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Kuniakova M, Klein M, Galfiova P, Csobonyeiova M, Feitscherova C, Polak S, Novakova ZV, Topoliova K, Trebaticky B, Varga I, Danisovic L, Ziaran S. Decellularization of the human urethra for tissue engineering applications. Exp Biol Med (Maywood) 2023; 248:1034-1042. [PMID: 37073134 PMCID: PMC10581165 DOI: 10.1177/15353702231162092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 01/24/2023] [Indexed: 04/20/2023] Open
Abstract
Recently, several scaffolds have been introduced for urethral tissue engineering. However, acellular human urethral scaffold harvested from deceased donors may provide significant advantages compared to synthetic, composite, or other biological scaffolds. This study aims to develop the protocol for decellularization of the human urethra that preserves substantial extracellular matrix (ECM) components, which are essential for subsequent recellularization mimicking the natural environment of the native ECM. A total of 12 human urethras were harvested from deceased donors. An equal part of every harvested urethra was used as a control sample for analyses. The protocol design was based on the enzyme-detergent-enzyme method. Trypsin and Triton X-100 were used to remove cells, followed by DNase treatment to remove DNA residues. Subsequently, the specimens were continually rinsed in deionized water for seven days. The efficiency of decellularization was determined by histochemistry, immunohistochemical staining, scanning electron microscopy (SEM), and DNA quantification. Histological analysis confirmed cell removal and preservation of urethral structure after decellularization. The preservation of collagen IV and fibronectin was confirmed by histologic examination and immunohistochemical staining. SEM confirmed the maintenance of the ultrastructural architecture of ECM and fibers. DNA content in decellularized urethra was significantly lower compared to the native sample (P < 0.001), and so the criteria for decellularized tissue were met. Cytotoxicity analysis data showed that the matrix-conditioned medium did not contain soluble toxins and had no significant inhibitory effect on cell proliferation, providing evidence that the decellularized samples are not toxic. This study demonstrates the feasibility of the enzyme-detergent-enzyme-based decellularization protocol for removing cellular components and maintaining urethral ECM and its ultrastructure. Moreover, obtained results provide solid ground for recellularization and urethral tissue engineering, which will follow.
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Affiliation(s)
- Marcela Kuniakova
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University Bratislava 811 08, Slovakia
- National Institute of Rheumatic Diseases, Piestany 921 12, Slovakia
| | - Martin Klein
- National Institute of Rheumatic Diseases, Piestany 921 12, Slovakia
- Institute of Histology and Embryology, Faculty of Medicine, Comenius University Bratislava, Bratislava 811 08, Slovakia
| | - Paulina Galfiova
- Institute of Histology and Embryology, Faculty of Medicine, Comenius University Bratislava, Bratislava 811 08, Slovakia
| | - Maria Csobonyeiova
- National Institute of Rheumatic Diseases, Piestany 921 12, Slovakia
- Institute of Histology and Embryology, Faculty of Medicine, Comenius University Bratislava, Bratislava 811 08, Slovakia
| | - Claudia Feitscherova
- National Institute of Rheumatic Diseases, Piestany 921 12, Slovakia
- Institute of Histology and Embryology, Faculty of Medicine, Comenius University Bratislava, Bratislava 811 08, Slovakia
| | - Stefan Polak
- Institute of Histology and Embryology, Faculty of Medicine, Comenius University Bratislava, Bratislava 811 08, Slovakia
| | - Zuzana Varchulova Novakova
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University Bratislava 811 08, Slovakia
- National Institute of Rheumatic Diseases, Piestany 921 12, Slovakia
| | - Katarina Topoliova
- Department of Urology, Faculty of Medicine, Comenius University Bratislava, Bratislava 833 05, Slovakia
| | - Branislav Trebaticky
- National Institute of Rheumatic Diseases, Piestany 921 12, Slovakia
- Department of Urology, Faculty of Medicine, Comenius University Bratislava, Bratislava 833 05, Slovakia
| | - Ivan Varga
- National Institute of Rheumatic Diseases, Piestany 921 12, Slovakia
- Institute of Histology and Embryology, Faculty of Medicine, Comenius University Bratislava, Bratislava 811 08, Slovakia
| | - Lubos Danisovic
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University Bratislava 811 08, Slovakia
- National Institute of Rheumatic Diseases, Piestany 921 12, Slovakia
| | - Stanislav Ziaran
- National Institute of Rheumatic Diseases, Piestany 921 12, Slovakia
- Department of Urology, Faculty of Medicine, Comenius University Bratislava, Bratislava 833 05, Slovakia
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S S, Dahal S, Bastola S, Dayal S, Yau J, Ramamurthi A. Stem Cell Based Approaches to Modulate the Matrix Milieu in Vascular Disorders. Front Cardiovasc Med 2022; 9:879977. [PMID: 35783852 PMCID: PMC9242410 DOI: 10.3389/fcvm.2022.879977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 05/20/2022] [Indexed: 12/12/2022] Open
Abstract
The extracellular matrix (ECM) represents a complex and dynamic framework for cells, characterized by tissue-specific biophysical, mechanical, and biochemical properties. ECM components in vascular tissues provide structural support to vascular cells and modulate their function through interaction with specific cell-surface receptors. ECM–cell interactions, together with neurotransmitters, cytokines, hormones and mechanical forces imposed by blood flow, modulate the structural organization of the vascular wall. Changes in the ECM microenvironment, as in post-injury degradation or remodeling, lead to both altered tissue function and exacerbation of vascular pathologies. Regeneration and repair of the ECM are thus critical toward reinstating vascular homeostasis. The self-renewal and transdifferentiating potential of stem cells (SCs) into other cell lineages represents a potentially useful approach in regenerative medicine, and SC-based approaches hold great promise in the development of novel therapeutics toward ECM repair. Certain adult SCs, including mesenchymal stem cells (MSCs), possess a broader plasticity and differentiation potential, and thus represent a viable option for SC-based therapeutics. However, there are significant challenges to SC therapies including, but not limited to cell processing and scaleup, quality control, phenotypic integrity in a disease milieu in vivo, and inefficient delivery to the site of tissue injury. SC-derived or -inspired strategies as a putative surrogate for conventional cell therapy are thus gaining momentum. In this article, we review current knowledge on the patho-mechanistic roles of ECM components in common vascular disorders and the prospects of developing adult SC based/inspired therapies to modulate the vascular tissue environment and reinstate vessel homeostasis in these disorders.
