Orientador: Elemir Macedo de Souza / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas / Made available in DSpace on 2018-08-18T22:06:21Z (GMT). No. of bitstreams: 1 Franca_AndreaFernandesEloydaCosta_D.pdf: 3442848 bytes, checksum: 1ed0dba42432e3b03b1b7c6c386bdf41 (MD5) Previous issue date: 2011 / Resumo: O lúpus eritematoso (LE) é uma doença auto-imune com espectro clínico variado. O lúpus eritematoso cutâneo (LEC) inclui o lúpus eritematoso agudo (LECA), o subagudo (LECSA) e o crônico (LECC). Lesões acrômicas podem ocorrer durante a evolução do LE, embora nunca tenham sido estudadas histologicamente. O objetivo deste trabalho é descrever os achados clínicos, laboratoriais e histológicos das lesões acrômicas no LE. Foram selecionados 12 pacientes com LE de um grupo de 220 atendidos no período de 2005 a 2008, sendo sete com LECC e cinco com LECSA. Doze pacientes com vitiligo e 10 controles de pele sã foram usados para comparação. As alterações histológicas encontradas foram: infiltrado inflamatório (75%); hiperceratose e espessamento da zona da membrana basal (ZMB) (66,7%); retificação da epiderme (58,3%); ceratinócitos apoptóticos epidérmicos, elastose e telangectasias (50%); fibrose (41,7%); degeneração vacuolar da ZMB (33,3%); rolhas córneas (16,7%). O diagnóstico histológico de LE foi possível em quatro casos. Melanina pela coloração de Fontana Masson (FM) foi vista em cinco casos e incontinência pigmentar em quatro. Melanócitos foram evidenciados em amostras de cinco doentes através da reação imunohistoquímica pelo HMB45 e Melan-A, com diferença estatística em relação aos controles. Quando comparado ao vitiligo, a diferença foi estatisticamente significante para os achados histológicos: ceratinócitos apoptóticos epidérmicos (p=0,014), espessamento da ZMB (p=0,009) e fibrose (p=0,037). Em relação à quantificação dos melanócitos, não houve diferença estatística entre o grupo LE e vitiligo usando os anticorpos Melan-A e HMB45. Concluímos que as lesões acrômicas no LE correspondem a lesões residuais, decorrentes de processo inflamatório liquenóide prévio que destrói os melanócitos. Não é possível diferenciar as lesões vitiligóides das duas dermatoses pela presença ou ausência de melanócitos, embora a repigmentação seja possível em ambas as doenças devido a presença de melanogênese ativa comprovada pela positividade pelo HMB45 / Abstract: Lupus Erythematosus (LE) is an autoimmune disorder with multiple clinical manifestations. Skin damage is a hallmark of the disease. Cutaneous LE (CLE) includes acute LE (ACLE), subacute LE (SCLE) and chronic LE (CCLE). Although achromic lesions are often found in patients with LEC, there are no detailed data about the histological features of such lesions. Therefore, we designed this study to determine clinical, laboratorial and histological profile of patients with LEC presenting achromic lesions. Between 2005 and 2008, we identified 12 individuals with LEC and acromic lesions from a larger group of 220 patients with LEC that were followed at the Dermatology outpatient clinic. There were seven patients with LECC and five with LECSA. Twelve patients with chronic stable vitiligo and 10 controls of unaffected skin were used for comparison. The most frequent histological abnormalities found in LEC-related achromic lesions were inflammatory infiltrates (75%); hyperkeratosis and thickening of the basement membrane (BM) (66.7%); epidermal flattening (58.3%); apoptotic epidermal keratinocytes, elastosis and vasodilation (50%); fibrosis (41.7%); hydropic degeneration of the basal cells (33.3%); follicular plugging (16.7%). These achromic lesions retained histological features that enabled the diagnosis of CLE to be established in four patients. Fontana Masson (FM) staining was positive for melanin in five cases and revealed pigmentary incontinence in four. Immunohistochemistry for HMB45 and Melan-A identified melanocytes in five CLE-related achromic lesions. Melanocyte counts were significantly smaller in achromic lesions when compared to unaffected skin samples. When compared to vitiligo, CLE-related achromic lesions showed more frequently apoptotic epidermal keratinocytes (p=0,014), thickening of the BM (p=0,009) and fibrosis (p=0,037). Melanocyte counts according to immunohistochemistry were similar in CLE and vitiligo groups. Our results indicate that CLE-related achromic lesions represent residual scars due to chronic lichenoid inflammation that leads to melanocyte destruction. Melanocyte count does not help to distinguish CLE-related achromic lesions and true vitiligo lesions. Despite this, HMB45 staining was sometimes positive in both conditions, which indicates active melanogenesis and suggests that repigmentation may be possible at least for some individuals / Doutorado / Clinica Medica / Doutor em Clínica Médica

