Doença cerebrovascular na infância: investigação neuropsicológica em 14 casos

There are few studies about the development of a child after a cerebrovascular accident (CVA), and they usually describe problems such as diminishing in intellectual capacities, difficulties in linguistic and visual-motor skills, as well as in spatial organization and integration. In this study, there were 28 children participating, being 14 placed in the experimental group (EG) after clinical diagnosis and ischemic CVA imaging, and other 14 children without past history of CVA, who formed the control group (CG). The neuropsychological research protocol included an intelligence test, a visual-motor coordination test, human figure drawing, a cortical functions battery and the medical records of the children from the EG. The analysis of the results of this study revealed that the best performances after the CVA are related to the shortest time of functional recovery; CG presented better performances than EG in all the instruments used, in cognitive, perceptual and motor skills. It has been noticed that CVA may lead to intellectual reduction in case of a recurrence of the vascular insult.Nos poucos estudos acerca do desenvolvimento da criança após o acidente vascular cerebral (AVC) são descritos problemas como rebaixamento intelectual, dificuldades na capacidade lingüística, viso-motora, na organização e integração espacial. Neste estudo fizeram parte 28 crianças, sendo 14 pertencentes ao grupo experimental (GE) com diagnóstico clínico e de imagem de AVC isquêmico. Outras 14 crianças sem história de AVC que formaram o grupo controle (GC). O protocolo de investigação neuropsicológica constou de teste de inteligência, teste de coordenação viso-motor, desenho da figura humana, bateria de funções corticais e prontuário médico das crianças do GE. A análise dos resultados deste estudo mostrou que os melhores desempenhos após o AVC, estão relacionados ao menor tempo de recuperação funcional; houve desempenho superior do GC sobre o GE em todos os instrumentos utilizados, nas áreas cognitiva, perceptual e motora. Constatou-se ainda que o AVC pode levar a rebaixamento intelectual, quando ocorre um quadro de repetição do insulto vascular.414

Dichotic listening and spect in dyslexic children

Dichotic listening (DL) was evaluated in 36 children with: verbal dichotic listening test, alternating dissilable dichotic test and non-verbal dichotic listening test. Children were separated into two groups: experimental group with 18 dyslexic children and control group with 18 normal children. Both groups were comparable in gender, laterality and social-economic level. All dyslexic children underwent neuroimaging exam (SPECT). Our data showed that there was a statistical difference between both groups in all DL tests. Abnormal SPECT findings were seen in 50% of the dyslexic children, hypoperfusion of the left temporal lobe being the most frequent abnormality. We conclude that dyslexic children present an impairment of central neurologic processing that may be detected by DL tests, and by functional imaging exam, such as SPECT, as well.Aplicamos em um grupo de 36 crianças os testes dicótico de dígitos, dicótico de dissílabos alternados e dicótico não-verbal, os quais fazem parte do conjunto de avaliação do processamento auditivo. As crianças foram divididas em dois grupos que foram correlacionados: grupo experimental (GE) formado por 18 crianças com diagnóstico de dislexia e 18 crianças normais compondo o grupo comparação (GC), sem queixa de aprendizagem e pareadas em relação a sexo, lateralidade e nível sócio-econômico ao GE. Realizamos o exame de imagem (SPECT) no GE. Encontramos em nosso estudo diferença estatisticamente significante entre os grupos (GE e GC) em todos os testes avaliados. Em relação ao SPECT, apesar de não encontrarmos diferença estatisticamente significante entre os resultados, pudemos observar que 50% dos sujeitos avaliados apresentaram alteração, sendo a maior parte em áreas do lobo temporal esquerdo. Concluímos que crianças com dislexia apresentam alterações do processamento neurológico central que podem ser detectadas tanto em testes específicos de processamento auditivo, quanto em exames funcionais de imagem como SPECT.Universidade Estadual de São Paulo Faculdade de Ciências Médicas Departamento de NeurologiaUniversidade Federal de São Paulo (UNIFESP) Departamento de Distúrbios da ComunicaçãoUNIFESP, Depto. de Distúrbios da ComunicaçãoSciEL

