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Registros recuperados: 129
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A new methodology for the improvement of diagnostic immunohistochemistry in canine veterinary pathology: automated system using human monoclonal and polyclonal antibodies Arq. Bras. Med. Vet. Zootec.
Cassali,G.D.; Silva,P.; Rêma,A.; Gärtner,F.; Gobbi,H.; Tafuri,W.L.; Schmitt,F.C..
The authors describe their experience with an automated immunohistochemical system applied to canine tissue samples. Twenty human cellular markers specific monoclonal and polyclonal antibodies and two different antigen retrieval methods were used in normal and neoplastic breast tissue, as well as skin samples obtained from female dogs of pure and mixed breeds. The antibodies tested were the most frequently used in human and veterinary medicine studies, employed with diagnostic purposes in breast pathology, as well as in cancer research. Most of them may be used to study other normal and abnormal tissues and included cytokeratins, progesterone receptor, c-erbB2, p53, MIB-1, PCNA, EMA, vimentin, desmin, alpha-actin, S-100, pan-cadherin, and E-cadherin. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dog; Immunohistochemistry; Automated system; Mammary gland.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352001000300010
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A poor prognosis in human hepatocellular carcinoma is associated with low expression of DPP4 BJMBR
Yu,Hao; Mei,Xiao-Ping; Su,Peng-Fei; Jin,Guang-Zhi; Zhou,Hong-Kun.
This study aimed to explore the prognostic role of dipeptidyl peptidase 4 (DPP4) expression in hepatocellular carcinoma (HCC). DPP4 expression was measured in formalin-fixed paraffin-embedded specimens that were gathered from 327 HCC patients. Immunohistochemistry analyses were utilized to examine DPP4 expression characteristics and prognostic values (overall survival (OS) and time to recurrence) of DDP4 in HCC tissues. In addition, a patient-derived xenograft (PDX) model was used to assess the correlation between DPP4 expression and tumor growth in vivo. DPP4 was expressed in low levels in HCC tissues in contrast to paired peritumoral tissues (38 cases were down-regulated in a total of 59 cases, 64.4%. P=0.0202). DPP4 expression was significantly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dipeptidyl peptidase 4; Hepatocellular carcinoma; Immunohistochemistry; X-tile; Overall survival; Patient-derived xenograft.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000400609
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A retrospective study on the diagnosis of clostridial myonecrosis in ruminants in Brazil Ciência Rural
Pires,Prhiscylla Sadanã; Ecco,Roselene; Silva,Rodrigo Otávio Silveira; Araújo,Marina Rios de; Salvarani,Felipe Masiero; Heneine,Luíz Guilherme Dias; Oliveira Júnior,Carlos Augusto de; Lobato,Francisco Carlos Faria.
ABSTRACT: A standardized immunochemistry method for the diagnosis of clostridial myonecrosis was applied to 38 formalized tissue samples from ruminants with clinical and post mortem history suggestive of blackleg or gas gangrene. The diagnosis of clostridial myonecrosis was confirmed in 37 out of 38 (97.4%) samples tested. Clostridium chauvoei and Clostridium perfringens type A were the most common agents found alone, being detected in ten (26.3%) and six (15.8%) samples, respectively. The other cases showed an association of two or three clostridia, with C. perfringens type A detected in 11 (29%) cases. Based on the findings of the present study, polyvalent vaccines against clostridial infections of animals incorporating C. perfringens would be more...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gas gangrene; Blackleg; Malignant edema; Cattle; Sheep; Immunohistochemistry.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100452
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Abundant immunohistochemical expression of dopamine D2 receptor and p53 protein in meningiomas: follow-up, relation to gender, age, tumor grade, and recurrence BJMBR
Trott,G.; Pereira-Lima,J.F.S.; Leães,C.G.S.; Ferreira,N.P.; Barbosa-Coutinho,L.M.; Oliveira,M.C..
Meningiomas are common, usually benign tumors, with a high postoperative recurrence rate. However, the genesis and development of these tumors remain controversial. We aimed to investigate the presence and implications of a mutated p53 protein and dopamine D2 receptor in a representative series of meningiomas and to correlate these findings with age, gender, tumor grade, and recurrence. Tumor tissue samples of 157 patients diagnosed with meningioma (37 males and 120 females, mean age 53.6±14.3 years) who underwent surgical resection between 2003 and 2012 at our institution were immunohistochemically evaluated for the presence of p53 protein and dopamine D2 receptor and were followed-up to analyze tumor recurrence or regrowth. Tumors were classified as...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Receptors; Dopamine D2; Immunohistochemistry; Meningioma; Tumor suppressor protein p53; Recurrence.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000500415
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Administering ascorbic acid to rats undergoing ageing processes: effects on myosin-V immunoreactive myenteric neurons Anais da ABC (AABC)
Mello,Sônia A.; Marese,Angélica C.M.; Brancalhão,Rose M.C.; Zanoni,Jacqueline N.; Natali,Maria Raquel M..
