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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

Characterization of the cytosolic proteins involved in the amoeboid motility of ascaris sperm

Buttery, Shawnna Marie. Roberts, Thomas M., January 2003 (has links)
Thesis (Ph. D.)--Florida State University, 2003. / Advisor: Dr. Thomas M. Roberts, Florida State University, College of Arts and Sciences, Department of Biological Science. Title and description from dissertation home page (viewed Aug. 23, 2004). Includes bibliographical references.
32

Efeito protetor dos extratos de Ascaris suum e Coccidioides posadasii e da lectina da semente de Dioclea violacea na artrite por zymosan em ratos e camundongos / Effect protector of the Ascaris suum and Coccidioides posadasii extracts and lectin of the seeds Dioclea violacea in arthritis zymosan in rats and mice

Leite, Ana Karine Rocha de Melo January 2009 (has links)
LEITE, Ana Karine Rocha de Melo. Efeito protetor dos extratos de Ascaris suum e Coccidioides posadasii e da lectina da semente de Dioclea violacea na artrite por zymosan em ratos e camundongos. 2009. 70 f. Tese (Doutorado) - Universidade Federal do Ceará. Faculdade de Medicina. Programa de Pós-Graduação em Ciências Médicas, Fortaleza, 2009. / Submitted by denise santos (denise.santos@ufc.br) on 2011-10-05T13:37:05Z No. of bitstreams: 1 2009_tese_akrmleite.pdf: 1567980 bytes, checksum: 9f13d2575ffdfa87c6cfdfc7a9ccfc75 (MD5) / Approved for entry into archive by Eliene Nascimento(elienegvn@hotmail.com) on 2011-10-07T12:10:24Z (GMT) No. of bitstreams: 1 2009_tese_akrmleite.pdf: 1567980 bytes, checksum: 9f13d2575ffdfa87c6cfdfc7a9ccfc75 (MD5) / Made available in DSpace on 2011-10-07T12:10:24Z (GMT). No. of bitstreams: 1 2009_tese_akrmleite.pdf: 1567980 bytes, checksum: 9f13d2575ffdfa87c6cfdfc7a9ccfc75 (MD5) Previous issue date: 2009 / The interactions between innate and acquired immune responses participate in the pathophysiology of the autoimmune diseases. Though infections are associate with the development of the chronic arthritis it is possible that exposure to some germs as helminthes and fungi influences potentially the prevalence and/or gravity of the immune diseases. Lectins derivate of the plants can modulate the inflammation by action in receptors of the innate response. We investigated the effect of extracts from Ascaris suum (AS), Coccidioides posadasii (CS) and a lectin isolated from Dioclea violacea (Dviol) in zymosan-induced arthritis (ZyA). Wistar rats and Swiss mice received 1 mg or 0.1 mg zymosan intra-articular (i.art.), respectively. Groups were pretreated (30 min) with AS (0.25 - 2.5 mg/animal; i.p. or p.o.) CP (1 - 100 µg/animal; i.art. i.p. or p.o) or Dviol (0.3 - 30 µg; i.art. or 1 - 6 mg/kg; i.v.). Non-treated group (NT) received Zy (i.art.) and the vehicle. Naive animals received just saline (i.art.) and the vehicle. The hypernociception was evaluated through articular incapacitation test in s/1min. The joint exudate was used for evaluation of cell influx (CI), nitrite and cytokine levels. The synovium was used for histopatology. The glycosaminoglycan (GAG) content of the cartilage was quantificated for the measured of the structural damage. The AS extract both i.p. and p.o. significantly and dose-dependently inhibited CI and hypernociception in ZyA as compared to NT (P<0.01) as well as reverted articular damage assessed by quantification of the GAG and by synovitis observed in the histology. The administration of the AS extract reduced significantly levels of nitrite, interleukin-1β (IL-1β) and IL-10, but not tumor necrosis factor alpha (TNF-α) as compared to NT. In mice, it reduced IL-10 but not IL-1β and TNF- α. The treatment with CP extract both i.p. and p.o. inhibited hypernociception and CI in ZyA as compared to NT, but not reverted articular injury measured by GAG and histology. The administration of the Dviol in naïve animals promoted CI significant, though