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Chen D, Krinsky C, Phillips M, Allred C, Khan A, Liu LB, Christians U, Yazdani SK. Design and use of an ex vivo peripheral simulating bioreactor system for pharmacokinetic analysis of a drug coated stent. Bioeng Transl Med 2024; 9:e10618. [PMID: 38435812 PMCID: PMC10905536 DOI: 10.1002/btm2.10618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 10/02/2023] [Accepted: 10/15/2023] [Indexed: 03/05/2024] Open
Abstract
Currently, there are no ex vivo systems that can model the motion of peripheral arteries and allow for the evaluation of pharmacokinetics (PK) of endovascular devices. The objective of this study was to develop a novel peripheral simulating bioreactor system to evaluate drug pharmacokinetics of stents. We utilized 3D-printed and off-the-shelf components to construct a peripheral-simulating bioreactor system capable of mimicking the motion of peripheral arteries. Servo motors were primarily used to shorten/elongate, twist, and bend explanted porcine carotid arteries. To evaluate the pharmacokinetics in the bioreactor, drug-eluting stents were deployed within explanted arteries and subjected to vascular motion along with pulsatile flow conditions. Following 30 min and 24 h, the arteries were removed, and paclitaxel levels were measured. Scanning electron microscopy was also performed to evaluate the stent surface. Arterial paclitaxel levels of the stent-treated arteries were found to be higher at 30 min than at 24 h following pulsatile and no vascular motion and even higher at 24 h following pulsatile flow and vascular motion. The residual drug on the stent significantly decreased from 30 min to 24 h. Scanning electron microscopy confirmed the loss of paclitaxel coating at 24 h and greater disturbance in stents under peripheral motion versus pulsatile only. This system represents the first ex vivo system to determine the PK of drug-eluting stents under physiological flow and vascular motion conditions. This work provides a novel system for a quick and inexpensive preclinical tool to study acute drug tissue concentration kinetics of drug-releasing interventional vascular devices designed for peripheral applications.
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Affiliation(s)
- Danyi Chen
- Wake Forest UniversityDepartment of EngineeringWinston‐SalemNorth CarolinaUSA
| | - Colin Krinsky
- Wake Forest UniversityDepartment of EngineeringWinston‐SalemNorth CarolinaUSA
| | - Mollie Phillips
- Wake Forest UniversityDepartment of EngineeringWinston‐SalemNorth CarolinaUSA
| | - Catherine Allred
- Wake Forest UniversityDepartment of EngineeringWinston‐SalemNorth CarolinaUSA
| | - Ava Khan
- Wake Forest UniversityDepartment of EngineeringWinston‐SalemNorth CarolinaUSA
| | - Linda B. Liu
- Wake Forest UniversityDepartment of EngineeringWinston‐SalemNorth CarolinaUSA
| | - Uwe Christians
- iC42 Clinical Research and DevelopmentUniversity of ColoradoAuroraColoradoUSA
| | - Saami K. Yazdani
- Wake Forest UniversityDepartment of EngineeringWinston‐SalemNorth CarolinaUSA
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Bianchini Massoni C, Strozzi F, Epifani E, Zenunaj G, Ucci A, Paladini I, Gasbarro V, Tusini N, Freyrie A. Real-world outcomes of Cook Zilver PTX in femoro-popliteal district from multicenter experience. INT ANGIOL 2023; 42:9-18. [PMID: 36534022 DOI: 10.23736/s0392-9590.22.04959-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND The purpose is to evaluate the follow-up outcomes after femoro-popliteal stenting with Cook Zilver PTX in a multicenter experience. METHODS Collected data from four Units were retrospectively joined and analyzed considering Zilver PTX deployed from August 2009 according to the instruction for use. Patient demographics, preoperative comorbidities, Rutherford classification, arterial characteristics and stent data were considered. Target lesion revascularization (TLR) was defined as reintervention performed for ≥50% diameter stenosis after recurrent clinical symptoms. Primary outcome was the freedom from TLR (ffTLR) and its risk factors. Secondary outcomes were primary patency (PP) of the stent, amputation-free survival (AFS) and their risk factors. RESULTS Considering 203 patients (mean age: 73.5 years ±10.6; male: 66.5%) and 263 stents (median 2 stents/patient, range 1-5stent/patient), chronic limb-threatening ischemia (CLTI) affected 154 patients (75.9%). The length of the treated lesion was <120 mm in 99 (48.8%), ≥120 mm and <200 mm in 65 (32%) and ≥200 mm in 39 (19.2%) cases, respectively; the reference vessel mean diameter was 5.5±0.7 mm; chronic total occlusion was treated in 153 (75.4%) patients, the popliteal artery was involved in 56 (27.6%) cases and prior endovascular intervention was performed in 27 (13.3%) cases. Two or more crural run-off vessels were patent in 124 (61.1%). Mean follow-up was 23.2 months ±21.3. At 1, 2 and 3 years, the ffTLR was 90.6±4.2%, 86.4±6.1% and 80.4±8.3%, respectively, and the PP was 85.6±5.0%, 74.2±7.6% and 72.7±8.2%, respectively. Negative prognostic factor for ffTLR and PP was the reference vessel diameter (P=0.001 and P<0.001, respectively). At 1, 2 and 3 years, the AFS was 81.8±6.0%, 75.5±7.1% and 74.2±7.5% respectively; coronary artery disease (P=0.041) and CLTI (P=0.011) resulted negative prognostic factors. CONCLUSIONS In the real-world practice, around 3/4 of patients were treated for CLTI. The rate of ffTLR is high, and PP is substantially lower. A small vessel diameter (<5 mm) is a negative factor for both ffTLR and PP. The rate of AFS is about 75% at 2 years and CLTI and coronary artery disease are negative prognostic factors.
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Affiliation(s)
- Claudio Bianchini Massoni
- Unit of Vascular Surgery, Department of Medicine and Surgery, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy -
| | - Francesco Strozzi
- Unit of Vascular Surgery, Department of General and Specialist Surgery, Arcispedale S. Maria Nuova, Reggio Emilia, Italy
| | - Enrico Epifani
- Unit of Radiology, Diagnostic Department, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
| | - Gladiol Zenunaj
- Unit of Vascular Surgery, Department of Surgery, Azienda Ospedaliero-Universitaria di Ferrara, Ferrara, Italy
| | - Alessandro Ucci
- Unit of Vascular Surgery, Department of Medicine and Surgery, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
| | - Ilaria Paladini
- Unit of Radiology, Diagnostic Department, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
| | - Vincenzo Gasbarro
- Unit of Vascular Surgery, Department of Surgery, Azienda Ospedaliero-Universitaria di Ferrara, Ferrara, Italy
| | - Nicola Tusini
- Unit of Vascular Surgery, Department of General and Specialist Surgery, Arcispedale S. Maria Nuova, Reggio Emilia, Italy
| | - Antonio Freyrie
- Unit of Vascular Surgery, Department of Medicine and Surgery, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
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Wearable and implantable devices for drug delivery: Applications and challenges. Biomaterials 2022; 283:121435. [DOI: 10.1016/j.biomaterials.2022.121435] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 01/26/2022] [Accepted: 02/17/2022] [Indexed: 12/19/2022]
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Li L, Liu S, Tan J, Wei L, Wu D, Gao S, Weng Y, Chen J. Recent advance in treatment of atherosclerosis: Key targets and plaque-positioned delivery strategies. J Tissue Eng 2022; 13:20417314221088509. [PMID: 35356091 PMCID: PMC8958685 DOI: 10.1177/20417314221088509] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Atherosclerosis, a chronic inflammatory disease of vascular wall, is a progressive pathophysiological process with lipids oxidation/depositing initiation and innate/adaptive immune responses. The coordination of multi systems covering oxidative stress, dysfunctional endothelium, diseased lipid uptake, cell apoptosis, thrombotic and pro-inflammatory responding as well as switched SMCs contributes to plaque growth. In this circumstance, inevitably, targeting these processes is considered to be effective for treating atherosclerosis. Arriving, retention and working of payload candidates mediated by targets in lesion direct ultimate therapeutic outcomes. Accumulating a series of scientific studies and clinical practice in the past decades, lesion homing delivery strategies including stent/balloon/nanoparticle-based transportation worked as the potent promotor to ensure a therapeutic effect. The objective of this review is to achieve a very brief summary about the effective therapeutic methods cooperating specifical targets and positioning-delivery strategies in atherosclerosis for better outcomes.
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Affiliation(s)
- Li Li
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, PR China
| | - Sainan Liu
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, PR China
| | - Jianying Tan
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, PR China
| | - Lai Wei
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, PR China
| | - Dimeng Wu
- Chengdu Daxan Innovative Medical Tech. Co., Ltd., Chengdu, PR China
| | - Shuai Gao
- Chengdu Daxan Innovative Medical Tech. Co., Ltd., Chengdu, PR China
| | - Yajun Weng
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, PR China
| | - Junying Chen
- Key Laboratory of Advanced Technology of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, PR China
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Lysenko ER, Burov AI, Griaznov OG, Bushueva EV. [Use of endovascular drug-coated devices in lesions of femoropopliteoltibial arteries]. ANGIOLOGII︠A︡ I SOSUDISTAI︠A︡ KHIRURGII︠A︡ = ANGIOLOGY AND VASCULAR SURGERY 2021; 27:165-172. [PMID: 34528602 DOI: 10.33529/angiq2021305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Endovascular intervention is one of the main methods of treatment in atherosclerotic lesions of the infrainguinal segment in patients with chronic lower limb ischaemia. Recent years have witnessed active use of drug-eluting techniques, significantly improving the long-term outcomes of peripheral reconstructions. This article is a review of publications on the results of using modern drug-eluting balloon catheters and stents in the femoropopliteoltibial position. The accumulated data will help solve the main problems of the classic balloon angioplasty, reducing the incidence of restenosis, improving primary patency, and decreasing the need for repeat interventions in the remote period of follow-up.
