Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-29T22:55:50Z No. of bitstreams: 1 AdrianaCostaDeSouzaMartinsCamara_TESE.pdf: 3396087 bytes, checksum: b8e35eee4bb9ca8e4392251f05ab7935 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-02T19:21:41Z (GMT) No. of bitstreams: 1 AdrianaCostaDeSouzaMartinsCamara_TESE.pdf: 3396087 bytes, checksum: b8e35eee4bb9ca8e4392251f05ab7935 (MD5) / Made available in DSpace on 2016-03-02T19:21:41Z (GMT). No. of bitstreams: 1 AdrianaCostaDeSouzaMartinsCamara_TESE.pdf: 3396087 bytes, checksum: b8e35eee4bb9ca8e4392251f05ab7935 (MD5) Previous issue date: 2015-02-26 / Altera??es epiteliais observadas em queilites act?nicas (QA) e carcinomas epiderm?ides de l?bio inferior (CELI) s?o causadas principalmente pela exposi??o cr?nica aos raios ultra-violetas (UV) e s?o estudadas usando diferentes marcadores imuno-histoqu?micos procurando avaliar o processo da carcinog?nese. O objetivo deste estudo foi avaliar comparativamente a express?o das prote?nas Ki-67 e IMP-3 em QA e CELI a fim de contribuir com informa??es adicionais sobre a carcinog?nese em l?bio inferior. Foram estudados 33 casos de QA e 33 casos de CELI, sendo analisadas as caracter?sticas cl?nico-patol?gicas e a imunoexpress?o do Ki-67 e IMP-3. A an?lise imuno-histoqu?mica do Ki-67 se deu atrav?s da determina??o do ?ndice de prolifera??o (IP) e subsequente classifica??o dos casos de acordo com os escores : 0 (0% de c?lulas positivas), +1(?30%), +2 (>30% a ?60%) e +3 (>60%). Para aplica??o dos testes estat?sticos os casos foram classificados em: sem marca??o (escore 0), baixa express?o (escore +1) e alta express?o (escores +2 e +3). Para a express?o do IMP-3, foi estabelecido o percentual de c?lulas epiteliais imunomarcadas, sendo atribu?dos os escores: 0 (correspondeu a 0%), +1 (at? 30% das c?lulas positivas); +2 (entre 30% a 60% de c?lulas imunomarcadas) e +3 (acima de 60% das c?lulas positivas). Foram utilizados os testes estat?sticos Qui-quadrado de Pearson, Mann-Whitney e Wilcoxon. O n?vel de signific?ncia adotado foi de 5%. A maioria dos caos de QA foi do sexo masculino (78,8%), com m?dia de idade de 50 anos e dos casos de CELI tamb?m predominou o sexo masculino (69,89%) com m?dia de 62 anos. O Ki-67 se expressou em todos os casos de QAs bem como nos casos de CELI, predominando nas duas les?es o escore 2, correspondendo a 81,8% dos casos nas QAs e 54,5% nos CELI. A express?o do IMP-3 nas QAs ocorreu em 72,7% dos casos, com predomin?ncia em 36,3% dos casos do escore 1. J? nos CELI o IMP-3 se expressou em 60,6% dos casos, com predomin?ncia em 27,3% dos casos do escore 3. Estes resultados nos permite concluir que a express?o do IMP3 e da atividade proliferativa s?o eventos precoces na carcinog?nese de l?bio inferior independente do estado da altera??o. / Epithelial changes observed in actinic cheilitis (AC) and squamous cell carcinoma of the lower lip (LLSCC) are mainly caused by chronic exposure to ultraviolet rays (UV) and are studied using different immunohistochemical markers trying to evaluate the process of carcinogenesis. The objective of this study was to comparatively evaluate the expression of Ki-67 proteins and IMP-3 in AC and LLSCC to contribute with additional information on carcinogenesis in lower lip. A total of 33 cases of AC and 33 cases of LLSCC were studied, analyzed the clinical and pathological features and immunostaining of Ki-67 and IMP-3. Immunohistochemical analysis of Ki-67 was made through the determination of the proliferation index (PI) and subsequent classification of the cases according to the scores: 0 (0% positive cells) +1 (?30%) + 2 (> 30% and ?60%) and +3 (> 60%). For statistical tests cases were classified as unmarked (score 0), low expression (score +1) and high expression (scores +2 and +3). For the expression of IMP-3, the percentage of immunostained epithelial cells was established, and assigned scores: 0 (corresponding to 0%), +1 (up to 30% of positive cells); +2 (From 30% to 60% of immunostained cells) and +3 (over 60% of positive cells). Statistical tests chi-square test, Mann-Whitney and Wilcoxon were used. The significance level was 5%. Most AC chaos was male (78.8%) with mean age of 50 years and cases of LLSCC also were male (69.89%) with an average of 62 years. The Ki-67 was expressed in all cases of AC and in cases of LLSCC, predominantly in the two injuries the score 2, corresponding to 81.8% of cases in ACs and 54.5% in the CELI. The expression of IMP-3 in ACs occurred in 72.7% of cases, predominantly in 36.3% of LLSCC cases score 1. Already in the IMP-3 was expressed in 60.6% of cases, especially in 27.3% of the score of the cases 3. These results allow us to conclude that the expression of IMP3 and proliferative activity are early events in carcinogenesis independently lower lip state of change.