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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.
41

L?QUEN PLANO BUCAL E A INFEC??O PELO V?RUS DA HEPATITE C

Barbosa, Hyrlana Leal 23 January 2007 (has links)
Made available in DSpace on 2015-07-15T13:31:41Z (GMT). No. of bitstreams: 1 Hyrlana Leal.pdf: 2114449 bytes, checksum: 1a7453f5f4cf5b54fa31a2de50b34c94 (MD5) Previous issue date: 2007-01-23 / Funda??o de Amparo a Pesquisa do Estado da Bahia / Lichen planus (LP) is a chronic inflammatory disease that affects skin and/or mucous and whose origin still is unknown. In the mouth the disease is called oral lichen planus (OLP). The association between OLP and the hepatitis C virus (HCV) infection has been widely argued in literature with controversial results. The aim of this age- and sex-matched case-control study was evaluate the association between OLP and HCV infection. Thirty individuals with OLP diagnosed in the Reference Center of Oral Disease of the State University of Feira de Santana, comprised of the test group (OLP group), and thirty healthy individuals proceeding from the same population were included in the control group. None out of the OLP group or control group were seropositive for anti-HCV. The results showed there is not association between OLP and HCV infection. Analyses add between the association of the LPB and the presence of systemic diseases, drugs use, menopause and habits to smoke and to consume alcoholic beverage did not shown significance statistics. On the basis of the results of the present study were not possible to establish the association between OLP and HCV infection. In conclusion, further new longitudinal studies may be performed in attempt to clarify this matter. / L?quen plano (LP) ? uma doen?a inflamat?ria cr?nica que afeta, principalmente, pele e/ou mucosas e cuja origem ainda ? desconhecida. Na boca a doen?a ? denominada de l?quen plano bucal (LPB). A associa??o entre o LPB e a infec??o pelo v?rus da hepatite C (VHC) tem sido amplamente discutida na literatura, com resultados controversos. Com o prop?sito de verificar a associa??o entre o LPB e a infec??o pelo VCH, foi conduzido um estudo tipo caso-controle, pareado por idade e selecionados trinta indiv?duos portadores de LPB, diagnosticados no Centro de Refer?ncia em Les?es Bucais da Universidade Estadual de Feira de Santana, que compuseram o grupo de casos, e outros trinta indiv?duos provenientes da mesma popula??o, que n?o apresentavam les?es bucais. Os resultados encontrados indicaram n?o haver associa??o entre o LPB e a infec??o pelo VHC visto que n?o foram encontrados indiv?duos com sorologia reagente para o v?rus. An?lises adicionais entre a associa??o do LPB e a presen?a de doen?as sist?micas e menopausa, uso de medicamentos e h?bitos de fumar e consumir bebidas alco?licas n?o mostraram signific?ncia estat?stica. Com base nos resultados do presente estudo n?o foi poss?vel estabelecer a associa??o entre o LPB e a VHC e, portanto, sugere-se a realiza??o de novos estudos longitudinais, que possam esclarecer tal poss?vel rela??o.
42

Estudo da expressão de genes relacionados à resposta inflamatória e autoimune em lesões de líquen plano oral do tipo reticular por meio de PCR-array / Study of the expression of inflammatory response-related genes and autoimmune in lesions of oral lichen planus reticular type by PCR-array

Anna Torrezani 26 September 2014 (has links)
O líquen plano oral (LPO) é uma doença inflamatória crônica que afeta em torno de 1 a 2% da população mundial adulta, entre 30 e 60 anos, principalmente mulheres. As lesões podem estar presentes em diversos sítios, porém tem predileção pela mucosa jugal, gengiva e bordas laterais da língua, todas bilateralmente. As manifestações de LPO são frequentes, e podem se caracterizar clinicamente em seis tipos: reticular, em placas, papular, atrófico, erosivo-ulcerativo e bolhoso, porém o mais comum é o reticular. O presente estudo teve como objetivo avaliar a expressão de genes relacionados à resposta inflamatória e autoimunidade no líquen plano oral (LPO) em pacientes com a variante exclusivamente reticular comparado a controle saudável. Foram incluídos consecutivamente 10 pacientes com LPO que preencheram os critérios de inclusão adotados, sendo 9 mulheres e um homem, e 6 indivíduos controle, sendo 4 mulheres e 2 homens pareados por sexo, idade e uso de medicações sistêmicas. Amostras de mucosa bucal foram coletadas por meio de biópsia incisional em ambos os grupos de pacientes e submetidas à extração de RNA para posterior análise da expressão gênica por PCR-array selecionada para este estudo. Os resultados obtidos foram o aumento da expressão de 8 genes, CXCL 9 e CXCL 10 vão de acordo com a literatura, corroborando com nosso estudo e de certa forma reafirmar mais necessidade de estudos bem desenhados . / The oral lichen planus (OLP) is a chronic inflammatory disease that affects around 1-2% of the adult population between 30 and 60 years, mainly women. The lesions may be present in several sites, but has a predilection for the buccal mucosa, gums and lateral borders of the tongue, all bilaterally. The manifestations of OLP are frequent, and may be characterized clinically in six types: reticular, plaque-like, papular, atrophic, erosive-ulcerative and bullous, but the most common is the reticular . The present study aimed to evaluate the expression of genes related to inflammatory response and autoimmunity in oral lichen planus (OLP) in patients with exclusively reticular variant compared to healthy control. 10 consecutive patients with OLP who met the inclusion criteria, 9 women and one man, and six control subjects were included were 4 women and 2 being proportionally matched by sex, age and use of systemic medications men. Samples of oral mucosa were collected by incisional biopsy in both groups of patients and subjected to RNA extraction for analysis of gene expression by selected for this study-PCR array. The results were the overexpression of genes 8, where only two of them go according to the literature, corroborating our study and somehow reaffirm need for more well-designed studies.
43

