TY - JOUR
T1 - Hematopoietic progenitor cell regulation by CD4+CD25+ T cells
AU - Urbieta, Maite
AU - Barao, Isabel
AU - Jones, Monica
AU - Jurecic, Roland
AU - Panoskaltsis-Mortari, Angela
AU - Blazar, Bruce R.
AU - Murphy, William J.
AU - Levy, Robert B.
PY - 2010/6/10
Y1 - 2010/6/10
N2 - CD4+CD25+FoxP3+ regulatory T cells (Tregs) possess the capacity to modulate both adaptive and innate immune responses. We hypothesized that Tregs could regulate hematopoiesis based on cytokine effector molecules they can produce. The studies here demonstrate that Tregs can affect the differentiation of myeloid progenitor cells. In vitro findings demonstrated the ability of Tregs to inhibit the differentiation of interleukin-3 (IL-3)/stem cell factor (colony-forming unit [CFU]-IL3)-driven progenitor cells. Inhibitory effects were mediated by a pathway requiring cell-cell contact, major histocompatibility complex class II expression on marrow cells, and transforming growth factor-β. Importantly, depletion of Tregs in situ resulted in enhanced CFU-IL3 levels after bone marrow transplantation. Cotransplantation of CD4+ FoxP3+gfp Tregs together with bone marrow was found to diminish CFU-IL3 responses after transplantation. To address the consequence of transplanted Tregs on differentiated progeny from these CFU 2 weeks after hematopoietic stem cell transplantation, peripheral blood complete blood counts were performed and examined for polymorphonuclear leukocyte content. Recipients of cotransplanted Tregs exhibited diminished neutrophil counts. Together, these findings illustrate that both recipient and donor Tregs can influence hematopoietic progenitor cell activity after transplantation and that these cells can alter responses outside the adaptive and innate immune systems.
AB - CD4+CD25+FoxP3+ regulatory T cells (Tregs) possess the capacity to modulate both adaptive and innate immune responses. We hypothesized that Tregs could regulate hematopoiesis based on cytokine effector molecules they can produce. The studies here demonstrate that Tregs can affect the differentiation of myeloid progenitor cells. In vitro findings demonstrated the ability of Tregs to inhibit the differentiation of interleukin-3 (IL-3)/stem cell factor (colony-forming unit [CFU]-IL3)-driven progenitor cells. Inhibitory effects were mediated by a pathway requiring cell-cell contact, major histocompatibility complex class II expression on marrow cells, and transforming growth factor-β. Importantly, depletion of Tregs in situ resulted in enhanced CFU-IL3 levels after bone marrow transplantation. Cotransplantation of CD4+ FoxP3+gfp Tregs together with bone marrow was found to diminish CFU-IL3 responses after transplantation. To address the consequence of transplanted Tregs on differentiated progeny from these CFU 2 weeks after hematopoietic stem cell transplantation, peripheral blood complete blood counts were performed and examined for polymorphonuclear leukocyte content. Recipients of cotransplanted Tregs exhibited diminished neutrophil counts. Together, these findings illustrate that both recipient and donor Tregs can influence hematopoietic progenitor cell activity after transplantation and that these cells can alter responses outside the adaptive and innate immune systems.
UR - http://www.scopus.com/inward/record.url?scp=77954717369&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77954717369&partnerID=8YFLogxK
U2 - 10.1182/blood-2009-04-218826
DO - 10.1182/blood-2009-04-218826
M3 - Article
C2 - 20200356
AN - SCOPUS:77954717369
SN - 0006-4971
VL - 115
SP - 4934
EP - 4943
JO - Blood
JF - Blood
IS - 23
ER -