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Song N, Zhang X, Si Y, Yu J, Ding B. Superelastic, Breathable, and High-Barrier Nanofibrous Membranes with Biomimetic ECM Structure for Toxic Chemical Protection. ACS APPLIED MATERIALS & INTERFACES 2022; 14:8499-8507. [PMID: 35129346 DOI: 10.1021/acsami.2c00064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
As the last line of protection for humans, chemical protective suits provided safe and effective protection where chemical warfare agents (CWAs) or chemical reagents leaked; however, the existing chemical protective clothing had poor wearing pressure comfort due to the limitation of inherent materials. Herein, we reported a scalable strategy to fabricate chemical protective fabric (CPF) with a biomimetic extracellular matrix (ECM) barrier layer composed of an elastic fiber framework based on the cross-linked nanofiber membrane and the styrene-butadiene-styrene block copolymer (SBS)/acticarbon matrix. The construction of the reliable and strategical biomimetic ECM structure succeeded in fulfilling hazardous chemical barrier properties, recoverable deformation, and thermal comfort improvement. The resulting CPF exhibited waterproofness with exceeding 200 kPa hydrostatic pressure and exceptional WVT of 550.96 g m-2 d-1, rapid elastic recovery from a strain of 80%, high-cycle fatigue resistance, superior barrier performance against toxic chemicals, and keeping CEES resistance after 100 tensile loading cycles. The successful preparation of the fascinating biomimetic nanofibrous membrane may provide a particular research foundation for developing chemical protective clothing in the future.
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Affiliation(s)
- Nankai Song
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China
| | - Xuan Zhang
- College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Yang Si
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China
- College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China
| | - Jianyong Yu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China
| | - Bin Ding
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China
- College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China
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Dai M, Belaïdi JP, Fleury G, Garanger E, Rielland M, Schultze X, Lecommandoux S. Elastin-like Polypeptide-Based Bioink: A Promising Alternative for 3D Bioprinting. Biomacromolecules 2021; 22:4956-4966. [PMID: 34751573 DOI: 10.1021/acs.biomac.1c00861] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Three-dimensional (3D) bioprinting offers a great alternative to traditional techniques in tissue reconstruction, based on seeding cells manually into a scaffold, to better reproduce organs' complexity. When a suitable bioink is engineered with appropriate physicochemical properties, such a process can advantageously provide a spatial control of the patterning that improves tissue reconstruction. The design of an adequate bioink must fulfill a long list of criteria including biocompatibility, printability, and stability. In this context, we have developed a bioink containing a precisely controlled recombinant biopolymer, namely, elastin-like polypeptide (ELP). This material was further chemoselectively modified with cross-linkable moieties to provide a 3D network through photopolymerization. ELP chains were additionally either functionalized with a peptide sequence Gly-Arg-Gly-Asp-Ser (GRGDS) or combined with collagen I to enable cell adhesion. Our ELP-based bioinks were found to be printable, while providing excellent mechanical properties such as stiffness and elasticity in their cross-linked form. Besides, they were demonstrated to be biocompatible, showing viability and adhesion of dermal normal human fibroblasts (NHF). Expressions of specific extracellular matrix (ECM) protein markers as pro-collagen I, elastin, fibrillin, and fibronectin were revealed within the 3D network containing cells after only 18 days of culture, showing the great potential of ELP-based bioinks for tissue engineering.