just the highest dose (30 g) promoted hypernociception. In ZyA, Dviol (i.art.) reduced the CI and hypernociception dose-dependently (P<0.01). The administration of Dviol (i.v.) significantly reduced both the hyperalgesia and CI in ZyA as compared to NT (P<0.01). The effect of the Dviol was reverted when it was pre-incubated with mannose (1M). The date show that AS extract promote functional improve and protect of the articular damage in ZyA that are associate with reduction of the NO and cytokine (i.art.) liberation. This effect is species independent and functions orally. An extract of the fungi CP has anti-inflammatory activity in ZyA. A lectin isolated of the Dviol reduces CI and hypernociception in ZyA probably by coupling the mannose receptor. Together the results show that substances that act in receptors of the innate response modulate the immunomediate articular inflammation. / Interações entre a resposta imune inata e adquirida participam na fisiopatologia de doenças auto-imunes. Embora infecções estejam associadas ao desenvolvimento de artrites crônicas, é possível que exposição a alguns germes, como helmintos e fungos, potencialmente influencie a prevalência e/ou gravidade de doenças imunomediadas. Lectinas derivadas de plantas, por ação em receptores de resposta inata, podem modular inflamação. Nós investigamos o efeito dos extratos de Ascaris suum (AS) e de Coccidioides posadasii (CP) e de uma lectina isolada da Dioclea violacea (Dviol) na artrite induzida por zymosan (AZy). Ratos Wistar e camundongos Swiss receberam 1 mg ou 0,1 mg de zymosan intra-articular (i.art.), respectivamente. Grupos foram pré-tratados (30 min) com os extratos de AS (0,25 - 2,5 mg/animal; i.p ou p.o.), CP (1 - 100 µg/animal; i.art., i.p. ou p.o.) ou Dviol (0,3 - 30 µg i.art. ou 1 - 6 mg/Kg e.v.). Grupo não-tratado (NT) recebeu Zy (i.art.) e veículo. Animais naive receberam apenas salina (i.art.) e veículo. A hipernocicepção foi avaliada através do teste de incapacitação articular em s / 1min. O lavado articular foi usado para análise do influxo celular (IC), níveis de nitrito e citocinas. A sinóvia foi utilizada para histopatologia. O conteúdo de glicosaminoglicanos (GAG) da cartilagem foi quantificado para medir dano estrutural. O extrato de AS, seja i.p. ou p.o., inibiu de forma dose-dependente a hipernocicepção e o IC na AZy em relação ao grupo NT (P<0,01), bem como reverteu o dano articular avaliado pela quantificação de GAG e a sinovite vista à histologia. A administração do extrato de AS, reduziu significantemente os níveis de nitrito, inteleucina-1β (IL-1β) e IL-10, mas não de fator de necrose tumoral alfa (TNF-α), em relação ao NT. Em camundongos, o extrato de AS reduziu os níveis de IL-10, mas não de IL-1β ou TNF-α. O tratamento com o extrato de CP, seja i.p. ou p.o., inibiu significantemente a hipernocicepção e o IC na AZy, em relação ao NT, no entanto, não reverteu a lesão articular medida pela quantidade de GAG e histologia. A administração da Dviol, em animais naive promoveu IC significante, embora apenas a maior dose (30µg) promoveu hipernocicepção. Na AZy, a injeção i.art. da Dviol reduziu o IC e hipernocicepção de forma dose-dependente, em relação ao NT (P<0,01). A administração da Dviol (i.v.) reduziu ambos hipernocicepção e IC na AZy, em relação ao NT (P<0,01). O efeito da Dviol foi revertido quando essa lectina foi pré-incubada com manose 1 M. Os dados mostram que um extrato de AS promove melhora funcional e protege do dano estrutural na AZy, que são associados com redução na liberação de NO e citocinas i.art. Esse efeito independe da espécie e ocorre por via oral. Um extrato do fungo CP tem ação anti-inflamatória na AZy. Uma lectina isolada da Dviol reduz IC e hipernocicepção na AZy, provavelmente por acoplamento a um receptor de manose. Em conjunto, os resultados mostram que substâncias que agem em receptores de resposta inata modulam a inflamação articular imunomediada.
33

