Introdução: A saliva total (ST) além do produto das glândulas salivares estará acrescida de resíduos da descamação celular das mucosas oral, cavidade nasal, faringe; fluidos gengivais, leucócitos, bactérias, restos alimentares, hormônios, drogas e etc. Entre outras características está sua capacidade protetora e cicatrizante. Objetivo: Avaliar e verificar a atividade das enzimas, alfa amilase e peroxidases; ácido siálico, concentração proteica de mucinas e proteínas totais; pH e fluxo na ST não estimulada de recém nascido a termo (RNT) em aleitamento materno exclusivo. Casuística e Metodologia: As amostras salivares foram colhidas de 22 RNT em aleitamento materno exclusivo; do alojamento conjunto, do Hospital Universitário da Universidade de São Paulo (HU-USP), no período de setembro a outubro de 2017, após assinatura de termo de consentimento livre e esclarecido pelos responsáveis. Critérios de Inclusão: RNT saudáveis, em aleitamento materno exclusivo, com peso adequado para idade gestacional (AIG). Critérios de Exclusão: Portadores de doença sistêmica, Malformação Congênita, Doenças Neurológicas, Sepse neonatal, Distúrbios metabólicos de difícil correção (hipoglicemia refratária),Distúrbios hidroeletrolíticos, Distúrbios acido/básicos, Doenças hemolíticas, Infecções Congênitas do grupo ZTORCHS. Resultados: Verificamos a presença de todos os componentes do estudo (alfa amilase, peroxidases; ácido siálico, concentração proteica de mucinas e proteínas totais, pH e fluxo), em quantidade pequena, justificada pela imaturidade funcional das glândulas salivares, sem diferenças estatísticas entre elas. Verificamos para esta amostra diferenças estatisticamente significante quanto à: idade das mães de primeira gestação; a evolução das notas do índice Apgar de primeiro minuto para as notas do quinto minuto de vida extrauterina; como elemento mais significativo dos resultados, está a quantidade aumentada de alfa amilase para os recém nascidos de nota oito na índice de Apgar do primeiro minuto. Conclusão: A saliva total embora sofra modificações quantitativas e qualitativas com o crescimento desenvolvimento da criança, neste precoce período neonatal reflete não só seu caráter protetor e indiretamente imunológico; o funcionamento glandular; assim como através da quantidade aumentada de alfa amilase nos recém nascidos com nota oito do índice de Apgar, mostrando a ação do Sistema Nervoso Simpático e Parassimpático, uma vez que as glândulas salivares reagem de forma direta a seus estímulos / Introduction: The total saliva (TS) in addition to the salivary gland product will be increased by residues of the cellular desquamation of the oral mucosa, nasal cavity, pharynx; gingival fluids, leukocytes, bacteria, food debris, hormones, drugs, and so on. Among other characteristics is its protective and healing capacity. Objective: To evaluate and verify the activity of the enzymes, alpha amylase and peroxidases; sialic acid, protein concentration of mucins and total proteins; pH and flow in the unstimulated ST of term newborn (TNF) in exclusive breastfeeding. Casuistry and Methodology: Salivary samples were collected from 22 TNF in exclusive breastfeeding; of the University Hospital of the University of São Paulo (HU-USP), from September to October 2017, after signing an informed consent form. Inclusion Criteria: RNT healthy, exclusively breastfed, with adequate weight for gestational age (AIG). Exclusion Criteria: Systemic disease carriers, Congenital malformation, Neurological diseases, Neonatal sepsis, Metabolic disorders of difficult correction (hypoglycemia refractory), Hydroelectrolytic disorders, Acid / basic disorders, Hemolytic