1
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Garau Paganella L, Badolato A, Labouesse C, Fischer G, Sänger CS, Kourouklis A, Giampietro C, Werner S, Mazza E, Tibbitt MW. Variations in fluid chemical potential induce fibroblast mechano-response in 3D hydrogels. BIOMATERIALS ADVANCES 2024; 163:213933. [PMID: 38972277 DOI: 10.1016/j.bioadv.2024.213933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/28/2024] [Accepted: 06/25/2024] [Indexed: 07/09/2024]
Abstract
Mechanical deformation of skin creates variations in fluid chemical potential, leading to local changes in hydrostatic and osmotic pressure, whose effects on mechanobiology remain poorly understood. To study these effects, we investigate the specific influences of hydrostatic and osmotic pressure on primary human dermal fibroblasts in three-dimensional hydrogel culture models. Cyclic hydrostatic pressure and hyperosmotic stress enhanced the percentage of cells expressing the proliferation marker Ki67 in both collagen and PEG-based hydrogels. Osmotic pressure also activated the p38 MAPK stress response pathway and increased the expression of the osmoresponsive genes PRSS35 and NFAT5. When cells were cultured in two-dimension (2D), no change in proliferation was observed with either hydrostatic or osmotic pressure. Furthermore, basal, and osmotic pressure-induced expression of osmoresponsive genes differed in 2D culture versus 3D hydrogels, highlighting the role of dimensionality in skin cell mechanotransduction and stressing the importance of 3D tissue-like models that better replicate in vivo conditions. Overall, these results indicate that fluid chemical potential changes affect dermal fibroblast mechanobiology, which has implications for skin function and for tissue regeneration strategies.
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Affiliation(s)
- Lorenza Garau Paganella
- Macromolecular Engineering Laboratory, Institute of Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland; Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Asia Badolato
- Macromolecular Engineering Laboratory, Institute of Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Céline Labouesse
- Macromolecular Engineering Laboratory, Institute of Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Gabriel Fischer
- Macromolecular Engineering Laboratory, Institute of Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Catharina S Sänger
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Andreas Kourouklis
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Costanza Giampietro
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland; EMPA, Swiss Federal Laboratories for Material Science and Technologies, Dubendorf, Switzerland
| | - Sabine Werner
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Edoardo Mazza
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland; EMPA, Swiss Federal Laboratories for Material Science and Technologies, Dubendorf, Switzerland
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, Institute of Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland.
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2
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Bai K, Hou Y, Zhang Z, Yuan F, Huang X, Liu P, Zou X, Sun J. A New Rat Model of Sacral Cord Injury Producing a Neurogenic Bladder and Its Functional and Mechanistic Studies. Biomolecules 2024; 14:1141. [PMID: 39334907 PMCID: PMC11429646 DOI: 10.3390/biom14091141] [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: 08/16/2024] [Revised: 09/06/2024] [Accepted: 09/07/2024] [Indexed: 09/30/2024] Open
Abstract
Sacral spinal cord injury (SSCI) can disrupt bladder neuromodulation and impair detrusor function. Current studies provide limited information on the histologic and genetic changes associated with SSCI-related neurogenic lower urinary tract dysfunction (NLUTD), resulting in few treatment options. This study aimed to establish a simple animal model of SSCI to better understand the disease progression. Ninety 8-week-old Sprague-Dawley (SD) rats were randomly separated into sham operation and SSCI groups. The SSCI group underwent sacral spinal cord injury, while the sham group did not. Urodynamic and histological assessments were conducted at various intervals (1, 2, 3, 4, and 6 weeks) post-injury to elucidate the disease process. Urodynamic examinations revealed significant bladder dysfunction in the SSCI group compared to the sham group, stabilizing around 3-4 weeks post-injury. Histological examination, including hematoxylin-eosin and Masson's trichrome staining, correlated these functional changes with bladder microstructural alterations. RNA-seq was performed on bladder tissues from the sham group and SSCI group at 6 weeks to identify differentially expressed genes and pathways. Selected genes were further analyzed using polymerase chain reaction (PCR). The findings indicated a pronounced inflammatory response in the first 2 weeks post-SSCI, progressing to bladder fibrosis at 3-4 weeks. In conclusion, this study presents a reliable, reproducible, and straightforward SSCI model, providing insights into bladder functional and morphological alterations post-SSCI and laying the groundwork for future therapeutic research.
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Affiliation(s)
- Kaiping Bai
- Department of Urology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, No. 1678 Dongfang Road, Pudong New Area, Shanghai 200127, China
| | - Yanping Hou
- Department of Urology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, No. 1678 Dongfang Road, Pudong New Area, Shanghai 200127, China
| | - Zhiyuan Zhang
- Department of Urology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, No. 1678 Dongfang Road, Pudong New Area, Shanghai 200127, China
| | - Fei Yuan
- Department of Urology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, No. 1678 Dongfang Road, Pudong New Area, Shanghai 200127, China
| | - Xiaoling Huang
- Department of Urology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, No. 1678 Dongfang Road, Pudong New Area, Shanghai 200127, China
| | - Pengtao Liu
- Department of Urology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, No. 1678 Dongfang Road, Pudong New Area, Shanghai 200127, China
| | - Xiangyu Zou
- Department of Urology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, No. 1678 Dongfang Road, Pudong New Area, Shanghai 200127, China
| | - Jie Sun
- Department of Urology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, No. 1678 Dongfang Road, Pudong New Area, Shanghai 200127, China
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3
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Kim OH, Jeon TJ, So YI, Shin YK, Lee HJ. Applications of Bioinspired Platforms for Enhancing Immunomodulatory Function of Mesenchymal Stromal Cells. Int J Stem Cells 2023; 16:251-259. [PMID: 37385634 PMCID: PMC10465339 DOI: 10.15283/ijsc22211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 03/24/2023] [Accepted: 03/28/2023] [Indexed: 07/01/2023] Open
Abstract
Mesenchymal stromal cells (MSCs) have attracted scientific and medical interest due to their self-renewing properties, pluripotency, and paracrine function. However, one of the main limitations to the clinical application of MSCs is their loss of efficacy after transplantation in vivo. Various bioengineering technologies to provide stem cell niche-like conditions have the potential to overcome this limitation. Here, focusing on the stem cell niche microenvironment, studies to maximize the immunomodulatory potential of MSCs by controlling biomechanical stimuli, including shear stress, hydrostatic pressure, stretch, and biophysical cues, such as extracellular matrix mimetic substrates, are discussed. The application of biomechanical forces or biophysical cues to the stem cell microenvironment will be beneficial for enhancing the immunomodulatory function of MSCs during cultivation and overcoming the current limitations of MSC therapy.