Orientador: Simone Appenzeller / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas / Made available in DSpace on 2018-08-19T11:05:02Z (GMT). No. of bitstreams: 1 Aldar_Henrique_M.pdf: 1202072 bytes, checksum: f32d5c89beb6e8a3a6884266359ea535 (MD5) Previous issue date: 2011 / Resumo: O Lúpus Eritematoso Sistêmico Juvenil (LESJ) é uma doença inflamatória crônica, de etiologia desconhecida e natureza autoimune com início até os 16 anos de idade. O comprometimento do sistema nervoso central (SNC) é difícil de ser avaliado no LESJ. Os anticorpos anti-P ribossomal são autoanticorpos dirigidos contra epítopos de fosfoproteínas do complexo ribonucleoproteico ribossomal e com maior prevalência em pacientes com até 18 anos de idade. A proteína S100? tem baixo peso molecular, sendo composta de 91 aminoácidos e localizada principalmente nas células da neuroglia, células de Schwann e na maioria dos nervos sensoriais do tronco cerebral. Os objetivos deste trabalho foram determinar a associação entre anticorpos anti-P ribossomal e a proteína S100? com manifestações clínicas e laboratoriais no LESJ; avaliar a prevalência dos anticorpos anti-P ribossomal em pacientes com LESJ, familiares de primeiro grau e indivíduos controles saudáveis; e avaliar os níveis de proteína S100? em pacientes com LESJ e indivíduos controles saudáveis. Foram selecionados pacientes consecutivos com LESJ acompanhados na Reumatologia Pediátrica da Universidade Estadual de Campinas entre 2009/2010. Familiares aparentados em primeiro grau com os pacientes também foram incluídos. Os indivíduos do grupo controle foram pareados por idade, sexo e antecedentes demográficos. Manifestações clínicas, laboratoriais, atividade da doença [SLE Disease Activity Index (SLEDAI)], dano cumulativo [Lupus International Collaborating Clinics / American College of Rheumatology Damage Index (SDI)] e medicação em uso foram avaliados. Incluímos 50 pacientes com LESJ (média de idade de 16,82 ± 3,46 anos), 35 familiares (média de idade de 38,73 ± 3,89 anos), e 20 controles saudáveis (média de idade de 18,3 ± 4,97 anos). Observamos os anticorpos anti-P ribossomal em 13 (26%) dos pacientes com LESJ, e em nenhum familiar (p<0,01) ou controle (p<0,01). A presença dos anticorpos anti-P ribossomal esteve associada à presença de ansiedade no LESJ (p<0,002). Pacientes com distúrbio cognitivo (mediana=38,08) apresentaram níveis de S100? significativamente maiores quando comparados aos pacientes sem distúrbio cognitivo (mediana=16,12; p=0,01) e indivíduos controles (mediana=23,62; p<0,05). Nenhuma outra manifestação clínica, laboratorial, e de tratamento esteve associada com o anticorpo anti-P ribossomal ou com a proteína S100? no LESJ. A partir destes dados concluímos que os anticorpos anti-P ribossomal são frequentemente observados em pacientes com LESJ e estiveram associados com a presença de ansiedade neste grupo de pacientes; e que a presença de distúrbio cognitivo esteve associada com níveis elevados de S100?, indicando a presença de lesão neuronal nestes pacientes / Abstract: Childhood-onset systemic lupus erythematosus (cSLE) is a chronic inflammatory disease of unknown etiology and autoimmune nature, with disease onset until 16 years of age. It is difficult to assess the central nervous system involvement in cSLE. The antiribosomal P antibodies are autoantibodies directed against epitopes of ribosomal phosphoproteins from the ribonucleoprotein complex and more frequently observed in patients with up to 18 years old. The S100? protein has a low molecular weight, being composed of 91 amino acids and mainly located in the cells of the neuroglia, Schwann cells and sensory nerves in most of the brainstem. Our objectives were to determine the association between antiribosomal P antibodies and S100? protein with clinical and laboratory manifestations in cSLE; to assess the prevalence of antiribosomal P antibodies in patients with cSLE, first-degree relatives and healthy control subjects; and to evaluate S100? protein levels in cSLE patients and healthy control subjects. Consecutive cSLE patients followed in Pediatric Rheumatology at the University of Campinas between 2009/2010 were selected for this study. First-degree relatives were also included in this work. The control group was matched for age, gender and demographic background. Clinical, laboratory, disease activity [SLE Disease Activity Index (SLEDAI)], cumulative damage [Systemic Lupus International Collaborating