
Indian J Exp Biol ; 1992 Jul; 30(7): 597-601
Article in English | IMSEAR | ID: sea-61716

ABSTRACT

Administration of cadmium (2.5 mg/kg, sc on alternate days for 3 weeks) to male albino rats led to significant accumulation of cadmium and metallothionein in the liver and kidneys. The activity of glutathione peroxidase was significantly decreased whereas, the concentration of glutathione was increased in these organs. Glycine-l-14C incorporation studies showed enhanced synthesis of glutathione in kidney but not in the liver. Selenium supplementation (1 mg/kg/day orally) failed to prevent these cadmium-induced changes, although it resulted in very high accumulation of selenium in these organs indicating the formation of cadmium-selenium complex.


Subject(s)
Animals , Cadmium/pharmacology , Glutathione/biosynthesis , Glutathione Peroxidase/biosynthesis , Kidney/drug effects , Liver/drug effects , Male , Metallothionein/biosynthesis , Rats , Rats, Wistar , Selenium/pharmacology
10.
Indian J Exp Biol ; 1991 Jul; 29(7): 693-4
Article in English | IMSEAR | ID: sea-58687

ABSTRACT

Compared to non-metal toxicants (ammonia, 1.56 ppm; and phenol, 10 ppm), the metals (CdCl2, 30 ppm; HgCl2, 16.7 ppb; and ZnCl2, 6 ppm) significantly induced hepatic metallothionein (MT) concentrations in C. punctatus, exposed independently to non-lethal doses of these toxicants for 28 days. It is suggested that hepatic MT serves as a metal-sequestering protein and is involved in the detoxication of metals only and ensures protection from toxic chemicals in ambience.


Subject(s)
Animals , Chlorides/pharmacology , Fishes/metabolism , Gene Expression Regulation/drug effects , Hydroxides/pharmacology , Liver/metabolism , Mercuric Chloride/pharmacology , Metallothionein/biosynthesis , Phenol , Phenols/pharmacology , Stimulation, Chemical , Zinc/pharmacology , Zinc Compounds
SELECTION OF CITATIONS
SEARCH DETAIL