diseases, Congenital infections of the ZTORCHS group. Results: We verified the presence of all components of the study (alpha amylase, peroxidases, sialic acid, protein concentration of mucins and total proteins, pH and flow), in a small amount, justified by the functional immaturity of the salivary glands, without statistical differences between them . We verified for this sample statistically significant differences as to: the age of the mothers of first gestation; the evolution of the first-minute Apgar score notes to the fifth-minute notes of extrauterine life; as the most significant element of the results is the increased amount of alpha amylase for infants of note eight in the first minute Apgar score. Conclusion: Although total saliva undergoes quantitative and qualitative changes with the child\'s growth development, in this early neonatal period it reflects not only its protective and indirectly immunological nature; glandular functioning; as well as through the increased amount of alpha amylase in newborns with an eight note Apgar score, showing the action of the Sympathetic and Parasympathetic Nervous System, since the salivary glands react directly to their stimuli

Submitted by (lucia.rodrigues@ufrpe.br) on 2017-02-13T12:58:51Z No. of bitstreams: 1 Aline de Andrade Alves.pdf: 1102339 bytes, checksum: b203a6432ccdaef9ba8b28ee763a99f6 (MD5) / Made available in DSpace on 2017-02-13T12:58:51Z (GMT). No. of bitstreams: 1 Aline de Andrade Alves.pdf: 1102339 bytes, checksum: b203a6432ccdaef9ba8b28ee763a99f6 (MD5) Previous issue date: 2012-02-27 / The organofunctionalized silica was used as the solid support in the study of photophysical properties of lanthanides, in particular the Eu (III) ions, which functions as structural probe has been thoroughly discussed seeking new technological applications. In this study, were synthesized two novel organofunctionalized silica matrices and new lanthanide complexes containing sialic acid as ligand. These compounds were characterized via luminescence spectroscopy, infrared spectroscopy, thermal analysis and elemental analysis. Two routes were used to obtain functionalized silica with thenoyltrifluoracetonate. The elemental analysis and infrared spectroscopy data suggest the minimum structures proposed. The europium complex with sialic acid showed weak luminescence, which was expected due to even have low molar extinction coefficient. The solid phase synthesized consisting of silica coordinated to europium complex with thenoyltrifluoracetonate was sensitive to sialic acid. / A utilização da sílica organofuncionalizada como suporte sólido no estudo das propriedades fotofísicas dos íons lantanídeos em especial o íon Eu (III) que funciona como sonda estrutural, tem sido bastante discutido visando novas aplicações tecnológicas. Neste trabalho, foram sintetizadas duas matrizes inéditas de sílica organofuncionalizadas e novos complexos de lantanídeo contendo como ligante o ácido siálico. Esses compostos foram caracterizados via espectroscopia eletrônica de luminescência, espectroscopia na região do infravermelho, análise térmica e análise elementar. Foram utilizadas duas Rotas para obtenção da sílica funcionalizada com tenoiltrifluoroacetonato. Os dados de análise elementar e espectroscopia na região de infravermelho sugerem as estruturas mínimas propostas. Os complexos de európio com o ácido siálico apresentaram fraca intensidade de luminescência, o que já era esperado devido ao mesmo ter baixo coeficiente de extinção molar. A fase sólida sintetizada, constituída por sílica funcionalizada e coordenada a um complexo de tenoiltrifluoracetonato e európio é sensível ao ácido siálico.

