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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.
21

Estudo do perfil dos problemas de comportamento e dos índices de qualidade de vida numa coorte pediátrica de enurese monossintomatica / Study of the profile of behavioral problems and quality of life indices in a pediatric cohort of monosymptomatic enuresis

Sousa e Silva, Guilherme Jorge 08 November 2017 (has links)
O presente estudo é parte do Projeto Enurese, um estudo multidisciplinar conduzido no ICr - HCFMUSP, no Departamento de Fisioterapia Fonoaudiologia e Terapia ocupacional USP e no Instituto de Psicologia USP, CAPPesq nº.0649/10 e FAPESP nº. 2011/17589-1; que teve como objetivo geral avaliar a resposta terapêutica de pacientes com enurese noturna monossintomática (ENM) de 6 a 16 anos a três diferentes modalidades de tratamento: alarme, desmopressina; tratamento combinado de DDAVP+alarme; O presente trabalho tem como objetivo geral avaliar, pré e pós intervenção, os escores de problemas de comportamento, avaliados pelo questionário CBCL/6-18, e dos índices de qualidade de vida, avaliados pelo PedsQL (TM) 4.0. A coorte é composta por cinquenta e nove (59) crianças e adolescentes de 6 a 16 anos, que foram randomizados aos três grupos terapêuticos: vinte e um (21) participantes receberam o tratamento conjunto de alarme com o medicamento desmopressina (DDAVP), vinte (20) participantes receberam o tratamento apenas com o alarme e dezoito (18) receberam o tratamento apenas com desmopressina. Todos os indivíduos participaram do mesmo procedimento inicial, ou seja, triagem médica, e preenchimento dos instrumentos necessários (CBCL/6-18; PedsQL (TM) 4.0 e Termo de Consentimento Livre e Esclarecido); ao fim do tratamento, os participantes preencheram novamente o CBCL/6-18 e PedsQL(TM) 4.0, O cálculo do poder estatístico foi de (1-beta) = 0,967 com probabilidade de erro a (alfa) estabelecido em 0,05. A análise de dados foi realizada através do teste T de Student pareado, o teste de Wilcoxon e ANOVA: fator único em caso de variáveis não paramétricas. Para analisar correlações foi utilizado o coeficiente de correlação de Pearson por se tratarem de dados paramétricos. Os resultados demonstraram melhora da qualidade de vida e diminuição dos problemas de comportamento pós intervenção, nas três modalidades propostas, para os pacientes que responderam com sucesso às intervenções / The present study is part of the Enuresis Project, a multidisciplinary study conducted at ICr - HCFMUSP, at the Department of Physical Therapy, Speech Therapy and Occupational Therapy USP and at the Institute of Psychology USP, CAPPesq nº 0649/10 and FAPESP nº. 2011 / 17589-1;which aimed to evaluate the therapeutic response of patients with monosymptomatic nocturnal enuresis (MNE ) from 6 to 16 years to three different treatment modalities: Alarm, Desmopressin(DDAVP); combined treatment DDAVP + alarm; The present study aims to evaluate, before and after intervention, the scores of behavioral problems according to the CBCL / 6-18 questionnaire and the quality of life indices assessed by PedsQL (TM) 4.0. The cohort is composed of fifty-nine (59) children and adolescents aged 6 to 16 years, who were randomized to the three therapeutic groups: twenty-one (21) participants received the combined alarm treatment with the drug desmopressin (DDAVP), twenty (20) participants received the treatment only with the alarm and eighteen (18) were treated with desmopressin alone. All subjects participated in the same initial procedure, ie, medical screening, and filling in the necessary instruments (CBCL / 6-18, PedsQL (TM) 4.0 after Informed Consent Form signature. At the end of the treatment, participants completed again the CBCL / 6-18 and PedsQL (TM) 4.0 questionnaires. The statistical power calculation was (1-beta) = 0.967 with probability of error ? (alpha) set at 0.05. The data analysis was performed by paired Student\'s t test, the Wilcoxon test and ANOVA: single factor in case of non-parametric variables. Pearson\'s correlation coefficient was used to analyze correlations as they were parametric data. The results showed an improvement in the quality of life and a reduction in post-intervention behavior problems in the three proposed therapeutic modalities , for the patients who responded successfully to the interventions
22

