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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

The Impact of Cytokines and HSV-1 on Rab5 Protein Expression, F-actin Cytoskeleton Rearrangement, and Cell Viability of Uninfected and Virus-Infected M0, M1, and M2 RAW264.7 Murine Macrophages

Alruwaili, Muhannad Falah 14 May 2018 (has links)
No description available.
2

[pt] CARACTERIZAÇÃO DE NANOPARTÍCULAS DE OURO SINTETIZADAS POR ABLAÇÃO A LASER PULSADO EM ÁGUA, E ANÁLISE DE CITOTOXICIDADE E MODULAÇÃO DA PRODUÇÃO DE ESPÉCIES REATIVAS DE OXIGÊNIO E NITROGÊNIO EM MACRÓFAGOS RAW 264.7 / [en] CHARACTERIZATION OF GOLD NANOPARTICLES SYNTHESIZED BY PULSED LASER ABLATION IN WATER, AND ANALYSIS OF CYTOTOXICITY AND MODULATION OF THE PRODUCTION OF REACTIVE OXYGEN AND NITROGEN SPECIES IN RAW 264.7 MACROPHAGES

MARIANA GISBERT JARDIM DOS SANTOS 15 December 2022 (has links)
[pt] A pandemia da COVID-19 instaurou inúmeras pesquisas sobre a doença, a qual foi atribuída à tempestade de citocinas. Embora, as vacinas sejam eficazes para combater a disseminação da COVID-19 e, recentemente, tenha sido aprovado pela ANVISA (Agência Nacional de Vigilância Sanitária) o fármaco antiviral Paxlovid (Trade Mark), no tratamento da COVID-19, estudos sobre formas de tratamento ainda são necessários. Dentre as novas estratégias terapêuticas, a utilização de nanopartículas de ouro (AuNPs) tem se destacado devido o potencial efeito antiinflamatório. O objetivo deste trabalho foi estudar as eventuais propriedades antiinflamatórias das AuNPs, sintetizadas por ablação a laser pulsado (PLA) em água, em macrófagos RAW 264.7. Ademais, o presente trabalho visou investigar a possível ligação entre o efeito imunomodulador das nanopartículas e os produtos secundários obtidos através da reação de redução da CO2 (CO2RR) ativada por PLA em água. Nesse sentido, foram analisados a proliferação, a citotoxicidade, os níveis das espécies reativas de oxigênio (EROs) e das espécies reativas de nitrogênio (ERNs) nos macrófagos RAW 264.7 submetidas ao tratamento com as AuNPs e expostas ao lipopolissacarídeo (LPS), o qual foi utilizado como agente precursor do processo inflamatório. Em conclusão, os resultados apontaram que AuNPs na concentração de 10 (micro)g/mL não tiveram caráter citotóxico e diminuíram as EROs e ERNs. As AuNPs demonstraram promissora atividade antiinflamatórias com reduzidos valores de citotoxicidade, o que aponta para uma futura aplicação clínica. / [en] With the advent of the COVID-19 pandemic, numerous studies on the disease were initiated, a disease originated from a cytokine storm. Although vaccines are effective in combating the spread of COVID-19 and, more recently, the antiviral drug Paxlovid (Trade Mark) has been approved by ANVISA (Brazilian Health Regulatory Agency) for the treatment of COVID-19, studies on forms of treatment are still needed. Among the new therapeutic strategies, the use of gold nanoparticles (AuNPs) has been in the spotlight due to their potential antiinflammatory effect. This work aims to study the potential anti-inflammatory properties of AuNPs, synthesized by pulsed laser ablation (PLA) in water, in RAW 264.7 macrophages. Furthermore, the present work aimed to investigate the possible connection between the immunomodulatory effect of the nanoparticles and the secondary products obtained through the CO2 reduction reaction (CO2RR) activated by PLA in water. In this sense, we analyzed the proliferation, cytotoxicity, levels of reactive oxygen species (ROS) and reactive nitrogen species (RNS) in RAW 264.7 macrophages subjected to treatment with AuNPs and exposed to lipopolysaccharide (LPS), which was used as a precursor agent of the inflammatory process. In conclusion, the results showed that the AuNPs at a concentration of 10 (micro)g/mL did not have a cytotoxic character and reduced ROS and RNS. AuNPs demonstrated promising anti-inflammatory activity with reduced cytotoxicity values, which points to future clinical applications.

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