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Stachon T, Omar Ali M, Latta L, Huessein GH, Mohamed TA, Soliman W, Seitz B, Szentmáry N. Effect of Thyroxine on Transforming Growth Factor β1, Collagen I, and V Expression in Keratoconus Corneal Fibroblasts and Keratocytes, in Vitro. Curr Eye Res 2021; 47:206-213. [PMID: 34407700 DOI: 10.1080/02713683.2021.1967403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Keratoconus (KC) is a corneal disorder, associated with oxidative stress, hypoxia and as several times discussed, potentially with thyroid gland dysfunction. We aimed to investigate the effect of thyroxine on transforming growth factor β1 (TGF-β1), collagen I and V (Col I and V) expression in human corneal fibroblasts (HCFs) and human keratocytes of KC corneas, in vitro. METHODS Primary human KC-keratocytes and normal keratocytes were isolated and cultured as corneal fibroblasts or keratocytes. The effect of 0.1 µg/ml and 1.0 µg/ml thyroxine on TGF-β1, Col I and Col V expression was investigated by qPCR, Western blot, and ELISA. Proliferation assay was performed using BrdU ELISA to observe the 24h effect of 1.0 µg/ml thyroxine on keratocytes, in vitro. RESULTS TGFB1 mRNA expression of normal keratocytes increased following 1.0 µg/ml thyroxine stimulation for 24 h (p = .036), without changes in protein expression. Col I protein expression of KC-HCFs increased following 1.0 µg/ml thyroxine stimulation for 24 h (p = .0003). Proliferation of normal and KC keratocytes increased following a 7-day growth period and 24 hours thyroxine administration (p = .018; p = .024). CONCLUSIONS Thyroxine may affect the Col I protein expression in KC-HCFs, but not in KC keratocytes, in vitro. Thyroxine administration has no effect on TGF-β1, collagen I and V expression of keratoconus keratocytes. Therefore, an increased thyroxine concentration alone seems not to be causally related to the development of keratoconus.
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Affiliation(s)
- Tanja Stachon
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany
| | - Marwa Omar Ali
- Department of Ophthalmology, Saarland University Medical Center, Homburg/Saar, Germany
| | - Lorenz Latta
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany
| | | | - Tarek A Mohamed
- Department of Ophthalmology, Assiut University, Assiut, Egypt
| | - Wael Soliman
- Department of Ophthalmology, Assiut University, Assiut, Egypt
| | - Berthold Seitz
- Department of Ophthalmology, Saarland University Medical Center, Homburg/Saar, Germany
| | - Nóra Szentmáry
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany.,Department of Ophthalmology, Semmelweis University, Budapest, Hungary
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Wang D, Rabhi N, Yet SF, Farmer SR, Layne MD. Aortic carboxypeptidase-like protein regulates vascular adventitial progenitor and fibroblast differentiation through myocardin related transcription factor A. Sci Rep 2021; 11:3948. [PMID: 33597582 PMCID: PMC7889889 DOI: 10.1038/s41598-021-82941-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 01/25/2021] [Indexed: 02/06/2023] Open
Abstract
The vascular adventitia contains numerous cell types including fibroblasts, adipocytes, inflammatory cells, and progenitors embedded within a complex extracellular matrix (ECM) network. In response to vascular injury, adventitial progenitors and fibroblasts become activated and exhibit increased proliferative capacity and differentiate into contractile cells that remodel the ECM. These processes can lead to vascular fibrosis and disease progression. Our previous work established that the ECM protein aortic carboxypeptidase-like protein (ACLP) promotes fibrotic remodeling in the lung and is activated by vascular injury. It is currently unknown what controls vascular adventitial cell differentiation and if ACLP has a role in this process. Using purified mouse aortic adventitia Sca1+ progenitors, ACLP repressed stem cell markers (CD34, KLF4) and upregulated smooth muscle actin (SMA) and collagen I expression. ACLP enhanced myocardin-related transcription factor A (MRTFA) activity in adventitial cells by promoting MRTFA nuclear translocation. Sca1 cells from MRTFA-null mice exhibited reduced SMA and collagen expression induced by ACLP, indicating Sca1 cell differentiation is regulated in part by the ACLP-MRTFA axis. We determined that ACLP induced vessel contraction and increased adventitial collagen in an explant model. Collectively these studies identified ACLP as a mediator of adventitial cellular differentiation, which may result in pathological vessel remodeling.
