Journal
ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY
Volume 306, Issue 5, Pages 1011-1030Publisher
WILEY
DOI: 10.1002/ar.25039
Keywords
autofluorescence; fatty liver; flow cytometry; high fat diet; intrahepatic leukocytes
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This article describes an efficient method for isolating intrahepatic leukocytes from mice fed with high fat diet and proposes a strategy to alleviate autofluorescence during phenotyping by multicolor flow cytometry. The article also introduces a gating strategy for robust identification of different immune cell subsets. These procedures allow simultaneous processing of multiple samples and ensure reliable cell isolation and noise reduction for reliable characterization of intrahepatic leukocytes from fatty liver tissues.
Flow cytometry is an imperative tool to characterize alterations in a wide range of immune cell populations during inflammatory conditions and disease states that affect the liver such as the obesity-induced non-alcoholic fatty liver disease and liver fibrosis. Identification and quantification of immune cell subsets from the liver is critically dependent on efficient isolation of intrahepatic leukocytes. The isolation of leukocytes from fatty and fibrotic livers and processing the cells for flow cytometry can be challenging with respect to cell yields, purity and most importantly, the level of autofluorescence resulting from fat deposition. Here, we describe an efficient method for isolating intrahepatic leukocytes from mice fed with high fat diet and propose a strategy to alleviate autofluorescence during phenotyping by multicolor flowcytometry. We also describe a gating strategy for robust identification of granulocytes, pro-inflammatory, anti-inflammatory and transitional state monocyte subsets, dendritic cells, B cell, T lymphocyte subpopulations and NK cell subsets. Overall, the procedures described here will allow simultaneous processing of several samples while ensuring reproducible cell isolation and efficient noise reduction required for reliable characterization of intrahepatic leukocytes from the fatty liver tissues.
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