População de células T CD8+ e Foxp3+ no líquen plano oral associado à infecção crônica de hepatite C / Subset of CD8(+) and Foxp3(+) T Cells in Oral Lichen Planus Associated with Chronic Hepatitis C virus Infection

Alessandra Rodrigues de Camargo 11 March 2013 (has links)
A experiência adquirida na realização de estudos epidemiológicos sobre o líquen plano oral associado à infecção crônica de hepatite C nos faz acreditar que as lesões atróficas/erosivas associadas ao vírus C tendem a apresentar características clínicas atípicas, por vezes exacerbadas e com resposta piorada à terapêutica proposta. Acreditando que existiria uma contrapartida histopatológica que justificasse o comportamento clinico evidenciado, o presente estudo propôs-se a estudar as populações de células T CD8+ e Foxp3+ no líquen plano oral associado à infecção crônica de hepatite C e compará-las com as populações do líquen plano oral idiopático. Foram selecionados 11 blocos de líquen plano oral associado à infecção crônica de hepatite C (Grupo 1) e 19 blocos parafinados de líquen plano oral idiopático (Grupo 2) dos arquivos do Laboratório de Patologia Cirúrgica da Disciplina de Patologia Bucal da Faculdade de Odontologia da Universidade de São Paulo e do Laboratório de Patologia Bucal, do Departamento de Patologia, da Universidade Federal de Santa Catarina. Para ambos os grupos foram realizados ensaios imunohistoquímicos com marcação dos anticorpos anti-CD8 e anti-Foxp3. As células marcadas foram contabilizadas e os resultados tratados estatisticamente. No Grupo 1, 64% dos pacientes eram do sexo feminino; 82% leucodermas e a média de idade era de 59 anos (variação 46 aos 75 anos). No Grupo 2, 63% dos pacientes eram do sexo feminino; 71% leucodermas e a média de idade era de 50,2 anos (variação 32 aos 66 anos). Quando os dados entre os Grupos 1 e 2 foram comparados, não houve correlação estatisticamente significante entre as contagens de células T CD8+, contagens de células T Foxp3+ ou na relação CD8+/Foxp3+ por mm2. As lesões atróficas/erosivas do Grupo 1 apresentaram densidade aumentada de células T CD8+ (p=0,034) e aumento na relação CD8+/Foxp3+ por mm2 (p=0,018), em relação ao Grupo 2. O estudo realizado não encontrou diferenças nas densidades de células T CD8+ e Foxp3+ no infiltrado do líquen plano oral associado ao vírus C em relação ao líquen plano idiopático. Por outro lado, as diferenças encontradas na quantidade de células T CD8+ e na relação CD8/Foxp3, em lesões atróficas/erosivas, parecem justificar as características clínicas evidenciadas em estudos prévios. / Our previous studies with oral lichen planus associated with chronic hepatitis C virus infection leads us to believe that atrophic/erosive forms of oral lesions tend to present unusual clinical features, sometimes exacerbated with a worsened response to treatment. Considering that this exacerbated aspect could indicate a similar exacerbate histopathological feature, the aim of this study was evaluated the populations of CD8(+) and Foxp3(+) T cells in oral lichen planus associated with chronic hepatitis C virus infection and correlated the findings with idiopathic forms of these lesions. The sample consisted of 11 cases of oral lichen planus associated with chronic hepatitis C virus infection (Group 1) and 19 cases of idiopathic oral lichen planus (Group 2) obtained from the Laboratories of Oral Pathology of the University of São Paulo and the Federal University of Santa Catarina. In both groups immunohistochemistry staining were performed using anti-CD8 and anti-Foxp3 antibodies. Positive cells were counted per area and the results were subjected to statistical analysis. In Group 1, 64% of the patients were female, 82% caucasian with mean age of 59 years (range from 46 to 75 years). In Group 2, 63% of the patients were female, 71% caucasian with mean age 50.2 years (range from 32 to 66 years). When Groups 1 and 2 were compared, no significant correlation between the frequencies of CD8(+), Foxp3(+) T cells and the ratio of CD8(+)/Foxp3(+) counts per mm2 was found. The atrophic/erosive lesions in Group 1 showed an increased frequency of CD8(+) T cells (p = 0.034) and an increased ratio of CD8(+)/Foxp3(+) counts per mm2 (p = 0.018) compared to Group 2. In conclusion, our data indicated no differences in the frequencies of CD8(+) and Foxp3(+) T cells in the inflammatory infiltrate of oral lichen planus associated with chronic hepatitis C virus infection compared to idiopathic lesions. However, the differences in the counts of CD8(+) T cells and the ratio of CD8(+)/Foxp3(+) in atrophic/erosive lesions seemed justify the clinical features in previous studies.
44