Introdução: A saliva total (ST) além do produto das glândulas salivares estará acrescida de resíduos da descamação celular das mucosas oral, cavidade nasal, faringe; fluidos gengivais, leucócitos, bactérias, restos alimentares, hormônios, drogas e etc. Entre outras características está sua capacidade protetora e cicatrizante. Objetivo: Avaliar e verificar a atividade das enzimas, alfa amilase e peroxidases; ácido siálico, concentração proteica de mucinas e proteínas totais; pH e fluxo na ST não estimulada de recém nascido a termo (RNT) em aleitamento materno exclusivo. Casuística e Metodologia: As amostras salivares foram colhidas de 22 RNT em aleitamento materno exclusivo; do alojamento conjunto, do Hospital Universitário da Universidade de São Paulo (HU-USP), no período de setembro a outubro de 2017, após assinatura de termo de consentimento livre e esclarecido pelos responsáveis. Critérios de Inclusão: RNT saudáveis, em aleitamento materno exclusivo, com peso adequado para idade gestacional (AIG). Critérios de Exclusão: Portadores de doença sistêmica, Malformação Congênita, Doenças Neurológicas, Sepse neonatal, Distúrbios metabólicos de difícil correção (hipoglicemia refratária),Distúrbios hidroeletrolíticos, Distúrbios acido/básicos, Doenças hemolíticas, Infecções Congênitas do grupo ZTORCHS. Resultados: Verificamos a presença de todos os componentes do estudo (alfa amilase, peroxidases; ácido siálico, concentração proteica de mucinas e proteínas totais, pH e fluxo), em quantidade pequena, justificada pela imaturidade funcional das glândulas salivares, sem diferenças estatísticas entre elas. Verificamos para esta amostra diferenças estatisticamente significante quanto à: idade das mães de primeira gestação; a evolução das notas do índice Apgar de primeiro minuto para as notas do quinto minuto de vida extrauterina; como elemento mais significativo dos resultados, está a quantidade aumentada de alfa amilase para os recém nascidos de nota oito na índice de Apgar do primeiro minuto. Conclusão: A saliva total embora sofra modificações quantitativas e qualitativas com o crescimento desenvolvimento da criança, neste precoce período neonatal reflete não só seu caráter protetor e indiretamente imunológico; o funcionamento glandular; assim como através da quantidade aumentada de alfa amilase nos recém nascidos com nota oito do índice de Apgar, mostrando a ação do Sistema Nervoso Simpático e Parassimpático, uma vez que as glândulas salivares reagem de forma direta a seus estímulos / Introduction: The total saliva (TS) in addition to the salivary gland product will be increased by residues of the cellular desquamation of the oral mucosa, nasal cavity, pharynx; gingival fluids, leukocytes, bacteria, food debris, hormones, drugs, and so on. Among other characteristics is its protective and healing capacity. Objective: To evaluate and verify the activity of the enzymes, alpha amylase and peroxidases; sialic acid, protein concentration of mucins and total proteins; pH and flow in the unstimulated ST of term newborn (TNF) in exclusive breastfeeding. Casuistry and Methodology: Salivary samples were collected from 22 TNF in exclusive breastfeeding; of the University Hospital of the University of São Paulo (HU-USP), from September to October 2017, after signing an informed consent form. Inclusion Criteria: RNT healthy, exclusively breastfed, with adequate weight for gestational age (AIG). Exclusion Criteria: Systemic disease carriers, Congenital malformation, Neurological diseases, Neonatal sepsis, Metabolic disorders of difficult correction (hypoglycemia refractory), Hydroelectrolytic disorders, Acid / basic disorders, Hemolytic diseases, Congenital infections of the ZTORCHS group. Results: We verified the presence of all components of the study (alpha amylase, peroxidases, sialic acid, protein concentration of mucins and total proteins, pH and flow), in a small amount, justified by the functional immaturity of the salivary glands, without statistical differences between them . We verified for this sample statistically significant differences as to: the age of the mothers of first gestation; the evolution of the first-minute Apgar score notes to the fifth-minute notes of extrauterine life; as the most significant element of the results is the increased amount of alpha amylase for infants of note eight in the first minute Apgar score. Conclusion: Although total saliva undergoes quantitative and qualitative changes with the child\'s growth development, in this early neonatal period it reflects not only its protective and indirectly immunological nature; glandular functioning; as well as through the increased amount of alpha amylase in newborns with an eight note Apgar score, showing the action of the Sympathetic and Parasympathetic Nervous System, since the salivary glands react directly to their stimuli

