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Functional Heterogeneity of CD11c-positive Adipose Tissue Macrophages in Diet-induced Obese Mice
- Source :
- Journal of Biological Chemistry. 285:15333-15345
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- Obesity represents a state of chronic, low grade inflammation and is associated with infiltration of increased numbers of adipose tissue macrophages (ATMs). Diet-induced obesity leads to an increase in non-inflammatory M1-like ATMs displaying the CD11c surface marker. We assessed the function of CD11c-positive ATMs when insulin resistant high fat diet (HFD) mice become insulin-sensitive after switching from HFD to normal chow (NC). HFD mice rapidly become insulin-sensitive in all major insulin-target tissues, including muscle, liver, and adipose tissue, after the diet switch. In adipose tissue the CD11c-positive macrophages remain constant in number despite the presence of insulin sensitivity, but these macrophages now assume a new phenotype in which they no longer exhibit increased inflammatory pathway markers. Adipose tissue markers of apoptosis and necrosis were elevated on HFD and remain high after the HFD → NC diet switch. Furthermore, ATM accumulation preceded detectable adipocyte necrosis at the early phase of HFD. Together, these results indicate that 1) CD11c-positive M1-like ATMs can exhibit phenotypic plasticity and that the polarization of these cells between inflammatory and non-inflammatory states is well correlated to the presence of absence of insulin resistance, and 2) adipocyte necrosis and apoptosis can be dissociated from ATM accumulation.
- Subjects :
- Male
medicine.medical_specialty
Necrosis
Adipose tissue macrophages
Adipose tissue
CD11c
Apoptosis
Inflammation
Biology
Polymerase Chain Reaction
Biochemistry
Mice
chemistry.chemical_compound
Insulin resistance
Adipocyte
Internal medicine
medicine
Animals
Obesity
Molecular Biology
DNA Primers
Base Sequence
Macrophages
food and beverages
Cell Biology
medicine.disease
Immunohistochemistry
CD11c Antigen
Diet
Mice, Inbred C57BL
Glucose
Metabolism
Endocrinology
Adipose Tissue
chemistry
Insulin Resistance
medicine.symptom
Diet-induced obese
Subjects
Details
- ISSN :
- 00219258
- Volume :
- 285
- Database :
- OpenAIRE
- Journal :
- Journal of Biological Chemistry
- Accession number :
- edsair.doi.dedup.....08565ce76650b8a5c3ba9e180b100f9a
- Full Text :
- https://doi.org/10.1074/jbc.m110.100263