RESUMEN
Purpose: To investigate the role of peptidyl-prolyl cis/trans isomerase 1 (Pin1) on renal ischemia-reperfusion (I/R) injury and underlying mechanism. Methods: By establishing the in vitro and in vivo models of renal I/R, the role of Pin1 was explored by using molecular assays. Results: In renal I/R, endogenous Pin1 level was up-regulated in I/R-impaired kidney. Suppression of Pin1 with juglone afforded protection against I/R-mediated kidney dysfunction, and reduced I/R-induced endoplasmic reticulum (ER) stress in vivo. Consistent with the in vivo results, repression of Pin1 with juglone or gene knockdown with si-Pin1 conferred cytoprotection and restricted hypoxia/reoxygenation (H/R)-driven ER stress in HK-2 cells. Simultaneously, further study uncovered that Nrf-2/HO-1 signals was the association between Pin1 and ER stress in response to renal I/R. In addition, Nrf-2/HO-1 signal pathway was inactivated after kidney exposed to I/R, as indicated by the down-regulation of Nrf-2/HO-1 levels. Furthermore, inhibition of Pin1 remarkably rescued the inactivation ofNrf-2/HO-1. Conclusions: Pin1 modulated I/R-mediated kidney injury in ER stress manner dependent on Nrf2-HO-1 pathway in I/R injury.
Asunto(s)
Animales , Masculino , Ratas , Hemo-Oxigenasa 1 , Factor 2 Relacionado con NF-E2/análisis , Peptidilprolil Isomerasa de Interacción con NIMA/análisis , Isquemia/veterinaria , Reperfusión/veterinaria , Ratas Sprague-Dawley , Estrés del Retículo EndoplásmicoRESUMEN
Fifteen New Zealand adult rabbits were randomly allocated into three groups: Sham-operated (group A), Ischemia and Reperfusion (group B) and Carolina Rinse Solution (CRS) (group C). Groups B and C were subjected to one hour of ischemia and two hours of reperfusion. In group C, ten minutes before reperfusion, the bowel lumen was filled with CRS, and the segment immersed in CRS. Necrosis and loss of integrity of the villi were visible in groups B and C. Edema of the submucosa and circular muscle was observed in all groups. Hemorrhage was observed in different layers for groups B and C, but group C showed more severe hemorrhage in different layers during reperfusion. All groups showed polymorphonuclear leukocyte infiltration on the base of the mucosa, submucosa, and longitudinal muscle, in addition to polymorphonuclear leukocytes margination in the mucosal and submucosal vessels. Necrosis of enterocytes, muscles, crypts of Lieberkühn and myenteric plexus was observed in groups B and C during reperfusion. Topical and intraluminal Carolina Rinse Solution did not attenuate the effects of ischemia and reperfusion in the small intestine of rabbits.(AU)
Quinze coelhos da raça Nova Zelândia foram alocados em três grupos: instrumentado (grupo A), isquemia e reperfusão (grupo B) e solução de Carolina rinse (CRS) (grupo C). Os grupos B e C foram submetidos a uma hora de isquemia e a duas horas de reperfusão. No grupo C, 10 minutos antes da reperfusão, o segmento isolado foi imerso e teve seu lúmen preenchido com CRS. Os grupos B e C apresentaram necrose e perda progressiva da integridade das vilosidades. Foi observado edema na submucosa e na camada muscular circular em todos os grupos. Nos grupos B e C, foi observada hemorragia em diferentes camadas, mas, no grupo C, a hemorragia foi mais intensa durante a reperfusão. Todos os grupos apresentaram infiltrado de PMN na base da mucosa, na submucosa e na camada muscular longitudinal e marginação de PMN nos vasos da mucosa e da submucosa. Durante a reperfusão, foi observada necrose dos enterócitos, das camadas musculares, das criptas de Lieberkühn e do plexo mioentérico nos grupos B e C. O uso tópico e intraluminal de CRS não atenuou os efeitos da isquemia e da reperfusão no intestino delgado de coelhos.(AU)
Asunto(s)
Animales , Conejos , Reperfusión/veterinaria , Alopurinol/administración & dosificación , Deferoxamina/administración & dosificación , Glutatión/administración & dosificación , Isquemia/veterinaria , Yeyuno/cirugíaRESUMEN