Clinics /American College of Rheumatology Damage Index (SDI)] and medication in use were assessed. Fifty cSLE patients, (mean age of 16.82 ± 3.46 years), 35 relatives (mean age of 38.73 ± 3.89 years) and 20 healthy controls (mean age 18.3 ± 4.97 years) were selected. Thirteen (26%) cSLE patients presented the antiribosomal P antibodies, no first-degree relative (p<0.01) or control (p<0.01) presented antiribosomal P antibodies. Antiribosomal P antibodies were associated to anxiety in this cohort of cSLE patients (p<0.02). Patients with cognitive impairment (median = 38.08) had significantly higher levels of S100? compared to patients without cognitive impairment (median = 16.12, p = 0.001) and controls (median = 23.62, p <0.05 ).No other clinical, laboratory, and treatment were associated with the antiribosomal P antibodies or S100? protein in cSLE. These data shows that the antiribosomal P antibodies are often observed in cSLE patients and that it was associated with the presence of anxiety in this group of patients. The presence of cognitive impairment was associated with elevated levels of S100?, suggesting neuronal damage in these patients / Mestrado / Ciencias Basicas / Mestre em Clinica Medica

A method for assaying poly (ADP-ribose) polymerase (PADPRP) activity in lymphocytes of systemic lupus erythematosus (SLE) patients has been developed. Using this method, PADPRP activity has been studied in lymphocytes from 15 patients and 13 controls. The mean activity in SLE lymphocytes was significantly lower than that in controls and 60% of the SLE patients demonstrated activities below the minimum of the control population. Possible mechanisms for this altered metabolism were investigated. The Km app of PADPRP for NAD; size distribution, branch frequency, and rates of turnover of polymers; competition for substrate; and number of PADPRP molecules were studied. The data demonstrated that SLE lymphocytes have a decreased synthetic capacity rather than alterations in the substrate or in turnover of the product.

Bakgrund: Systemisk lupus erythematosus (SLE) är en kronisk autoimmun sjukdom som angriper friska celler, vävnader och organ. Varför patienter får SLE är ännu inte helt klarlagt. Det finns inget botemedel mot sjukdomen och den är svår att diagnostisera. Det finns endast medicin som används för att lindra symtom. Syfte: Syftet med litteraturstudien var att belysa patienters upplevelser av att leva med SLE. Metod: Litteraturstudien utgick från en induktiv ansats, kritisk granskning och genomgång av artiklar. Databaserna som användes var CINAHL, PubMed och PsycInfo. Resultat: Resultatet av studien mynnade ut i fyra olika kategorier: upplevelser av fysiska begränsningar, upplevelser av psykiska begränsningar, upplevelser av begränsningar och möjligheter i det sociala livet samt upplevelser av ekonomiska problem. Patienterna upplevde svårigheter vid fysisk aktivitet på grund av smärta. De upplevde psykiska problem som depression och ångest. Relationsproblem och ekonomiska problem uppkom även. Slutsats: Patienter med SLE är i behov av stöd som gör att de kan ta sig genom sin dag lättare då patienterna upplever att sjukdomen påverkar kroppen negativt. Mer utbildning behövs för sjuksköterskestudenter och personal för att lättare förstå patientens upplevelser och utforma omvårdnadsåtgärder därefter. / Background: Systemic lupus erythematosus is a chronic autoimmune disease which attacks healthy cells, tissues and organs. Why patients get SLE is not yet 100% clear. There's no cure for SLE and it's hard to diagnose. Only treatment for relief the symptoms are available. Aim: The aim of this study was to investigate patients´ experience of living with SLE. Method: The method used in this study was a structured literature review with an inductive approach and a clear view of audited articles. The databases used in this study were CINAHL, PubMed and PsycInfo. Result: The result of this study was divided into four groups: Experiences of physical limitations, experiences of psychic limitations, experiences of limitations and benefits in social life and experiences of economic limitations. The patients experienced difficulties with pain which affected all the physical activities. The patients experienced psychic problems. Depression and anxiety was a big problem. The patients also experienced relationship problems and economic problems. Conclusion: Patients with SLE is in need of support because they experience that the illness affects the body in a negative way. More education for nursing students and personnel is necessary to understand patient experiences of SLE and form care measures.