VP6-SUMO Self-Assembly as Nanocarriers for Gastrointestinal Delivery

High proteolytic degradation and poor absorption through epithelial barriers are major challenges to successful oral delivery of therapeutics. Nanoparticle platforms can enhance drug stability and extend the residence time in gastrointestinal (GI) tract. However, drug delivery systems are often inactivated in acidic environment of stomach or suffer poor absorption from intestinal cells due to the mucus layer. To overcome these issues we developed a drug delivery system constituted by a protein construct made by a Rotavirus capsid protein (VP6) and the small ubiquitin-like modifier SUMO. This chimeric construct allows specificity towards intestinal cells, the Rotavirus natural target, combined by an enhanced stability given by the eukaryotic protein transporter SUMO. Furthermore SUMO can act as a molecular switch that facilitates import/export of its ligand to the nucleus, the hypersensitive subcellular site target of many cell killing therapies. In this paper we show that SUMO-VP6 constructs self-assembly into stable nanocarriers. SUMO-VP6 nanocarriers display ideal features for drug delivery: a small size and high monodispersity, a high stability in different pH conditions and a high uptake in the nuclear and cytoplasmic compartment of intestinal cells. These features make SUMO-VP6 nanocarriers a promising novel system for oral delivery of poorly soluble drugs

Controlling the Cassie-to-Wenzel Transition: an Easy Route towards the Realization of Tridimensional Arrays of Biological Objects

In this paper we provide evidence that the Cassie-to-Wenzel transition, despite its detrimental effects on the wetting properties of superhydrophobic surfaces, can be exploited as an effective micro-fabrication strategy to obtain highly ordered arrays of biological objects. To this purpose we fabricated a patterned surface wetted in the Cassie state, where we deposited a droplet containing genomic DNA. We observed that, when the droplet wets the surface in the Cassie state, an array of DNA filaments pinned on the top edges between pillars is formed. Conversely, when the Cassie-to-Wenzel transition occurs, DNA can be pinned at different height between pillars. These results open the way to the realization of tridimensional arrays of biological objects

[medical Residence In Pediatric Neurology In Brazil].

We present the results of a research on Medical Residence in Pediatric Neurology, classifying present information on the teaching and training in the several centers of formation in Brazil. It was possible to contact 17 Institutions with organized services, being 6 accredited by CNRM (National Council of Medical residence), 10 non accredited, and one under diligence. The program content is developed in 3 or 4 years, including the pre-qualification, being the annual schedule load variable, from 1900 to 2880 hours / year.58777-8

Fragile X Syndrome. Clinical, Electroencephalographic And Neuroimaging Characteristics.

We studied 11 patients (9 males) with cytogenetic diagnosis of fragile X syndrome (FXS) with the purpose of investigating the neural circuitry involved in this condition. The ages ranged from 8 to 19. All the individuals presented large ears, elongated faces and autistic features. Ten patients had severe mental retardation. Attention disorder was found in 10 individuals. Electroencephalographic recordings were abnormal in 6 of 10 patients examined, showing focal epileptiform discharges predominantly in frontal and parietal areas. All patients underwent magnetic resonance imaging studies which were abnormal in 8 of them. The most important abnormalities were reduction of the cerebellar vermis and enlargement of the IV ventricle. Single photon emission computerized tomography (SPECT) was performed in 7 patients and was abnormal in all of them, the most frequent finding being a hypoperfusion of the inferior of the frontal lobes. Based on the clinical picture, neuropsychological findings and functional and structural imaging studies we suggest that FXS presents with a dysfunction involving a large area of the central nervous system: cerebellum-basal frontal regions-parietal lobes. The literature points to a disturbance involving the same neural circuitry in patients with autism.5618-2

Dichotic listening and SPECT in dyslexic children

Dichotic listening (DL) was evaluated in 36 children with: verbal dichotic listening test, alternating dissilable dichotic test and non-verbal dichotic listening test. Children were separated into two groups: experimental group with 18 dyslexic children and control group with 18 normal children. Both groups were comparable in gender, laterality and social-economic level. All dyslexic children underwent neuroimaging exam (SPECT). Our data showed that there was a statistical difference between both groups in all DL tests. Abnormal SPECT findings were seen in 50% of the dyslexic children, hypoperfusion of the left temporal lobe being the most frequent abnormality. We conclude that dyslexic children present an impairment of central neurologic processing that may be detected by DL tests, and by functional imaging exam, such as SPECT, as well.64110811

