Atherosclerosis and restenosis after therapeutic interventions are characterized by smooth muscle cell (SMC) accumulation and extracellular matrix (ECM) deposition in the vessel wall. Growth factor production seems to play a role in the initiation of these processes, but the role of growth factors in the long-term response to injury is unknown. The investigators propose that basic fibroblast growth factor (bFGF) is important in not only the immediate response of the arterial wall to injury, but also in the chronic response. They hypothesize that after injury, there are distinct activities of bFGF and FGF receptor (FGFR), such that delivery into the artery wall of an adenoviral vector encoding antisense to bFGF (ASbFGF) or a kinase defective, dominant negative bFGF receptor (dnFGFR-1) will alter the activity of bFGF or its receptor in the arterial wall, and thereby modify the arterial response to injury. To test this hypothesis injured rat carotid arteries will be infected with an adenoviral vector encoding ASbFGF or dnFGFR-1. The expression of bFGF ligand or its receptor will be compared with controls. In addition, the consequence of infection with ASbFGF or dnFGFR-1 will be assessed in terms of SMC proliferation, migration, apoptosis, and ECM deposition and wall thickening. This should yield a better understanding of the response of the artery wall to injury and the role of bFGF in the process. This will allow more directed approaches to control the pathologic process by manipulating bFGF signaling.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
5R01HL056605-03
Application #
6043912
Study Section
Special Emphasis Panel (ZRG7-SSS-X (79))
Project Start
1997-08-01
Project End
2001-07-31
Budget Start
1999-08-01
Budget End
2001-07-31
Support Year
3
Fiscal Year
1999
Total Cost
Indirect Cost
Name
University of Pennsylvania
Department
Surgery
Type
Schools of Medicine
DUNS #
042250712
City
Philadelphia
State
PA
Country
United States
Zip Code
19104
Lombardi, J V; Naji, M; Larson, R A et al. (2001) Adenoviral mediated uteroglobin gene transfer to the adventitia reduces arterial intimal hyperplasia. J Surg Res 99:377-80
Larson, R A; Naji, M; Lombardi, J V et al. (2000) Adenoviral-mediated uteroglobin gene transfer inhibits neointimal hyperplasia after balloon injury in the rat carotid artery. J Vasc Surg 32:1111-7
Hanna, A K; Duran, W N; Leconte, I et al. (2000) Adenoviral-mediated expression of antisense RNA to basic fibroblast growth factor reduces tangential stress in arterialized vein grafts. J Vasc Surg 31:770-80
Golden, M A; Neschis, D G (1998) Gene therapy. Semin Vasc Surg 11:215-23