During the ageing process the enteric nervous system undergoes morphofunctional changes, such as enteric neurodegeneration. Neuronal death can be attributed to increase radicals free, and ascorbic acid (AA), known antioxidant, could minimize damage cause by oxidative stress. The objective of this study is to analyse the behaviour of morphoquantative myenteric neurons in the duodenum of adult Wistar rats with aged 90 (C90), 345 (E345) and 428 (E428) days, as well as animals of the same age who received ascorbic acid supplementation for 120 days (EA345 and EA428). Whole-mount preparations of muscle layer from the duodenum of the animals were immunostained by the method myosin V. 80 microscopic fields were quantified (14.8 mm2/animal) and measured 100...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aging; Antioxidant; Enteric nervous system; Immunohistochemistry.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100337
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Analysis of EGFR and HER-2 expressions in ductal carcinomas in situ in canine mammary glands Arq. Bras. Med. Vet. Zootec.
Silva,I.L.D.; Dias,A.P.M.; Bertagnolli,A.C.; Cassali,G.D.; Ferreira,E..
Biomolecular evidence has shown that ductal carcinoma in situ(DCIS) may develop into invasive carcinoma of the canine mammary gland, and mutations in proto-oncogenes HER2 and EGFR; two members of the family of epidermal growth factor receptors, may be involved in this process. The purpose of this study was the characterization of the immunohistochemical expression of the EGFR and HER2 proteins in the process of neoplastic transformation, supposedly present in ductal carcinomas in situin canine mammary glands. Fifteen cases of DCIS were evaluated, with a higher expression of HER2 and EGFR being observed in low-grade carcinomas when compared with high-grade neoplasms, and with a high positive statistical correlation in the latter. Results suggest that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dog; Neoplasm; Immunohistochemistry; EGFR; CerbB2.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000300763
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Ancillary techniques on the evaluation of canine cutaneous mast cell tumors from Brazil Ciência Rural
Flores,Mariana Martins; Mazaro,Renata Dalcol; Langohr,Ingeborg Maria; Roy,Alma; Strother,Keith; Fighera,Rafael Almeida.
ABSTRACT: The use of histologic classification by a 2-tier grading system only, immunohistochemistry (IHC) for KIT and Ki-67 and polymerase chain reaction (PCR) for internal tandem duplications (ITD) on exon 11 has improved the prognostication of canine cutaneous mast cell tumors (CCMTs) particularly in the United States. However, these techniques are not commonly used in most Brazilian laboratories. Likewise, no studies, to date, have investigated the occurrence of ITD in CCMTs from the country. Thus, this study tested the 2-tier grading system, the immunohistochemistry for KIT and Ki-67 and the PCR for exon 11 in a group of Brazilian CCMTs with the goal of investigating the applicability of these tests in a Brazilian laboratory. Of the 39 CCMTs, 69.2%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Immunohistochemistry; Ki-67; Mutations; PCR; Mast cell tumor..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001804
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Androgen Receptor Distribution, PAS and Alcyan Blue Reaction in the Vomeronasal Organ and the Nasal Septum Mucosa of the Developing Male Rat International Journal of Morphology
Núñez Chichet,M E; Genovese,P; Bielli,A.
The vomeronasal organ (VNO) is a tubular chemoreceptory organ which detects environmental pheromones and is essential for mammalian normal reproductive activity. A sensitive chemoreceptory neuroepithelium lines the concave VNO wall and the opposite, convex wall is lined by a seudostratified, receptor-free epithelium. The secretion of the Jacobson glands (JG) -tubuloacinary glands lying in the lamina propia of the VNO - is essential for pheromones contacting vomeronasal organ chemoreceptors. Tubuloacinary glands lying in the connective tissue of the nasal septum mucosa (Bowman glands), can be classified as ventral and dorsal, according to their location. Positivity to PAS and Alcyan blue reactions and androgen receptor immunolocalization was evaluated with...
