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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
81

Revitalizační program Cellulite - dermopanniculosis deformans a jeho ověření v praxi / Revitalization program Cellulite - dermopanniculosis deformans and its verification in practice.

ŠPINDLEROVÁ, Martina January 2013 (has links)
Diploma thesis deals with developing and testing of revitalization program which has positive effect on Cellulite-dermopanniculosis deformans. The research presents and evaluates results of revitalization program which took 6 months. Analysis of technical terms, that are closely related to cellulite, is presented in the theoretical part. There are presented views of Czech and foreign experts who deal with issues of cellulit. At the end of theoretical part we focused on available revitalizing methods that are aiming to elliminate cellulit. Experimental investigation was carried out on 60 women who were divided into experimental and control groups. Results are statisticaly processed in the form of graphs and tables and acompanied with discussion.
82

Altos niveis de expressao de hormonio de crescimento de camundongo em queratinocitos humanos visando a obtencao de um modelo animal de terapia genica

ROSAURO, CRISTIANE W. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:48:55Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:01:11Z (GMT). No. of bitstreams: 1 09618.pdf: 4753745 bytes, checksum: f0c21d288bbe1bd9370a02c1b417d561 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP / FAPESP:00/08457-0
83

Modelo de radionecrose cutânea induzida em camundongos nude (Nu/Nu) para desenvolvimento de terapias regenerativas baseadas em substitutos dermo-epidérmicos humanos / Radionecrosis skin model induced an athymic mouse nude (Nu/Nu) for development of dermal-epidermal human substitute based regenerative therapy

MOSCA, RODRIGO C. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:42:34Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:01:43Z (GMT). No. of bitstreams: 0 / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
84

Secrecao de hormonio de crescimento de camundongo por queratinocitos humanos primarios: perspectivas para um modelo animal de terapia genica cutanea / Secretion of mouse growth hormone by transduced primary human keratinocytes: prospects for an animal model of cutaneous gene therapy

CECCHI, CLAUDIA R. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:55:09Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:05:55Z (GMT). No. of bitstreams: 0 / Dissertação (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
85

Altos niveis de expressao de hormonio de crescimento de camundongo em queratinocitos humanos visando a obtencao de um modelo animal de terapia genica

ROSAURO, CRISTIANE W. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:48:55Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:01:11Z (GMT). No. of bitstreams: 1 09618.pdf: 4753745 bytes, checksum: f0c21d288bbe1bd9370a02c1b417d561 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP / FAPESP:00/08457-0
86

Modelo de radionecrose cutânea induzida em camundongos nude (Nu/Nu) para desenvolvimento de terapias regenerativas baseadas em substitutos dermo-epidérmicos humanos / Radionecrosis skin model induced an athymic mouse nude (Nu/Nu) for development of dermal-epidermal human substitute based regenerative therapy

MOSCA, RODRIGO C. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:42:34Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:01:43Z (GMT). No. of bitstreams: 0 / A incidência de neoplasias tem aumentado expressivamente nos últimos anos e o contínuo crescimento populacional, bem como seu envelhecimento, aumentará de forma significativa a estatística desta enfermidade nas doenças mundiais. O tratamento das neoplasias geralmente consiste do uso singular ou combinado entre a quimioterapia, cirurgia e radioterapia dependendo da etiologia do tumor. Nos casos onde a radioterapia é empregada, além dos efeitos terapêuticos da radiação, podem ocorrer complicações específicas e, na pele, estas complicações podem se apresentar com uma expressão clínica que varia desde o eritema cutâneo até a radionecrose, sendo este ultimo o efeito adverso com maior gravidade. O tratamento para a radionecrose consiste no desbridamento das áreas necróticas e recobrimento do leito cirúrgico. Os enxertos autólogos são mais comumente usados para este recobrimento, entretanto quando grandes áreas são afetadas, os aloenxertos são uma alternativa de tratamento oclusivo e ainda, com a adição de queratinócitos e células mesenquimais derivadas da gordura (ADSC), torna-se uma alternativa por seu conhecido papel imunomodulatório e regenerativo. Neste sentido, visando simular os efeitos adversos da radionecrose, foi criado um modelo animal de radionecrose cutânea induzida em camundongos Nude (Nu/Nu) para o desenvolvimento de terapias regenerativas baseadas em substitutos dermoepidérmicos humanos contendo, queratinócitos e ADSC, que se mostrou eficiente como tratamento oclusivo. Além disso, com este modelo animal de radionecrose estabelecido, novas possibilidades de tratamento de enfermidades envolvendo regeneração cutânea, podem ser testadas. / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
87