Introduction: SLE is associated with pro-atherogenic metabolic derangement and an elevated cardiovascular risk. The vascular endothelium may be a key interface between active SLE and premature atherosclerosis. Improved understanding of the contribution of inflammation and its management to cardiovascular risk in SLE will inform personalised treatment decisions in SLE patients. Methods: Data from an international inception cohort was used to investigate the relationship between inflammatory disease activity, lupus phenotype and corticosteroid exposure and the metabolic syndrome (MetS) over 2 years in SLE patients. The relationship between disease activity (BILAG-2004) and markers of endothelial function (flow-mediated dilatation (FMD) of the brachial artery) and endothelial damage (endothelial microparticles (EMPs)) following a change in anti-inflammatory therapy was investigated in a longitudinal cohort of patients with active SLE. Results: MetS was common in young SLE patients (12.6-16.0%) over the initial 2 years of disease. Factors independently associated with developing MetS over the 2-year study period were (odds ratio (95% CI)) Hispanic ethnicity (3.47 (1.76, 6.86)), higher initial peak corticosteroid dose (1.02 (1.01,1.03)), and elevated anti-dsDNA antibodies at study entry (1.86(1.19,2.81)). MetS was often persistent and preceding MetS strongly predicted future MetS (4.83 (2.93, 7.87)). Patients with active SLE had reduced FMD (median (IQR) FMD 1.63% (-1.22, 5.32) vs. 5.40% (3.02, 8.57); p = 0.05) and elevated EMPs (157,548/ml (59,906, 272,643) vs. 41,025 (30,179, 98,082); p = 0.003) compared to age-matched controls. Both improved following a change in anti-inflammatory therapy, and correlated moderately with change in disease activity over time. Conclusions: Inflammatory disease activity and higher doses of corticosteroids in very early disease influence the development of MetS in SLE, which can become persistent. Endothelial dysfunction is common in patients with active SLE but can be improved with better disease control. Therefore even from disease onset, therapeutic regimes should be individually tailored to achieve good disease control whilst minimising corticosteroid doses, to improve cardiovascular risk surrogates in SLE.

In this work the involved mechanisms between Ro/SSA complex, composed also by the tripartite motif 21 (TRIM21alpha) and trove domain 2 (TROVE2) proteins, with respect to systemic lupus erythematosus (SLE) autoantibodies is studied. The work is divided in three chapters: I- In vitro and in silico analysis of the molecular recognition between lupus autoantibodies and TRIM21alpha Fc Receptor ; II- In vitro evidence of bipolar-bridged immune TROVE2 complexes in the pathogenesis of systemic lupus erythematosus and III- Label-free piezoelectric biosensor for prognosis and diagnosis of Systemic Lupus Erythematosus. Samples of lupic patients and health subjects were kindly provided by La Fe hospital, accordingly the required protocols. After its extraction and purification, the immunoglobulin samples were obtained to study in vitro protein interactions and the involved mechanism by using a quartz crystal microbalance with dissipation factor attributions, and dual polarization interferometry. Techniques such, polarization modulation infrared interferometry, x-ray photoelectron interferometry and contact angle measurement were used in order to characterize surfaces. Pre-steady-state analysis revealed an antibody bipolar bridging involved in both TRIM21alpha and TROVE2 proteins. Identification of the main immunodominant human linear epitope for TRIM21alpha was finely mapped using a series of overlapping synthetic polypeptides with a size of 21 amino acids. The epitopes recognised by autoantibodies for this protein spanned the linear sequence from the aminoacid 151 to 183, and a conformational epitope for SLE patients and healthy subjects, respectively. Autoantibodies from lupic patients targeted protein epitopes, allowing health subjects to be discriminated. Major Histocompatibility Complex Class-II binding peptide prediction results corroborated the sequence as the immunodominant linear epitope, mostly