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Affiliation(s)
- Ok-Hyeon Kim
- Department of Anatomy and Cell Biology, College of Medicine, Chung-Ang University, Seoul, Korea
| | - Tae Jin Jeon
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, Korea
| | - Young In So
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, Korea
| | - Yong Kyoo Shin
- Department of Pharmacology, College of Medicine, Chung-Ang University, Seoul, Korea
| | - Hyun Jung Lee
- Department of Anatomy and Cell Biology, College of Medicine, Chung-Ang University, Seoul, Korea
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, Korea
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4
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Wang J, Ren L, Liu X, Xu W, Liu M, Hu P, Wang T, Liu J, Ling Q. Transcriptomics Reveals Molecular Features of the Bilateral Pelvic Nerve Injury Rat Model of Detrusor Underactivity. Biomolecules 2023; 13:1260. [PMID: 37627325 PMCID: PMC10452637 DOI: 10.3390/biom13081260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/12/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023] Open
Abstract
The pathogenesis of detrusor underactivity (DU) is unclear, and the available therapeutic effects are unsatisfactory. We propose to find key molecules and pathways related to DU based on transcriptome sequencing. A rat model of bilateral pelvic nerve injury (BPNI) was established. Bladder tissues from the sham-operated group, 3 and 28 days after BPNI mapping, were taken for urodynamics, histopathology, and RNA-seq. An enrichment analysis of the screened differential expression genes was performed. Three days after BPNI, the results showed urodynamic features of overflow incontinence, while there was a recovery at 28 days after the operation. Masson staining revealed collagen deposition accompanied by progressive thickening of the smooth muscle layer as DU progressed. RNA-seq results suggested that a total of 1808 differentially expressed genes (DEGs) differed among the groups. RNA-seq and subsequent analysis confirmed that the cell cycle and immune response were significantly activated 3 days after BPNI, while extracellular matrix remodeling occurred 28 days after BPNI. Partial DEGs and pathways were verified by qRT-PCR. Validation of key proteins involved in cell cycle, inflammation, and fibrosis was performed by immunohistochemical staining and western blot, respectively. These molecular expression patterns at different time points after BPNI injury provide valuable insights into the search for therapeutic targets for DU.
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Affiliation(s)
- Jiaxin Wang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (J.W.)
- Institute of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Lida Ren
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (J.W.)
- Institute of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xinqi Liu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (J.W.)
- Institute of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Wenchao Xu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (J.W.)
- Institute of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Man Liu
- Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Peng Hu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (J.W.)
- Institute of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Tao Wang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (J.W.)
- Institute of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jihong Liu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (J.W.)
- Institute of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Qing Ling
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; (J.W.)
- Institute of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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5
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Szmelter AH, Venturini G, Abbed RJ, Acheampong MO, Eddington DT. Emulating clinical pressure waveforms in cell culture using an Arduino-controlled millifluidic 3D-printed platform for 96-well plates. LAB ON A CHIP 2023; 23:793-802. [PMID: 36727452 PMCID: PMC9979247 DOI: 10.1039/d2lc00970f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
High blood pressure is the primary risk factor for heart disease, the leading cause of death globally. Despite this, current methods to replicate physiological pressures in vitro remain limited in sophistication and throughput. Single-chamber exposure systems allow for only one pressure condition to be studied at a time and the application of dynamic pressure waveforms is currently limited to simple sine, triangular, or square waves. Here, we introduce a high-throughput hydrostatic pressure exposure system for 96-well plates. The platform can deliver a fully-customizable pressure waveform to each column of the plate, for a total of 12 simultaneous conditions. Using clinical waveform data, we are able to replicate real patients' blood pressures as well as other medically-relevant pressures within the body and have assembled a small patient-derived waveform library of some key physiological locations. As a proof of concept, human umbilical vein endothelial cells (HUVECs) survived and proliferated for 3 days under a wide range of static and dynamic physiologic pressures ranging from 10 mm Hg to 400 mm Hg. Interestingly, pathologic and supraphysiologic pressure exposures did not inhibit cell proliferation. By integrating with, rather than replacing, ubiquitous lab cultureware it is our hope that this device will facilitate the incorporation of hydrostatic pressure into standard cell culture practice.
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Affiliation(s)
- Adam H Szmelter
- Department of Biomedical Engineering, University of Illinois at Chicago, 835 S. Wolcott Ave., Chicago, IL, USA.
| | - Giulia Venturini
- Department of Biomedical Engineering, University of Illinois at Chicago, 835 S. Wolcott Ave., Chicago, IL, USA.
| | - Rana J Abbed
- Department of Biomedical Engineering, University of Illinois at Chicago, 835 S. Wolcott Ave., Chicago, IL, USA.
| | - Manny O Acheampong
- Department of Biomedical Engineering, University of Illinois at Chicago, 835 S. Wolcott Ave., Chicago, IL, USA.
| | - David T Eddington
- Department of Biomedical Engineering, University of Illinois at Chicago, 835 S. Wolcott Ave., Chicago, IL, USA.
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6
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Purkayastha P, Jaiswal MK, Lele TP. Molecular cancer cell responses to solid compressive stress and interstitial fluid pressure. Cytoskeleton (Hoboken) 2021; 78:312-322. [PMID: 34291887 DOI: 10.1002/cm.21680] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 01/19/2023]
Abstract
Alterations to the mechanical properties of the microenvironment are a hallmark of cancer. Elevated mechanical stresses exist in many solid tumors and elicit responses from cancer cells. Uncontrolled growth in confined environments gives rise to elevated solid compressive stress on cancer cells. Recruitment of leaky blood vessels and an absence of functioning lymphatic vessels causes a rise in the interstitial fluid pressure. Here we review the role of the cancer cell cytoskeleton and the nucleus in mediating both the initial and adaptive cancer cell response to these two types of mechanical stresses. We review how these mechanical stresses alter cancer cell functions such as proliferation, apoptosis, and migration.
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Affiliation(s)
- Purboja Purkayastha
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA
| | - Manish K Jaiswal
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, USA
| | - Tanmay P Lele
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA.,Department of Biomedical Engineering, Texas A&M University, College Station, Texas, USA.,Department of Translational Medical Sciences, Texas A&M University, Houston, Texas, USA
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7
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BOO induces fibrosis and EMT in urothelial cells which can be recapitulated in vitro through elevated storage and voiding pressure cycles. Int Urol Nephrol 2021; 53:2007-2018. [PMID: 34232473 DOI: 10.1007/s11255-021-02942-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 06/30/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE To determine the unique contributions from elevated voiding and storage pressures in the development of fibrosis and the epithelial-to-mesenchymal transition (EMT) in urothelial cells, and how progressive BOO pressure cycling is an important mechanical cue leading to these pathological changes. MATERIALS AND METHODS Urothelial cells isolated from control, SHAM, 2 (acute)- or 6 (chronic)-week BOO rats treated with an inflammasome inhibitor or no drug. Total RNA was isolated and RT-PCR was conducted with custom primers for pro-fibrotic and EMT genes. In separate experiments, a rat urothelial cell line was exposed to cyclic pressure regimes characteristic of acute and chronic BOO in the presence or absence of an inflammasome inhibitor. Following exposure, RT-PCR was conducted, collagen content was determined and intracellular caspase-1 activity was measured. RESULTS Urothelial cells isolated from acute and chronic BOO rat models demonstrated expression of pro-fibrotic and EMT genes. Similarly, MYP3 rat urothelial cells subjected to pressure cycling regimes that reflect intravesical pressures in the acute or chronic BOO bladder also demonstrated increased expression of pro-fibrotic and EMT genes, along with elevated soluble collagen. Treatment with inflammasome inhibitors reduced expression of pro-fibrotic genes in the rat model and pressure cycling model but had a limited effect on EMT. CONCLUSION These results indicate that acute and chronic BOO pressure cycling are essential in the initiation and progression of fibrosis in the bladder via the NLRP3 inflammasome, but also provide new evidence that there is also an alternative NLRP3-independent pathway leading to EMT and fibrosis.
