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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.
31

Efeitos da toxina botulínica do tipo A isolada ou em associação com a finasterida sobre a próstata do cão e rato Sprague-Dawley /

Mostachio, Giuliano Queiroz. January 2012 (has links)
Orientador: Wilter Ricardo Russiano Vicente / Banca: Aracélle Elisane Alves / Banca: Fabiana Ferreira de Souza / Banca: Maria Denise Lopes / Banca: Maricy Apparicio Ferreira / Resumo: A hiperplasia prostática benigna (HPB) tem início no animal com um a dois anos de idade, no entanto, sua fisiopatologia não está totalmente compreendida. O objetivo principal do tratamento da HPB é controlar o crescimento do órgão, prevenir complicações e efeitos colaterais. Desta maneira, o efeito da toxina botulínica tem sido investigado, mostrando bons resultados no homem. Com base nisso, este estudo objetivou fornecer informações acerca dos efeitos da finasterida e da TB-A no tratamento da HPB canina. Para tanto, 24 cães adultos foram divididos aleatoriamente em quatro grupos e submetidos à administração de solução fisiológica 0,9%, 5 mg de finasterida, 500 U de TB-A ou 500 U de TB-A associada a finasterida, e avaliados durante 16 semanas. Complicações locais ou alterações sistêmicas não foram observadas nos animais pertencentes aos grupos experimentais. Após 16 semanas da administração de 5 mg de finasterida o volume prostático reduziu 45,3% e ocorreu um aumento de 5 vezes nas taxa de morte celular. Comparando-se os valores do volume prostático após 16 semanas da aplicação de 500 U de TB-A ou 500 U de TB-A associada a finasterida com os valores basais, observamos uma redução de 30,9 e 51,3%, respectivamente. Neste mesmo período, ocorreu um aumento de seis e oito vezes da taxa de apoptose nos animais do grupo III e IV. Os resultados sugerem que os três protocolos terapêuticos promovem significativa redução do volume prostático e esta se deve a apoptose celular ao invés de necrose. Desta forma, o presente ensaio contribui de forma singular e inovadora para o conhecimento dos efeitos desta nova modalidade de tratamento na HPB canina / Abstract: Benign prostatic hyperplasia (BPH) starts the development in animals aging about 1 - 2 years, however, its pathophysiology is not fully elucidated. The main goal of BPH is to control the growth of the prostate, to prevent complications, and to minimize the adverse effects. Thus, the effect of botulinum toxin A (BT-A) has been investigated in humans with good results. Based on that, this study aimed to provide information about the effects of finasteride and BT-A in the treatment of BPH in dogs. For that, 24 adults dogs were randomly divided in four groups and submitted to administration of saline solution, 5 mg of finasteride, 500 of BT-A or 500 U of BT-A associated with finasteride, and evaluated along 16 weeks. Local complications and systemic effects were not observed. After 16 weeks of the application of 5 mg of finasteride the prostatic volume decreased 45,3% and occurred a 5-fold increased in the rate of cell death. Comparing the values of the prostatic volume after 16 weeks of administration of 500 U of BT-A or 500 U BT-A associated with finasteride with the baseline, a decrease of 30,9 and 51,3% were observed, respectively. In the same period, a increase of 6 and 8 times occurred in the rate of apoptosis in the animals of group III and IV. The results suggest that all 3 treatments protocols further significant reduction in the prostate volume have shown to significantly reduce the volume of prostate, and this reduction is due apoptosis instead necrosis. This way, the present study is an innovative and singular contribution for the knowledge of the effects of BT-A on canine prostate / Doutor
32

Estudo citoquimico e morfometrico em nucleos e distribuição das fibras no estroma em lesões da prostata humana

