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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.
1

Paranuclear Blue Inclusions: An Aid in the Cytopathologic Diagnosis of Primary and Metastatic Pulmonary Small‐cell Carcinoma

Mullins, Rejeana K., Thompson, Sophie K., Coogan, Philip S., Shurbaji, M. Salah 01 January 1994 (has links)
Accurate diagnosis of small‐cell carcinoma of the lung (SCLC) is clinically important because of the therapeutic implications. SCLC must be distinguished from non‐small‐cell carcinoma (NSCLC) and lymphoma. Paranuclear blue inclusions (PBIs) were recently described as a feature of metastatic SCLC on air‐dried Wright‐stained bone marrow aspirate smears. To determine the utility of PBIs in distinguishing SCLC from NSCLC and lymphoma, we evaluated air‐dried Diff‐Quik‐stained smears from 103 fine‐needle aspiration (FNA) specimens and 14 touch imprint specimens. PBIs were identified in 24 (89%) of 27 cases of SCLC, in 6 (9%) of 64 non‐small‐cell carcinomas (P < 0.00001), and in two (8%) of the 26 lymphoma cases (P < 0.00001). No PBIs were seen on any of the alcohol‐fixed Papanicolaou or hematoxylin‐eosin (HandE) stained smears examined. In conclusion, PBIs appear to be a feature of SCLC on air‐dried cytologic material stained with Romanowsky type stains. In the presence of cytologic features of SCLC, the identification of PBIs provides a useful diagnostic feature for diferentiating between SCLC and NSCLC carcinomas, and between SCLC and lymphomas in FNA specimens and touch imprints from surgical specimens.
2

Terapia gênica do câncer associando reparo da via p53 à imunoestimulação por IFNbeta / Cancer gene therapy associated repair via p53 immunostimulation by IFNbeta

Catani, João Paulo Portela 11 September 2014 (has links)
Os avanços científicos das últimas décadas permitiram que a compreensão do câncer evoluísse de uma visão simplista, na qual o principal motor seria uma atividade celular hiperploriferativa, para uma visão mais complexa onde o estado fisiológico geral permite a gênese e progressão tumoral. Essa evolução permite o desenvolvimento de novas abordagens terapêuticas e traz novas esperanças para o tratamento de muitos tipos de cânceres ainda extremamente deletérios. Dentro desse novo panorama, terapias que estimulem a imunidade antitumoral têm se mostrado extremamente promissoras. Nesse trabalho, procuramos investigar os efeitos antitumorais desencadeados pela combinação da indução de morte celular e imunoestimulação. Para tanto, visamos à recuperação da via de p53 (pela transferência gênica do próprio p53 ou p19) associada à transferência gênica de IFNbeta. A transferência gênica foi mediada por vetores adenovirais do sorotipo 5. Nossas observações, em um modelo murino de carcinoma pulmonar, permitem concluir que esta linhagem é sensível a morte induzida pela transferência gênica de p19 e não p53. Porém, a transferência gênica intratumoral de IFNbeta se mostrou chave no controle do crescimento do tumor primário. Destacamos, entretanto, que a associação de IFNbeta com p19 produziu efeitos imunoprotetores superiores à transferência de IFNbeta ou p19 sozinhos. Tal efeito parece ser dependente da indução de fatores quimiotáxicos e conseqüente recrutamento de neutrófilos para o sítio tumoral. O efeito da transferência gênica combinada de ambos os genes IFNbeta e p19 se mostrou ainda mais promissor quando associado à cisplatina, induzindo uma notável redução no crescimento tumoral / Scientific advances from the last decades enabled the evolution of our knowledge of cancer from a simplistic vision, in which the main motor was an excessive cell proliferation, to a more complex one, where the general physiologic state enables tumorigenesis and tumor progression. This evolution enabled the development of new therapies and brings new hopes for the treatment of several types of cancers. In this context, therapies that induce an antitumor immunity are very promising. In this work, we are investigating the antitumor effects triggered by the combination of cell death induction and immunostimulation. To this end, we aimed to restore p53 pathway (by p53 or p19 gene transfer) associated with immunostimulation by IFNbeta gene transfer. The gene transfer was mediated by Adenovectors Serotype 5. Our observations in a murine model of lung cancer showed that this cell line is sensitive to cell death induced by p19 gene transfer, but not p53. Nevertheless, intratumoral gene transfer of IFNbeta, was crucial in controlling tumor growth. Moreover, p19 and IFNbeta association induced higher immunoprotecting effects than p19 or IFNbeta alone. This effect seems to be depending on the induction of chemotactic factors, and the recruitment of neutrophils to the tumor site. The effect of combined gene transfer of p19 and IFNbeta was even more promising when associated with Cisplatine, inducing a remarkable reduction in tumor growth
3

Contribution à l'étude par TDM du retentissement sur le coeur gauche de la pathologie pulmonaire. / Contribution in computed tomography of impact on the left heart of pulmonary diseases.