coded as the HLA DRB1*1304 allele for SLE patients, and HLA DRB1*0806 for controls. The subdominant epitope corresponded to the PRY-SPRY domain, recently known as mammalian Fc receptor. Finally, the TRIM21alpha protein structure was modeled by a new homology modeling, never before presented. From the TROVE2 protein, the major linear epitope recognized by autoantibodies correspond to the sequence from the aminoacid 160 to 210 for healthy subjects. However, the major epitope in SLE serum is undiscovered. We suggest that the difference between epitopes could correspond to a majority necrosis-induced specificity in SLE patients, and an apoptotic via in healthy subjects. TROVE2 showed the ability to bind to Fcs, depending on alkaline earth cations in solution. The results suggest that the TROVE2-TRIM21alpha binding is a calcium-dependent protein interaction linked through the MIDAS-like motif in the vWFA-like domain. Finally, a pratical consequence of all study was the development of label-free biosensing method, based in microbalance technology, for in vitro diagnostics of systemic lupus erythematosus patients, allowing the premature sensing of autoantibodies against TRIM21alpha and TROVE2 protein, in advance of the clinical illness symptoms appear. / En este trabajo se ha estudiado el mecanismo involucrado entre el complejo Ro/SSA, compuesto también por las proteínas tripartite motif 21 alpha(TRIM21alpha;) y trove domain 2 (TROVE2) con respecto a autoanticuerpos de pacientes que tienen lupus eritematoso sistémico, en comparación con autoanticuerpos de personas sanas. El estudio comprende tres capítulos: I- Análisis in vitro e in silico del reconocimiento molecular entre autoanticuerpos de lupus y receptor TRIM21alpha; Fc; II- Evidencias in vitro de complejos inmunes TROVE2 bipolares con puentes en la patogénesis del lupus eritematoso sistémico y III- Biosensor piezoeléctrico libre de marcaje para el pronóstico y el diagnóstico del lupus eritematoso sistémico. Las muestras de pacientes lúpicos y personas sanas fueron proporcionadas por el hospital La Fe de acuerdo con los protocolos establecidos. Tras una etapa de extracción y purificación de las inmunoglobulinas fueron estudiadas la interacción de proteínas in vitro utilizando una microbalanza de cristal de cuarzo con atribución de factor de disipación e interferometria de polarización dual. Técnicas de caracterización como espectroscopía infrarroja de reflexión-absorción por modulación de la polarización, espectroscopía fotoelectrónica de rayos-x y análisis de ángulo de contacto fueron utilizadas con la finalidad de caracterizar superficies. El análisis del estado pre estacionario ha revelado un mecanismo de puente bipolar para las dos proteínas, TRIM21alpha; y TROVE2. Tras su identificación, el epítopo linear inmunodominante fue mapeado para TRIM21alpha;, utilizando una serie de polipéptidos sintéticos superpuestos de 21 aminoácidos. Los epitopos reconocidos por autoanticuerpos para esta proteína abarca la secuencia lineal a partir del aminoácido 151 hasta el 183 para epitopos de pacientes lúpicos y sujetos sanos, respectivamente. Autoanticuerpos de pacientes lúpicos reconocieron epítopos de proteínas, permitiendo la discriminación de pacientes sanos. Los resultados de la unión del Complejo Mayor de Histocompatibilidad clase II con el péptido de unión corroboraron la secuencia cómo el epítopo lineal inmunodominante, codificado como el alelo HLA DRB1 * 1304 para pacientes con LES y HLA DRB1 * 0806 para los controles. El epitopo subdominante corresponde al dominio PRY-SPRY, recientemente conocido receptor Fc de mamífero. Finalmente, la estructura de la proteína TRIM21alpha; fue determinada utilizando un nuevo modelo de homología no presentado antes. De la proteína TROVE2, el epitopo lineal immunodominante reconocido por los autoanticuerpos corresponde a la secuencia que pudiera corresponder del aminoácido 160 hasta 210 para sujetos sanos. Sin embargo, el epitopo mayoritario en sueros lúpicos no fue determinado. Se sugiere que la diferencia entre los epitopos se corresponde mayoritariamente a una necrosis-inducida en pacientes lúpicos, y a una vía apoptótica en pacientes sanos. TROVE2 