Taboga, Sebastião Roberto 19 September 1997 (has links)
Orientadores: Maria Luiza Silveira Mello, Benedicto de Campos Vidal / Tese(doutorado) - Universidade Estadual de Campinas, Instituto de Biologia / Made available in DSpace on 2018-07-22T22:01:33Z (GMT). No. of bitstreams: 1 Taboga_SebastiaoRoberto_D.pdf: 10018541 bytes, checksum: 9e8e4476731b4e33b98f8dcc0534ee08 (MD5) Previous issue date: 1997 / Resumo: Uma expressiva fração da população masculina brasileira tem sido diagnosticada com lesões na próstata ou com sintomas de prostatismo. O presente trabalho teve como objetivo a caracterização dos núcleos e da matriz extracelular, com enforque à morfologia, citoquímica, cariometria e imunocitoquímica de lesões prostáticas humanas. Foram examinadas biópsias de ressecções trans-uretrais e punção por agulha fina de um total de 26 pacientes com hiperplasia nodular prostática (HNP) e 25 pacientes com adenocarcinomas (AC) de pacientes da Região Norte do Estado de São Paulo. Dos casos acima estudados, 12 pacientes com regiões livres de comprometimento histopatológico foram considerados controles ou regiões normais (NOR). Cortes histológicos de 6-8flm de espessura foram submetidos às colorações pela hematoxilina-eosina para as análises da distribuição da cromatina e cariometria (área e perímetro nucleares e fator forma de 200 núcleos para cada paciente estudado); azul de toluidina pH 4,0 e suas variantes para estudos citoquímicos de ácidos nucléicos; Reação de Feulgen para estudo do DNA; Reação imunocitoquímica para detecção de Apoptose - Apoptag e Impregnação argêntica de Gõmõri para o estudo da matriz estracelular. Da análise das lâminas e das medidas nucleares pôde-se concluir que existem diferenças visuais, principalmente nos adenocarcinomas, onde predomina um acentuado pleiomorfismo nuclear. As diferenças cariométricas observadas, foram significativas para os valores de área e perímetro nucleares e não significativas para o fator forma, entre as três classes, utilizando-se o teste estatístico não-paramétrico de Kruskal-Wallis. Para a comparação das populações amostrais utilizou-se as medianas dos valores obtidos na cariometria, como mostra a tabela abaixo. Classes Área nuclear (m2) Perímetro nuclear (m) Fator Forma NOR 44,30 24,80 0,94 HNP 37,14 22,52 0,92 AC 60,86 29,70 0,93 valor p p=0,0001 p=0,0001 p=0,0513(ns) (ns)não significativo Entretanto, nas categorias internas da classificação dos adenocarcinomas, segundo a graduação clássica proposta por Gleason, na versão combinada e considerando apenas o primeiro dígito da graduação, não se detectaram diferenças significativas (p=O,838 para área; p=O,6076 para perímetro e p=O,9202 para fator forma). Nestas categorias vale ressaltar a grande heterogeneidade do universo amostral Assim conclui-se que os dados de morfometria não podem ser utilizados como parâmetros discriminatórios isoladamente, sem levar em. conta a histoaquitetura do tumor. Da análise dos cortes corados pelo azul de toluidina na sua variante para detecção de apoptose e da imunocitoquímica para detecção de apoptose, pôde-se concluir não serem detectadas células apoptóticas nas regiões normais e nos adenocarcinomas, mas serem detectados corpos apoptóticos nas hiperplasias, principalmente em áreas onde estaria ocorrendo a regressão do ácino hiperplástico. Isto pode sugerir que o fenômeno apoptótico seja um modulador da recuperação localizada da hiperplasia, podendo ser inclusive um parâmetro auxiliar para o acompanhamento diagnóstico durante o tratamento. Da análise dos cortes submetidos à impregnação argêntica, pôde-se concluir que as fibras colágenas na matriz extracelular do estroma prostático, em sua dinâmica supra-molecular, respondem a estímulos externos ao estroma, modificando a disposição e o grau de compactação fibrilar. Na hiperplasia nodular prostática parece não haver modificações na