Secrecao de hormonio de crescimento de camundongo por queratinocitos humanos primarios: perspectivas para um modelo animal de terapia genica cutanea / Secretion of mouse growth hormone by transduced primary human keratinocytes: prospects for an animal model of cutaneous gene therapy

CECCHI, CLAUDIA R. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:55:09Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:05:55Z (GMT). No. of bitstreams: 0 / Queratinócitos são um veículo bastante atrativo para a transferência gênica ex vivo e liberação sistêmica uma vez que as proteínas secretadas por estas células podem atingir a circulação via um mecanismo similar ao processo natural. Um eficiente vetor retroviral (LXSN) contendo o gene do hormônio de crescimento de camundongo (mGH) foi utilizado para transduzir queratinócitos humanos primários. Os queratinócitos transduzidos apresentaram um nível de secreção in vitro alto e estável atingindo até 11 g mGH/106 células/dia. Os epitélios formados por estes queratinócitos geneticamente modificados apresentaram, porém, uma queda na taxa de secreção > 80 % quando foram retirados da placa de cultura utilizando um procedimento clássico. A substituição desta metodologia clássica por uma cultura organotípica resolveu completamente este problema. Camundongos anões imunodeficientes (lit/scid) implantados com estes enxertos organotípicos foram acompanhados durante 4 meses, e apresentaram um aumento de peso significativo (P<0,05) nos primeiros 40 dias. Níveis circulatórios de mGH atingiram um pico de 21 ng/mL 1 h após o implante, mas estes níveis rapidamente atingiram níveis basais (~2 ng/mL). Os queratinócitos humanos primários apresentaram portanto altos níveis de expressão in vitro e os maiores níveis circulatórios, porém por um breve período de tempo, reportados até o momento para GH neste tipo de células. Em conjunto com resultados que mostraram uma recuperação considerável da eficiência de secreção de mGH em cultura por enxertos organotípicos retirados dos animais, foram discutidos os fatores que ainda impedem a utilização clínica deste modelo promissor de terapia gênica cutânea. / Dissertação (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
88

Proteínas do Tegumento de Abelhas Apis mellifera em Metamorfose: Identificação por Espectrometria de Massa / Integument Protein of Honeybee Apis mellifera under Metamorphosis: Identification by Mass Spectrometry

André Fernando Ditondo Micas 19 December 2012 (has links)
Como qualquer inseto holometábolo, a abelha Apis mellifera sofre metamorfose completa, apresentando grandes mudanças na forma e fisiologia quando passa do estágio larval para o estágio de pupa (muda metamórfica). Após esta muda, com o prosseguimento do desenvolvimento, o tegumento pupal (cutícula e a epiderme subjacente), extensivamente remodelado, é substituído pelo tegumento adulto, definitivo, que passa por intensa melanização e esclerotização. Eletroforese bidimensional e espectrometria de massas foram utilizadas neste trabalho para caracterizar as mudanças do padrão proteico no tegumento em desenvolvimento de operárias e zangões. No total foram identificadas 51 proteínas diferentes no tegumento torácico extraído de larvas, pupas e adultos (adultos-faratos). Quatorze proteínas foram identificadas como genuinamente cuticulares: Apidermina-3,1-like, Apidermina-2, Cuticular proteins analogous to peritrophins-3C e 3D, AmelCPR3, 12, 16 e 27, Glicoproteína SgAbd-2-like, e cinco outras proteínas homólogas à proteínas cuticulares de outras espécies de insetos contendo um domínio de ligação à quitina. As proteínas diferiram principalmente quantitativamente entre as fases de desenvolvimento e sexo, e poucas diferenças qualitativas foram observadas. Por exemplo, Apidermina-2 é típica de tegumentos fortemente esclerotizados e pigmentados. As diferenças quantitativas foram destacadas pela comparação da abundância de algumas proteínas e seus respectivos RNA mensageiros (utilizando RT-PCR em tempo real) entre as fases de desenvolvimento e entre os sexos. Várias proteínas cuticulares mostraram mais de uma forma molecular, aparentemente derivadas de modificações pós-traducionais. Além de conferir suporte experimental para a validação de genes de A. mellifera preditos, ou não-anotados, nossos dados forneceram novas informações sobre as proteínas que atuam no tegumento em desenvolvimento. / As a holometabolous insect, the honey bee undergoes complete metamorphosis, displaying a marked change in shape and physiology when passing from the larval to the pupal stage (metamorphic molt). As development progresses, the extensively remodeled pupal integument (cuticle and subjacent epidermis) is replaced by the adult integument, which undergoes intense sclerotization and melanization. Two-dimensional electrophoresis and mass spectrometry were here used to characterize the changing protein patterns in the developing integument of workers and drones. Overall, we identified 51 different proteins in the thoracic integument extracted from larvae, pupae and adults (pharate adults). Fourteen proteins were identified as genuine cuticular proteins: Apidermin-3,1-like protein, Apidermin-2, Cuticular Proteins Analogous to Peritrophins-3C and 3D, AmelCPR3, 12, 16 and 27, Glycoprotein SgAbd-2-like, and 5 other proteins homologous to cuticular proteins from other insect species, and containing the chitin-binding domain. Integument proteins mainly differed quantitatively among the developmental stages and sexes, although few qualitative differences have also been detected. For example, Apidermin-2 is typical of the heavily pigmented and sclerotized integument. The quantitative differences were highlighted by comparing the levels of some of these proteins and their respective mRNAs (using RT-qPCR) among the developmental phases and between sexes. It is noteworthy that several cuticle proteins showed more than one molecular form, apparently derived from post-translational modifications. In addition to give experimental support for validation of predicted, or unannotated, honey bee genes, our data provided new information on proteins acting in the metamorphosing integument.
89

