Aplicações de espectrometria de massas ambiente em metabolômica clínica
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/10524 |
Resumo: | Most clinical biofluids studies are based on plasma/serum and urine, which are more free and representative models of general metabolism. Each of these fluids has a unique matrix, comprising different levels of proteins and metabolites. Therefore, it is important to optimize sample preparation and analytical methods to achieve comprehensive coverage of the analytes present in these samples. In this context, Ambient Mass Spectrometry (AMS) arises, which is a family of desorption and ionization techniques that have revolutionized the way of obtaining ions in mass spectrometry. These techniques share the ability to generate ions in the gas phase directly from untreated samples, reducing or virtually eliminating analyte extraction and prior separation. Substrate Electrospray Ionization are ionization techniques in AMS, which comprise, for example, Paper spray ionization (PSI) and Probe electrospray ionization (PESI). In this study, two analytical approaches are proposed in clinical metabolomics using PSI and, also, the development of a new Substrate Electrospray Ionization. The first approach is the use of a paper coated by a molecularly printed polymer (MIP) as a substrate for PSI in metabolite analysis: dopamine, sarcosine and butyric acid in artificial urine. This new substrate was highly selective for the desired targets, in addition to minimizing the effects of common ion suppression on PSI. In addition, calibration curves with R2> 0.99 and limits of detection (LOD) and quantification (LOQ) in the ppb range were obtained. In addition, success was obtained when using this technique for the analysis of dopamine in a real sample. In the second approach, PSI was combined with a chemometric approach called Interval-successive projections algorithm linear discriminant analysis (iSPA-LDA) to detect lipid biomarkers of cervical cancer using unprepared blood plasma lipids. A total of 86 blood plasma samples from different women were collected, including 37 cancer controls and 49 healthy controls, where 8 lipids were found as possible biomarkers with an overall precision of 77%. The results show the potential of PSI associated with multivariate analysis as a complementary tool for the screening or diagnosis of cervical. It is the application of PSI in plasma samples in a non-targeted lipidic approach, with the objective of discovering biomarkers of cervical cancer. The final approach was to use graphite as a substrate for ESI. The effect of voltage, probe angle and sample volume were evaluated. The ionization capacity of several analytes, including a protein, has also been evaluated, and creatinine quantification tests have been performed on real urine samples. The ESI graphite technique was optimized and obtained excellent ionization of the analytes, not presenting ionic suppression. It was possible to determine the amount of creatinine present in the samples tested and all were within the established limits. In addition, the technique was employed in mouse brain analysis and through these analyzes combined with Principal Component Analysis (PCA) it was possible to differentiate different regions of the brain and separate the samples in male and female. With this, the graphite ESI technique proved very efficient to be used in metabolomic approaches. |
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Vaz, Boniek Gontijohttp://lattes.cnpq.br/7814534710550639Vaz, Boniek GontijoChaves, Andrea RodriguesDuarte, Gabriela Rodrigues MendesGil, Eric de SouzaPinto, Mauro Cunha Xavierhttp://lattes.cnpq.br/9449068239299129Andrade, Thais Pontes Pereira Mendes de2020-09-02T11:53:06Z2020-09-02T11:53:06Z2019-12-07MENDES, T. P. P. Aplicações de espectrometria de massas ambiente em metabolômica clínica. 2019. 126 f. Tese (Doutorado em Química) - Universidade Federal de Goiás, Goiânia, 2019.http://repositorio.bc.ufg.br/tede/handle/tede/10524ark:/38995/0013000008fw6Most clinical biofluids studies are based on plasma/serum and urine, which are more free and representative models of general metabolism. Each of these fluids has a unique matrix, comprising different levels of proteins and metabolites. Therefore, it is important to optimize sample preparation and analytical methods to achieve comprehensive coverage of the analytes present in these samples. In this context, Ambient Mass Spectrometry (AMS) arises, which is a family of desorption and ionization techniques that have revolutionized the way of obtaining ions in mass spectrometry. These techniques share the ability to generate ions in the gas phase directly from untreated samples, reducing or virtually eliminating analyte extraction and prior separation. Substrate Electrospray