Sialylation is an important carbohydrate modification of glycoconjugates, which introduces sialic acids (SA). The relatively large nine-carbon, negatively charged sugars are typically located at the termini of carbohydrate chains. SA's are often required for functionally important molecular and cellular interactions including virus-host interactions, tumor progression and malignancy, immune system development and function, and nervous system development and function. However, the study of sialylation in vertebrates, including man, encounters serious obstacles associated with the complexity of vertebrates' biology and limitations of available experimental approaches. Drosophila is a useful model system with many advantages including quick generation time, a large number of progeny, simplified glycosylation and neurophysiology, and ease of genetic manipulations. The primary focus of this thesis is on the functions of Drosophila melanogaster CMP sialic acid synthetase (DmCSAS) and sialyltransferase (DSiaT) in the central nervous system (CNS). A combination of genetic, immunostaining, and neurobiology approaches were used to characterize the functions of DmCSAS and DSiaT in Drosophila. This investigation revealed the expression of DmCSAS and suggested that it plays an important role in a specialized and developmentally regulated process in the nervous system of Drosophila. Further experiments examined sub-cellular localization of DmCSAS revealing that this protein has a complex mostly Golgi-associated distribution within the cell in vivo. I discovered a novel link between Drosophila sialylation and circadian rhythm regulation. I also characterized the electrophysiological phenotypes of DmCSAS mutants and compared them to the corresponding defects associated with DSiaT mutations. My experiments also revealed that the relationship between DmCSAS and DSiaT are more complex than originally thought; these genes may have independent functions while also participating in the same pathway. Taken together, these results elucidate the sialylation pathway in Drosophila and shed more light on the role of sialylation in the nervous system. My experiments provide a unique evolutionary perspective on the sialylation pathway in animals and suggest that the neural function of SA in Drosophila can be conserved in vertebrates, including humans.

Glycosylation in vertebrates has a main role in many important processes such as cell transport, protein folding, secretion of proteins etc. What function has glycosylation in arthropods, for example in ticks, is rarely studied. This work was focused on analysis of N-glycans in tick tissues, namely in Ixodes ricinus and Dermacentor marginatus. High-mannose glycans as well as complex glycans with or without core-fucosylation were identified in this study.Furthermore several sialylated glycans were present in the studied samples. Sialic acid is found in arthropods rarely and this is the first study which directly proves its presence in ticks using mass spectrometry.

No description available.

Abstract Salla disease (SD) is a rare lysosomal storage disorder, belonging to the Finnish disease heritage. The condition leads to intellectual disabilities. Two main categories of the disease have been identified – a conventional subtype and a severe subtype. The gene locus of SD has been assigned to a restricted region on the long arm of chromosome 6. The gene SLC17A5 is responsible for lysosomal-membrane sialic acid transport. The objective of this study was to describe the neurocognitive developmental spectrum of SD in a long follow-up study. In the original study (1997–1999), the sample consisted of 41 Finnish patients with Salla disease. They were examined by a paediatric neurologist, a psychologist and a speech therapist. The follow-up study (2010–2012) concerned of 27 (66%) patients from the original SD patient sample. The study included neurological and