Cassagnes, Lucie 16 December 2016 (has links)
La pathologie pulmonaire et la pathologie cardiaque interagissent et le bloc “Cœur- poumon” est à considérer comme une seule et même entité en imagerie: la lecture du cœur, des vaisseaux, des poumons et du médiastin doit être globale et intégrée, quelle que soit la modalité d’imagerie. Nous avons pu ainsi illustrer la contribution de la TDM dans l’évaluation de la prévalence de la pathologie coronarienne asymptomatique au cours de la fibrose pulmonaire idiopathique, l’analyse du volume de l’oreillette gauche au cours des BPCO, la corrélation entre volume pulmonaire hypoperfusé et le rapport VD/VG, et l’évaluation de l’envahissement cardiaque au cours des néoplasies pulmonaires. Les avancées techniques en scannographie nous permettent désormais d’approcher outre la morphologie le versant fonctionnel, notamment par l’évaluation de la fonction cardiaque, de la perfusion pulmonaire, en attendant le développement en routine clinique de l’approche par TDM de la fonction de ventilation. Notre thèse avait pour ambition de contribuer modestement à la promotion d’une approche morphologique et fonctionnelle intégrée de l’imagerie du cœur, des vaisseaux thoraciques et du poumon, dont les bénéfices cliniques nous apparaissent quotidiens et dont l’enseignement nous apparait indissociable. / Pulmonary and cardiac pathology interact and the « heart-lung » bloc is to consider as one and same entity in imaging: heart, vessels, lungs and mediastinum analysis must be global and integrated, whatever imaging modality.In this work, we have illustrated computed tomography contribution in: evaluating asymptomatic coronary disease in cystic fibrosis pathology, left atrial volume in COPD patients, correlation of hypo perfused lung volume and RV/LV ratio, and cardiac invasion evaluation in broncho-pulmonary neoplasm.Computed tomography technological advances allow us to evaluate morphology and functional side, in evaluating cardiac function, pulmonary perfusion, waiting for the development of pulmonary ventilation in routine. Our work contributes to the development of a morphological and functional approach in heart, great vessels and lung imaging.
4

Terapia gênica do câncer associando reparo da via p53 à imunoestimulação por IFNbeta / Cancer gene therapy associated repair via p53 immunostimulation by IFNbeta

João Paulo Portela Catani 11 September 2014 (has links)
Os avanços científicos das últimas décadas permitiram que a compreensão do câncer evoluísse de uma visão simplista, na qual o principal motor seria uma atividade celular hiperploriferativa, para uma visão mais complexa onde o estado fisiológico geral permite a gênese e progressão tumoral. Essa evolução permite o desenvolvimento de novas abordagens terapêuticas e traz novas esperanças para o tratamento de muitos tipos de cânceres ainda extremamente deletérios. Dentro desse novo panorama, terapias que estimulem a imunidade antitumoral têm se mostrado extremamente promissoras. Nesse trabalho, procuramos investigar os efeitos antitumorais desencadeados pela combinação da indução de morte celular e imunoestimulação. Para tanto, visamos à recuperação da via de p53 (pela transferência gênica do próprio p53 ou p19) associada à transferência gênica de IFNbeta. A transferência gênica foi mediada por vetores adenovirais do sorotipo 5. Nossas observações, em um modelo murino de carcinoma pulmonar, permitem concluir que esta linhagem é sensível a morte induzida pela transferência gênica de p19 e não p53. Porém, a transferência gênica intratumoral de IFNbeta se mostrou chave no controle do crescimento do tumor primário. Destacamos, entretanto, que a associação de IFNbeta com p19 produziu efeitos imunoprotetores superiores à transferência de IFNbeta ou p19 sozinhos. Tal efeito parece ser dependente da indução de fatores quimiotáxicos e conseqüente recrutamento de neutrófilos para o sítio tumoral. O efeito da transferência gênica combinada de ambos os genes IFNbeta e p19 se mostrou ainda mais promissor quando associado à cisplatina, induzindo uma notável redução no crescimento tumoral / Scientific advances from the last decades enabled the evolution of our knowledge of cancer from a simplistic vision, in which the main motor was an excessive cell proliferation, to a more complex one, where the general physiologic state enables tumorigenesis and tumor progression. This evolution enabled the development of new therapies and brings new hopes for the treatment of several types of cancers. In this context, therapies that induce an antitumor immunity are very promising. In this work, we are investigating the antitumor effects triggered by the combination of cell death induction and immunostimulation. To this end, we aimed to restore p53 pathway (by p53 or p19 gene transfer) associated with immunostimulation by IFNbeta gene transfer. The gene transfer was mediated by Adenovectors Serotype 5. Our observations in a murine model of lung cancer showed that this cell line is sensitive to cell death induced by p19 gene transfer, but not p53. Nevertheless, intratumoral gene transfer of IFNbeta, was crucial in controlling tumor growth. Moreover, p19 and IFNbeta association induced higher immunoprotecting effects than p19 or IFNbeta alone. This effect seems to be depending on the induction of chemotactic factors, and the recruitment of neutrophils to the tumor site. The effect of combined gene transfer of p19 and IFNbeta was even more promising when associated with Cisplatine, inducing a remarkable reduction in tumor growth

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