Estudo do perfil dos problemas de comportamento e dos índices de qualidade de vida numa coorte pediátrica de enurese monossintomatica / Study of the profile of behavioral problems and quality of life indices in a pediatric cohort of monosymptomatic enuresis

Guilherme Jorge Sousa e Silva 08 November 2017 (has links)
O presente estudo é parte do Projeto Enurese, um estudo multidisciplinar conduzido no ICr - HCFMUSP, no Departamento de Fisioterapia Fonoaudiologia e Terapia ocupacional USP e no Instituto de Psicologia USP, CAPPesq nº.0649/10 e FAPESP nº. 2011/17589-1; que teve como objetivo geral avaliar a resposta terapêutica de pacientes com enurese noturna monossintomática (ENM) de 6 a 16 anos a três diferentes modalidades de tratamento: alarme, desmopressina; tratamento combinado de DDAVP+alarme; O presente trabalho tem como objetivo geral avaliar, pré e pós intervenção, os escores de problemas de comportamento, avaliados pelo questionário CBCL/6-18, e dos índices de qualidade de vida, avaliados pelo PedsQL (TM) 4.0. A coorte é composta por cinquenta e nove (59) crianças e adolescentes de 6 a 16 anos, que foram randomizados aos três grupos terapêuticos: vinte e um (21) participantes receberam o tratamento conjunto de alarme com o medicamento desmopressina (DDAVP), vinte (20) participantes receberam o tratamento apenas com o alarme e dezoito (18) receberam o tratamento apenas com desmopressina. Todos os indivíduos participaram do mesmo procedimento inicial, ou seja, triagem médica, e preenchimento dos instrumentos necessários (CBCL/6-18; PedsQL (TM) 4.0 e Termo de Consentimento Livre e Esclarecido); ao fim do tratamento, os participantes preencheram novamente o CBCL/6-18 e PedsQL(TM) 4.0, O cálculo do poder estatístico foi de (1-beta) = 0,967 com probabilidade de erro a (alfa) estabelecido em 0,05. A análise de dados foi realizada através do teste T de Student pareado, o teste de Wilcoxon e ANOVA: fator único em caso de variáveis não paramétricas. Para analisar correlações foi utilizado o coeficiente de correlação de Pearson por se tratarem de dados paramétricos. Os resultados demonstraram melhora da qualidade de vida e diminuição dos problemas de comportamento pós intervenção, nas três modalidades propostas, para os pacientes que responderam com sucesso às intervenções / The present study is part of the Enuresis Project, a multidisciplinary study conducted at ICr - HCFMUSP, at the Department of Physical Therapy, Speech Therapy and Occupational Therapy USP and at the Institute of Psychology USP, CAPPesq nº 0649/10 and FAPESP nº. 2011 / 17589-1;which aimed to evaluate the therapeutic response of patients with monosymptomatic nocturnal enuresis (MNE ) from 6 to 16 years to three different treatment modalities: Alarm, Desmopressin(DDAVP); combined treatment DDAVP + alarm; The present study aims to evaluate, before and after intervention, the scores of behavioral problems according to the CBCL / 6-18 questionnaire and the quality of life indices assessed by PedsQL (TM) 4.0. The cohort is composed of fifty-nine (59) children and adolescents aged 6 to 16 years, who were randomized to the three therapeutic groups: twenty-one (21) participants received the combined alarm treatment with the drug desmopressin (DDAVP), twenty (20) participants received the treatment only with the alarm and eighteen (18) were treated with desmopressin alone. All subjects participated in the same initial procedure, ie, medical screening, and filling in the necessary instruments (CBCL / 6-18, PedsQL (TM) 4.0 after Informed Consent Form signature. At the end of the treatment, participants completed again the CBCL / 6-18 and PedsQL (TM) 4.0 questionnaires. The statistical power calculation was (1-beta) = 0.967 with probability of error ? (alpha) set at 0.05. The data analysis was performed by paired Student\'s t test, the Wilcoxon test and ANOVA: single factor in case of non-parametric variables. Pearson\'s correlation coefficient was used to analyze correlations as they were parametric data. The results showed an improvement in the quality of life and a reduction in post-intervention behavior problems in the three proposed therapeutic modalities , for the patients who responded successfully to the interventions
23

