Rogler, Gerhard and Hausmann, M. and Vogl, D. and Aschenbrenner, E. and Andus, T. and Falk, W. and Andreesen, Reinhard and Schoelmerich, Juergen and Gross, V. (1998) Isolation and phenotypic characterization of colonic macrophages. CLINICAL AND EXPERIMENTAL IMMUNOLOGY, 112 (2). pp. 205-215. ISSN 0009-9104,
Full text not available from this repository. (Request a copy)Abstract
Macrophages play an important role in the intestinal mucosal immune system. However, they are a poorly defined cell population. We therefore determined their phenotype in normal colonic mucosa. Macrophages were isolated from colonic biopsies and surgical specimens by collagenase digestion. Colonic macrophages were positively sorted by anti-CD33 magnetic beads. Flow cytometric triple fluorescence analysis was applied to study CD14, CD16, CD33, CD44, CD11b, CD11c, CD64, HLA-DR, CD80, CD86 and CD3/CD19 expression. CD33 was evaluated as a positive marker for intestinal macrophages. CD33(+) cells isolated from normal colonic mucosa showed co-expression of the established intracellular macrophage marker CD68 in FAGS analysis. CD33(+) cells were capable of phagocytosis. Isolation of this cell population by magnetic anti-CD33 beads and culture resulted in a 4.2-40-fold increase in IL-1 beta and 4.5-44-fold increase in tumour necrosis factor-alpha (TNF-alpha) secretion compared with unsorted lamina propria mononuclear cells (LPMC). Of the CD33(+) cells, 90.9 +/- 69.0 (mean +/- s.d.) were CD44(+). However, macrophages from colonic mucosa showed only a low expression of CD14 (10.5 +/- 3.8%), CD16 (10.1 +/- 3.9%), HLA-DR (27.3 +/- 9.2%), CD11b (17.4 +/- 6.8%), CD11c (17.8 +/- 10.4%). Furthermore, expression of CD80 (9.2 +/- 4.2%) and CD86 (15.1 +/- 7.3%) was low, suggesting a low ability of normal intestinal macrophages to activate T cells and T cell-mediated immune responses. We conclude that CD33 is useful for the isolation and flow cytometric characterization of colonic macrophages. These cells exhibit a single phenotype in normal mucosa (CD33(++), CD44(++), CD14(-), CD16(-), CD11b(-), CD11c(-), HLA-DRlow, CD80(-), CD86(-)) lacking lipopolysaccharide (LPS) receptor and costimulatory molecules.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INFLAMMATORY BOWEL-DISEASE; ALVEOLAR MACROPHAGES; PULMONARY SARCOIDOSIS; LAMINA PROPRIA; FLOW-CYTOMETRY; EXPRESSION; MOLECULES; CELLS; DIFFERENTIATION; MONOCYTES; macrophages; intestine; CD33; CD14; CD80; CD86 |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Innere Medizin I |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 May 2023 10:38 |
| Last Modified: | 23 May 2023 10:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/49830 |
Actions (login required)
 |
View Item |