Estudo comparativo, randomizado para avaliar a eficácia terapêutica da piperazina hexahidratada com extrato fluido de rhamnus purshiana no tratamento da ascaridíase / Evaluation of the therapeutical effectiveness of the piperazine hexahidratada associated with the fluid extract of Rhamus purshiana in the treatment of the worn infections

Viana, Fernando André Campos January 2007 (has links)
VIANA, Fernando André Campos. Estudo comparativo, randomizado para avaliar a eficácia terapêutica da piperazina hexahidratada com extrato fluido de rhaminus purshiana no tratamento da ascaridiáse. 2007. 158 f. Dissertação (Mestrado em Farmacologia) - Universidade Federal do Ceará. Faculdade de Medicina, Fortaleza, 2007. / Submitted by denise santos (denise.santos@ufc.br) on 2012-03-26T15:39:46Z No. of bitstreams: 1 2007_dis_facviana.pdf: 3788167 bytes, checksum: 34c8bbadb9a03050a736228241d74956 (MD5) / Approved for entry into archive by Eliene Nascimento(elienegvn@hotmail.com) on 2012-03-27T15:58:40Z (GMT) No. of bitstreams: 1 2007_dis_facviana.pdf: 3788167 bytes, checksum: 34c8bbadb9a03050a736228241d74956 (MD5) / Made available in DSpace on 2012-03-27T15:58:40Z (GMT). No. of bitstreams: 1 2007_dis_facviana.pdf: 3788167 bytes, checksum: 34c8bbadb9a03050a736228241d74956 (MD5) Previous issue date: 2007 / The efficacy and the therapeutic security of a manufactured piperazina associated with the extract fluid of Rhamnus purshiana (DM Indústria Farmacêutica) used for deworming patients in Ceará, Brazil, were tested against the product composed by piperazina without any association (DM Indústria Farmacêutica). A prospective, randomized, controlled and double blind clinical trial, comparing cure rates for Ascaris lumbricoides infections. Stool samples from 990 volunteers were collected at baseline and the prevalence of intestinal parasitic infections were viewed. 130 patients with faecal sample positive for Ascaris lumbricoides were included on the clinical trial, to assess the efficacy and therapeutic security. Socio-economic and sanitation information was obtained by an oral questionnaire. More than half of the patient showed monoparasitism (60%) and prevalence of Ascaris lumbricoides was (29%) in the study population. Intestinal helminth and protozoon infections egg positive rate was 48.38% (trichuriasis 4%, ancylostomiasis 0%, amebiasis 04%, giardiasis 10%). Cure rate for piperazine associated with the extract fluid of Rhamnus purshiana was 93.33% and piperazine without any association was 96.36%, so there was no significant difference in the cure rates (P = 0.6809). The most prevalent side effects were nausea 13.84% and vomit 11.53%. There was no significant difference in the prevalence of side effects (P = 0.2348). Socio-economic and sanitation dates showed narrow relation with Ascaris lumbricoides. Piperazine associated with the extract fluid of Rhamnus purshiana was efficient and insurance in the treatment of Ascaris lumbricoides in the studied population. / A eficácia e a segurança terapêutica de um medicamento a base de piperazina hexahidratada associada com o extrato fluido de Rhamnus purshiana (DM Indústria Farmacêutica) usada como tratamento anti-helmíntico em pacientes no Ceará, Brasil, foi testado em comparação com o produto composto de piperazina sem qualquer associação (DM Indústria Farmacêutica). Um estudo prospectivo, randomizado, controlado e duplo cego, comparando taxas de cura para infecção por Ascaris lunbricoides. Amostras coprológicas de 990 pacientes foram coletadas inicialmente e a prevalência de infecções parasitárias intestinais foi examinada. 130 pacientes com amostras fecais positivas para Ascaris lumbricoides foram incluídos nos ensaios clínicos, no intuito de ser comprovada a eficácia e a segurança terapêutica. Informações sobre dados socioeconômicos e de saneamento foram coletas a partir de questionário próprio. Mais da metade dos pacientes mostrou taxa de monoparasitismo (60%) e prevalência de Ascaris lumbricoides de 29%. Taxa positiva para helmintíase intestinal e infecções por protozoários atingiram índice de 48,38% (tricuríase 04%, ancilostomíase 0%, amebíase 04%, giardíase 10%). Taxa de cura da piperazina associada com extrato fluido de Rhamnus purshiana foi de 93,33% e para a piperazina sem associações foi de 96,36%, portanto não apresentou diferença estatisticamente significante em relação às taxas de cura dos medicamentos em estudo (P = 0,6809). Náusea (13,84%) e vômito (11,53%) foram os eventos adversos mais prevalentes. Não foi evidenciada diferença estatisticamente significante em relação à ocorrência de eventos adversos nas duas formulações (P = 0,2348). Dados socioeconômicos e de saneamento mostraram íntima relação com a ocorrência infecção por Ascaris lumbricoides. Piperazina associada com extrato fluido com Rhamnus purshiana mostrou-se eficaz e segura no tratamento da ascaridíase, na população estudada.
34