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Affiliation(s)
- Michèle Dai
- L'Oréal Recherche Avancée, 1 avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France.,Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, F-33600 Pessac, France
| | - Jean-Philippe Belaïdi
- L'Oréal Recherche Avancée, 1 avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France
| | - Guillaume Fleury
- Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, F-33600 Pessac, France
| | - Elisabeth Garanger
- Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, F-33600 Pessac, France
| | - Maïté Rielland
- L'Oréal Recherche Avancée, 1 avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France
| | - Xavier Schultze
- L'Oréal Recherche Avancée, 1 avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France
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Sajeesh S, Broekelman T, Mecham RP, Ramamurthi A. Stem cell derived extracellular vesicles for vascular elastic matrix regenerative repair. Acta Biomater 2020; 113:267-278. [PMID: 32645438 PMCID: PMC10755342 DOI: 10.1016/j.actbio.2020.07.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 06/12/2020] [Accepted: 07/01/2020] [Indexed: 01/12/2023]
Abstract
Abdominal aortic aneurysms (AAA) are localized expansions of the abdominal aorta that develop due to chronic proteolytic disruption of the structural extracellular matrix (ECM) components (elastin and collagen) within the aorta wall. Major limitations in arresting or reversing AAAs lie in naturally poor and aberrant regeneration and repair of elastic matrix structures in the aorta wall. Bone marrow derived mesenchymal stem cells (BM-MSCs) have emerged as a promising regenerative tool and their therapeutic effects are also known to be effected through their paracrine secretions. Extracellular vesicles (EVs) present in these secretions have emerged as critical cellular component in facilitating many therapeutic benefits of MSCs. EV treatment is thus potentially appealing as a stem cell-inspired cell-free approach to avoid possible phenotypic plasticity of MSCs in vivo. In this study, we investigated the thus far unknown effects of BM-MSC derived EVs on vascular elastic matrix repair in the context of AAA treatment. EVs isolated from BM-MSC source were characterized and their pro-regenerative and their anti-proteolytic effects were evaluated on our established in vitro experimental conditions derived from AAA rat model. Our studies revealed the efficacy of BM-MSC derived EVs in attenuating the proteolytic activity and also in imparting elastic matrix regenerative benefits under aneurysmal environment. Interestingly, compared to cell culture conditioned media (CCM), EVs demonstrated superior regenerative and anti-proteolytic benefits in a proteolytic injury culture model of AAA. From these studies, it appears that EVs derived from BM-MSCs could be beneficial in undertaking a reparative effort in AAA induced degeneration of vascular tissue. Statement of Significance Abdominal aortic aneurysms (AAAs) are localized, rupture-prone expansions of the aorta which result from loss of wall flexibility due to enzymatic breakdown of elastic fibers. There are no established alternatives to surgery, which possess high risk for the mostly elderly patients. Our previous studies have established the elastic regenerative and reparative effect of cell culture secretions derived from adult stem cell source. In this study, we propose to isolate extracellular vesicles (exosomes) from these secretions and evaluate their regenerative benefits in AAA smooth muscle cell culture model. This simple and innovative treatment approach has the potential to arrest or reverse AAA growth to rupture, not possible so far.
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Affiliation(s)
- S Sajeesh
- Department of Biomedical Engineering, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, United States
| | - Thomas Broekelman
- Department of Cell Biology and Physiology, Washington University in St. Louis, St. Louis, MO, United States
| | - Robert P Mecham
- Department of Cell Biology and Physiology, Washington University in St. Louis, St. Louis, MO, United States
| | - Anand Ramamurthi
- Department of Biomedical Engineering, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, United States; Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, United States.
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Camardo A, Carney S, Ramamurthi A. Assessing the targeting and fate of cathepsin k antibody-modified nanoparticles in a rat abdominal aortic aneurysm model. Acta Biomater 2020; 112:225-233. [PMID: 32504690 PMCID: PMC10755341 DOI: 10.1016/j.actbio.2020.05.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 05/21/2020] [Accepted: 05/27/2020] [Indexed: 12/24/2022]
Abstract
Abdominal aortic aneurysms (AAAs), a prototypic proteolytic cardiovascular disorder, are localized expansions of the aortal wall. Chronically upregulated and overexpressed proteases irreversibly degrade and disrupt the elastic matrix, which provides stretch and recoil properties to the aortal wall. Adult vascular smooth muscle cells are inherently unable to produce sufficient elastin to form new elastic fibers to naturally repair the aortal wall and the AAA continues to grow until fatal rupture. Surgical intervention is reserved for AAAs with a high risk of rupture, but there is currently no treatment for small, still growing AAAs. We have previously developed matrix regenerative PEG-PLGA nanoparticles (NPs) with pro-elastogenic and anti-proteolytic properties that act synergistically with a released therapeutic. However, strategies are required to effectively deliver these NPs to the disease site to avail of these benefits. We have identified cathepsin K, a protease overexpressed in AAA tissue, as a potential substrate for antibody based active targeting. We sought to assess the safety and biocompatibility of NPs with anti-cathepsin K antibodies conjugated to the NP surface (cat K Ab-NPs) and then assess their biodistribution and retention in both the targeted aorta and non-target organs in a rat AAA model. In this work, we show that cat K Ab-NPs can selectively target the aneurysmal aorta in a rat AAA model. However, there is unwanted NP uptake and retention in non-target organs that can be addressed in future work. Still, cathepsin K is a viable target for active delivery of NPs in an AAA model. STATEMENT OF SIGNIFICANCE: We have previously developed elastic matrix regenerative polymer nanoparticles (NPs), but require strategies to efficiently target the disease site. Antibodies against cathepsin K, an overexpressed protease in abdominal aortic aneurysms, have been conjugated to the NP surface to act as a targeting moiety. In this work, we assessed NP safety and in vivo biodistribution in an aneurysmal rat model and demonstrated positive targeting and retention for up to 2 weeks within the aortal wall.
