Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-07-04T15:16:01Z No. of bitstreams: 1 NayanaLuizaSoaresDeAraujo_DISSERT.pdf: 1427716 bytes, checksum: 6cc1c5e30b4f0f15a2673d02cc77cec2 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-07-14T15:20:22Z (GMT) No. of bitstreams: 1 NayanaLuizaSoaresDeAraujo_DISSERT.pdf: 1427716 bytes, checksum: 6cc1c5e30b4f0f15a2673d02cc77cec2 (MD5) / Made available in DSpace on 2017-07-14T15:20:22Z (GMT). No. of bitstreams: 1 NayanaLuizaSoaresDeAraujo_DISSERT.pdf: 1427716 bytes, checksum: 6cc1c5e30b4f0f15a2673d02cc77cec2 (MD5) Previous issue date: 2017-02-24 / Quimiocinas atuam no recrutamento e acumula??o de leuc?citos durante o processo inflamat?rio e por este papel t?m importante participa??o no desenvolvimento das diferentes manifesta??es cl?nicas da doen?a de Chagas. O objetivo deste estudo foi avaliar a express?o de quimiocinas e receptores de quimiocinas em pacientes com as diferentes formas cl?nicas desta doen?a. A quantifica??o do RNA mensageiro (RNAm) das quimiocinas (CCL1, CCL2, CCL3, CCL4, CCL5, CCL17, CCL22, CCL24, CCL27, CCL28, CXCL9, CXCL10) e receptores de quimiocinas (CCR2, CCR3, CCR4, CCR5, CCR6, CCR7, CCR8, CCR10, CXCR3) de pacientes com as formas indeterminada (n=18), card?aca (n=17), digestiva (n=15) e cardiodigestiva (n=15) foi realizada a partir de c?lulas mononucleares de sangue perif?rico (CMSP), por PCR em tempo real. Pacientes com a forma card?aca apresentaram maior express?o relativa de RNAm de CXCL9, CXCL10, CXCR3 e CCR5 quando comparados aos pacientes com a forma indeterminada. Por outro lado, pacientes com a forma digestiva mostraram elevada express?o de transcritos de CCR3 em rela??o aos pacientes com as formas indeterminada e card?aca, al?m disso, houve correla??o positiva entre a express?o desse receptor com a dimens?o do sigmoide. A express?o relativa de CCL5 foi maior em pacientes com a forma cardiodigestiva em compara??o aos pacientes com as formas card?aca e indeterminada. CXCL9, CXCL10, CXCR3 e CCR5 participam da migra??o de c?lulas do perfil de resposta Th1 e a elevada express?o dos seus RNAm em pacientes com cardiomiopatia chag?sica indica a contribui??o dessas mol?culas no processo inflamat?rio no tecido card?aco. Pacientes com a forma digestiva apresentaram maior express?o relativa de CCR3, receptor envolvido com o perfil Th2 de resposta imune, indicando a poss?vel polariza??o para este perfil no desenvolvimento da forma digestiva. O envolvimento de quimiocinas e seus receptores no desenvolvimento das diferentes formas cl?nicas da doen?a de Chagas pode fornecer uma melhor compreens?o dos mecanismos de patog?nese da doen?a. / Chemokines act in the recruitment and accumulation of leukocytes during the inflammatory process and play an important role in the development of the different clinical forms of Chagas? disease. The aim of this study was to evaluate the expression of chemokines and chemokine receptors in patients with the different clinical forms of this disease. The mRNA quantification of chemokines (CCL1, CCL2, CCL3, CCL4, CCL5, CCL17, CCL22, CCL24, CCL27, CCL28, CXCL9, CXCL10) and chemokine receptors (CCR2, CCR3, CCR4, CCR5, CCR6, CCR7, CCR8, CCR10, CXCR3) in patients with indeterminated form (n=18), cardiac form (n=17), digestive form (n=15) and cardiodigestive form (n=15) was performed in peripheral-blood mononuclear cells (PBMC) by real-time PCR. Patients with the cardiac form displayed higher mRNA expression of CXCL9, CXCL10, CXCR3 and CCR5, than patients with indeterminate form. On the other hand, patients with the digestive form showed high transcript expression of CCR3, when compared to patients with indeterminate and cardiac clinical forms of the disease. In addition there was positive correlation beteween CCR3 mRNA expression and sigmoid dimension. The relative expression of CCL5 was higher in cardiodigestive patients compared to those with the cardiac and indeterminate forms. CXCL9, CXCL10, CXCR3 and CCR5 participate in the migration of Th1-profile cells and the high expression in patients with chagasic cardiomyopathy indicates their contribution in the cardiac inflammatory process. Patients with digestive form showed high of CCR3 mRNA expression which is involved with Th2 immune profile, indicating possible polarization for this profile in development of digestive form of disease. The involvement of chemokines and chemokine receptors in different clinical forms of Chagas? disease may provide a better understanding of the mechanism of disease pathogenesis.