Abstract
Significant numbers of macrophages are present during all stages of dermal wound repair, but the functional significance of these macrophages, especially during the later contraction and remodelling stages of repair, remains unclear. We investigated the effect of macrophages on wound contraction using a novel in vitro model based upon the contracting dermal equivalent (DE). Macrophages were found to reversibly restrain DE contraction, a rapid and sustained effect that was enhanced by lipolysaccharide (LPS) treatment of macrophages and partially inhibited by hydrocortisone. Prolonged inhibition of contraction was strongly correlated with an inhibition of fibroblast proliferation. The rapid contraction-inhibiting effect of the macrophages was mediated through activation of protein kinase C (PKC). These results suggest that inflammatory macrophages restrain the later stages of wound repair, namely matrix contraction and remodeling. The novel in vitro model established here provides a useful system for examining fibroblast–macrophage interactions in the healing wound.
Similar content being viewed by others
REFERENCES
O'Leary, R., E. J. Wood, and P. J. Guillou. 2002. Pathological scar-ring: Strategic interventions. Eur. J. Surg. 168(10):523–534.
Nedelec, B., A. Ghahary, P. G. Scott, and E. E. Tredget. 2000. Control of wound contraction: Basic and clinical features. Hand Clin. 16(2):289–302.
Powell, D. W., R. C. Mifflin, J. D. Valentich, S. E. Crowe, J. I. Sadda, A. B. West, and I. Myofibroblasts. 1999. Myofibroblasts I, Paracrine cells important in health and disease. Am.J.Physiol. 277(1):C1–C9.
Dyson, M., S. Young, C. L. Pendle, D. F. Webster, and S. M. Lang. 1988. Comparison of the effects of moist and dry conditions on dermal repair. J. Invest. Dermatol. 91(5):434–439.
Clark, R. A. F. 1996. Wound repair: Overview and general consid-erations. In: The Molecular and Cellular Biology of Wound Repair, Chapter 1, 2nd edn., Plenum Press, New York.
Riches, D. W.1996. Macrophage involvement in wound repair, remodelling and fibrosis. In: The Molecular and Cellular Biology of Wound Repair, Chapter 3., 2nd edn., R. A. F. Clark, ed., Plenum Press, New York.
Martin, P., D. D'Souza, J. Martin, R. Grose, L. Cooper, R. Maki, and S. R. McKercher. 2003. Wound healing in the PU.1 null mouse-tissue repair is not dependent on inflammatory cells. Curr. Biol. 13(13):1122–1128.
Bell, E., B. Ivarsson, and C. Merrill. 1979. Production of a tissue-like structure by contraction of collagen lattices by human fibroblasts of different proliferative potential in vitro. Proc. Natl. Acad. Sci. USA 76(3):1274–1278.
Grinnell, F. 2000. Fibroblast–collagen–matrix contraction: Growth-factor signalling and mechanical loading. Trends Cell Biol. 10(9):362–365.
Vaughan, M. B., E. W. Howard, and J. J. Tomasek. 2000. Transforming growth factor-beta1 promotes the morphological and functional differentiation of the myofibroblast. Exp. Cell Res. 257(1):180–189.
Scott, K. A., E. J. Wood, and E. H. Karran. 1998. A matrix metal-loproteinase inhibitor which prevents fibroblast-mediated collagen lattice contraction. FEBS Lett. 441(1):137–140.
Garlick, J. A. and L. B. Taichman. 1994. Fate of human keratinocytes during reepithelialization in an organotypic culture model. Lab. In-vest. 70(6):916–924.
De, S. K., E. D. Reis, and M. D. Kerstein. 2002. Wound treatment with human skin equivalent. J. Am. Podiatr. Med. Assoc. 92(1): 19–23.
Harris, P. and P. Ralph. 1985. Human leukemic models of myelomonocytic development: A review of the HL-60 and U937 cell lines. J. Leukoc. Biol. 37(4):407–422.
Welgus, H. G., N. L. Connolly, and R. M. Senior. 1986. 12-o-Tetradecanoyl-phorbol-13-acetate-differentiated U937 cells express a macrophage-like profile of neutral proteinases. High levels of se-creted collagenase and collagenase inhibitor accompany low levels of intracellular elastase and cathepsin G. J. Clin. Invest. 77(5):1675–1681.
Chen, V., D. Croft, P. Purkis, and I. M. Kramer. 1998. Co-culture of synovial fibroblasts and differentiated U937 cells is sufficient for high interleukin-6 but not interleukin-1beta or tumour necrosis factor-alpha release. Br. J. Rheumatol. 37(2):148–156.
Scott, B. B., L. M. Weisbrot, J. D. Greenwood, E. R. Bogoch, C. J. Paige, and E. C. Keystone. 1997. Rheumatoid arthritis synovial fibroblast and U937 macrophage/monocyte cell line interaction in cartilage degradation. Arthritis Rheum. 40(3):490–498.
Boyce, D. E., A. Thomas, J. Hart, K. Moore, and K. Harding. 1997. Hyaluronic acid induces tumour necrosis factor-alpha production by human macrophages in vitro. Br.J.Plast.Surg. 50(5):362–368.
Moore, K., A. Thomas, and K. G. Harding. 1997. Iodine released from the wound dressing Iodosorb modulates the secretion of cy-tokines by human macrophages responding to bacterial lipopolysac-charide. Int. J. Biochem. Cell Biol. 29(1): 163–171.
Thomas, A., K. G. Harding, and K. Moore. 2000. Alginates from wound dressings activate human macrophages to secrete tumour necrosis factor-alpha. Biomaterials 21(17): 1797–1802.
