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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.
151

Analysis of the Interaction between Viruses, Mirnas and the Rnai Pathway

Umbach, Jennifer Lin, January 2008 (has links)
Thesis (Ph. D.)--Duke University, 2008. / Includes bibliographical references.
152

Characteristics of Herpesvirus hominis type 1 and 2 grown at 25⁰ centigrade

McFarland, Clarence Ross. January 1972 (has links)
Thesis (D.P.H.)--University of Michigan.
153

The effects of sexually transmitted illness (STI) stigmatization on intimate relationships non-infected partners' perceptions, reactions, feelings and attitudes toward female partners' disclosure of Herpes Simplex Virus (HSV) positive status : a project based upon an independent investigation /

Williams, Sarah Heath. January 2009 (has links)
Thesis (M.S.W.)--Smith College School for Social Work, Northampton, Mass., 2009. / Includes bibliographical references (p. 65-68).
154

Investigation of the mechanisms of ozone-mediated viral inactivation /

Ohmine, Seiga, January 2005 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Microbiology and Molecular Biology, 2005. / Includes bibliographical references.
155

Characteristics of Herpesvirus hominis type 1 and 2 grown at 25⁰ centigrade

McFarland, Clarence Ross. January 1972 (has links)
Dissertation (D.P.H.)--University of Michigan.
156

Inhibition of herpes simplex virus replication using small interfering rna that target icp4 gene of herpes simplex type 2

Rajaguru, Suesha Chandani. January 2004 (has links)
Thesis (M.S.)--University of Florida, 2004. / Typescript. Title from title page of source document. Document formatted into pages; contains 65 pages. Includes Vita. Includes bibliographical references.
157

Characterization of the role of herpes simplex virus protein VP16 in viral gene expression through interactions with the virion host shutoff protein (VHS) and HCF-1/

Knez, Jozo. Capone, John P. January 2003 (has links)
Thesis (Ph.D.)--McMaster University, 2004. / Advisor: John P. Capone. Includes bibliographical references (p. 179-[208]). Available also online.
158

ABVIC: A NOVEL FLOW CYTOMETRY-BASED ASSAY FOR THE DETECTION OF HSV-SPECIFIC ANTIBODIES

Sowa, Gavin Michael 01 December 2016 (has links)
Herpes simplex virus type 1 (HSV-1) and herpes simplex virus type 2 (HSV-2) are closely related viruses that establish lifelong infection in their hosts and can periodically reactivate to cause painful lesions. Approximately 50 million Americans are infected with HSV-2, the primary cause of genital ulcerative disease. In addition to the pain of the physical symptoms, genital herpes is highly stigmatized and can cause significant reductions in quality of life. HSV-2 has been demonstrated to have a synergistic relationship with HIV, where it enhances the transmissibility, susceptibility and severity of disease. In addition, potentially life-threatening neonatal herpes occurs in about 1 in 10,000 live births. While there are known means of reducing the risk of transmission, the overwhelming majority of infected persons are unaware of their status, and they remain the driving force behind new infections. Virological tests, such as PCR, are ill suited for asymptomatic infections since the detectable virus is only shed on <10% of days. Currently available type-specific serological tests based on glycoprotein G are prone to false-positive results, lack the sensitivity to detect new infections and may be affected by cross-reactivity between HSV-1 and HSV-2. Due to the known limitations of HSV serological testing, it is not recommended for the general population or pregnant women. In the first half of my thesis, I evaluate a new flow-cytometry-based method that measures serum antibody-binding to virus-infected cells (ABVIC). We obtained a panel of human control sera from Westover Heights Clinic (WHC) and determined if the ABVIC could measure HSV-specific antibody binding to test-cells. We found that the assay was sensitive, semi-quantitative, and could be made type-specific with the addition of a pre-adsorption step. The ABVIC offers an advantage over the standard of care single-antigen tests as the result measuring antibody binding to all viral proteins fixed in their native conformation. In the second half of my thesis, I used the ABVIC assay test n=34 blinded test-sera. Of these, n=17 had previously tested as “indeterminate” by bother Herpeselect ELISA as well as Western Blot. Following unblinding, we found that the ABVIC properly identified all n=17 patient sera of an unambiguous serostatus. Of the indeterminate sera, all were found to be seronegative for HSV-2. Based on these surprising results, we requested an additional n=11 indeterminate samples, which were also found to be HSV-2 seronegative. Most of the "Indeterminate" serum samples exhibited high background, which produced weak reactivity in HerpeSelect and Western blot assays, but did not confound the internally controlled ABVIC test.
159