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Affiliation(s)
- Dahai Wang
- Department of Biochemistry, Boston University School of Medicine, 72 E. Concord St, Boston, MA, 02118, USA.,Department of Hematology, Boston Children's Hospital, Boston, MA, USA
| | - Nabil Rabhi
- Department of Biochemistry, Boston University School of Medicine, 72 E. Concord St, Boston, MA, 02118, USA
| | - Shaw-Fang Yet
- Institute of Cellular and System Medicine, National Health Research Institutes, Zhunan, 35053, Taiwan
| | - Stephen R Farmer
- Department of Biochemistry, Boston University School of Medicine, 72 E. Concord St, Boston, MA, 02118, USA
| | - Matthew D Layne
- Department of Biochemistry, Boston University School of Medicine, 72 E. Concord St, Boston, MA, 02118, USA.
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Ang HY, Xiong GM, Chaw SY, Phua JL, Ng JCK, Wong PEH, Venkatraman S, Chong TT, Huang Y. Adventitial injection delivery of nano-encapsulated sirolimus (Nanolimus) to injury-induced porcine femoral vessels to reduce luminal restenosis. J Control Release 2019; 319:15-24. [PMID: 31863795 DOI: 10.1016/j.jconrel.2019.12.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/09/2019] [Accepted: 12/17/2019] [Indexed: 02/07/2023]
Abstract
Endovascular therapy in peripheral intervention has grown exponentially in the past decade, but the issue of high restenosis rates in lower extremity arteries still persist. While drug-coated balloons (DCB) have been the device of choice, recent controversary regarding the long-term safety of paclitaxel have raised concern over current DCBs. In our study, we proposed that the direct injection of a sirolimus nanoliposomal formulation (Nanolimus) using a infusion catheter can attenuate inflammation response in injured vessels. In vitro characterization showed retention of the nanoliposomes size and detectable drug amount up to 336 days in storage. For in vivo study, four female, mixed breed swines were subjected to balloon injury of the femoral arteries before treatment with either injection of saline (n = 4) or Nanolimus (n = 12) using the Bullfrog catheter. Pharmacokinetic analysis demonstrated sustained sirolimus release in the arteries and undetectable systemic drug level at 28 days. Arteries treated with Nanolimus showed significant reduction in neointima area (0.2 ± 0.3 mm2 vs 2.0 ± 1.2 mm2, p < 0.01) and luminal stenosis (14.2 ± 7.2% vs. 67.7 ± 24.8%, p < 0.01) compared to controls. In summary, adventitial delivery of sirolimus using an infusion catheter is a feasible and safe method to reduce vascular restenosis.
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Affiliation(s)
- Hui Ying Ang
- National Heart Centre Singapore, 5 Hospital Drive, 169609, Singapore; Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
| | - Gordon Minru Xiong
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - Su Yin Chaw
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - Jie Liang Phua
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - Jaryl Chen Koon Ng
- National Heart Centre Singapore, 5 Hospital Drive, 169609, Singapore; Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore
| | - Philip En Hou Wong
- National Heart Centre Singapore, 5 Hospital Drive, 169609, Singapore; Duke-NUS Medical School, 8 College Road, 169857, Singapore
| | - Subbu Venkatraman
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - Tze Tec Chong
- Duke-NUS Medical School, 8 College Road, 169857, Singapore; Department of Vascular Surgery, Singapore General Hospital, Singapore
| | - Yingying Huang
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore.