Autosomal Dominant Neurohypophyseal Diabetes Insipidus in Two Families: Molecular Analysis of the Vasopressin-Neurophysin II Gene and Functional Studies of Three Missense Mutations

Hedrich, Christian Michael, Zachurzok-Buczynska, Agnieszka, Gawlik, Aneta, Russ, Susanne, Hahn, Gabriele, Köhler, Katrin, Malecka-Tendera, Ewa, Hübner, Angela January 2009 (has links)
Background: Autosomal dominant familial neurohypophyseal diabetes insipidus (adFNDI) is a rare disease with symptoms of polydipsia, polyuria and dehydration caused by arginine vasopressin deficiency. Disease onset is within infancy or adolescence. A variety of disease-causing mutations of the arginine vasopressin neurophysin II gene (AVP) on chromosome 20p13 have been described. Methods: Two Polish families with adFNDI were screened for mutations. Processing of wild-type (WT) and mutant AVP was monitored using immunocytochemical methods in stably transfected Neuro2A cells. AVP secretion into the cell culture supernatant was investigated with an enzyme immunoassay. Results: In the first family a heterozygous p.G96D mutation was identified. Some patients additionally carried a novel heterozygous mutation p.A159T. The second family presented with a heterozygous mutation p.C98G. Confocal laser microscopy unveiled accumulation of p.G96D and p.C98G prohormones in the cellular bodies, whereas WT and p.A159T prohormones and/or processed products were located in the tips of cellular processes. Reduced levels of AVP in supernatant culture medium of p.G96D and p.C98G transfected cells in comparison to p.A159T and WT cells were found. Conclusions: We conclude that the p.G96D and p.C98G mutations cause adFNDI in the two reported families. The sequence variant p.A159T does not seem to have disease-causing effects. / Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
24

Efeitos hemodinâmicos e metabólicos da terlipressina ou naloxona na ressuscitação cardiopulmonar: estudo experimental, randomizado e controlado / Hemodynamic and metabolic effects of terlipressin or naloxone in cardiopulmonary resuscitation: an experimental, randomized and controlled trial