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-29T22:55:50Z No. of bitstreams: 1 JoseNazarenoMoreiraDeAguiarJunior_TESE.pdf: 2810253 bytes, checksum: d577f52edf024bf1bd64c021a5bed745 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-02T19:49:24Z (GMT) No. of bitstreams: 1 JoseNazarenoMoreiraDeAguiarJunior_TESE.pdf: 2810253 bytes, checksum: d577f52edf024bf1bd64c021a5bed745 (MD5) / Made available in DSpace on 2016-03-02T19:49:24Z (GMT). No. of bitstreams: 1 JoseNazarenoMoreiraDeAguiarJunior_TESE.pdf: 2810253 bytes, checksum: d577f52edf024bf1bd64c021a5bed745 (MD5) Previous issue date: 2015-02-24 / A doen?a periodontal ? uma condi??o inflamat?ria cr?nica de car?ter infeccioso causada primariamente por bact?rias presentes em um biofilme dent?rio que interagem com o hospedeiro, determinando, assim, a natureza da doen?a resultante. Apesar de j? se conhecer muito sobre a patog?nese destas patologias, ainda n?o se sabe a composi??o exata do perfil de c?lulas T durante a fase ativa da doen?a (Th1, Th2 ou Th17). Este trabalho visou avaliar, atrav?s da express?o imuno-histoqu?mica, a presen?a dos marcadores (IL-17, IL-23 e ROR?t), envolvidos na resposta Th 17 em casos de gengiva clinicamente saud?veis (n=32), gengivite induzida pelo biofilme dental (n=30), periodontite cr?nica (n=32) e periodontite agressiva (n=25), objetivando analisar se a express?o e/ou distribui??o destas mol?culas em linf?citos e macr?fagos, presentes no infiltrado inflamat?rio dos tecidos periodontais, influencia na destrui??o tecidual observada nestas doen?as. Foi realizada a an?lise morfol?gica dos casos, onde avaliou-se a intensidade do infiltrado inflamat?rio em leve, moderado e intenso. Para cada caso, nas ?reas mais imunomarcadas, 5 campos foram escolhidos e analisados, tanto em rela??o a intensidade do infiltrado inflamat?rio quanto a quantidade de c?lulas imunomarcadas, baseando-se em escores predeterminados: escore 0 (aus?ncia de infiltrado inflamat?rio/imunomarca??o), escore 1 (o infiltrado/imunomarca??o abrangia menos de 25% da ?rea do campo), escore 2 (o infiltrado/imunomarca??o ocupava entre 25 e 50%) e escore 3 (infiltrado/imunomarca??o presente em mais de 50% da ?rea do campo). A partir disto, gerouse uma mediana que representava cada caso. A intensidade do infiltrado inflamat?rio foi correlacionada com a progress?o da doen?a, se mostrando crescente da gengiva clinicamente saud?vel at? a periodontite agressiva (p<0,001). Detectou-se a presen?a da IL-17, IL-23 e do ROR?t na maioria dos casos avaliados e a quantidade de c?lulas imunomarcadas foi correlacionada tanto com a intensidade do infiltrado inflamat?rio (P<0,001) quanto com os par?metros cl?nicos analisados (P<0,001), apresentando uma correla??o positiva, predominantemente moderada. A periodontite agressiva apresentou um maior percentual de imunomarca??o em rela??o ?s outras condi??es cl?nicas avaliadas, para todos os marcadores, sugerindo uma poss?vel associa??o destes marcadores com a progress?o desta doen?a, onde quanto maior a perda de suporte periodontal, maior a quantidade do infiltrado inflamat?rio e maior n?mero de c?lulas imunomarcadas. / Periodontal disease is a chronic inflammatory condition primarily caused by bacteria in dental biofilm, which interact with the host, thus determining the nature of the resulting disease. Despite the wide knowledge about the pathogenesis of these diseases, the exact composition of the T cell profile during the active phase of the disease (Th1, Th2 or Th17) remains unknown. This study aimed to evaluate by immunohistochemical expression, the presence of the markers (IL-17, IL-23 and ROR?t), involved in Th17 response in clinically healthy gingiva cases (n = 32), biofilm-induced gingivitis (n = 30), chronic periodontitis (n = 32) and aggressive periodontitis (n = 25), in order to analyze if the expression and/or distribution of these molecules in lymphocytes and macrophages, present in the inflammatory infiltrate of periodontal tissue, influences the tissue destruction observed in these diseases. The morphological analysis of cases was performed which assessed the intensity of the inflammatory infiltrate in mild, moderate and intense. For each case, in the area with the most representative immunostaining, 5 fields were chosen and analyzed, both for the intensity of the inflammatory infiltrate as for the quantity of immunostained cells, based on predetermined scores: score 0 (absence of inflammatory infiltrate/immunostaining), score 1 (the infiltrate/immunostaining covered less than 25% of the field area), score 2 (the infiltrate/immunostaining occupied between 25 and 50%) and score 3 (infiltrate/immunostaining present in over 50% of the field area). From this, a median was generated representing each case. The intensity of the inflammatory infiltrate correlated with the disease progression, in other words, it was crescent from clinically healthy gingiva to aggressive periodontitis (P <0.001). It was detected the presence of IL-17, IL-23 and ROR?t in most of the evaluated cases and the number of immunostained cells correlated with the intensity of the inflammatory infiltrate (P <0.001) and with the clinical parameters analyzed (P <0.001), showing a positive correlation, mainly moderate. Aggressive periodontitis showed a higher percentage of immunostaining for all markers in relation to other clinical conditions assessed, suggesting a possible association of these markers with the progression of this disease, in which the higher the loss of periodontal support, the greater the amount of inflammatory infiltrate and larger the number of immunostained cells.