Inflammation & autoimmunity in human ageing: Dendritic cells take a center stage.
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Date
2013-11
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Abstract
Dendritic cells (DCs) play an important role in both immunological tolerance and immunity as well as in pro- and anti-inflammatory responses. Upon uptake of apoptotic cells and apoptotic bodies, DCs degrade self antigens from them and induce anti-inflammatory response and T regulatory (Treg) cells resulting in the maintenance of tolerance to self antigens. Ageing is characterized by progressive immunodeficiency, inflammation, and autoimmunity. In this paper we will review the role of DCs in inflammation and autoimmunity in human ageing and will highlight the observations that DCs from aged humans display impairment in their capacity to uptake apoptotic cells, and paradoxically induce proinflammatory response and increased reactivity to self antigen (DNA). DNA from aged is hypomethylated and hypomethylation is associated with increased immunogenecity of self DNA.
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Keywords
Apoptosis, cytokines, dendritic cells, DNA methylation, tolerance
Citation
Gupta Sudhir, Agrawal Anshu. Inflammation & autoimmunity in human ageing: Dendritic cells take a center stage. Indian Journal of Medical Research. 2013 Nov; 138(5): 711-716.