Martins, Herlon Saraiva 30 November 2011 (has links)
Introdução: O prognóstico da parada cardiorrespiratória (PCR) em ritmo não chocável (assistolia/atividade elétrica sem pulso) é ruim e não melhorou significativamente nas últimas décadas. Embora a epinefrina seja o vasopressor recomendado, há evidências de que ela eleva o consumo de oxigênio, reduz a pressão de perfusão subendocárdica, causa grave disfunção miocárdica e piora a microcirculação cerebral durante a ressuscitação cardiopulmonar. Vasopressina foi muito estudada nos últimos anos e não se mostrou superior à epinefrina. Naloxona e terlipressina têm sido cogitadas como potenciais vasopressores no tratamento da PCR, entretanto há poucos estudos publicados e os resultados são controversos e inconclusivos. Objetivos: Avaliar os efeitos hemodinâmicos e metabólicos da terlipressina ou naloxona na PCR induzida por hipóxia e compará-las com o tratamento-padrão (epinefrina ou vasopressina). Métodos: Estudo experimental, randomizado, cego e controlado. Ratos Wistar adultos, machos, foram anestesiados, submetidos a traqueostomia e ventilados mecanicamente. A PCR foi induzida por obstrução da traqueia e mantida por 3,5 minutos. Em seguida, os animais foram ressuscitados de forma padronizada e randomizados em um dos grupos: placebo (n = 7), vasopressina (n = 7), epinefrina (n = 7), naloxona (n = 7) ou terlipressina (n = 21). Variáveis hemodinâmicas foram monitorizadas durante todo o experimento (via cateter intra-arterial e intraventricular) e mensuradas na base, no 10o (T10), 20o (T20), 30o (T30), 45o (T45) e 60o (T60) minutos pós-PCR. Amostras de sangue arterial foram coletadas para gasometria, hemoglobina, bioquímica e lactato em quatro momentos [base, 11o (T11), 31o (T31), e 59o (T59) minutos pós-PCR]. Resultados: Os grupos foram homogêneos e não houve diferença significativa entre eles nas variáveis de base. O retorno da circulação espontânea ocorreu em 57% dos animais no grupo placebo (4 de 7) e 100% nos demais grupos (p = 0,002). A ! sobrevida em 1 hora foi de 57% no grupo placebo, 71,4% no grupo epinefrina, 90,5% no grupo terlipressina e de 100% nos demais grupos. Comparado com o grupo epinefrina, o grupo terlipressina teve maiores valores de PAM no T10 (164 vs 111 mmHg; p = 0,02), T20 (157 vs 97 mmHg; p < 0,0001), T30 (140 vs 67 mmHg; p < 0,0001), T45 (117 vs 67 mmHg; p = 0,002) e T60 (98 vs 62 mmHg; p = 0,026). O lactato arterial no grupo naloxona foi significativamente menor quando comparado ao grupo epinefrina, no T11 (5,15 vs 8,82 mmol/L), T31 (2,57 vs 5,24 mmol/L) e T59 (2,1 vs 4,1 mmol/L)[p = 0,002]. Ao longo da 1a hora pós-PCR, o grupo naloxona apresentou o melhor perfil do excesso de bases (-7,78 mmol/L) quando comparado ao grupo epinefrina (-12,78 mmol/L; p = 0,014) e ao grupo terlipressina (-11,31 mmol/L; p = 0,024). Conclusões: Neste modelo de PCR induzida por hipóxia em ratos, terlipressina e naloxona foram eficazes como vasopressores na RCP e apresentaram melhor perfil metabólico que a epinefrina. A terlipressina resultou em uma maior estabilidade hemodinâmica na 1a hora pós-PCR comparada com a epinefrina ou a vasopressina. Os efeitos metabólicos favoráveis da naloxona não são explicados pelos valores da PAM / Introduction: The prognosis of cardiac arrest (CA) with nonshockable rhythm (asystole/pulseless electrical activity) is poor and not improved significantly in recent decades. Epinephrine is the most commonly used vasopressor, although there is evidence that its use correlates with myocardial dysfunction and worsens the cerebral microcirculation. Vasopressin has been widely studied in recent years and was not superior to epinephrine. Naloxone and terlipressin have been considered as potential vasopressors in the treatment of CA, however, there are few published studies and the results are controversial and inconclusive. Objectives: To evaluate the hemodynamic and metabolic effects of terlipressin or naloxone in CA induced by hypoxia and compare with standard treatment with epinephrine or vasopressin. Methods: Experimental, randomized, blinded and controlled trial. Adult male Wistar rats were anesthetized, the proximal trachea was surgically exposed, and a 14-gauge cannula was inserted 10 mm into the trachea to the larynx. They were mechanically ventilated and monitored. The CA was induced by tracheal obstruction and maintained for 3.5 minutes. Subsequently, the animals were resuscitated using standard maneuvers and randomized to one of groups: placebo (n=7), vasopressin (n=7), epinephrine (n=7), naloxone (n=7) or terlipressin (n=21). Hemodynamic variables were monitored throughout the study (intra-arterial and intra-ventricular catheter) and measured at baseline, in the 10th (T10), 20th (T20), 30th (T30), 45th (T45) and 60th (T60) minute post-cardiac arrest. Arterial blood samples were collected for hemoglobin, biochemistry, blood gases and lactate at four moments: baseline, 11th (T11), 31st (T31) and 59th (T59) minute post-cardiac arrest. Results: The groups were homogenous and there were no significant differences among them regarding the baseline variables. The return of spontaneous circulation (ROSC) occurred in 57% of the animals (4 of 7) in the placebo group and in 100% in the ! other groups (P=0.002). One-hour survival was 57% in the placebo group, 71.4% in the epinephrine group, 90.5% in the terlipressin and 100% in the naloxone group. Compared with the epinephrine group, the terlipressin groups had a significantly higher MAP at the T10 (164 x 111 mmHg; P=0.02), T20 (157 x 97 mmHg; P<0.0001), T30 (140 x 67 mmHg; P=0.0001), T45 (117 x 67 mmHg; P=0.002) and T60 (98 x 62 mmHg; P= 0.026). The blood lactate in naloxone group was significantly lower when compared to epinephrine group in the T11 (5.15 x 8.82 mmol/L), T31 (2.57 x 5.24 mmol/L) and T59 (2.1 x 4.1)[P=0.002]. Along the first hour after cardiac arrest, the naloxone group showed the best profile of base excess (- 7.78 mmol/L) when compared to epinephrine (-12.78 mmol/L, P= 0.014) and terlipressin group (-11.31 mmol/L, P=0.024). Conclusions: In this model of CA induced by hypoxia in rats, terlipressin and naloxone were effective as vasopressors in resuscitation and had better metabolic profile compared to epinephrine. Terlipressin resulted in higher hemodynamic stability in the first hour after CA and significantly better than epinephrine or vasopressin. The favorable metabolic effects of naloxone are not explained by the values of MAP
25