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Affiliation(s)
- E R Lysenko
- Department of Vascular Surgery, Centre of Cardiovascular and Endovascular Surgery, Federal Clinical Centre of High Medical Technologies of the Federal Medical and Biological Agency of the RF Ministry of Public Health, Khimki, Russia
| | - A Iu Burov
- Department of Vascular Surgery, Centre of Cardiovascular and Endovascular Surgery, Federal Clinical Centre of High Medical Technologies of the Federal Medical and Biological Agency of the RF Ministry of Public Health, Khimki, Russia
| | - O G Griaznov
- Department of Vascular Surgery, Centre of Cardiovascular and Endovascular Surgery, Federal Clinical Centre of High Medical Technologies of the Federal Medical and Biological Agency of the RF Ministry of Public Health, Khimki, Russia
| | - E V Bushueva
- Department of Vascular Surgery, Centre of Cardiovascular and Endovascular Surgery, Federal Clinical Centre of High Medical Technologies of the Federal Medical and Biological Agency of the RF Ministry of Public Health, Khimki, Russia
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Huizing E, Kum S, Ipema J, Varcoe RL, Shah AP, de Vries JPP, Ünlü Ç. Mid-term outcomes of an everolimus-eluting bioresorbable vascular scaffold in patients with below-the-knee arterial disease: A pooled analysis of individual patient data. Vasc Med 2021; 26:195-199. [PMID: 33507844 DOI: 10.1177/1358863x20977907] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Previous studies on everolimus-eluting bioresorbable vascular scaffolds (BVS) have shown promising 1-year primary patency rates in infrapopliteal arteries. Literature from large cohorts on long-term outcomes with the infrapopliteal Absorb BVS (Abbott Vascular) is lacking. The aim of this study is to pool published and unpublished data to provide a more precise estimate of the 24-month outcomes of Absorb BVS for the treatment of infrapopliteal disease. For the pooled analysis, updated original and newly collected data from three cohorts on treatment with the Absorb BVS for de novo infrapopliteal lesions were combined. The primary endpoint was freedom from restenosis. Secondary endpoints were freedom from clinically driven target lesion revascularization (CD-TLR), major amputation and survival. The pooled analysis included a total of 121 patients with 161 lesions, treated with 189 Absorb BVS in 126 limbs. The mean age of the patients was 73 years, 57% had diabetes mellitus, and 75% were classified as Rutherford-Becker class 5 or 6. Of the 161 lesions, 101 (63%) were calcified and 36 (22%) were occlusions. Successful deployment was achieved with all scaffolds. Freedom from restenosis was 91.7% and 86.6% at 12 and 24 months, respectively, and freedom from CD-TLR was 97.2% and 96.6%. Major amputation occurred in 1.6% of the limbs. Overall survival was 85% at 24 months. In conclusion, this pooled analysis represents the largest reported analysis of mid-term results of the Absorb BVS for the management of chronic limb-threatening ischemia. At 24 months, the Absorb BVS was safe with promising clinical outcomes for the treatment of infrapopliteal disease.
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Affiliation(s)
- Eline Huizing
- Department of Surgery, Northwest Clinics, Alkmaar, The Netherlands
| | - Steven Kum
- Vascular Service, Department of Surgery, Changi General Hospital, Singapore
| | - Jetty Ipema
- Department of Surgery, Northwest Clinics, Alkmaar, The Netherlands
| | - Ramon L Varcoe
- Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.,Department of Surgery, Prince of Wales Hospital, Sydney, NSW, Australia
| | - Atman P Shah
- Section of Cardiology, University of Chicago, Chicago, IL, USA
| | - Jean-Paul Pm de Vries
- Department of Surgery, Division of Vascular Surgery, University Medical Centre Groningen, Groningen, The Netherlands
| | - Çağdaş Ünlü
- Department of Surgery, Northwest Clinics, Alkmaar, The Netherlands
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Bunch F, Nair P, Aggarwala G, Dippel E, Kassab E, Khan MA, LeCroy C, McClure JM, Tolleson T, Walker C. A universal drug delivery catheter for the treatment of infrapopliteal arterial disease using liquid therapy. Catheter Cardiovasc Interv 2020; 96:393-401. [PMID: 32017374 PMCID: PMC7496530 DOI: 10.1002/ccd.28739] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 11/20/2019] [Accepted: 01/11/2020] [Indexed: 11/08/2022]
Abstract
OBJECTIVE The objective of this study was to investigate the safety and feasibility of treating infrapopliteal lesions using a novel drug delivery catheter locally delivering liquid paclitaxel. BACKGROUND Balloon angioplasty is currently the Gold Standard to treat below-the-knee disease; however, restenosis continues to be a great challenge following these percutaneous revascularization procedures. METHODS The Occlusion Perfusion Catheter for Optimal Delivery of Paclitaxel for the Prevention of Endovascular Restenosis (COPPER-A) study-Below-the-Knee Cohort was a prospective, nonrandomized, multicenter, feasibility, and safety study that enrolled 35 patients at 11 participating sites. The safety endpoints at 1, 3, and 6 months were freedom from thrombosis, major amputation in the target limb and target limb related death. The efficacy endpoints were primary patency and freedom from clinically driven target lesion revascularization at 6 months. RESULTS All patients tolerated the procedure well with no reports of adverse procedural events. Thirty-five patients were treated with a mean lesion length of 112 ± 81.2 mm with the lesion length range of 20-286 mm. At 6-month follow-up, primary patency was 89.3% and freedom from clinically driven target lesion revascularization was 96.4%. No patients demonstrated thrombosis, major amputation in the target limb and target limb related death at the 1-, 3- and 6-months follow-up intervals. CONCLUSIONS The results of this multi-center study demonstrated that infrapopliteal arteries can be safely and effectively treated with liquid paclitaxel using the occlusion perfusion catheter.
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Affiliation(s)
- Frank Bunch
- Interventional Cardiology and Peripheral Vascular Disease, South Baldwin Regional Medical Center, Foley, Alabama
| | - Pradeep Nair
- Interventional Cardiology and Peripheral Vascular Disease, Cardiovascular Institute of the South, Houma, Louisiana
| | - Gaurav Aggarwala
- Interventional Cardiology and Peripheral Vascular Disease, Pulse Physician Organization, Huntsville, Texas
| | - Eric Dippel
- Interventional Cardiology and Peripheral Vascular Disease, Vascular Institute of the Midwest, Davenport, Iowa
| | - Elias Kassab
- Interventional Cardiology and Peripheral Vascular Disease, Michigan Outpatient Vascular Institute, Dearborn, Michigan
| | - Muhammad A Khan
- Interventional Cardiology and Peripheral Vascular Disease, North Dallas Research Associates, Cardiac Center of Texas, McKinney, Texas
| | - Christopher LeCroy
- Department of Vascular Surgery, Coastal Vascular & Interventional, Peripheral Vascular Disease, Pensacola, Florida
| | - John M McClure
- Interventional Cardiology and Peripheral Vascular Disease, Mid-Michigan Heart and Vascular Center, Saginaw, Michigan
| | - Thaddeus Tolleson
- Interventional Cardiology and Peripheral Vascular Disease, Tyler Cardiovascular Consultants, Tyler, Texas
| | - Craig Walker
- Interventional Cardiology and Peripheral Vascular Disease, Cardiovascular Institute of the South, Houma, Louisiana
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Spiliopoulos S, Vasiniotis Kamarinos N, Brountzos E. Current evidence of drug-elution therapy for infrapopliteal arterial disease. World J Cardiol 2019; 11:13-23. [PMID: 30705739 PMCID: PMC6354073 DOI: 10.4330/wjc.v11.i1.13] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/23/2018] [Accepted: 01/01/2019] [Indexed: 02/06/2023] Open
Abstract
New and sophisticated endovascular devices, such as drug-eluting stents (DES) and drug-coated balloons (DCB), provide targeted drug delivery to affected vessels. The invention of these devices has made it possible to address the reparative cascade of arterial wall injury following balloon angioplasty that results in restenosis. DESs were first used for the treatment of infrapopliteal lesions almost 20 years ago. More recently, however, DCB technology is being investigated to improve outcomes of endovascular below-the-knee arterial procedures, avoiding the need for a metallic scaffold. Today, level IA evidence supports the use of infrapopliteal DES for short to medium length lesions, although robust evidence that justifies the use of DCBs in this anatomical area is missing. This review summarizes and discusses all available data on infrapopliteal drug-elution devices and highlights the most promising future perspectives.
