期刊
ATHEROSCLEROSIS
卷 251, 期 -, 页码 226-233出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.atherosclerosis.2016.06.046
关键词
Atherosclerosis; Neointimal proliferation; Peripheral arterial disease; Restenosis; Collagens
资金
- Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York
- Endovascular Interventional Surgery, Icahn School of Medicine at Mount Sinai, New York
- US National Institutes of Health (NIH)/NHLBI [T32-HL007824-18]
Background and aims: Neointimal cellular proliferation of fibroblasts and myofibroblasts is documented in coronary artery restenosis, however, their role in peripheral arterial disease (PAD) restenosis remains unclear. Our aim was to investigate the role of fibroblasts, myofibroblasts, and collagens in restenotic PAD. Methods: Nineteen PAD restenotic plaques were compared with 13 de novo plaques. Stellate cells (H&E), fibroblasts (FSP-1), myofibroblasts (alpha-actin/vimentin/FSP-1), cellular proliferation (Ki-67), and apoptosis (caspase-3 with poly ADP-ribose polymerase) were evaluated by immunofluorescence. Collagens were evaluated by picro-sirius red stain with polarization microscopy. Smooth muscle myosin heavy chain (SMMHC), IL-6 and TGF-beta cytokines were analyzed by immunohistochemistry. Results: Restenotic plaques demonstrated increased stellate cells (2.7 +/- 0.15 vs. 1.3 +/- 0.15) fibroblasts (2282.2 +/- 85.9 vs. 906.4 +/- 134.5) and myofibroblasts (18.5 +/- 1.2 vs. 10.6 +/- 1.0) p = 0.0001 for all comparisons. In addition, fibroblast proliferation (18.4% +/- 1.2 vs. 10.4% +/- 1.1; p = 0.04) and apoptosis (14.6% +/- 1.3 vs. 11.2% +/- 0.6; p = 0.03) were increased in restenotic plaques. Finally, SMMHC (2.6 +/- 0.12 vs. 1.4 +/- 0.15; p = 0.0001), type III collagen density (0.33 +/- 0.06 vs. 0.17 +/- 0.07; p = 0.0001), IL-6 (2.08 +/- 1.7 vs. 1.03 +/- 2.0; p = 0.01), and TGF-beta (1.80 +/- 0.27 vs. 1.11 +/- 0.18; p = 0.05) were increased in restenotic plaques. Conclusions: Our study suggests proliferation and apoptosis of fibroblast and myofibroblast with associated increase in type III collagen may play a role in restenotic plaque progression. Understanding pathways involved in proliferation and apoptosis in neointimal cells, may contribute to future therapeutic interventions for the prevention of restenosis in PAD. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
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