Mecanismos de imunorregulação do extrato solúvel de Áscaris summ e de sua associação com N-acetil-L-cisteína na hepatite autoimune experimental

SILVA, Roeckson Carlos Peixoto 13 February 2015 (has links)
Submitted by Isaac Francisco de Souza Dias (isaac.souzadias@ufpe.br) on 2016-03-31T17:58:12Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação_Roeckson MEDTROP.pdf: 1220007 bytes, checksum: 14de64602635da31ee8f293596dc60ea (MD5) / Made available in DSpace on 2016-03-31T17:58:12Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação_Roeckson MEDTROP.pdf: 1220007 bytes, checksum: 14de64602635da31ee8f293596dc60ea (MD5) Previous issue date: 2015-02-13 / CNPQ / O extrato de vermes adultos de Ascaris suum (Asc) possui efeito anti-inflamatório e imunossupressivo, entretanto durante a hepatite autoimune experimental foi capaz de induzir a produção colágeno. A N-acetil-L-cisteína (NAC), que apresenta propriedades antioxidantes e antifibróticas, pode melhorar a ação do Asc em modelos de desordens inflamatórias, reduzindo a síntese de colágeno. Portanto, o objetivo deste estudo foi avaliar os efeitos do Asc e de sua associação com a NAC como estratégia de tratamento para hepatite autoimune, que apresenta a cirrose como principal complicação decorrente de falha na terapia convencional. A hepatite autoimune experimental foi induzida pela administração intravenosa da lectina concanavalina A em animais BALB/c (HAE). Após indução, um grupo foi tratado com Asc (HAE+Asc) e outro grupo com Asc e NAC (HAE+Asc+NAC). Como controle, um grupo foi tratado com salina (HAE). Foram quantificados e comparados entre os grupos o peso hepático e sua análise anatomohistopatológica, os níveis das transaminases e imunoglobulinas totais, a produção de óxido nítrico (NO) e das citocinas interleucina (IL)-5, IL-10, IL-13 e do fator de transformação do crescimento beta (TGF-β). Nos grupos tratados, o Asc ocasionou a redução dos níveis das transaminases, imunoglobulinas totais e do infiltrado inflamatório, bem como o aumento da produção de TGF-β quando comparados com o grupo HAE. Quando a NAC foi associada ao esquema terapêutico, a produção de colágeno foi controlada e acompanhada por níveis reduzidos de NO e IL-13. No grupo HAE+Asc+NAC também foi observada redução do peso hepático e níveis elevados de IL-5 e IL-10. Dessa forma, a estratégia de tratamento para HAE foi melhorada quando a NAC foi associada ao Asc no esquema terapêutico. / The adult worm extract of Ascaris suum (Asc) has potent anti-inflammatory and immunosuppressive effect, however during experimental autoimmune hepatitis was capable of inducing collagen production. The N-acetyl-L-cysteine (NAC), which has antioxidants and antifibrotic properties, may enhance the action of Asc in models of inflammatory disorders, reducing collagen synthesis. Therefore, the aim of this study was to evaluate the effects of Asc and its association with the NAC as a treatment strategy for autoimmune hepatitis, which exhibit the cirrhosis as main complication arising from failure to conventional therapy. Experimental autoimmune hepatitis was induced by intravenous administration of concanavalin A lectin in Balb/c animals (EAH). After induction, one group was treated with Asc (HAE+Asc) and another group with Asc and NAC (HAE+Asc+NAC). As a control, one group was treated with saline (HAE). Were quantified and compared between groups liver weight, aminotransferase levels and total immunoglobulins and anatomopathological analysis, nitric oxide (NO) production and cytokine interleukin(IL)-5, IL10, IL-13 and the transforming growth factor beta (TGF-β). In the treated groups, the ASC caused the reduction in levels of transaminases, total immunoglobulins and inflammatory infiltration, as well as increases TGF-β production compared with the group EAH. When the NAC was associated with the treatment regimen, collagen production was controlled and accompanied by reduced levels of NO and IL-13. In EAH+Asc+NAC group was also observed reductions in liver weight and high levels of IL-5 and IL-10. Thus, the treatment strategy for HAE were improved when NAC was associated with Asc the therapeutic regimen.
35