PRODUÇÃO E CARACTERIZAÇÃO DE NANOCÁPSULAS DE NÚCLEO AQUOSO CONTENDO O PEPTÍDEO SSIEFARL DO HERPES SIMPLEX VÍRUS-1 PARA APLICAÇÃO VACINAL

Melo, Larissa Daiane Willrich de 25 March 2013 (has links)
Made available in DSpace on 2018-06-27T18:56:12Z (GMT). No. of bitstreams: 2 Larissa Daiane Willrich de Melo.pdf: 1466861 bytes, checksum: 3695d65f6aa448f284f69ac1afd4510f (MD5) Larissa Daiane Willrich de Melo.pdf.jpg: 3370 bytes, checksum: 20955982b01b119bb6af06d3b4896dcc (MD5) Previous issue date: 2013-03-25 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Efforts to develop an effective vaccine against Herpes Simplex Virus-1 (HSV-1) has been intense enough, however, there is no effective vaccine yet. The using of nanocapsules (Ncs) for production of viral vaccines may contribute to the enhancement and effectiveness of the already developed vaccines models. The main properties of the nanostructured system, which may contribute to the improvement of the immune response generated by vaccine is the slow and gradual release of the encapsulated content, protection of the encapsulated molecule or protein and adjuvanticity, inherent in every Ncs. The objective of this study was to produce and characterize nanocapsules with aqueous core to encapsulate the SSIEFARL peptide from HSV-1. This peptide has hydrophilic characteristics which impossibility the encapsulation in conventional nanocapsules with oil core. For the standardization of the tunnel several adaptations where modified in the system previously developed by Lambert et al. Among these, the stirring of the suspension, temperature, amount of surfactant, amount of peptide and settling time were adapted. All protocols two aqueous suspensions were tested, one with the organic solvent ethanol in the aqueous phase or only water. The results showed that the production with magnetic stirring in the presence of ethanol in the aqueous phase lead to Ncs with better physicochemical characteristics. Empty Ncs presented an average of particle size of 285 nm (+ 19,4) and zeta potential of -40.1 mV (+ 1,7) and the Ncs containing SSIEFARL peptide presented the size of 315 nm (+ 20,7) and zeta potential of -35,5 mV (+ 2,4). Other condition of production tested was the water temperature added during the production. When water was used at 40 °C the physico-chemical parameters were better than when room temperature water was used. Additionally, we tested the stability of the suspensions after storage at room temperature or 4 °C. The Ncs were stable for longer periods of time under refrigeration. For the characterization of morphostructure, Ncs were analyzed by transmission electron microscopy (TEM). This analysis revealed that Ncs present as spherical structures, homogeneous and uniform as standards in nanostructure for biological application. The analysis of Ncs by confocal microscopy was applied to investigate the encapsulation. Three amounts of SSIEFARL-6 FAM peptide were used (20, 30 or 50 &#956;L), and the 20 &#956;L showed better encapsulation. The analysis of the release profile of the peptide from Ncs showed that of the suspension produced with 20 &#956;L was more linear, demonstrating slow release for at least 24 h. These data indicate that the method of production under magnetic stirring with ethanol and 20 &#956;L of peptide in the aqueous phase is more suitable for production of aqueous core Ncs. Furthermore, empty Ncs at low concentrations showed no cytotoxicity to lymphoid cells from BALB-c in cell culture. Thus, we suggest that this approach has promising potential for developing a vaccine against HSV-1. / Os esforços para o desenvolvimento de uma vacina eficaz contra o Herpes Simplex Vírus-1 (HSV-1) tem sido bastante intensos, entretanto, ainda não existe uma vacina eficaz. A utilização de nanocápsulas (Ncs) para a produção de vacinas anti-virais pode contribuir para o aprimoramento e eficácia dos modelos vacinas já desenvolvidos. As principais propriedades desse sistema nanoestruturado, que podem contribuir para a melhora da resposta imune gerada por uma vacina são liberação lenta e gradual do conteúdo encapsulado, a proteção da molécula ou proteína encapsulada e a adjuvanticidade, inerente a cada Ncs. Assim, o objetivo deste estudo foi produzir e caracterizar nanocápsulas de núcleo aquoso, capazes de encapsular o peptídeo SSIEFARL do HSV-1. Este peptídeo possui características hidrofílicas sendo impossível a encapsulação em nanocápsulas convencionais de núcleo oleoso. Para a padronização do encapsulamento, foram combinadas diversas adaptações ao sistema previamente desenvolvido por Lambert e colaboradores. Dentre essas, foram adaptados o modo de agitação das suspensões, temperatura, quantidade de tensoativo, quantidade de peptídeo e tempo de sedimentação. Em todos os métodos foram testados duas alterações na fase aquosa das suspensões, foram produzidas Ncs com solvente etanol, na fase aquosa e/ou sem. Como resultados foram observados que a produção com agitação magnética em presença de etanol na fase aquosa foi a que produziu NCs com melhores características físico-químicas. Foram obtidas Ncs brancas com tamanho de partícula médio de 285 nm (+ 19,4) e potencial zeta de -40,1 mV (+ 1,7) e Ncs contendo o peptídeo SSIEFARL com tamanho de 315 nm (+ 20,7) e potencial zeta de -35,5 mV (+2,4). Outra condição alterada foi a temperatura da água adicionada durante os processos de produção. Quando foi utilizada água na temperatura de 40 oC os parâmetros físico-químicos foram melhores do que quando foi utilizada água na temperatura ambiente (T.A). Além disso, foi testada a estabilidade das suspensões após armazenamento em temperatura ambiente e geladeira (4oC). As nanocápsulas se mantiveram estáveis por mais tempo em sob refrigeração. Para a caracterização morfoestrutural das Ncs produzidas, foi utilizada a microscopia eletrônica de transmissão (MET). Essa análise revelou que as Ncs apresentam-se como estruturas esféricas, homogêneas e uniformes, conforme padrões estabelecidos para esse tipo de nanoestrutura. A análise das Ncs por microscopia confocal foi utilizada para comprovação do encapsulamento do peptídeo SSIEFARL-6-Fam, assim como a melhor quantidade. Foram utilizadas três quantidades de peptídeo (20, 30 ou 50 &#61549;L), sendo que a quantidade de 20 &#61549;L foi a que apresentou melhores resultados. O gráfico do perfil de liberação da suspensão produzida com 20 &#956;L mostrou-se mais linear, demonstrando liberação lenta por pelo menos 24 h. Estes dados apontam que a metodologia de produção sob agitação magnética com etanol e 20 &#956;L de peptídeo na fase aquosa apresentaram os melhores resultados para produção de nanocápsulas de núcleo aquoso. Além disso, as nanocápsulas brancas em baixas concentrações não apresentaram citotoxicidade para células de órgãos linfóides de camundongos BALB-c em cultura de células. Com isso, podemos sugerir que esta metodologia possui potencial promissor para desenvolvimento de vacina contra o HSV-1.
160