Minta, J. O. and L. Pambrun. 1985. In vitro induction of cytologic and functional differentiation of the immature human monocyte-like cell line U-937 with phorbol myristate acetate. Am. J. Pathol. 119(1):111–126.
Hosoya, H. and T. Marunouchi. 1992. Differentiation and dediffer-entiation of the human monocytic leukemia cell line, U937. Cell Struct. Funct. 17(5):263–269.
Bachus, K. E., E. Doty, A. F. Haney, and J. B. Weinberg. 1995. Differential effects of interleukin-1 alpha, tumor necrosis factor-alpha, indomethacin, hydrocortisone, and macrophage co-culture on the proliferation of human fibroblasts and peritoneal mesothelial cells. J. Soc. Gynecol. Investig. 2(4):636–642.
Metzger, Z., D. Berg, and M. Dotan. 1997. Fibroblast growth in vitro suppressed by LPS-activated macrophages. Reversal of suppression by hydrocortisone. J. Endod. 23(8):517–521.
Schultz, R. M., M. A. Chirigos, J. N. Stoychkov, and N. A. Pavlidis. 1979. Factors affecting macrophage cytotoxic activity with particu-lar emphasis on corticosteroids and acute stress. J. Reticuloendothel. Soc. 26(1):83–92.
Danowski, B. A. and A. K. Harris. 1988. Changes in fibroblast contractility, morphology, and adhesion in response to a phorbol ester tumor promoter. Exp. Cell Res. 177(1):47–59.
Guidry, C., 1993. Fibroblast contraction of collagen gels requires activation of protein kinase C. J. Cell Physiol. 155(2):358–367.
Shiota, T., D. H. Bernanke, A. D. Parent, and K. Hasui. 1996. Protein kinase C has two different major roles in lattice compaction enhanced by cerebrospinal fluid from patients with subarachnoid hemorrhage. Stroke 27(10):1889–1895.
Xu, J. and R. A. Clark. 1997. A three-dimensional collagen lat-tice induces protein kinase C-zeta activity: Role in alpha2 inte-grin and collagenase mRNA expression. J. Cell Biol. 136(2):473–483.
Chandrasekher, G., N. G. Bazan, and H. E. Bazan. 1998. Selective changes in protein kinase C (PKC) isoform expression in rabbit corneal epithelium during wound healing. Inhibition of corneal epithelial repair by PKCalpha antisense. Exp. Eye Res. 67(5):603–610.
Wallis, S., S. Lloyd, I. Wise, G. Ireland, T. P. Fleming, and D. Garrod. 2000. The alpha isoform of protein kinase C is involved in signaling the response of desmosomes to wound-ing in cultured epithelial cells. Mol. Biol. Cell. 11(3):1077–1092.
Wang, Y. C., Y. S. Hsieh, Y. W. Tang, and J. Y. Liu. 1999. Protein kinase C isoforms in the epidermal tissues of normal and postburn human skin. Biochem. Mol. Biol. Int. 47(4):673–679.
Chen, L., L. R. Wright, C. H. Chen, S. F. Oliver, P. A. Wender, and D. Mochly-Rosen. 2001. Molecular transporters for peptides: Delivery of a cardioprotective epsilon PKC agonist peptide into cells and intact ischemic heart using a transport system, R(7). Chem. Biol. 8(12):1123–1129.
Rowling, P. J., M. J. Raxworthy, E. J. Wood, J. N. Kearney, and W. J. Cunliff. 1990. Fabrication and reorganization of dermal equivalents suitable for skin grafting after major cutaneous injury. Biomaterials 11(3):181–185.
Arora, P. D., N. Narani, and C. A. McCulloch. 1999. The compliance of collagen gels regulates transforming growth factor-beta induction of alpha-smooth muscle actin in fibroblasts. Am. J. Pathol. 154(3):871–882.
Mio, T., Y. Adachi, D. J. Romberger, R. F. Ertl, and S. I. Rennard. 1996. Regulation of fibroblast proliferation in three-dimensional collagen gel matrix. In Vitro Cell Dev. Biol. Anim. 32(7):427–433.
Zhu, Y., C. M. Skold, X. Liu, H. Wang, T. Kohyama, F. Q. Wen, R. F. Ertl, and S. I. Rennard. 2001. Fibroblasts and monocyte macrophages contract and degrade three-dimensional collagen gels in extended co-culture. Respir Res. 2(5):295–299.
Skold, C. M., X. D. Liu, T. Umino, Y. K. Zhu, R. F. Ertl, D. J. Romberger, and S. I. Rennard. 2000. Blood monocytes attenuate lung fibroblast contraction of three-dimensional collagen gels in coculture. Am. J. Physiol. Lung Cell Mol. Physiol. 279(4):L667–L674.
Dostal, G. H. and R. L. Gamelli. 1990. The differential effect of corticosteroids on wound disruption strength in mice. Arch. Surg. 125(5):636–640.
Paxton, T. P., R. H. Miles, and R. L. Gamelli. 1995. Differential effects of 21-aminosteroids on wound healing. J. Trauma. 38(6):920–923.
Connell, P. G. and C. C. Harland. 2000. Treatment of keloid scars with pulsed dye laser and intralesional steroid. J. Cutan. Laser. Ther. 2(3): 147–150.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Newton, P.M., Watson, J.A., Wolowacz, R.G. et al. Macrophages Restrain Contraction of an In Vitro Wound Healing Model. Inflammation 28, 207–214 (2004). https://doi.org/10.1023/B:IFLA.0000049045.41784.59
Issue Date:
DOI: https://doi.org/10.1023/B:IFLA.0000049045.41784.59