Propriedades imunorreguladoras de extratos solúveis obtidos de vermes adultos ou de ovos de Ascaris suum. / Immunoregulatory properties of soluble extracts from Ascaris suum worms or eggs.

Valdênia Maria Oliveira de Souza 20 October 1999 (has links)
O extrato de Ascaris suum (Asc total), preparado a partir de uma mistura de vermes machos e fêmeas (albergando ovos), suprime a resposta imune específica a ovalbumina (OA). A partir do fracionamento deste extrato por gel filtração demonstrou-se que componentes protéicos de alto peso molecular (PM), eluídos no primeiro pico (PI), eram supressores da resposta a OA e os eluídos no terceiro pico (PIII) estimularam uma resposta maior de anticorpos IgE anti-Asc. Uma resposta do tipo Th2 foi preferencialmente estimulada por este extrato, sendo as citocinas IL-4 e IL-10 atuantes na supressão dos parâmetros da resposta anti-OA mediados por células Th1. Em algumas espécies de helmintos a resposta Th2 é estimulada de forma estágio-específica. Assim, analisamos neste trabalho quais dos componentes do Asc total seriam responsáveis pelo efeito supressor. Verificamos que os extratos dos vermes adultos apresentaram perfis cromatográficos semelhantes ao do extrato total. O perfil cromatográfico do Asc O foi distinto, com um segundo pico (PII) mais evidente e apresentou um quarto pico de menor PM. O fracionamento eletroforético confirmou uma concentração de proteínas com PM entre 107 e 52 kDa e a presença de proteínas adicionais entre 27,2 e 19 kDa neste extrato. Os extratos de vermes e dos ovos suprimiram a resposta imune celular específica a OA, avaliada por reações de hipersensibilidade tardia, resposta proliferativa de células de linfonodos drenantes e secreção de citocinas por estas células. A produção de anticorpos IgG1 e IgG2a anti-OA foi também diminuída acentuadamente pelos mesmos extratos. Observamos, ainda, que as citocinas predominantes na resposta aos extratos dos vermes e dos ovos foram diferentes, com maior secreção de IL-4 e IL-10 nos primeiros e IFN-g no segundo. Com relação às diferentes frações do Asc O, a produção de anticorpos IgE anti-OA foi suprimida por componentes de PI e PIII, enquanto que os de PII estimularam a síntese maior de IgE anti-Asc O. Os componentes de PIV não tiveram nenhum efeito. Nossos resultados indicam que o efeito supressivo do Asc total é uma propriedade que pode ser atribuída aos vermes machos e fêmeas. No entanto, o extrato preparado a partir dos ovos também apresenta este efeito, o qual parece ser mediado por mecanismos diferentes. / The extract of Ascaris suum (whole Asc), prepared from male and female worms (with stored eggs) suppress the specific immune response to ovalbumin (OA). This extract was fractionated by gel filtration and high and low molecular weight (MW) proteins were obtained in the first (PI) and third peak (PIII), respectively. PI suppressed the OA-specific cellular and humoral responses and PIII stimulated more anti-Asc IgE antibodies. The whole Asc stimulated a Th2 response predominantly, with high levels of IL-4 and IL-10. These cytokines had an important role in the down-regulation of the Th1 response to OA. In some helminthic infections the Th2 response is stimulated by specific stages of the life cycle. Thus, in this work we investigated which components of whole Asc were responsible for immunosuppression. The worm extracts presented similar chromatographic profiles. The profile of Asc O was distinct, with the second peak being more evident and showing a fourth peak with much lower MW components. By polyacrylamide gel electrophoresis we observed a high concentration of proteins between 107 and 52 kDa. In addition, some bands between 27,2 and 19 kDa were only present in this extract. The extracts from worms and eggs suppressed the cell-mediated immune response to OA, measured by delayed-type hypersensitivity, proliferative response of draining lymph node cells and cytokine secretion. The anti-OA IgG1 and IgG2a antibody production were as drastically reduced by these extracts. The cytokines IL-4 and IL-10 were mainly secreted in response to worm extracts, whereas the egg extract stimulated more IFN-g. Regarding the different fraction of Asc O, PI and PIII components diminished the anti-OA IgE antibody production, whereas PII components stimulated higher anti-Asc O IgE synthesis. PIV components did not display any effect. Our results indicate that the immunosuppressive effect of whole Asc is due to male and female body components. However, extracts prepared from eggs do also display this effect, that seems to be mediated by different mechanisms.
36