Estudo da expressão de genes relacionados à resposta inflamatória e autoimune em lesões de líquen plano oral do tipo reticular por meio de PCR-array / Study of the expression of inflammatory response-related genes and autoimmune in lesions of oral lichen planus reticular type by PCR-array

Torrezani, Anna 26 September 2014 (has links)
O líquen plano oral (LPO) é uma doença inflamatória crônica que afeta em torno de 1 a 2% da população mundial adulta, entre 30 e 60 anos, principalmente mulheres. As lesões podem estar presentes em diversos sítios, porém tem predileção pela mucosa jugal, gengiva e bordas laterais da língua, todas bilateralmente. As manifestações de LPO são frequentes, e podem se caracterizar clinicamente em seis tipos: reticular, em placas, papular, atrófico, erosivo-ulcerativo e bolhoso, porém o mais comum é o reticular. O presente estudo teve como objetivo avaliar a expressão de genes relacionados à resposta inflamatória e autoimunidade no líquen plano oral (LPO) em pacientes com a variante exclusivamente reticular comparado a controle saudável. Foram incluídos consecutivamente 10 pacientes com LPO que preencheram os critérios de inclusão adotados, sendo 9 mulheres e um homem, e 6 indivíduos controle, sendo 4 mulheres e 2 homens pareados por sexo, idade e uso de medicações sistêmicas. Amostras de mucosa bucal foram coletadas por meio de biópsia incisional em ambos os grupos de pacientes e submetidas à extração de RNA para posterior análise da expressão gênica por PCR-array selecionada para este estudo. Os resultados obtidos foram o aumento da expressão de 8 genes, CXCL 9 e CXCL 10 vão de acordo com a literatura, corroborando com nosso estudo e de certa forma reafirmar mais necessidade de estudos bem desenhados . / The oral lichen planus (OLP) is a chronic inflammatory disease that affects around 1-2% of the adult population between 30 and 60 years, mainly women. The lesions may be present in several sites, but has a predilection for the buccal mucosa, gums and lateral borders of the tongue, all bilaterally. The manifestations of OLP are frequent, and may be characterized clinically in six types: reticular, plaque-like, papular, atrophic, erosive-ulcerative and bullous, but the most common is the reticular . The present study aimed to evaluate the expression of genes related to inflammatory response and autoimmunity in oral lichen planus (OLP) in patients with exclusively reticular variant compared to healthy control. 10 consecutive patients with OLP who met the inclusion criteria, 9 women and one man, and six control subjects were included were 4 women and 2 being proportionally matched by sex, age and use of systemic medications men. Samples of oral mucosa were collected by incisional biopsy in both groups of patients and subjected to RNA extraction for analysis of gene expression by selected for this study-PCR array. The results were the overexpression of genes 8, where only two of them go according to the literature, corroborating our study and somehow reaffirm need for more well-designed studies.
45

Human Papilloma Virus, Epstein-Barr Virus, and Herpes Simplex Virus Type-1 in Oral Squamous Cell Carcinomas from Three Populations

Jalouli, Jamshid January 2010 (has links)
Most oral squamous cell carcinoma (OSCC) is believed to develop via a multistep process of cumulative gene damage in epithelial cells. Increasing incidence of OSCC and evidence that traditional risk factors may not be responsible directed us to investigate the prevalence of virus in pre- and malignant samples.The integration of the DNA from human papillomavirus (HPV), Epstein-Barr virus (EBV), and Herpes simplex (HSV) into the human genome is associated with the expression of oncogenes and the down-regulation of tumor-suppressor genes in OSCC carcinogenesis. This thesis compared samples from India and Sudan, two countries on two continents having a documented high incidence of oral cancer, with specimens from Sweden, with its known low incidence of oral cancer. Each region has, in addition to smoking, a unique non-smoked tobacco habits with documented carcinogenic effects. These countries also typify areas of low and high socioeconomic living conditions with their expected impact on disease development. The study populations were selected from tobacco users and nonusers with OSCC, oral sub-mucous fibrosis (India), oral lichen planus (Sweden), oral leukoplakia with and without dysplasia and snuff-induced lesions (Sweden and Sudan). An expedient method was developed for extracting DNA from old formalin-fixed and paraffin-embedded biopsies. The prevalence of HPV, EBV, and HSV was investigated using PCR/DNA sequencing and southern blot hybridization analysis. We found HPV and EBV to be most prevalent in samples of tissue characterized as normal, with decreasing prevalence in dysplastic and malignant lesions. This intriguing finding that prevalence decreases as neoplastic development proceeds warrants further investigation. Our data do not at first sight support the conclusion that viruses and tobacco use jointly interact with cell mechanisms in the development of oral cancer.
46