integridade molecular do colágeno, pois a sua afinidade pela prata e birrefringência não são alteradas. Nos adenocarcinomas com alto grau de indiferenciação, fibras colágenas finas, ramificadas e fortemente argirófilas e birrefringentes são detectadas nas regiões de proliferação tumora!. E no estroma adjacente, hospedeiro do tumor, placas hialinas de matriz extracelular sugerem degradação ou remodelação dos componentes da matriz / Abstract: An expresive fraction of the Brasilian male population has been diagnosed with prostatic lesions or presents prostatism symptons. The present work aimed at characterizing the nuclei and the extracellular matrix, emphazing the morphology, cytochemistry, kariometrics and immunocitochemistry in some human prostatic lesions. Transurethral resections and fine needle aspiration of patients presenting prostatic nodular hyperplasia (PNH - 26 cases) or adenocarcinoma (AC - 25 cases), from the north region of the São Paulo State were examined. Twelve of these cases presented regions with no histopathological alterations which were considered normal and employed as control (Ct). Six to eigth micrometers thick histological sections were stained by hematoxylin and eosin for the analysis of chromatin distribution and kariometry (nuclear area and perimeter and form factor - 200 measurements for each patient); toluidine blue at pH 4.0 and its modifications for the cytochemical study of nucleic acids; Feulgen reaction for DNA; immunocytochemistry for detection of apoptosis (Apoptag kit) and Gõmõri' s silver impregnation for study of fibrilar collagens. The analysis showed the existence of visual differences in the nuclear phenotype among the studied cases, in special in AC, which showed a amked nuclear pleomorphism. Karyometry showed significative differences in area and perimeter values but form factor, amongst the three classes, by the use of the Kruskal-Wallis non-parametric statistical testo The median values employed for comparision between the samples are shown in the table below. Classes Nuclear area (m2) Nuclear perimeter (m) F orm factor Ct 44.30 24.80 0.94 PHN 37.14 22.52 0.92 AC 60.86 29.70 0.93 P value p=0.0001 p=O.OOOl p=0.0513(ns) (ns)non-significant The different classifications of the adenocarcinomas, according to the GIeason grading, in the combined version and considering only the first grading, showed no significative differences (p=O.838 for the area, p=O.6076 for perimeter and p=O.9202 for the form factor). It is worth to refer to the Iarge heterogeneity of the nuclear popuIation. It is concluded that morphometrics cannot be used isoIatedly to discriminate prostatic Iesions, without considerations of the tumor histoarchitecture. The use of toIuidine bIue staining modification for detection ofapoptosis and the Apoptag test demonstrated the absence of apoptotic cells and in adenocarcinomas but in hyperpIasia, especially in areas of regressing hyperpIastic acina. This is suggestive that apoptosis may represent a factor invoIved in Iocalized recover of hyperpIasia and its detection is IikeIy to represent an additionaI parameter for the follow up after treatment. The anaIysis of silver impregnated tissue sections allowed for the conclusion that collagen fibers of the prostatic stroma, in their supramoIecuIar dynamics, respond to externaI stimuli, modifying their disposition and fibrillar compactation. In PNH, there is no modifications in collagen moIecuIar integrity, since the silver affinity and birefringence are similar to controIs. In AC with high degree of non-differentiation, thin and branched collagen fibers, strongIy argyrophilic and birefrlngent are detectedin regions of cell proliferation. In the adjacent stroma, host of the tumor, hya1ine pIaques are probabIe signs of matrix degradation or remodellation / Doutorado / Biologia Celular / Doutor em Ciências
33