presentó la habilidad de unirse a Fcs dependiendo de los cationes alcalinos presentes en la disolución. Los resultados sugieren que la unión TROVE2-TRIM21alpha; es dependiente de la interacción con calcio vinculada a través del motivo MIDAS en el dominio vWFA. Finalmente, una consecuencia práctica de todo el estudio fue el desarrollo de un biosensor libre de marcaje para diagnóstico in vitro de lupus eritematoso sistémico, permitiendo la detección prematura de autoanticuerpos anti TRIM21alpha; y anti TROVE2, varios años antes de la aparición de los síntomas clínicos de la enfermedad. / En aquest treball s'ha estudiat el mecanisme involucrat en el complex Ro/SSA, compost per les proteïnes tripartite motif 21 (TRIM21alpha;) i trove domain 2 (TROVE2) respecte a autoanticossos de pacients que tenen lupus eritematós sistèmic, en comparació amb autoanticossos de persones sanes. L'estudi es divideix en tres capítols: : I- Anàlisi in vitro i in silico del reconeixement molecular entre autoanticossos de lupus i receptor TRIM21alpha; Fc; II- Evidències in vitro de complexos immunes TROVE2 bipolars amb ponts en la patogènesi del lupus eritematós sistèmic i III-Biosensor piezoelèctric lliure de marcatge per al pronòstic i el diagnòstic del lupus eritematós sistèmic. Les mostres de pacients lúpics y persones sanes van ser amablement proporcionades per l'hospital La Fe d'acord amb els protocols establerts. Després d'una etapa de purificació adequada, el pool de mostres de immunoglobulines va ser estudiat les interaccions in vitro de les proteïnes utilitzant una microbalança de cristall de quars amb atribució de factor de dissipació i interferometria de polarització dual. Tècniques de caracterització, como ara espectroscòpia de infraroja de reflexió-absorció per modulació de la polarització, espectroscòpia fotoelèctrica de rajos X i anàlisi d'angle de contacte van ser emprades amb per tal de caracteritzar les superfícies. L¿anàlisi de l`estat preestacionari ha revelat un mecanisme de pont bipolar que involucra les dos proteïnes, TRIM21alpha; i TROVE2. Una vegada identificat, va ser mapat l'epítop immunodominant lineal per a TRIM21alpha; emprant una sèrie de polipèptids sintètics superposats de 21 aminoàcids. Els epítops reconeguts per autoanticossos per a aquesta proteïna engloben la seqüència lineal a partir de l'aminoàcid 151 fins al 183 per a epítops de pacients lúpics y subjectes sans, respectivament. Autoanticossos de pacients lúpicos van reconèixer epítops de proteïnes, fet que va permetre la discriminació de pacients sans. Els resultats de la unió del Complexe Major de Histocompatibilitat classe II amb el pèptid de unió van corroborar la seqüència com l'epítop lineal immunodominant, codificat com l'al·lel HLA DRB1 * 1304 per a pacients amb LES i HLA DRB1 * 0806 per als controls. L'epítop subdominant correspon al domini PRY-SPRY, recentment conegut receptor Fc de mamífer. Finalment, l'estructura de la proteïna TRIM21alpha; va ser determinada utilitzant un nou model d'homologia no presentat abans. De la proteïna TROVE2, l'epítop lineal immunodominant reconegut pels autoanticossos correspon a la seqüència que pogués correspondre l'aminoàcid 160 fins al 210 per a subjectes sans. No obstant això, l'epítop majoritari en sèrums lúpics no va ser determinat. Es suggereix que la diferència entre els epítops es correspon majoritàriament a una necrosis induïda en pacients lúpics i a una via apoptòtica en pacients sans. TROVE2 va mostrar l'habilitat de unir-se a Fcs en funció dels cations alcalins presents en la dissolució. Els resultats suggereixen que la unió TROVE2-TRIM21alpha; depèn de la interacció amb calci vinculada a través del motiu MIDAS en el domini vWFA. Finalment, la conseqüència pràctica de tot l'estudi va ser el desenvolupament d'un biosensor sense marcatge per al diagnòstic in vitro de lupus eritematós sistèmic, el qual permet la detecció prematura d'autoanticossos cap a les proteïnes TRIM21alpha; i TROVE2 anys abans de l'aparició dels símptomes clínics de la malaltia. / Do Nascimento, NM. (2017). The Ro/SSA Complex in Systemic Lupus Erythematosus Patients [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/80534 / TESIS

