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1.
Braz. j. med. biol. res ; 56: e12647, 2023. graf
Article Dans Anglais | LILACS-Express | LILACS | ID: biblio-1505885

Résumé

DiGeorge syndrome is a disorder caused by a microdeletion on the long arm of chromosome 22. Approximately 1% of patients diagnosed with DiGeorge syndrome may have an absence of a functional thymus, which characterizes the complete form of the syndrome. These patients require urgent treatment to reconstitute T cell immunity. Thymus transplantation is a promising investigational procedure for reconstitution of thymic function in infants with congenital athymia. Here, we demonstrate a possible optimization of the preparation of thymus slices for transplantation through prior depletion of thymocytes and leukocyte cell lineages followed by cryopreservation with cryoprotective media (5% dextran FP 40, 5% Me2SO, and 5% FBS) while preserving tissue architecture. Thymus fragments were stored in liquid nitrogen at -196°C for 30 days or one year. The tissue architecture of the fragments was preserved, including the distinction between medullary thymic epithelial cells (TECs), cortical TECs, and Hassall bodies. Moreover, depleted thymus fragments cryopreserved for one year were recolonized by intrathymic injections of 3×106 thymocytes per mL, demonstrating the capability of these fragments to support T cell development. Thus, this technique opens up the possibility of freezing and storing large volumes of thymus tissue for immediate transplantation into patients with DiGeorge syndrome or atypical (Omenn-like) phenotype.

2.
Arq. bras. med. vet. zootec. (Online) ; 70(3): 704-712, maio-jun. 2018. tab, graf, ilus
Article Dans Portugais | LILACS, VETINDEX | ID: biblio-911177

Résumé

A classificação de estado físico ASA (Sociedade Americana de Anestesiologistas) é uma ferramenta importante para a avaliação pré-anestésica do paciente. Assim, é utilizada em diversos estudos por possuir estreita relação com a morbidade e a mortalidade anestésica. Realizou-se tal classificação em 243 pacientes caninos submetidos a procedimentos cirúrgicos em um Hospital Veterinário Universitário. Os resultados obtidos foram os seguintes: ASA I (38; 15,64%), ASA II (53; 21,81%), ASA II emergencial (E) (2; 0,82%), ASA III (78; 32,10%), ASA III E (23; 9,46%), ASA IV (11; 4,53%), ASA IV E (36; 14,81%) e ASA V (2; 0,82%). Verificou-se que a maior parte dos pacientes foram classificados como ASA III (doença sistêmica moderada), o que demonstra que, no serviço analisado, a maioria dos animais submetidos à cirurgia são portadores de enfermidades. A mortalidade foi de 2,46%, com a maioria dos óbitos ocorridos no pós-operatório e em pacientes com emergências. Concluiu-se que, no serviço analisado, os maiores riscos estão relacionados aos pacientes com categorias ASA de maior gravidade, em cirurgias emergenciais e, especialmente, no período pós-operatório.(AU)


The classification ASA (American Society of Anesthesiologists) is an important tool for assessing a patient's pre anesthetic. Thus, it is used in many studies because it has close relation with anesthetic morbidity and mortality. This classification was performed on 243 canine patients undergoing surgical procedures at the Veterinary Teaching Hospital. The results obtained were as follows: ASA I (38, 15.64%), ASA II (53; 21.81%), ASA II Emergency (E) (2; 0.82%), ASA III (78; 32.10%), ASA III E (23; 9.46%), ASA IV (11; 4.53 %), ASA IV E (36; 14.81%), and ASA V (2; 0.82%). Most patients were ASA III (moderate systemic disease), demonstrating that in the analyzed service the most operated animals are carriers of disease. The mortality rate was 2.46%, with most deaths occurring postoperatively and in patients with an emergency. The greatest risks are related to patients with more severe categories of the classification ASA, in emergency surgery, and especially in the postoperative period.(AU)


Sujets)
Animaux , Chiens , Anesthésie/classification , Anesthésie/mortalité , Anesthésie/médecine vétérinaire , Chiens/chirurgie , Mortalité
3.
Article Dans Portugais | LILACS-Express | LILACS, VETINDEX | ID: biblio-1489486