Estudo imuno-histoquímico da expressão de metalotioneína e proteína p16 em líquen plano e reações liquenóides orais

Mendes, Gabriela Geraldo 30 April 2015 (has links)
Fundação de Amparo a Pesquisa do Estado de Minas Gerais / Lichen planus is a chronic inflammatory disease mediated by T cells of unknown cause. Skin, nails and mucous membranes can be affected, and the disease is more common in middleaged adults, especially in women. Oral lichen planus (OLP) manifests as reticular (white) and erosive (red) lesions that are eventually painful. Histologically, it is characterized by dense lymphocytic infiltrate beneath the epithelium, apoptosis of keratinocytes, liquefaction of the basal layer, epithelial hyperplasia and hyperkeratosis. Oral lichenoid reactions (OLR) are distinguished from OLP by the presence of precipitating factors, unilateral lesions and diffuse inflammatory infiltrate. Metallothionein is a protein involved in anti-oxidative response and anti-apoptotic pathways. Ki-67 is a cellular proliferation marker and is expressed only in cells that are in cell division (phases G1, S, G2 and M of the cell cycle). The tumor suppressor gene p16 is involved in the pRb pathway and participates in the regulation of the cell cycle, repairing possible damage to DNA. The aim of this study was to evaluate possible molecular differences, related to oxidative stress and cell proliferation between OLP and OLR, and the two major forms of OLP in order to better understand the pathogenesis of these lesions and facilitate the differential diagnosis between them. Immunohistochemistry for metallothionein, Ki-67 and p16 detection was performed in 42 and 23 cases of OLP and OLR, respectively. Reactivity for metallothionein was more frequently observed in OLP cases than in OLR cases (p = 0,01; Mann-Whitney U test). Significant difference was found between the reticular and atrophic lesions of OLP for p16 protein (p = 0,04; Mann-Whitney U test). There was no significant difference between the lesions in relation to Ki-67 antigen. The results of this study suggest that metallothionein protein may be a useful marker of differential diagnosis between OLP and OLR, and that p16 protein may be a differential marker of reticular and atrophic/erosive lesions of OLP. / O líquen plano é uma doença inflamatória crônica, mediada por células T e de causa desconhecida. Pele, unhas e mucosas podem ser afetadas, e a doença é mais comum em adultos de meia-idade, especialmente em mulheres. Histologicamente, é caracterizada por denso infiltrado linfocitário subepitelial em banda, apoptose de queratinócitos, liquefação da camada basal, hiperplasia e hiperqueratose epitelial. O líquen plano oral (LPO) se manifesta clinicamente como lesões reticulares (brancas) e atróficas/erosivas (vermelhas), que são eventualmente dolorosas. Reações liquenóides orais (RLO) distinguem-se do LPO pela presença de fatores precipitantes, lesões unilaterais e infiltrado inflamatório difuso. A metalotioneína é uma proteína envolvida em resposta antioxidante e vias anti-apoptóticas. Ki- 67 é um marcador de proliferação celular e é expresso somente em células que estão em divisão celular (fases G1, S, G2 e M do ciclo celular). O gene supressor de tumor p16 está envolvido na via de sinalização pRb e atua na regulação do ciclo celular, reparando possíveis danos ao DNA. O objetivo deste estudo foi avaliar possíveis diferenças moleculares, relacionadas ao estresse oxidativo e proliferação celular entre LPO e RLO, bem como as duas formas clínicas principais de LPO, a fim de melhor compreender a patogênese dessas lesões e facilitar o diagnóstico diferencial entre elas. Imuno-histoquímica para detecção de metalotioneína, Ki-67 e p16 foi realizada em 42 e 23 casos de LPO e RLO, respectivamente. Reatividade para metalotioneína foi mais frequente em casos de LPO do que em casos de RLO (p = 0,01; Mann-Whitney U). Foram observadas diferenças significativas entre as lesões reticulares e atróficas/erosivas de LPO para a proteína p16 (p = 0,04; Mann-Whitney U). Não houve diferença significativa entre as lesões em relação ao antígeno Ki-67. Os resultados deste estudo sugerem que a proteína metalotioneína pode ser um marcador útil do diagnóstico diferencial entre LPO e RLO, e que a proteína p16 pode ser um marcador diferencial das lesões reticulares e atróficas/erosivas de LPO. / Mestre em Biologia Celular e Estrutural Aplicadas
47

Prevalência de Candida spp e xerostomia em pacientes com líquen plano oral. Um estudo grupo-controle / Prevalence of Candida spp e xerostomia in patients with oral lichen planus. A controlled study