Tipo: Journal article Palavras-chave: Vomeronasal organ; Chemoreception; Development; Histochemistry; Immunohistochemistry.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000300018
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Annona crassiflora Mart. fruit pulp effects on biochemical parameters and rat colon carcinogenesis Ciência e Agrotecnologia
Venâncio,Vinícius Paula; Ferreira,Eric Batista; Brigagão,Maísa Ribeiro Pereira Lima; Paula,Fernanda Borges de Araújo; Barbisan,Luis Fernando; Azevedo,Luciana.
A. crassiflora Mart. a Brazilian savannah fruit, is a source of phytochemical compounds that possess a wide array of biological activities, including free radical scavenging. This native fruit proved to potentialize the mutagenic process in previous in vivo investigations. The aim of the present study was to investigate the effects of A. crassiflora Mart. pulp intake on colonic cell proliferation and on the development of Aberrant Crypt Foci (ACF) in male Wistar rats. The animals were fed with either a commercial diet or a diet supplemented with A. crassiflora Mart. pulp mixed in 1%, 10% or 20% (w/w) for 4 weeks or 20 weeks. The carcinogen 1,2-dimethylhydrazine dihydrochloride (4 doses, 40 mg kg-1 each) was used to induce colonic ACF. After euthanasia, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aberrant crypt foci; Brazilian savannah; Dimethylhydrazine; Immunohistochemistry; Oxidative stress.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000400008
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Antifibrotic effects of total or partial application of amniotic membrane in hepatic fibrosis Anais da ABC (AABC)
MAMEDE,KARINA M.; SANT’ANNA,LUCIANA B..
Abstract: Liver fibrosis is the final common pathway of chronic liver diseases, having cirrhosis as a possible progression, which has liver transplantation as the only effective treatment. Human amniotic membrane represents a potential strategy as a therapy for liver fibrosis, due to its anti-inflammatory, anti-fibrotic and immunomodulatory properties. The aim of this study was to evaluate amniotic membrane effects as a treatment for hepatic fibrosis induced in rats by bile duct ligation (BDL), verifying alterations between two different forms of amniotic membrane application, around all the lobes of the liver and around only one lobe of the liver. Two weeks after inducing fibrosis, an amniotic membrane fragment was applied to the surface of the liver,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amniotic membrane; Histopathology; Immunohistochemistry; Liver fibrosis; Myofibroblasts.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500702
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Anti-inflammatory Effect of Silymarin on Ovarian Immunohistochemical Localization of TNF- Associated with Systemic Inflammation in Polycystic Ovarian Syndrome International Journal of Morphology
Kayedpoor,Parvin; Mohamadi,Shima; Karimzadeh-Bardei,Latifeh; Nabiuni,Mohammad.
Tumor necrosis factor alpha (TNF-a) and interleukin (IL)-6, are prominent mediators of inflammation and have been confirmed to be elevated in at least a subgroup of women with polycystic ovary syndrome (PCOS). In this study, the effects of Silymarin (SLM) on the expression TNF-a, IL-6, CRP and symptoms of PCOS were studied. In this research, PCOS was induced by injection of Estradiol Valerate. PCOS rats were divided into control and experimental groups received intraperitoneal injection SLM extract daily. After syndrome induction, ovaries were collected for histological and immunohistochemical evaluations. Serum IL-6 was detected by the ELISA kit. The results indicated the significant reduction in inflammatory markers and significant changes follicular...
Tipo: Journal article Palavras-chave: Immunohistochemistry; Inflammation; Silybum Marianum extract.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000200054
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Anti-Sarcocystis neurona immunostaining associated with equine protozoal myeloencephalitis in Brazil Ciência Rural
Paixão,Tatiane Alves da; Rêgo,Isabela Oliveira de Paula; Santos,Renato de Lima.
A retrospective study (1942 to 2005) of histopathological lesions included samples of central nervous system (SNC) from 203 animals in the Equidae family. A total of 42.4% of these samples had significant pathological changes, which were classified as inflammatory (62.8%), degenerative (25.6%), circulatory (10.5%), and neoplasic (1.1%) lesions. Immunohistochemistry anti-Sarcocystis neurona antigens was performed in all the cases with inflammatory changes (54), of which one of the case of encephalitis resulted positive to immunostaining. Although evidence of EPM (Equine Protozoal Myeloencephalitis) has been previously reported in Brazil, to the best of our knowledge, this is the first report in which characteristic EPM lesion was associated with anti-S....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Equine; Sarcocystis neurona; Myeloencephalitis; Immunohistochemistry; Brazil.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000600052
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Aortic body tumors in dogs from Northern Paraná, Brazil Ciência Rural
Headley,Selwyn Arlington; Bracarense,Ana Paula; Nakagawa,Tizianne; Moreno,Kleber; Pereira,Patrícia Mendes; Reis,Antônio Carlos Faria dos.