Résumé

O Fenômeno de Lúcio (FL) representa uma reação cutânea necrosante grave, que pode ocorrer na Hanseníase de Lúcio e em outras formas de Hanseníase Virchowiana. Manifesta-se 3-4 anos após o início da doença e é mais comum em pacientes não tratados ou recebendo dose inadequada de tratamento. Caracteriza-se por surtos de máculas eritematosas, ligeiramente infiltradas, que evoluem com necrose central e posterior ulceração. Sua fisiopatogenia é ainda desconhecida, porém é consenso que se trata fundamentalmente de um processo trombótico-oclusivo. Na histologia observa-se trombose de pequenos vasos da derme superior e média, resultando em ulceração da epiderme, infiltrado inflamatório com histiócitos espumosos, e numerosos bacilos, inclusive na parede dos vasos.

4.
Braz. j. phys. ther. (Impr.) ; 11(4): 283-288, jul.-ago. 2007. ilus, graf
Article Dans Portugais | LILACS | ID: lil-461687

Résumé

OBJETIVO: Comparar a influência da terapia laser baixa intensidade (TLBI) na organização das fibras de colágeno, na dose de 3J/cm² em dois comprimentos de onda (lambda) (670nm e 904nm) e na associação de ambos, durante o reparo do tendão calcâneo de ratos. MÉTODO Foram utilizadas 37 ratas da raça Wistar divididas em 5 grupos, submetidas a tenotomia total por meio de cisalhamento transversal do tendão na porção média entre a inserção calcânea e a junção miotendínea, com exceção do grupo GP (n= 6) que não houve lesão. O grupo GA (n= 8) foi submetido à irradiação laser lambda= 904nm, diodo de GaAs, emissão pulsada, duração do pulso de 180ns, freqüência de pulso de 2000Hz e potência de pico de 15W e dose de 3J/cm². O grupo GB (n= 8) foi submetido à irradiação laser lambda= 670nm, diodo de AlGaInP, emissão contínua, potência 30mW e dose de 3J/cm². O grupo GAB (n= 8) recebeu irradiação de ambos os lasers 670nm e 904nm associados. O grupo GCL (n= 7) foi submetido a um tratamento placebo, assim como um grupo padrão. Após um total de 12 sessões de laserterapia, os animais foram submetidos à eutanásia no 14º dia pós-operatório. Após processamento histológico padrão, foi realizada a quantificação do retardo óptico pela birrefringência. RESULTADOS: A análise estatística mostra que todos os grupos irradiados apresentaram valores de retardo óptico maiores quando comparados ao grupo placebo (p= 0,00001), o que indica que apresentaram melhor organização das fibras colágenas ao longo do eixo longitudinal do tendão, evidenciando melhor qualidade no reparo. O grupo GAB foi o que apresentou melhores resultados (p= 0,00001) quando comparado aos demais grupos, excetuando-se o GP, que é o referencial de retardo óptico para esta faixa etária.


OBJECTIVE: The aim of this study was to compare the effect of the low level laser therapy in the organization of the collagen fibers with 3 J/cm² of dose in two wavelengths (670nm and 904nm) and in the combination of both on the tissue repair of the calcaneus tendon. METHODS: We used 37 female Wistar rats divided in 5 groups which had been submitted to the total tenotomy. Group GA (n= 8) was submitted to the laser irradiation in lambda= 904nm, GaAS diode, pulsated emission, peak power 15W and dose of 3J/cm², group GB (n= 8) was submitted to laser irradiation lambda= 670nm AlGaInP diode, continuous emission, power 30 mW and dose 3J/cm², group GAB (n= 8) was submitted to association of both of lasers and group GCL (n= 7) which the calcaneum tendon was submitted to placebo treatment. The group GP (n= 6) was a standard group without lesion and treatment. The animals received 12 sessions of lasertherapy and submitted to euthanasia on 14th day after surgery. The tendons were submitted to histological procedure and were analyzed to evaluate the optic retardation (in nm) for the birefringence measurement. RESULTS: The statistic analysis showed that the irradiated groups have higher values of optic retardation statistically significant than placebo group (p= 0,00001). It indicates that all the treated groups show better organization of collagen fibers in the longitudinal axis of the tendon, evidencing better quality in the tissue repair. The group GAB was that shown best results (p= 0,00001) when compared to another groups.


