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Gene transfer approaches to the regulation of vascular cell proliferation
1Departments of Internal Medicine, Physiology and Biological Chemistry, University of Michigan, Ann Arbor 48109-0644, USA.
Abstract:
Considerable progress has been made in identifying potential targets for treating vascular proliferative diseases. In this review, we discuss gene transfer approaches to regulating smooth muscle cell proliferation after vascular injury using the cell cycle specific proteins, p21, delta Rb and HSV-tk. Results from these studies suggest that replicating smooth muscle cells and macrophages are inhibited in vivo in several animal models of restenosis, including hyperlipidaemic vessels. Identification of appropriate vascular diseases and improvements in gene delivery and vectors will require careful optimization in order to develop effective molecular therapies for human vascular diseases.
Insights
Gene transfer targeting cell cycle proteins like p21 can inhibit smooth muscle cell proliferation and macrophage replication in animal models of vascular disease. Further optimization is needed for effective human therapies.
Area of Science:
- Vascular biology and regenerative medicine.
- Molecular therapy and gene transfer.
- Cell cycle regulation in disease.
Background:
- Vascular proliferative diseases, such as restenosis, involve uncontrolled smooth muscle cell proliferation after injury.
- Current treatments have limitations, necessitating novel therapeutic strategies.
- Gene transfer offers a promising approach to modulate cellular processes involved in vascular disease.
Purpose of the Study:
- To review gene transfer strategies for controlling smooth muscle cell proliferation post-vascular injury.
- To evaluate the efficacy of targeting cell cycle proteins (p21, delta Rb, HSV-tk) in preclinical models.
- To discuss the potential for molecular therapies in treating human vascular proliferative diseases.
Main Methods:
- Review of studies employing gene transfer techniques.
- Focus on the use of cell cycle-specific proteins as therapeutic targets.
- In vivo assessment in animal models of vascular injury and restenosis.
Main Results:
- Gene transfer targeting p21, delta Rb, and HSV-tk demonstrated inhibition of smooth muscle cell replication.
- Macrophage replication was also suppressed in vivo.
- Efficacy observed in various animal models, including hyperlipidaemic vessels and restenosis models.
Conclusions:
- Gene transfer approaches using cell cycle regulators show potential for treating vascular proliferative diseases.
- Successful translation to human therapies requires further optimization of gene delivery and vector systems.
- Targeting smooth muscle cell proliferation and macrophage activity is a viable strategy for molecular therapy.