In vitro priming and expansion of cytomegalovirus-specific Th1 and Tc1 T cells from naive cord blood lymphocytes

KD Park, L Marti, J Kurtzberg, P Szabolcs - Blood, 2006 - ashpublications.org
KD Park, L Marti, J Kurtzberg, P Szabolcs
Blood, 2006ashpublications.org
Adoptive transfer of CMV-specific cytotoxic T cells (CTLs) expanded in vitro from memory
donor T cells can reduce the incidence of CMV disease in allogeneic transplant recipients.
However, this approach has been unavailable in the cord blood (CB) transplantation setting
because CB T cells are antigen naive and biased toward Th2/Tc2 function. We developed a
protocol to in vitro prime and expand CMV-specific CTLs from CB. T cells were primed with
cytokines to trigger skewing toward Th1/Tc1 lineage before encountering monocyte and …
Adoptive transfer of CMV-specific cytotoxic T cells (CTLs) expanded in vitro from memory donor T cells can reduce the incidence of CMV disease in allogeneic transplant recipients. However, this approach has been unavailable in the cord blood (CB) transplantation setting because CB T cells are antigen naive and biased toward Th2/Tc2 function. We developed a protocol to in vitro prime and expand CMV-specific CTLs from CB. T cells were primed with cytokines to trigger skewing toward Th1/Tc1 lineage before encountering monocyte and CD34+ progenitor-derived dendritic cells loaded with CMV antigen and its immune complex. CMV-pulsed cultures expanded significantly more over 4 to 6 weeks than CMV cultures despite identical cytokine milieu. T cells isolated from CMV+ cultures showed a preferential expansion of CD45RA-/RO+/CD27+ T cells compared to CMV- cultures. CMV-specific IFN-γ- and TNF-α-producing CD4+ (Th1) and CD8+ (Tc1) T cells were enriched after 3 to 4 weeks and CMV-specific cytotoxicity developed 1 to 2 weeks later.
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