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8
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Li Y, Konstantopoulos K, Zhao R, Mori Y, Sun SX. The importance of water and hydraulic pressure in cell dynamics. J Cell Sci 2020; 133:133/20/jcs240341. [PMID: 33087485 DOI: 10.1242/jcs.240341] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
All mammalian cells live in the aqueous medium, yet for many cell biologists, water is a passive arena in which proteins are the leading players that carry out essential biological functions. Recent studies, as well as decades of previous work, have accumulated evidence to show that this is not the complete picture. Active fluxes of water and solutes of water can play essential roles during cell shape changes, cell motility and tissue function, and can generate significant mechanical forces. Moreover, the extracellular resistance to water flow, known as the hydraulic resistance, and external hydraulic pressures are important mechanical modulators of cell polarization and motility. For the cell to maintain a consistent chemical environment in the cytoplasm, there must exist an intricate molecular system that actively controls the cell water content as well as the cytoplasmic ionic content. This system is difficult to study and poorly understood, but ramifications of which may impact all aspects of cell biology from growth to metabolism to development. In this Review, we describe how mammalian cells maintain the cytoplasmic water content and how water flows across the cell surface to drive cell movement. The roles of mechanical forces and hydraulic pressure during water movement are explored.
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Affiliation(s)
- Yizeng Li
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.,Department of Mechanical Engineering, Kennesaw State University. Marietta, GA 30060, USA
| | - Konstantinos Konstantopoulos
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.,Institute of NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Runchen Zhao
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.,Institute of NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Yoichiro Mori
- Department of Mathematics and Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sean X Sun
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA .,Institute of NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.,Center for Cell Dynamics, Johns Hopkins University, Baltimore, MD 21218, USA
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9
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Gooch KJ, Firstenberg MS, Shrefler BS, Scandling BW. Biomechanics and Mechanobiology of Saphenous Vein Grafts. J Biomech Eng 2019; 140:2666246. [PMID: 29222565 DOI: 10.1115/1.4038705] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Indexed: 11/08/2022]
Abstract
Within several weeks of use as coronary artery bypass grafts (CABG), saphenous veins (SV) exhibit significant intimal hyperplasia (IH). IH predisposes vessels to thrombosis and atherosclerosis, the two major modes of vein graft failure. The fact that SV do not develop significant IH in their native venous environment coupled with the rapidity with which they develop IH following grafting into the arterial circulation suggests that factors associated with the isolation and preparation of SV and/or differences between the venous and arterial environments contribute to disease progression. There is strong evidence suggesting that mechanical trauma associated with traditional techniques of SV preparation can significantly damage the vessel and might potentially reduce graft patency though modern surgical techniques reduces these injuries. In contrast, it seems possible that modern surgical technique, specifically endoscopic vein harvest, might introduce other mechanical trauma that could subtly injure the vein and perhaps contribute to the reduced patency observed in veins harvested using endoscopic techniques. Aspects of the arterial mechanical environment influence remodeling of SV grafted into the arterial circulation. Increased pressure likely leads to thickening of the medial wall but its role in IH is less clear. Changes in fluid flow, including increased average wall shear stress, may reduce IH while disturbed flow likely increase IH. Nonmechanical stimuli, such as exposure to arterial levels of oxygen, may also have a significant but not widely recognized role in IH. Several potentially promising approaches to alter the mechanical environment to improve graft patency are including extravascular supports or altered graft geometries are covered.
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Affiliation(s)
- Keith J Gooch
- Department of Biomedical Engineering, The Ohio State University, 290 Bevis Hall 1080 Carmack Drive, Columbus, OH 43210.,Davis Heart Lung Research Institute, The Ohio State University, Columbus, OH 43210 e-mail:
| | - Michael S Firstenberg
- Surgery and Integrative Medicine, Northeast Ohio Medical Universities, Akron, OH 44309
| | - Brittany S Shrefler
- Department of Internal Medicine, The Ohio State University, Columbus, OH 43210
| | - Benjamin W Scandling
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210
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10
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Liu S, Tao R, Wang M, Tian J, Genin GM, Lu TJ, Xu F. Regulation of Cell Behavior by Hydrostatic Pressure. APPLIED MECHANICS REVIEWS 2019; 71:0408031-4080313. [PMID: 31700195 PMCID: PMC6808007 DOI: 10.1115/1.4043947] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 05/18/2019] [Indexed: 06/10/2023]
Abstract
Hydrostatic pressure (HP) regulates diverse cell behaviors including differentiation, migration, apoptosis, and proliferation. Abnormal HP is associated with pathologies including glaucoma and hypertensive fibrotic remodeling. In this review, recent advances in quantifying and predicting how cells respond to HP across several tissue systems are presented, including tissues of the brain, eye, vasculature and bladder, as well as articular cartilage. Finally, some promising directions on the study of cell behaviors regulated by HP are proposed.