This article describes the occurrence of aortic body tumors in four dogs from Southern Brazil. All dogs were males, more than 9 year of age; most of these were from the Boxer breed of dogs. The animals had large neoplastic growths at the base of the heart, which demonstrated histologic characteristics consistent with that of aortic body tumor. By immunohistochemistry, tissue sections from all dogs reacted positively to neuron specific enolase. These cases might represent the first description of this tumor in dogs from Brazil, as confirmed by immunohistochemistry.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dog; Heart; Aortic body tumor; Immunohistochemistry; Neuron specific enolase.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000600045
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Aversive stimulation during the stress-hyporesponsive period does not affect the number of corticotroph cells in neonatal male rats BJMBR
Aguiar,C.E.; Cadore,L.P.; Padoin,M.J.; Barbosa-Coutinho,L.M.; Lucion,A.B..
Immunohistochemistry was used to evaluate the effects of neonatal handling and aversive stimulation during the first 10 days of life on the number of corticotrophs in the anterior lobe of the pituitary of 11-day-old male Wistar rats. Since adult rats handled during infancy respond with reduced corticosterone secretion in response to stressors and with less behavior inhibition in novel environments, we assumed that neonatal stimulation could affect pituitary morphology during this critical period of cell differentiation. Three groups of animals were studied: intact (no manipulation, N = 5), handled (N = 5) and stimulated (submitted to 3 different aversive stimuli, N = 5). The percentage of ACTH-immunoreactive cells in the anterior lobe of the pituitary...
Tipo: Info:eu-repo/semantics/article Palavras-chave: ACTH; Immunohistochemistry; Pituitary; Neonatal handling; Stress.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001200013
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Bovine respiratory syncytial virus: immunohistochemichal detection in mouse and bovine tissues using a Mab against human respiratory syncytial virus Arq. Bras. Med. Vet. Zootec.
Almeida,R.S.; Spilki,F.R.; Roehe,P.M.; Verinaud,L.M.C.; Arns,C.W..
An immunoistochemical (IHC) test was developed to detect bovine respiratory syncytial virus (BRSV) in cell cultures and tissues of experimentally infected mice and calves, using a commercial monoclonal antibody (Mab) against human respiratory syncytial virus (HRSV), as a less expensive alternative, instead of producing specific monoclonal antibodies to BRSV. Clinical samples from calves suffering respiratory disease were also submitted to this test. IHC detected BRSV antigens in mouse tracheas (3, 5 and 7 days post-infection) and lungs (5 and 7 days post-infection), and in one of three lungs from experimentally infected calves. Lungs samples from two naturally infected calves were tested and resulted positive for BRSV by the IHC test. These results suggest...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bovine respiratory syncytial virus; Immunohistochemistry; Calf; Mice; Experimental infection; Monoclonal antibody.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000600001
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Bovine viral diarrhea diagnostic: immunohistochemistry standardization for routine Arq. Bras. Med. Vet. Zootec.
Andrade,G.I.; Serra,C.V.; Barbosa-Stancioli,E.F.; Serakides,R.; Lobato,Z.I.P..
The immunohistochemistry standardization for bovine viral diarrhea virus (BVDV) diagnostic was described. The formalin-fixed tissue samples from a heifer with mucosal disease were used as positive control. The validation of the first phase results was performed using samples from an aborted fetus and a calf infected with reference strains of BVDV. The best results were seen using monoclonal antibodies and a commercial kit consisting of labelled streptavidin biotin (LSAB) reagents and the diaminobenzidine (DAB) substrate-chromogen reagent. The immunohistochemistry demonstrated to be an useful method for routine diagnosis for the controll and detection of BVDV infection.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bovino; Diarréia bovina a vírus; Imunoistoquímica; Bovine viral diarrhea; Virus; Immunohistochemistry.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000500018
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Caracterização histológica e imuno-histoquímica das lesões de tuberculose em bovinos e de linfadenite granulomatosa em suínos. Repositório Alice
ANDREAZZA, D.; BOOS, G. S.; BOABAID, F. M.; WOUTERS, A. T. B.; SOUZA, S. O..