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Affiliation(s)
- Andrew Camardo
- Department of Biomedical Engineering, The Cleveland Clinic, Cleveland, OH
| | - Sarah Carney
- Department of Biomedical Engineering, The Cleveland Clinic, Cleveland, OH
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH
| | - Anand Ramamurthi
- Department of Biomedical Engineering, The Cleveland Clinic, Cleveland, OH
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH
- Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH
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Munhoz MDAES, Pomini KT, Plepis AMDG, Martins VDCA, Machado EG, de Moraes R, Cunha FB, Santos Junior AR, Camargo Cardoso GB, Duarte MAH, Alcalde MP, Buchaim DV, Buchaim RL, da Cunha MR. Elastin-derived scaffolding associated or not with bone morphogenetic protein (BMP) or hydroxyapatite (HA) in the repair process of metaphyseal bone defects. PLoS One 2020; 15:e0231112. [PMID: 32310975 PMCID: PMC7170266 DOI: 10.1371/journal.pone.0231112] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/16/2020] [Indexed: 02/08/2023] Open
Abstract
Tissue engineering represents a promising alternative for reconstructive surgical procedures especially for the repair of bone defects that do not regenerate spontaneously. The present study aimed to evaluate the effects of the elastin matrix (E24/50 and E96/37) incorporated with hydroxyapatite (HA) or morphogenetic protein (BMP) on the bone repair process in the distal metaphysis of rat femur. The groups were: control group (CG), hydrolyzed elastin matrix at 50°C/24h (E24/50), E24/50 + HA (E24/50/HA), E24/50 + BMP (E24/50/BMP), hydrolyzed elastin matrix at 37°C/96h (E96/37), E96/37 + HA (E96/37/HA), E96/37 + BMP (E96/37/BMP). Macroscopic and radiographic analyses showed longitudinal integrity of the femur in all groups without fractures or bone deformities. Microtomographically, all groups demonstrated partial closure by mineralized tissue except for the E96/37/HA group with hyperdense thin bridge formation interconnecting the edges of the ruptured cortical. Histologically, there was no complete cortical recovery in any group, but partial closure with trabecular bone. In defects filled with biomaterials, no chronic inflammatory response or foreign body type was observed. The mean volume of new bone formed was statistically significant higher in the E96/37/HA and E24/50 groups (71.28 ± 4.26 and 66.40 ± 3.69, respectively) than all the others. In the confocal analysis, it was observed that all groups presented new bone markings formed during the experimental period, being less evident in the CG group. Von Kossa staining revealed intense calcium deposits distributed in all groups. Qualitative analysis of collagen fibers under polarized light showed a predominance of red-orange birefringence in the newly regenerated bone with no difference between groups. It was concluded that the E24/50 and E96/37/HA groups promoted, with greater speed, the bone repair process in the distal metaphysis of rat femur.
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Affiliation(s)
- Marcelo de Azevedo e Sousa Munhoz
- Department of Morphology and Pathology, Medical College of Jundiai, Jundiaí, São Paulo, Brazil
- Interunit Postgraduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil
| | - Karina Torres Pomini
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo (FOB/USP), Bauru, São Paulo, Brazil
| | - Ana Maria de Guzzi Plepis
- Interunit Postgraduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil
- São Carlos Institute of Chemistry, University of São Paulo (USP), São Carlos, São Paulo, Brazil
| | | | - Eduardo Gomes Machado
- Department of Morphology and Pathology, Medical College of Jundiai, Jundiaí, São Paulo, Brazil
- Interunit Postgraduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil
| | - Renato de Moraes
- Department of Morphology and Pathology, Medical College of Jundiai, Jundiaí, São Paulo, Brazil
- Interunit Postgraduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil
| | - Fernando Bento Cunha
- Department of Morphology and Pathology, Medical College of Jundiai, Jundiaí, São Paulo, Brazil
- Interunit Postgraduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil
| | | | - Guinea Brasil Camargo Cardoso
- Materials Engineering Department, Faculty of Mechanical Engineering, State University of Campinas, Campinas, São Paulo, Brazil
- University Center Nossa Senhora do Patrocínio (CEUNSP), Cruzeiro do Sul University (UNICSUL), Itu, São Paulo, Brazil
| | - Marco Antonio Hungaro Duarte
- Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo (FOB/USP), Bauru, São Paulo, Brazil
| | - Murilo Priori Alcalde
- Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo (FOB/USP), Bauru, São Paulo, Brazil
- Health Sciences Center, Sacred Heart University Center (UNISAGRADO), Bauru, São Paulo, Brazil
| | - Daniela Vieira Buchaim
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, University of Marilia (UNIMAR), Marília, São Paulo, Brazil
- Medical School, University Center of Adamantina (UniFAI), Adamantina, São Paulo, Brazil
| | - Rogerio Leone Buchaim
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo (FOB/USP), Bauru, São Paulo, Brazil
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, University of Marilia (UNIMAR), Marília, São Paulo, Brazil
| | - Marcelo Rodrigues da Cunha
- Department of Morphology and Pathology, Medical College of Jundiai, Jundiaí, São Paulo, Brazil
- Interunit Postgraduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil
- University Center Nossa Senhora do Patrocínio (CEUNSP), Cruzeiro do Sul University (UNICSUL), Itu, São Paulo, Brazil