Avaliação global de transcritos associados ao envelhecimento da epiderme humana utilizando microarranjos de DNA = Global evaluation of transcripts associated to human epidermal aging with DNA microarrays / Global evaluation of transcripts associated to human epidermal aging with DNA microarrays

Lorencini, Márcio, 1981- 24 August 2018 (has links)
Orientador: Nilson Ivo Tonin Zanchin / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia / Made available in DSpace on 2018-08-24T14:29:49Z (GMT). No. of bitstreams: 1 Lorencini_Marcio_D.pdf: 16348273 bytes, checksum: 4ed299b197892b0d3297e6e6a65d947c (MD5) Previous issue date: 2014 / Resumo: Com o aumento do tempo de vida da população humana muitas modalidades médicas, incluindo a dermatologia, deparam-se com uma revolução na forma de garantir saúde e qualidade de vida aos pacientes. Em contato com o ambiente externo, a pele representa um órgão no qual as mudanças com o envelhecimento causam danos funcionais, além de potencial impacto estético e psicossocial. A epiderme, camada mais externa da pele, constitui uma barreira seletiva com destacada capacidade de renovação e manutenção da homeostasia corporal. Entretanto, o entendimento de diversos mecanismos associados à fisiologia e envelhecimento da epiderme permanece como desafio para a comunidade científica. Com base nesse cenário, o objetivo do presente trabalho foi compreender o atual estado da arte no tema de envelhecimento da epiderme e realizar experimentos voltados para lacunas existentes, com foco na integração de aspectos clínicos, fisiológicos, morfológicos, celulares e moleculares. O capítulo de abertura descreve uma avaliação global de transcritos associados ao envelhecimento da epiderme humana, com a técnica de microarranjos de DNA e coleta não invasiva com fitas adesivas. O estudo indica características moleculares específicas do fotoenvelhecimento epidermal, com alterações relevantes e complementares a dados clínicos e morfológicos prévios, como modulação das vias de organização do citoesqueleto de actina e sinalização de cálcio, expressão gênica alterada de proteínas do envelope córneo, e avaliação de um painel segmentado por décadas de vida que sugere aspectos inéditos de regulação homeostática da epiderme, além de genes com modulação contínua ao longo das idades. O segundo capítulo compara o envelhecimento nas regiões folicular e interfolicular da epiderme. Como um sistema biológico de simples obtenção e fácil manuseio, os bulbos dos folículos pilosos representam uma fonte rica de material epidermal distinto, conforme evidencias na ampla modulação gênica diferenciada. O terceiro capítulo inclui uma avaliação in vitro do envelhecimento da epiderme, com queratinócitos de indivíduos de diferentes idades cultivados em monocamada e no modelo de pele equivalente. Os resultados evidenciam diferenças na expressão de marcadores moleculares de proliferação e diferenciação entre queratinócitos neonatais e adultos, mas não entre adultos de diferentes idades. Não houve diferença nas populações de células tronco, entretanto, observou-se aumento de células na fase proliferativa do ciclo celular em neonatos, assim como predominância de células na fase estacionária do ciclo celular em adultos mais velhos. Concluindo, os resultados obtidos no presente trabalho contribuem de forma significativa para o avanço do entendimento dos mecanismos moleculares afetados pelo avanço da idade da epiderme, possilitando a busca de novas alternativas no tratamento do envelhecimento cutâneo / Abstract: With the increase in lifetime of the human population many medical disciplines, including dermatology, are facing a revolution in the approaches to ensure healthcare and quality of life for patients. In contact with the external environment, the skin is an organ in which the changes of aging cause functional damage, in addition to potential aesthetic and psychosocial impact. Epidermis, the outermost skin layer, is a selective barrier with outstanding capacity for renewal and maintenance of the body homeostasis. However, the understanding of several mechanisms associated with skin physiology and aging remains a challenge for the scientific community. Considering this scenario, the objective of this work was to evaluate the state of the art knowledge on epidermal aging and to conduct experimental approaches to cover gaps that still exist on that theme, focusing on the integration of clinical, physiological, morphological, cellular and molecular aspects of epidermis aging. The opening chapter describes a study based on global transcriptional evaluation associated with aging of the human epidermis, using DNA microarrays and noninvasive tape stripping. This study reveals molecular characteristics specific of epidermal photoaging, with relevant findings complementary to previous clinical and morphological data, such as modulation of the actin cytoskeleton and calcium signaling pathways; altered gene expression of proteins of the cornified envelope; and evaluation of a segmented panel structured by decades of life, which suggests new aspects of homeostatic regulation in the epidermis and unvails genes with continuous modulation throughout different ages. The second chapter compares the gene expression patterns of the follicular and interfollicular regions of epidermis undergoing aging. As a biological system easily sampled and handled, the bulbs of plucked hair follicles represent a rich source of distinct epidermal material, as evidenced by the wide differential gene modulation that was detected. The third chapter includes an experimental in vitro evaluation of skin aging using keratinocytes isolated from individuals of different ages and cultured in monolayer and in skin equivalent models. Differences in the expression of proliferation and differentiation molecular markers between neonatal and adult keratinocytes were observed. No differences were found regarding the stem cell populations, however, neonates showed an increased percentage of cells in the proliferative phase of cell cycle, while older adults presented a predominance of cells in the stationary phase of cell cycle. The results herein presented provide novel insights on the molecular mechanisms affected by epidermal aging, enabling the search of new alternatives in the treatment of aging skin / Doutorado / Genetica Animal e Evolução / Doutor em Genetica e Biologia Molecular
90