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Krishnan P, Purushothaman KR, Purushothaman M, Turnbull IC, Tarricone A, Vasquez M, Jain S, Baber U, Lascano RA, Kini AS, Sharma SK, Moreno PR. Enhanced neointimal fibroblast, myofibroblast content and altered extracellular matrix composition: Implications in the progression of human peripheral artery restenosis. Atherosclerosis 2016; 251:226-233. [PMID: 27399649 DOI: 10.1016/j.atherosclerosis.2016.06.046] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 06/02/2016] [Accepted: 06/29/2016] [Indexed: 01/13/2023]
Abstract
BACKGROUND AND AIMS Neointimal cellular proliferation of fibroblasts and myofibroblasts is documented in coronary artery restenosis, however, their role in peripheral arterial disease (PAD) restenosis remains unclear. Our aim was to investigate the role of fibroblasts, myofibroblasts, and collagens in restenotic PAD. METHODS Nineteen PAD restenotic plaques were compared with 13 de novo plaques. Stellate cells (H&E), fibroblasts (FSP-1), myofibroblasts (α-actin/vimentin/FSP-1), cellular proliferation (Ki-67), and apoptosis (caspase-3 with poly ADP-ribose polymerase) were evaluated by immunofluorescence. Collagens were evaluated by picro-sirius red stain with polarization microscopy. Smooth muscle myosin heavy chain (SMMHC), IL-6 and TGF-β cytokines were analyzed by immunohistochemistry. RESULTS Restenotic plaques demonstrated increased stellate cells (2.7 ± 0.15 vs.1.3 ± 0.15) fibroblasts (2282.2 ± 85.9 vs. 906.4 ± 134.5) and myofibroblasts (18.5 ± 1.2 vs.10.6 ± 1.0) p = 0.0001 for all comparisons. In addition, fibroblast proliferation (18.4% ± 1.2 vs.10.4% ± 1.1; p = 0.04) and apoptosis (14.6% ± 1.3 vs.11.2% ± 0.6; p = 0.03) were increased in restenotic plaques. Finally, SMMHC (2.6 ± 0.12 vs.1.4 ± 0.15; p = 0.0001), type III collagen density (0.33 ± 0.06 vs. 0.17 ± 0.07; p = 0.0001), IL-6 (2.08 ± 1.7 vs.1.03 ± 2.0; p = 0.01), and TGF-β (1.80 ± 0.27 vs. 1.11 ± 0.18; p = 0.05) were increased in restenotic plaques. CONCLUSIONS Our study suggests proliferation and apoptosis of fibroblast and myofibroblast with associated increase in type III collagen may play a role in restenotic plaque progression. Understanding pathways involved in proliferation and apoptosis in neointimal cells, may contribute to future therapeutic interventions for the prevention of restenosis in PAD.
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Affiliation(s)
- Prakash Krishnan
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - K-Raman Purushothaman
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Meerarani Purushothaman
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Irene C Turnbull
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Arthur Tarricone
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Miguel Vasquez
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sachin Jain
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Usman Baber
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Rheoneil A Lascano
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Annapoorna S Kini
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Samin K Sharma
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Pedro R Moreno
- The Zena and Michael A. Weiner Cardiovascular Institute, The Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine/Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Relation of Internal Elastic Lamellar Layer Disruption to Neointimal Cellular Proliferation and Type III Collagen Deposition in Human Peripheral Artery Restenosis. Am J Cardiol 2016; 117:1173-9. [PMID: 26857165 DOI: 10.1016/j.amjcard.2016.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Revised: 01/07/2016] [Accepted: 01/07/2016] [Indexed: 11/21/2022]
Abstract
Smooth muscle cell proliferation and extracellular matrix formation are responsible for disease progression in de novo and restenotic atherosclerosis. Internal elastic lamella (IEL) layer maintains the structural integrity of intima, and disruption of IEL may be associated with alterations in neointima, type III collagen deposition, and lesion progression in restenosis. Nineteen restenotic plaques (12 patients) procured during peripheral interventions were compared with 13 control plaques (12 patients) without restenosis. Hematoxylin & Eosin and elastic trichrome stains were used to measure length and percentage of IEL disruption, cellularity, and inflammation score. Type I and III collagens, smooth muscle cell (smc), fibroblast density, and nuclear proliferation (Ki67) percentage were evaluated by immunohistochemistry. IEL disruption percentage (28 ± 3.6 vs 6.1 ± 2.4; p = 0.0006), type III collagen content (0.33 ± 0.06 vs 0.17 ± 0.07; p = 0.0001), smc density (2014 ± 120 vs 923 ± 150; p = 0.0001), fibroblast density (2,282 ± 297 vs 906 ± 138; p = 0.0001), and Ki67 percentage (21.6 ± 2 vs 8.2 ± 0.65; p = 0.0001) were significantly increased in restenotic plaques compared to de novo plaques. Logistic regression analysis identified significant correlation between IEL disruption and neointimal smc density (r = 0.45; p = 0.01) and with type III collagen deposition (r = 0.61; p = 0.02) in restenosis. Increased IEL disruption may trigger cellular proliferation, altering collagen production, and enhancing restenotic neointima. In conclusion, understanding the pathologic and molecular basis of restenosis and meticulous-guided interventions oriented to minimize IEL damage may aid to reduce neointimal proliferation and the occurrence of restenosis.
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6
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Heidari M, Mandato CA, Lehoux S. Vascular smooth muscle cell phenotypic modulation and the extracellular matrix. Artery Res 2015. [DOI: 10.1016/j.artres.2014.12.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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7
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Gasper WJ, Jimenez CA, Walker J, Conte MS, Seward K, Owens CD. Adventitial nab-rapamycin injection reduces porcine femoral artery luminal stenosis induced by balloon angioplasty via inhibition of medial proliferation and adventitial inflammation. Circ Cardiovasc Interv 2013; 6:701-9. [PMID: 24221390 DOI: 10.1161/circinterventions.113.000195] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Endovascular interventions on peripheral arteries are limited by high rates of restenosis. Our hypothesis was that adventitial injection of rapamycin nanoparticles would be safe and reduce luminal stenosis in a porcine femoral artery balloon angioplasty model. METHODS AND RESULTS Eighteen juvenile male crossbred swine were included. Single-injury (40%-60% femoral artery balloon overstretch injury; n=2) and double-injury models (endothelial denudation injury 2 weeks before a 20%-30% overstretch injury; n=2) were compared. The double-injury model produced significantly more luminal stenosis at 28 days, P=0.002, and no difference in medial fibrosis or inflammation. Four pigs were randomized to the double-injury model and adventitial injection of saline (n=2) or 500 μg of nanoparticle albumin-bound rapamycin (nab-rapamycin; n=2) with an endovascular microinfusion catheter. There was 100% procedural success and no difference in endothelial regeneration. At 28 days, nab-rapamycin led to significant reductions in luminal stenosis, 17% (interquartile range, 12%-35%) versus 10% (interquartile range, 8.3%-14%), P=0.001, medial cell proliferation, P<0.001, and fibrosis, P<0.001. There were significantly fewer adventitial leukocytes at 3 days, P<0.001, but no difference at 28 days. Pharmacokinetic analysis (single-injury model) found rapamycin concentrations 1500× higher in perivascular tissues than in blood at 1 hour. Perivascular rapamycin persisted ≥8 days and was not detectable at 28 days. CONCLUSIONS Adventitial nab-rapamycin injection was safe and significantly reduced luminal stenosis in a porcine femoral artery balloon angioplasty model. Observed reductions in early adventitial leukocyte infiltration and late medial cell proliferation and fibrosis suggest an immunosuppressive and antiproliferative mechanism. An intraluminal microinfusion catheter for adventitial injection represents an alternative to stent- or balloon-based local drug delivery.
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Affiliation(s)
- Warren J Gasper
- From the Departments of Vascular Surgery (W.J.G., J.W., M.S.C., C.D.O.) and Pathology (C.A.J.), University of California, San Francisco; and Mercator MedSystems, Inc, San Leandro, California (K.S.)
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Pettersen RJ, Salem M, Rotevatn S, Kuiper KK, Larsen TH, Bohov P, Berge RK, Nordrehaug JE. Effects of local delivery of Tetradecylthioacetic acid within the injured coronary vessel wall. SCAND CARDIOVASC J 2012; 46:366-73. [DOI: 10.3109/14017431.2012.725477] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Gerloff J, Korshunov VA. Immune modulation of vascular resident cells by Axl orchestrates carotid intima-media thickening. THE AMERICAN JOURNAL OF PATHOLOGY 2012; 180:2134-43. [PMID: 22538191 DOI: 10.1016/j.ajpath.2012.01.036] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 12/20/2011] [Accepted: 01/05/2012] [Indexed: 12/26/2022]
Abstract
Cellular mechanisms of carotid intima-media thickening (IMT) are largely unknown. The receptor tyrosine kinase Axl is essential for function of both bone marrow (BM) and non-BM cells. We studied the mechanisms by which Axl expression in BM-derived cells (compared with non-BM-derived cells) mediates carotid IMT. Partial ligation of the left carotid artery resulted in a similar carotid blood flow reduction in Axl chimeras. Neither irradiation nor bone marrow transplantation had any effect on the 40% difference in carotid IMT between Axl genotypes. Axl-dependent survival is very important for intimal leukocytes; however, Axl expression in BM cells contributes to <30% of carotid IMT. Axl in non-BM cells has a greater effect on carotid remodeling. Expression of Axl in non-BM cells is crucial for the up-regulation of several key proinflammatory signals (eg, IL-1) in the carotid. We found that Axl is involved in immune activation of cultured smooth muscle cells and in immune heterogeneity of medial cells (measured by major histocompatibility complex class II) after carotid injury. Finally, a lack of Axl in non-BM cells increased collagen Iα expression, which may play a critical role in carotid remodeling. Our data suggest that Axl contributes to carotid remodeling not only by inhibition of apoptosis but also via regulation of immune heterogeneity of vascular cells, cytokine/chemokine expression, and extracellular matrix remodeling.