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Affiliation(s)
- Shaobao Liu
- State Key Laboratory of Mechanics andControl of Mechanical Structures,
Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China
- The Key Laboratory of Biomedical InformationEngineering of Ministry of Education,
School of Life Science and Technology,
Xi'an Jiaotong University,
Xi'an 710049, China
- Department of Biomedical Engineering,Bioinspired Engineering and Biomechanics Center (BEBC),
Xi'an Jiaotong University,
Xi'an 710049, China
| | - Ru Tao
- The Key Laboratory of Biomedical InformationEngineering of Ministry of Education,
School of Life Science and Technology,
Xi'an Jiaotong University,
Xi'an 710049, China
- Department of Biomedical Engineering,Bioinspired Engineering and Biomechanics Center (BEBC),
Xi'an Jiaotong University,
Xi'an 710049, China
| | - Ming Wang
- The Key Laboratory of Biomedical InformationEngineering of Ministry of Education,
School of Life Science and Technology,
Xi'an Jiaotong University,
Xi'an 710049, China
- Department of Biomedical Engineering,Bioinspired Engineering and Biomechanics Center (BEBC),
Xi'an Jiaotong University,
Xi'an 710049, China
| | - Jin Tian
- Department of Biomedical Engineering,Bioinspired Engineering and Biomechanics Center (BEBC),
Xi'an Jiaotong University,
Xi'an 710049, China
- State Key Laboratory for Strength andVibration of Mechanical Structures,
Xi'an Jiaotong University,
Xi'an 710049, China
| | - Guy M. Genin
- The Key Laboratory of Biomedical Information
Engineering of Ministry of Education,
School of Life Science and Technology,
Xi'an Jiaotong University,
Xi'an 710049, China
- Department of Biomedical Engineering,Bioinspired Engineering and Biomechanics Center (BEBC),
Xi'an Jiaotong University,
Xi'an 710049, China
- Department of Mechanical Engineering &
Materials Science,
National Science Foundation Science and
Technology Center for Engineering Mechanobiology,
Washington University,
St. Louis, MO 63130
| | - Tian Jian Lu
- State Key Laboratory of Mechanics andControl of Mechanical Structures,
Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China
- Department of Structural Engineering & Mechanics,
Nanjing Center for Multifunctional LightweightMaterials and Structures,
Nanjing University of Aeronautics and Astronautics,
Nanjing 21006, China;
State Key Laboratory for Strength andVibration of Mechanical Structures,
Xi'an Jiaotong University,
Xi'an 710049, China
| | - Feng Xu
- The Key Laboratory of Biomedical InformationEngineering of Ministry of Education,
School of Life Science and Technology,
Xi'an Jiaotong University,
Xi'an 710049, China
- Department of Biomedical Engineering,Bioinspired Engineering and Biomechanics Center (BEBC),
Xi'an Jiaotong University,
Xi'an 710049, China
e-mail:
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11
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Lai J, Ai J, Luo D, Jin T, Liao B, Zhou L, Feng S, Jin X, Li H, Wang K. β-Adrenoceptor signaling regulates proliferation and contraction of human bladder smooth muscle cells under pathological hydrostatic pressure. J Cell Biochem 2019; 120:17872-17886. [PMID: 31161623 DOI: 10.1002/jcb.29056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 04/26/2019] [Accepted: 04/30/2019] [Indexed: 02/05/2023]
Abstract
BACKGROUND Partial bladder outlet obstruction (PBOO) promotes bladder detrusor hyperplasia, increases bladder pressure, and decreases bladder compliance. To extensively explore its underlying mechanism, our study aimed to investigate the effect of pathological hydrostatic pressure on human bladder smooth muscle cell (hBSMC) proliferation and contraction through β-adrenoceptor (ADRB) signaling in vitro. METHODS hBSMCs were subjected to pathological hydrostatic pressure (100 cm H2 O) to investigate the effect of ADRBs on the proliferation and contraction of hBSMCs treated with its agonists and/or antagonists. RESULTS Firstly, exposure to 100 cm H2 O hydrostatic pressure significantly upregulated the expression of α-smooth muscle actin (α-SMA) in hBSMCs at 6 hours, and promoted cell proliferation at 24 hours. When subjected to hydrostatic pressure alone, hBSMCs treated with ADRB2 and ADRB3 agonists for 6 hours inhibited α-SMA expression compared with untreated cells. By contrast, hBSMCs treated with ADRB2 agonists for 24 hours suppressed cell proliferation compared with untreated cells. The two classical pathways of ADRB, protein kinase A (PKA), and exchange factor directly activated by cAMP (EPAC) inhibited the contraction of hBSMCs under hydrostatic pressure via regulating mothers against decapentaplegic homolog 2 (SMAD2) activity. The proliferation of hBSMCs was mainly regulated by the EPAC pathway through extracellular signal-regulated kinase 1/2 (ERK1/2) activity. CONCLUSION The contraction of hBSMCs under hydrostatic pressure was regulated by ADRB2 and ADRB3 via the PKA/EPAC-SMAD2 pathway, and the proliferation of hBSMCs was regulated by ADRB2 via the EPAC-ERK1/2 pathway. Compared with ADRB3, ADRB2 played a predominant role under pathological hydrostatic pressure. These findings markedly uncovered the underlying mechanism of ADRBs in PBOO and provided new insights into the efficient treatment of patients with PBOO.
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Affiliation(s)
- Junyu Lai
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jianzhong Ai
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Deyi Luo
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Tao Jin
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Banghua Liao
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Liang Zhou
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Shijian Feng
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xi Jin
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Hong Li
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Kunjie Wang
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, Sichuan, China
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12
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Dunton CL, Purves JT, Hughes FM, Jin H, Nagatomi J. Elevated hydrostatic pressure stimulates ATP release which mediates activation of the NLRP3 inflammasome via P2X 4 in rat urothelial cells. Int Urol Nephrol 2018; 50:1607-1617. [PMID: 30099658 PMCID: PMC6129973 DOI: 10.1007/s11255-018-1948-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/30/2018] [Indexed: 02/06/2023]
Abstract
Partial bladder outlet obstruction (pBOO) is a prevalent urological condition commonly accompanied by increased intravesical pressure, inflammation, and fibrosis. Studies have demonstrated that pBOO results in increased NLRP3 inflammasome and caspase-1 activation and that ATP is released from urothelial cells in response to elevated pressure. In the present study, we investigated the role of elevated pressure in triggering caspase-1 activation via purinergic receptors activation in urothelial cells. Rat urothelial cell line, MYP3 cells, was subjected to hydrostatic pressures of 15 cmH2O for 60 min, or 40 cmH2O for 1 min to simulate elevated storage and voiding pressure conditions, respectively. ATP concentration in the supernatant media and intracellular caspase-1 activity in cell lysates were measured. Pressure experiments were repeated in the presence of antagonists for purinergic receptors to determine the mechanism for pressure-induced caspase-1 activation. Exposure of MYP3 cells to both pressure conditions resulted in an increase in extracellular ATP levels and intracellular caspase-1 activity. Treatment with P2X7 antagonist led to a decrease in pressure-induced ATP release by MYP3 cells, while P2X4 antagonist had no effect but both antagonists inhibited pressure-induced caspase-1 activation. Moreover, when MYP3 cells were treated with extracellular ATP (500 µM), P2X4 antagonist inhibited ATP-induced caspase-1 activation, but not P2X7 antagonist. We concluded that pressure-induced extracellular ATP in urothelial cells is amplified by P2X7 receptor activation and ATP-induced-ATP release. The amplified ATP signal then activates P2X4 receptors, which mediate activation of the caspase-1 inflammatory response.
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Affiliation(s)
- Cody L Dunton
- Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - J Todd Purves
- Department of Bioengineering, Clemson University, Clemson, SC, USA.,Division of Urology, Department of Surgery, Duke University Medical Center, Durham, NC, USA.,Department of Pediatrics, Duke University Medical Center, Durham, NC, USA
| | - Francis M Hughes
- Department of Bioengineering, Clemson University, Clemson, SC, USA.,Division of Urology, Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Huixia Jin
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Jiro Nagatomi
- Department of Bioengineering, Clemson University, Clemson, SC, USA.