Mycobacterium sp. induz inflamação granulomatosa em diferentes espécies animais. Mycobacterium bovis e o complexo Mycobacterium avium são importantes patógenos de bovinos e suínos e podem causar infecção em humanos, principalmente imunossuprimidos. Perdas na produção, barreiras comerciais e prejuízos por condenação de carcaças em abatedouro/frigorífico estão atrelados à ocorrência dessas infecções, com prejuízos econômicos significativos. Foi realizado um estudo de casos diagnosticados como tuberculose em bovinos e linfadenite granulomatosa em suínos no Setor de Patologia Veterinária da Universidade Federal do Rio Grande do Sul (SPV-UFRGS) no período de janeiro de 2007 a dezembro de 2011. Dados referentes à raça, ao sexo, à idade e ao histórico clínico...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Doença infecciosa; Mycobacterium spp; Imuno-histoquímica; Suíno; Bovino; Infectious diseases; Cattle; Swine; Immunohistochemistry.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1037598
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Carcinoid of the gallbladder in two dogs Ciência Rural
Argenta,Fernando Froner; Pereira,Paula Reis; Bertolini,Marianna; Fratini,Letícia Mendes; Saccaro,Renata de Oliveira; Sonne,Luciana; Driemeier,David; Pavarini,Saulo Petinatti.
ABSTRACT: A carcinoid is a rare neoplasm derived from neuroendocrine cells that may arise in the hepatobiliary system. This report described two cases of carcinoid of the gallbladder in dogs, with emphasis on the clinical, pathological and immunohistochemical aspects. Case 1 was a 10-year-old female Shih Tzu, with a history of prostration and occasional episodes of diarrhea and vomiting. Case 2 was a 10-year-old male Cocker Spaniel, with a history of diarrhea and abdominal pain. Abdominal ultrasonography suggested a neoplasm of the gallbladder in both cases. The dogs underwent cholecystectomy, and 10% formalin-fixed samples were sent for pathological examination. Histologically, a neoplastic proliferation of neuroendocrine cells was observed in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canine; Neoplasm; Neuroendocrine carcinoma; Immunohistochemistry.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200551
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Cardiac rhabdomyoma in a slaughtered pig Ciência Rural
Pereira,Paula Reis; Cruz,Raquel Aparecida Sales da; Jühlich,Luciane Maria; Sonne,Luciana; Barcellos,David Emílio Santos Neves de; Driemeier,David.
ABSTRACT: Rhabdomyoma is a rare neoplasm of striated muscle that occurs predominantly in the myocardium. In animals, cardiac rhabdomyoma are observed as incidental lesions in slaughter pigs and have been rarely described in other species, such as cattle, dogs, and deer. This report describes a case of cardiac rhabdomyoma in a male pig at slaughter age that died suddenly in the pre-slaughter period. At necropsy, multiple nodules were observed in the right and left ventricular walls and the interventricular septum. Histopathological examination showed neoplastic proliferation composed of polyhedral cells, with vacuolated cytoplasm that sometimes presented a “spider cell” appearance. Histochemical staining with Schiff’s periodic acid revealed glycogen...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pig; Cardiac tumor; Glycogen; Spider cell; Immunohistochemistry.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001000553
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Changes in expression of BDNF and its receptors TrkB and p75NTR in the hippocampus of a dog model of chronic alcoholism and abstinence BJMBR
Xu,R.; Duan,S.R.; Zhao,J.W.; Wang,C.Y..
Chronic ethanol consumption can produce learning and memory deficits. Brain-derived neurotrophic factor (BDNF) and its receptors affect the pathogenesis of alcoholism. In this study, we examined the expression of BDNF, tropomyosin receptor kinase B (TrkB) and p75 neurotrophin receptor (p75NTR) in the hippocampus of a dog model of chronic alcoholism and abstinence. Twenty domestic dogs (9-10 months old, 15-20 kg; 10 males and 10 females) were obtained from Harbin Medical University. A stable alcoholism model was established through ad libitum feeding, and anti-alcohol drug treatment (Zhong Yao Jie Jiu Ling, the main ingredient was the stems of watermelon; developed in our laboratory), at low- and high-doses, was carried out. The Zhong Yao Jie Jiu Ling was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chronic alcoholism; Brain-derived neurotrophic factor; Tropomyosin receptor kinase B; P75 Neurotrophin receptor; Immunohistochemistry.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000800703
Registros recuperados: 129
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