Avaliação neuropsicológica de crianças após doença cerebrovascular isquêmica

The purpose of this study is to associate neuropsychological evaluation with neuroimaging results in children with cerebral tomography indicating ischemic cerebrovascular disease (ICVD). Neuroimaging, neurological exams and neuropsychological instruments were used to evaluate five children. The study revealed that the cognitive and perceptive skills in two children were normal and motor sequele in four cases. The rhythm, visual and speech receptive skills remained unchanged. In four cases the SPECT exam showed regions with hypoperfusion and in four cases the EEG was normal. Neuropsychological, neurological and image indication some degree of sequele demonstrating the importance of follow up of children who had suffered cerebrovascular disease.Este estudo teve como objetivo relacionar os dados da avaliação neuropsicológica com exames de neuroimagem em crianças com doença cerebrovascular isquêmica (DCVI) comprovada pela tomografia de crânio. Foram avaliadas cinco crianças através de instrumentos neuropsicológicos, exame neurológico e neuroimagem. O estudo revelou habilidades cognitivas e perceptivas preservadas em duas crianças e sequela motora em quatro. Não houve alterações nas habilidades de ritmo, visual e fala receptiva. SPECT apresentou regiões com hipoperfusão em quatro casos e EEG normal em quatro. Constatou-se comprometimento sequelar neuropsicológico, neurológico e de imagem; o trabalho mostrou a importância do acompanhamento de crianças pós distúrbio cerebral vascular.38638

Study Of Candidate Genes For Dyslexia In Brazilian Individuals.

Dyslexia or reading disability (RD) is the most common childhood learning disorder and a significantly heritable trait. Many recent studies have investigated the genetic basis of dyslexia, and several candidate genes have been proposed. Among these, DCDC2 and KIAA0319 have emerged as the strongest candidate genes for dyslexia; however studies have not provided uniformly supportive results. The aim of this study was to assess the contribution of proposed candidate genes to the molecular etiology of dyslexia in a Brazilian sample. Large deletions and duplications in the candidate genes DCDC2, KIAA0319, and ROBO1 were investigated in 51 dyslexic subjects. Furthermore, a family-based association study was performed to investigate whether associations observed in other populations with variants in the DCDC2 and KIAA0319 genes were reproducible in Brazilian dyslexic individuals. Our analysis did not detect any deletions or duplications in the genes studied, and we found no evidence that the allelic variants in the two candidate genes were significantly associated with RD in our sample. Our data do not support a role of the DCDC2/KIAA0319 locus in influencing dyslexia as a categorical trait. Given the genetic complexity of dyslexia, it is plausible that both genes contribute to an increased risk, but the relative influence of these 2 genes on RD varies in different study samples, and/or depends on analytical approaches.125356-6

Parenting Self-Efficacy Scale for Autism Spectrum Disorder: Evidence of Content Validity

The diagnosis of autism spectrum disorder (ASD) requires changes in the organization of the family routine and in the educational practices employed by their parents or caregivers, due to the characteristics of this condition. In this context, it is important to include them in the child's treatment and de-velopment process, and, therefore, to assess the variables associated with specific parenting practices for ASD, with the construct of parental self-efficacy being one of the most relevant. Thus, the aim of the present study was to investigate the evidence of content validity of the Parenting Self-Efficacy Scale for Autism Spectrum Disorder (PSES-ASD). The methodo-logical procedures consisted of analysis by expert judges (n = 5) and seman-tics with parents (n = 10). The first version of the PSES-ASD, which had 40 items, after analysis by judges and semantic analysis, became composed of 27, divided into five categories: basic needs and activities of daily living (five items), socialization (seven items), cognitive development (two items), structure and discipline (six items), and treatment/school care (seven items). The results of the analyzes showed that the PSES-ASD items are clear, theoretical, and practically relevant, and adequate to the reality of parents of children with ASD. Therefore, it can be concluded that the PSES-ASD was successful in its construction and presented satisfactory content validity evidence according to the psychometric literature