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Sprague EA, Tio F, Ahmed SH, Granada JF, Bailey SR. Impact of Parallel Micro-Engineered Stent Grooves on Endothelial Cell Migration, Proliferation, and Function. Circ Cardiovasc Interv 2012; 5:499-507. [DOI: 10.1161/circinterventions.111.967901] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Stent luminal surface characteristics influence surface endothelialization. We hypothesize that luminal stent microgrooves created in the direction of coronary flow accelerate endothelial cell migration, resulting in lower levels of neointimal formation.
Methods and Results—
Surface coverage efficiency was evaluated in vitro by allowing human aortic endothelial cells (HAEC) to migrate onto microgrooved (G) or smooth (NG) surfaces. HAEC functionality was assessed by proliferation rate, apoptosis rate, nitric oxide production, and inflammatory markers TNF-α and VCAM-1 expression. Early endothelialization and restenosis studies were performed using the porcine coronary injury model. Stainless steel stents of identical design with (GS) and without (NGS) luminal microgrooves were used. The commercially available Multi-Link Vision (MLVS) stent of identical design was used as a control. The degree of GS and NGS surface endothelialization was compared at 3 days. Biocompatibility and tissue response outcomes were evaluated at 28 days. The in vitro study demonstrated that at 7 days the presence of surface microgrooves increased HAEC migration distance >2-fold. Cell proliferation rate and nitric oxide production were increased and apoptosis rate was decreased. There was no difference in inflammatory marker expression. At 3 days, coronary artery stent endothelialization was significantly increased in GS compared with NGS (81.3% versus 67.5%,
P
=0.0002). At 28 days, GS exhibited lower neointimal thickness compared with either NGS (21.1%,
P
=0.011) or MLVS (40.8%,
P
=0.014).
Conclusion—
Parallel microgrooves on coronary stent luminal surfaces promote endothelial cell migration and positively influence endothelial cell function, resulting in decreased neointimal formation in the porcine coronary injury model.
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77
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Marmagkiolis K, Hakeem A, Cilingiroglu M, Bailey SR, Ruiz C, Hijazi ZM, Herrmann HC, Zajarias A, Goldberg SL, Feldman T. The society for cardiovascular angiography and interventions structural heart disease early career task force survey results: Endorsed by the society for cardiovascular angiography and interventions. Catheter Cardiovasc Interv 2012; 80:706-11. [DOI: 10.1002/ccd.24535] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Accepted: 06/25/2012] [Indexed: 11/09/2022]
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78
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Borer KE, Bailey SR, Harris PA, Elliott J. Contractile responses of isolated equine digital arteries under hypoxic or hyperoxic conditions in vitro: role of reactive oxygen species and Rho kinase. J Vet Pharmacol Ther 2012; 36:267-74. [PMID: 22762272 DOI: 10.1111/j.1365-2885.2012.01423.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The underlying pathophysiological triggers for equine acute laminitis are unknown, although digital vasoconstriction, ischaemia, hypoxia and reperfusion injury may be involved. The contractile responses of isolated equine digital arteries (EDAs), harvested from the hindlimbs of normal horses postmortem at an abattoir, were studied acutely (up to 3 h) under hyperoxic (95% oxygen, 5% CO2 ) and hypoxic (95% nitrogen, 5% CO2 ) conditions in organ baths. Phenylephrine (PHE; 10(-6) m), 5-hydroxytryptamine (5-HT; 10(-7) m) and high potassium (K(+) ; 118 mm) caused contraction in EDAs which was significantly (P<0.0001) enhanced under hypoxic conditions. In contrast, contraction stimulated by 9,11-dideoxy-9α,11α-epoxymethanoprostaglandin F2α (U44069; 3 × 10(-8) m) was not significantly enhanced by hypoxia (P=0.75). Hypoxia-enhanced contraction in response to K(+) was greater (P<0.03) in vessels with a functional endothelium than in vessels in which the endothelium was removed by rubbing. Fasudil (10(-6) to 10(-5) m), a Rho kinase inhibitor, and apocynin (10(-3) to 3 × 10(-3) m), an NADPH oxidase inhibitor, significantly (P ≤ 0.05) inhibited hypoxia-enhanced contraction in response to PHE and 5-HT. In conclusion, hypoxia-enhanced contraction occurred in EDAs. This appears to be partially mediated by reactive oxygen species produced by NAPDH oxidase, which activate Rho kinase to increase calcium sensitisation and enhance smooth muscle contraction.
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79
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Levine GN, Bates ER, Blankenship JC, Bailey SR, Bittl JA, Cercek B, Chambers CE, Ellis SG, Guyton RA, Hollenberg SM, Khot UN, Lange RA, Mauri L, Mehran R, Moussa ID, Mukherjee D, Nallamothu BK, Ting HH. 2011 ACCF/AHA/SCAI Guideline for Percutaneous Coronary Intervention: executive summary: a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines and the Society for Cardiovascular Angiography and Interventions. Catheter Cardiovasc Interv 2012; 79:453-95. [PMID: 22328235 DOI: 10.1002/ccd.23438] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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80
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Patel MR, Bailey SR, Bonow RO, Chambers CE, Chan PS, Dehmer GJ, Kirtane AJ, Wann LS, Ward RP, Douglas PS, Patel MR, Bailey SR, Altus P, Barnard DD, Blankenship JC, Casey DE, Dean LS, Fazel R, Gilchrist IC, Kavinsky CJ, Lakoski SG, Le DE, Lesser JR, Levine GN, Mehran R, Russo AM, Sorrentino MJ, Williams MR, Wong JB, Wolk MJ, Bailey SR, Douglas PS, Hendel RC, Kramer CM, Min JK, Patel MR, Shaw L, Stainback RF, Allen JM. ACCF/SCAI/AATS/AHA/ASE/ASNC/HFSA/HRS/SCCM/SCCT/SCMR/STS 2012 appropriate use criteria for diagnostic catheterization: American College of Cardiology Foundation Appropriate Use Criteria Task Force Society for Cardiovascular Angiography and Interventions American Association for Thoracic Surgery American Heart Association, American Society of Echocardiography American Society of Nuclear Cardiology Heart Failure Society of America Heart Rhythm Society, Society of Critical Care Medicine Society of Cardiovascular Computed Tomography Society for Cardiovascular Magnetic Resonance Society of Thoracic Surgeons. Catheter Cardiovasc Interv 2012; 80:E50-81. [PMID: 22678595 DOI: 10.1002/ccd.24467] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The American College of Cardiology Foundation, in collaboration with the Society for Cardiovascular Angiography and Interventions and key specialty and subspecialty societies, conducted a review of common clinical scenarios where diagnostic catheterization is frequently considered. The indications (clinical scenarios) were derived from common applications or anticipated uses, as well as from current clinical practice guidelines and results of studies examining the implementation of noninvasive imaging appropriate use criteria. The 166 indications in this document were developed by a diverse writing group and scored by a separate independent technical panel on a scale of 1 to 9, to designate appropriate use (median 7 to 9), uncertain use (median 4 to 6), and inappropriate use (median 1 to 3). Diagnostic catheterization may include several different procedure components. The indications developed focused primarily on 2 aspects of diagnostic catheterization. Many indications focused on the performance of coronary angiography for the detection of coronary artery disease with other procedure components (e.g., hemodynamic measurements, ventriculography) at the discretion of the operator. The majority of the remaining indications focused on hemodynamic measurements to evaluate valvular heart disease, pulmonary hypertension, cardiomyopathy, and other conditions, with the use of coronary angiography at the discretion of the operator. Seventy-five indications were rated as appropriate, 49 were rated as uncertain, and 42 were rated as inappropriate. The appropriate use criteria for diagnostic catheterization have the potential to impact physician decision making, healthcare delivery, and reimbursement policy. Furthermore, recognition of uncertain clinical scenarios facilitates identification of areas that would benefit from future research. © 2012 Wiley Periodicals, Inc.
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Patel MR, Dehmer GJ, Hirshfeld JW, Smith PK, Spertus JA, Masoudi FA, Dehmer GJ, Patel MR, Smith PK, Chambers CE, Ferguson TB, Garcia MJ, Grover FL, Holmes DR, Klein LW, Limacher MC, Mack MJ, Malenka DJ, Park MH, Ragosta M, Ritchie JL, Rose GA, Rosenberg AB, Russo AM, Shemin RJ, Weintraub WS, Wolk MJ, Bailey SR, Douglas PS, Hendel RC, Kramer CM, Min JK, Patel MR, Shaw L, Stainback RF, Allen JM. ACCF/SCAI/STS/AATS/AHA/ASNC/HFSA/SCCT 2012 appropriate use criteria for coronary revascularization focused update: a report of the American College of Cardiology Foundation Appropriate Use Criteria Task Force, Society for Cardiovascular Angiography and Interventions, Society of Thoracic Surgeons, American Association for Thoracic Surgery, American Heart Association, American Society of Nuclear Cardiology, and the Society of Cardiovascular Computed Tomography. J Thorac Cardiovasc Surg 2012; 143:780-803. [PMID: 22424518 DOI: 10.1016/j.jtcvs.2012.01.061] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The American College of Cardiology Foundation (ACCF), Society for Cardiovascular Angiography and Interventions, Society of Thoracic Surgeons, and the American Association for Thoracic Surgery, along with key specialty and subspecialty societies, conducted an update of the appropriate use criteria (AUC) for coronary revascularization frequently considered. In the initial document, 180 clinical scenarios were developed to mimic patient presentations encountered in everyday practice and included information on symptom status, extent of medical therapy, risk level as assessed by noninvasive testing, and coronary anatomy. This update provides a reassessment of clinical scenarios the writing group felt to be affected by significant changes in the medical literature or gaps from prior criteria. The methodology used in this update is similar to the initial document, and the definition of appropriateness was unchanged. The technical panel scored the clinical scenarios on a scale of 1 to 9. Scores of 7 to 9 indicate that revascularization is considered appropriate and likely to improve patients' health outcomes or survival. Scores of 1 to 3 indicate revascularization is considered inappropriate and unlikely to improve health outcomes or survival. Scores in the mid-range (4 to 6) indicate a clinical scenario for which the likelihood that coronary revascularization will improve health outcomes or survival is uncertain. In general, as seen with the prior AUC, the use of coronary revascularization for patients with acute coronary syndromes and combinations of significant symptoms and/or ischemia is appropriate. In contrast, revascularization of asymptomatic patients or patients with low-risk findings on noninvasive testing and minimal medical therapy are viewed less favorably. The technical panel felt that based on recent studies, coronary artery bypass grafting remains an appropriate method of revascularization for patients with high burden of coronary artery disease (CAD). Additionally, percutaneous coronary intervention may have a role in revascularization of patients with high burden of CAD. The primary objective of the appropriate use criteria is to improve physician decision making and patient education regarding expected benefits from revascularization and to guide future research.
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82
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Patel MR, Bailey SR, Bonow RO, Chambers CE, Chan PS, Dehmer GJ, Kirtane AJ, Wann LS, Ward RP. ACCF/SCAI/AATS/AHA/ASE/ASNC/HFSA/HRS/SCCM/SCCT/SCMR/STS 2012 Appropriate Use Criteria for Diagnostic Catheterization. J Am Coll Cardiol 2012; 59:1995-2027. [DOI: 10.1016/j.jacc.2012.03.003] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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83
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Sprague EA, Bailey SR. Abstract 525: Reduced Ability of Endothelial Progenitor Cells to Inhibit Smooth Muscle Cell Proliferation and Migration Compared to Aortic Endothelial Cells Under Flow. Arterioscler Thromb Vasc Biol 2012. [DOI: 10.1161/atvb.32.suppl_1.a525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Early endothelial restoration at sites of vascular intervention is one of the recognized important potential treatment strategies that can be exploited to limit arterial restenosis associated with intimal smooth muscle cell hyperplasia. In recent years, much attention has been focused on the potential of circulating bone marrow derived cells named endothelial progenitor cells (EPC) to differentiate into mature endothelial cells upon attachment at injured vascular sites and, thereby, potentially limit intimal hyperplasia. Our objective was to compare the influence of isolated porcine blood EPC and aortic endothelial cells (HAEC) on the proliferation and migration of underlying aortic smooth muscle (SMC) cells using a novel arterial wall model system exposed to arterial flow patterns. An in vitro arterial wall model co-culture system was constructed as the bottom plate within a parallel plate flow chamber. A 2mm thick collagen gel containing porcine SMC was overlayed by a porous (5μm) polyester mesh. After 2 days, either porcine aortic EC or CD34+ EPC or no cells (control) were seeded on the surface and allowed to attain confluence. These constructs were then placed into a flow chamber and exposed to arterial flow (12 dynes/cm
2
) for 48h using circulating culture medium. After the flow regimen, SMC that had migrated through the mesh were immunologically identified and counted. The mesh was removed and the percent proliferating cells in the underlying gel were identified by PCNA staining.EC coverage resulted in an almost 7-fold inhibition of SMC migration compared to control (127±33 vs 840±193 SMC/cm
2
) and more than 4- fold more than observed with EPC coverage (553±7 SMC/cm
2
). Similarly, EC coverage resulted in reducing SMC proliferation to 3.2% compared to 8.5% in EPC covered SMC and 14% PCNA positive SMC in the control underlying SMC. These result indicate that blood-derived CD34+ EPC are less effective in limiting adjacent SMC proliferation and migration than native arterial endothelial cells. This may have important implications for strategies designed to employ or attract these cells as a means to limit restenosis at stented interventional sites.
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84
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Holmes DR, Mack MJ, Kaul S, Agnihotri A, Alexander KP, Bailey SR, Calhoon JH, Carabello BA, Desai MY, Edwards FH, Francis GS, Gardner TJ, Kappetein AP, Linderbaum JA, Mukherjee C, Mukherjee D, Otto CM, Ruiz CE, Sacco RL, Smith D, Thomas JD, Harrington RA, Bhatt DL, Ferrari VA, Fisher JD, Garcia MJ, Gardner TJ, Gentile F, Gilson MF, Hernandez AF, Jacobs AK, Kaul S, Linderbaum JA, Moliterno DJ, Weitz HH. 2012 ACCF/AATS/SCAI/STS Expert Consensus Document on Transcatheter Aortic Valve Replacement. Catheter Cardiovasc Interv 2012; 79:1023-82. [DOI: 10.1002/ccd.24351] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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85
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Holmes DR, Mack MJ, Kaul S, Agnihotri A, Alexander KP, Bailey SR, Calhoon JH, Carabello BA, Desai MY, Edwards FH, Francis GS, Gardner TJ, Kappetein AP, Linderbaum JA, Mukherjee C, Mukherjee D, Otto CM, Ruiz CE, Sacco RL, Smith D, Thomas JD. 2012 ACCF/AATS/SCAI/STS Expert Consensus Document on Transcatheter Aortic Valve Replacement. Ann Thorac Surg 2012; 93:1340-95. [PMID: 22300625 DOI: 10.1016/j.athoracsur.2012.01.084] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 01/26/2012] [Accepted: 01/26/2012] [Indexed: 12/20/2022]
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86
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Giugliano GR, Falcone MW, Mego D, Ebersole D, Jenkins S, Das T, Barker E, Ruggio JM, Maini B, Bailey SR. A prospective multicenter registry of laser therapy for degenerated saphenous vein graft stenosis: the COronary graft Results following Atherectomy with Laser (CORAL) trial. CARDIOVASCULAR REVASCULARIZATION MEDICINE 2012; 13:84-9. [DOI: 10.1016/j.carrev.2012.01.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 12/15/2011] [Accepted: 01/06/2012] [Indexed: 11/25/2022]
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87
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Holmes DR, Mack MJ, Kaul S, Agnihotri A, Alexander KP, Bailey SR, Calhoon JH, Carabello BA, Desai MY, Edwards FH, Francis GS, Gardner TJ, Kappetein AP, Linderbaum JA, Mukherjee C, Mukherjee D, Otto CM, Ruiz CE, Sacco RL, Smith D, Thomas JD. 2012 ACCF/AATS/SCAI/STS expert consensus document on transcatheter aortic valve replacement. J Am Coll Cardiol 2012; 59:1200-54. [PMID: 22300974 DOI: 10.1016/j.jacc.2012.01.001] [Citation(s) in RCA: 544] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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88
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Levine GN, Bates ER, Blankenship JC, Bailey SR, Bittl JA, Cercek B, Chambers CE, Ellis SG, Guyton RA, Hollenberg SM, Khot UN, Lange RA, Mauri L, Mehran R, Moussa ID, Mukherjee D, Nallamothu BK, Ting HH. 2011 ACCF/AHA/SCAI Guideline for Percutaneous Coronary Intervention: Executive Summary. J Am Coll Cardiol 2011. [DOI: 10.1016/j.jacc.2011.08.006] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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89
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Li X, Villard JW, Ouyang Y, Michalek JE, Jabara R, Sims D, Kemp N, Glynn T, Banas C, Bailey SR, Feldman MD. Safety and efficacy of frequency domain optical coherence tomography in pigs. EUROINTERVENTION 2011; 7:497-504. [PMID: 21764669 DOI: 10.4244/eijv7i4a80] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIMS To determine the safety and efficacy of frequency domain OCT, which can scan at much higher rates and make it possible to avoid an occlusion balloon and image during an angiographic injection through guide catheter. The catheters have diameters ranging from 2.7 to 3.5 Fr. The presence of the imaging catheter increases fluid resistance to the injection of viscous solutions necessary for clearing the blood. METHODS AND RESULTS The Volcano 3.5 Fr frequency domain OCT catheter system was investigated for safety in (a) n=10 porcine studies using acute and 30-day histology, and (b) for efficacy in n=9 in vivo porcine coronary arteries. We found: (a) frequency domain imaging is safe in the porcine model using histology as an endpoint; (b) the addition of a viscous contrast (iodixonal) to saline is superior for lumen clearance compared to saline alone; (c) hand injection, 4 ml/sec, and 6 ml/sec power injection all provided similar vessel wall clearance; (d) the anticipated loss of vessel wall visualisation with left main injection (due to half the injectate in the non-imaged vessel) was not evident in proximal and middle coronary artery OCT catheter positions. CONCLUSIONS Frequency domain OCT is safe and efficacious in the porcine model.