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Fu Q, Li C, Yu L. Gambogic acid inhibits spinal cord injury and inflammation through suppressing the p38 and Akt signaling pathways. Mol Med Rep 2017; 17:2026-2032. [PMID: 29138827 DOI: 10.3892/mmr.2017.8026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 08/31/2017] [Indexed: 11/05/2022] Open
Abstract
Gamboge is the dry resin secreted by Garcinia hanburyi Hook.f, with the function of promoting blood circulation, detoxification, hemostasis and killing insects, used for the treatment of cancer, brain edema and other diseases. Gambogic acid is the main effective constituent of Gamboge. The present study investigated the protective effects of gambogic acid on spinal cord injury (SCI) and its anti‑inflammatory mechanism in an SCI model in vivo. Basso, Beattie and Bresnahan (BBB) testing was used to detect the protective effects of gambogic acid on nerve function of SCI rats. The water content of the spinal cord was used to analyze the protective effects of gambogic acid on the damage of SCI. Treatment with gambogic acid effectively improved BBB scores and inhibited water content of the spinal cord in SCI rats. Also, gambogic acid significantly reduced inflammatory cytokines levels of [tumor necrosis factor‑α, interleukin (IL)‑6, IL‑12 and IL‑1β] and oxidative stress (malondialdehyde, superoxide dismutase, glutathione and glutathione‑peroxidase) factors, and suppressed receptor activator of nuclear factor κB ligand, phosphorylated p38 protein expression and toll‑like receptor 4/nuclear factor‑κB pathway activation, and increased phosphatidylinositol 3‑kinase/protein kinase B (Akt) pathway activation in SCI rats. These results provide evidence that gambogic acid inhibits SCI and inflammation through suppressing the p38 and Akt signaling pathways.
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Affiliation(s)
- Qiao Fu
- Department of Rehabilitation Medicine and Physical Therapy, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Chaojian Li
- Department of Rehabilitation Medicine, Hainan General Hospital, Haikou, Hainan 570311, P.R. China
| | - Lehua Yu
- Department of Rehabilitation Medicine and Physical Therapy, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
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14
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MiR 3180-5p promotes proliferation in human bladder smooth muscle cell by targeting PODN under hydrodynamic pressure. Sci Rep 2016; 6:33042. [PMID: 27608612 PMCID: PMC5017130 DOI: 10.1038/srep33042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 08/18/2016] [Indexed: 02/05/2023] Open
Abstract
Human bladder smooth muscle cells (HBSMCs) were subjected to pressure cycles of up to 200 cm H2O to a pressure of 0 cm H2O for 24 hours. The total RNA extracted from each group was subjected to microarray analysis. miR-3180-5p emerged as the most overexpressed of all the differentially expressed microRNAs, and this finding was validated by PCR. We then used CCK-8 to quantify cell proliferation after liposome-mediated transfection. Subsequently, we investigated the change in PODN and its downstream signaling proteins, including cyclin-dependent kinase 2 (cdk2) and p21. In addition, flow cytometry was performed to quantify cell-cycle distribution. The results show that miR-3180-5p, the microRNA that was most overexpressed in response to HP, reduced the expression of PODN and podocan (p = 0.004 and p = 0.041, respectively). Silencing of PODN via miR-3180-5p overexpression revealed a significant promotion of cell proliferation increased in the CCK-8 experiment, p = 0.00077). This cell proliferation was accompanied by an increase in cdk2 expression (p = 0.00193) and a decrease in p21 expression (p = 0.0095). The percentage of cells in (S + G2/M) improved after transfection (p = 0.002). It was apparent that HP upregulates miR-3180-5p, which inhibits the expression of PODN and promotes HBSMC proliferation via the cdk2 signaling pathway.
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15
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Liang Z, Xin W, Qiang L, Xiang C, Bang-Hua L, Jin Y, De-Yi L, Hong L, Kun-Jie W. Hydrostatic pressure and muscarinic receptors are involved in the release of inflammatory cytokines in human bladder smooth muscle cells. Neurourol Urodyn 2016; 36:1261-1269. [PMID: 27576172 DOI: 10.1002/nau.23104] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 07/27/2016] [Indexed: 02/05/2023]
Affiliation(s)
- Zhou Liang
- Department of Urology, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Wei Xin
- Department of Urology, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Liu Qiang
- Department of Urology, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Cai Xiang
- Department of Urology, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Liao Bang-Hua
- Department of Urology, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Yang Jin
- Department of Urology; Affiliated Hospital/Clinical Medical College of Chengdu University; Chengdu P.R. China
| | - Luo De-Yi
- Department of Urology, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Li Hong
- Department of Urology, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Wang Kun-Jie
- Department of Urology, West China Hospital; Sichuan University; Chengdu P.R. China
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16
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Uchida N, Sivaraman S, Amoroso NJ, Wagner WR, Nishiguchi A, Matsusaki M, Akashi M, Nagatomi J. Nanometer-sized extracellular matrix coating on polymer-based scaffold for tissue engineering applications. J Biomed Mater Res A 2015; 104:94-103. [PMID: 26194176 DOI: 10.1002/jbm.a.35544] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 07/12/2015] [Accepted: 07/16/2015] [Indexed: 01/05/2023]
Abstract
Surface modification can play a crucial role in enhancing cell adhesion to synthetic polymer-based scaffolds in tissue engineering applications. Here, we report a novel approach for layer-by-layer (LbL) fabrication of nanometer-size fibronectin and gelatin (FN-G) layers on electrospun fibrous poly(carbonate urethane)urea (PCUU) scaffolds. Alternate immersions into the solutions of fibronectin and gelatin provided thickness-controlled FN-G nano-layers (PCUU(FN-G) ) which maintained the scaffold's 3D structure and width of fibrous bundle of PCUU as evidenced by scanning electron miscroscopy. The PCUU(FN-G) scaffold improved cell adhesion and proliferation of bladder smooth muscles (BSMCs) when compared to uncoated PCUU. The high affinity of PCUU(FN-G) for cells was further demonstrated by migration of adherent BSMCs from culture plates to the scaffold. Moreover, the culture of UROtsa cells, human urothelium-derived cell line, on PCUU(FN-G) resulted in an 11-15 μm thick multilayered cell structure with cell-to-cell contacts although many UROtsa cells died without forming cell connections on PCUU. Together these results indicate that this approach will aid in advancing the technology for engineering bladder tissues in vitro. Because FN-G nano-layers formation is based on nonspecific physical adsorption of fibronectin onto polymer and its subsequent interactions with gelatin, this technique may be applicable to other polymer-based scaffold systems for various tissue engineering/regenerative medicine applications.