Ionization are ionization techniques in AMS, which comprise, for example, Paper spray ionization (PSI) and Probe electrospray ionization (PESI). In this study, two analytical approaches are proposed in clinical metabolomics using PSI and, also, the development of a new Substrate Electrospray Ionization. The first approach is the use of a paper coated by a molecularly printed polymer (MIP) as a substrate for PSI in metabolite analysis: dopamine, sarcosine and butyric acid in artificial urine. This new substrate was highly selective for the desired targets, in addition to minimizing the effects of common ion suppression on PSI. In addition, calibration curves with R2> 0.99 and limits of detection (LOD) and quantification (LOQ) in the ppb range were obtained. In addition, success was obtained when using this technique for the analysis of dopamine in a real sample. In the second approach, PSI was combined with a chemometric approach called Interval-successive projections algorithm linear discriminant analysis (iSPA-LDA) to detect lipid biomarkers of cervical cancer using unprepared blood plasma lipids. A total of 86 blood plasma samples from different women were collected, including 37 cancer controls and 49 healthy controls, where 8 lipids were found as possible biomarkers with an overall precision of 77%. The results show the potential of PSI associated with multivariate analysis as a complementary tool for the screening or diagnosis of cervical. It is the application of PSI in plasma samples in a non-targeted lipidic approach, with the objective of discovering biomarkers of cervical cancer. The final approach was to use graphite as a substrate for ESI. The effect of voltage, probe angle and sample volume were evaluated. The ionization capacity of several analytes, including a protein, has also been evaluated, and creatinine quantification tests have been performed on real urine samples. The ESI graphite technique was optimized and obtained excellent ionization of the analytes, not presenting ionic suppression. It was possible to determine the amount of creatinine present in the samples tested and all were within the established limits. In addition, the technique was employed in mouse brain analysis and through these analyzes combined with Principal Component Analysis (PCA) it was possible to differentiate different regions of the brain and separate the samples in male and female. With this, the graphite ESI technique proved very efficient to be used in metabolomic approaches.A maioria dos estudos clínicos de biofluídos na literatura são baseados em plasma/soro e urina, pois são mais facilmente obtidos e considerados representativos do comportamento metabólico geral. Cada um desses fluídos tem uma matriz única, compreendendo diferentes níveis de proteínas e metabólitos. Por isso, é importante otimizar a preparação de amostras e métodos analíticos para alcançar uma cobertura abrangente dos analitos presentes nessas amostras. Nesse contexto, surge a espectrometria de massas ambiente (AMS), que é uma família de técnicas de dessorção e ionização que revolucionaram o modo de obter íons na espectrometria de massas. Essas técnicas compartilham a capacidade de geração de íons na fase gasosa diretamente a partir de amostras não tratadas, reduzindo ou praticamente eliminando a extração de analito e a separação prévia. Substrate Electrospray Ionization são técnicas de ionização da AMS, que compreendem, por exemplo, Paper spray ionization (PSI) e Probe electrospray ionization (PESI). Neste trabalho são propostas duas abordagens analíticas em metabolômica clínica utilizando PSI e, também, o desenvolvimento de um novo Substrate Electrospray Ionization. A primeira abordagem trata-se da utilização de um papel recoberto por um polímero molecularmente impresso (MIP) como substrato para o PSI em análise de metabolitos: dopamina, sarcosina e ácido butírico, em urina artificial. Este novo substrato mostrou-se altamente seletivo para os alvos desejados, além de minimizar efeitos de supressão iônica comum no PSI. Além disso, obteve-se curvas de calibração com R2>0,99 e limites de detecção (LOD) e quantificação (LOQ) na faixa de ppb. Ademais, obteve-se sucesso ao utilizar essa técnica para a análise de dopamina em uma amostra real. Na segunda abordagem, utilizou-se PSI combinado com uma abordagem quimiométrica chamada Interval-successive projections algorithm linear discriminant analysis (iSPA-LDA) para detectar biomarcadores lipídicos do câncer do colo do útero usando lipídios do plasma sanguíneo sem pré-tratamento. Um total de 86 amostras de plasma sanguíneo de diferentes mulheres foram coletadas, incluindo 37 controles cancerígenos e 49 controles saudáveis, onde 8 lipídios foram encontrados como possíveis biomarcadores com uma precisão geral de 77%. Os resultados