Regulação hormonal e interações celulas-matriz extracelular na prostata ventral de ratos

Vilamaior, Patricia Simone Leite 03 August 2018 (has links)
Orientador: Hernandes Faustino de Carvalho / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia / Made available in DSpace on 2018-08-03T19:25:48Z (GMT). No. of bitstreams: 1 Vilamaior_PatriciaSimoneLeite_D.pdf: 4838973 bytes, checksum: 3b9fa7ca6417df27631c8aa6cd14dc4f (MD5) Previous issue date: 2003 / Doutorado
34

Metabolismus sarkosinu a nádorová onemocnění prostaty =:Sarcosine metabolism and prostate cancer disease /

Strmiska, Vladislav January 2019 (has links)
Prostate carcinoma is one of the most frequent cancer diseases of maturated men. Diagnose of this cancer disease is based on level of prostatic specific antigen and digital exam per rectum. However, presence of tumor, grade and stage must be examined by biopsy. This method may not to be accurate. This is the reason why are new diagnostic methods investigated, to increase the accuracy of diagnostic prostate cancer. Amino acid sarcosine is currently on of the most widely discussed biomarker, that can serve as a diagnostic biomarker for early stage detection in prostate cancer. The present work deals with the study of sarcosine metabolism in prostate cancer cell lines, mainly, but also by amino acid metabolism in cells in general. Understanding to importance of single amino acids in malignant and non-malignant cell pathways can significantly contribute to effective targeted therapy without side effect on healthy tissue. Prostate cancer cells in presence of sarcosine increase their migration potential, malignancy by increased doubling time, and concentration of sarcosine N-demethylation enzymes, sarcosine dehydrogenase and sarcosine oxidase. Through this biochemical pathway is increased synthesis of main methylation donor S-adenosilmethyonine (SAM) ad cellular methylation potential.
35

Evaluierung der Rezidivbestrahlung des Prostatakarzinoms / Evaluation of recurrent radiation therapy for prostate cancer

Zehner, Leonie Constanze January 2024 (has links) (PDF)
Es erfolgte eine Evaluierung von Bestrahlungsdaten aus der Strahlentherapie der Universitätsklinik Würzburg von 435 Patienten mit biochemischen oder klinischen Rezidiv des Prostatakarzinoms. Der primäre Endpunkt war das biochemisch rezidivfreie Überleben. Sekundäre Endpunkte waren das Auftreten von Fernmetastasen und das Versterben der Patienten. Zudem wurde der Einfluss patienten-, tumor-, und behandlungsspezifischer Faktoren überprüft. / Radiation data from radiotherapy at the University Hospital of Würzburg from 435 patients with biochemical or clinical recurrence of prostate cancer were evaluated. The primary endpoint was biochemical recurrence-free survival. Secondary endpoints were the occurrence of distant metastases and the death of the patients. In addition, the influence of patient-, tumor- and treatment-specific factors was examined.
36

Erstellung einer histologisch evaluierten Prostata-DNA-Bank aus Prostatakarzinom im Vergleich zu Normalgewebe / Production of a histologic evaluated prostate gland DNA – database from prostate gland cancer in comparison to normal tissue

