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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Aronica, Mark A. Lauer, Mark E. Cheng, Georgiana Swaidani, Shadi Hascall, Vincent C. Weigel, Paul H. |
| Description | Author Affiliation: Lauer ME ( Department of Biomedical Engineering, Cleveland Clinic, Cleveland, Ohio 44195, USA. lauerm1@ccf.org) |
| Abstract | We tested the hypothesis that the artificial addition of heavy chains from inter- -inhibitor to hyaluronan (HA), by adding recombinant TSG-6 (TNF-stimulated gene-6) to the culture medium of murine airway smooth muscle (MASM) cells, would enhance leukocyte binding to HA cables produced in response to poly(I:C). As predicted, the addition of heavy chains to HA cables enhanced leukocyte adhesion to these cables, but it also had several unexpected effects. (i) It produced thicker, more pronounced HA cables. (ii) It increased the accumulation of HA in the cell-associated matrix. (iii) It decreased the amount of HA in the conditioned medium. Importantly, these effects were observed only when TSG-6 was administered in the presence of poly(I:C), and TSG-6 did not exert any effect on its own. Increased HA synthesis occurred during active, poly(I:C)-induced HA synthesis and did not occur when TSG-6 was added after poly(I:C)-induced HA synthesis was complete. MASM cells derived from TSG-6(-/-), HAS1/3(-/-), and CD44(-/-) mice amplified HA synthesis in response to poly(I:C) + TSG-6 in a manner similar to WT MASM cells, demonstrating that they are expendable in this process. We conclude that TSG-6 increases the accumulation of HA in the cell-associated matrix, partially by preventing its dissolution from the cell-associated matrix into the conditioned medium, but primarily by inducing HA synthesis. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 1 |
| Volume Number | 288 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2013-01-04 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cell Adhesion Molecules Metabolism Hyaluronic Acid Leukocytes Cytology Myocytes, Smooth Muscle Recombinant Proteins Animals Carbohydrates Chemistry Culture Media, Conditioned Pharmacology Extracellular Matrix Fluorescent Dyes Homozygote Inflammation Mice Poly I-C Trachea U937 Cells Research Support, N.I.H., Extramural Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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