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-11T17:13:30Z No. of bitstreams: 1 EduardoAlonsoCruzMonroy_DISSERT.pdf: 2026837 bytes, checksum: 07d08221eedeeea6100a427aaf6ca1d9 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-14T17:30:27Z (GMT) No. of bitstreams: 1 EduardoAlonsoCruzMonroy_DISSERT.pdf: 2026837 bytes, checksum: 07d08221eedeeea6100a427aaf6ca1d9 (MD5) / Made available in DSpace on 2016-07-14T17:30:27Z (GMT). No. of bitstreams: 1 EduardoAlonsoCruzMonroy_DISSERT.pdf: 2026837 bytes, checksum: 07d08221eedeeea6100a427aaf6ca1d9 (MD5) Previous issue date: 2016-02-26 / Les?es odontog?nicas epiteliais benignas s?o entidades de grande import?ncia cl?nica que se desenvolvem nos ossos maxilares a partir dos tecidos que formam os dentes. Tem sido demonstrado que em tumores benignos e malignos, est?o presentes um grande n?mero de c?lulas tronco tumorais, as quais tem grandes implica??es no desenvolvimento dos tumores. Oct-4 e CD44 t?m sido demostrados como importantes marcadores para c?lulas-tronco tumorais. O objetivo deste estudo foi identificar c?lulas epiteliais que expressam marcadores de c?lulas tronco atrav?s da express?o imuno-histoqu?mica de Oct-4 e CD44 em uma s?rie de casos de les?es odontog?nicas epiteliais ben?gnas. A amostra foi constitu?da por 20 casos de ceratocisto odontog?nico (CCO), 20 caos de Ameloblastoma s?lido/multic?stico e 20 casos de Tumor Odontog?nico Adenomatoide (TOA). A express?o de Oct-4 e CD44 foi avaliada no epit?lio das les?es atrav?s do percentual de c?lulas positivas(PP) e da intensidade da express?o ( IE ), sendo realizado o somat?rio destes escores, resultando na Pontua??o de Imunomarca??o Total (PIT) que variou de 0 a 7. Os resultados do presente estudo foram analisados pelo valor da pontua??o de PIT. Todos os casos apresentaram positividade para os dois marcadores e a maioria exibiu alta express?o para ambos os marcadores. A an?lise da express?o de Oct-4 n?o revelou diferen?as estatisticamente significativas (p = 0,406) entre as les?es estudadas. Com rela??o ? express?o do CD44, houve diferen?a estatisticamente significativa entre os casos de ameloblastoma e CCO, apresentando este ?ltimo maior n?mero de casos no score 7 (p = 0,034). Na analise da correla??o da imunoexpress?o de ambos os marcadores nas tr?s les?es estudadas, n?o houve correla??o estatisticamente significativa . Os resultados do presente estudo identificaram a presen?a de c?lulas com caracter?sticas troncais dispostas em locais variados do componente epitelial das les?es ora estudadas sugerindo a sua poss?vel participa??o na histog?nese e diferencia??o em les?es odontog?nicas epiteliais benignas contribuindo assim para o desenvolvimento destas les?es. / benign epithelial odontogenic lesions are great clinical importance entities that develop in the jaws from the tissues that form teeth. It has been shown that in benign and malignant tumors, are present in a large number of tumor stem cells, which has great implications in the development of these lesions. Oct-4 and CD44 have been demos as important markers for tumoral stem cells. The objective of this study was to identify epithelial cells expressing stem cell markers by immunohistochemical expression of Oct-4 and CD44 in a series of cases of benign epithelial odontogenic lesions. The sample was comprised of 20 cases of odontogenic keratocyst (OKC), 20 cases of solid/multicystic ameloblastoma and 20 cases of adenomatoid odontogenic tumor (AOT). The expression of Oct-4 and CD44 was evaluated in epithelial lesions using the percentage of positive cells (PP) and the intensity of expression (IE), being realized the sum of these scores, resulting in Total Immunostaining Score (TIS) ranging 0 to 7. The results were submitted to the appropriate statistical test (nonparametric Kruskal-Wallis and Spearman correlation coefficient). All cases were positive for both markers and most showed high expression of both markers. The analysis of Oct-4 expression revealed no statistically significant differences (p = 0.406) among the studied lesions. Regarding the CD44 expression, there was a statistically significant difference between the cases of ameloblastoma and TOA in relation to the CCO, with the latter show more cases in the score 7 (p = 0.034). In the correlation analysis of the immunoreactivity of both markers in the three lesions studied, there was no statistically significant correlation. The results of this study identified the presence of cells with stemness characteristics arranged at various sites in the epithelial component of the studied lesions suggesting their possible role in the histogenesis and differentiation in benign epithelial odontogenic lesions, thus contributing to the development of these lesions.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-11T17:13:30Z No. of bitstreams: 1 LeorikPereiraDaSilva_DISSERT.pdf: 1755248 bytes, checksum: 7c7295f3b5a7cf31b5ae4aa23ab61afd (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-14T22:02:14Z (GMT) No. of bitstreams: 1 LeorikPereiraDaSilva_DISSERT.pdf: 1755248 bytes, checksum: 7c7295f3b5a7cf31b5ae4aa23ab61afd (MD5) / Made available in DSpace on 2016-07-14T22:02:14Z (GMT). No. of bitstreams: 1 LeorikPereiraDaSilva_DISSERT.pdf: 1755248 bytes, checksum: 7c7295f3b5a7cf31b5ae4aa23ab61afd (MD5) Previous issue date: 2016-02-19 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Introdu??o: A endonuclease apur?nica/apurimid?nica (APE-1) ? uma prote?na essencial para a via do reparo por excis?o de bases (BER) do DNA, al?m de regula??o de atividades redox. A capacidade de c?lulas malignas em reconhecer e reparar danos no DNA ? um mecanismo importante para sobreviv?ncia tumoral, e estudos recentes sugerem que a superexpress?o da APE-1 pode se relacionar com o pobre progn?stico em alguns tumores. Objetivo: Analisar a imunoexpress?o da APE-1 em Adenomas Pleom?rficos (AP) e Carcinomas Ex-Adenomas Pleom?rficos (CaExAP) de gl?ndulas salivares. Materiais e M?todos: Foram selecionados 49 tumores fixados em formol e inclu?dos em parafina (33 AP e 16 CaExAP) que foram submetidos a estudo imuno-histoqu?mico pela t?cnica da imunoperoxidase. A imunoexpress?o da APE-1 foi avaliada de forma quantitativa pelo percentual de c?lulas imunopositivas. Para an?lise estat?stica foi adotado n?vel de signific?ncia de 5% (p ? 