Efeitos hemodinâmicos e metabólicos da terlipressina ou naloxona na ressuscitação cardiopulmonar: estudo experimental, randomizado e controlado / Hemodynamic and metabolic effects of terlipressin or naloxone in cardiopulmonary resuscitation: an experimental, randomized and controlled trial

Herlon Saraiva Martins 30 November 2011 (has links)
Introdução: O prognóstico da parada cardiorrespiratória (PCR) em ritmo não chocável (assistolia/atividade elétrica sem pulso) é ruim e não melhorou significativamente nas últimas décadas. Embora a epinefrina seja o vasopressor recomendado, há evidências de que ela eleva o consumo de oxigênio, reduz a pressão de perfusão subendocárdica, causa grave disfunção miocárdica e piora a microcirculação cerebral durante a ressuscitação cardiopulmonar. Vasopressina foi muito estudada nos últimos anos e não se mostrou superior à epinefrina. Naloxona e terlipressina têm sido cogitadas como potenciais vasopressores no tratamento da PCR, entretanto há poucos estudos publicados e os resultados são controversos e inconclusivos. Objetivos: Avaliar os efeitos hemodinâmicos e metabólicos da terlipressina ou naloxona na PCR induzida por hipóxia e compará-las com o tratamento-padrão (epinefrina ou vasopressina). Métodos: Estudo experimental, randomizado, cego e controlado. Ratos Wistar adultos, machos, foram anestesiados, submetidos a traqueostomia e ventilados mecanicamente. A PCR foi induzida por obstrução da traqueia e mantida por 3,5 minutos. Em seguida, os animais foram ressuscitados de forma padronizada e randomizados em um dos grupos: placebo (n = 7), vasopressina (n = 7), epinefrina (n = 7), naloxona (n = 7) ou terlipressina (n = 21). Variáveis hemodinâmicas foram monitorizadas durante todo o experimento (via cateter intra-arterial e intraventricular) e mensuradas na base, no 10o (T10), 20o (T20), 30o (T30), 45o (T45) e 60o (T60) minutos pós-PCR. Amostras de sangue arterial foram coletadas para gasometria, hemoglobina, bioquímica e lactato em quatro momentos [base, 11o (T11), 31o (T31), e 59o (T59) minutos pós-PCR]. Resultados: Os grupos foram homogêneos e não houve diferença significativa entre eles nas variáveis de base. O retorno da circulação espontânea ocorreu em 57% dos animais no grupo placebo (4 de 7) e 100% nos demais grupos (p = 0,002). A ! sobrevida em 1 hora foi de 57% no grupo placebo, 71,4% no grupo epinefrina, 90,5% no grupo terlipressina e de 100% nos demais grupos. Comparado com o grupo epinefrina, o grupo terlipressina teve maiores valores de PAM no T10 (164 vs 111 mmHg; p = 0,02), T20 (157 vs 97 mmHg; p < 0,0001), T30 (140 vs 67 mmHg; p < 0,0001), T45 (117 vs 67 mmHg; p = 0,002) e T60 (98 vs 62 mmHg; p = 0,026). O lactato arterial no grupo naloxona foi significativamente menor quando comparado ao grupo epinefrina, no T11 (5,15 vs 8,82 mmol/L), T31 (2,57 vs 5,24 mmol/L) e T59 (2,1 vs 4,1 mmol/L)[p = 0,002]. Ao longo da 1a hora pós-PCR, o grupo naloxona apresentou o melhor perfil do excesso de bases (-7,78 mmol/L) quando comparado ao grupo epinefrina (-12,78 mmol/L; p = 0,014) e ao grupo terlipressina (-11,31 mmol/L; p = 0,024). Conclusões: Neste modelo de PCR induzida por hipóxia em ratos, terlipressina e naloxona foram eficazes como vasopressores na RCP e apresentaram melhor perfil metabólico que a epinefrina. A terlipressina resultou em uma maior estabilidade hemodinâmica na 1a hora pós-PCR