Etude de la variabilité génétique de la sensibilité à la pourriture brune au cours du développement du fruit chez la pêche en lien avec l’évolution des caractéristiques physiques et biochimiques du fruit / Study of the genetic variability of peach in susceptibility to brown rot during fruit development in relation with changes in physical and biochemical characteristics of the fruit

De Oliveira Lino, Leandro 15 November 2016 (has links)
La pourriture brune des fruits (BR), causée par les champignons du genre Monilinia, est une maladie courante qui peut provoquer jusqu’à 40% de pertes de récolte chez la pêche. Toutes les pêches cultivées sont plus ou moins sensibles à la moniliose. Aucune alternative aux traitements chimiques n’est disponible, ce qui rend nécessaire les applications de fongicides jusqu'au stade pré-récolte, qui sont préjudiciables pour l'environnement et peuvent laisser des résidus sur les fruits. Une revue de la littérature compile les connaissances disponibles sur le couple pêcher-monilioses.Le but de cette étude est d'étudier les facteurs de résistance du fruit à M. laxa à différents stades de croissance chez la pêche et de déterminer leur contrôle génétique.Nous avons focalisé d’abord sur quelques cultivars pour étudier l'évolution de la sensibilité des fruits à M. laxa au cours de leur développement en relation avec les caractéristiques structurales et biochimiques des fruits (conductance cuticulaire du fruit, micro-fissures de l’épiderme et composés de surface des fruits). Certains composés ont été détectés pour la première fois chez la pêche. Les résultats ont confirmé que lors de la phase I les fruits immatures sont sensibles à la moniliose. Au stade de durcissement du noyau, les fruits sont résistants, la conductance cuticulaire faible et les niveaux de composés de surface présentaient un pic de teneurs. A l’approche de la maturité, les fruits sont sensibles de nouveau. Au stade I, nous avons exploré le rôle des stomates et de la conductance du fruit immature en relation avec la sensibilité à M. laxa. Une centaine de génotypes d'une descendance interspécifique de pêchers appelée BC2 a été caractérisée par une infection au laboratoire, un suivi de pertes transpiratoires des fruits et une estimation de la densité de stomates (uniquement pour les nectarines). Des symptômes inattendus (une ‘tache claire’ qui ne progresse pas) ont été observés. La conductance cuticulaire était significativement liée à la probabilité d'infection, mais le nombre de stomates n’a montré aucun effet sur la probabilité d'infection. Des QTL contrôlant la résistance des fruits à la moniliose, à la conductance cuticulaire et au nombre de stomates ont été identifiés et des co-localisations observées.A maturité, le contrôle génétique de la résistance à la moniliose et des composés biochimiques de l'épiderme des fruits a été étudié. Pendant trois ans, les fruits de la BC2 ont été infectés avec une suspension de spores de champignon selon deux modalités. La BC2 a affiché une forte variabilité de résistance à la moniliose. Malgré une faible stabilité entre les années, des génotypes à haut niveau de résistance ont été identifiés. De plus en 2015, nous avons exploré la variation des composés de l'épiderme des fruits au sein de la BC2. Les composés phénoliques, les terpènes et dérivés ont été quantifiés par HPLC. La relation entre la résistance à la moniliose et la présence et / ou les niveaux de certains composés de l'épiderme et le contrôle génétique de ces composés ont été étudiés.La moniliose des fruits de pêche est un problème complexe qui est encore loin d'être résolu. Des progrès ont été accomplis dans la connaissance des caractéristiques structurales et biochimiques impliquées dans la résistance et des régions du génome qui pourraient conférer une certaine tolérance à la maladie ont été détectées. Des travaux supplémentaires sont nécessaires pour développer des marqueurs moléculaires pour la sélection assistée par marqueurs. Les résultats obtenus suggèrent que des solutions pour l'avenir résident dans l’association de cultivars tolérants _ moins sensibles aux micro-fissures et à haute teneur en composés épidermiques potentiellement inhibiteurs