PRODUÇÃO E CARACTERIZAÇÃO DE NANOCÁPSULAS DE NÚCLEO AQUOSO CONTENDO O PEPTÍDEO SSIEFARL DO HERPES SIMPLEX VÍRUS-1 PARA APLICAÇÃO VACINAL

Melo, Larissa Daiane Willrich 25 March 2013 (has links)
Submitted by MARCIA ROVADOSCHI (marciar@unifra.br) on 2018-08-16T17:48:59Z No. of bitstreams: 2 Dissertacao_LarissaDaianeWillrichDeMelo.pdf: 1512214 bytes, checksum: b264a462161b24ec3ce2aacf05afea14 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2018-08-16T17:48:59Z (GMT). No. of bitstreams: 2 Dissertacao_LarissaDaianeWillrichDeMelo.pdf: 1512214 bytes, checksum: b264a462161b24ec3ce2aacf05afea14 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2013-03-25 / Efforts to develop an effective vaccine against Herpes Simplex Virus-1 (HSV-1) has been intense enough, however, there is no effective vaccine yet. The using of nanocapsules (Ncs) for production of viral vaccines may contribute to the enhancement and effectiveness of the already developed vaccines models. The main properties of the nanostructured system, which may contribute to the improvement of the immune response generated by vaccine is the slow and gradual release of the encapsulated content, protection of the encapsulated molecule or protein and adjuvanticity, inherent in every Ncs. The objective of this study was to produce and characterize nanocapsules with aqueous core to encapsulate the SSIEFARL peptide from HSV-1. This peptide has hydrophilic characteristics which impossibility the encapsulation in conventional nanocapsules with oil core. For the standardization of the tunnel several adaptations where modified in the system previously developed by Lambert et al. Among these, the stirring of the suspension, temperature, amount of surfactant, amount of peptide and settling time were adapted. All protocols two aqueous suspensions were tested, one with the organic solvent ethanol in the aqueous phase or only water. The results showed that the production with magnetic stirring in the presence of ethanol in the aqueous phase lead to Ncs with better physicochemical characteristics. Empty Ncs presented an average of particle size of 285 nm (+ 19,4) and zeta potential of -40.1 mV (+ 1,7) and the Ncs containing SSIEFARL peptide presented the size of 315 nm (+ 20,7) and zeta potential of -35,5 mV (+ 2,4). Other condition of production tested was the water temperature added during the production. When water was used at 40 °C the physico-chemical parameters were better than when room temperature water was used. Additionally, we tested the stability of the suspensions after storage at room temperature or 4 °C. The Ncs were stable for longer periods of time under refrigeration. For the characterization of morphostructure, Ncs were analyzed by transmission electron microscopy (TEM). This analysis revealed that Ncs present as spherical structures, homogeneous and uniform as standards in nanostructure for biological application. The analysis of Ncs by confocal microscopy was applied to investigate the encapsulation. Three amounts of SSIEFARL-6 FAM peptide were used (20, 30 or 50 μL), and the 20 μL showed better encapsulation. The analysis of the release profile of the peptide from Ncs showed that of the suspension produced with 20 μL was more linear, demonstrating slow release for at least 24 h. These data indicate that the method of production under magnetic stirring with ethanol and 20 μL of peptide in the aqueous phase is more suitable for production of aqueous core Ncs. Furthermore, empty Ncs at low concentrations showed no cytotoxicity to lymphoid