comparada com a epinefrina ou a vasopressina. Os efeitos metabólicos favoráveis da naloxona não são explicados pelos valores da PAM / Introduction: The prognosis of cardiac arrest (CA) with nonshockable rhythm (asystole/pulseless electrical activity) is poor and not improved significantly in recent decades. Epinephrine is the most commonly used vasopressor, although there is evidence that its use correlates with myocardial dysfunction and worsens the cerebral microcirculation. Vasopressin has been widely studied in recent years and was not superior to epinephrine. Naloxone and terlipressin have been considered as potential vasopressors in the treatment of CA, however, there are few published studies and the results are controversial and inconclusive. Objectives: To evaluate the hemodynamic and metabolic effects of terlipressin or naloxone in CA induced by hypoxia and compare with standard treatment with epinephrine or vasopressin. Methods: Experimental, randomized, blinded and controlled trial. Adult male Wistar rats were anesthetized, the proximal trachea was surgically exposed, and a 14-gauge cannula was inserted 10 mm into the trachea to the larynx. They were mechanically ventilated and monitored. The CA was induced by tracheal obstruction and maintained for 3.5 minutes. Subsequently, the animals were resuscitated using standard maneuvers and randomized to one of groups: placebo (n=7), vasopressin (n=7), epinephrine (n=7), naloxone (n=7) or terlipressin (n=21). Hemodynamic variables were monitored throughout the study (intra-arterial and intra-ventricular catheter) and measured at baseline, in the 10th (T10), 20th (T20), 30th (T30), 45th (T45) and 60th (T60) minute post-cardiac arrest. Arterial blood samples were collected for hemoglobin, biochemistry, blood gases and lactate at four moments: baseline, 11th (T11), 31st (T31) and 59th (T59) minute post-cardiac arrest. Results: The groups were homogenous and there were no significant differences among them regarding the baseline variables. The return of spontaneous circulation (ROSC) occurred in 57% of the animals (4 of 7) in the placebo group and in 100% in the ! other groups (P=0.002). One-hour survival was 57% in the placebo group, 71.4% in the epinephrine group, 90.5% in the terlipressin and 100% in the naloxone group. Compared with the epinephrine group, the terlipressin groups had a significantly higher MAP at the T10 (164 x 111 mmHg; P=0.02), T20 (157 x 97 mmHg; P<0.0001), T30 (140 x 67 mmHg; P=0.0001), T45 (117 x 67 mmHg; P=0.002) and T60 (98 x 62 mmHg; P= 0.026). The blood lactate in naloxone group was significantly lower when compared to epinephrine group in the T11 (5.15 x 8.82 mmol/L), T31 (2.57 x 5.24 mmol/L) and T59 (2.1 x 4.1)[P=0.002]. Along the first hour after cardiac arrest, the naloxone group showed the best profile of base excess (- 7.78 mmol/L) when compared to epinephrine (-12.78 mmol/L, P= 0.014) and terlipressin group (-11.31 mmol/L, P=0.024). Conclusions: In this model of CA induced by hypoxia in rats, terlipressin and naloxone were effective as vasopressors in resuscitation and had better metabolic profile compared to epinephrine. Terlipressin resulted in higher hemodynamic stability in the first hour after CA and significantly better than epinephrine or vasopressin. The favorable metabolic effects of naloxone are not explained by the values of MAP
26