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Affiliation(s)
- Noriyuki Uchida
- Department of Chemistry and Biotechnology, School of Engineering, the University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-8656, Japan.,RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Srikanth Sivaraman
- Department of Bioengineering, 301 Rhodes Engineering Research Center, Clemson University, Clemson, South Carolina, 29634-0905
| | - Nicholas J Amoroso
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15219
| | - William R Wagner
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15219
| | - Akihiro Nishiguchi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamada-Oka Suita, Osaka, 565-0871, Japan
| | - Michiya Matsusaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamada-Oka Suita, Osaka, 565-0871, Japan
| | - Mitsuru Akashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamada-Oka Suita, Osaka, 565-0871, Japan
| | - Jiro Nagatomi
- Department of Bioengineering, 301 Rhodes Engineering Research Center, Clemson University, Clemson, South Carolina, 29634-0905
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17
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Wei TQ, Luo DY, Chen L, Wu T, Wang KJ. Cyclic hydrodynamic pressure induced proliferation of bladder smooth muscle cells via integrin alpha5 and FAK. Physiol Res 2013; 63:127-34. [PMID: 24182341 DOI: 10.33549/physiolres.932506] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
According to previous studies, integrins play an important role in the mechanotransduction. The aim of this study was to examine the role of integrin subunits and its down-stream signaling molecules in the cyclic hydrodynamic pressure-induced proliferation of human bladder smooth muscle cells (HBSMCs) cultured in scaffolds. The HBSMCs cultured in scaffolds were subjected to four different levels of cyclic hydrodynamic pressure for 24 hours, which were controlled by a BOSE BioDynamic bioreactor. Flow cytometry was used to examine cell cycle distribution. Real-time RT-PCR and western blotting were used to examine the expression levels of integrin subunits and their downstream signaling molecules. Integrin alpha5 siRNA was applied to validate the role of integrin alpha5 in cell proliferation. Here, we showed that cyclic hydrodynamic pressure promoted proliferation of HBSMCs. The cyclic hydrodynamic pressure also increased expression of integrin alpha5 and phosphorylation of FAK, the key mediator of integrin alpha5 signaling, but not that of integrin alpha1, alpha3, alpha4, alphav, beta1 and beta3. Moreover, inhibition of integrin alpha5 decreased the level of p-FAK and abolished proliferation of HBSMCs stimulated by cyclic hydrodynamic pressure. Taken together, we demonstrate for the ?rst time that the integrin alpha5-FAK signaling pathway controls the proliferation of HBSMCs in response to cyclic hydrodynamic pressure.
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Affiliation(s)
- T-Q Wei
- Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, P.R.C.
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18
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Wazir R, Luo DY, Tian Y, Yue X, Li H, Wang KJ. The purinergic component of human bladder smooth muscle cells' proliferation and contraction under physiological stretch. Biochem Biophys Res Commun 2013; 437:256-60. [PMID: 23811273 DOI: 10.1016/j.bbrc.2013.06.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 06/17/2013] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To investigate whether cyclic stretch induces proliferation and contraction of human smooth muscle cells (HBSMCs), mediated by P2X purinoceptor 1 and 2 and the signal transduction mechanisms of this process. METHODS HBSMCs were seeded on silicone membrane and stretched under varying parameters; (equibiaxial elongation: 2.5%, 5%, 10%, 15%, 20%, 25%), (Frequency: 0.05Hz, 0.1Hz, 0.2Hz, 0.5Hz, 1Hz). 5-Bromo-2-deoxyuridine assay was employed for proliferative studies. Contractility of the cells was determined using collagen gel contraction assay. After optimal physiological stretch was established; P2X1 and P2X2 were analyzed by real time polymerase chain reaction and Western Blot. Specificity of purinoceptors was maintained by employing specific inhibitors; (NF023 for P2X1, and A317491for P2X2), in some experiments. RESULTS Optimum proliferation and contractility were observed at 5% and 10% equibiaxial stretching respectively, applied at a frequency of 0.1Hz; At 5% stretch, proliferation increased from 0.837±0.026 (control) to 1.462±0.023%, p<0.05. Mean contraction at 10% stretching increased from 31.7±2.3%, (control) to 78.28 ±1.45%, p< 0.05. Expression of P2X1 and P2X2 was upregulated after application of stretch. Inhibition had effects on proliferation (1.232±0.051, p<0.05 NF023) and (1.302±0.021, p<0.05 A314791) while contractility was markedly reduced (68.24±2.31, p<0.05 NF023) and (73.2±2.87, p<0.05 A314791). These findings shows that mechanical stretch can promote magnitude-dependent proliferative and contractile modulation of HBSMCs in vitro, and P2X1 and 2 are at least partially responsible in this process.
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Affiliation(s)
- Romel Wazir
- Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, PR China
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19
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TIAN YE, YUE XUAN, LUO DEYI, WAZIR ROMEL, WANG JIANZHONG, WU TAO, CHEN LIN, LIAO ANGHUA, WANG KUNJIE. Increased proliferation of human bladder smooth muscle cells is mediated by physiological cyclic stretch via the PI3K-SGK1-Kv1.3 pathway. Mol Med Rep 2013; 8:294-8. [DOI: 10.3892/mmr.2013.1473] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 05/07/2013] [Indexed: 11/06/2022] Open
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20
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Suson KD, Stec AA, Shimoda LA, Gearhart JP. Initial Characterization of Exstrophy Bladder Smooth Muscle Cells in Culture. J Urol 2012; 188:1521-7. [DOI: 10.1016/j.juro.2012.02.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Indexed: 10/28/2022]
Affiliation(s)
- Kristina D. Suson
- Division of Pediatric Urology, the Brady Urological Institute, The Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Andrew A. Stec
- Department of Urology, Medical University of South Carolina, Charleston, South Carolina
| | - Larissa A. Shimoda
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, The Johns Hopkins School of Medicine, Baltimore, Maryland
| | - John P. Gearhart
- Division of Pediatric Urology, the Brady Urological Institute, The Johns Hopkins School of Medicine, Baltimore, Maryland
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21
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Chen L, Wei TQ, Wang Y, Zhang J, Li H, Wang KJ. Simulated Bladder Pressure Stimulates Human Bladder Smooth Muscle Cell Proliferation via the PI3K/SGK1 Signaling Pathway. J Urol 2012; 188:661-7. [PMID: 22704443 DOI: 10.1016/j.juro.2012.03.112] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Indexed: 02/05/2023]
Affiliation(s)
- Lin Chen
- Department of Urology and Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Tang-Qiang Wei
- Department of Urology and Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Yan Wang
- Department of Urology and Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Jie Zhang
- Department of Urology and Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Hong Li
- Department of Urology and Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Kun-Jie Wang
- Department of Urology and Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu, People's Republic of China
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Maul TM, Chew DW, Nieponice A, Vorp DA. Mechanical stimuli differentially control stem cell behavior: morphology, proliferation, and differentiation. Biomech Model Mechanobiol 2011; 10:939-53. [PMID: 21253809 PMCID: PMC3208754 DOI: 10.1007/s10237-010-0285-8] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Accepted: 12/31/2010] [Indexed: 11/29/2022]
Abstract
Mesenchymal stem cell (MSC) therapy has demonstrated applications in vascular regenerative medicine. Although blood vessels exist in a mechanically dynamic environment, there has been no rigorous, systematic analysis of mechanical stimulation on stem cell differentiation. We hypothesize that mechanical stimuli, relevant to the vasculature, can differentiate MSCs toward smooth muscle (SMCs) and endothelial cells (ECs). This was tested using a unique experimental platform to differentially apply various mechanical stimuli in parallel. Three forces, cyclic stretch, cyclic pressure, and laminar shear stress, were applied independently to mimic several vascular physiologic conditions. Experiments were conducted using subconfluent MSCs for 5 days and demonstrated significant effects on morphology and proliferation depending upon the type, magnitude, frequency, and duration of applied stimulation. We have defined thresholds of cyclic stretch that potentiate SMC protein expression, but did not find EC protein expression under any condition tested. However, a second set of experiments performed at confluence and aimed to elicit the temporal gene expression response of a select magnitude of each stimulus revealed that EC gene expression can be increased with cyclic pressure and shear stress in a cell-contact-dependent manner. Further, these MSCs also appear to express genes from multiple lineages simultaneously which may warrant further investigation into post-transcriptional mechanisms for controlling protein expression. To our knowledge, this is the first systematic examination of the effects of mechanical stimulation on MSCs and has implications for the understanding of stem cell biology, as well as potential bioreactor designs for tissue engineering and cell therapy applications.