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Affiliation(s)
- Stavros Spiliopoulos
- 2nd Radiology Department, Interventional Radiology Unit, University of Athens, Attikon University General Hospital, Athens 12461, Greece
| | - Nikiforos Vasiniotis Kamarinos
- 2nd Radiology Department, Interventional Radiology Unit, University of Athens, Attikon University General Hospital, Athens 12461, Greece
| | - Elias Brountzos
- 2nd Radiology Department, Interventional Radiology Unit, University of Athens, Attikon University General Hospital, Athens 12461, Greece
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Ding Y, Zhou M, Wang Y, Cai L, Shi Z. Comparison of Drug-Eluting Stent with Bare-Metal Stent Implantation in Femoropopliteal Artery Disease: A Systematic Review and Meta-Analysis. Ann Vasc Surg 2018. [PMID: 29514049 DOI: 10.1016/j.avsg.2017.12.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
BACKGROUND This study aimed to perform a systematic review and meta-analysis of current evidence comparing the drug-eluting stent (DES) with the bare-metal stent (BMS) in the treatment of femoropopliteal artery disease (FPAD). METHODS All relevant articles reporting the results of DES versus BMS implantation in FPAD were systematically searched in MEDLINE, EMBASE, and Cochrane database. Randomized controlled trial (RCT), cohort, and retrospective study were all included. The efficacy end points included late lumen loss (LLL), binary restenosis, primary patency rate, freedom from target lesion revascularization (TLR), and stent fracture. Related data of the follow-up outcomes were extracted and pooled. For each end point, odds ratios (ORs) and 95% confidence intervals (CIs) were calculated. RESULTS A total of 9 studies with 776 patients were included in this meta-analysis. There was no statistically significant difference between the DES and BMS groups in terms of LLL at 6 months (standard mean difference = -0.37, P = 0.07); binary restenosis at 6, 12, and 24 months (OR = 0.44, P = 0.20; OR = 0.75, P = 0.74; and OR = 0.62, P = 0.36; respectively); primary patency rate at 6, 12, and 24 months (OR = 1.18, P = 0.73; OR = 1.43, P = 0.70; OR = 1.25, P = 0.68, respectively); freedom from TLR at 12 months (OR = 1.13, P = 0.79); and stent fracture at 6 months (OR = 1.67, P = 0.38). A sensitivity analysis demonstrated that there was a significant benefit in the DES group over the BMS group in binary restenosis at 6 months (OR = 0.22, P = 0.008) after excluding a retrospective study, whereas no significant difference was observed when eliminating any other study. A subgroup analysis did not reveal any significant difference between a subgroup (sirolimus-eluting stent or paclitaxel-eluting stent) and the BMS group in FPAD. CONCLUSIONS According to current evidence, DES was not superior to BMS in the treatment of FPAD. Further larger RCTs are needed to provide more evidence in the comparison between DES and BMS for FPAD.
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Affiliation(s)
- Yong Ding
- Department of Vascular Surgery, Zhongshan Hospital, Institute of Vascular Surgery, Fudan University, Shanghai, China
| | - Min Zhou
- Department of Vascular Surgery, Zhongshan Hospital, Institute of Vascular Surgery, Fudan University, Shanghai, China
| | - Yonggang Wang
- Department of Vascular Surgery, Souzhou Municipal Hospital, Suzhou City, China
| | - Liang Cai
- Department of Vascular Surgery, Zhongshan Hospital, Institute of Vascular Surgery, Fudan University, Shanghai, China
| | - Zhenyu Shi
- Department of Vascular Surgery, Zhongshan Hospital, Institute of Vascular Surgery, Fudan University, Shanghai, China.
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Bunch F, Walker C, Kassab E, Carr J. A universal drug delivery catheter for the treatment of infrapopliteal arterial disease: Results from the multi-center first-in-human study. Catheter Cardiovasc Interv 2017; 91:296-301. [PMID: 28707423 DOI: 10.1002/ccd.27176] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 04/26/2017] [Accepted: 06/08/2017] [Indexed: 01/30/2023]
Abstract
OBJECTIVE The objective of this study was to assess the feasibility, safety and initial efficacy of paclitaxel administration using a novel drug delivery catheter for the prevention of restenosis in infrapopliteal de novo and restenotic lesions. BACKGROUND Restenosis continues to be a great challenge after percutaneous revascularization procedures for peripheral arterial disease, particularly for below-the-knee applications. METHODS A prospective, multicenter first-in-human registry of a novel delivery catheter delivering liquid paclitaxel was conducted in 10 patients. The primary efficacy endpoint at 6 months was freedom from clinically driven target lesion revascularization (CD-TLR) and the primary safety endpoint at 1, 3, and 6 months were thrombosis, major amputation in the target limb and target limb related death. RESULTS All patients tolerated the procedure well with no reports of adverse procedural events. Twelve (n = 12) lesions in ten patients were treated with a mean lesion length of 83.3 ± 49.2 mm, with the lesion length range of 30mm to 182 mm. At 6-month follow-up, the rate of CD-TLR was 30% (3 of 10 patients). Zero patients (0 out of 10) demonstrated thrombosis, major amputation in the target limb and target limb related death at the 1, 3, and 6 month follow-up intervals. CONCLUSIONS This first in-human experience obtained in a multicenter study of real-world de novo and restenotic lesions demonstrates a favorable safety and efficacy profile at 6 months. Randomized comparison to current drug coated balloons should be performed to further validate this approach and positive experience.
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Affiliation(s)
- Frank Bunch
- Cardiology Associates, Interventional Cardiologist and Peripheral Interventionalist, 188 Hospital Drive, Suite 100, Fairhope, AL, 36532
| | - Craig Walker
- Cardiovascular Institute of the South, President and Founder, Interventional Cardiologist and Peripheral Interventionalist, 225 Dunn Street, Houma, LA, 70360
| | - Elias Kassab
- Michigan Outpatient Vascular Institute, Interventional Cardiologist and Peripheral Interventionalist, 5500 Auto Club Drive, Dearborn, MI, 48126
| | - Jeffrey Carr
- Cardiovascular Associates of East Texas, Interventional Cardiologist and Peripheral Interventionalist, 1783 Troup Hwy, Tyler, TX, 75701
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Muhs BE, Gagne PJ, Maldonado T, Sheehan P. Minimally Invasive Revascularization Strategies for Chronic Lower Limb Ischemia. INT J LOW EXTR WOUND 2016; 5:35-9. [PMID: 16543211 DOI: 10.1177/1534734606286473] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Lower extremity wounds resulting from ischemia are increasingly becoming a common indication for surgical revascularization. Techniques in minimally invasive vascular surgery for the treatment of lower extremity chronic ischemia have expanded rapidly in recent years. The current standard of care with which all new modalities should be compared is the restoration of arterial flow via direct arterial revascularization using the autogenous reversed saphenous vein that can yield limb salvage rates of approximately 95%. Percutaneous transluminal angioplasty and stenting (PTA/S), cryoplasty, catheter-directed atherectomy, laser-assisted PTA/S, drug-eluting stents, and subintimal angioplasty are emerging minimally invasive modalities used for the treatment of lower extremity ischemia. Early success rates using many of these techniques have been promising. The outcomes of randomized controlled trials with long-term follow-ups are needed to make confident remarks about the effectiveness of these techniques.
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Affiliation(s)
- Bart E Muhs
- Division of Vascular Surgery, New York University School of Medicine, New York, NY 10016, USA.
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Drug delivering technology for endovascular management of infrainguinal peripheral artery disease. JACC Cardiovasc Interv 2016; 7:827-39. [PMID: 25147028 DOI: 10.1016/j.jcin.2014.05.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 04/07/2014] [Accepted: 05/08/2014] [Indexed: 11/21/2022]
Abstract
Endovascular intervention has become a well-recognized treatment modality for peripheral artery disease; however, mid- and long-term outcomes have been plagued by limited durability. Plain balloon angioplasty and bare-metal stents have historically suffered from high restenosis rates leading to the need for frequent repeat revascularization procedures. The innovation of locally administered, drug-delivering balloons and stents has been a direct result of technological innovations directed toward prevention and treatment of this limitation. Over the last 5 years, numerous clinical trials investigating the use of drug-coated stents and drug-coated balloons indicate a significant improvement in endovascular treatment durability and outcomes. This review provides an up-to-date assessment of the current evidence for the use of drug-coated stents and drug-coated balloons in the treatment of femoropopliteal and infrapopliteal peripheral artery disease. Additionally, it provides an overview of the development of this technology, highlights landmark ongoing and completed clinical trials, examines evidence to support the use of drug-coated technologies in combination with other modalities, and examines promising new technological developments. Last, it summarizes the challenges and safety concerns that have delayed U.S. Food and Drug Administration approval of these devices.
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Vogl TJ, Bodelle B. Vascular Interventional Therapy. Diagn Interv Radiol 2016. [DOI: 10.1007/978-3-662-44037-7_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Vannozzi L, Ricotti L, Filippeschi C, Sartini S, Coviello V, Piazza V, Pingue P, La Motta C, Dario P, Menciassi A. Nanostructured ultra-thin patches for ultrasound-modulated delivery of anti-restenotic drug. Int J Nanomedicine 2015; 11:69-91. [PMID: 26730191 PMCID: PMC4694686 DOI: 10.2147/ijn.s92031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
This work aims to demonstrate the possibility to fabricate ultra-thin polymeric films loaded with an anti-restenotic drug and capable of tunable drug release kinetics for the local treatment of restenosis. Vascular nanopatches are composed of a poly(lactic acid) supporting membrane (thickness: ~250 nm) on which 20 polyelectrolyte bilayers (overall thickness: ~70 nm) are alternatively deposited. The anti-restenotic drug is embedded in the middle of the polyelectrolyte structure, and released by diffusion mechanisms. Nanofilm fabrication procedure and detailed morphological characterization are reported here. Barium titanate nanoparticles (showing piezoelectric properties) are included in the polymeric support and their role is investigated in terms of influence on nanofilm morphology, drug release kinetics, and cell response. Results show an efficient drug release from the polyelectrolyte structure in phosphate-buffered saline, and a clear antiproliferative effect on human smooth muscle cells, which are responsible for restenosis. In addition, preliminary evidences of ultrasound-mediated modulation of drug release kinetics are reported, thus evaluating the influence of barium titanate nanoparticles on the release mechanism. Such data were integrated with quantitative piezoelectric and thermal measurements. These results open new avenues for a fine control of local therapies based on smart responsive materials.
