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While dietary supplementation of B-vitamins is a generally effective method to lower homocysteine levels, there is little if any benefit to cognition. In the context of amyloid pathology, dietary-induced HHcy is known to enhance amyloid deposition and certain inflammatory responses. Little is known, however, about whether there is a more specific effect on microglia resulting from combined amyloid and HHcy pathologies.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The present study used a knock-in mouse model of amyloidosis, aged to 12\u2009months, given 8\u2009weeks of B-vitamin deficiency-induced HHcy to better understand how microglia are affected in this comorbidity context.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>We found that HHcy-inducing diet increased amyloid plaque burden, altered the neuroinflammatory milieu, and upregulated the expression of multiple damage-associated and \u201chomeostatic\u201d microglial genes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Taken together, these data indicate complex effects of comorbid pathologies on microglial function that are not driven solely by increased amyloid burden. Given the highly dynamic nature of microglia, their central role in AD pathology, and the frequent occurrence of various comorbidities in AD patients, it is increasingly important to understand how microglia respond to mixed pathological processes.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12974-020-01938-7","type":"journal-article","created":{"date-parts":[[2020,9,17]],"date-time":"2020-09-17T11:04:06Z","timestamp":1600340646000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Microglial-associated responses to comorbid amyloid pathology and hyperhomocysteinemia in an aged knock-in mouse model of Alzheimer\u2019s disease"],"prefix":"10.1186","volume":"17","author":[{"given":"David J.","family":"Braun","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edgardo","family":"Dimayuga","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Josh M.","family":"Morganti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8139-6400","authenticated-orcid":false,"given":"Linda J.","family":"Van Eldik","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,9,17]]},"reference":[{"issue":"2","key":"1938_CR1","doi-asserted-by":"publisher","first-page":"263","DOI":"10.1093\/ajcn\/67.2.263","volume":"67","author":"O Nygard","year":"1998","unstructured":"Nygard O, Refsum H, Ueland PM, Vollset SE. 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