Conception et synthèse de sondes fluorescentes et d'agonistes des récepteurs de la vasopressine et de l'ocytocine : application mécanistique et thérapeutique / Design, synthesis and pharmacological evaluation of fluorescent probes and non-peptide agonists for oxytocin and vasopressin receptors : therapeutic and mechanistic applications

Pflimlin, Elsa 31 October 2013 (has links)
Les récepteurs couplés aux protéines G constituent la plus grande famille de protéines membranaires et interviennent dans de nombreux processus physiologiques. La compréhension de l’interaction ligand-récepteur d’un point de vue mécanistique mais également thérapeutique est cruciale. Appartenant à la famille des récepteurs couplés aux protéines G, les récepteurs de la vasopressine et de l’ocytocine ont été choisis comme modèle d’étude. Ces hormones jouent un rôle important dans la modulation de l’attachement et de l’affect chez les mammifères. Afin d’accélérer la découverte de ligands ocytocinergiques et d’explorer les mécanismes fondamentaux de leurs interactions, nous avons conçu les premiers ligands fluorescents non peptidiques des récepteurs de la vasopressine V1a et de l’ocytocine. Ces ligands ont été utilisés pour développer des tests de liaisons par TR-FRET et démontrer la dimérisation des récepteurs de la vasopressine V1a et V2 sur cellules. Des études autour de petites plates-formes dérivées d’aza-dicétopipérazine ont permis d’accéder à un nouvel antagoniste non peptidique du récepteur de l’ocytocine. L’optimisation de dérivés benzodiazépines ocytocinergiques par des études de relations structure-activité a permis d’identifier les meilleurs agonistes non peptidiques du récepteur de l’ocytocine à ce jour. Une étude in vivo chez la souris et chez le singe est amorcée pour apporter dans un futur, une solution thérapeutique aux problèmes d’interaction sociale en général et d’autisme en particulier. / G protein coupled receptors are the largest membrane protein family and play an important role in a large number ofphysiological processes. The comprehension of the ligand-receptor interaction from a mechanistic point of view but alsofor therapeutic use is crucial. Belonging to the G protein coupled receptors, the oxytocin and vasopressin receptors havebeen used as a model system. These two hormones play an important role in the modulation of attachment and affectin mammals. To accelerate the discovery of new ligands for oxytocin and vasopressin receptors and to explore thefundamental role of their interactions, we designed the first non-peptide fluorescent ligands for oxytocin and vasopressin V1a receptors. These ligands have been used to develop new binding tests based on TR-FRET technology and to prove the V1a and V2 receptor dimerisation. In parallel, we developed a new non-peptide oxytocin antagonist around an aza-diketopiperazine platform. . Optimization of benzodiazepine derivatives enables us to identify the best non peptideoxytocin agonists to date. In vivo studies in mice and monkeys are initiated to bring in the future a therapeuticsolution to social interaction problems in general and autism in particular

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