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NAFLD can transition into non-alcoholic steatohepatitis (NASH), with liver cell injury, inflammation, and an increased risk of fibrosis. We previously found that injections of either 1866, a synthetic ligand for the lectin receptor CD209, or DANA, a sialidase inhibitor, can inhibit inflammation and fibrosis in multiple animal models. The methionine and choline-deficient (MCD) diet is a model of NASH which results in the rapid induction of liver steatosis and inflammation. In this report, we show that for C57BL\/6 mice on a MCD diet, injections of both 1866 and DANA reversed MCD diet-induced decreases in white fat, decreases in adipocyte size, and white fat inflammation. However, these effects were not observed in type 2 diabetic<jats:italic>db\/db<\/jats:italic>mice on a MCD diet. In<jats:italic>db\/db<\/jats:italic>mice on a MCD diet, 1866 decreased liver steatosis, but these effects were not observed in C57BL\/6 mice. There was no correlation between the ability of 1866 or DANA to affect steatosis and the effects of these compounds on the density of liver macrophage cells expressing CLEC4F, CD64, F4\/80, or Mac2. Together these results indicate that 1866 and DANA modulate adipocyte size and adipose tissue macrophage populations, that 1866 could be useful for modulating steatosis, and that changes in the local density of 4 different liver macrophages cell types do not correlate with effects on liver steatosis.<\/jats:p>","DOI":"10.1371\/journal.pone.0244762","type":"journal-article","created":{"date-parts":[[2020,12,30]],"date-time":"2020-12-30T19:36:40Z","timestamp":1609357000000},"page":"e0244762","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":11,"title":["A CD209 ligand and a sialidase inhibitor differentially modulate adipose tissue and liver macrophage populations and steatosis in mice on the Methionine and Choline-Deficient (MCD) diet"],"prefix":"10.1371","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7413-2773","authenticated-orcid":true,"given":"Darrell","family":"Pilling","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9241-8003","authenticated-orcid":true,"given":"Tejas R.","family":"Karhadkar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2361-4307","authenticated-orcid":true,"given":"Richard H.","family":"Gomer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"340","published-online":{"date-parts":[[2020,12,30]]},"reference":[{"issue":"1","key":"pone.0244762.ref001","doi-asserted-by":"crossref","first-page":"328","DOI":"10.1002\/hep.29367","article-title":"The diagnosis and management of nonalcoholic fatty liver disease: Practice guidance from the American Association 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