neuropsychological investigations. A case study of a mildly affected female patient was also reported. In the first study, the typical neurocognitive profile of SD was outlined and the different phenotypes confirmed. The neurocognitive profile of SD consisted of a strong motor handicap, but also well-developed skills in verbal comprehension and interaction. In the follow-up study, the main finding was that the verbal skills related to comprehension did not diminish over time. However, the skills that demanded productive speech were worsened by both dyspraxia and dysarthria, markers of dysfunction of the cerebellum. The neurocognitive and neurological status of the mildly affected female patient remained stable during the long follow-up time. In addition the MRI findings revealed mild dysfunction. The results indicate that the neurocognitive deficits related to SD are clear in childhood, but the illness does not have a rapid progressive nature after teenage years. The motor handicap is strong but the cognitive skills related to verbal comprehension, and interactive skills, do not deteriorate in adulthood. Four different neurodevelopmental periods can be outlined. / Tiivistelmä Tämän tutkimuksen tavoitteena oli kuvata Sallan tautiin liittyvä neurokognitiivisen kehityksen kulku pitkän seurantatutkimuksen aikana. Sallan tauti, erittäin harvinainen lysosomaalinen kertymäsairaus, kuuluu suomalaiseen tautiperimään. Nämä perinnölliset sairaudet ovat Suomessa yleisempiä kuin muissa maissa. Sallan tauti etenee älylliseen kehitysvammaisuuteen. Kaksi taudin päätyyppiä, tavanomainen ja vakava-asteinen fenotyyppi, on tunnistettu. Sallan taudin aiheuttavan geenin sijainti on paikallistettu kromosomiin 6. SLC17A5-geeni vastaa sialihapon kuljetuksesta solujen lysosomeissa. Ensimmäisen tutkimuksen (1997–1999) aineisto koostui 41 suomalaisesta Sallan tautia sairastavasta potilaasta. Neurologi, psykologi sekä puheterapeutti tutkivat jokaisen potilaan. Seuranta-aineisto (2010–2012) koostui 27 (66 %) potilaasta. Tutkimukseen kuului neurologin sekä neuropsykologin tutkimus. Lieväoireisen naispotilaan kehityskulku julkaistiin erillisenä tapaustutkimuksena. Ensimmäisessä tutkimuksessa selvitettiin Sallan taudille ominainen neurokognitiivinen profiili, lisäksi vahvistettiin kahden eri fenotyypin olemassaolo. Neurokognitiivisiin tyyppioireisiin kuuluivat vahvat motoriset defektit, mutta toisaalta hyvin kehittyneet kielelliset taidot puheen ymmärtämisen osalta. Myös vuorovaikutustaidot olivat vahvat. Seurantatutkimuksen päätulos oli puheen ymmärtämisen taitojen säilyminen taudin edetessä. Puheen tuottamiseen liittyvien vaikeuksien osalta sekä dyspraksia että dysartria heikensivät kielellistä toimintakykyä. Nämä kielelliset defektit liittyvät pikkuaivojen toimintahäiriöihin. Lieväoireisen naispotilaan neurologiset ja neurokognitiiviset löydökset eivät olleet edenneet pitkän seurantatutkimuksen aikana. Myös aivojen kuvantamistutkimuksen tulokset olivat lievät. Sallan tautiin liittyvät neurokognitiiviset muutokset ovat selkeät lapsuusiässä, mutta sairauden luonne aikuisiällä ei ole nopeasti etenevä. Motorisen toimintakyvyn defektit ovat vahvat, mutta kielellisen ymmärtämisen ja vuorovaikutuksen taidot eivät heikkene aikuisilla potilailla. Taudista voidaan erotella neljä erilaista kehityksellistä vaihetta.

In der vorliegenden Arbeit diente das Kapsid der Bakteriophage Qbeta als multivalentes Gerüst und ermöglichte die Bildung eines monodispersen multivalenten Systems, welches mit Homopropargylglycin als unnatürliche Aminosäure modifiziert wurde. Das so eingeführte Alkin ermöglichte kupferkatalysierte Alkin-Azid-Cycloaddition zur Anbindung von Sialinsäuregrupen. Die entsprechende Synthese der hierzu kompatiblen Azid-modifizierten Sialinsäurederivate war eine der Hauptaufgaben dieser Arbeit. Zu diesem Zweck wurde das einfach zugängliche 5-N-Acetyladamantanylthiosialosid als Glykosylierungsdonor in der alpha-selektiven Synthese von Sialosiden evaluiert. Eine effiziente Aktivierung dieses Donors wurde unter optimierten Bedingungen bei -78°C mit N-Iodsuccinimid und Trifluormethansulfonsäure erreicht, was zu hohen alpha-Selektivitäten und Gesamtausbeuten der gewünschten Sialoside führte. Insbesondere Azidoethylenglykol-verknüpfte Sialinsäuren wurden synthetisiert, die für nachfolgende Biokonjugationsreaktionen an das Qbeta-Kapsid verwendet wurden. Die so dargestellten