Abstract
Naïve CD4+ T cells develop different effector T cells and cytokine profiles after antigenic stimulation. It has been previously documented that fibrocytes function as antigen presenting cells inducing proliferation as well as Th2 cytokine response in naïve CD4+ T cells. Our group has reported that several circulating cell types recruited to the wound site can be transformed into anti-fibrotic profile cells, which subsequently induce MMP-1 stimulation in dermal fibroblasts. Here, we report how similar reprogramming pathway of fibrocytes could modify the CD4+ T cell response. Our findings confirmed that reprogrammed fibrocytes induce CD4+ T cell activation with a mixed Th1/Th2 cytokine response. Since a reciprocal positive feedback between Th2 cells and fibrocytes exist to amplify and perpetuate the pro-fibrotic stimulation in dermal fibroblasts, the novel transdifferentiation of regular mature fibrocytes into reprogrammed fibrocytes appears to be a promising strategy to reverse the Th2 cytokine overproduction, and subsequently control the local fibrogenesis.
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Acknowledgments
We gratefully acknowledge M. Levings and members of her laboratory for suggestions and technical assistance in ELISA. We gratefully acknowledge M. Ochoa and E. Brown for critically reading the manuscript. We also thank the Cell Separator Unit at Vancouver General Hospital for providing blood. This work was supported by grants from the Canadian Institutes of Health Research (MOP-84276) and UBC Department of Surgery (Concept Award). Abelardo Medina holds a Canada Graduate Scholarships Doctoral Award 2006–2009 from the Canadian Institutes of Health Research.
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Medina, A., Ghahary, A. Reprogrammed fibrocytes induce a mixed Th1/Th2 cytokine response of naïve CD4+ T cells. Mol Cell Biochem 346, 89–94 (2011). https://doi.org/10.1007/s11010-010-0595-2
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DOI: https://doi.org/10.1007/s11010-010-0595-2