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Expression of CD68 positive macrophages in the use of different barrier materials to prevent peritoneal adhesions-an animal study

Journal article
Authors C. Brochhausen
V. H. Schmitt
A. Mamilos
C. Schmitt
C. N. E. Planck
T. K. Rajab
H. Hierlemann
Charles James Kirkpatrick
Published in Journal of Materials Science-Materials in Medicine
Volume 28
Issue 15
ISSN 0957-4530
Publication year 2017
Published at Institute of Clinical Sciences, Department of Biomaterials
Language en
Keywords mesothelial cells, growth-factor, abdominal adhesiolysis, activated, macrophages, human fibroblasts, united-states, fibrosis, biomaterials, pathogenesis, molecules, Engineering, Materials Science
Subject categories Biomaterials Science


In preventing postoperative adhesion formation the optimal barrier material has still not been found. It is therefore imperative to assess the biocompatibility of potential barrier devices. Macrophages play a decisive role in the regulation of wound healing, tissue regeneration and foreign body reaction. Since the number of CD68-positive macrophages represents an important parameter within biomaterial testing, in the present study it was analysed whether a correlation exists between the total number of CD68-positive macrophages and the extent of fibrosis or inflammation in peritoneal adhesion prevention using biomaterials. After standardized peritoneal wounding, Wistar rats were treated with five adhesion barriers or remained untreated as a control. After 14 days, animals were sacrificed and the treated areas were evaluated histomorphologically and immunohistologically. A heterogeneous pattern of macrophage count in relation to fibrosis or inflammation was found. While some groups described a moderate macrophage infiltration without fibrosis, others showed similar numbers of macrophages, but accompanied by moderate fibrosis. Moreover, a minimal number of macrophages was associated with minimal fibrosis. Mild inflammation was seen both with minimal and moderate macrophage infiltration. Altogether, no correlation could be established between the tissue response and the count of CD68-positive macrophages. With a view to macrophage heterogeneity further studies are required to determine the different macrophage subpopulations and clarify the role of these in the tissue responses to barrier materials.

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