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Updated: May 28, 2026
Mouse Models for Graft Arteriosclerosis
Published on: May 14, 2013
Mechanism of arterial remodeling in chronic allograft vasculopathy
Qichang Zheng1, Shanglong Liu, Zifang Song
1Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
Insights
Chronic allograft vasculopathy (CAV) involves arterial remodeling, leading to graft failure. This review details intimal injury, smooth muscle cell changes, and extracellular matrix deposition in vessel walls.
Area of Science:
- Vascular Biology
- Transplantation Immunology
- Regenerative Medicine
Background:
- Chronic allograft vasculopathy (CAV) significantly limits long-term graft survival despite therapeutic advances.
- CAV is characterized by neointimal proliferation, medial apoptosis, inflammation, and extracellular matrix deposition in graft vasculature.
- Recipient-derived stem cells contribute to neointimal formation, regulated by chemokines and cytokines.
Purpose of the Study:
- To review the arterial remodeling processes in chronic allograft vasculopathy.
- To focus on the multi-factorial pathogenesis of CAV, emphasizing non-immunological aspects of arterial wall changes.
Main Methods:
- Literature review focusing on arterial remodeling in CAV.
- Analysis of pathological changes in the intimal, medial, and adventitial layers of graft vessels.
- Synthesis of current understanding of cellular and matrix contributions to CAV pathogenesis.
Main Results:
- CAV involves concentric and diffuse neointimal formation.
- Key pathological features include medial smooth muscle cell apoptosis, inflammatory cell infiltration, and extracellular matrix deposition.
- Arterial remodeling culminates in ischemic graft failure.
Conclusions:
- Arterial remodeling is a critical component of CAV pathogenesis.
- Understanding intimal injury, smooth muscle cell dynamics, and extracellular matrix accumulation is crucial for developing new therapies.
- Targeting these arterial remodeling processes may improve long-term graft survival.
Abstract:
Chronic allograft vasculopathy (CAV) remains a major obstacle for long-term survival of grafts even though therapeutic strategies have improved considerably in recent years. CAV is characterized by concentric and diffuse neointimal formation, medial apoptosis, infiltration of lymphocyte or inflammatory cells, and deposition of extracellular matrix both in arteries and veins. Recent studies have shown that stem cells derived from the recipient contribute to neointimal formation under the regulation of chemokines and cytokines. Arterial remodeling in allografts eventually causes ischemic graft failure. The pathogenesis is multi-factorial with both immunologic and non-immunological factors being involved. The immunological factors have been discussed extensively in other articles. This review focuses mainly on the arterial remodeling that occurs in 3 layers of vessel walls including intimal injury, accumulation of smooth muscle-like cells in the neointimal, medial smooth muscle cell apoptosis, adventitial fibrosis, and deposition of extracellular matrix.