Sujets)
Rats , Animaux , Tendon calcanéen , Biréfringence , Photothérapie de faible intensité , Rat Wistar
5.
Arq. bras. med. vet. zootec ; 58(3): 316-319, jun. 2006. ilus
Article Dans Portugais | LILACS | ID: lil-443582

Résumé

Relatam-se dois casos de listeriose ocorridos em ovinos leiteiros da raça Lacaune, mantidos em confinamento e alimentados com silagem de milho. O exame histológico do tecido nervoso mostrou meningoencefalite supurada, e a imunoistoquímica foi positiva para Listeria monocytogenes com isolamento da bactéria do tecido nervoso. Enfatiza-se a ocorrência dessa enfermidade em ovinos leiteiros que apresentavam lesões na cavidade oral e eram alimentados com silagem de baixa qualidade.


Clinical cases of listeriosis in two Lacaune rams, fed silage in a lot, are reported. Histological examination of nervous tissue revealed purulent meningoencephalitis, and L. monocytogenes was detected in nervous tissue by immunohistochemistry procedures. This disease should be suspected when oral lesions are visible in dairy sheep fed low quality silage.


Sujets)
Animaux , Listeria monocytogenes/isolement et purification , Infections à Listeria/épidémiologie , Méningoencéphalite/diagnostic , Ovis
6.
Mem. Inst. Oswaldo Cruz ; 97(suppl.1): 71-75, Oct. 2002. ilus, tab
Article Dans Anglais | LILACS | ID: lil-325017

Résumé

In the last decade microsatellites have become one of the most useful genetic markers used in a large number of organisms due to their abundance and high level of polymorphism. Microsatellites have been used for individual identification, paternity tests, forensic studies and population genetics. Data on microsatellite abundance comes preferentially from microsatellite enriched libraries and DNA sequence databases. We have conducted a search in GenBank of more than 16,000 Schistosoma mansoni ESTs and 42,000 BAC sequences. In addition, we obtained 300 sequences from CA and AT microsatellite enriched genomic libraries. The sequences were searched for simple repeats using the RepeatMasker software. Of 16,022 ESTs, we detected 481 (3 percent) sequences that contained 622 microsatellites (434 perfect, 164 imperfect and 24 compounds). Of the 481 ESTs, 194 were grouped in 63 clusters containing 2 to 15 ESTs per cluster. Polymorphisms were observed in 16 clusters. The 287 remaining ESTs were orphan sequences. Of the 42,017 BAC end sequences, 1,598 (3.8 percent) contained microsatellites (2,335 perfect, 287 imperfect and 79 compounds). The 1,598 BAC end sequences 80 were grouped into 17 clusters containing 3 to 17 BAC end sequences per cluster. Microsatellites were present in 67 out of 300 sequences from microsatellite enriched libraries (55 perfect, 38 imperfect and 15 compounds). From all of the observed loci 55 were selected for having the longest perfect repeats and flanking regions that allowed the design of primers for PCR amplification. Additionally we describe two new polymorphic microsatellite loci


Sujets)
Animaux , Bases de données d'acides nucléiques , Banque génomique , Répétitions microsatellites , Schistosoma mansoni , Séquence nucléotidique , Brésil , Biologie informatique , ADN des helminthes , Réaction de polymérisation en chaîne , Polymorphisme génétique , Séquences répétées d'acides nucléiques , Analyse de séquence d'ADN
7.
Arq. bras. med. vet. zootec ; 52(3): 250-5, jun. 2000. tab
Article Dans Portugais | LILACS | ID: lil-265591