Gabriela Artico 17 February 2011 (has links)
Enquanto lesões cutâneas do líquen plano (LP) são autolimitantes, suas manifestações orais (LPO) têm comportamento crônico, raramente apresentam remissão espontânea, e podem sofrer transformação maligna, embora subsista controvérsia sobre esta ultima questão. A este respeito, alguns autores têm dado ênfase ao envolvimento da Candida spp. na malignização LPO devido à capacidade deste fungo em produzir enzima carcinogênica N-nitrobenzilmetilamina e sua relativa freqüência em lesões LPO. Adicionalmente, foi investigada a xerostomia que, além de ocorrer com maior freqüência em indivíduos da faixa etária em que o LPO é mais prevalente, é considerado fator predisponente à candidose. Portanto, a correlação entre xerostomia e colonização por Candida spp. apresente relevância de ser investigada. O presente estudo objetivou comparar a prevalência de Candida spp. e xerostomia em 37 pacientes com lesões LPO (grupo LPO) com a de 26 pacientes com lesões inflamatórias não-LPO (grupo não-LPO) e com a de 28 indivíduos sem lesões orais (grupo controle-saudável). Pacientes LPO foram predominantemente indivíduos do sexo feminino com média idade de 50 anos. Presença de xerostomia foi evidenciada em 35,1% dos pacientes do grupo LPO, em 38,5% do grupo não-LPO e em 25% do grupo controle-saudável, não havendo diferença estatisticamente significante entre os três grupos (p > 0,05). Nos três grupos, medicação sistêmica e presença de distúrbios emocionais (ansiedade e depressão) não foram estatisticamente significante associados como fatores ao desenvolvimento de xerostomia (p > 0,05). A presença de xerostomia não foi fator estatisticamente significante de predisposição à colonização por Candida spp. nos três grupos. Colonização por Candida spp foi maior no grupo controle-saudável (53,5%) que nos outros grupos (29,7% no LPO e 26,9% no não-LPO), porém, não houve diferença estatisticamente significante (p > 0,05). Formas clínicas do LPO não foram fatores de predisposição à colonização por Candida spp. Espécie mais freqüentemente isolada nos três grupos foi Candida albicans. Formas não-albicans, especificamente a C. dubliniensis, foram encontradas em três indivíduos do grupo controle-saudável. / While cutaneous lesions of lichen planus (LP) are self-limiting, its counterpart oral manifestations (OLP) are chronic, hardly ever undergo spontaneous remission, and may suffer malignant transformation, though this latter issue still bears some controversy. In this respect, some authors have believed that Candida spp. might play a part in the OLP process of malignant transformation since this fungi has the ability to produce carcinogenic N-nitrobenzilmetilamina enzyme and has been found in OLP lesions. Apart that, xerostomia is considered a predisposing factor to candidosis and occurs more frequently in individuals at an aging in which OLP is more prevalent. Therefore, the correlation between xerostomia and candidosis may be worth it investigating. This study aimed at comparing the prevalence of Candida spp. and xerostomia in 37 patients with OLP lesions (OLP group) with that of 26 patients with inflammatory non-OLP disease (non-OLP group) and with that of 28 subjects without oral mucosal lesions (healthy-control group). OLP patients occurred predominantly in females at a mean age of 50 years. Presence of xerostomia was seen in 35.1% of patients in the OLP group, in 38.5% of the non-OLP and in 25% of the healthy-control group with no statistically significant difference among the three groups (p > 0.05). In all the groups, systemic medication and the presence of psychological disorder (anxiety and depression) were not statistically significant factors associated with the development of xerostomia. The presence of xerostomia was not a statistically significant factor at predisposing the colonization by Candida spp. in the three groups (p > 0.05). Colonization by Candida species was higher in healthy-control group (53.5%) than in other groups (29.7% in OLP and 26.9% in non- LPO), but the difference among them did not reach a statistical significance (p > 0. 05). Clinical forms of OLP were not predisposing factors to the colonization by Candida spp. The most frequently isolated species in the three groups were Candida albicans. Non-albicans forms, specifically C. dubliniensis, was found in three patients in the healthy-control group.
48

Uso de tacrolimus tópico em pacientes com gengivite descamativa: um estudo aberto / An open trial study of occlusive topical use of tacrolimus in 0.1% in patients with desquamative gingivitis