Studies on the NAD⁺-malic Enzyme from Ascaris Suum

Landsperger, William J. 12 1900 (has links)
The NAD+-linked malic enzyme from Ascaris suum has been studied with regard to its kinetic and catalytic properties. Possible relationships between these properties and the physiological functioning of the malic enzyme were examined.
37

Purification and Characterization of Glycogen Synthase from Ascaris Suum

Hannigan, Linda L. (Linda Lucile) 08 1900 (has links)
Glycogen synthase, the enzyme that catalyzes the rate-limiting reaction of glycogen syntheses has been purified and characterized from Ascaris suum muscle. Glycogen in the crude extract was digested to release the enzyme, eluted from a DE52 cellulose column and then applied to a Sepharose affinity column. The purified Ascaris enzyme was found to be homologous to the mammalian enzyme with regard to subunit and holoenzyme Mr^3 allosteric activation, substrate affinity and covalent modification. However, the association between Ascaris glycogen synthase and endogenous glycogen differed from that in mammalian systems.
38

Fumarase From Ascaris Suum: Partial Purification and Characterization

Powley, David G. 05 1900 (has links)
One molecular form of fumarase from Ascaris suum was demonstrated by cellulose acetate electroporesis and isoelectric focusing. The enzyme was partially purified by ammonium sulfate fractionation and ion-exchange chromatography to a specific activity of 49 units per mg protein. Enzymatic assay of the partially purified by ammonium sulfate fractionation amd ion-exchange chromatography to a specific activity of 49 units per mg protein. Enzymatic assay of the partially purified preparation showed glyceraldehyde-3-phosphate dehydrongenase to be the major preparative contaminant.
39

Kinetic mechanism of NAD-malic enzyme from Ascaris suum in the direction of reductive carboxylation of pyruvate

Mallick, Sushanta 12 1900 (has links)
For this pseudoquadreactant enzymatic reaction (Mn2+ is a psuedoreactant), initial velocity patterns were obtained under conditions in which two substrates were maintained saturating while one reactant was varied at several fixed concentrations of the other.
40

Neuroregulation and Myosin Light Chain Phosphorylation in Ascaris Suum Obliquely Striated Skeletal Muscle

Martin, Rex E. (Rex Edward) 08 1900 (has links)
Extraction and quantitation of myosin light chain two coupled with myograph recordings from Ascaris muscle perfused with calmodulin inhibitors and neurotransmitters in conjunction with their respective agonists and antagonists have been used to establish the regulation of contraction in this muscle. Densitometric tracings of isolectric focusing gels separating the regulatory light chain were used to quantitate phosphorylation in resting, contracted and flaccid muscle. These studies indicated that inhibitory neurostimulation is mediated by a true GABA receptor. Myosin-mediated contraction is responsible for maintaining the level of tension observed in resting actin-mediated muscle. Actin-mediated contraction is responsible for the rapid rise in tension following excitatory stimuli. Both systems function simultaneously and are independant.

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