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Dhital S, Vyavahare NR. Nanoparticle-based targeted delivery of pentagalloyl glucose reverses elastase-induced abdominal aortic aneurysm and restores aorta to the healthy state in mice. PLoS One 2020; 15:e0227165. [PMID: 32218565 PMCID: PMC7100957 DOI: 10.1371/journal.pone.0227165] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 02/17/2020] [Indexed: 12/29/2022] Open
Abstract
AIM Abdominal aortic aneurysms (AAA) is a life-threatening weakening and expansion of the abdominal aorta due to inflammatory cell infiltration and gradual degeneration of extracellular matrix (ECM). There are no pharmacological therapies to treat AAA. We tested the hypothesis that nanoparticle (NP) therapy that targets degraded elastin and delivers anti-inflammatory, anti-oxidative, and ECM stabilizing agent, pentagalloyl glucose (PGG) will reverse advance stage aneurysm in an elastase-induced mouse model of AAA. METHOD AND RESULTS Porcine pancreatic elastase (PPE) was applied periadventitially to the infrarenal aorta in mice and AAA was allowed to develop for 14 days. Nanoparticles loaded with PGG (EL-PGG-NPs) were then delivered via IV route at 14-day and 21-day (10 mg/kg of body weight). A control group of mice received no therapy. The targeting of NPs to the AAA site was confirmed with fluorescent dye marked NPs and gold NPs. Animals were sacrificed at 28-d. We found that targeted PGG therapy reversed the AAA by decreasing matrix metalloproteinases MMP-9 and MMP-2, and the infiltration of macrophages in the medial layer. The increase in diameter of the aorta was reversed to healthy controls. Moreover, PGG treatment restored degraded elastic lamina and increased the circumferential strain of aneurysmal aorta to the healthy levels. CONCLUSION Our results support that site-specific delivery of PGG with targeted nanoparticles can be used to treat already developed AAA. Such therapy can reverse inflammatory markers and restore arterial homeostasis.
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Affiliation(s)
- Saphala Dhital
- Department of Bioengineering, Clemson University, Clemson, SC, United States of America
| | - Naren R. Vyavahare
- Department of Bioengineering, Clemson University, Clemson, SC, United States of America
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Farrell K, Simmers P, Mahajan G, Boytard L, Camardo A, Joshi J, Ramamurthi A, Pinet F, Kothapalli CR. Alterations in phenotype and gene expression of adult human aneurysmal smooth muscle cells by exogenous nitric oxide. Exp Cell Res 2019; 384:111589. [PMID: 31473210 DOI: 10.1016/j.yexcr.2019.111589] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 08/24/2019] [Accepted: 08/29/2019] [Indexed: 12/25/2022]
Abstract
Abdominal aortic aneurysms (AAA) are characterized by matrix remodeling, elastin degradation, absence of nitric oxide (NO) signaling, and inflammation, influencing smooth muscle cell (SMC) phenotype and gene expression. Little is known about the biomolecular release and intrinsic biomechanics of human AAA-SMCs. NO delivery could be an attractive therapeutic strategy to restore lost functionality of AAA-SMCs by inhibiting inflammation and cell stiffening. We aim to establish the differences in phenotype and gene expression of adult human AAA-SMCs from healthy SMCs. Based on our previous study which showed benefits of optimal NO dosage delivered via S-Nitrosoglutathione (GSNO) to healthy aortic SMCs, we tested whether such benefits would occur in AAA-SMCs. The mRNA expression of three genes involved in matrix degradation (ACE, ADAMTS5 and ADAMTS8) was significantly downregulated in AAA-SMCs. Total protein and glycosaminoglycans synthesis were higher in AAA-SMCs than healthy-SMCs (p < 0.05 for AAA-vs. healthy- SMC cultures) and was enhanced by GSNO and 3D cultures (p < 0.05 for 3D vs. 2D cultures; p < 0.05 for GSNO vs. non-GSNO cases). Elastin gene expression, synthesis and deposition, desmosine crosslinker levels, and lysyl oxidase (LOX) functional activity were lower, while cell proliferation, iNOS, LOX and fibrillin-1 gene expressions were higher in AAA-SMCs (p < 0.05 between respective cases), with differential benefits from GSNO exposure. GSNO and 3D cultures reduced MMPs -2, -9, and increased TIMP-1 release in AAA-SMC cultures (p < 0.05 for GSNO vs. non-GSNO cultures). AAA-SMCs were inherently stiffer and had smoother surface than healthy SMCs (p < 0.01 in both cases), but GSNO reduced stiffness (~25%; p < 0.01) and increased roughness (p < 0.05) of both cell types. In conclusion, exogenously-delivered NO offers an attractive strategy by providing therapeutic benefits to AAA-SMCs.
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Affiliation(s)
- Kurt Farrell
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, OH, 44141, USA
| | - Phillip Simmers
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, OH, 44141, USA
| | - Gautam Mahajan
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, OH, 44141, USA
| | - Ludovic Boytard
- University of Lille, Inserm U1167, Institut Pasteur de Lille, France
| | - Andrew Camardo
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH, 44141, USA
| | - Jyotsna Joshi
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, OH, 44141, USA
| | - Anand Ramamurthi
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH, 44141, USA
| | - Florence Pinet
- University of Lille, Inserm U1167, Institut Pasteur de Lille, France
| | - Chandrasekhar R Kothapalli
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, OH, 44141, USA.