Elflein, Florian January 2010 (has links) (PDF)
In dieser Arbeit wurde die Etablierung und Charakterisierung einer großen Daten-, Gewebe- und DNA-Bank an einem Kollektiv von 311 Patienten mit Prostatakarzinom und bekanntem klinischem Follow-up mit einem Beobachtungszeitraum von im Durchschnitt 5 Jahren beschrieben. Sämtliche Fälle wurden von einem Beobachter einheitlich nach einem standardisierten Katalog re-klassifiziert. Die erhobenen Daten konnten durch Korrelation mit den klinischen Verläufen auf Plausibilität überprüft und dadurch validiert werden. Die untersuchten Fälle entsprachen bezüglich Häufigkeitsverteilung in Tumorstadium und Gleason-Grading den aus Literaturangaben zu erwartenden Häufigkeiten. Statistisch signifikante Risikofaktoren bezüglich eines Tumorrezidivs, das hier als postoperativer Wiederanstieg des PSA im Serum definiert wurde, waren ein hohes Tumorstadium, hoher Gleason-Score, extraprostatische Perineuralscheideninfiltrate und unvollständige Resektion, während der Nachweis von Lymphknotenmetastasen zum Zeitpunkt der Operation innerhalb des hier verfügbaren Nachbeobachtungszeitraums zwar einen Trend, jedoch keine statistische Signifikanz aufwies. In einer multivariaten Analyse war die unvollständige Tumorresektion der histologische Parameter mit der höchsten prädiktiven Aussagekraft bezüglich eines Rezidivs. Patienten mit fraglich knapp im Gesunden entfernten oder fraglich durchtrennten Karzinomen wiesen eine signifikant erhöhte Rezidivrate auf und sollten klinisch als Risikopatienten betrachtet werden. Die beschriebene Daten- und Gewebebank legt eine wichtige und wertvolle Grundlage für zukünftige wissenschaftliche Untersuchungen mittels Immunhistochemie, Immunfluoresezenz, Molekulargenetik und andere DNA-basierte Methoden. Die in diesen Untersuchungen erhobenen Befunde können mit den in der Datenbank abgelegten histopathologischen Parametern korreliert und anhand der klinischen Verläufe auf prognostische Relevanz überprüft werden. / In this work the establishment and characterisation of a big data bank, tissue bank and DNA bank was described in a group by 311 patients with prostate gland cancer and known clinical Follow-up with an observation period of 5 years on average. All cases were on the right-classed by an observer uniformly after a standardised catalogue. The upraised data could be checked by correlation with the clinical courses on plausibility and be validated thereby. The examined cases corresponded with regard to frequency distribution in tumour stage and Gleason-Grading to the frequencies to be expected from references. Statistically significant risk factors with regard to a Tumorrezidivs which was defined here as a more postal-surgical reincrease of the PSA in the blood serum were a high tumour stage, high Gleason score, extraprostatic perineuralsheathe-infiltration and incomplete resection, while the proof of lymph node metastases showed though a trend, however, no statistical significance at the time of the operation within the postobservation period available here. In a multivariaten analysis the incomplete tumour resection was the histologic parameter with the highest predictive explanatory power with regard to a Rezidivs. Patients with doubtfully scarcely in the healthy removed or doubtfully split to cancers showed a significantly raised Rezidivrate and should be looked clinically as risk patients. The described data bank and tissue bank lays an important and valuable basis for future scientific examinations by means of Immunhistochemie, Immunfluoresezenz, molecular genetics and other methods based on DNA. The findings upraised in these examinations can be correlated with the histopathologic parameters stored in the data bank and be checked with the help of the clinical courses for prognostic relevance.
37

Reducing the morbidity of transurethral resection of the prostate based on patient selection, fluid absorption, and blood loss /

Sandfeldt, Lars, January 1900 (has links)
Diss. (sammanfattning) Stockholm : Karol. inst., 2001. / Härtill 5 uppsatser.
38

Prostatakarzinomvorsorgeuntersuchung inklusive PSA-Screening in einer urologischen Praxis zwischen 1997 und 2006

Hobusch, Dirk January 2008 (has links)
Zugl.: München, Techn. Univ., Diss., 2008
39

Die prognostische Relevanz eines initialen PSA-Anstiegs unter Chemotherapie mit Docetaxel bei hormonrefraktärem Prostatakarzinom

Kräuter, Petra Monica. Unknown Date (has links) (PDF)
Marburg, Universiẗat, Diss., 2008.
40

Calendula officinalis

Volpato, Ana Márcia de Matos January 2000 (has links)
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Química. / Made available in DSpace on 2012-10-17T21:52:24Z (GMT). No. of bitstreams: 1 193200.pdf: 1456188 bytes, checksum: b8aa33b16dc255618948d74227fb9e23 (MD5) / A Calendula officinalis é uma planta ornamental e medicinal, adaptada e cultivada no estado do Paraná. Neste estudo foi investigado a composição química de suas flores, onde foi isolado ácido palmítico, um flavonóide Typhaneoside e grande quantidade de saponina derivado do ác. oleanólico, que se mostrou bastante tóxica. Foi identificado na fr. hexânica ác. octadecanóico e traços de ác. palmítico. No estudo farmacológico foi analisado os efeitos das frações sobre nocicepção e do extrato bruto na hiperplasia benigna de próstata. Ambos resultados se mostraram beneficamente positivos.

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