0,05). Resultados: Todos os casos de AP e CaExAP (n=49) foram positivos para APE-1, no entanto, houve maior express?o em CaExAP havendo diferen?a estatisticamente relevante (p<0,001). N?o foi encontrada associa??o da express?o da APE-1 entre tumores de gl?ndula salivar maior ou menor, entretanto, em AP n?o encapsulados (Mediana de express?o= 54,2%) houve maior express?o quando comparados a tumores encapsulados (p=0,02). A superexpress?o da APE-1 foi constatada principalmente em casos de CaExAP com met?stase linfonodal (Mediana de express?o= 90,3% - p=0,002) e padr?o invasivo (Mediana de express?o= 89,9% - p=0,003) quando comparados aos casos sem met?stase e intracapsulares. Conclus?o: Este estudo sugere que a APE-1 encontra-se desregulada nos tumores estudados. A maior express?o da APE-1 est? associada com a aus?ncia de c?psula completa em AP e a superexpress?o est? relacionada com o comportamento mais agressivo do CaExAP. / Introduction: Apurinic/Apyrimidinic Endonuclease 1 (APE-1) is an essential protein for DNA base excision repair (BER) pathway and regulation of redox activities. The ability of malignant cells to recognize and repair DNA damage is an important mechanism for tumor survival, and recent studies suggest that APE-1 overexpression is related to poor prognosis in some tumors. Purpose: To analyze the immunoreactivity of APE-1 in Pleomorphic Adenomas (PA) and Carcinomas Ex Pleomorphic Adenomas (CaExPA) of salivary glands. Materials and Methods: A total of 49 tumors fixed in formalin and embedded in paraffin (33 PA and 16 CaExPA) underwent immunohistochemical study by the immunoperoxidase technique. APE-1 immunoreactivity was evaluated quantitatively by the percentage of immunopositive cells. For statistical analysis a significance level of 5% (p? 0.05) was adopted. Results: All cases of PA and CaExPA (n=49) were positive for APE-1, however, there was a higher expression in CaExPA, with statistically significant difference (p<0.001). There was no association between APE-1 expression and tumors of major or minor salivary gland, however, not encapsulated PA (median expression = 54.2%) showed higher expression when compared to encapsulated tumors (p=0.02). APE-1 overexpression was found mainly in cases of CaExAP with lymph node metastasis (median expression = 90.3% - p=0.002) and invasive pattern (median expression = 89.9% - p=0.003), when compared to cases without metastasis and intracapsular pattern. Conclusion: This study suggests that APE-1 is deregulated in the studied tumors. The increased expression of APE-1 is associated with the absence of complete capsule in PA and it is associated with more aggressive behavior in CaExPA.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-11T17:13:30Z No. of bitstreams: 1 MaraLuanaBatistaSevero_DISSERT.pdf: 1279812 bytes, checksum: d55a74719b46a51718b7399d61a2a556 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-15T18:45:17Z (GMT) No. of bitstreams: 1 MaraLuanaBatistaSevero_DISSERT.pdf: 1279812 bytes, checksum: d55a74719b46a51718b7399d61a2a556 (MD5) / Made available in DSpace on 2016-07-15T18:45:17Z (GMT). No. of bitstreams: 1 MaraLuanaBatistaSevero_DISSERT.pdf: 1279812 bytes, checksum: d55a74719b46a51718b7399d61a2a556 (MD5) Previous issue date: 2016-02-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Objetivo desse estudo foi analisar a imunoexpress?o de receptores de calcitonina (CTRs) e glicocorticoides (GCRs) em les?es centrais de c?lulas gigantes (LCCGs) agressivas e n?o agressivas. Trata-se de um estudo imuno-histoqu?mico (t?cnica da imunoperoxidase), quantitativo e descritivo de 52 casos de LCCGs dos ossos maxilares, nos quais 13 pacientes portadores de LCCG foram tratados com triancinolona intralesional ou calcitonina spray intranasal. A m?dia de imunomarca??o foi comparada entre os tipos celulares e subtipo cl?nico da les?o. O teste de Mann-Whitney foi realizado para essas compara??es. Dos 52 casos de LCCGs, 53.8% eram do g?nero feminino, com uma m?dia de idade de 25.69 anos. A mand?bula foi o s?tio anat?mico mais acometido. Trinta casos (57.7%) foram de LCCGs agressivas e 22 (42.3%) de n?o agressivas. A cirurgia foi o tratamento de escolha em 75% das LCCGs estudadas. Em 56.7% das LCCGs agressivas foi realizada cirurgia, enquanto 43.4% foram submetidas ao tratamento conservador. Dos submetidos ao tratamento conservador, a maioria (n = 8; 61.5%) respondeu bem ao tratamento. A express?o de CTR foi evidenciada em 67.3% da amostra e para o GCR em 96.15% dos casos. N?o houve diferen?a estatisticamente significante entre a express?o de CTRs e GCRs em c?lulas mononucleares e multinucleadas das LCCGs em rela??o ? agressividade, em rela??o ao tratamento realizado para os casos de les?es agressivas