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90
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Levine GN, Bates ER, Blankenship JC, Bailey SR, Bittl JA, Cercek B, Chambers CE, Ellis SG, Guyton RA, Hollenberg SM, Khot UN, Lange RA, Mauri L, Mehran R, Moussa ID, Mukherjee D, Nallamothu BK, Ting HH. 2011 ACCF/AHA/SCAI Guideline for Percutaneous Coronary Intervention: executive summary: a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines and the Society for Cardiovascular Angiography and Interventions. Circulation 2011; 124:2574-609. [PMID: 22064598 DOI: 10.1161/cir.0b013e31823a5596] [Citation(s) in RCA: 381] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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91
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Levine GN, Bates ER, Blankenship JC, Bailey SR, Bittl JA, Cercek B, Chambers CE, Ellis SG, Guyton RA, Hollenberg SM, Khot UN, Lange RA, Mauri L, Mehran R, Moussa ID, Mukherjee D, Nallamothu BK, Ting HH, Ting HH. 2011 ACCF/AHA/SCAI Guideline for Percutaneous Coronary Intervention: a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines and the Society for Cardiovascular Angiography and Interventions. Circulation 2011; 124:e574-651. [PMID: 22064601 DOI: 10.1161/cir.0b013e31823ba622] [Citation(s) in RCA: 894] [Impact Index Per Article: 68.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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92
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Levine GN, Bates ER, Blankenship JC, Bailey SR, Bittl JA, Cercek B, Chambers CE, Ellis SG, Guyton RA, Hollenberg SM, Khot UN, Lange RA, Mauri L, Mehran R, Moussa ID, Mukherjee D, Nallamothu BK, Ting HH, Jacobs AK, Anderson JL, Albert N, Creager MA, Ettinger SM, Guyton RA, Halperin JL, Hochman JS, Kushner FG, Ohman EM, Stevenson W, Yancy CW. 2011 ACCF/AHA/SCAI Guideline for Percutaneous Coronary Intervention. Catheter Cardiovasc Interv 2011; 82:E266-355. [DOI: 10.1002/ccd.23390] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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93
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Zhu B, Bailey SR, Agrawal CM. Calcification of primary human osteoblast cultures under flow conditions using polycaprolactone scaffolds for intravascular applications. J Tissue Eng Regen Med 2011; 6:687-95. [PMID: 21932279 DOI: 10.1002/term.472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2010] [Revised: 05/30/2011] [Accepted: 07/05/2011] [Indexed: 11/10/2022]
Abstract
Total atherosclerotic occlusion is a leading cause of death. Recent animal models of this disease are devoid of cell-mediated calcification and arteries are often not occluded gradually. This study is part of a project with the objective of developing a new model featuring the above two characteristics, using a tissue-engineering scaffold. The amount and distribution of calcium deposits in primary human osteoblast (HOB) cultures on polycaprolactone (PCL) scaffolds under flow conditions were investigated. HOBs were cultured on PCL scaffolds with TGF-β1 loadings of 0 (control), 5 and 50 ng. HOB-PCL constructs were cultured in spinner flasks. Under flow conditions, cell numbers present in HOB cultures on PCL scaffolds increased from day 7 to day 14, and most calcification was induced at day 21. TGF-β1 loadings of 5 and 50 ng did not show a significant difference in ALP activity, cell numbers and amount of calcium deposited in HOB cultures, but calcium staining showed that 50 ng TGF-β1 had higher calcium deposited on both days 21 and 28 under flow conditions compared with 5 ng of loading. Amount of calcium deposited by HOBs on day 28 showed a decrease from their levels on day 21. PCL degradation may be a factor contributing to this loss. The results indicate that cell-induced calcification can be achieved on PCL scaffolds under flow conditions. In conclusion, TGFβ1-HOB loaded PCL can be applied to create a model for total atherosclerotic occlusion with cell-deposited calcium in animal arteries.
