Abstract
Wounds are one of the most frequently occurring medical complication. Stem cells were recently highlighted as a novel therapeutic approach to treating wounds, although some negative aspects of allogenic stem cell transplantation were observed, such as cellular source limitations and unknown side effects in vivo. To address and eliminate these side effects, we examined the wound healing effect of secretory factors released from human cord blood-derived stem cells (hCB-SCs) and human umbilical vascular endothelial cells (HUVECs) on cutaneous excisional wound models. The hCB-SCs retained endothelial progenitor cell characteristics and expressed MSC markers such as CD73, CD105, and CD44. Analysis of hCB-SC-conditioned medium (CM) indicated that hCB-SCs secrete distinctly unique cytokines and chemokines such as TGF-β, PDGF, bFGF, EGF, KGF, and VEGF, which are well known to be important in normal angiogenesis and wound healing. Furthermore, hCB-SCs also secreted stem cell-recruiting factors such as G-CSF and GM-CSF, whereas HUVECs did not. When CB-SC-CM was applied to wound sites, hCB-SC-CM accelerated the wound healing rate compared with HUVEC-CM- and control medium-treated groups. In addition, hCB-SC-CM treatment caused a more rapid re-formation of granulation tissue and re-epithelialization of wounds, which indicates that the therapeutic effect of hCB-SC-CM is due to secreted stem cell-recruiting factors from stem cells, not just from endothelial lineage cells. Taken together, these results suggest that secretory factors released from stem cells, not just from endothelial cells, could be an important mediator of stem cell therapy in ischemic tissue diseases.
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References
Branski L. K.; Gauglitz G. G.; Herndon D. N.; Jeschke M. G. A review of gene and stem cell therapy in cutaneous wound healing. Burns 35: 171–180; 2009.
Cha J.; Falanga V. Stem cells in cutaneous wound healing. Clin. Dermatol. 25: 73–78; 2007.
Cho S. W.; Moon S. H.; Lee S. H. et al. Improvement of postnatal neovascularization by human embryonic stem cell derived endothelial-like cell transplantation in a mouse model of hindlimb ischemia. Circulation 116: 2409–2419; 2007.
Diegelmann R. F.; Evans M. C. Wound healing: an overview of acute, fibrotic and delayed healing. Front. Biosci. 9: 283–289; 2004.
Fathke C.; Wilson L.; Hutter J. et al. Contribution of bone marrow-derived cells to skin: collagen deposition and wound repair. Stem Cells 22: 812–822; 2004.
Ferreira L. S.; Gerecht S.; Fuller J.; Shieh H. F.; Vunjak-Novakovic G.; Langer R. Bioactive hydrogel scaffolds for controllable vascular differentiation of human embryonic stem cells. Biomaterials 28: 2706–2717; 2007.
Kim W. S.; Park B. S.; Sung J. H. The wound-healing and antioxidant effects of adipose-derived stem cells. Expert Opin. Biol. Ther. 9: 879–887; 2009.
Kim W. S.; Park B. S.; Sung J. H. et al. Wound healing effect of adipose-derived stem cells: a critical role of secretory factors on human dermal fibroblasts. J. Dermatol. Sci. 48: 15–24; 2007.
Levenberg S.; Zoldan J.; Basevitch Y.; Langer R. Endothelial potential of human embryonic stem cells. Blood 110: 806–814; 2007.
Levenberg S. G. J.; Amit M.; Itskovitz-Eldor J.; Langer R. Endothelial cells derived from human embryonic stem cells. Proc. Natl. Acad. Sci. U. S. A. 99: 4391–4396; 2002.
Li H.; Fu X.; Ouyang Y.; Cai C.; Wang J.; Sun T. Adult bone-marrow-derived mesenchymal stem cells contribute to wound healing of skin appendages. Cell Tissue Res. 326: 725–736; 2006.
Li W. W.; Jaffe M.; Tsakayannis D.; Li V. W. Lessons to be learned from clinical trials of angiogenesis modulators in ischemic diseases. In: Rubanyi G. (ed) Angiogenesis in health and disease. M. Dekker, Inc., NY; 1999.
McFarlin K.; Gao X.; Liu Y. B. et al. Bone marrow-derived mesenchymal stromal cells accelerate wound healing in the rat. Wound Repair Regen. 14: 471–478; 2006.
Monaco J. L.; Lawrence W. T. Acute wound healing an overview. Clin. Plast. Surg. 30: 1–12; 2003.
Ono I.; Gunji H.; Zhang J. Z.; Maruyama K.; Kaneko F. Studies on cytokines related to wound healing in donor site wound fluid. J. Dermatol. Sci. 10: 241–245; 1995.
Sen C. K. Wound healing essentials: let there be oxygen. Wound Repair Regen. 17: 1–18; 2009.
Suh W.; Kim K. L.; Kim J. M. et al. Transplantation of endothelial progenitor cells accelerates dermal wound healing with increased recruitment of monocytes/macrophages and neovascularization. Stem Cells 23: 1571–1578; 2005.
Templin C.; Grote K.; Schledzewski K. et al. Ex vivo expanded haematopoietic progenitor cells improve dermal wound healing by paracrine mechanisms. Exp. Dermatol. 18: 445–453; 2009.
Urbich C.; Aicher A.; Heeschen C. et al. Soluble factors released by endothelial progenitor cells promote migration of endothelial cells and cardiac resident progenitor cells. J. Mol. Cell. Cardiol. 39: 733–742; 2005.
Velazquez O. C. Angiogenesis and vasculogenesis: inducing the growth of new blood vessels and wound healing by stimulation of bone marrow-derived progenitor cell mobilization and homing. J. Vasc. Surg. 45(Suppl A): A39–A47; 2007.
Wu Y.; Wang J.; Scott P. G.; Tredget E. E. Bone marrow-derived stem cells in wound healing: a review. Wound Repair Regen. 15(Suppl 1): S18–S26; 2007.
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This research was supported by the Agenda Program (No.PJ00932102) from Rural Development Administration, Republic of Korea.
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Editor: T. Okamoto
Jumi Kim and Ji Hye Lee contributed equally to this work.
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Supplementary Fig. 1
Quantification analysis of c-kit positive cells in wound site after treatment of control-, hCB-SC and HUVEC conditioned medium at day 5. Quantification analysis result for c-kit positive cells in 10mm X 10mm tissue slide (n = 4) at day 5 after treatment of control-, hCB-SC and HUVEC conditioned medium. Statistical analysis was performed with the t-test. A value of P < 0.05 was considered statistically significant. The significance of differences was evaluated by paired two-tailed student’s t-tests (SAS version 8.0, Cary, NC, USA) (JPEG 38 kb)
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Kim, J., Lee, J.H., Yeo, S.M. et al. Stem cell recruitment factors secreted from cord blood-derived stem cells that are not secreted from mature endothelial cells enhance wound healing. In Vitro Cell.Dev.Biol.-Animal 50, 146–154 (2014). https://doi.org/10.1007/s11626-013-9687-0
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DOI: https://doi.org/10.1007/s11626-013-9687-0