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Affiliation(s)
- Janice Gerloff
- Department of Medicine, Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, New York 14642, USA
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Osherov AB, Gotha L, Cheema AN, Qiang B, Strauss BH. Proteins mediating collagen biosynthesis and accumulation in arterial repair: novel targets for anti-restenosis therapy. Cardiovasc Res 2011; 91:16-26. [PMID: 21245059 DOI: 10.1093/cvr/cvr012] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Events contributing to restenosis after coronary interventions include platelet aggregation, inflammatory cell infiltration, growth factor release, and accumulation of smooth muscle cells (SMCs) and extracellular matrix (ECM). The ECM is composed of various collagen subtypes and proteoglycans and over time constitutes the major component of the mature restenotic plaque. The pathophysiology of collagen accumulation in the ECM during arterial restenosis is reviewed. Factors regulating collagen synthesis and degradation, including various cytokines and growth factors involved in the process, may be targets for therapies aimed at prevention of in-stent restenosis.
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Affiliation(s)
- Azriel B Osherov
- Schulich Heart Program, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Room A-253, Toronto, Ontario, Canada M4N 3M5
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Fleenor BS, Bowles DK. Exercise training decreases the size and alters the composition of the neointima in a porcine model of percutaneous transluminal coronary angioplasty (PTCA). J Appl Physiol (1985) 2009; 107:937-45. [PMID: 19556453 DOI: 10.1152/japplphysiol.91444.2008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Exercise training (EX) following percutaneous transluminal coronary angiography (PTCA) reduces progression to restenosis and increases event-free survival rates. Our aim was to determine whether EX inhibits lesion development and/or alters the extracellular matrix (ECM) composition of the neointima (NI) in a porcine PTCA model. Miniature Yucatan swine were assigned to cage confinement (SED) or EX for 20 wk. After 16 wk, all animals underwent a PTCA procedure of the left anterior descending artery (LAD) and left circumflex artery (LCX), with subsequent placement of an externalized jugular catheter. Animals recovered for 2 days and then resumed the previous protocol of SED or EX. Twelve days following PTCA, all animals received an intravenous bromodeoxyuridine (BrdU) injection to label proliferating cells. At 28 days following PTCA, the animals were euthanized, the LAD and LCX excised, and underwent standard histological processing for total collagen, type I collagen, fibronectin, BrdU, and Verhoeff-van Gieson stain. Our results demonstrate that EX significantly decreased lesion size and NI proliferation (-48%) in the LAD (P < 0.05) but not the LCX. Furthermore, EX attenuated type I collagen expression only in LAD, whereas total collagen was increased (5.9%) and fibronectin was decreased (-7.9%) in the NI of both vessels (P < 0.05). In conclusion, EX following PTCA may increase event-free survival rates following PTCA by decreasing lesion size and altering ECM composition.
