CHICAGO \u2014 Northwestern Medicine scientists identified a link between Huntington\u2019s disease and dysfunction of the subthalamic nucleus, a component of the basal ganglia, a group of brain structures critical for movement and impulse control.<\/p>\n
Huntington\u2019s disease is characterized by the progressive loss of nerve cells in the brain and affects approximately 1 in 10,000 people. This fatal disorder is caused by a hereditary defect in a single gene. <\/p>\n
\u201cAlthough the genetic basis of the disease is well established, why the mutation leads to the expression of symptoms and loss of brain tissue remains poorly understood,\u201d explained senior author Mark Bevan, professor of physiology at Northwestern University Feinberg School of Medicine.<\/p>\n
The study was published Dec. 20 in the journal eLife<\/em>. <\/p>\n The debilitating symptoms of Huntington\u2019s disease typically manifest in adulthood and involve loss of motor and cognitive function, depression and personality changes. From the point of onset, symptoms develop and intensify over the following 10 to 25 years until death, typically due to complications associated with the disease.<\/p>\n \u201cWhile research into Huntington\u2019s disease has focused on other parts of the basal ganglia, the subthalamic nucleus has been largely overlooked,\u201d said Bevan. \u201cThis is surprising because patients with Huntington\u2019s disease have fewer nerve cells in the subthalamic nucleus. People who have suffered damage to the subthalamic nucleus exhibit excessive movement and impulsive behavior, similar to patients with Huntington\u2019s disease.\u201d<\/p>\n Using mice genetically engineered to carry the Huntington\u2019s disease gene, scientists discovered the electrical activity of the subthalamic nucleus was lost. Furthermore, impaired subthalamic activity was caused by anomalous receptor signaling, leading to defective energy metabolism and accumulation of damaging oxidants. The authors also found abnormalities in the subthalamic nucleus occur earlier than in other brain regions, and that subthalamic nucleus nerve cells progressively degenerate as the mice age, mirroring the human pathology of Huntington\u2019s disease. <\/p>\n \u201cOur findings suggest early problems in the subthalamic nucleus not only contribute to the symptoms of Huntington\u2019s disease, but are also likely to impair the processing capacity and health of other brain structures, more traditionally associated with the disease,\u201d Bevan said. <\/p>\n Currently, there is no cure for Huntington\u2019s disease; treatment can only alleviate some of the symptoms. A better understanding of aberrant brain receptor signaling that leads to nerve cell dysfunction could reveal a target for therapy, according to the authors. <\/p>\n ###<\/p>\n Additional Northwestern study authors include: lead author Jeremy Atherton, Eileen McIver; Matthew Mullen; David Wokosin, and D. James Surmeier. <\/p>\n The research was funded by the CHDI Foundation and grants 2R37 NS041280 and 2P50 NS047085 from the National Institute of Neurological Disorders and Stroke of the National Institutes of Health.<\/p>\n","protected":false},"excerpt":{"rendered":" CHICAGO \u2014 Northwestern Medicine scientists identified a link between Huntington\u2019s disease and dysfunction of the subthalamic nucleus, a component of the basal ganglia, a group of brain structures critical for movement and impulse control. Huntington\u2019s disease is characterized by the progressive loss of nerve cells in the brain and affects approximately 1 in 10,000 people. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-60266","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"http:\/\/healthmedicinet.com\/news\/wp-json\/wp\/v2\/posts\/60266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/healthmedicinet.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/healthmedicinet.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/healthmedicinet.com\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/healthmedicinet.com\/news\/wp-json\/wp\/v2\/comments?post=60266"}],"version-history":[{"count":0,"href":"http:\/\/healthmedicinet.com\/news\/wp-json\/wp\/v2\/posts\/60266\/revisions"}],"wp:attachment":[{"href":"http:\/\/healthmedicinet.com\/news\/wp-json\/wp\/v2\/media?parent=60266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/healthmedicinet.com\/news\/wp-json\/wp\/v2\/categories?post=60266"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/healthmedicinet.com\/news\/wp-json\/wp\/v2\/tags?post=60266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}