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Affiliation(s)
- Lorenzo Vannozzi
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy
| | - Leonardo Ricotti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy
| | - Carlo Filippeschi
- Center for MicroBioRobotics at SSSA, Istituto Italiano di Tecnologia, Pontedera, Italy
| | | | - Vito Coviello
- Department of Pharmacy, University of Pisa, Pisa, Italy
| | - Vincenzo Piazza
- Center for Nanotechnology Innovation at NEST, Istituto Italiano di Tecnologia, Pisa, Italy
| | | | | | - Paolo Dario
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy
| | - Arianna Menciassi
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy
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Chow CL, Scott P, Farouque O, Clark DJ. Drug-coated balloons: a novel advance in the percutaneous treatment of coronary and peripheral artery disease. Interv Cardiol 2015. [DOI: 10.2217/ica.15.4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Bastijanic JM, Etscheidt J, Sattiraju M, Bonsignore C, Kopchok G, White R, Sarac TP. Fatigue and in vivo validation of a peritoneum-lined self-expanding nitinol stent-graft. J Endovasc Ther 2014; 21:735-46. [PMID: 25290804 DOI: 10.1583/14-4762.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE To assess the fatigue and in vivo performance of a new stent-graft incorporating bovine peritoneum lining that is designed for application in peripheral vascular occlusive disease. METHODS Bovine peritoneum-lined stent-grafts were subjected to accelerated in vitro pulsatile fatigue and axial/torsional fatigue testing designed to simulate 10 years of physiological strain on the devices. At specified times the devices were evaluated for stent fracture, suture failure, or tissue tearing. Seven dogs underwent bilateral common iliac artery (CIA) balloon angioplasty injury with unilateral placement of the peritoneum-lined stent-graft. Angiography and intravascular ultrasound were performed prior to treatment, after treatment, and prior to sacrifice at 30 days. Vessels were perfusion fixed and histologically evaluated at 5 regions: above stent, proximal stent, mid stent, distal stent, and below stent. RESULTS No evidence of stent, suture, or tissue failure was present during or after pulsatile and axial/torsional fatigue testing. At 30±0.3 days after implantation, all vessels were patent. The average lumen area at explantation across stented vessels was 25.45 mm(2). Lumen areas tended to be reduced above (23.57 mm(2)) and below (24.17 mm(2)) the stent. Lumen areas were consistent across stented regions at explantation (proximal stent 27.80 mm(2), mid stent 25.88 mm(2), and distal stent 25.81 mm(2)). The mean neointimal area in peritoneum-lined stents was 2.02±1.52 mm(2), with a neointima:media ratio of 1.03±0.50. These values were significantly lower in the above and below stent areas than in the stented regions, but there was no difference in either measure within the proximal, mid, or distal stent. CONCLUSION The custom-designed peritoneum-lined stent-graft is promising for clinical peripheral applications due to its ability to resist relevant long-term physiological stresses and outstanding short-term patency rates in canine implantations.
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Pastromas G, Katsanos K, Krokidis M, Karnabatidis D, Spiliopoulos S. Emerging stent and balloon technologies in the femoropopliteal arteries. ScientificWorldJournal 2014; 2014:695402. [PMID: 24672355 PMCID: PMC3932206 DOI: 10.1155/2014/695402] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/31/2013] [Indexed: 02/05/2023] Open
Abstract
Endovascular procedures for the management of the superficial femoral (SFA) and popliteal artery disease are increasingly common. Over the past decade, several stent technologies have been established which may offer new options for improved clinical outcomes. This paper reviews the current evidence for SFA and popliteal artery angioplasty and stenting, with a focus on randomized trials and registries of nitinol self-expanding stents, drug-eluting stents, dug-coated balloons, and covered stent-grafts. We also highlight the limitations of the currently available data and the future routes in peripheral arterial disease (PAD) stent and balloon technology.
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Affiliation(s)
- Georgios Pastromas
- Department of Interventional Radiology, Patras University Hospital, 26504 Patras, Greece
| | - Konstantinos Katsanos
- Department of Interventional Radiology, Guy's and St. Thomas' Hospitals, NHS Foundation Trust, London SE1 7EH, UK
- Department of Imaging Sciences Biomedical Engineering, School of Medicine, King's College, London WC2R 2LS, UK
| | - Miltiadis Krokidis
- Department of Radiology, Addenbrooke's Hospital, NHS Foundation Trust, Cambridge CB2 0QQ, UK
| | - Dimitrios Karnabatidis
- Department of Interventional Radiology, Patras University Hospital, 26504 Patras, Greece
| | - Stavros Spiliopoulos
- Department of Interventional Radiology, Patras University Hospital, 26504 Patras, Greece
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A natural immune modulator attenuates stress hormone and catecholamine concentrations in polymicrobial peritonitis. J Trauma Acute Care Surg 2013; 74:1411-8. [PMID: 23694866 DOI: 10.1097/ta.0b013e31829215b1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Activated hexose correlated compound (AHCC), derived from shiitake mushrooms, increases resistance to infection in immunocompromised hosts with positive effects on dendritic cells, natural killer cell function and interleukin 12 production. It may also be attenuating the systemic inflammatory response by regulating the secretion of cortisol and norepinephrine (NE). METHODS Female Swiss-Weber mice were pretreated with AHCC (Amino Up Chemical Co., Sapporo, Japan) or water by gavage for 10 days before undergoing cecal ligation and puncture (CLP). Peritoneal exudate cells and blood samples were harvested at 4 hours and 24 hours following CLP. Plasma and peritoneal concentrations of cortisol and NE were obtained using enzyme-linked immunosorbent assay. Peritoneal bacteria were quantified by colony counts after 4 hours and 24 hours. Significance was denoted by a p < 0.05. RESULTS Plasma and peritoneal cortisol concentrations were increased 4 hours after CLP compared with normal controls, with no difference between the pretreated groups. Concentrations of cortisol decreased from 4 hours to 24 hours after CLP with AHCC (plasma, p = 0.009; peritoneal, p < 0.001), and peritoneal cortisol at 24 hours was lower with AHCC as compared with water (p = 0.028). There was no change in plasma or peritoneal NE concentrations at 4 hours. At 24 hours, higher concentrations of NE were detected in both plasma and peritoneal fluid, with lower plasma concentrations in those gavaged with AHCC (p = 0.015). There was no significant difference in peritoneal bacteria counts. CONCLUSION Enhanced immune function observed with AHCC could be caused by attenuated concentrations of stress hormones and catecholamines.
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Nazneen F, Herzog G, Arrigan DW, Caplice N, Benvenuto P, Galvin P, Thompson M. Surface chemical and physical modification in stent technology for the treatment of coronary artery disease. J Biomed Mater Res B Appl Biomater 2012; 100:1989-2014. [DOI: 10.1002/jbm.b.32772] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Accepted: 06/20/2012] [Indexed: 12/12/2022]
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Goyal SN, Bharti S, Krishnamurthy B, Agrawal Y, Ojha SK, Arya DS. Impact of metabolic syndrome on re-stenosis development: role of drug-eluting stents. Diab Vasc Dis Res 2012; 9:177-88. [PMID: 22219135 DOI: 10.1177/1479164111430336] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Metabolic syndrome (MetS) is defined as a cluster of numerous cardiovascular risk factors, which encompasses obesity, dyslipidaemia, insulin resistance and hypertension. Patients with MetS are more prone to developing cardiovascular events than other patients. To date, several approaches such as physical exercise, dietary control and invasive and non-invasive therapeutic interventions for dyslipidaemia, hypertension and insulin resistance have been used to manage MetS. However, there is a progressive elevation in the incidence of fatal and non-fatal cardiovascular events due to the increased prevalence of obesity and diabetes. Percutaneous coronary intervention has emerged over the last few years as an effective revascularisation strategy for those with coronary artery disease, in parallel with the development of effective anti-platelet medications and newer drug-eluting stents. In recent years, considerable research efforts have been undertaken to elucidate the pathophysiology of re-stenosis and develop strategies to prevent re-stenosis following percutaneous transluminal coronary angioplasty and stent implantation. Although the rate of stent re-stenosis and target-lesion revascularisation has been reduced, there is little information in the literature on the outcome of MetS in the pathophysiology of re-stenosis. In this review article, we summarise the recent development and progress on re-stenosis and the role of drug-eluting stents, particularly in MetS.
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Affiliation(s)
- S N Goyal
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India
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21
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Karnabatidis D, Spiliopoulos S, Katsanos K, Siablis D. Below-the-knee drug-eluting stents and drug-coated balloons. Expert Rev Med Devices 2012; 9:85-94. [PMID: 22145843 DOI: 10.1586/erd.11.67] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Endovascular procedures have evolved to the mainstream treatment of choice for revascularization of infrapopliteal obstructive disease, especially in patients suffering from critical limb ischemia and multiple comorbidities. However, standard balloon angioplasty is limited by the potential of a suboptimal acute outcome due to elastic recoil and/or flow-limiting dissection, followed by neointimal hyperplasia and progressive vascular restenosis even in the case of bare-metal stent use. Drug-eluting stents and drug-coated balloons are emerging endovascular technologies with the promise of significant inhibition of vessel restenosis and improved clinical outcomes. The current review outlines the drug-eluting properties of those instruments and summarizes the currently available clinical data. The authors critically appraise the current status and also provide a glimpse of the near future of endovascular below-the-knee treatments.
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Affiliation(s)
- Dimitris Karnabatidis
- Department of Radiology, Angiography Suite, Patras University Hospital, Rion, Greece.
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22
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Yuan Z, Pei H, Roberts DJ, Zhang Z, Rowlan JS, Matsumoto AH, Shi W. Quantitative trait locus analysis of neointimal formation in an intercross between C57BL/6 and C3H/HeJ apolipoprotein E-deficient mice. ACTA ACUST UNITED AC 2010; 2:220-8. [PMID: 19718279 DOI: 10.1161/circgenetics.108.792499] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Inbred mouse strains C57BL/6J (B6) and C3H/HeJ (C3H) exhibit marked differences in neointimal formation after arterial injury when deficient in apolipoprotein E (apoE(-/-)) and fed a Western diet. Quantitative trait locus (QTL) analysis was performed on an intercross between B6.apoE(-/-) and C3H.apoE(-/-) mice to determine genetic factors contributing to the phenotype. METHODS AND RESULTS Female B6.apoE(-/-) mice were crossed with male C3H.apoE(-/-) mice to generate F(1)s, which were intercrossed to generate 204 male F(2) progeny. At 10 weeks of age, F(2)s underwent endothelium denudation injury to the left common carotid artery. Mice were fed a Western diet for 1 week before and 4 weeks after injury and analyzed for neointimal lesion size, plasma lipid and MCP-1 levels. One significant QTL, named Nih1 (61cM, LOD score: 5.02), on chromosome 12 and a suggestive locus on chromosome 13 (35cM, LOD: 2.67) were identified to influence lesion size. One significant QTL on distal chromosome 1 accounted for major variations in plasma non-HDL cholesterol and triglyceride levels. Four suggestive QTLs on chromosomes 1, 2, and 3 were detected for circulating MCP-1 levels. No correlations were observed between neointimal lesion size and plasma lipid levels or between lesion size and plasma MCP-1 levels. CONCLUSIONS Neointimal formation is controlled by genetic factors independent of those affecting plasma lipid levels and circulating MCP-1 levels in the B6 and C3H mouse model.
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Affiliation(s)
- Zuobiao Yuan
- Department of Radiology, University of Virginia, Charlottesville, VA 22908, USA
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24
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Vallières K, Petitclerc É, Laroche G. On the ability of imatinib mesylate to inhibit smooth muscle cell proliferation without delaying endothelialization: An in vitro study. Vascul Pharmacol 2009; 51:50-6. [DOI: 10.1016/j.vph.2009.02.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2008] [Revised: 01/29/2009] [Accepted: 02/13/2009] [Indexed: 01/08/2023]
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Karnabatidis D, Katsanos K, Siablis D. Infrapopliteal Stents:Overview and Unresolved Issues. J Endovasc Ther 2009; 16 Suppl 1:I153-62. [DOI: 10.1583/08-2593.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kraitzer A, Kloog Y, Zilberman M. Approaches for prevention of restenosis. J Biomed Mater Res B Appl Biomater 2008; 85:583-603. [PMID: 18098192 DOI: 10.1002/jbm.b.30974] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Coronary artery disease is characterized by a narrowing (stenosis) of the arteries that supply blood to the tissue of the heart. Continued restriction of blood flow manifests itself as angina and ultimately myocardial infarction (heart attack) for the patient. Heart bypass was once the only treatment for this condition, but over the years percutaneous coronary intervention (PCI) has become an increasingly attractive alternative to medical therapy and surgical revascularization for the treatment of coronary artery disease. A vascular stent is a medical device designed to serve as a temporary or permanent internal scaffold, to maintain or increase the lumen of a blood vessel. Metallic coronary stents were first introduced to prevent arterial dissections and to eliminate vessel recoil and intimal hyperplasia associated with PCI. Further advancement in the treatment of coronary artery disease is the development of drug-eluting stents that dramatically reduce the incidence of in-stent restenosis to less than 5%. Local drug delivery offers the advantages of allowing a relatively high local concentration of drug at the treatment site while minimizing systemic toxic effect. This review describes approaches for prevention of restenosis. It focuses on drugs for prevention of restenosis, bare metal stents, and drug-eluting stents. It also describes recent advances in bioresorbable stents. One of the chapters is dedicated to our novel composite bioresorbable drug-eluting fibers, designed to be used as basic elements in drug-eluting stents.
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Affiliation(s)
- Amir Kraitzer
- Department of Biomedical Engineering, Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel
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Kraitzer A, Ofek L, Schreiber R, Zilberman M. Long-term in vitro study of paclitaxel-eluting bioresorbable core/shell fiber structures. J Control Release 2008; 126:139-48. [DOI: 10.1016/j.jconrel.2007.11.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2007] [Revised: 11/13/2007] [Accepted: 11/16/2007] [Indexed: 10/22/2022]
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Saxon RR, Coffman JM, Gooding JM, Ponec DJ. Long-term Patency and Clinical Outcome of the Viabahn Stent-Graft for Femoropopliteal Artery Obstructions. J Vasc Interv Radiol 2007; 18:1341-9; quiz 1350. [DOI: 10.1016/j.jvir.2007.07.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Zähringer M, Pattynama PMT, Talen A, Sapoval M. Drug-eluting stents in renal artery stenosis. Eur Radiol 2007; 18:678-82. [PMID: 17929021 DOI: 10.1007/s00330-007-0789-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2007] [Revised: 08/14/2007] [Accepted: 09/13/2007] [Indexed: 11/29/2022]
Affiliation(s)
- M Zähringer
- Department of Radiology, Marienhospital Stuttgart, Böheimstr. 37, 70199, Stuttgart, Germany.
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30
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Kougias P, El Sayed HF, Zhou W, Lin PH. Management of chronic mesenteric ischemia. The role of endovascular therapy. J Endovasc Ther 2007; 14:395-405. [PMID: 17723025 DOI: 10.1583/07-2102.1] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chronic mesenteric ischemia is an uncommon disorder manifested most commonly as abdominal pain. Surgical revascularization has traditionally been the treatment of choice. Endovascular management of this entity was originally attempted as an alternative for high-risk patients. Improvements in stent technology, refinement in technique, and increased efficiency of antiplatelet regimens have, over time, increased the popularity of this minimally invasive approach. We present a review of the available series on endovascular treatment of chronic mesenteric ischemia, with emphasis on short- and long-term outcome and morbidity and mortality results. Principles of operative technique and controversial issues and topics of interest are also discussed.
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Affiliation(s)
- Panagiotis Kougias
- Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas 77030, USA.
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Schwarzmaier-D'Assie A, Karnik R, Bonner G, Vavrik J, Slany J. Fracture of a Drug-Eluting Stent in the Tibioperoneal Trunk Following Bifurcation Stenting. J Endovasc Ther 2007; 14:106-9. [PMID: 17291141 DOI: 10.1583/06-1893.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE To report a complication of stent placement at a bifurcation in the infrapopliteal arteries. CASE REPORT A 60-year-old man presented with a complex subtotal stenosis in the anterior tibial artery and the tibioperoneal trunk. Two drug-eluting stents were implanted by means of the crush technique, successfully recanalizing the trifurcation. One week later, the patient was readmitted with a thrombotic occlusion of the popliteal artery. Fluoroscopy showed a fracture of the larger stent in the tibioperoneal trunk. After successful local thrombolysis, a stent fragment was located in the popliteal artery and removed with an Amplatz snare. Long-term follow-up was uneventful. CONCLUSION Fracture may be a more common complication of bifurcation stenting when undertaken in a territory at high risk for this complication.
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Tepe G, Zeller T, Heller S, Wiskirchen J, Fischmann A, Coerper S, Balletshofer B, Beckert S, Claussen CD. Self-expanding nitinol stents for treatment of infragenicular arteries following unsuccessful balloon angioplasty. Eur Radiol 2006; 17:2088-95. [PMID: 17186245 DOI: 10.1007/s00330-006-0526-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2006] [Revised: 10/15/2006] [Accepted: 11/03/2006] [Indexed: 11/29/2022]
Abstract
The feasibility of self-expanding nitinol stents for treatment of infragenicular arteries following unsuccessful balloon angioplasty was assessed. Options for lower limb percutaneous revascularization are limited, especially for complex vessel obstruction. Depending on the lesion and the experience of the interventionalist, the failure rate of balloon angioplasty (PTA) ranges between 10 and 40%. Until recently, no self-expanding stent for the use in the infragenicular arteries was available. This is the first report of the results for 18 consecutive patients who received 4F sheath compatible self-expanding nitinol stents following unsuccessful PTA or early restenosis. Twenty-four stents were implanted in 21 lesions for various indications residual stenosis >50% due to heavy calcification, flow-limiting dissection, occluding thrombus resistant to thrombolyis, thrombaspiration, and PTA, and early restenosis after previous PTA. Stent implantation was feasible in all cases. No complications occurred. After the stent implantation, all primarily unsuccessful interventions could be transformed into successful procedures with no residual stenosis >30% in any case. After 6 +/- 2 months, two of the 18 patients died, and 14 of the 16 remaining patients improved clinically. At follow-up, the patency could be assessed in 14 stented arteries. Three stents were occluded, one stent showed some neointimal hyperplasia (50-70% restenosis), the remaining ten stents showed no restenosis (0-30%). The use of self-expanding nitinol stents in tibioperoneal and popliteal arteries is a safe and feasible option for the treatment of unsuccessful PTA. The 6-months patency is high.
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Affiliation(s)
- Gunnar Tepe
- Department of Diagnostic Radiology, University of Tuebingen, Hoppe-Seyler-Str. 3, 72076 Tuebingen, Germany.
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Ferreira M, Capotorto LF, Abuhadba G, Monteiro M, Lanziotti L. Recanalização da artéria femoral superficial com stents Zilver: técnica padronizada e análise retrospectiva de 3 anos. J Vasc Bras 2006. [DOI: 10.1590/s1677-54492006000400005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJETIVOS: Descrever a técnica de recanalização endovascular da artéria femoral superficial e fazer uma análise retrospectiva dos 3 primeiros anos da técnica. MÉTODOS: Análise retrospectiva dos pacientes tratados entre 2001 e 2004, visando obter as taxas de perviedade das recanalizações. A amostra considerada neste estudo consta de 79 artérias femorais superficiais recanalizadas em 61 pacientes, nos quais foram utilizados exclusivamente a técnica descrita e o mesmo modelo de stent de nitinol auto-expansível (Zilver, COOK). RESULTADOS: Dos 61 pacientes, 8% possuíam isquemia crítica de membro inferior e 92% apresentavam claudicação incapacitante refratária ao tratamento clínico. A melhora clínica foi observada e referida pelos pacientes numa relação direta à perviedade das recanalizações. A análise estatística demonstrou taxas acumuladas de perviedade primária assistida de 98, 91 e 84% em 12, 24 e 37 meses, respectivamente. As taxas de perviedade, entendida como fluxo continuado nas recanalizações, foram de 96, 93 e 93% em 12, 24 e 37 meses, respectivamente. CONCLUSÕES: Consideramos a técnica da recanalização da artéria femoral superficial um método ao mesmo tempo pouco invasivo, com reduzidas complicações e de consideráveis taxas de sucesso anatômico e perviedade, que, em conjunto, são capazes de proporcionar satisfação e qualidade de vida aos pacientes portadores de doença arterial obstrutiva periférica.
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Duda SH, Bosiers M, Lammer J, Scheinert D, Zeller T, Oliva V, Tielbeek A, Anderson J, Wiesinger B, Tepe G, Lansky A, Jaff MR, Mudde C, Tielemans H, Beregi JP. Drug-Eluting and Bare Nitinol Stents for the Treatment of Atherosclerotic Lesions in the Superficial Femoral Artery:Long-term Results From the SIROCCO Trial. J Endovasc Ther 2006; 13:701-10. [PMID: 17154704 DOI: 10.1583/05-1704.1] [Citation(s) in RCA: 338] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE To review clinical outcomes of patients with chronic limb ischemia and TASC type C lesions treated with sirolimus-eluting versus bare SMART nitinol self-expanding stents. METHODS Data were obtained from a randomized, multicenter, double-blinded study conducted in 2 phases. All 93 patients had chronic limb ischemia and superficial femoral artery (SFA) occlusions or stenoses (average lesion length 8.3 cm). In total, 47 patients (31 men; mean age 66.3+/-9.1 years, range 50-84) received the sirolimus-eluting SMART stent and 46 patients (36 men; mean age 65.9 +/-10.8 years, range 38-83) received a bare SMART nitinol stent. Both groups were followed for a mean 24 months. RESULTS Both the sirolimus-eluting and the bare SMART stents were effective in revascularizing the diseased SFA and in sustaining freedom from restenosis. For both types of stents, improvements in ankle-brachial indices (ABI) and symptoms of claudication were maintained over 24 months (median 24-month ABI 0.96 for the sirolimus group versus 0.87 for the bare stent group, p>0.05). At 24 months, the restenosis rate in the sirolimus group was 22.9% versus 21.1% in the bare stent group (p>0.05). The cumulative in-stent restenosis rates according to duplex ultrasound were 4.7%, 9.0%, 15.6%, and 21.9%, respectively, at 6, 9, 18, and 24 months; the rates did not differ significantly between the treatment groups. The TLR rate for the sirolimus group was 6% and for the bare stent group 13%; the TVR rates were somewhat higher: 13% and 22%, respectively. Mortality rates did not differ significantly between the groups. CONCLUSION These data demonstrate that the sirolimus-eluting and the bare SMART stent are effective, safe, and free from restenosis in a majority of patients for up to 24 months. Because the restenosis rate in the bare stent group is unexpectedly low, no significant difference could be found between the sirolimus-eluting and the bare SMART stents.
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Affiliation(s)
- Stephan H Duda
- Center for Diagnostic Radiology & Minimally Invasive Therapy, The Jewish Hospital Berlin, Heinz-Galinski-Strasse 1, 13347 Berlin, Germany.
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Abstract
High restenosis rate is still the major limitation of peripheral arterial interventions. Within the last years, drug-eluting stents have gained wide acceptance in the coronary arteries, however, these devices are not currently available for arteries outside the coronary vasculature. This article summarizes the special role of the superficial femoral artery in restenosis, with efforts being made to reduce the restenosis rate in this artery, focusing on stents and drug-eluting stents.
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Affiliation(s)
- Gunnar Tepe
- Department of Diagnostic Radiology, University of Tuebingen, Tuebingen, Germany.
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Carnevale K, Ouriel K, Gabriel Y, Clair D, Bena JF, Silva MB, Sarac TP. Biological coating for arterial stents: the next evolutionary change in stents. J Endovasc Ther 2006; 13:164-74. [PMID: 16643070 DOI: 10.1583/05-1710r.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE To describe the in vivo results of a promising new stent-graft lined with peritoneum. METHODS Eighteen dogs underwent balloon angioplasty injury to the bilateral iliac arteries followed by placement of either an 8-mm x 5-cm glutaraldehyde-fixed bovine peritoneum- lined balloon-expandable stent (PLS) or a similarly sized, commercially prepared, polyester-lined self-expanding stent (DLS) as a control. Animals were sacrificed at 1 and 6 months. Biplanar arteriography and intravascular ultrasound were done at the time of sacrifice, and the vessels were harvested after perfusion fixation for histology/morphometry. Immunofluorescence with CD34 and factor VIII staining was used to evaluate endothelialization, while alpha-actin was used to quantify smooth muscle cell (SMC) deposition. RESULTS At 1 month, all vessels were patent in both groups. At 6 months, 8 of 9 vessels were open in the PLS group versus 6 of 9 in the control DLS group. Vessel lumen diameter at 1 month was significantly greater in the PLS vessels compared to the DLS group at 1 cm above the stent (35.9 +/- 4.4 versus 29.4 +/- 4.7 mm2; p = 0.02) and 1 cm below the stent (37.2 +/- 7.1 versus 25.2 +/- 3.2 mm2; p = 0.005); these results persisted to 6 months. Histological morphometry demonstrated progression of neointimal hyperplasia in the DLS stent between 30 and 180 days (8.3 +/- 1.79 versus 14.9 +/- 6.6 mm2; p = 0.03), whereas the peritoneum-lined stent had no change during the same time period (4.62 +/- 0.98 versus 4.72 +/- 0.97 mm2; p = 0.85). The same patterns were true for the intima:media ratio. Immunohistochemistry demonstrated complete endothelialization at 6 months in both DLS and PLS. However, SMC staining with alpha-actin demonstrated more smooth muscle actin-positive cells in the DLS compared to the PLS (327 +/- 87 versus 262 +/- 73 counts/5 high-powered fields; p = 0.04). CONCLUSION Peritoneum-lined stents offer a novel method to improve patency of lower extremity arterial stents.
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Affiliation(s)
- Kevin Carnevale
- Department of Vascular Surgery, The Cleveland Clinic Lerner College of Medicine,Cleveland, Ohio 44195, USA
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Speck U, Scheller B, Abramjuk C, Breitwieser C, Dobberstein J, Boehm M, Hamm B. Neointima Inhibition: Comparison of Effectiveness of Non–Stent-based Local Drug Delivery and a Drug-eluting Stent in Porcine Coronary Arteries. Radiology 2006; 240:411-8. [PMID: 16864669 DOI: 10.1148/radiol.2402051248] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To compare the inhibition of neointimal proliferation by using non-stent-based local drug delivery and a drug-eluting stent in porcine coronary arteries. MATERIALS AND METHODS Experiments were conducted with permission of the animal protection committee of the local government. Paclitaxel was either dissolved in a nonionic contrast medium or coated on balloons. Stents were crimped on the coated balloons. Effectiveness was tested in 22 pigs. Two coronary stents were placed in each pig, and slight overstretch was applied. The animals were treated as follows: group A (control group), uncoated balloons, bare stents, and "plain" contrast medium; group B, same treatment as group A, but with paclitaxel in the contrast medium; group C, paclitaxel-coated balloons, with premounted bare stents and plain contrast medium; and group D, sirolimus-eluting stents, noncoated balloons, and plain contrast medium. Stenosis was assessed 4 weeks later at angiography and histomorphometry. For exploratory purposes, continuous variables of quantitative coronary angiography and histomorphometry were compared by using analysis of variance. RESULTS Results at follow-up angiography indicated a mean of 1.00 mm +/- 0.18 (standard deviation) lumen diameter loss in the control group and 0.14 mm +/- 0.18 loss in the group treated with the paclitaxel-coated balloon (group C; P < .001). Findings at histomorphometry confirmed the effectiveness of drug delivery, with the most impressive inhibition of neointimal proliferation from coated balloons-the neointimal area was 2.4 mm2 +/- 0.3 (P < .01 vs all other groups), compared with 5.2 mm2 +/- 0.3 in group A (control group), 4.3 mm2 +/- 0.3 in group B, and 3.8 mm2 +/- 0.3 in group D. CONCLUSION In spite of the short intima contact time, paclitaxel coated on the balloon inhibits neointimal formation in the porcine model of coronary stent placement.
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Affiliation(s)
- Ulrich Speck
- Department of Radiology, Charité Humboldt-University Berlin, Schumannstr 20-21, D 10117 Berlin, Germany.
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Tian J, Pei H, Sanders JM, Angle JF, Sarembock IJ, Matsumoto AH, Helm GA, Shi W. Hyperlipidemia is a major determinant of neointimal formation in LDL receptor-deficient mice. Biochem Biophys Res Commun 2006; 345:1004-9. [PMID: 16712797 DOI: 10.1016/j.bbrc.2006.04.180] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2006] [Accepted: 04/29/2006] [Indexed: 11/28/2022]
Abstract
LDL receptor-deficient (LDLR(-/-)) mice exhibit mild hyperlipidemia on a chow diet but develop severe hyperlipidemia on a high fat diet. In this study, we investigated neointimal formation after removal of the endothelium when LDLR(-/-) mice were fed chow or a Western diet containing 42% fat, 0.15% cholesterol, and 19.5% casein. At 10 weeks of age, female mice underwent endothelial denudation of the left common carotid artery. Two weeks after injury, neointimal formation was barely detectable in the injured vessel when mice developed mild hyperlipidemia on the chow diet. In contrast, neointimal lesions were obvious when mice developed severe hyperlipidemia on the Western diet. Immunohistochemical and histological analyses demonstrated the presence of macrophage foam cells and smooth muscle cells in neointimal lesions. The injured artery also exhibited a significant increase in medial area on the Western diet. Plasma levels of MCP-1 and soluble VCAM-1 were significantly elevated by feeding of the Western diet. These data indicate that hyperlipidemia aggravates neointimal growth in LDLR(-/-) mice by promoting foam cell formation and inflammation.
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Affiliation(s)
- Jing Tian
- Department of Radiology, University of Virginia, Charlottesville, VA 22908, USA
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Seo TS, Oh JH, Park YK, Song HY, Park SJ, Yuk SH. Efficacy of a dexamethasone-eluting nitinol stent on the inhibition of pseudo-intimal hyperplasia in a transjugular intrahepatic portosystemic shunt: an experimental study in a swine model. Korean J Radiol 2006; 6:241-7. [PMID: 16374082 PMCID: PMC2684971 DOI: 10.3348/kjr.2005.6.4.241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVE We wanted to evaluate the feasibility and efficacy of using a dexamethasone (DM)-eluting nitinol stent to inhibit the pseudo-intimal hyperplasia following stent placement in the transjugular intrahepatic portosystemic shunt tract (TIPS) of a swine. MATERIALS AND METHODS Fifteen stents were constructed using 0.15 mm-thick nitinol wire; they were 60 mm in length and 10 mm in diameter. The metallic stents were then classified into three types; type 1 and 2 was coated with the mixture of 12% and 20%, respectively, of DM solution and polyurethane (PU), while type 3 was a bare stent that was used for control study. In fifteen swine, each type of stent was implanted in the TIPS tract of 5 swine, and each animal was sacrificed 2 weeks after TIPS creation. The proliferation of the pseudo-intima was evaluated both on follow-up portogram and pathologic examination. RESULTS One TIPS case, using the type 1 stent, and two TIPS cases, using the type 2 stent, maintained their luminal patency while the others were all occluded. On the histopathologic analysis, the mean of the maximum pseudo-intimal hyperplasia was expressed as the percentage of the stent radius that was patent, and these values were 51.2%, 50% and 76% for the type 1, 2, and 3 stents, respectively. CONCLUSION The DM-eluting stent showed a tendency to reduce the development of pseudo-intimal hyperplasia in the TIPS tract of a swine model with induced-portal hypertension.
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Affiliation(s)
- Tae-Seok Seo
- Department of Diagnostic Radiology, Korea University Guro Hospital, Seoul, Korea
| | - Joo-Hyeong Oh
- Department of Diagnostic Radiology, Kyung Hee University Hospital, Seoul, Korea
| | - Young-Koo Park
- Department of Pathology, Kyung Hee University Hospital, Seoul, Korea
| | - Ho-Young Song
- Department of Radiology, University of Ulsan, College of Medicine, Seoul, Korea
| | - Sang Joon Park
- Department of Diagnostic Radiology, Hallym University, College of Medicine, Seoul, Korea
| | - Sun-Hong Yuk
- Department of Polymer Science and Engineering, Hannam University, Taejon, Korea
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Siablis D, Kraniotis P, Karnabatidis D, Kagadis GC, Katsanos K, Tsolakis J. Sirolimus-eluting versus bare stents for bailout after suboptimal infrapopliteal angioplasty for critical limb ischemia: 6-month angiographic results from a nonrandomized prospective single-center study. J Endovasc Ther 2006; 12:685-95. [PMID: 16363898 DOI: 10.1583/05-1620mr.1] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE To report the 6-month angiographic results from a prospective single-center study investigating the efficacy and outcome of sirolimus-eluting stents used for bailout after infrapopliteal revascularization of patients with critical limb ischemia (CLI). METHODS Twenty-nine patients (21 men; mean age 68.7 years) underwent infrapopliteal revascularization with bare metal stents (group B) implanted for bailout in 65 lesions (38 stenoses and 27 occlusions) in 40 infrapopliteal arteries. Another 29 patients (21 men; mean age 68.8 years) underwent infrapopliteal bailout stenting with sirolimus-eluting stents (group S) in 66 lesions (46 stenoses and 20 occlusions) in 41 vessels. Preliminary 6-month angiographic and clinical results were analyzed. RESULTS Hyperlipidemia and symptomatic cardiac and carotid diseases were more pronounced in group S (p<0.05). Technical success was 96.6% (28/29 limbs) in group B versus 100.0% in group S (p=0.16). Six-month primary patency was 68.1% in group B versus 92.0% in group S (p<0.002). Binary in-stent and in-segment restenosis rates were 55.3% and 66.0%, respectively, in patients with bare stents versus 4.0% and 32.0%, respectively, in patients treated with the sirolimus-eluting stents (both p<0.001). The target lesion re-intervention rate at 6 months was 17.0% in group B versus 4.0% in group S (p=0.02). Limb salvage was 100% in both groups. Six-month mortality and minor amputation rates were 6.9% and 17.2%, respectively, in group B versus 10.3% and 3.4%, respectively, in group S (p=0.32 and p=0.04, respectively). CONCLUSIONS Sirolimus-eluting stents seem to restrict neointimal hyperplasia in the infrapopliteal vascular bed.
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Affiliation(s)
- Dimitris Siablis
- Department of Radiology, Angiography Suite, University Hospital of Patras, Rion, Greece.
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Hirsch AT, Haskal ZJ, Hertzer NR, Bakal CW, Creager MA, Halperin JL, Hiratzka LF, Murphy WR, Olin JW, Puschett JB, Rosenfield KA, Sacks D, Stanley JC, Taylor LM, White CJ, White J, White RA, Antman EM, Smith SC, Adams CD, Anderson JL, Faxon DP, Fuster V, Gibbons RJ, Halperin JL, Hiratzka LF, Hunt SA, Jacobs AK, Nishimura R, Ornato JP, Page RL, Riegel B. ACC/AHA 2005 Guidelines for the Management of Patients With Peripheral Arterial Disease (Lower Extremity, Renal, Mesenteric, and Abdominal Aortic): A Collaborative Report from the American Association for Vascular Surgery/Society for Vascular Surgery,⁎Society for Cardiovascular Angiography and Interventions, Society for Vascular Medicine and Biology, Society of Interventional Radiology, and the ACC/AHA Task Force on Practice Guidelines (Writing Committee to Develop Guidelines for the Management of Patients With Peripheral Arterial Disease). J Am Coll Cardiol 2006. [DOI: 10.1016/j.jacc.2006.02.024] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Tepe G, Schmehl J, Heller S, Wiesinger B, Claussen CD, Duda SH. Superficial femoral artery: current treatment options. Eur Radiol 2006; 16:1316-22. [PMID: 16489440 DOI: 10.1007/s00330-005-0111-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2005] [Revised: 11/24/2005] [Accepted: 11/29/2005] [Indexed: 11/29/2022]
Abstract
Treatment of the superficial femoral artery (SFA) has been among the least effective of all endovascular procedures in terms of long-term patency. The relatively small vessel lumen, in conjunction with a high plaque burden, slow flow, and a high frequency of primary occlusions, contributes to a considerable rate of acute technical failures. Because of these technical limitations a much effort has been made during the past years. This manuscript should summarize the hopes and limitations of different approaches such as brachytherapy, cutting balloons, stents and stent grafts, drug-eluting stents, and drug-coated balloons.
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Affiliation(s)
- Gunnar Tepe
- Department of Diagnostic Radiology, University of Tuebingen, Hoppe-Seyler Strasse 3, 72076 Tuebingen, Germany.
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43
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Menard MT, Belkin M. Reconstructive Surgery. Vasc Med 2006. [DOI: 10.1016/b978-0-7216-0284-4.50026-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Tepe G, Muschick P, Laule M, Reddig F, Claussen CD, Dinkelborg LM, Tielemans H, Wehrmann M, Duda SH. Prevention of carotid artery restenosis after sirolimus-coated stent implantation in pigs. Stroke 2005; 37:492-4. [PMID: 16385094 DOI: 10.1161/01.str.0000199080.94177.ba] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND PURPOSE To test the feasibility of self-expanding drug-coated nitinol stents for prevention of restenosis in an animal model. Stent implantation in the carotid artery (CA) has been shown to be feasible for treatment of CA stenosis. Even though the restenosis rate in CA is reported to be lower than in the coronary and peripheral arteries, problems may arise with increasing numbers of treated patients and lengthier follow-up. METHODS After predilatation with 8-mm balloons, 8 Goettinger minipigs were randomly selected to receive a sirolimus-eluting self-expanding nitinol stent (7 mm/80 mm) as well as the same stent without sirolimus/polymer coating in the right or left CA. Aspirin was given starting 3 days before the intervention and administered for an additional 4 weeks. Clopidogrel was administered for 10 days. RESULTS After 6 weeks, 2 subacute occlusions were observed in both groups. In the remaining vessels, the neointima was significantly reduced by sirolimus/polymer-coated stents (5.9+/-2.5 versus 0.7+/-1.0 mm2). CONCLUSIONS Sirolimus self-expanding nitinol stents may be an effective tool in reducing neointimal formation in CA.
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Affiliation(s)
- Gunnar Tepe
- Department of Diagnostic Radiology, University of Tuebingen, Germany.
