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Tang Y, Zhou Y, Zhang M. A Chitosan Scaffold Supports the Enhanced and Prolonged Differentiation of HiPSCs into Nucleus Pulposus-like Cells. ACS APPLIED MATERIALS & INTERFACES 2024; 16:28263-28275. [PMID: 38788694 DOI: 10.1021/acsami.4c06013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
Intervertebral disc degeneration (IDD) is a progressive condition and stands as one of the primary causes of low back pain. Cell therapy that uses nucleus pulposus (NP)-like cells derived from human induced pluripotent stem cells (hiPSCs) holds great promise as a treatment for IDD. However, the conventional two-dimensional (2D) monolayer cultures oversimplify cell-cell interactions, leading to suboptimal differentiation efficiency and potential loss of phenotype. While three-dimensional (3D) culture systems like Matrigel improve hiPSC differentiation efficiency, they are limited by animal-derived materials for translation, poorly defined composition, short-term degradation, and high cost. In this study, we introduce a new 3D scaffold fabricated using medical-grade chitosan with a high degree of deacetylation. The scaffold features a highly interconnected porous structure, near-neutral surface charge, and exceptional degradation stability, benefiting iPSC adhesion and proliferation. This scaffold remarkably enhances the differentiation efficiency and allows uninterrupted differentiation for up to 25 days without subculturing. Notably, cells differentiated on the chitosan scaffold exhibited increased cell survival rates and upregulated gene expression associated with extracellular matrix secretion under a chemically defined condition mimicking the challenging microenvironment of intervertebral discs. These characteristics qualify the chitosan scaffold-cell construct for direct implantation, serving as both a structural support and a cellular source for enhanced stem cell therapy for IDD.
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Affiliation(s)
- Yuanzhang Tang
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Yang Zhou
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Miqin Zhang
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
- Department of Neurological Surgery, University of Washington, Seattle, Washington 98195, United States
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Gansau J, McDonnell EE, Buckley CT. Development and characterization of antacid microcapsules to buffer the acidic intervertebral disc microenvironment. J Biomed Mater Res A 2024. [PMID: 38817021 DOI: 10.1002/jbm.a.37755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 04/12/2024] [Accepted: 05/14/2024] [Indexed: 06/01/2024]
Abstract
During intervertebral disc (IVD) degeneration, microenvironmental challenges such as decreasing levels of glucose, oxygen, and pH play crucial roles in cell survival and matrix turnover. Antacids, such as Mg(OH)2 and CaCO3, entrapped in microcapsules are capable of neutralizing acidic microenvironments in a controlled fashion and therefore may offer the potential to improve the acidic niche of the degenerated IVD and enhance cell-based regeneration strategies. The objectives of this work were, first, to develop and characterize antacid microcapsules and assess their neutralization capacity in an acidic microenvironment and, second, to combine antacid microcapsules with cellular microcapsules in a hybrid gel system to investigate their neutralization effect as a potential therapeutic in a disc explant model. To achieve this, we screened five different pH- neutralizing agents (Al(OH)3, Mg(OH)2, CaCO3, and HEPES) in terms of their pH neutralization capacities, with Mg(OH)2 or CaCO3 being carried forward for further investigation. Antacid-alginate microcapsules were formed at different concentrations using the electrohydrodynamic spraying process and assessed in terms of size, buffering kinetics, cell compatibility, and cytotoxicity. Finally, the combination of cellular microcapsules and antacid capsules was examined in a bovine disc explant model under physiological degenerative conditions. Overall, CaCO3 was found to be superior in terms of neutralization capacities, release kinetics, and cellular response. Specifically, CaCO3 elevated the acidic pH to neutral levels and is estimated to be maintained for several weeks based on Ca2+ release. Using a disc explant model, it was demonstrated that CaCO3 microcapsules were capable of increasing the local pH within the core of a hybrid cellular gel system. This work highlights the potential of antacid microcapsules to positively alter the challenging acidic microenvironment conditions typically observed in degenerative disc disease, which may be used in conjunction with cell therapies to augment regeneration.