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Gomel MA, Lee R, Grande-Allen KJ. Comparing the Role of Mechanical Forces in Vascular and Valvular Calcification Progression. Front Cardiovasc Med 2019; 5:197. [PMID: 30687719 PMCID: PMC6335252 DOI: 10.3389/fcvm.2018.00197] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 12/20/2018] [Indexed: 01/07/2023] Open
Abstract
Calcification is a prevalent disease in most fully developed countries and is predominantly observed in heart valves and nearby vasculature. Calcification of either tissue leads to deterioration and, ultimately, failure causing poor quality of life and decreased overall life expectancy in patients. In valves, calcification presents as Calcific Aortic Valve Disease (CAVD), in which the aortic valve becomes stenotic when calcific nodules form within the leaflets. The initiation and progression of these calcific nodules is strongly influenced by the varied mechanical forces on the valve. In turn, the addition of calcific nodules creates localized disturbances in the tissue biomechanics, which affects extracellular matrix (ECM) production and cellular activation. In vasculature, atherosclerosis is the most common occurrence of calcification. Atherosclerosis exhibits as calcific plaque formation that forms in juxtaposition to areas of low blood shear stresses. Research in these two manifestations of calcification remain separated, although many similarities persist. Both diseases show that the endothelial layer and its regulation of nitric oxide is crucial to calcification progression. Further, there are similarities between vascular smooth muscle cells and valvular interstitial cells in terms of their roles in ECM overproduction. This review summarizes valvular and vascular tissue in terms of their basic anatomy, their cellular and ECM components and mechanical forces. Calcification is then examined in both tissues in terms of disease prediction, progression, and treatment. Highlighting the similarities and differences between these areas will help target further research toward disease treatment.
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Seshadri DR, Ramamurthi A. Nanotherapeutics to Modulate the Compromised Micro-Environment for Lung Cancers and Chronic Obstructive Pulmonary Disease. Front Pharmacol 2018; 9:759. [PMID: 30061830 PMCID: PMC6054931 DOI: 10.3389/fphar.2018.00759] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 06/22/2018] [Indexed: 11/13/2022] Open
Abstract
The use of nanomaterials to modulate the tumor microenvironment has great potential to advance outcomes in patients with lung cancer. Nanomaterials can be used to prolong the delivery time of therapeutics enabling their specific targeting to tumors while minimizing and potentially eliminating cytotoxic effects. Using nanomaterials to deliver small-molecule inhibitors for oncogene targeted therapy and cancer immunotherapy while concurrently enabling regeneration of the extracellular matrix could enhance our therapeutic reach and improve outcomes for patients with non-small cell lung cancer (NSCLC) and chronic obstructive pulmonary disease (COPD). The objective of this review is to highlight the role nanomedicines play in improving and reversing adverse outcomes in the tumor microenvironment for advancing treatments for targeting both diseases.
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Affiliation(s)
- Dhruv R. Seshadri
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH, United States
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
| | - Anand Ramamurthi
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH, United States
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
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Cruz-Vargas J, Belmont-Bernal F, Vera-De la Garza CG, Pérez Mazariego JL, Gómez González RW, Henao-Holguín LV, Rojas-Montoya ID, Guadarrama P. Accelerated one-pot synthesis of coated magnetic nanoparticles from iron(ii) as a single precursor. NEW J CHEM 2018. [DOI: 10.1039/c8nj02270d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
New one-pot synthesis involving a non-conventional stirring regime to obtain coated magnetic nanoparticles characterized by physical and chemical techniques.
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Affiliation(s)
- Jonathan Cruz-Vargas
- Instituto de Investigaciones en Materiales
- Laboratorio de Materiales Funcionales Orgánicos
- Universidad Nacional Autónoma de México
- Coyoacán
- Mexico
| | - Fernando Belmont-Bernal
- Instituto de Investigaciones en Materiales
- Laboratorio de Materiales Funcionales Orgánicos
- Universidad Nacional Autónoma de México
- Coyoacán
- Mexico
| | - César Gabriel Vera-De la Garza
- Instituto de Investigaciones en Materiales
- Laboratorio de Materiales Funcionales Orgánicos
- Universidad Nacional Autónoma de México
- Coyoacán
- Mexico
| | | | | | | | - Ivan Dario Rojas-Montoya
- Facultad de Química
- Departamento de Química Inorgánica y Nuclear
- Universidad Nacional Autónoma de México
- Coyoacán
- Mexico
| | - Patricia Guadarrama
- Instituto de Investigaciones en Materiales
- Laboratorio de Materiales Funcionales Orgánicos
- Universidad Nacional Autónoma de México
- Coyoacán
- Mexico
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Kajbafzadeh AM, Abbasioun R, Sabetkish S, Sabetkish N, Rahmani P, Tavakkolitabassi K, Arshadi H. Future Prospects for Human Tissue Engineered Urethra Transplantation: Decellularization and Recellularization-Based Urethra Regeneration. Ann Biomed Eng 2017; 45:1795-1806. [PMID: 28536786 DOI: 10.1007/s10439-017-1857-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 05/17/2017] [Indexed: 01/03/2023]
Abstract
To evaluate the histological characteristics of decellularized human urethra after transplantation into the rat omentum and compare in vivo cell seeding with perfusion-based and cell sheet urethral regeneration. Eight adult human male urethras accompanied with the surrounding corpus spongiosum were obtained. The tissues were decellularized with detergent-based method. The efficacy of decellularization and extracellular matrix preservation was evaluated by several techniques. Decellularized scaffolds were transplanted into the omentum of 12 male rats and located into the scrotum. Biopsies were taken 1, 3, and 6 months postoperatively to assess the natural recellularization. Mesenchymal stem cells obtained from preputial tissue were seeded with perfusion-based and cell sheet techniques as well. Immunohistochemical staining with α-actin, cytokeratin AE1/AE3, synaptophysin, and CD31 antibodies were performed. Removal of nuclear components and preservation of biomechanical properties was confirmed. In-vivo recellularization revealed promising results in progressive angiogenesis and cell seeding of epithelium-like cells in the lining of the urethra as well as smooth muscle cells in the wall structure. In-vitro urethral regeneration revealed that cell sheet engineering was the technique of choice compared to perfusion-based technique. This study may paw the road for clinical application of acellular urethral matrix with the surrounding corpus spongiosum in urological reconstructive surgery.