Anna Torrezani 08 July 2011 (has links)
O presente estudo teve como objetivo avaliar a eficácia do imunossupressor tópico tacrolimus a 0,1%, aplicado de forma oclusiva com o auxílio de moldeiras individualizadas de silicone em pacientes com gengivite descamativa decorrentes do líquen plano oral (LPO) e do penfigóide das membranas mucosas (PMM). Foram selecionados consecutivamente 18 pacientes que preencheram os critérios de inclusão adotados, sendo 17 mulheres (8 LPO / 9 PMM) e 1 homem com LPO. Após o estabelecimento do diagnóstico os pacientes foram avaliados por um mesmo avaliador quanto aos sinais e sintomas, utilizando-se para isso duas escalas visuais analógicas, uma para dor e outra para ardência, além de um periograma especialmente desenhado para avaliação clínica, demarcando as áreas onde haviam a presença de lesões gengivais no dia zero e no dia 90. Após adequação periodontal os pacientes eram moldados para confecção de uma moldeira individual de silicone para servir de suporte oclusivo para a medicação estudada. A terapêutica adotada foi dividida em duas fases de 45 dias totalizando 90 dias. Na primeira fase os pacientes foram orientados a usar de 1 a 2 gramas da medicação em cada moldeira, duas vezes ao dia por 20 minutos e na segunda fase somente uma vez ao dia. Os possíveis efeitos colaterais eram monitorados durante as consultas de retorno a cada 15 dias. Ao final dos 90 dias avaliamos o percentual de remissão dos sinais, classificada como completa (100%), excelente (75% a 99%), boa (50% a 74%), regular (1 a 44%), inalterada ou com piora do quadro. Nos pacientes estudados obtivemos remissão completa em 4 (30,76%), 4 com remissão excelente (30,76%), 4 com remissão boa (30,76%) e um com remissão regular (7,69%). Em relação aos sintomas da dor obtivemos uma redução média de 60% e em relação a ardência uma redução média de 65,5%. Os pacientes com LPO obtiveram uma redução média da dor de 42,5% e da ardência de 58%, nos pacientes com PMM a redução da dor foi de 92,8% e da ardência de 80,7%. A comparação dos escores de dor antes e após o tratamento apresentou valor de p<0,01 quando realizado o teste de Wilcoxon para amostras pareadas. O mesmo resultado (p<0,01) foi encontrado quando comparados os escores de ardência. Os valores obtidos demonstraram que a diminuição dos escores de dor e ardência foi estatisticamente significante. Como efeitos colaterais observamos que todos relataram alteração transitória de paladar e um paciente com LPO desenvolveu candidose. Concluímos que o tacrolimus a 0,1% aplicado topicamente com moldeiras individuais de silicone foi eficaz no tratamento das gengivites descamativas quanto a dor, ardência e remissão clínica das lesões gengivais em pacientes com LPO e PMM. / The objective of this study was to evaluate the efficacy of application of the topical immunosuppressor 0.1 % tacrolimus in patients with desquamative gingivitis (DG) associated with oral lichen planus (OLP) and mucous membrane pemphigoid (MMP). We selected 18 patients that fulfilled the inclusion criteria: 17 females (8 OLP/ 9MMP) and one male (OLP). After diagnosis, all subjects were evaluated by the same researcher, who assessed pain and burning using two visual analogical scales, one for pain and the other for burning, in conjunction with a diagram of the gingival mucosa. Measurements were made on day zero and day 90. After the periodontal assessment, individualized silicone rubber trays were prepared in order to deliver the drug. The therapeutic strategy was divided in two phases of 45 days for a total of 90 days. In the first treatment phase it was recommended that all patients use one or two grams of 0.1 % tacrolimus in his/her tray for twenty minutes, twice daily; in the second phase, the treatment was to be used only once daily. All side effects were monitored during biweekly return visits. At the end of 90 days, the response to therapy was assessed according to the following scale, as a percentage of remission: complete (100 %), excellent (75 % to 99 %), good (50 % to 74 %), poor (1 % to 49 %), no response (0 %) and worsened. We observed complete remission in 4 patients (30.76 % of the experimental group), excellent in 4 patients (30.76 %), good in 4 patients (30.76 %), and poor in one (7.69%). Pain was reported to be reduced by 60 % while burning was reduced by 65.5 %. OLP patients showed an average reduction by 42.5% of pain and 58% of burning. MMP patients showed an average reduction by 92.8% of pain and 80.7% of burning. After treatment, the data were analyzed by Wilcoxons test; significant differences (p < 0.01) were found for both pain and burning. Side effects included transitory alteration of taste, and one patient was diagnosed with candidiasis. From this study, we conclude that topical application of 0.1% tacrolimus using silicone rubber trays is an effective treatment for desquamative gingivitis, decreasing pain, burning and clinical lesions in OLP and MMP patients.
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Tratamento do líquen plano oral recalcitrante com tacrolimo 0,1 %