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Affiliation(s)
- Jennifer Gansau
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
- Discipline of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, The University of Dublin, Dublin, Ireland
- Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Emily E McDonnell
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
- Discipline of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Conor T Buckley
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
- Discipline of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, The University of Dublin, Dublin, Ireland
- Advanced Materials and Bioengineering Research (AMBER) Centre, Royal College of Surgeons in Ireland & Trinity College Dublin, The University of Dublin, Dublin, Ireland
- Tissue Engineering Research Group, Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
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Huang ZN, Wang ZY, Cheng XF, Huang ZZ, Han YL, Cui YZ, Liu B, Tian W. Melatonin alleviates oxidative stress-induced injury to nucleus pulposus-derived mesenchymal stem cells through activating PI3K/Akt pathway. J Orthop Translat 2023; 43:66-84. [PMID: 38089645 PMCID: PMC10711395 DOI: 10.1016/j.jot.2023.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/23/2023] [Accepted: 10/10/2023] [Indexed: 03/22/2024] Open
Abstract
BACKGROUND The changes in the microenvironment of degenerative intervertebral discs cause oxidative stress injury and excessive apoptosis of intervertebral disc endogenous stem cells. The purpose of this study was to explore the possible mechanism of the protective effect of melatonin on oxidative stress injury in NPMSCs induced by H2O2. METHODS The Cell Counting Kit-8 assay was used to evaluate the cytotoxicity of hydrogen peroxide and the protective effects of melatonin. ROS content was detected by 2'7'-dichlorofluorescin diacetate (DCFH-DA). Mitochondrial membrane potential (MMP) was detected by the JC-1assay. Transferase mediated d-UTP Nick end labeling (TUNEL) and Annexin V/PI double staining were used to determine the apoptosis rate. Additionally, apoptosis-associated proteins and PI3K/Akt signaling pathway-related proteins were evaluated by immunofluorescence, immunoblotting and PCR. ECMs were evaluated by RT‒PCR and immunofluorescence. In vivo, X-ray, Magnetic resonance imaging (MRI) and Histological analyses were used to evaluate the protective effect of melatonin. RESULTS Melatonin had an obvious protective effect on NPMSCs treated with 0-10 μM melatonin for 24 h. In addition, melatonin also had obvious protective effects on mitochondrial dysfunction, decreased membrane potential and cell senescence induced by H2O2. More importantly, melatonin could significantly reduce the apoptosis of nucleus pulposus mesenchymal stem cells induced by H2O2 by regulating the expression of apoptosis-related proteins and decreasing the rate of apoptosis. After treatment with melatonin, the PI3K/Akt pathway was significantly activated in nucleus pulposus mesenchymal stem cells, while the protective effect was significantly weakened after PI3K-IN-1 treatment. In vivo, the results of X-ray, MRI and histological analyses showed that therapy with melatonin could partially reduce the degree of intervertebral disc degeneration. CONCLUSION Our research demonstrated that melatonin can effectively alleviate the excessive apoptosis and mitochondrial dysfunction of nucleus pulposus mesenchymal stem cells induced by oxidative stress via the PI3K/Akt pathway, which provides a novel idea for the therapy of intervertebral disc degeneration. THE TRANSLATIONAL POTENTIAL OF THIS ARTICLE This study indicates that melatonin can effectively alleviate the excessive apoptosis and mitochondrial dysfunction of NPMSCs through activating the PI3K/Akt pathway. Melatonin might serve as a promising candidate for the prevention and treatment of Intervertebral disc degeneration disease (IVDD) in the future.
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Affiliation(s)
- Ze-Nan Huang
- Department of Orthopedics, Shandong First Medical University & Shandong Academy of Medical Science, Shandong, 200072, China
- Department of Spine Surgery, Beijing Jishuitan Hospital, The Fourth Clinical Hospital Affiliated to Peking University, No. 37 Xinjiekou East, Road, Beijing, 100035, China
| | - Ze-Yu Wang
- Department of Orthopedics, The Affiliated BenQ Hospital of Nanjing Medical University, 210019, Nanjing, Jiangsu Province, China
| | - Xiao-Fei Cheng
- Department of Orthopedic Surgery, Shanghai Key Laboratory of Orthopedics Implants, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Zhao-Zhang Huang
- Taixing Medical Center, Taixing People's Hospital, Taixing, 225400, Jiangsu Province, China
| | - Yan-Ling Han
- Medical Experimental Research Center, Yangzhou University, Yangzhou, 225001, China
| | - Ya-Zhou Cui
- Department of Orthopedics, Shandong First Medical University & Shandong Academy of Medical Science, Shandong, 200072, China
