10 research outputs found
Biotecnologie in classe: un intervento di peer tutoring con studenti della scuola secondaria
The article presents a school project implemented in the framework of âPiano Nazionale Lauree Scientificheâ, using a Student Voice approach: a group of high school students facilitated a laboratory focused on biotechnology, playing the role of tutor for their peers. A qualitative research was carried out in order to answer to the following questions: what are the studentsâ perceptions about the teaching and learning method used, namely the peer tutoring? What are the studentsâ perceptions about the topic of biotechnology, with specific focus on GMOs and what is the impact of the laboratory experience to guide studentsâ university future choices? The research aimed at investigating strengths and the critical aspects of this project, in order to improve future editions. Findings showed that the two active learning methods used, i.e. the peer tutoring and laboratory, allowed students to experience leadership and to develop their competences, by managing a complex task with responsibility and autonomy within a teamwork.Lâarticolo presenta lâesperienza di un progetto scolastico svolto con un approccio Student Voice, in cui un gruppo di studenti liceali hanno assunto il ruolo di tutor per i propri compagni, gestendo un laboratorio sulle biotecnologie, promosso allâinterno del Piano Nazionale Lauree Scientifiche. Lâesperienza Ăš stata oggetto di una ricerca qualitativa, mossa dai seguenti interrogativi: quali sono le percezioni degli studenti in merito al metodo didattico utilizzato e cioĂš il peer tutoring? Quali sono le percezioni degli studenti in merito ai contenuti proposti, cioĂš le biotecnologie ed in particolare gli OGM, nonchĂ© il contributo dato dal laboratorio per lâorientamento alla scelta universitaria? La finalitĂ era raccogliere i punti di forza e le criticitĂ di tale esperienza per migliorare le future edizioni. Lâindagine ha confermato come i due metodi di didattica attiva utilizzati e cioĂš il peer tutoring ed il laboratorio hanno permesso ai ragazzi di fare una esperienza di protagonismo e sviluppo di competenze, in cui sono stati capaci di gestire con responsabilitĂ ed autonomia un compito complesso allâinterno di un lavoro di squadra
Biotecnologie in classe: un intervento di peer tutoring con studenti della scuola secondaria Biotechnology in the classroom: a peer tutoring experience with secondary school students
L\u2019articolo presenta l\u2019esperienza di un progetto scolastico svolto con un approccio Student
Voice, in cui un gruppo di studenti liceali hanno assunto il ruolo di tutor per i propri compagni,
gestendo un laboratorio sulle biotecnologie, promosso all\u2019interno del Piano
Nazionale Lauree Scientifiche. L\u2019esperienza \ue8 stata oggetto di una ricerca qualitativa,
mossa dai seguenti interrogativi: quali sono le percezioni degli studenti in merito al metodo
didattico utilizzato e cio\ue8 il peer tutoring? Quali sono le percezioni degli studenti in
merito ai contenuti proposti, cio\ue8 le biotecnologie ed in particolare gli OGM, nonch\ue9 il
contributo dato dal laboratorio per l\u2019orientamento alla scelta universitaria? La finalit\ue0 era
raccogliere i punti di forza e le criticit\ue0 di tale esperienza per migliorare le future edizioni.