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Bakgrund: Systemisk lupus erythematosus (SLE) är en sjukdom som varierar i uttryck och allvarlighetsgrad och involverar hantering av många utmanande aspekter vilket kan leda till fysiska och psykologiska konsekvenser och begränsa förmågan att fungera fullt ut i det dagliga livet. Syfte: Syftet var att belysa personers upplevelser av att leva med systemisk lupus erythematosus i det dagliga livet. Metod: En litteraturöversikt med kvalitativ metod utfördes med induktiv ansats baserad på 13 vetenskapliga originalartiklar som analyserades enligt Graneheim och Lundmans innehållsanalys. Resultat: Personerna med SLE upplevde känslomässiga besvär som oro, depression och självmordstankar. De upplevde begränsningar i det dagliga livet, minskad självständighet och de lärde sig leva med sjukdomen på olika sätt. Relationer påverkades, det var en börda att förklara sjukdomen, de önskade förståelse, bekräftelse och att få stöd var betydelsefullt. Diskussion: Fynden i resultatet visar vikten av att använda en personcentrerad omvårdnad utifrån tidigare kunskap, erfarenheter och känsla av sammanhang (KASAM) vilket kan underlätta att hantera de negativa konsekvenserna av att leva med SLE, då personen blir bekräftad, förstådd och får omvårdnad efter behov, värderingar och önskemål. Slutsats: Litteraturöversikten bidrar till bättre förutsättningar i omvårdnaden då den tillför ökad kunskap och förståelse om upplevelsen av att leva med SLE. Det behövs ytterligare forskning i omvårdnad med fokus på fördjupad förståelse och kunskap om de varierande negativa konsekvenserna och vilka behov som sjukdomen SLE medför, och belysa vikten av att använda personcentrerad omvårdnad för att främja hälsa och lindra lidandet. / <p>Examinationsdatum: 2020-11-03</p>

Gain-of-function polymorphisms in the gene encoding human interferon regulatory factor-5 (IRF5) are associated with an increase in risk for the development of the autoimmune disease Systemic Lupus Erythematosus (SLE). IRF5 is a transcription factor that participates in the activation of the immune system through its role in both innate and adaptive immune cells. To determine the role of IRF5 in lupus pathogenesis in vivo, we evaluated the effect of Irf5-deficiency in the MRL/lpr mouse lupus model. We find that Irf5-deficient (Irf5-/-) MRL/lpr mice develop much less severe disease than their Irf5-sufficient (Irf5+/+) littermates, demonstrating an important role for IRF5 in disease pathogenesis in vivo. Patients with SLE are at increased risk for the development of atherosclerosis due in large part to poorly-defined lupus-specific risk factors. One such lupus-specific risk factor is thought to be chronic inflammation associated with the autoimmune process. As IRF5 is involved in pro-inflammatory responses we hypothesized that Irf5-deficiency would ameliorate atherosclerosis development in the context of autoimmunity. We therefore examined the role of IRF5 in the gld.apoE-/- mouse model of lupus and lupus-associated atherosclerosis. Irf5-deficiency led to a decrease in splenomegaly, lymphadenopathy, anti-nuclear autoantibody production and the severity of kidney disease. Surprisingly, despite the reduction in systemic autoimmunity, Irf5-deficiency led to a marked increase in the severity of atherosclerosis and to metabolic dysregulation characterized by hyperlipidemia, increased adiposity and insulin-resistance. Bone marrow chimera studies revealed that the pathogenic role of IRF5 in lupus was solely due to its expression in hematopoietic cells. The atheroprotective effect of Irf5 and the suppression of adiposity were found to be due to Irf5 expression in both hematopoietic and non-hematopoietic cells, whereas protection from hyperlipidemia was solely due to the expression of Irf5 in non-hematopoietic cells. Together, our results reveal a role for IRF5 in metabolic homeostasis, as well as in protection against atherosclerosis even in the setting of reduced lupus severity.

京都大学 / 0048 / 新制・課程博士 / 博士(医学) / 甲第19365号 / 医博第4042号 / 新制||医||1011(附属図書館) / 32379 / 新制||医||1011 / 京都大学大学院医学研究科医学専攻 / (主査)教授 椛島 健治, 教授 佐藤 俊哉, 教授 山田 泰広 / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM