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Kołodzińska A, Kutarski A, Kozłowska M, Grabowski M, Marchel H, Drela N, Opolski G. Biodegradation of the Outer Silicone Insulation of Endocardial Leads. Circ Arrhythm Electrophysiol 2013; 6:279-86. [DOI: 10.1161/circep.112.000069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Agnieszka Kołodzińska
- From the Department of Cardiology (A. Kołodzin´ska, M.K., M.G., G.O.), and Department of Microbiology (H.M.), Medical University of Warsaw, Warsaw, Poland; Faculty of Biology (N.D.), University of Warsaw, Warsaw, Poland; and Department of Cardiology, Medical University of Lublin, Lublin, Poland (A. Kutarski)
| | - Andrzej Kutarski
- From the Department of Cardiology (A. Kołodzin´ska, M.K., M.G., G.O.), and Department of Microbiology (H.M.), Medical University of Warsaw, Warsaw, Poland; Faculty of Biology (N.D.), University of Warsaw, Warsaw, Poland; and Department of Cardiology, Medical University of Lublin, Lublin, Poland (A. Kutarski)
| | - Marta Kozłowska
- From the Department of Cardiology (A. Kołodzin´ska, M.K., M.G., G.O.), and Department of Microbiology (H.M.), Medical University of Warsaw, Warsaw, Poland; Faculty of Biology (N.D.), University of Warsaw, Warsaw, Poland; and Department of Cardiology, Medical University of Lublin, Lublin, Poland (A. Kutarski)
| | - Marcin Grabowski
- From the Department of Cardiology (A. Kołodzin´ska, M.K., M.G., G.O.), and Department of Microbiology (H.M.), Medical University of Warsaw, Warsaw, Poland; Faculty of Biology (N.D.), University of Warsaw, Warsaw, Poland; and Department of Cardiology, Medical University of Lublin, Lublin, Poland (A. Kutarski)
| | - Halina Marchel
- From the Department of Cardiology (A. Kołodzin´ska, M.K., M.G., G.O.), and Department of Microbiology (H.M.), Medical University of Warsaw, Warsaw, Poland; Faculty of Biology (N.D.), University of Warsaw, Warsaw, Poland; and Department of Cardiology, Medical University of Lublin, Lublin, Poland (A. Kutarski)
| | - Nadzieja Drela
- From the Department of Cardiology (A. Kołodzin´ska, M.K., M.G., G.O.), and Department of Microbiology (H.M.), Medical University of Warsaw, Warsaw, Poland; Faculty of Biology (N.D.), University of Warsaw, Warsaw, Poland; and Department of Cardiology, Medical University of Lublin, Lublin, Poland (A. Kutarski)
| | - Grzegorz Opolski
- From the Department of Cardiology (A. Kołodzin´ska, M.K., M.G., G.O.), and Department of Microbiology (H.M.), Medical University of Warsaw, Warsaw, Poland; Faculty of Biology (N.D.), University of Warsaw, Warsaw, Poland; and Department of Cardiology, Medical University of Lublin, Lublin, Poland (A. Kutarski)
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Bhattacharya V, Shi Q, Ishida A, Sauvage LR, Hammond WP, Wu MH. Administration of granulocyte colony-stimulating factor enhances endothelialization and microvessel formation in small-caliber synthetic vascular grafts. J Vasc Surg 2000; 32:116-23. [PMID: 10876212 DOI: 10.1067/mva.2000.107308] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The purpose of this study was to determine whether systemic administration of granulocyte colony-stimulating factor (G-CSF) would promote endothelialization for small-caliber Dacron vascular grafts. METHODS We implanted 4-mm preclotted Dacron grafts in both carotids of 12 dogs. For a fair comparison, all dogs had a comparable platelet aggregation profile with platelet aggregation scores less than 30. Five dogs served as controls, and the others were given 7-day subcutaneous injections of G-CSF (10 microg/kg per day), starting on the seventh postoperative day. The effect of G-CSF was evaluated by white blood cell count, which showed a 3.7-fold (+/- 2.7-fold) increase at the end of treatment. Grafts were harvested at 4 weeks. All G-CSF grafts were patent, and one control occluded. Endothelial-like cell coverage averaged 80.8% on G-CSF grafts, but only 35.6% for control grafts (P <.0004). With the exclusion of the anastomotic pannus healing factor, the difference in endothelial-like cell coverage was even greater (68.5% vs 9.8%; P <.0001). Immunocytochemical staining and electron microscopy studies demonstrated endothelial cells. Light microscopy also showed that there were more microvessels on and in the G-CSF grafts than in the control grafts. This study suggests that G-CSF can enhance early endothelialization of small-caliber vascular grafts. Further studies to determine the proper dosage and timing are needed before clinical application can be recommended.
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Affiliation(s)
- V Bhattacharya
- Hope Heart Institute, Providence Seattle Medical Center, Seattle, WA, USA
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Kouchi Y, Onuki Y, Wu MH, Shi Q, Ghali R, Wechezak AR, Kaplan S, Walker M, Sauvage LR. Apparent blood stream origin of endothelial and smooth muscle cells in the neointima of long, impervious carotid-femoral grafts in the dog. Ann Vasc Surg 1998; 12:46-54. [PMID: 9451996 DOI: 10.1007/s100169900114] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The purpose of this study was to determine whether endothelial and smooth muscle cells originating from the blood stream contribute to the endothelialization of impervious, small-caliber, long Dacron grafts used as extraanatomical bypasses in dogs. We implanted silicone-rubber-coated, permanently impervious grafts 64 to 77 cm long and 6 mm in diameter, made of externally supported knitted Dacron as unilateral carotid-femoral bypasses with distal femoral arteriovenous fistulae in 10 dogs for 3 months; sides were alternated between cases. Subjects received 162 mg/day of aspirin, and its effectiveness on platelet aggregation (PA) was evaluated and expressed as a PA score. Graft healing was studied by stereomicroscopy with silver nitrate staining, by light microscopy with hematoxylin-eosin and immunocytochemical staining for endothelial and smooth muscle cells, and by scanning and transmission electron microscopy. Five grafts were patent for 3 months and could be included in the healing study; the five occluded grafts thrombosed within 14 days. Although there was no transinterstitial tissue ingrowth from perigraft tissues into the impervious Dacron grafts, scattered islands of endothelial cells were conclusively demonstrated on graft flow surfaces 3 months after implantation. Average endothelial-like cell coverage of the flow surfaces was 15.6% +/- 3.8%, and alpha-actin-positive smooth muscle cells and microvessels were found beneath some of the endothelial islands. These findings suggest that blood stream-derived endothelial and smooth muscle cells play a role in the healing of the inner wall of Dacron grafts in the dog.
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Affiliation(s)
- Y Kouchi
- The Hope Heart Institute, the Providence Medical Center, and the Department of Surgery, University of Washington School of Medicine, Seattle 98122, USA
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