e em rela??o ? resposta ao tratamento conservador realizado nos casos de LCCGs agressivas (p>0.05). Os resultados da nossa pesquisa sugerem que a imunoexpress?o dos CTRs e GCRs n?o influenciou na resposta ao tratamento cl?nico com calcitonina ou triancinolona na amostra estudada e exibiu uma express?o variada independente da agressividade da les?o. / The aim of this study was to analyze the immunoexpression of calcitonin (CTR) and glucorticoid (GCR) receptors in aggressive and non-aggressive central giant cell lesions (CGCL). This is an immunohistochemistry study (immunoperoxidase technique) of 52 cases of CGCL of the jaws, in which 12 patients were treated with intralesional triamcinolone injections and one with calcitonin nasal spray. The mean of immunostaining was compared between the cell types and clinical subtype of the lesion. The correlations among means were analyzed by Mann-Whitney test. Of the 52 cases studied, 53.8% were females, with a mean of 25.69 years. Most lesions were located in the mandible. Thirty patients (57.7%) had aggressive lesions and 22 (42.3%) of the cases consisted of non-aggressive lesions. Surgery was the treatment of choice in 75% of the cases. In 56.7% of the aggressive CGCL surgery was performed, while 43.4% of patients were submitted to conservative treatment. Among cases submitted to conservative treatment, the majority (n = 8; 61.5%) responded well to treatment. CTR expression was observed in 67.3% and GCR in 96.15% of cases. There was no significant statistical difference between the expression of CTRs and GCRs in mononuclear and multinucleated CGCLscells, regarding aggressiveness, treatment performed for aggressive lesions and the response to conservative treatment (p>0.05). The results of our research suggest that the immunoreactivity of CTRs and GCRs did not influence the response to clinical treatment with calcitonin or triamcinolone in the sample studied and it exhibited a varied expression regardless of the aggressiveness of the lesion.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T23:14:34Z No. of bitstreams: 1 AngelicaLopesCordeiroMandu_DISSERT.pdf: 8297335 bytes, checksum: a571100e33585465a7dd9329c7047ab6 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-04T20:58:54Z (GMT) No. of bitstreams: 1 AngelicaLopesCordeiroMandu_DISSERT.pdf: 8297335 bytes, checksum: a571100e33585465a7dd9329c7047ab6 (MD5) / Made available in DSpace on 2016-08-04T20:58:54Z (GMT). No. of bitstreams: 1 AngelicaLopesCordeiroMandu_DISSERT.pdf: 8297335 bytes, checksum: a571100e33585465a7dd9329c7047ab6 (MD5) Previous issue date: 2016-02-18 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Os nevos melanoc?ticos (NMs) s?o prolifera??es benignas de c?lulas n?vicas, que podem serencontradas na pele e em mucosas de revestimento, incluindo a mucosa oral. Contudo, osNMs cut?neos s?o mais comuns, quando comparados os que acometem a mucosa oral. Osmecanismos moleculares envolvidos no desenvolvimento dos nevos e os fatores que podeminfluenciar no padr?o de migra??o das c?lulas n?vicas s?o pouco explorados. O objetivo destapesquisa foi analisar a express?o imuno-histoqu?mica das prote?nas E-caderina e Bcl-2 emNMs orais/cut?neos e relacion?-las com as caracter?sticas cl?nicas (sexo, idade, localiza??o,exposi??o ? radia??o solar) e tipos histopatol?gicos. Foram analisados 36 casos de NMs orais34 de NMs cut?neos. Foi utilizada a t?cnina de imuno-histoqu?mica das prote?nas E-caderinae bcl-2, na qual foram analisados a intensidade (fraca, intermedi?ria e forte) e distribui??o demarca??o (focal e difusa). A imunoexpress?o tamb?m foi analisada quanto aos tipos de c?lulasn?vicas (A, B e C). A an?lise estat?stica foi realizada atrav?s dos testes de Qui-Quadradode Pearson e Correla??o de Spearman com n?vel de signific?ncia estabelecido em 5%. Dos 70casos de NMs, 82,9% eram do sexo feminino, 48,6% com idade entre 26-50 anos, 60% eramda ra?a branca, 51,4% foram diagnosticados histopatologicamente como nevos intrad?rmicos/intramucosos e 80% eram NMs adquiridos. A express?o imuno-histoqu?mica da bcl2 e Ecaderinaforam vari?veis na amostra e n?o exibiram associa??o com os par?metros cl?nicos. Aexpress?o da bcl-2 e E-caderina foram vari?veis de acordo com os tipos de c?lulas n?vicas (A,B e C) (p=0,001). A express?o da bcl-2 foi mais difusa em NMs cong?nitos (p=0,002). A Ecaderinafoi positiva em 83,3% dos NMs <1cm (p=0,001) e em exibiu uma fraca marca??oem 73,9% dos NMs que se encontravam em ?reas expostas (p=0,010). Com base nestes resultados,sugere-se que a E-caderina tenha um controle na determina??o dos tipos histopatol?gicosdos NMs, e que a bcl-2 seja um poss?vel marcador de NMs com maior susceptibilidade aodesenvolvimento de les?es malignas. / Melanocytic nevi (MNs) are benign melanocytic proliferations of cells, which can be found in the skin and mucous coat, including the oral mucosa. However, skin NMs are more common when compared to those that affect the oral mucosa. The molecular mechanisms involved in the development of nevi and the factors that can influence the migration pattern of the nevus cells are little explored. The aim of this study was to analyze the immunohistochemical expression of E-cadherin protein and Bcl-2 in oral / skin NMs and relate them to the clinical characteristics (gender, age, location, exposure to solar radiation) and histopathological types. 