A lo largo de las últimas décadas, el número de trasplantes pulmonares realizados como terapia final de muchas enfermedades respiratorias ha ido creciendo considerablemente, tanto en la población adulta como a nivel pediátrico. Sin embargo, se hace muy necesario estudiar las causas por las que su supervivencia es relativamente baja en comparación con otros trasplantes de órganos. Por ello, desde mediados del siglo pasado comenzaron a realizarse trasplantes pulmonares experimentales, cuya técnica ha ido mejorando, y se ha ampliado a distintas especies animales hasta llegar a los roedores. La ventaja que presentan estas especies pequeñas ha facilitado que el modelo quirúrgico se haya extendido y estandarizado, permitiendo estudiar diferentes aspectos relacionados con las enfermedades respiratorias. En esta revisión se analizan las distintas modalidades técnicas disponibles de trasplante experimental en rata y ratón, destacando tanto la técnica quirúrgica como la anestésica o la monitorización, así como las principales aportaciones generadas por el trasplante pulmonar murino
In recent years, the number of lung transplantations performed as the last option for many respiratory diseases has grown considerably, both in adults and children. However, the causes for the relatively short survival of lungs compared to other organ transplants still need to be studied. Techniques have improved since the 1950s when experimental lung transplantation began, and the different animal species used now include rodents. The advantage of using these small species is that the surgical model has been expanded and standardized, and different respiratory problems can be studied. In this review we examine the different technical strategies used in experimental transplantation in rats and mice, focusing on surgical techniques and anesthesia and monitoring methods, and highlighting the major contributions of mouse lung transplantation to the field
Asunto(s)
Animales , Ratones , Ratas , Trasplante de Pulmón , Trasplante de Pulmón/veterinaria , Modelos Animales , Supervivencia Tisular/fisiología , Anestesia , Reperfusión/veterinaria , Lavado Broncoalveolar/métodos , Experimentación Animal , Procedimientos Quirúrgicos Pulmonares/instrumentación , Procedimientos Quirúrgicos Pulmonares/tendencias , Procedimientos Quirúrgicos Pulmonares/veterinaria , Atelectasia Pulmonar/prevención & control , Periodo Perioperatorio , Cuidados Posoperatorios/veterinariaRESUMEN
Avaliaram-se as alterações do proteinograma sérico de eqüinos submetidos à isquemia e reperfusão do cólon menor por distensão intraluminal. Foram utilizados 10 animais submetidos à laparotomia pelo flanco, em posição quadrupedal, para a indução de obstrução no cólon menor durante um período de quatro horas. Cinco animais foram instrumentados, mas sem distensão (grupo controle - G1). Em cinco outros animais, foi realizada isquemia mural por distensão do cólon menor via manguito inflado com 40mmHg (grupo distendido - G2). Foram colhidas amostras de sangue antes da intervenção cirúrgica (M1), com 4 horas da colocação do manguito (M2) e com 3 horas (M3) e 12 horas (M4) de reperfusão. Após centrifugação e fracionamento das amostras, as proteínas de fase aguda foram separadas por eletroforese em gel de poliacrilamida contendo SDS-PAGE, e suas concentrações determinadas por densitometria computadorizada. Foram encontradas 19 proteínas no fracionamento eletroforético, com peso molecular variando de 185.000 a 14.000 Daltons (Da). Os pesos moleculares encontrados, correspondentes às proteínas mais conhecidas, foram ceruloplasmina, 130.000 Da; proteína C-reativa, 122.000 Da; transferrina, 85.000 Da; α1-antitripsina, 61.000 Da; haptoglobina, 47.000 Da; e glicoproteína ácida, 40.000 Da. Os resultados mostram que proteínas de fase aguda se alteram após o trauma cirúrgico.
The changes in the serum proteinogram of equines submitted to ischemia and reperfusion of small colon by intraluminal distension were evaluated. Ten horses were submitted to standing laparotomy to induce a small colon obstruction for four hours. Five animals were instrumented without distention (control group - G1). In another five animals, mural ischemia was promoted placing a latex balloon distended with 40mmHg into the small colon (distended group - G2). Blood samples were collected before the surgical procedures (M1) and 4h after the balloon placement (M2) and 3h (M3) and 12h (M4) after reperfusion. After centrifugation and fractioning of the samples, the acute phase proteins were separated by SDS-PAGE and their concentrations were determined by computer densitometry. Nineteen proteins were separated by eletrophoresis and the molecular weights ranged from 185,000 to 14,000 Dalton (Da). The found molecular weights, related to the most known proteins, were: ceruloplasmin, 130,000 Da; C-reactive protein, 122,000 Da; transferrin, 85,000 Da; α1-antitripsin, 61,000 Da; haptoglobin, 47,000 Da; and acid glycoprotein, 40,000 Da. The results showed that acute phase proteins changed after surgical injury.