Leptin deficiency impairs maturation of dendritic cells and enhances induction of regulatory T and Th17 cells

Date
2014-03-01Author
Moraes-Vieira, Pedro M. M.
Larocca, Rafael A.
Bassi, Enio J.
Peron, Jean Pierre S.
Andrade-Oliveira, Vinicius
Wasinski, Frederick [UNIFESP]
Araújo, Ronaldo de Carvalho [UNIFESP]
Thornley, Thomas
Quintana, Francisco J.
Basso, Alexandre Salgado [UNIFESP]
Strom, Terry B.
Câmara, Niels Olsen Saraiva [UNIFESP]
Type
ArtigoISSN
0014-2980Is part of
European Journal of ImmunologyDOI
10.1002/eji.201343592Metadata
Show full item recordAbstract
Leptin is an adipose-secreted hormone that plays an important role in both metabolism and immunity. Leptin has been shown to induce Th1-cell polarization and inhibit Th2-cell responses. Additionally, leptin induces Th17-cell responses, inhibits regulatory T (Treg) cells and modulates autoimmune diseases. Here, we investigated whether leptin mediates its activity on T cells by influencing dendritic cells (DCs) to promote Th17 and Treg-cell immune responses in mice. We observed that leptin deficiency (i) reduced the expression of DC maturation markers, (ii) decreased DC production of IL-12, TNF-, and IL-6, (iii) increased DC production of TGF-, and (iv) limited the capacity of DCs to induce syngeneic CD4(+) T-cell proliferation. As a consequence of this unique phenotype, DCs generated under leptin-free conditions induced Treg or T(H)17 cells more efficiently than DCs generated in the presence of leptin. These data indicate important roles for leptin in DC homeostasis and the initiation and maintenance of inflammatory and regulatory immune responses by DCs.
Citation
European Journal of Immunology. Hoboken: Wiley-Blackwell, v. 44, n. 3, p. 794-806, 2014.Sponsorship
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Complex Fluids INCT
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