36 cases of oral NMs and 34 Skin NMs were analyzed. The immunohistochemistry was used of the protein E-cadherin and bcl-2, which were analyzed the intensity (weak, moderate and strong) and distribution marking (diffuse and focal). The immunoreactivity also analyzed as to the types of nevus cells (epithelioid cells -A, -B lymphocyte and fibroblast-like -C). Statistical analysis was performed using the chi-square tests of Pearson and Spearman correlation with significance level set at 5%. Of the 70 cases of NMs, 82.9% were female, 48.6% aged 26-50 years, 51.4% were diagnosed histologically as intradermal / intramucosal nevi and 80% were NMs acquired. Immunohistochemical expression of BCL2 and E-cadherin were variables in the sample and showed no association with clinical parameters. The expression of bcl-2 and E-cadherin were variable according to the types of nevus cells (A, B and C) (P = 0.001). The expression of bcl-2 was more diffuse in congenital MNs (p = 0.002). E-cadherin was positive in 83.3% of MNs <1cm (p = 0.001) and exhibited weak staining in 73.9% of MNs that were in exposed areas (p = 0.010). Based on these results, it is suggested that the E-cadherin has a modulating effect on the migratory properties of NMs, and bcl-2 is a marker of MNs with increased proliferative capacity.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-03-21T11:50:05Z No. of bitstreams: 1 AndreiaFerreiraDoCarmo_TESE.pdf: 2170675 bytes, checksum: 49a8001d1651a77b1ebea9cb5d0cc766 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-03-23T11:55:44Z (GMT) No. of bitstreams: 1 AndreiaFerreiraDoCarmo_TESE.pdf: 2170675 bytes, checksum: 49a8001d1651a77b1ebea9cb5d0cc766 (MD5) / Made available in DSpace on 2018-03-23T11:55:44Z (GMT). No. of bitstreams: 1 AndreiaFerreiraDoCarmo_TESE.pdf: 2170675 bytes, checksum: 49a8001d1651a77b1ebea9cb5d0cc766 (MD5) Previous issue date: 2017-12-15 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O horm?nio glicoproteico estaniocalcina 2 (STC2) est? envolvido na carcinog?nese e progress?o de muitos tipos de c?ncer. No entanto, seu significado cl?nico e mecanismos moleculares no carcinoma de c?lulas escamosas oral (CCEO) foram pouco estudados e permanecem incertos. O presente estudo investigou associa??es da express?o da STC2 com par?metros clinicopatol?gicos e de sobrevida em pacientes com CCEO. Al?m disso, foram avaliados os efeitos biol?gicos causados pela redu??o dos n?veis de STC2 em linhagens celulares de CCEO e fibroblastos associados ao c?ncer (do ingl?s CAF ? carcinoma associated fibroblasts). A an?lise imunoistoqu?mica em 100 casos de CCEOs prim?rios indicou que a superexpress?o da STC2 foi associada com o par?metro N do sistema TNM e foi um fator de risco independente para sobrevida espec?fica da doen?a e sobrevida livre de doen?a em pacientes com CCEO. Usando ensaios in vitro, foi demonstrado que o silenciamento da STC2 em linhagens de CCEO promoveu a apoptose e reduziu a prolifera??o celular, migra??o, invas?o e transi??o epit?lio-mesenquimal. An?lises adicionais revelaram que o CAF expressa maiores n?veis de STC2 do que as c?lulas de CCEO. O silenciamento da STC2 no CAF reduziu a invas?o celular do CCEO, sugerindo que a STC2 liberada por CAFs contribui para um fen?tipo mais invasivo no CCEO. Esses resultados sugerem que a STC2 modula eventos importantes para a tumorig?nese oral e pode ser um biomarcador progn?stico para pacientes com CCEO. / The glycoprotein hormone stanniocalcin 2 (STC2) is involved in carcinogenesis and progression of several cancer types. However, its clinical significance and molecular mechanisms in oral squamous cell carcinoma (OSCC) have been partially studied and remain uncertain. In the present study, we investigated associations of STC2 expression with clinicopathological and survival parameters of OSCCs patients. We also determined the biological effects caused by STC2 downregulation in OSCC and cancer associated fibroblasts (CAF) cell lines. Immunohistochemical analysis in 100 cases of primary OSCC indicated that STC2 overexpression was associated with N stage (TNM staging) and was an independent risk factor for disease-specific survival and disease-free survival in patients with OSCC. Using in vitro assays, we demonstrated that STC2 knockdown in OSCC cell lines promoted apoptosis, and reduced cell proliferation, migration, invasion and epithelial-mesenchymal transition. Further analysis revealed that CAF expresses higher levels of STC2 than OSCC cells. Knockdown of STC2 in CAF reduced OSCC cell invasion, suggesting that STC2 released by CAF contributes to a more invasive phenotype in OSCC. These results suggest that STC2 modulates important events for oral tumorigenesis and can be a prognostic biomarker for OSCC.