du développement du champignon _ avec des pratiques culturales réduisant les risques de fissuration des fruits et d'apparition de conditions climatiques favorables à la propagation de la moniliose. / Brown rot (BR) in peach fruit caused by the fungus Monilinia spp. is a common disease that can provoke as much as 30 to 40% losses of crop. Currently, all cultivated peaches are more or less sensitive to BR. No other alternative than chemical treatment is available, hence fungicide applications are required until pre-harvest. Such applications are damaging the environment and may let residues in fruits. A review of literature was accomplished to compile the knowledge scattered in the literature from many years. The aim of this study is to investigate the factors of resistance of the fruit to M. laxa at different stages of fruit growth and their genetic control by studying contrasted genotypes and an interspecific peach progeny. The first focus was made on few cultivars to study the evolution of sensibility of fruits to M. laxa during their development in relation with structural and biochemical characteristics of the fruit, e.g. cuticular conductance, micro-cracks and fruit surface compounds. Some compounds were detected for the first time on peach fruit. The results confirmed that during the stage I immature fruits are susceptible to BR. Fruit cuticular conductance was high probably due to high density of stomata and thin cuticule in formation. In contrary, at pit hardening stage fruits were resistant, cuticular conductance was low and the levels of surface compounds exhibit a peak. When maturity approaches, fruit become susceptible again. With rapid development of the fruit during this stage, the surface compounds were diluted and micro-cracks often appear which resulted in high cuticular conductance. At stage I we explored the different physical characteristics of the immature fruit in relation with susceptibility to M. laxa. A hundred of individuals of an interspecific peach progeny called BC2 were characterized through laboratory infection, monitoring of fruit transpiratory losses and estimating stomata density (only for nectarines). Unexpected symptoms (not progressing ‘clear spot’) were observed. The cuticular conductance was significantly linked to the likelihood of infection, but the stomata number had no effect on the likelihood of infection. QTL controlling fruit resistance to BR, cuticular conductance and stomata number have been identified and some co-locations observed. At maturity stage we investigated the genetic control of BR resistance together with biochemical compounds of fruit epidermis. For three years, mature fruits from the BC2 progeny were infected with two modalities of infection: spray until runoff in the orchard to measure infection probability and drop in the laboratory conditions in order to observe the characters of beginning, progression and speed of infection. The BC2 progeny displayed high variability for BR resistance. Despite low stability between years, genotypes with high level of resistance were identified. In addition in 2015, we explored the variation in epidermis compounds of fruit within the BC2 progeny. Phenolic compounds, terpenoids and derivatives were quantified by HPLC. The relationship between BR resistance and presence and/or levels of certain epidermis compounds and the genetic control of these compounds were investigated. BR of peach fruit is a complex problem which is still far from resolved. Progress has been made in the knowledge of structural and biochemical characteristics involved in BR resistance and regions of the genome that could confer certain disease tolerance have been detected. Further work is needed to develop molecular markers for marker assisted selection. The results obtained suggest that solutions for the future lie in associations of tolerant cultivars _ less susceptible to micro-cracks and with high content of epidermis compounds potential inhibitor of the fungus development _ with cultural practices reducing both risks of fruit cracking and occurrence of micro-climatic conditions favorable to BR spread and sporulation.

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