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Affiliation(s)
- Bradley S Fleenor
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri 65211, USA
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Forte A, Finicelli M, De Luca P, Quarto C, Onorati F, Santè P, Renzulli A, Galderisi U, Berrino L, De Feo M, Rossi F, Cotrufo M, Cascino A, Cipollaro M. Expression profiles in surgically-induced carotid stenosis: a combined transcriptomic and proteomic investigation. J Cell Mol Med 2009; 12:1956-73. [PMID: 19012726 PMCID: PMC4506163 DOI: 10.1111/j.1582-4934.2008.00212.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Vascular injury aimed at stenosis removal induces local reactions often leading to restenosis. The aim of this study was a concerted transcriptomic-proteomics analysis of molecular variations in a model of rat carotid arteriotomy, to dissect the molecular pathways triggered by vascular surgical injury and to identify new potential anti-restenosis targets. RNA and proteins extracted from inbred Wistar Kyoro (WKY) rat carotids harvested 4 hrs, 48 hrs and 7 days after arteriotomy were analysed by Affymetrix rat microarrays and by bidimensional electrophoresis followed by liquid chromatography and tandem mass spectrometry, using as reference the RNA and the proteins extracted from uninjured rat carotids. Results were classified according to their biological function, and the most significant Kyoro Encyclopedia of Genes and Genomes (KEGG) pathways were identified. A total of 1163 mRNAs were differentially regulated in arteriotomy-injured carotids 4 hrs, 48 hrs and 7 days after injury (P < 0.0001, fold-change > or =2), while 48 spots exhibited significant changes after carotid arteriotomy (P < 0.05, fold-change > or =2). Among them, 16 spots were successfully identified and resulted to correspond to a set of 19 proteins. mRNAs were mainly involved in signal transduction, oxidative stress/inflammation and remodelling, including many new potential targets for limitation of surgically induced (re)stenosis (e.g. Arginase I, Kruppel like factors). Proteome analysis confirmed and extended the microrarray data, revealing time-dependent post-translational modifications of Hsp27, haptoglobin and contrapsin-like protease inhibitor 6, and the differential expression of proteins mainly involved in contractility. Transcriptomic and proteomic methods revealed functional categories with different preferences, related to the experimental sensitivity and to mechanisms of regulation. The comparative analysis revealed correlation between transcriptional and translational expression for 47% of identified proteins. Exceptions from this correlation confirm the complementarities of these approaches.
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Affiliation(s)
- A Forte
- Excellence Research Center for Cardiovascular Diseases, Department of Experimental Medicine, Second University of Naples, Italy.
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Schmidt M, Jaeggi E, Ryan G, Hyldebrandt J, Lilly J, Peirone A, Benson L, Chaturvedi RR. Percutaneous ultrasound-guided stenting of the atrial septum in fetal sheep. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2008; 32:923-928. [PMID: 18839405 DOI: 10.1002/uog.5405] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVES Hypoplastic left heart syndrome (HLHS) with a restricitive foramen ovale is associated with high mortality related to fetal left atrial hypertension. Fetal atrial balloon septoplasty has largely failed to achieve adequate decompression due to the small size of the holes produced. We attempted to produce larger atrial communications by stenting the atrial septum in fetal sheep using a minimally invasive technique. METHODS We used a percutaneous, ultrasound-guided transpulmonary or transhepatic approach to attempt deployment of coronary stents (2-5 mm in diameter and 13-23 mm in length) in the atrial septum primum of 10 normal fetal sheep. RESULTS Coronary stents were deployed in eight of the 10 fetal sheep (119-139 days' gestation). The transhepatic route was unsuccessful (n = 2). Transpulmonary implantation was only possible in prone fetuses, so three initially supine fetuses underwent external version. Small coronary stents (2.0-2.5 mm in diameter) were deployed rapidly without complication via an 18G needle (n = 4). Larger coronary stents (5 mm in diameter) were delivered through a 4F sheath, but a right pleural effusion occurred in three of the four cases, related to inferior vena cava injury by the balloon. One stent dislodged from a floppy septum. Another was partially occluded within a week by endocardial cells. CONCLUSIONS Percutaneous ultrasound-guided deployment of coronary stents into the septum primum is feasible without laparotomy or uterine exteriorization in fetal sheep. Partial luminal occlusion by rapid proliferation of endocardial cells is a concern.
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Affiliation(s)
- M Schmidt
- Department of Cardiovascular Surgery, Aarhus University Hospital, Aarhus, Denmark
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Effects of pentoxifylline on the vascular response to injury after angioplasty in rabbit iliac arteries. Basic Res Cardiol 2007; 103:257-64. [DOI: 10.1007/s00395-007-0694-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2007] [Accepted: 11/22/2007] [Indexed: 10/22/2022]
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