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94
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Douglas PS, Patel MR, Bailey SR, Dai D, Kaltenbach L, Brindis RG, Messenger J, Peterson ED. Hospital Variability in the Rate of Finding Obstructive Coronary Artery Disease at Elective, Diagnostic Coronary Angiography. J Am Coll Cardiol 2011; 58:801-9. [DOI: 10.1016/j.jacc.2011.05.019] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 04/26/2011] [Accepted: 05/03/2011] [Indexed: 12/27/2022]
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95
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Zhu B, Bailey SR, Elliott J, Li X, Escobar GP, Rodriguez EM, Agrawal CM. Development of a total atherosclerotic occlusion with cell-mediated calcium deposits in a rabbit femoral artery using tissue-engineering scaffolds. J Tissue Eng Regen Med 2011; 6:193-204. [PMID: 21400666 DOI: 10.1002/term.413] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Accepted: 11/30/2010] [Indexed: 01/07/2023]
Abstract
This study sought to establish a chronic total occlusion (CTO) model with cell-mediated calcium deposits in rabbit femoral arteries. CTO is the most severe case in atherosclerosis and contains calcium deposits. Previous animal models of CTO do not mimic the gradual occlusion of arteries or have calcium in physiological form. In the present study we tested the strategy of placing tissue-engineering scaffolds preloaded with cells in arteries to develop a novel CTO model. Primary human osteoblasts (HOBs) were first cultured in vitro on polycaprolactone (PCL) scaffolds with 5 ng TGFβ1 loading for 28 days for precalcification. The HOB-PCL construct was then implanted into a rabbit femoral artery for an additional 3, 10 or 28 days. At the time of sacrifice, angiograms and gross histology of arteries were captured to examine the occlusion of arteries. Fluorescent staining of calcium and EDS detection of calcium were used to evaluate the presence and distribution of calcium inside arteries. Rabbit femoral arteries were totally occluded over 28 days. Calcium was presented at CTO sites at 3, 10 and 28 days, with the day 10 specimens showing the maximum calcium. Chronic inflammatory response and recanalization were observed in day 28 CTO sites. A novel CTO model with cell-mediated calcium has been successfully established in a rabbit femoral artery. This model can be used to develop new devices and therapies to treat severe atherosclerotic occlusion.
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96
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Bailey SR. Letter from the editor. Catheter Cardiovasc Interv 2010. [DOI: 10.1002/ccd.22934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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97
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Bergen E, Bailey SR. Recurrent popliteal endoprosthesis thrombosis secondary to extrinsic compression. Catheter Cardiovasc Interv 2010; 77:746-9. [DOI: 10.1002/ccd.22811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2010] [Accepted: 08/31/2010] [Indexed: 11/08/2022]
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98
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Abizaid A, Weiner B, Bailey SR, Londero H. Use of a self-expanding super-elastic all-metal endoprosthesis; To treat degenerated SVG lesions: The SESAME first in man trial. Catheter Cardiovasc Interv 2010; 76:781-6. [DOI: 10.1002/ccd.22687] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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99
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Zhu B, Bailey SR, Mauli Agrawal C. Engineering calcium deposits on polycaprolactone scaffolds for intravascular applications using primary human osteoblasts. J Tissue Eng Regen Med 2010; 5:324-36. [DOI: 10.1002/term.327] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Accepted: 04/27/2010] [Indexed: 11/08/2022]
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100
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Bailey SR. All in favor of radial percutaneous coronary intervention, raise your (patient's) hand. Catheter Cardiovasc Interv 2010; 75:996. [PMID: 20517958 DOI: 10.1002/ccd.22625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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