Resende, João Paulo Marinho de 18 February 2009 (has links)
Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-10-05T14:19:45Z No. of bitstreams: 1 joaopaulomarinhoderezende.pdf: 4196573 bytes, checksum: ebdd159522bdab6897215b5587c36b68 (MD5) / Approved for entry into archive by Diamantino Mayra (mayra.diamantino@ufjf.edu.br) on 2016-10-06T12:29:39Z (GMT) No. of bitstreams: 1 joaopaulomarinhoderezende.pdf: 4196573 bytes, checksum: ebdd159522bdab6897215b5587c36b68 (MD5) / Made available in DSpace on 2016-10-06T12:29:39Z (GMT). No. of bitstreams: 1 joaopaulomarinhoderezende.pdf: 4196573 bytes, checksum: ebdd159522bdab6897215b5587c36b68 (MD5) Previous issue date: 2009-02-18 / O Líquen Plano Oral (LPO) é considerado uma doença inflamatória auto imune de curso crônico e sua presença pode estar relacionada com o aumento do estresse emocional. A sua relevância clínica está na possibilidade, ainda controversa, de se transformar em um carcinoma de células escamosas e de sua etiologia ainda obscura e desconhecida. Esse trabalho se propôs a tratar lesões de LPO que foram recalcitrantes aos tratamentos convencionais com corticosteróides, utilizando-se o Tacrolimo 0,1% (Protopic®) de uso tópico, aplicado duas vezes ao dia, por um período de oito semanas. Foram selecionados quinze pacientes (n = 15), que preencheram uma ficha de anamnese e uma escala visual de dor antes e depois do tratamento. Todos os pacientes se submeteram a uma biópsia inicial para o diagnóstico da doença e outra final para avaliar a ação da medicação sobre o infiltrado inflamatório. Foi realizado controle semanal, observando-se os aspectos clínicos, a sintomatologia dolorosa e a ocorrência de efeitos colaterais que quando presentes foram leves e transitórios. A análise dos resultados mostrou doze pacientes (80%) com remissão completa ou quase que completa das lesões e da sintomatologia dolorosa, dois pacientes (13,33%) apresentaram as lesões mais claras e apenas um paciente (6,67%) não obteve nenhuma alteração clínica e da sintomatologia dolorosa. Quanto à análise da regressão das características histológicas do LPO, notamos uma regressão moderada ou acentuada em doze pacientes (80%) e ausente ou leve em três pacientes (20%). Esses resultados nos fazem concluir que o Tacrolimo 0,1% (Protopic®) é uma medicação eficaz e segura, que melhora o aspecto clínico da lesão, diminui a sintomatologia dolorosa e reduz as características histopatológicas do LPO. / The oral lichen planus (OLP) has been considered a chronic-course auto immune inflammatory disease and its presence may be related to increased emotional stress. The clinical relevance of OLP is the possibility, in developing a squamous cell carcinoma which its etiology is still obscure and unknown. The aim of the present study is to treat OLP lesions that were recalcitrant to conventional treatment with corticosteroids, using topical Tacrolimus 0.1% (Protopic®), applied twice a day, for a period of eight weeks. Fifteen patients were selected who had filled out a history form and a visual scale for pain before and after treatment. All patients were submitted to an initial biopsy for the diagnosis of the disease and another one at the end to evaluate the effect of medication on the infiltrate. A weekly control was carried out, observing the clinical aspects, painful symptoms and the occurrence of side effects which, where present, were mild and transient. The results showed twelve patients (80%) with total or nearly total remission of painful symptoms and lesions, two patients (13.33%) showed the clearer lesions and only one patient (6.67%) did not obtain any change in clinical symptoms and pain. Throught the analysis of the histopathological features regression of OLP, if could be noticed a moderate or accented regression in twelve patients (80%) and an absent or mild regression in three patients (20%). Based on the our results, it was possible to conclude that the Tacrolimus 0.1% (Protopic®)is a safe and effective medication that improves the clinical aspect of the injury, reduces the painful symptoms and reduces the histopathological features of the OLP.
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Inflammations orales et infection par le virus d’Epstein-Barr : vers un nouveau paradigme en pathogenèse orale / Oral inflammation and Epstein-Barr virus infections : towards a new paradigm in oral pathogenesis