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Affiliation(s)
- Abdol-Mohammad Kajbafzadeh
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran.
| | - Reza Abbasioun
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
| | - Shabnam Sabetkish
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
| | - Nastaran Sabetkish
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
| | - Parvin Rahmani
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
| | - Kamyar Tavakkolitabassi
- Department of Urology and Renal Transplantation, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Arshadi
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
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Sivaraman B, Swaminathan G, Moore L, Fox J, Seshadri D, Dahal S, Stoilov I, Zborowski M, Mecham R, Ramamurthi A. Magnetically-responsive, multifunctional drug delivery nanoparticles for elastic matrix regenerative repair. Acta Biomater 2017; 52:171-186. [PMID: 27884774 DOI: 10.1016/j.actbio.2016.11.048] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 11/14/2016] [Accepted: 11/20/2016] [Indexed: 12/23/2022]
Abstract
Arresting or regressing growth of abdominal aortic aneurysms (AAAs), localized expansions of the abdominal aorta are contingent on inhibiting chronically overexpressed matrix metalloproteases (MMPs)-2 and -9 that disrupt elastic matrix within the aortic wall, concurrent with providing a stimulus to augmenting inherently poor auto-regeneration of these matrix structures. In a recent study we demonstrated that localized, controlled and sustained delivery of doxycycline (DOX; a tetracycline-based antibiotic) from poly(lactic-co-glycolic acid) nanoparticles (PLGA NPs), enhances elastic matrix deposition and MMP-inhibition at a fraction of the therapeutically effective oral dose. The surface functionalization of these NPs with cationic amphiphiles, which enhances their arterial uptake, was also shown to have pro-matrix regenerative and anti-MMP effects independent of the DOX. Based on the hypothesis that the incorporation of superparamagnetic iron oxide NPs (SPIONs) within these PLGA NPs would enhance their targetability to the AAA site under an applied external magnetic field, we sought to evaluate the functional effects of NPs co-encapsulating DOX and SPIONs (DOX-SPION NPs) on elastic matrix regeneration and MMP synthesis/activity in vitro within aneurysmal smooth muscle cell (EaRASMC) cultures. The DOX-SPION NPs were mobile under an applied external magnetic field, while enhancing elastic matrix deposition 1.5-2-fold and significantly inhibiting MMP-2 synthesis and MMP-2 and -9 activities, compared to NP-untreated control cultures. These results illustrate that the multifunctional benefits of NPs are maintained following SPION co-incorporation. Additionally, preliminary studies carried out demonstrated enhanced targetability of SPION-loaded NPs within proteolytically-disrupted porcine carotid arteries ex vivo, under the influence of an applied external magnetic field. Thus, this dual-agent loaded NP system proffers a potential non-surgical option for treating small growing AAAs, via controlled and sustained drug release from multifunctional, targetable nanocarriers. STATEMENT OF SIGNIFICANCE Proactive screening of high risk elderly patients now enables early detection of abdominal aortic aneurysms (AAAs). There are no established drug-based therapeutic alternatives to surgery for AAAs, which is unsuitable for many elderly patients, and none which can achieve restore disrupted and lost elastic matrix in the AAA wall, which is essential to achieve growth arrest or regression. We have developed a first generation design of polymer nanoparticles (NPs) for AAA tissue localized delivery of doxycycline, a modified tetracycline drug at low micromolar doses at which it provides both pro-elastogenic and anti-proteolytic benefits that can augment elastic matrix regenerative repair. The nanocarriers themselves are also uniquely chemically functionalized on their surface to also provide them pro-elastin-regenerative & anti-matrix degradative properties. To provide an active driving force for efficient uptake of intra-lumenally infused NPs to the AAA wall, in this work, we have rendered our polymer NPs mobile in an applied magnetic field via co-incorporation of super-paramagnetic iron oxide NPs. We demonstrate that such modifications significantly improve wall uptake of the NPs with no significant changes to their physical properties and regenerative benefits. Such NPs can potentially stimulate structural repair in the AAA wall following one time infusion to delay or prevent AAA growth to rupture. The therapy can provide a non-surgical treatment option for high risk AAA patients.