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Affiliation(s)
- Timothy M. Maul
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
- The McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive. Suite 300, Pittsburgh, PA 15219, USA
- The Center for Vascular Remodeling and Regeneration, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Douglas W. Chew
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
- The McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive. Suite 300, Pittsburgh, PA 15219, USA
- The Center for Vascular Remodeling and Regeneration, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Alejandro Nieponice
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
- The McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive. Suite 300, Pittsburgh, PA 15219, USA
- The Center for Vascular Remodeling and Regeneration, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - David A. Vorp
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
- The McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive. Suite 300, Pittsburgh, PA 15219, USA
- The Center for Vascular Remodeling and Regeneration, University of Pittsburgh, Pittsburgh, PA 15219, USA
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Crapo PM, Wang Y. Hydrostatic pressure independently increases elastin and collagen co-expression in small-diameter engineered arterial constructs. J Biomed Mater Res A 2011; 96:673-81. [PMID: 21268239 PMCID: PMC3043763 DOI: 10.1002/jbm.a.33019] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 08/30/2010] [Accepted: 12/01/2010] [Indexed: 11/06/2022]
Abstract
Prior studies have demonstrated that smooth muscle cell (SMC) proliferation, migration, and extracellular matrix production increase with hydrostatic pressure in vitro. We have engineered highly compliant small-diameter arterial constructs by culturing primary adult baboon arterial SMCs under pulsatile perfusion on tubular, porous, elastomeric scaffolds composed of poly(glycerol sebacate) (PGS). This study investigates the effect of hydrostatic pressure on the biological and mechanical properties of PGS-based engineered arterial constructs. Pressure was raised using a downstream needle valve during perfusion while preserving flow rate and pulsatility, and constructs were evaluated by pressure-diameter testing and biochemical assays for collagen and elastin. Pressurized constructs contained half as much insoluble elastin as baboon common carotid arteries but were significantly less compliant, while constructs cultured at low hydrostatic pressure contained one-third as much insoluble elastin as baboon carotids and were similar in compliance. Hydrostatic pressure significantly increased construct burst pressure, collagen and insoluble elastin content, and soluble elastin concentration in culture medium. All arteries and constructs exhibited elastic recovery during pressure cycling. Hydrostatic pressure did not appear to affect radial distribution of SMCs, collagens I and III, and elastin. These results provide insights into the control of engineered smooth muscle tissue properties using hydrostatic pressure.
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Affiliation(s)
- Peter M. Crapo
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Suite 300, Phone: 412-624-5272, Fax: 412-624-5256
| | - Yadong Wang
- Department of Bioengineering and the McGowan Institute, University of Pittsburgh, 300 Technology Drive, Pittsburgh, PA 15219, Phone: 412-624-7196, Fax: 412-383-8788
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Examining the role of mechanosensitive ion channels in pressure mechanotransduction in rat bladder urothelial cells. Ann Biomed Eng 2010; 39:688-97. [PMID: 21104316 DOI: 10.1007/s10439-010-0203-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Accepted: 11/08/2010] [Indexed: 01/15/2023]
Abstract
Until recently, the bladder urothelium had been thought of only as a physical barrier between urine and underlying bladder tissue. Recent studies, however, have demonstrated that the urothelium is sensitive to mechanical stimuli and responds by releasing signaling molecules (NO, ATP). This study sought to investigate the role of select ion channels in urothelial cell (UC) pressure mechanotransduction. Using a custom-made pressure chamber, rat bladder UCs cultured on tissue culture plastic dishes were exposed to sustained hydrostatic pressure (5-20 cmH(2)O) for up to 30 min. When compared to the control, UCs exposed to 10 cmH(2)O (5 min), and 15 cmH(2)O (5 and 15 min), exhibited a significant (p < 0.05) increase in ATP release. In the absence of extracellular calcium, ATP release due to hydrostatic pressure was attenuated. Blocking the L-type voltage-gated channel with nifedipine during pressure exposure did not affect ATP release. However, blocking TRP channels, stretch-activated channels (SACs), and the epithelial sodium channel (ENaC) with ruthenium red, gadolinium chloride, and amiloride, respectively, all abolished hydrostatic pressure-evoked ATP release. These results have provided evidence for the first time that cultured UCs are sensitive to hydrostatic pressure in the physiologically relevant range. The results of this study also provide evidence that one or multiple mechanosensitive ion channels play a role in the mechanotransduction of hydrostatic pressure, which supports the view that not only tissue stretch or tension, but also pressure is an important parameter for mechanosensing of bladder fullness.
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Effect of Sustained Hydrostatic Pressure on Rat Bladder Smooth Muscle Cell Function. Urology 2010; 75:879-85. [DOI: 10.1016/j.urology.2009.08.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Revised: 07/29/2009] [Accepted: 08/20/2009] [Indexed: 01/24/2023]
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Increased synthetic phenotype behavior of smooth muscle cells in response to in vitro balloon angioplasty injury model. Ann Vasc Surg 2009; 24:116-26. [PMID: 19781909 DOI: 10.1016/j.avsg.2009.07.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2008] [Revised: 06/17/2009] [Accepted: 07/12/2009] [Indexed: 11/20/2022]
Abstract
Restenosis remains a common problem following balloon angioplasty, and it has been speculated that changes in the mechanical environment due to endovascular interventions are correlated with shifts in smooth muscle cell (SMC) phenotype. In order to study SMC response to forces similar to those exerted during balloon angioplasty, an in vitro concurrent shear and tensile forces simulator has been developed. After 24 hr of exposure to cyclic tension (5%) and shear (0.1-0.5 dynes/cm(2)) following simulated angioplasty injury (12% stretch), rat aortic SMCs exhibited significant synthetic behavior. These responses included increased cell proliferation, apoptosis, and cell hypertrophy compared to cells exposed to strain alone. While all SMCs exposed to dynamic stimuli (strain, strain+balloon injury, strain+balloon injury+shear) demonstrated a decrease in contractile protein expression, the injury group also exhibited significantly greater expression of the synthetic marker vimentin. These in vitro findings agree with in vivo events following balloon angioplasty and present a refined dynamic model to be implemented for better understanding of SMC activation and prevention of responses through pharmacological treatment.
