Whole transcriptome analysis of the hippocampus: toward a molecular portrait of epileptogenesis

<p>Abstract</p> <p>Background</p> <p>Uncovering the molecular mechanisms involved in epileptogenesis is critical to better understand the physiopathology of epilepsies and to help develop new therapeutic strategies for this prevalent and severe neurological condition that affects millions of people worldwide.</p> <p>Results</p> <p>Changes in the transcriptome of hippocampal cells from rats subjected to the pilocarpine model of epilepsy were evaluated by microarrays covering 34,000 transcripts representing all annotated rat genes to date. Using such genome-wide approach, differential expression of nearly 1,400 genes was detected during the course of epileptogenesis, from the early events post <it>status epilepticus (SE) </it>to the onset of recurrent spontaneous seizures. Most of these genes are novel and displayed an up-regulation after <it>SE</it>. Noteworthy, a group of 128 genes was found consistently hyper-expressed throughout epileptogenesis, indicating stable modulation of the p38MAPK, Jak-STAT, PI3K, and mTOR signaling pathways. In particular, up-regulation of genes from the TGF-beta and IGF-1 signaling pathways, with opposite effects on neurogenesis, correlate with the physiopathological changes reported in humans.</p> <p>Conclusions</p> <p>A consistent regulation of genes functioning in intracellular signal transduction regulating neurogenesis have been identified during epileptogenesis, some of which with parallel expression patterns reported in patients with epilepsy, strengthening the link between these processes and development of epilepsy. These findings reveal dynamic molecular changes occurring in the hippocampus that may serve as a starting point for designing alternative therapeutic strategies to prevent the development of epilepsy after acquired brain insults.</p

Evaluation of physical educators' knowledge about epilepsy Avaliação do conhecimento de professores de educação física sobre epilepsia

People with epilepsy suffer from a considerable lack of physical activity. In addition, an important problem of epilepsy management is the lack of qualified professionals. In this study we present data from a survey which aimed to assess physical educators' general knowledge about epilepsy. One hundred and thirty four physical educators of both sexes answered a questionnaire. Sixty percent of the professionals believe that a seizure is an abnormal electrical discharge of the brain, 13% that epilepsy is a cerebral chronic disease that can not be cured or controlled, 84% that people having convulsions will not necessarily present epilepsy and 5% that people with epilepsy have difficulties of learning. Questions concerned previous professional experience with epilepsy showed that 61% have seen a seizure and 53% have access to some information about epilepsy. Thus, 28% of professionals have a friend or relative with epilepsy, 14% have a student with epilepsy, and 29% helped someone during seizures. Our findings reveal a lack of physical educators' appropriate knowledge about epilepsy. Improvement of this might contribute to the improvement of epilepsy care/management.<br>Pessoas com epilepsia apresentam baixa participação em atividades físicas. Um importante problema nos cuidados da epilepsia é a falta de profissionais qualificados. Neste estudo apresentamos dados de uma pesquisa para avaliar o conhecimento de professores de educação física sobre a epilepsia. Um questionário foi respondido por 134 educadores físicos de ambos os sexos. Sessenta por cento dos profissionais acreditam que a crise epilética é uma descarga elétrica anormal do cérebro, 13% que a epilepsia é uma doença crônica cerebral que não pode ser curada ou controlada, 84% que pessoas que têm convulsões não necessariamente apresentam epilepsia e 5% que pessoas com epilepsia têm dificuldade de aprendizado. Em relação à experiência prévia do profissional, 61% presenciaram uma crise epilética e 53% tiveram acesso a alguma informação sobre epilepsia. Além disso, 28% dos profissionais possuíam amigo ou parente com epilepsia, 14% tinham um aluno com epilepsia e 29% já tinham socorrido alguém durante uma crise. Nossos achados revelam uma falta de conhecimento apropriado dos profissionais da área de educação física sobre a epilepsia. A melhora desse conhecimento pode contribuir para um adequado tratamento e cuidado da pessoa com epilepsia