IL-10 secreting CD21.sup.+ B cells are present in jejunal Peyer's patches of sheep during fetal development

We recently reported a novel interleukin-10 (IL-10)-secreting CD21.sup.+ B cell population in jejunal Peyer's patches (JPP) of sheep with a regulatory function (B.sub.regs) suppressing Toll-like receptor 9 (TLR9)-induced cytokine responses. However, little is known about the development of thes...

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Published in:Cell and tissue research 2014-05, Vol.356 (2), p.417
Main Authors: Mutwiri, G, Babiuk, L, Griebel, P. J, Jimbo, S
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Language:English
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B cells
Ethylenediaminetetraacetic acid
Fetus
Growth
Immunity
Interferon
Interleukins
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Babiuk, L
Griebel, P. J
Jimbo, S
description We recently reported a novel interleukin-10 (IL-10)-secreting CD21.sup.+ B cell population in jejunal Peyer's patches (JPP) of sheep with a regulatory function (B.sub.regs) suppressing Toll-like receptor 9 (TLR9)-induced cytokine responses. However, little is known about the development of these cells. Therefore, we investigate their existence in JPP cells from fetal and newborn lambs. CD21.sup.+ B cells were purified from JPP cells by magnetic cell sorting and subsequently stimulated with the TLR9 agonist, CpG ODN (CpG oligodeoxynucleotide). Lymphocyte proliferative responses, cytokine production (IL-10, IL-12 and interferon-[gamma] [INF-[gamma]]) and antibody secretion were assayed. We found that fetal and neonatal CD21.sup.+ B cells spontaneously secreted high levels of IL-10 regardless of CpG stimulation but that these cells did not produce any IL-12 or INF-[gamma] upon stimulation with CpG. The observed responses are consistent with those previously reported for B.sub.regs characterized in JPP of older lambs. Surprisingly, unlike in older lambs, fetal and neonatal JPP CD21.sup.+ B cells proliferated in response to CpG stimulation. Our investigations of fetal and neonatal lambs provide evidence for the development of IL-10-secreting CD21.sup.+ B cells in PPs prior to antigen exposure.
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J ; Jimbo, S</creator><creatorcontrib>Mutwiri, G ; Babiuk, L ; Griebel, P. J ; Jimbo, S</creatorcontrib><description>We recently reported a novel interleukin-10 (IL-10)-secreting CD21.sup.+ B cell population in jejunal Peyer's patches (JPP) of sheep with a regulatory function (B.sub.regs) suppressing Toll-like receptor 9 (TLR9)-induced cytokine responses. However, little is known about the development of these cells. Therefore, we investigate their existence in JPP cells from fetal and newborn lambs. CD21.sup.+ B cells were purified from JPP cells by magnetic cell sorting and subsequently stimulated with the TLR9 agonist, CpG ODN (CpG oligodeoxynucleotide). Lymphocyte proliferative responses, cytokine production (IL-10, IL-12 and interferon-[gamma] [INF-[gamma]]) and antibody secretion were assayed. We found that fetal and neonatal CD21.sup.+ B cells spontaneously secreted high levels of IL-10 regardless of CpG stimulation but that these cells did not produce any IL-12 or INF-[gamma] upon stimulation with CpG. The observed responses are consistent with those previously reported for B.sub.regs characterized in JPP of older lambs. Surprisingly, unlike in older lambs, fetal and neonatal JPP CD21.sup.+ B cells proliferated in response to CpG stimulation. 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Therefore, we investigate their existence in JPP cells from fetal and newborn lambs. CD21.sup.+ B cells were purified from JPP cells by magnetic cell sorting and subsequently stimulated with the TLR9 agonist, CpG ODN (CpG oligodeoxynucleotide). Lymphocyte proliferative responses, cytokine production (IL-10, IL-12 and interferon-[gamma] [INF-[gamma]]) and antibody secretion were assayed. We found that fetal and neonatal CD21.sup.+ B cells spontaneously secreted high levels of IL-10 regardless of CpG stimulation but that these cells did not produce any IL-12 or INF-[gamma] upon stimulation with CpG. The observed responses are consistent with those previously reported for B.sub.regs characterized in JPP of older lambs. Surprisingly, unlike in older lambs, fetal and neonatal JPP CD21.sup.+ B cells proliferated in response to CpG stimulation. 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subjects B cells
Ethylenediaminetetraacetic acid
Fetus
Growth
Immunity
Interferon
Interleukins
title IL-10 secreting CD21.sup.+ B cells are present in jejunal Peyer's patches of sheep during fetal development
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