Abstract
Therapeutic angiogenesis is the attempt to increase vascular density by means of an exogenously administered proangiogenic agent and offers a potential treatment for diseases associated with tissue ischemia. Vascular endothelial growth factor (VEGF) expressed by gene therapy has been shown to be a potent stimulator of angiogenesis and to improve the function of ischemic tissues in patients [Isner, 1998]. Unregulated gene therapy is disconcerting since there is no assurance that the treatment will target the ischemic territory. A new regulated adeno-associated viral vector expressing VEGF 163 that is conditionally silenced has been developed by one of the authors (KAW). The transgene expression is regulated by silencing the genes in the absence of the disease and at the same time having strong and local activation in the presence of the disease. The purpose of this work is to establish protocols and techniques to quantify the efficacy of therapeutic angiogenesis. The initial phase of this research involves assessment of angiogenesis using an unregulated, adenoviral vector that is encoded to express VEGF 165. Using the rabbit hind limb ischemia model, angiography was performed on animals that were given the proangiogenic treatment and on a sham group, in which phosphate buffered saline (PBS) was injected. Angiographic contrast intensity curves were obtained, modeled, and the optimized model parameters provided insight into flow characteristics within the targeted vascular bed. In the second phase of the project the conditionally silent vector will be employed using the developed protocols and methods of the first phase to afford comparisons with the previous groups.
| Original language | English (US) |
|---|---|
| Title of host publication | American Society of Mechanical Engineers, Bioengineering Division (Publication) BED |
| Publisher | American Society of Mechanical Engineers (ASME) |
| Pages | 295-296 |
| Number of pages | 2 |
| Volume | 55 |
| DOIs | |
| State | Published - 2003 |
| Event | 2003 ASME International Mechanical Engineering Congress - Washington, DC., United States Duration: Nov 15 2003 → Nov 21 2003 |
Other
| Other | 2003 ASME International Mechanical Engineering Congress |
|---|---|
| Country | United States |
| City | Washington, DC. |
| Period | 11/15/03 → 11/21/03 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
Angiographic quantification of angiogenesis. / Gounis, Matthew J.; Lieber, Baruch B.; Webster, Keith A; Wasserlauf, Bernard J.; Prentice, Howard M.; Wakhloo, Ajay K.
American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. Vol. 55 American Society of Mechanical Engineers (ASME), 2003. p. 295-296.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Angiographic quantification of angiogenesis
AU - Gounis, Matthew J.
AU - Lieber, Baruch B.
AU - Webster, Keith A
AU - Wasserlauf, Bernard J.
AU - Prentice, Howard M.
AU - Wakhloo, Ajay K.
PY - 2003
Y1 - 2003
N2 - Therapeutic angiogenesis is the attempt to increase vascular density by means of an exogenously administered proangiogenic agent and offers a potential treatment for diseases associated with tissue ischemia. Vascular endothelial growth factor (VEGF) expressed by gene therapy has been shown to be a potent stimulator of angiogenesis and to improve the function of ischemic tissues in patients [Isner, 1998]. Unregulated gene therapy is disconcerting since there is no assurance that the treatment will target the ischemic territory. A new regulated adeno-associated viral vector expressing VEGF 163 that is conditionally silenced has been developed by one of the authors (KAW). The transgene expression is regulated by silencing the genes in the absence of the disease and at the same time having strong and local activation in the presence of the disease. The purpose of this work is to establish protocols and techniques to quantify the efficacy of therapeutic angiogenesis. The initial phase of this research involves assessment of angiogenesis using an unregulated, adenoviral vector that is encoded to express VEGF 165. Using the rabbit hind limb ischemia model, angiography was performed on animals that were given the proangiogenic treatment and on a sham group, in which phosphate buffered saline (PBS) was injected. Angiographic contrast intensity curves were obtained, modeled, and the optimized model parameters provided insight into flow characteristics within the targeted vascular bed. In the second phase of the project the conditionally silent vector will be employed using the developed protocols and methods of the first phase to afford comparisons with the previous groups.
AB - Therapeutic angiogenesis is the attempt to increase vascular density by means of an exogenously administered proangiogenic agent and offers a potential treatment for diseases associated with tissue ischemia. Vascular endothelial growth factor (VEGF) expressed by gene therapy has been shown to be a potent stimulator of angiogenesis and to improve the function of ischemic tissues in patients [Isner, 1998]. Unregulated gene therapy is disconcerting since there is no assurance that the treatment will target the ischemic territory. A new regulated adeno-associated viral vector expressing VEGF 163 that is conditionally silenced has been developed by one of the authors (KAW). The transgene expression is regulated by silencing the genes in the absence of the disease and at the same time having strong and local activation in the presence of the disease. The purpose of this work is to establish protocols and techniques to quantify the efficacy of therapeutic angiogenesis. The initial phase of this research involves assessment of angiogenesis using an unregulated, adenoviral vector that is encoded to express VEGF 165. Using the rabbit hind limb ischemia model, angiography was performed on animals that were given the proangiogenic treatment and on a sham group, in which phosphate buffered saline (PBS) was injected. Angiographic contrast intensity curves were obtained, modeled, and the optimized model parameters provided insight into flow characteristics within the targeted vascular bed. In the second phase of the project the conditionally silent vector will be employed using the developed protocols and methods of the first phase to afford comparisons with the previous groups.
UR - http://www.scopus.com/inward/record.url?scp=1842508240&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1842508240&partnerID=8YFLogxK
U2 - 10.1115/IMECE2003-43196
DO - 10.1115/IMECE2003-43196
M3 - Conference contribution
VL - 55
SP - 295
EP - 296
BT - American Society of Mechanical Engineers, Bioengineering Division (Publication) BED
PB - American Society of Mechanical Engineers (ASME)
ER -