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-09T22:32:46Z No. of bitstreams: 1 FranciscoJadsonLima_TESE.pdf: 2575689 bytes, checksum: 340044a0e65194ab747c7fc013740317 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-13T20:58:22Z (GMT) No. of bitstreams: 1 FranciscoJadsonLima_TESE.pdf: 2575689 bytes, checksum: 340044a0e65194ab747c7fc013740317 (MD5) / Made available in DSpace on 2017-03-13T20:58:22Z (GMT). No. of bitstreams: 1 FranciscoJadsonLima_TESE.pdf: 2575689 bytes, checksum: 340044a0e65194ab747c7fc013740317 (MD5) Previous issue date: 2016-10-06 / A carcinog?nese de l?bio inferior ? induzida principalmente pela exposi??o cr?nica aos raios ultravioletas do sol, mas muitos dos aspectos moleculares envolvidos neste processo ainda n?o est?o esclarecidos. A prote?na canal de cloro intracelular 4 (CLIC4) ? um canal de cloreto regulado pela prote?na p53 e pelo fator de necrose tumoral ? (TNF-?), que tem sido relacionada com aumento no n?vel do fator de crescimento transformante-? (TGF-?), com a carcinog?nese de pele e diferencia??o de fibroblastos em miofibroblastos. Assim, este estudo teve como objetivo analisar e comparar a express?o imuno-histoqu?micade CLIC4, p53, TGF-b, TNF-a e a-actina de m?sculo liso (a-SMA) em queilitesact?nicas (QA) e no front de invas?o tumoral de carcinomas de c?lulas escamosas de l?bio inferior (CCELI), bem como verificar a rela??o destas entre si e com caracter?sticas cl?nicas e morfol?gicas das les?es. A amostra foi composta de 50casos de QAs e 50de CCELIs com dados cl?nicos dispon?veis, que inicialmente foram submetidos ao estudo morfol?gico para sua grada??o do risco de transforma??o maligna (sistema bin?rio) e do grau histol?gico de malignidade (Bryne, 1998), respectivamente.Todos os casos foram submetidos ao m?todo da imunoperoxidase usando os anticorpos anti-CLIC4, anti-p53, anti-TGF-b, anti-TNF-a e anti-a-SMA, os quais foram submetidos ? an?lise semiquantitativa, com exce??o de p53, que inicialmente foi analisado de forma quantitativa.Compara??es das imunomarca??es nos par?metros cl?nicos e morfol?gicos das les?es foram realizadas pelo teste U de Mann-Whitney e o coeficiente de Spearman foi calculdo para avaliar correla??es entre as prote?nas. O n?vel de signific?ncia de 5% foi adotado.A express?o nuclear da CLIC4 e TGF-?foi estava aumentada em QAs de baixo risco, comparada ao grupo de alto risco (p<0.0001), enquanto CLIC4 citoplasm?tica, p53 e TNF-? exibiram maior express?o em QAs de alto risco (p<0.05). No que diz respeito ?s caracter?sticas cl?nicas e morfol?gicas dos CCELIs, a express?o de CLIC4 no citoplasma de c?lulas tumorais foi maior nos casos apresentando met?stase linfonodal, casos com est?gios cl?nicos mais avan?ados ou com alto grau de malignidade (p = 0,005; p = 0,029; p<0,0001). A express?o de p53 foi maior em CCELIs de alto grau de malignidade do que nos casos de baixo grau (p= 0,001) e a TGF-? diminuiu significativamente conforme o avan?o do est?gio cl?nico e do grau histol?gico dos tumores (p< 0,05).N?o houve diferen?a significativa na express?o de ?-SMA e TNF-?, quando comparando os par?metros cl?nicos e grada??o histol?gica de malignidade dos CCELIs.As QAs exibiram uma express?o aumentada de CLIC4 (no n?cleo, ou n?cleo e citoplasma) e TGF-?, comparadas aos CCELIs (p < 0,0001). Em contraste, houve aumento na marca??o de CLIC4 citoplasm?tica e ?-SMA nos casos de CCELI, quando comparados ?s QAs (p < 0,0001). Nas QAs observou-seuma correla??o negativa entre a express?o de CLIC4 nuclear com CLIC4 citoplasm?tica (r = -0,554; p = <0,0001), e entre a marca??o de TGF-? e ?-SMA (r = -0,309; p = 0,029). Nos carcinomas, a express?o de p53 exibiu correla??o positiva com TNF-? (r = 0,528; p = 0,0001) e ?-SMA (r = 0,435; p = 0,002), enquanto as duas ?ltimas prote?nas exibiram uma fraca correla??o direta entre si (r = 0,293; p = 0,039).Os nossos resultados sugerem que uma mudan?a no padr?o de express?o nuclear para citoplasm?tica de CLIC4 est? envolvida no processo de carcinog?nese labial, acompanhada de altera??es na express?o de p53, TGF-?, TNF-? e ?-SMA, mas nem sempre estes achados se relacionam com os aspectos morfol?gicos e cl?nicos das QAs e CCELIs.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-07-17T13:12:44Z No. of bitstreams: 1 FernandaGinaniAntunes_TESE.pdf: 2184683 bytes, checksum: 53f3cc6dc1251b2dcdc05b91678ae4d3 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-07-18T15:34:49Z (GMT) No. of bitstreams: 1 FernandaGinaniAntunes_TESE.pdf: 2184683 bytes, checksum: 53f3cc6dc1251b2dcdc05b91678ae4d3 (MD5) / Made available in DSpace on 2017-07-18T15:34:49Z (GMT). No. of bitstreams: 1 FernandaGinaniAntunes_TESE.pdf: 2184683 bytes, checksum: 53f3cc6dc1251b2dcdc05b91678ae4d3 (MD5) Previous issue date: 2017-02-23 / O laser de baixa intensidade (LBI) tem apresentado resultados positivos na prolifera??o de diversos tipos celulares in vitro. A primeira parte do trabalho avaliou o efeito do LBI na prolifera??o e viabilidade de c?lulas-tronco da polpa de dentes dec?duos humanos esfoliados (SHED). As c?lulas foram irradiadas ou n?o (controle) com um laser diodo InGaAlP (660 nm, 30 mW, modo de a??o cont?nuo) usando duas diferentes doses (0,5 J/cm2 por 16 segundos e 1,0 J/cm2 por 33 segundos) e os tr?s grupos foram estudados nos intervalos de 0, 24, 48 e 72 h. Foi observado que a dose de 1,0 J/cm2 promoveu um aumento na prolifera??o celular nos intervalos de 48 e 72 h quando comparada ao grupo controle e ? dose de 0,5 J/cm2 e a viabilidade celular n?o foi afetada pela irradia??o ao longo do experimento. Em conjunto, os dados mostraram que os par?metros do LBI utilizados (660 nm, 30 mW, 1,0 J/cm2) promoveram prolifera??o das SHEDs e mantiveram a sua viabilidade. A partir destes resultados favor?veis, a segunda parte do trabalho avaliou o efeito do LBI com os mesmos par?metros na prolifera??o de SHEDs cultivadas sobre arcabou?os nanofibrosos de PLA confeccionados pela t?cnica de eletrofia??o. Este procedimento permite a obten??o de arcabou?os tridimensionais