obtidos mostram o potencial da PSI associada à análise multivariada como ferramenta complementar para rastreamento ou diagnóstico do câncer do colo do útero. Trata-se da aplicação do PSI em amostras de plasma numa abordagem lipidômica não-direcionada, com o objetivo de descobrir biomarcadores do câncer de colo do útero. A última abordagem teve o objetivo de utilizar o grafite como substrato para o ESI. Foram avaliados o efeito de voltagem, ângulo da probe e volume da amostra. Ainda foram avaliados a capacidade de ionização de diversos analitos, incluindo uma proteína, e realizados testes de quantificação de creatinina em amostras reais de urina. A técnica ESI grafite foi otimizada e obteve excelente ionização dos analitos, não apresentando supressão iônica. Conseguiu-se determinar a quantidade de creatinina presente nas amostras testadas e todas ficaram dentro dos limites estabelecidos. Além disso, a técnica foi empregada na análise de cérebro de camundongos e através dessas análises combinadas com Principal Component Analysis (PCA) foi possível diferenciar diferentes regiões do cérebro e separar as amostras em macho e fêmea. Com isso, a técnica ESI grafite se mostrou muito eficiente para ser utilizada em abordagens metabolômicas.Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2020-09-02T11:52:24Z No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Tese - Thais Pontes Pereira Mendes de Andrade - 2019.pdf: 3905926 bytes, checksum: e3dfcbd954d14e05498e6f427ace254b (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2020-09-02T11:53:06Z (GMT) No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Tese - Thais Pontes Pereira Mendes de Andrade - 2019.pdf: 3905926 bytes, checksum: e3dfcbd954d14e05498e6f427ace254b (MD5)Made available in DSpace on 2020-09-02T11:53:06Z (GMT). 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dc.title.pt_BR.fl_str_mv |
Aplicações de espectrometria de massas ambiente em metabolômica clínica |
title |
Aplicações de espectrometria de massas ambiente em metabolômica clínica |
spellingShingle |
Aplicações de espectrometria de massas ambiente em metabolômica clínica Andrade, Thais Pontes Pereira Mendes de Espectrometria de massas ambiente Lipidômica Metabolômica Paper spray ionization Substrate electrospray ionization Lipidomics Metabolomics Ambient mass spectrometry CIENCIAS EXATAS E DA TERRA::QUIMICA::FISICO-QUIMICA |
title_short |
Aplicações de espectrometria de massas ambiente em metabolômica clínica |
title_full |
Aplicações de espectrometria de massas ambiente em metabolômica clínica |
title_fullStr |
Aplicações de espectrometria de massas ambiente em metabolômica clínica |
title_full_unstemmed |
Aplicações de espectrometria de massas ambiente em metabolômica clínica |
title_sort |
Aplicações de espectrometria de massas ambiente em metabolômica clínica |
author |
Andrade, Thais Pontes Pereira Mendes de |
author_facet |
Andrade, Thais Pontes Pereira Mendes de |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Vaz, Boniek Gontijo |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7814534710550639 |
dc.contributor.referee1.fl_str_mv |
Vaz, Boniek Gontijo |
dc.contributor.referee2.fl_str_mv |
Chaves, Andrea Rodrigues |
dc.contributor.referee3.fl_str_mv |
Duarte, Gabriela Rodrigues Mendes |
dc.contributor.referee4.fl_str_mv |
Gil, Eric de Souza |
dc.contributor.referee5.fl_str_mv |
Pinto, Mauro Cunha Xavier |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/9449068239299129 |
dc.contributor.author.fl_str_mv |
Andrade, Thais Pontes Pereira Mendes de |
contributor_str_mv |
Vaz, Boniek Gontijo Vaz, Boniek Gontijo Chaves, Andrea Rodrigues Duarte, Gabriela Rodrigues Mendes Gil, Eric de Souza Pinto, Mauro Cunha Xavier |
dc.subject.por.fl_str_mv |
Espectrometria de massas ambiente Lipidômica Metabolômica |
topic |
Espectrometria de massas ambiente Lipidômica Metabolômica Paper spray ionization Substrate electrospray ionization Lipidomics Metabolomics Ambient mass spectrometry CIENCIAS EXATAS E DA TERRA::QUIMICA::FISICO-QUIMICA |
dc.subject.eng.fl_str_mv |
Paper spray ionization Substrate electrospray ionization Lipidomics Metabolomics Ambient mass spectrometry |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA::FISICO-QUIMICA |
description |
