Your browser doesn't support javascript.
loading
Montrer: 20 | 50 | 100
Résultats 1 - 4 de 4
Filtre
Ajouter des filtres








Gamme d'année
1.
Acta cir. bras ; 36(10): e361005, 2021. graf
Article Dans Anglais | LILACS, VETINDEX | ID: biblio-1349864

Résumé

ABSTRACT Purpose: Reactive oxygen species (ROS), interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) have been shown in the pathogenesis of acrylamide neurotoxicity. Hippophae rhamnoides L. extract (HRE) has a cytoprotective effect by stabilizing the production of ROS, IL-1β and TNF-α. The objective of the article was to investigate the effect of HRE on acrylamide-induced brain damage in rats biochemically and histopathologically. Methods: To the HRE+acrylamide only (ACR) group (n=6) of the animals, HRE was administered orally at a dose of 50 mg / kg into the stomach by gavage. The same volume of solvent (olive oil) was administered orally to the ACR (n=6) and healthy (HG) (n=6) groups. One hour after HRE administration, acrylamide was given orally at a dose of 20 mg/kg to HRE+ACR and ACR groups in the same way. This procedure was repeated once a day for 30 days. At the end of this period, brain tissues extracted from animals killed with 50 mg/kg thiopental anesthesia were examined biochemically and histopathologically. Results: It has been shown that HRE prevents the increase of malondialdehyde (MDA), myeloperoxidase (MPO), IL-1β and TNF-α with acrylamide and the decrease of total glutathione (tGSH) and glutathione reductase (GSHRd) levels in brain tissue. Conclusions: HRE may be useful in the treatment of acrylamide-induced neurotoxicity.


Sujets)
Animaux , Rats , Lésions encéphaliques/induit chimiquement , Lésions encéphaliques/traitement médicamenteux , Extraits de plantes/pharmacologie , Hippophae/composition chimique , Stress oxydatif , Malonaldéhyde , Antioxydants/pharmacologie
2.
Arq. bras. endocrinol. metab ; 52(2): 288-298, mar. 2008. graf, tab
Article Dans Portugais | LILACS | ID: lil-480998

Résumé

Os portadores de diabetes melito tipo 1 têm, com freqüência, episódios de hipoglicemia durante a insulinoterapia, que, além do desconforto e de proporcionar situações constrangedoras no dia-a-dia, impedem a obtenção do controle glicêmico ideal. Mais ainda, hipoglicemias induzem deficiente mecanismo de contra-regulação em episódio posterior, com diminuição de liberação de adrenalina e dos sintomas de alarme, estabelecendo a síndrome de hipoglicemia associada à insuficiência autonômica. A ocorrência de hipoglicemias durante algumas atividades de risco, em especial a direção veicular, pode resultar acidentes com o paciente e terceiros, além de lesão de propriedade, motivo pelo qual pessoas com diabetes devem ser orientadas quanto aos cuidados na direção de veículos. Em geral, a recuperação neurológica é total após a correção de coma hipoglicêmico. No entanto, quando esses episódios são repetitivos, especialmente em crianças, podem ter como conseqüência distúrbios cognitivos definitivos. A reversão de quadros de hipoglicemia sem sinal de alerta é difícil, devendo-se evitar meticulosamente sua ocorrência, adequando o tratamento, os alvos glicêmicos, utilizando a monitoração domiciliar e fazendo treinamento para o reconhecimento precoce de hipoglicemias.


Type 1 diabetic patients frequently present hypoglycemic episodes during their insulinotherapy, which, besides the discomfort and constrains does not allow the ideal glycemic control. Further, hypoglycemic events lead to the deficiency of the counter-regulation mechanisms in the subsequent episode, with a decrease in the release of epinephrine and the symptoms of warming, with great risk of severe hypoglycemia. The occurrence of hypoglycemia during some risky activities, specially driving, could result in accidents with the patient and /or third parts including property damage, stressing here the need to advise diabetics against having the necessary caution wheli driving. Generally the connective recovery is total after correcting a hypoglycemic coma. However when these episodes are repetitive, particularly in children, they could result in definitive cognitive disturbances. Hypoglycemic events without a warning signal (hypoglycemic unawareness) are difficult to reverse, thus it is necessary to prevent their occurrence, adjusting the treatment with glycemic targets, using continuous glucose monitoring at home and teaching them how to have an early recognition of hypoglycemia.