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Simmers P, Gishto A, Vyavahare N, Kothapalli CR. Nitric oxide stimulates matrix synthesis and deposition by adult human aortic smooth muscle cells within three-dimensional cocultures. Tissue Eng Part A 2015; 21:1455-70. [PMID: 25597545 DOI: 10.1089/ten.tea.2014.0363] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Vascular diseases are characterized by the over-proliferation and migration of aortic smooth muscle cells (SMCs), and degradation of extracellular matrix (ECM) within the vessel wall, leading to compromise in cell-cell and cell-matrix signaling pathways. Tissue engineering approaches to regulate SMC over-proliferation and enhance healthy ECM synthesis showed promise, but resulted in low crosslinking efficiency. Here, we report the benefits of exogenous nitric oxide (NO) cues, delivered from S-Nitrosoglutathione (GSNO), to cell proliferation and matrix deposition by adult human aortic SMCs (HA-SMCs) within three-dimensional (3D) biomimetic cocultures. A coculture platform with two adjacent, permeable 3D culture chambers was developed to enable paracrine signaling between vascular cells. HA-SMCs were cultured in these chambers within collagen hydrogels, either alone or in the presence of human aortic endothelial cells (HA-ECs) cocultures, and exogenously supplemented with varying GSNO dosages (0-100 nM) for 21 days. Results showed that EC cocultures stimulated SMC proliferation within GSNO-free cultures. With increasing GSNO concentration, HA-SMC proliferation decreased in the presence or absence of EC cocultures, while HA-EC proliferation increased. GSNO (100 nM) significantly enhanced the protein amounts synthesized by HA-SMCs, in the presence or absence of EC cocultures, while lower dosages (1-10 nM) offered marginal benefits. Multi-fold increases in the synthesis and deposition of elastin, glycosaminoglycans, hyaluronic acid, and lysyl oxidase crosslinking enzyme (LOX) were noted at higher GSNO dosages, and coculturing with ECs significantly furthered these trends. Similar increases in TIMP-1 and MMP-9 levels were noted within cocultures with increasing GSNO dosages. Such increases in matrix synthesis correlated with NO-stimulated increases in endothelial nitric oxide synthase (eNOS) and inducible nitric oxide synthase (iNOS) expression within EC and SMC cultures, respectively. Results attest to the benefits of delivering NO cues to suppress SMC proliferation and promote robust ECM synthesis and deposition by adult human SMCs, with significant applications in tissue engineering, biomaterial scaffold development, and drug delivery.
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Affiliation(s)
- Phillip Simmers
- 1 Department of Chemical and Biomedical Engineering, Cleveland State University , Cleveland, Ohio
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Ribeiro-Filho LA, Sievert KD. Acellular matrix in urethral reconstruction. Adv Drug Deliv Rev 2015; 82-83:38-46. [PMID: 25477304 DOI: 10.1016/j.addr.2014.11.019] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 11/21/2014] [Accepted: 11/24/2014] [Indexed: 01/10/2023]
Abstract
The treatment of severe urethral stenosis has always been a challenge even for skilled urologists. Classic urethroplasty, skin flaps and buccal mucosa grafting may not be used for long and complex strictures. In the quest for an ideal urethral substitute, acellular scaffolds have demonstrated the ability to induce tissue regeneration layer by layer. After several experimental studies, the use of acellular matrices for urethral reconstruction has become a clinical reality over the last decade. In this review we analyze advantages and limitations of both biological and polymeric scaffolds that have been reported in experimental and human studies. Important aspects such as graft extension, surgical technique and cell-seeding versus cell-free grafts will be discussed.
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Sylvester A, Sivaraman B, Deb P, Ramamurthi A. Nanoparticles for localized delivery of hyaluronan oligomers towards regenerative repair of elastic matrix. Acta Biomater 2013; 9:9292-302. [PMID: 23917150 DOI: 10.1016/j.actbio.2013.07.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/17/2013] [Accepted: 07/24/2013] [Indexed: 10/26/2022]
Abstract
Abdominal aortic aneurysms (AAAs) are rupture-prone progressive dilations of the infrarenal aorta due to a loss of elastic matrix that lead to weakening of the aortic wall. Therapies to coax biomimetic regenerative repair of the elastic matrix by resident, diseased vascular cells may thus be useful to slow, arrest or regress AAA growth. Hyaluronan oligomers (HA-o) have been shown to induce elastic matrix synthesis by healthy and aneurysmal rat aortic smooth muscle cells (SMCs) in vitro but only via exogenous dosing, which potentially has side-effects and limitations to in vivo delivery towards therapy. In this paper, we describe the development of HA-o loaded poly(lactide-co-glycolide) nanoparticles (NPs) for targeted, controlled and sustained delivery of HA-o towards the elastogenic induction of aneurysmal rat aortic SMCs. These NPs were able to deliver HA-o over an extended period (>30 days) at previously determined elastogenic doses (0.2-20 μg ml(-1)). HA-o released from the NPs led to dose-dependent increases in elastic matrix synthesis, and the recruitment and activity of lysyl oxidase, the enzyme which cross-links elastin precursor molecules into mature fibers/matrix. Therefore, we were able to successfully develop a nanoparticle-based system for controlled and sustained HA-o delivery for the in vitro elastogenic induction of aneurysmal rat aortic smooth muscle cells.
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