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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Rhoads, D. Eskin, S. McIntire, L. |
| Copyright Year | 1999 |
| Description | Author affiliation: Cox Lab. for Biomed. Eng., Rice Univ., Houston, TX, USA (Rhoads, D.) |
| Abstract | Fibroblast growth factor-2 (FGF-2) is a potent mitogen involved in the response to vascular injury. However, mechanisms controlling FGF-2 release are not clearly understood. We studied the effect of shear stress on the release of FGF-2 from human aortic smooth muscle cells (HASMC) using an in vitro parallel plate flow system. FGF-2 levels were measured from the conditioned medium, pericellular fraction (extracted by heparin treatment), and cell lysate. Results indicated that after only 15 minutes of shear stress (25 dyn/cm/sup 2/), 17% of the total FGF-2 was released from HASMC. FGF-2 levels in circulating medium increased 10-fold versus static controls. A 50% increase in FGF-2 was detected in heparin extracts following shear stress. Furthermore, a significant decrease in FGF-2 was detected in the cell lysate, indicating that FGF-2 was released from inside the cell. Permeability studies using a fluorescent dye were performed to identify transient membrane disruption as the mechanism of FGF-2 release. After cells were sheared in the presence of medium containing FITC-dextran, flow cytometry detected a 50% increase in mean fluorescence versus control cells. This result suggests that flow-induced FGF-2 release is due to transient membrane disruption. |
| File Size | 135076 |
| File Format | |
| ISBN | 0780356748 |
| ISSN | 1094687X |
| DOI | 10.1109/IEMBS.1999.802038 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1999-10-13 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Fluid flow Fibroblasts Humans Stress Fluorescence Biomembranes Injuries Fluid flow control Muscles In vitro |
| Content Type | Text |
| Resource Type | Article |
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