que simulam a matriz extracelular a partir de um biomaterial com propriedades f?sicas favor?veis e baixo custo. Tr?s grupos experimentais (G1 ? n?o irradiado; G2 ? irradiado com 0,5 J/cm2; G3 ? irradiado com 1,0 J/cm2) foram analisados nos intervalos de 24, 48 e 72 h. Os resultados indicaram que o PLA n?o ? citot?xico para as SHEDs e que os grupos submetidos ? laserterapia tiveram maior prolifera??o celular quando comparados com o grupo controle n?o irradiado. Com base nos achados, evidenciou-se que as nanofibras de PLA s?o arcabou?os favor?veis para o cultivo de SHEDs e que a laserterapia estimulou a prolifera??o quando aplicada nas c?lulas cultivadas sobre este arcabou?o. Com base nos dados gerais obtidos, conclui-se que a laserterapia nos par?metros avaliados apresenta efeitos bioestimulat?rios nas SHEDs cultivadas tanto na superf?cie padr?o (pl?stico da placa de cultivo) quanto sobre arcabou?os nanoestruturados de PLA. / The low-level laser therapy (LLLT) has been shown positive results in the in vitro proliferation of several cell types. The first part of the study evaluated the effect of LLLT on the proliferation and viability of stem cells from human exfoliated deciduous teeth (SHED).Cells were irradiated or not (control) with an InGaAlP diode laser (660 nm, 30 mW, continuous action mode) using two different doses (0.5 J/cm2 for 16 seconds and 1.0 J/cm2 for 33 seconds) and the three groups were analyzed at the intervals of 0, 24, 48 and 72 h.It was observed that the dose of 1.0 J/cm2 promoted an increase in cell proliferation at the 48 and 72 h intervals when compared to the control group and the dose of 0.5 J/cm2, and that cell viability was not affected by irradiation throughout the experiment. Taken together, the data showed that the LLLT parameters (660 nm, 30 mW, 1.0 J/cm2) promoted proliferation of SHEDs and maintained their viability. Based on these favorable results, the second part of the study evaluated the effect of LLLT with the same parameters on the proliferation of SHEDs cultured on PLA nanofibrous scaffolds obtained by electrospinning. This procedure allows obtaining three-dimensional scaffolds that mimic the extracellular matrix from a biomaterial with favorable physical properties and low cost.Three experimental groups (G1 - non-irradiated; G2 - irradiated with 0.5 J/cm2; G3 - irradiated with 1.0 J/cm2) were analyzed at 24, 48 and 72 h. The results indicated that PLA is not cytotoxic to SHEDs and that the groups submitted to laser therapy had higher cell growth when compared to the nonirradiated control group. Based on these findings, it was shown that PLA nanofibers are favorable scaffolds for the cultivation of SHEDs and that laser therapy stimulated the proliferation when applied to the cells cultured on this scaffold. Based on the general data obtained, it is concluded that the laser therapy in the evaluated parameters has biostimulatory effects on the proliferation of SHEDs on both the standard surface (plastic of the culture plate) and on nanostructured PLA scaffolds.

Esta pesquisa aborda, a partir de uma perspectiva bioarqueológica comparativa, a problemática das mudanças nos padrões de subsistência associados à intensificação da agricultura e suas implicações no processo de complexificação social na costa dos Andes Centrais. Para tanto, se examinaram indicadores de patologia oral, estresse nutricional e isótopos estáveis, e outros dados paleodietéticos e arqueológicos de 09 populações pré-históricas da costa dos Andes Centrais datadas para o período Formativo (~3000-1 a.C.). Os resultados mostram que as dietas a predomínio de carboidratos são muito antigas na região, inclusive nos sítios litorâneos e que o processo de complexificação ocorreu em presença da agricultura como base econômica. As formações teocráticas do 3ro e 2do milênios a.C. floresceram baseadas na agricultura de tubérculos, leguminosas, árvores frutíferas e milho em menor quantidade (abaixo de 20%), apelando a técnicas agrícolas adaptadas às características de aridez dos vales da bacia do Pacífico. Uma drástica mudança na dieta costeira andina ocorreu entre 500-1 a.C., quando o milho passa ser o principal produto de subsistência ao nível regional em concomitância com o aparecimento de governos seculares. / From a comparative bioarchaeological perspective this research addresses the issue of changes in subsistence patterns associated with the intensification of agriculture on the coast of the Central Andes and their implications to the social complexity process. Markers of oral pathology and nutritional stress were examined, along with stable isotopes, and other paleodietetic and archaeological data of 09 prehistoric coastal populations dated to the Formative period (~3000-1 BC). The results show that the predominance of rich carbohydrate diets is very old in the region, also on shoreline settlements, and the process of complexity was based in agriculture as an economic basis. The theocratic societies of 3rd and 2nd millennium BC flourished based on agriculture of tubers, legumes, fruit trees and corn in smaller quantities (below 20%), using farming techniques highly adapted to the aridity of the Pacific basin valleys. A drastic change in the Andean coastal diet occurred between 500-1 BC, when the corn became the main regional staple concomitant to the appearance of secular governments