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At homeostasis filarial infections have expanded adaptive T regulatory but not classical Th2 cells.
- Source :
-
Journal of immunology (Baltimore, Md. : 1950) [J Immunol] 2010 May 01; Vol. 184 (9), pp. 5375-82. Date of Electronic Publication: 2010 Mar 31. - Publication Year :
- 2010
-
Abstract
- Despite the well-documented immune suppression associated with human helminth infections, studies characterizing the immune response at the single-cell level are scanty. We used multiparameter flow cytometry to characterize the type of effector (Th1, Th2, and Th17) and regulatory (natural T regulatory cells [nTregs] and adaptive Treg cells [aTreg/type 1 regulatory cells (Tr1s)]) CD4(+) and CD8(+) T cells in filaria-infected (Fil(+)) and -uninfected (Fil(-)) individuals at homeostasis (in the absence of stimulation). Frequencies of CD4(+) lymphocytes spontaneously producing IL-4, IL-10, and IL-17A were significantly higher in Fil(+), as were those of IL-10(+)/IL-4(+) double-producing CD4(+) cells. Interestingly, frequencies of Th17 and aTreg/Tr1s but not classical Th1 or Th2 cells were significantly increased in Fil(+) compared to Fil(-) individuals. Although the frequency of nTreg was increased in Fil(+), IL-10 was overwhelmingly produced by CD4(+)CD25(-) cells. Moreover, the concentration of IL-10 produced spontaneously in vitro strongly correlated with the integrated geometric mean fluorescence intensity of IL-10-producing aTreg/Tr1s in Fil(+). Together, these data show that at steady state, IL-10-producing aTreg/Tr1 as well as nTreg and effector Th17 CD4(+) cells are expanded in vivo in human filarial infections. Moreover, we have established baseline ex vivo frequencies of effector and Tregs at homeostasis at a population level.
- Subjects :
- Animals
Cytokines biosynthesis
Enterobiasis immunology
Enterobius immunology
Humans
Hymenolepiasis immunology
Hymenolepis nana immunology
Mansonella immunology
Microfilariae immunology
T-Lymphocytes, Regulatory metabolism
T-Lymphocytes, Regulatory parasitology
Th2 Cells metabolism
Th2 Cells parasitology
Wuchereria bancrofti immunology
Adaptive Immunity
Elephantiasis, Filarial immunology
Homeostasis immunology
Mansonelliasis immunology
T-Lymphocytes, Regulatory immunology
Th2 Cells immunology
Subjects
Details
- Language :
- English
- ISSN :
- 1550-6606
- Volume :
- 184
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- Journal of immunology (Baltimore, Md. : 1950)
- Publication Type :
- Academic Journal
- Accession number :
- 20357251
- Full Text :
- https://doi.org/10.4049/jimmunol.0904067