Résumé

O objetivo do experimento foi avaliar a digestibilidade in vitro da matéria seca das silagens de 20 genótipos de sorgo, ensilados aos 104 dias de idade em silos de PVC, com 10cm de diâmetro e 40cm de comprimento. Os silos foram abertos 150 dias após a ensilagem para determinaçäo dos teores e perdas de matéria seca (MS), e da digestibilidade in vitro da matéria seca (DIVMS). As diferenças foram verificadas pelo teste SNK e o delineamento experimental adotado foi o inteiramente ao acaso, com três repetiçöes por tratamento. Os teores de MS das silagens variaram de 23,7 por cento a 31,8 por cento, e todas elas apresentaram pequenas perdas de MS. Näo houve diferença entre as silagens dos vinte genótipos quanto aos teores de MS e perdas de MS, mas houve diferença na DIVMS. Os híbridos C 22 e CMSXS 756 apresentaram os maiores valores (62,8 e 63,0 por cento) e os híbridos 547 e C 11 os menores valores (54,1 e 55,5 por cento de DIVMS, respectivamente


Sujets)
Aliment pour animaux , Grains comestibles , Ensilage
8.
Braz. j. med. biol. res ; 26(1): 31-6, Jan. 1993. tab
Article Dans Anglais | LILACS | ID: lil-148670

Résumé

The ability of high dietary carbohydrate to induce acute pancreatitis was investigated in groups of 16, 21-day and 15-month old rats fed different carbohydrate diets for 30 days. Significantly increased levels of serum amylase (2-fold), phospholipids (50 per cent ), phosphorus (2-fold), and lipoperoxides (8-fold) were observed in 15-month old rats fed a high-carbohydrate diet, compared to rats fed a diet with normal carbohydrate levels, indicating peroxidation of membrane lipids which caused final cell death and pancreatic lesion. Serum Cu-Zn superoxide dismutase activity was not altered. Daily administration of bovine Cu-Zn superoxide dismutase conjugated with polyethylene glycol prevented the serum level alterations and pancreatic lesions, indicating that the superoxide radical has a role in dietary carbohydrate-induced acute pancreatitis. No biochemical changes were observed in rats in which treatment was initiated on the 21st day of life indicating that this is an age-related lesion


Sujets)
Animaux , Rats , Hydrates de carbone alimentaires/effets indésirables , Pancréatite/étiologie , Maladie aigüe , Association de médicaments , Pancréatite/traitement médicamenteux , Polyéthylène glycols/usage thérapeutique , Superoxide dismutase/usage thérapeutique , Facteurs temps
9.
Braz. j. med. biol. res ; 23(8): 643-5, 1990. tab
Article Dans Anglais | LILACS | ID: lil-92268

Résumé

The superoxide anion (O2) is an extremely potent free radical which is produced during the metabolism of aerobic linving cells. (O2) may be involved in lipid peroxidation reactions which occur in a variety of systems. Cu-Zn speroxide dimutase, a metalloprotein, catalyzes the dismutation of the superoxide free radical and protects cells aginst superoxide damage. The ability of NiCl2 to prevent lysis of erythrocytes was tested in rats. NiCl2 administered by intratracheal rouyte prevented hemolysis and decreased total lipids, phospholipids and bilirubin in serum. The protective effect of NiCl2 was linked to an increase in the erytrocyte activity of superoxide dismutase


Sujets)
Érythrocytes/effets des médicaments et des substances chimiques , Superoxide dismutase/métabolisme
12.
Arq. bras. cardiol ; 38(1): 49-53, 1982.
Article Dans Portugais | LILACS | ID: lil-7406

Résumé

A neurofibromatose e uma facomatose que acomete todos os folhetos embrionarios, acompanhando-se frequentemente de lesoes em qualquer local do organismo. Essa doenca esta associada a hipertensao arterial sistemica e ate 1% dos pacientes apresentam feocromocitoma. Menos divulgada e a associacao com doenca vascular renal, encontrada em 75 pacientes numa revisao ampla da literatura ocidental, e que pode ser concomitante a coartacao da aorta abdominal. Relatamos aqui um caso apresentando doenca vascular renal e coartacao da aorta abdominal, com evolucao documentada de 2 anos. Comentam-se aspectos clinicos, radiologicos e patologicos desta lesao,com revisao atualizada da literatura


Sujets)
Neurofibromatoses , Coarctation aortique , Hypertension rénovasculaire
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