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45
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Abstract
The interventional radiologist plays an important role in the detection and prevention of infrainguinal bypass failure. Early detection and evaluation of flow-limiting lesions effectively preserve graft (venous bypass and polyester or expanded polytetrafluoroethylene bypass) patency by identifying stenoses before occlusion occurs. Delay in treatment of the at-risk graft may result in graft failure and a reduced chance of successful revascularization. For this reason, surveillance protocols form an important part of follow-up after infrainguinal bypass surgery. As well as having an understanding of the application of imaging techniques including ultrasound, MR angiography, CT angiography and digital subtraction angiography, the interventional radiologist should have detailed knowledge of the minimally invasive therapeutic options. Percutaneous transluminal angioplasty (PTA), or alternatively cutting balloon angioplasty, is the interventional treatment of choice in prevention of graft failure and occlusion. Further alternatives include metallic stent placement, fibrinolysis, and mechanical thrombectomy. Primary assisted patency rates following PTA can be up to 65% at 5 years. When the endovascular approach is unsuccessful, these therapeutic options are complemented by surgical procedures including vein patch revision, jump grafting, or placement of a new graft.
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Affiliation(s)
- S Müller-Hülsbeck
- Department of Radiology, University Hospital Schleswig-Holstein, Campus Kiel, Arnold-Heller-Strasse 9, 24105 Kiel, Germany.
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Wiesinger B, Beregi JP, Oliva VL, Dietrich T, Tepe G, Bosiers M, Hüttl K, Müller-Hülsbeck S, Bray A, Tielemans H, Duda SH. PTFE-covered self-expanding nitinol stents for the treatment of severe iliac and femoral artery stenoses and occlusions: final results from a prospective study. J Endovasc Ther 2005; 12:240-6. [PMID: 15823072 DOI: 10.1583/04-1327mr.1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE To evaluate the technical performance, safety, and 1-year clinical efficacy of polytetrafluoroethylene (PTFE)-covered nitinol stents in the treatment of atherosclerotic iliac and superficial femoral artery (SFA) disease. METHODS The multicenter, prospective, nonrandomized COVENT study involved 98 patients (70 men; mean age 64+/-10 years) who received PTFE-covered nitinol stents in 107 arteries (60 iliac and 47 SFAs) after predilation. The average lesion length was 50 mm in the SFA and 45 mm in the iliac arteries. Postdilation was performed when necessary. Duplex ultrasound and ankle-brachial index (ABI) were performed at discharge and at 1, 6, and 12 months in follow-up. RESULTS In total, 130 stents were placed successfully in 97 (99%) of 98 patients. One stent was misplaced during deployment and required subsequent surgical removal. The average stenosis grade was reduced from 98% to 6% in the SFAs and from 96% to 4% in the iliac arteries after covered stent placement. There was a significant rise of the mean ABI from 0.64 at baseline to 0.97 and 0.95 at 1 and 12 months, respectively (p<0.001). There were 7 primary covered stent occlusions (6.5% of 107 stented lesions: 3 not treated, 2 bypassed, 2 dilated or stented) and 5 (4.7%) recurrent in-stent occlusions (1 bypassed, 2 dilated, 2 untreated) during the 1-year follow-up. Primary patency rates were 92% at 6 months and 89.8% at 12 months for the entire cohort. Secondary patency rates were 98% and 95.6%, respectively. No statistically significant differences were observed in the primary patency rates for the SFAs (89.3% at both 6 and 12 months) versus the iliac arteries (94.3% at 6 months and 90.7% at 12 months). CONCLUSIONS Primary implantation of PTFE-covered nitinol stents in the iliac and superficial femoral arteries is technically feasible, safe, and effective, with excellent 1-year patency.
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Affiliation(s)
- Benjamin Wiesinger
- Division of Diagnostic Radiology, Department of Radiology, University of Tübingen, Germany.
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Davies MG, Waldman DL, Pearson TA. Comprehensive Endovascular Therapy for Femoropopliteal Arterial Atherosclerotic Occlusive Disease. J Am Coll Surg 2005; 201:275-96. [PMID: 16038827 DOI: 10.1016/j.jamcollsurg.2005.03.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2005] [Revised: 03/07/2005] [Accepted: 03/07/2005] [Indexed: 11/22/2022]
Affiliation(s)
- Mark G Davies
- Center for Vascular Disease, Division of Vascular Surgery, Department of Surgery, University of Rochester Medical Center, Rochester, NY 14642, USA.
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Tepe G, Dietrich T, Grafen F, Brehme U, Muschick P, Dinkelborg LM, Greschniok A, Claussen CD, Duda SH. Reduction of Intimal Hyperplasia withRe-188-labeled Stents in a Rabbit Model at 7and 26 Weeks: An Experimental Study. Cardiovasc Intervent Radiol 2005; 28:632-7. [PMID: 16059762 DOI: 10.1007/s00270-004-0308-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The aim of this study was to analyze the feasibility of (188)Re-labeled stents to reduce neointimal formation in a rabbit atherosclerosis model and to test the long-term effects at 7 and 26 weeks. Fifty-nine male New Zealand White rabbits were fed a 0.5% cholesterol diet for 4 weeks before balloon angioplasty and insertion of Palmaz stents in the infrarenal aorta. The animals were sacrificed 7 and 26 weeks after stent implantation. Control stents were compared with (188)Re stents: (dose 1) 11.3 +/- 1.8 MBq; (dose 2) 37.3 +/- 4.2 MBq, and (dose 3) 80.1 +/- 7.8 MBq. Each activity group consisted of a short-term (7 weeks) and a long-term group (26 weeks), resulting in a total of eight study groups. No thrombotic occlusion was observed. The neointimal formation in the control group was 2.11 [95% confidence interval (CI): 0.68--6.52] mm(2) at 7 weeks and 2.10 (0.62--7.11) at 26 weeks. In the treatment groups, neointima reduction was detectable at 7 weeks [dose 1: 0.33 (0.09--1.22) mm(2); dose 2: 0.17 (0.05--0.57) mm(2); dose 3: 0.03 (0.01--0.13) mm(2)]. After 26 weeks, a catch-up of neointimal formation in the radioactive groups was most obvious in the low-dose group [dose 1: 0.80 (0.28--2.29) mm(2); dose 2: 0.18([0.06--0.52) mm(2); dose 3: 0.50 (0.17--1.42) mm(2)]. Compared to the long-term control group, neointimal reduction was still >60%. No induction of neointimal formation was observed at the edges of the stents. Radiation resulted in delayed re-endothelialization. (188)Re stents were capable to reduce intimal hyperplasia and did not cause thrombosis. The edge effect, which was the major limitation of (32)P stents, was not observed in (188)Re stents.
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Affiliation(s)
- Gunnar Tepe
- Department of Diagnostic Radiology, University of Tübingen, Tübingen, Germany.
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Uurto I, Mikkonen J, Parkkinen J, Keski-Nisula L, Nevalainen T, Kellomäki M, Törmälä P, Salenius JP. Drug-Eluting Biodegradable Poly-D/L-Lactic Acid Vascular Stents:An Experimental Pilot Study. J Endovasc Ther 2005; 12:371-9. [PMID: 15943514 DOI: 10.1583/05-1525.1] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE To evaluate in vivo a new drug-eluting biodegradable vascular stent with respect to biocompatibility, neointimal hyperplasia formation, and reliability. METHODS Self-expanding biodegradable poly-96L/4D-lactic acid (PLA) stents with 2 drugs (PLA + dexamethasone [DEX] and PLA + simvastatin [SIM]) and 2 different coatings (PLA + P(D,L)LA and PLA + polycaprolactone [PCL]) were compared with a self-expanding stainless steel Wallstent. The stents were implanted in both common iliac arteries of 8 pigs. Prior to sacrifice at 1 month, angiography was performed to determine patency. Specimens were harvested for quantitative histomorphometry; vascular injury and inflammation scores were assigned to the stented iliac segments. RESULTS All stented arteries were angiographically patent. The mean luminal diameter (3.05 mm) and area (30.36 mm2) of DEX-eluting PLA stents were decreased compared to other stents (PLA + P(D,L)LA: 3.66 mm and 43.92 mm2; PLA + SIM: 4.21 mm and 56.48 mm2; PLA + PCL: 4.19 mm and 54.64 mm2; Wallstent: 5.01 mm and 81.19 mm2). Wallstents and DEX-eluting PLA stents induced minimal intimal hyperplasia: PLA + DEX: 0.16 mm, PLA + P(D,L)LA: 0.35 mm, PLA + SIM: 0.33 mm, PLA + PCL: 0.29 mm, and Wallstent: 0.18 mm. The vascular injury scores demonstrated only mild vascular trauma for all stents. Only mild to moderate inflammatory reaction was noted around stent struts with a vascular inflammation score. CONCLUSIONS Biodegradable polymer stents appear to be biocompatible and reliable, causing minimal neointimal hyperplasia. Furthermore, the new biodegradable poly-D/L-lactic acid stent can be used as a local drug delivery vehicle. The DEX-eluting PLA stent reduces neointimal hyperplasia. The findings show a need for further investigation to prove the efficacy and safety of this new biodegradable drug-eluting stent.
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Affiliation(s)
- Ilkka Uurto
- Department of Surgery, Satakunta Central Hospital, Pori, Finland.
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50
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Speck U, Scheller B, Abramjuk C, Bernhardt U. Drug delivery by angiographic contrast media: inhibition of restenosis. Acad Radiol 2005; 12 Suppl 1:S14-7. [PMID: 16106539 DOI: 10.1016/j.acra.2005.02.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Ulrich Speck
- Dept. of Radiology, Charité University Hospital, Berlin, Germany
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