L\u2019indagine ha confermato come i due metodi di didattica attiva utilizzati e cio\ue8 il peer tutoring
ed il laboratorio hanno permesso ai ragazzi di fare una esperienza di protagonismo
e sviluppo di competenze, in cui sono stati capaci di gestire con responsabilit\ue0 ed autonomia
un compito complesso all\u2019interno di un lavoro di squadra
PERCEPĂĂO DA POPULAĂĂO IDOSA RELATIVO AO USO E DESCARTE CORRETO DE MEDICAMENTOS
Objetivos: A pesquisa tem por objetivo conhecer os hĂĄbitos dos idosos em relação ao uso e descarte dos medicamentos visando ao mesmo tempo orientar acerca dos riscos quando os medicamentos sĂŁo incorretamente administrados/conservados. MĂ©todo: Em continuação Ă s atividades desenvolvidas nos anos anteriores, realiza-se pesquisa-ação domiciliar e palestras explicativas nas Unidades BĂĄsicas de SaĂșde, objetivando conscientizar a população idosa do municĂpio de Passo Fundo â RS, promovendo açÔes adequadas sobre o tema. Resultados: Osdados demonstram que a população idosa utiliza mais com maior frequĂȘncia medicamentos para o sistema cardiovascular(uso contĂnuo) e para o sistema mĂșsculo-esquelĂ©tico (farmĂĄcia caseira). Quanto Ă s condiçÔes de identificação/embalagem e descarte, os resultados foram satisfatĂłrios, porĂ©m, nĂŁo o armazenamento. ConclusĂŁo: Percebe-se a necessidade e a importĂąncia da educação continuada para indivĂduos dessa faixa etĂĄria, relativo ao uso, armazenamento,cuidados e descarte de medicamentos
Monoclonal antibody DL11C8 identifies ADAM23 as a component of lipid raft microdomains
A disintegrin and metalloprotease protein 23 (ADAM23) is a transmembrane type I glycoprotein involved with the development and maintenance of the nervous system, including neurite outgrowth, neuronal adhesion and differentiation and regulation of synaptic transmission. In addition, ADAM23 seems to participate in immune response and tumor establishment through interaction with different members of integrin receptors. Here, we describe a novel monoclonal antibody (DL11C8) that specifically recognizes the cysteine-rich domain of both pre-protein (100 kDa) and mature (70 kDa) forms of ADAM23 from different species, including human, rodents and avian orthologs. Using this antibody, we detected both forms of ADAM23 on the cell surface of three neuronal cell lineages (Neuro-2a, SH-SY5Y and CHLA-20), with a higher relative content of ADAM23. Furthermore, we demonstrate for the first time that a catalytically inactive member of the ADAM family is present in the membrane signaling platforms, namely lipid rafts. Indeed, the mature ADAM23 partitions between raft and non-raft membrane domains, while the pro-protein ADAM23 is mainly expressed in non-raft domains. These membranous distributions were observed in both different brain regions homogenates and primary cultured neurons lysates from mouse cortex and cerebellum. Taken together, these findings point out ADAM23 as a lipid raft molecular component
ADAM23 Negatively Modulates alpha(v)beta(3) Integrin Activation during Metastasis
The ADAM23 gene is frequently silenced in different types of tumors, and, in breast tumors, silencing is correlated with tumor progression, suggesting that it might be associated with the acquisition of a metastatic phenotype. ADAM23 exerts its function mainly through the disintegrin domain, because its metalloprotease domain is inactive. Analysis of ADAM23 binding to integrins has revealed a specific interaction with alpha(v)beta(3) integrin mediated by the disintegrin domain. Altered expression of alpha(v)beta(3) integrin has been observed in different types of tumors, and expression of this integrin in the activated form has been shown to promote metastasis formation. Here, we investigated the possibility that interaction between ADAM23 and alpha(v)beta(3) integrin might negatively modulate alpha(v)beta(3) activation during metastatic progression. ADAM23 expression was knocked down using short hairpin RNA in the MDA-MB-435 cell line, which has been extensively used as a model for alpha(v)beta(3) integrin activation. Ablation of ADAM23 enhanced alpha(v)beta(3) integrin activation by at least 2- to 4-fold and ADAM23 knockdown cells showed enhanced migration and adhesion to classic alpha(v)beta(3) integrin ligands. Ablation of ADAM23 expression also enhanced pulmonary tumor cell arrest in immunodeficient mice. To complement our findings with clinical evidence, we showed that silencing of ADAM23 gene by DNA promoter hypermethylation in a collection of 94 primary breast tumors was significantly associated with lower distant metastases-free and disease-specific survivals and was an independent prognostic factor for poor disease outcome. Our results strongly support a functional role of ADAM23 during metastatic progression by negatively modulating alpha(v)beta(3) integrin activation. [Cancer Res 2009;69(13):5546-52]FAPESP[04/09088-9