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Russ AL, Dadarlat IA, Haberstroh KM, Rundell AE. Investigating the role of ischemia vs. elevated hydrostatic pressure associated with acute obstructive uropathy. Ann Biomed Eng 2009; 37:1415-24. [PMID: 19381812 DOI: 10.1007/s10439-009-9695-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Accepted: 04/07/2009] [Indexed: 11/29/2022]
Abstract
Obstructive uropathy can cause irreversible renal damage. It has been hypothesized that elevated hydrostatic pressure within renal tubules and/or renal ischemia contributes to cellular injury following obstruction. However, these assaults are essentially impossible to isolate in vivo. Therefore, we developed a novel pressure system to evaluate the isolated and coordinated effects of elevated hydrostatic pressure and ischemic insults on renal cells in vitro. Cells were subjected to: (1) elevated hydrostatic pressure (80 cm H(2)O); (2) ischemic insults (hypoxia (0% O(2)), hypercapnia (20% CO(2)), and 0 mM glucose media); and (3) elevated pressure + ischemic insults. Cellular responses including cell density, lactate dehydrogenase (LDH) release, and intracellular LDH (LDH(i)), were recorded after 24 h of insult and following recovery. Data were analyzed to assess the primary effects of ischemic insults and elevated pressure. Unlike pressure, ischemic insults exerted a primary effect on nearly all response measurements. We also evaluated the data for insult interactions and identified significant interactions between ischemic insults and pressure. Altogether, findings indicate that pressure may sub-lethally effect cells and alter cellular metabolism (LDH(i)) and membrane properties. Results suggest that renal ischemia may be the primary, but not the sole, cause of cellular injury induced by obstructive uropathy.
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Affiliation(s)
- Alissa L Russ
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN 47907-1791, USA.
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Nagatomi J, Wu Y, Gray M. Proteomic Analysis of Bladder Smooth Muscle Cell Response to Cyclic Hydrostatic Pressure. Cell Mol Bioeng 2009. [DOI: 10.1007/s12195-009-0043-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Elder BD, Athanasiou KA. Synergistic and additive effects of hydrostatic pressure and growth factors on tissue formation. PLoS One 2008; 3:e2341. [PMID: 18523560 PMCID: PMC2394656 DOI: 10.1371/journal.pone.0002341] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2008] [Accepted: 04/28/2008] [Indexed: 11/18/2022] Open
Abstract
Background Hydrostatic pressure (HP) is a significant factor in the function of many tissues, including cartilage, knee meniscus, temporomandibular joint disc, intervertebral disc, bone, bladder, and vasculature. Though studies have been performed in assessing the role of HP in tissue biochemistry, to the best of our knowledge, no studies have demonstrated enhanced mechanical properties from HP application in any tissue. Methodology/Principal Findings The objective of this study was to determine the effects of hydrostatic pressure (HP), with and without growth factors, on the biomechanical and biochemical properties of engineered articular cartilage constructs, using a two-phased approach. In phase I, a 3×3 full-factorial design of HP magnitude (1, 5, 10 MPa) and frequency (0, 0.1, 1 Hz) was used, and the best two treatments were selected for use in phase II. Static HP at 5 MPa and 10 MPa resulted in significant 95% and 96% increases, respectively, in aggregate modulus (HA), with corresponding increases in GAG content. These regimens also resulted in significant 101% and 92% increases in Young's modulus (EY), with corresponding increases in collagen content. Phase II employed a 3×3 full-factorial design of HP (no HP, 5 MPa static, 10 MPa static) and growth factor application (no GF, BMP-2+IGF-I, TGF-β1). The combination of 10 MPa static HP and TGF-β1 treatment had an additive effect on both HA and EY, as well as a synergistic effect on collagen content. This group demonstrated a 164% increase in HA, a 231% increase in EY, an 85% increase in GAG/wet weight (WW), and a 173% increase in collagen/WW, relative to control. Conclusions/Significance To our knowledge, this is the first study to demonstrate increases in the biomechanical properties of tissue from pure HP application, using a cartilage model. Furthermore, it is the only study to demonstrate additive or synergistic effects between HP and growth factors on tissue functional properties. These findings are exciting as coupling HP stimulation with growth factor application has allowed for the formation of tissue engineered constructs with biomechanical and biochemical properties spanning native tissue values.
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Affiliation(s)
- Benjamin D. Elder
- Department of Bioengineering, Rice University, Houston, Texas, United States of America
| | - Kyriacos A. Athanasiou
- Department of Bioengineering, Rice University, Houston, Texas, United States of America
- * E-mail:
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Xu J, Ismat FA, Wang T, Yang J, Epstein JA. NF1 regulates a Ras-dependent vascular smooth muscle proliferative injury response. Circulation 2007; 116:2148-56. [PMID: 17967772 DOI: 10.1161/circulationaha.107.707752] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Neurofibromatosis type I (NF1) is a common autosomal dominant disorder with a broad array of clinical manifestations, including benign and malignant tumors, osseous dysplasias, and characteristic cutaneous findings. In addition, NF1 patients have an increased incidence of cardiovascular diseases, including obstructive vascular disorders. In animal models, endothelial expression of the disease gene, NF1, is critical for normal heart development. However, the pathogeneses of the more common vascular disorders are not well characterized. METHODS AND RESULTS To examine the role of NF1 in vascular smooth muscle, we generated mice with homozygous loss of the murine homolog Nf1 in smooth muscle (Nf1smKO). These mice develop and breed normally. However, in response to vascular injury, they display a marked intimal hyperproliferation and abnormal activation of mitogen-activated protein kinase, a downstream effector of Ras. Vascular smooth muscle cells cultured from these mice also display enhanced proliferation and mitogen-activated protein kinase activity. Smooth muscle expression of the NF1 Ras-regulatory domain (GTPase activating protein-related domain) rescues intimal hyperplasia in Nf1smKO mice and normalizes vascular smooth muscle cell Ras effector activity and proliferation in vitro, similar to blockade of downstream effectors of Ras. CONCLUSIONS In this in vivo model of NF1 obstructive vascular disease, we have shown that Nf1 regulation of Ras plays a critical role in vascular smooth muscle proliferation after injury. These results suggest opportunities for targeted therapeutics in the prevention and treatment of NF1-related vascular disease and in the treatment of neointimal proliferation in other settings.
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Affiliation(s)
- Junwang Xu
- Department of Cell and Developmental Biology and Penn Cardiovascular Institute, University of Pennsylvania, Philadelphia, PA, USA
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