Abstract
Chronic inflammation associated with obesity plays a major role in the development of metabolic diseases, cancer, and autoimmune diseases. Among Th subsets, Th17 cells are involved in the pathogenesis of autoimmune disorders such as psoriasis, rheumatoid arthritis, inflammatory bowel disease, steroid-resistant asthma, and multiple sclerosis. Accumulating data suggest that reciprocal interactions between the metabolic systems and immune system play pivotal roles in the pathogenesis of obesity-associated diseases. We herein outline the developing principles in the control of T cell differentiation and function via their cellular metabolism. Also discussed are recent findings that changes in the intracellular metabolism, including fatty acid metabolism, affect the Th17 cell function in obese individuals. Finally, we will also highlight the unique molecular mechanism involved in the activation of retinoid-related orphan receptor-gamma-t (RORγt) by intracellular metabolism and discuss a new therapeutic approach for treating autoimmune disorders through the inhibition of RORγt.
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Abbreviations
- RORγt:
-
Retinoid-related orphan receptor-gamma-t
- Th:
-
Helper T cell
- ATMs:
-
Adipose tissue macrophages
- VAT:
-
Visceral adipose tissue
- SAT:
-
Subcutaneous adipose tissue
- ILC2s:
-
Group 2 innate lymphoid cells
- MS:
-
Multiple sclerosis, psoriasis
- IBD:
-
Inflammatory bowel disease
- RA:
-
Rheumatoid arthritis
- MMPs:
-
Matrix metalloproteases
- SVCs:
-
Stromal vascular cells
- DTR:
-
Diphtheria toxin receptor
- MSC:
-
Mesenchymal stem cell
- CNS:
-
Central nervous system
- GWAS:
-
Genome-wide association study
- OXPHOS:
-
Oxidative phosphorylation
- STAT:
-
Transcription factor signal transducer and activator
- BATF:
-
Basic leucine zipper transcription factor ATF-like
- IRF:
-
Interferon-regulatory factor
- SREBP:
-
Sterol regulatory element-binding protein
- ERRα:
-
Estrogen related receptor-alpha
- LXR:
-
Liver X receptor
- FAO:
-
Fatty acid oxidation
- SRC-1:
-
Steroid receptor coactivator 1 (SRC-1)
- Dig (dhd):
-
20,22-Dihydrodigoxin-21,23-diol
- Dig (sal):
-
Digoxin-21-salicylidene
- ChIP:
-
Chromatin immunoprecipitation
- CBIs:
-
Cholesterol biosynthetic intermediates
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Acknowledgments
This work was supported by the Global COE Program (Global Center for Education and Research in Immune System Regulation and Treatment), and by grants from the Ministry of Education, Culture, Sports, Science and Technology (MEXT Japan) (Grants-in-Aid: for Scientific Research (S) #26221305, (B) #21390147 and #26293165, Young Scientists [A] #16H06224, and (B) #24790461, Challenging Exploratory Research #26670362 and #23659240, Grant-in-Aid for Scientific Research on Innovative Areas #16H01352, and Scientific Research on Innovative Areas ‘Stem Cell Aging’ #26115009), the Ministry of Health, Labor and Welfare, The Astellas Foundation for Research on Metabolic Disorders, The Uehara Memorial Foundation, Osaka Foundation for Promotion of Fundamental Medical Research, Kanae Foundation for the Promotion of Medical Science, Princes Takamatsu Cancer Research Fund and Takeda Science Foundation.
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Endo, Y., Yokote, K. & Nakayama, T. The obesity-related pathology and Th17 cells. Cell. Mol. Life Sci. 74, 1231–1245 (2017). https://doi.org/10.1007/s00018-016-2399-3
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DOI: https://doi.org/10.1007/s00018-016-2399-3