Olivieri, Charles-Vivien 06 December 2018 (has links)
La cavité buccale constitue une porte d’entrée et un site réservoir majeur pour une diversité de virus. Mis à part l’herpèsvirus simplex, peu d’études virologiques détaillent le rôle des virus pathogènes de la sphère orale dont le virus d’Epstein-Barr. Le consensus est que les inflammations orales surviennent principalement en réaction à des infections bactériennes et fongiques provoquant une dysbiose du biofilm oral. Toutefois, ce modèle n’est pas parfait et il explique mal les récidives observées après décontamination, le découplage entre dysbiose et poussées inflammatoires, la proximité de dents atteintes et saines dans un environnement bactérien similaire. L’hypothèse d'un mécanisme synergique combinant virus et bactéries a été proposée pour la parodontite. Selon ce modèle, l’action complémentaire des 2 types d’agents infectieux sur le microenvironnement immunitaire favoriserait la chronicité inflammatoire et l’évolution de la maladie. Nos travaux se concentrent sur l’étude de l’infection de la cavité orale par EBV. EBV est un virus ubiquitaire infectant l’homme de manière persistante. La cavité orale est le site privilégié pour sa réplication avec une production salivaire quasi-constante. Outre un rôle transformant majeur, l’implication de EBV est aussi suspectée pour plusieurs maladies inflammatoires. Tout d’abord, nous nous sommes intéressés au lichen plan oral (LPO), une maladie auto-immune dont l'étiopathogénie n’est pas clairement établie. Sur des biopsies de patients atteints de LPO (n=99), nous avons démontré par hybridation in situ que le LPO est fréquemment infecté par EBV (74%), notamment les formes cliniques érosives. Nous montrons que le degré d’infiltration des lésions par des cellules infectées par EBV (EBV+) est corrélé avec les paramètres inflammatoires et que les cellules EBV+ infiltrées sont des plasmocytes. Cela apporte un élément nouveau dans la mesure où les plasmocytes sont reconnus comme des cellules immunitaires régulatrices majeures. Nous décrivons des profils cytokiniques différents entre LPO infectés ou non, sans qu’il soit possible à ce stade de pouvoir impliquer directement les plasmocytes. Nous confirmons par microscopie électronique que les plasmocytes hébergent les stades tardifs du cycle d’EBV et produisent des virions dans le LPO, suggérant un mécanisme d’amplification locale de l'infection. Ensuite, nous nous sommes intéressés à la parodontite, maladie inflammatoire chronique commune qui détruit la structure parodontale et provoque le déchaussement dentaire. Cette maladie est clairement identifiée comme facteur aggravant de nombreuses maladies systémiques. Nos études avaient déjà mis en évidence un lien direct entre infection EBV et la sévérité de la parodontite. Mes travaux ont permis de montrer que le parodonte inflammatoire est infiltré par des cellules EBV+ qui semblent être majoritairement des plasmocytes. La présence de plasmocytes producteurs de virus au sein de la lésion inflammatoire pourrait expliquer l’infection des épithéliums adjacents. De plus, une étude clinique menée sur une petite cohorte de patients traités pour parodontite met en évidence une corrélation entre la diminution de la charge EBV salivaire et l’amélioration clinique de patients après traitement. Si ce résultat se confirme, il constituerait un argument supplémentaire en faveur d’une contribution de l’infection parodontale par EBV à la globalité de la charge EBV salivaire. En conclusion, nos données mettent en évidence la présence quasi constante d’EBV dans deux types de lésions orales inflammatoires. Cette infection virale contribue à aggraver une situation inflammatoire locale associée ou pas à une dysbiose bactérienne. L’observation majeure concerne la présence, souvent massive, de plasmocytes infectés dont le rôle reste à identifier. Ces observations constituent des avancées significatives qui permettent d’étayer un nouveau modèle de pathogénie orale associant virus et bactéries. / The oral cavity is a major entry point and reservoir site for a variety of viruses. Apart from herpesvirus simplex, few virological studies detail the role of oral pathogenic viruses, including Epstein-Barr virus. The consensus is that oral inflammation occurs mainly in response to bacterial and fungal infections causing dysbiosis of the oral biofilm. However, this model is not perfect and does not explain well the recurrences observed after decontamination, the decoupling between dysbiosis and inflammatory outbreaks, the proximity of affected and healthy teeth in a similar bacterial environment. The hypothesis of a synergistic mechanism combining viruses and bacteria has been proposed for periodontitis. According to this model, the complementary action of the 2 types of infectious agents on the immune microenvironment would promote inflammatory chronicity and disease progression. Our work focuses on the study of oral cavity infection with EBV. EBV is a ubiquitous virus that persistently infects humans. The oral cavity is the preferred site for its replication with almost constant saliva production. In addition to a major transformative role, EBV's involvement is also suspected for several inflammatory diseases. First, we focused on oral plan lichen (OPL), an autoimmune disease whose etiopathogeny is not clearly established. On biopsies of patients with OPL (n=99), we demonstrated by in situ hybridization that OPL is frequently infected with EBV (74%), particularly in erosive clinical forms. We show that the degree of infiltration of lesions by EBV-infected cells (EBV+) is correlated with inflammatory parameters and that the infiltrated EBV+ cells are plasma cells. This brings a new element to the extent that plasma cells are recognized as major regulatory immune cells. We describe different cytokinic profiles between infected and uninfected OPL, although it is not possible at this stage to directly involve plasma cells. We confirm by electron microscopy that plasma cells host the late stages of the EBV cycle and produce virions in the OPL, suggesting a local amplification mechanism of infection. Then, we focused on periodontitis, a common chronic inflammatory disease that destroys the periodontal structure and causes tooth loosening. This disease is clearly identified as an aggravating factor in many systemic diseases. Our studies had already shown a direct link between EBV infection and the severity of periodontitis. My work has shown that the inflammatory periodontium is infiltrated by EBV+ cells, which appear to be predominantly plasma cells. The presence of virus-producing plasma cells within the inflammatory lesion may explain the infection of adjacent epithelia. In addition, a clinical study conducted on a small cohort of patients treated for periodontitis showed a correlation between the decrease in salivary EBV load and the clinical improvement of patients after treatment. If this result is confirmed, it would be an additional argument in favour of a contribution of periodontal EBV infection to the overall salivary EBV burden. In conclusion, our data show the almost constant presence of EBV in two types of inflammatory oral lesions. This viral infection contributes to worsening a local inflammatory situation associated or not with bacterial dysbiosis. The main observation concerns the presence, often massive, of infected plasma cells whose role remains to be identified. These observations represent significant advances that support a new model of oral pathogenesis combining viruses and bacteria.

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