RESUMO
ABSTRACT Background: Doppler-guided haemorrhoidal artery ligation with mucopexy is a minimal-invasive surgical technique. It is both effective and less painful than conventional haemorrhoidectomy. Methods: We gathered records on all patients operated on between November 2012 and June 2014. Pre- and postoperative scores were calculated during consultation and then by phone. Unsuccessful surgical treatment was defined by persistent haemorrhoid symptoms within three months following the procedure and relapse defined by recurrent symptoms after the third postoperative month. Results: During the period analysed, 70 patients underwent consecutive surgical procedures for haemorrhoid prolapse (52%), bleeding (29%), or both (17%). Hospitalisation was outpatient or overnight for 87% of patients. There were no complications in 92.7% of cases. The average period away from work was 11 days (± 6.5). The time between the procedure and last postoperative consultation, followed by telephone contact, was respectively 2.7 months (± 5.8) and 16.5 months (± 4.9). At the time of the postoperative telephone call, the Thaha et al. score decreased by 5.6 (p < 0.001), while the quality of life score decreased by 2 (p < 0.001). The Wexner score remained the same or improved for all patients except one. Treatment was unsuccessful for 6/67 patients (9%) and 10/61 patients (16.4%) experienced a subsequent recurrence in haemorrhoid symptoms. Only those over 51 years old were statistically associated with more frequent recurrences (p = 0.044). Conclusion: Doppler-guided haemorrhoidal artery ligation with mucopexy is an effective technique in the medium-term. Good tolerance in makes this treatment an attractive alternative to conventional haemorrhoidectomy.
RESUMO Experiência: A ligação de artéria hemorroidária com mucopexia orientada por Doppler é técnica cirúrgica minimamente invasiva. Esse procedimento é efetivo e menos doloroso do que a hemorroidectomia convencional. Métodos: Reunimos os prontuários de todos os pacientes operados entre novembro de 2012 e junho de 2014. Foram calculados escores pré-operatórios e pós-operatórios durante as consultas e, em seguida, por telefone. Tratamento cirúrgico malsucedido foi definido como a persistência dos sintomas de hemorroidas dentro de três meses após o procedimento, e recidiva foi definida por sintomas recorrentes depois do terceiro mês do pós-operatório. Resultados: Durante o período analisado, 70 pacientes passaram por procedimentos cirúrgicos consecutivos para prolapso de hemorroida (52%), sangramento (29%), ou ambos (17%). Para 87% dos pacientes, a hospitalização foi ambulatorial ou de pernoite. Não ocorreram complicações em 92,7% dos casos. O período médio de absenteísmo foi de 11 ± 6,5 dias. Os tempos transcorridos entre o procedimento e a última consulta no pós-operatório, seguida pelo contato telefônico, foram de respectivamente 2,7 ± 5,8 meses e 16,5 ± 4,9 meses. Por ocasião do contato telefônico no pós-operatório, o escore de Thaha et al. diminuiu em 5,6 pontos (p < 0,001), enquanto o escore de qualidade de vida diminuiu em 2 pontos (p < 0,001). O escore de Wexner permaneceu igual ou melhorou para todos os pacientes, exceto um. O tratamento não obteve sucesso para 6/67 pacientes (9%); e 10/61 pacientes (16,4%) sofreram uma subsequente recorrência nos sintomas hemorroidários. Apenas aqueles participantes com mais de 51 anos demonstraram associação estatística com recorrências mais frequentes (p = 0,044). Conclusão: A ligação de artéria hemorroidária com mucopexia orientada por Doppler é técnica efetiva no meio termo. A boa tolerância faz com que esse tratamento seja uma alternativa efetiva à hemorroidectomia convencional.
Assuntos
Humanos , Masculino , Feminino , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Hemorroidas/cirurgia , Ligadura/métodos , Período Pós-Operatório , Recidiva , Estudos de Coortes , Ultrassonografia Doppler , HemorroidectomiaRESUMO
Here, we investigated whether pharmacological PPARγ activation modulates key early events in brown adipose tissue (BAT) recruitment induced by acute cold exposure with the aim of unraveling the interrelationships between sympathetic and PPARγ signaling. Sprague-Dawley rats treated or not with the PPARγ ligand rosiglitazone (15 mg·kg(-1)·day(-1), 7 days) were kept at 23°C or exposed to cold (5°C) for 24 h and evaluated for BAT gene expression, sympathetic activity, thyroid status, and adrenergic signaling. Rosiglitazone did not affect the reduction in body weight gain and the increase in feed efficiency, Vo(2), and BAT sympathetic activity induced by 24-h cold exposure. Rosiglitazone strongly attenuated the increase in serum total and free T4 and T3 levels and BAT iodothyronine deiodinase type 2 (D2) and PGC-1α mRNA levels and potentiated the reduction in BAT thyroid hormone receptor (THR) ß mRNA levels induced by cold. Administration of T3 to rosiglitazone-treated rats exacerbated the cold-induced increase in energy expenditure but did not restore a proper activation of D2 and PGC-1α, nor further increased uncoupling protein 1 expression. Regarding adrenergic signaling, rosiglitazone did not affect the changes in BAT cAMP content and PKA activity induced by cold. Rosiglitazone alone or in combination with cold increased CREB binding to DNA, but it markedly reduced the expression of one of its major coactivators, CREB binding protein. In conclusion, pharmacological PPARγ activation impairs short-term cold elicitation of BAT adrenergic and thyroid signaling, which may result in abnormal tissue recruitment and thermogenic activity.
Assuntos
Tecido Adiposo Marrom/metabolismo , Temperatura Baixa , Iodeto Peroxidase/metabolismo , PPAR gama/metabolismo , Proteínas de Ligação a RNA/metabolismo , Glândula Tireoide/fisiologia , Fatores de Transcrição/metabolismo , Regulação para Cima/fisiologia , Animais , Masculino , Modelos Animais , PPAR gama/agonistas , PPAR gama/efeitos dos fármacos , Coativador 1-alfa do Receptor gama Ativado por Proliferador de Peroxissomo , Ratos , Ratos Sprague-Dawley , Rosiglitazona , Transdução de Sinais/efeitos dos fármacos , Transdução de Sinais/fisiologia , Tiazolidinedionas/farmacologia , Tiroxina/sangue , Fatores de Tempo , Tri-Iodotironina/sangue , Iodotironina Desiodinase Tipo IIRESUMO
Brown adipose tissue (BAT) non-shivering thermogenesis impacts energy homeostasis in rodents and humans. Mitochondrial uncoupling protein 1 in brown fat cells produces heat by dissipating the energy generated by fatty acid and glucose oxidation. In addition to thermogenesis and despite its small relative size, sympathetically activated BAT constitutes an important glucose, fatty acid, and triacylglycerol-clearing organ, and such function could potentially be used to alleviate dyslipidemias, hyperglycemia, and insulin resistance. To date, chronic sympathetic innervation and peroxisome proliferator-activated receptor (PPAR) γ activation are the only recognized inducers of BAT recruitment. Here, we review the major differences between these two BAT inducers in the regulation of lipolysis, fatty acid oxidation, lipid uptake and triacylglycerol synthesis, glucose uptake, and de novo lipogenesis. Whereas BAT recruitment through sympathetic drive translates into functional thermogenic activity, PPARγ-mediated recruitment is associated with a reduction in sympathetic activity leading to increased lipid storage in brown adipocytes. The promising therapeutic role of BAT in the treatment of hypertriglyceridemic and hyperglycemic conditions is also discussed.