Sujets)
Adolescent , Adulte , Sujet âgé , Enfant , Enfant d'âge préscolaire , Humains , Adulte d'âge moyen , Jeune adulte , Diabète de type 1/traitement médicamenteux , Hypoglycémie/induit chimiquement , Hypoglycémiants/effets indésirables , Insuline/effets indésirables , Accidents de la route , Maladies du système nerveux autonome/induit chimiquement , Autosurveillance glycémique , Lésions encéphaliques/induit chimiquement , Agents gastro-intestinaux/usage thérapeutique , Glucagon/déficit , Glucagon , Glucagon/usage thérapeutique , Insuline , Jeune adulte
3.
Arq. neuropsiquiatr ; 64(4): 1036-1038, dez. 2006. ilus
Article Dans Anglais, Portugais | LILACS | ID: lil-439768

Résumé

OBJECTIVE: To present the imaging findings of a patient with diffuse brain injury secondary to intoxication with oral hypoglycemics. CASE REPORT: A nine years-old boy presented with generalized tonic-clonic convulsions and decreased consciousness. Laboratory investigation demonstrated blood glucose level of 21 mg/dL. The magnetic resonance imaging showed cortical and subcortical temporo-parieto-occipital areas of high signal on T2 and low signal on T1, with high signal on the diffusion-weighted images and low signal on apparent diffusion coefficient maps. CONCLUSION: Cortical and subcortical temporal, parietal and occipital ischemic lesions may be seen in patients with intoxication by oral hypoglycemics.


OBJETIVO: Apresentar os achados de imagem em um caso de lesão cerebral difusa secundária a intoxicação por hipoglicemiante oral. RELATO DE CASO: Menino de nove anos de idade apresentando crises convulsivas tônico-clônicas e rebaixamento do nível de consciência. Exames laboratoriais revelaram glicose sérica de 21 mg/dL. O exame de ressonância magnética revelou lesões corticais e subcorticais têmporoparieto-occipitais, com alto sinal em T2 e baixo em T1, apresentando hipersinal nas imagens ponderadas em difusão e hipossinal nos mapas de coeficiente aparente de difusão. CONCLUSÃO: Lesões isquêmicas corticais e subcorticais nos lobos temporais, parietais e occipitais podem ser identificadas em pacientes com intoxicação por hipoglicemiantes orais.


Sujets)
Enfant , Humains , Mâle , Lésions encéphaliques/induit chimiquement , Hypoglycémiants/intoxication , Lésions encéphaliques/diagnostic , Imagerie par résonance magnétique
4.
Arq. neuropsiquiatr ; 52(1): 93-5, mar. 1994. ilus
Article Dans Portugais | LILACS | ID: lil-129374

Résumé

Tivemos a oportunidade de acompanhar com exames de TC caso de intoxicaçäo por metanol. O paciente foi submetido ao exame no momento da internaçäo e após seis dias, pela persistência de quadro neurológico grave. Observou-se nesta última a presença de lesöes putaminais simétricas e da substância branca subcortical, apesar do tratamento adequado. A comprovaçäo tomográfica de lesöes cerebrais evidenciou efeito tóxico do metanol e pode orientar o prognóstico neurológico


Sujets)
Humains , Mâle , Adulte , Lésions encéphaliques , Méthanol/intoxication , Putamen/traumatismes , Acidose respiratoire/métabolisme , Lésions encéphaliques/induit chimiquement , Méthanol/métabolisme , Pronostic , Putamen , Putamen/effets des médicaments et des substances chimiques , Tomodensitométrie
SÉLECTION CITATIONS
Détails de la recherche