cells from BALB-c in cell culture. Thus, we suggest that this approach has promising potential for developing a vaccine against HSV-1. / Os esforços para o desenvolvimento de uma vacina eficaz contra o Herpes Simplex Vírus-1 (HSV-1) tem sido bastante intensos, entretanto, ainda não existe uma vacina eficaz. A utilização de nanocápsulas (Ncs) para a produção de vacinas anti-virais pode contribuir para o aprimoramento e eficácia dos modelos vacinas já desenvolvidos. As principais propriedades desse sistema nanoestruturado, que podem contribuir para a melhora da resposta imune gerada por uma vacina são liberação lenta e gradual do conteúdo encapsulado, a proteção da molécula ou proteína encapsulada e a adjuvanticidade, inerente a cada Ncs. Assim, o objetivo deste estudo foi produzir e caracterizar nanocápsulas de núcleo aquoso, capazes de encapsular o peptídeo SSIEFARL do HSV-1. Este peptídeo possui características hidrofílicas sendo impossível a encapsulação em nanocápsulas convencionais de núcleo oleoso. Para a padronização do encapsulamento, foram combinadas diversas adaptações ao sistema previamente desenvolvido por Lambert e colaboradores. Dentre essas, foram adaptados o modo de agitação das suspensões, temperatura, quantidade de tensoativo, quantidade de peptídeo e tempo de sedimentação. Em todos os métodos foram testados duas alterações na fase aquosa das suspensões, foram produzidas Ncs com solvente etanol, na fase aquosa e/ou sem. Como resultados foram observados que a produção com agitação magnética em presença de etanol na fase aquosa foi a que produziu NCs com melhores características físico-químicas. Foram obtidas Ncs brancas com tamanho de partícula médio de 285 nm (+ 19,4) e potencial zeta de -40,1 mV (+ 1,7) e Ncs contendo o peptídeo SSIEFARL com tamanho de 315 nm (+ 20,7) e potencial zeta de -35,5 mV (+2,4). Outra condição alterada foi a temperatura da água adicionada durante os processos de produção. Quando foi utilizada água na temperatura de 40 oC os parâmetros físico-químicos foram melhores do que quando foi utilizada água na temperatura ambiente (T.A). Além disso, foi testada a estabilidade das suspensões após armazenamento em temperatura ambiente e geladeira (4oC). As nanocápsulas se mantiveram estáveis por mais tempo em sob refrigeração. Para a caracterização morfoestrutural das Ncs produzidas, foi utilizada a microscopia eletrônica de transmissão (MET). Essa análise revelou que as Ncs apresentam-se como estruturas esféricas, homogêneas e uniformes, conforme padrões estabelecidos para esse tipo de nanoestrutura. A análise das Ncs por microscopia confocal foi utilizada para comprovação do encapsulamento do peptídeo SSIEFARL-6-Fam, assim como a melhor quantidade. Foram utilizadas três quantidades de peptídeo (20, 30 ou 50 L), sendo que a quantidade de 20 L foi a que apresentou melhores resultados. O gráfico do perfil de liberação da suspensão produzida com 20 μL mostrou-se mais linear, demonstrando liberação lenta por pelo menos 24 h. Estes dados apontam que a metodologia de produção sob agitação magnética com etanol e 20 μL de peptídeo na fase aquosa apresentaram os melhores resultados para produção de nanocápsulas de núcleo aquoso. Além disso, as nanocápsulas brancas em baixas concentrações não apresentaram citotoxicidade para células de órgãos linfóides de camundongos BALB-c em cultura de células. Com isso, podemos sugerir que esta metodologia possui potencial promissor para desenvolvimento de vacina contra o HSV-1.

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