Sialinsäure-modifizierten Qbeta-Kapsidpartikel wurden dann eingehend mit Hilfe mehrerer biophysikalischer und biologischer Tests hinsichtlich ihrer Fähigkeit an Hämagglutinin zu binden und eine Influenza-Infektion zu inhibieren charakterisiert. Niedrige nanomolare Affinitäten wurden in diesen Assays gemessen. Eine sehr effiziente Infektionshemmung in vergleichbaren Konzentrationsbereichen konnte in einem in vitro Zell-, sowie einem in vivo Maus- als auch einem menschlichen ex vivo Modellsystem beobachtet werden. Verschiedene pathologisch relevante Influenzastämme konnten über die hier vorgestellte Strategie ebenfalls gebunden werden. Die monodisperse und definierte Struktur des Qbeta-Gerüsts erlaubte es außerdem ein theoretisches Modell der zugrundeliegenden Bindungsmodi zu erstellen. / In this thesis, the bacteriophage Qbeta capsid served as a multivalent scaffold and facilitated the generation of a monodisperse multivalent system which was modified with homopropargylglycine as an unnatural amino acid. The introduced alkyne enabled copper-catalyzed alkyne-azide cycloaddition to attach sialic acid groups. The corresponding synthesis of the compatible azide-modified sialic acid derivatives was one of the main tasks of this work. For this purpose, the straightforwardly accessible 5-N-acetyladamantanyl thiosialoside was evaluated as a glycosylation donor in the alpha-selective synthesis of sialosides. Efficient activation of this donor was achieved under optimized conditions at -78°C with N-iodosuccinimide and trifluoromethanesulfonic acid which led to high alpha selectivities and overall yields of the desired sialosides. Particularly azidoethylene glycol-linked sialic acids were synthesized which were used for subsequent bioconjugation reactions to the Qbeta capsid. These synthesized sialic acid-modified Qbeta capsid particles were then thoroughly characterized by multiple biophysical and biological assays regarding their ability to bind to hemagglutinin and to inhibit influenza infection. Low nanomolar affinities were measured in these assays. A very efficient infection inhibition in a comparable concentration range was observed in in vitro cellular, in vivo mouse and ex vivo human model systems. Several pathologically relevant influenza strains could also be bound with the strategy presented here. The monodisperse and defined structure of the Qbeta scaffold additionally allowed for the establishment of a theoretical model describing the underlying binding modes.

Sialinsäuren sind Teil der äußersten Komponente der Glykokalyx aller Wirbeltiere. Als solche sind sie grundlegende Marker in physiologischen und pathologischen Prozessen. Der „Hauptregulator“ der Sialinsäure-Biosynthese ist die bifunktionelle UDP-N-Acetylglucosamin-2-Epimerase/N-Acetylmannosamin-Kinase (GNE/MNK). Das Hauptziel dieser Dissertation war die Identifizierung neuer Inhibitoren der GNE-Subdomäne, die zur Hemmung der Sialinsäurebiosynthese in Zellen und zur Verringerung der Sialylierung der Zelloberfläche eingesetzt werden könnten. Zu diesem Zweck wurde GNE rekombinant exprimiert und eine Screening-Kampagne mit fast 70 000 Verbindungen gegen seine Aktivität durchgeführt. Die primären Treffer aus der Screening-Kampagne wurden anschließend in vitro und in cellulo charakterisiert. Die Inhibitoren haben nicht auf Zellen funktioniert, dafür haben sie in einem neu entwickelten NMR basierten Assay GNE Aktivität im Rattenleberzytosolextrakt inhibiert. / Sialic acids are part of the outermost component of the glycocalyx of all vertebrates. As such, they are fundamental markers in physiological and pathological processes. The "main regulator" of sialic acid biosynthesis is the bifunctional UDP-N-Acetylglucosamine-2-Epimerase/N-Acetylmannosamin Kinase (GNE/MNK). The main objective of this dissertation was the identification of new inhibitors of the GNE subdomain, which could be used to inhibit sialic acid biosynthesis in cells and reduce the sialylation of the cell surface. For this purpose, GNE was recombinantly expressed and a screening campaign against its activity was conducted with nearly 70,000 compounds. The primary hits from the screening campaign were subsequently characterized in vitro and in cellulo. The inhibitors did not work on cells, but they inhibited GNE activity in a rat liver cytosol extract in a newly developed NMR-based assay.

No description available.