RESUMEN
The Renin-Angiotensin System (RAS) is expressed in the central nervous system and has important functions that go beyond blood pressure regulation. Clinical and experimental studies have suggested that alterations in the brain RAS contribute to the development and progression of neurodegenerative diseases. However, there is limited information regarding the involvement of RAS components in Huntington's disease (HD). Herein, we used the HD murine model, (BACHD), as well as samples from patients with HD to investigate the role of both the classical and alternative axes of RAS in HD pathophysiology. BACHD mice displayed worse motor performance in different behavioral tests alongside a decrease in the levels and activity of the components of the RAS alternative axis ACE2, Ang-(1-7), and Mas receptors in the striatum, prefrontal cortex, and hippocampus. BACHD mice also displayed a significant increase in mRNA expression of the AT1 receptor, a component of the RAS classical arm, in these key brain regions. Moreover, patients with manifest HD presented higher plasma levels of Ang-(1-7). No significant changes were found in the levels of ACE, ACE2, and Ang II. Our findings provided the first evidence that an imbalance in the RAS classical and counter-regulatory arms may play a role in HD pathophysiology.
Asunto(s)
Angiotensina I , Enzima Convertidora de Angiotensina 2 , Enfermedad de Huntington , Fragmentos de Péptidos , Receptor de Angiotensina Tipo 1 , Sistema Renina-Angiotensina , Angiotensina I/genética , Angiotensina I/metabolismo , Angiotensina II/metabolismo , Enzima Convertidora de Angiotensina 2/genética , Animales , Modelos Animales de Enfermedad , Humanos , Enfermedad de Huntington/genética , Ratones , Fragmentos de Péptidos/genética , Fragmentos de Péptidos/metabolismo , Peptidil-Dipeptidasa A/metabolismo , Receptor de Angiotensina Tipo 1/genética , Receptor de Angiotensina Tipo 1/metabolismo , Sistema Renina-Angiotensina/genética , Sistema Renina-Angiotensina/fisiologíaRESUMEN
ABSTRACT Huntington's disease (HD) is an autosomal dominant neurodegenerative disease classified under the choreas. Besides motor symptoms, HD is marked by cognitive and behavioral symptoms, impacting patients' functional capacity. The progression of cognitive impairment and neuropsychiatric symptoms occur in parallel with neurodegeneration. The nature of these symptoms is very dynamic, and the major clinical challenges include executive dysfunction, apathy, depression and irritability. Herein, we provide a focused updated review on the cognitive and psychiatric features of HD.
RESUMO A doença de Huntington (DH) é uma doença neurodegenerativa autossômica dominante classificada entre as coreias. Além de sintomas motores, a DH é caracterizada por sintomas cognitivos e comportamentais que impactam na capacidade funcional dos pacientes. A progressão dos sintomas neuropsiquiátricos e déficits cognitivos ocorre paralelamente à neurodegeneração. A natureza desses sintomas é muito dinâmica, sendo que os desafios clínicos mais comuns incluem disfunção executiva, apatia, depressão e irritabilidade. O presente artigo apresenta uma revisão atualizada sobre as manifestações cognitivas e psiquiátricas da DH.
Asunto(s)
Humanos , Conducta , Enfermedad de Huntington , Cognición , NeuropsiquiatríaRESUMEN
Huntington's disease (HD) is an autosomal dominant neurodegenerative disease classified under the choreas. Besides motor symptoms, HD is marked by cognitive and behavioral symptoms, impacting patients' functional capacity. The progression of cognitive impairment and neuropsychiatric symptoms occur in parallel with neurodegeneration. The nature of these symptoms is very dynamic, and the major clinical challenges include executive dysfunction, apathy, depression and irritability. Herein, we provide a focused updated review on the cognitive and psychiatric features of HD.
A doença de Huntington (DH) é uma doença neurodegenerativa autossômica dominante classificada entre as coreias. Além de sintomas motores, a DH é caracterizada por sintomas cognitivos e comportamentais que impactam na capacidade funcional dos pacientes. A progressão dos sintomas neuropsiquiátricos e déficits cognitivos ocorre paralelamente à neurodegeneração. A natureza desses sintomas é muito dinâmica, sendo que os desafios clínicos mais comuns incluem disfunção executiva, apatia, depressão e irritabilidade. O presente artigo apresenta uma revisão atualizada sobre as manifestações cognitivas e psiquiátricas da DH.