Most clinical biofluids studies are based on plasma/serum and urine, which are more free and representative models of general metabolism. Each of these fluids has a unique matrix, comprising different levels of proteins and metabolites. Therefore, it is important to optimize sample preparation and analytical methods to achieve comprehensive coverage of the analytes present in these samples. In this context, Ambient Mass Spectrometry (AMS) arises, which is a family of desorption and ionization techniques that have revolutionized the way of obtaining ions in mass spectrometry. These techniques share the ability to generate ions in the gas phase directly from untreated samples, reducing or virtually eliminating analyte extraction and prior separation. Substrate Electrospray Ionization are ionization techniques in AMS, which comprise, for example, Paper spray ionization (PSI) and Probe electrospray ionization (PESI). In this study, two analytical approaches are proposed in clinical metabolomics using PSI and, also, the development of a new Substrate Electrospray Ionization. The first approach is the use of a paper coated by a molecularly printed polymer (MIP) as a substrate for PSI in metabolite analysis: dopamine, sarcosine and butyric acid in artificial urine. This new substrate was highly selective for the desired targets, in addition to minimizing the effects of common ion suppression on PSI. In addition, calibration curves with R2> 0.99 and limits of detection (LOD) and quantification (LOQ) in the ppb range were obtained. In addition, success was obtained when using this technique for the analysis of dopamine in a real sample. In the second approach, PSI was combined with a chemometric approach called Interval-successive projections algorithm linear discriminant analysis (iSPA-LDA) to detect lipid biomarkers of cervical cancer using unprepared blood plasma lipids. A total of 86 blood plasma samples from different women were collected, including 37 cancer controls and 49 healthy controls, where 8 lipids were found as possible biomarkers with an overall precision of 77%. The results show the potential of PSI associated with multivariate analysis as a complementary tool for the screening or diagnosis of cervical. It is the application of PSI in plasma samples in a non-targeted lipidic approach, with the objective of discovering biomarkers of cervical cancer. The final approach was to use graphite as a substrate for ESI. The effect of voltage, probe angle and sample volume were evaluated. The ionization capacity of several analytes, including a protein, has also been evaluated, and creatinine quantification tests have been performed on real urine samples. The ESI graphite technique was optimized and obtained excellent ionization of the analytes, not presenting ionic suppression. It was possible to determine the amount of creatinine present in the samples tested and all were within the established limits. In addition, the technique was employed in mouse brain analysis and through these analyzes combined with Principal Component Analysis (PCA) it was possible to differentiate different regions of the brain and separate the samples in male and female. With this, the graphite ESI technique proved very efficient to be used in metabolomic approaches. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-12-07 |
dc.date.accessioned.fl_str_mv |
2020-09-02T11:53:06Z |
dc.date.available.fl_str_mv |
2020-09-02T11:53:06Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MENDES, T. P. P. Aplicações de espectrometria de massas ambiente em metabolômica clínica. 2019. 126 f. Tese (Doutorado em Química) - Universidade Federal de Goiás, Goiânia, 2019. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/10524 |
dc.identifier.dark.fl_str_mv |
ark:/38995/0013000008fw6 |
identifier_str_mv |
MENDES, T. P. P. Aplicações de espectrometria de massas ambiente em metabolômica clínica. 2019. 126 f. Tese (Doutorado em Química) - Universidade Federal de Goiás, Goiânia, 2019. ark:/38995/0013000008fw6 |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/10524 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
80 |
dc.relation.confidence.fl_str_mv |
500 500 500 |
dc.relation.department.fl_str_mv |
30 |
dc.relation.cnpq.fl_str_mv |
1092 |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.publisher.program.fl_str_mv |
Programa de Pós-graduação em Química (IQ) |
dc.publisher.initials.fl_str_mv |
UFG |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Instituto de Química - IQ (RG) |
publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFG instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
instacron_str |
UFG |
institution |
UFG |
reponame_str |
Repositório Institucional da UFG |
collection |
Repositório Institucional da UFG |
bitstream.url.fl_str_mv |
http://repositorio.bc.ufg.br/tede/bitstreams/6b71ae2a-851c-4318-b03d-b67a6d08b708/download http://repositorio.bc.ufg.br/tede/bitstreams/2b620b6c-cc57-4e41-91b4-3432e0875224/download http://repositorio.bc.ufg.br/tede/bitstreams/8432c23b-e658-4c7f-bcf3-4dab6d8abd64/download |
bitstream.checksum.fl_str_mv |
8a4605be74aa9ea9d79846c1fba20a33 e39d27027a6cc9cb039ad269a5db8e34 e3dfcbd954d14e05498e6f427ace254b |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFG - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
tasesdissertacoes.bc@ufg.br |
_version_ |
1811721450827022336 |