| | - Bo Liu
- Department of Spine Surgery, Beijing Jishuitan Hospital, The Fourth Clinical Hospital Affiliated to Peking University, No. 37 Xinjiekou East, Road, Beijing, 100035, China
| | - Wei Tian
- Department of Spine Surgery, Beijing Jishuitan Hospital, The Fourth Clinical Hospital Affiliated to Peking University, No. 37 Xinjiekou East, Road, Beijing, 100035, China
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Levis H, Weston J, Austin B, Larsen B, Ginley-Hidinger M, Gullbrand SE, Lawrence B, Bowles RD. Multiplex gene editing to promote cell survival using low-pH clustered regularly interspaced short palindromic repeats activation (CRISPRa) gene perturbation. Cytotherapy 2023; 25:1069-1079. [PMID: 37245150 PMCID: PMC10527564 DOI: 10.1016/j.jcyt.2023.05.001] [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: 01/27/2023] [Revised: 05/02/2023] [Accepted: 05/04/2023] [Indexed: 05/29/2023]
Abstract
BACKGROUND AIMS Lower back pain is the leading cause of disability worldwide and is often linked to degenerative disc disease (DDD), the breakdown of intervertebral discs. The majority of treatment options for DDD are palliative, with clinicians prescribing medication or physical therapy to return the patient to work. Cell therapies are promising treatment options with the potential to restore functional physiological tissue and treat the underlying causes of DDD. DDD is characterized by biochemical changes in the microenvironment of the disc, including changes in nutrient levels, hypoxia, and changes in pH. Stem cell therapies are promising therapies to treat DDD, but the acidic environment in a degenerating disc significantly hinders the viability of stem cells, affecting their efficacy. Clustered regularly interspaced short palindromic repeats (CRISPR) systems allow us to engineer cell phenotypes in a well-regulated and controlled manner. Recently, CRISPR gene perturbation screens have assessed fitness, growth and provided a means for specific cell phenotype characterization. METHODS In this study, we use a CRISPR-activation (a) gene perturbation screen to identify gene upregulation targets that enhance adipose-derived stem cell survival in acidic culture conditions. RESULTS We identified 1213 prospective pro-survival genes and systematically narrowed these down to 20 genes for validation. We further narrowed down our selection to the top five prospective genes using Cell Counting Kit-8 cell viability assays in naïve adipose-derived stem cells and ACAN/Col2 CRISPRa upregulated stem cells. Finally, we examined the extracellular matrix-producing abilities of multiplex ACAN/Col2-pro-survival edited cells in pellet culture. CONCLUSIONS Using the results from the CRISPRa screen, we are able to engineer desirable cell phenotypes to improve cell viability for the potential treatment of DDD and other disease states that expose cell therapies to acidic environments, while also providing broader knowledge on genes regulating low-pH cell survival.
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Affiliation(s)
- Hunter Levis
- Department of Biomedical Engineering, The University of Utah, Salt Lake City, Utah, USA
| | - Jacob Weston
- Department of Biomedical Engineering, The University of Utah, Salt Lake City, Utah, USA
| | - Brooke Austin
- Department of Biomedical Engineering, The University of Utah, Salt Lake City, Utah, USA
| | - Bryce Larsen
- Department of Biomedical Engineering, The University of Utah, Salt Lake City, Utah, USA
| | | | - Sarah E Gullbrand
- Department of Orthopedic Surgery, The University of Pennsylvania, Philadelphia, Pennsylvania, USA; Corporal Michael J. Crescenz VA Medical Center, Philadelphia, Pennsylvania, USA
| | - Brandon Lawrence
- Department of Orthopedic Surgery, The University of Utah, Salt Lake City, Utah, USA
| | - Robby D Bowles
- Department of Biomedical Engineering, The University of Utah, Salt Lake City, Utah, USA; Department of Orthopedic Surgery, The University of Utah, Salt Lake City, Utah, USA.
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Zhou Q, Zhu C, Xuan A, Zhang J, Zhu Z, Tang L, Ruan D. Fisetin regulates the biological effects of rat nucleus pulposus mesenchymal stem cells under oxidative stress by sirtuin-1 pathway. Immun Inflamm Dis 2023; 11:e865. [PMID: 37249300 DOI: 10.1002/iid3.865] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 04/17/2023] [Accepted: 04/23/2023] [Indexed: 05/31/2023] Open
Abstract
BACKGROUND Excessive oxidative stress has been accepted as one of the critical factors for intervertebral disc degeneration (IDD), which is associated with low back pain (LBP). Fisetin (Fis) is a bioactive flavonoid that possesses strong bioactive activity. In present study, we aimed to illuminate the role of Fis on nucleus pulposus mesenchymal stem cells (NPMSCs). METHODS NPMSCs were isolated and cultured from rat NP tissues and identified by flow cytometry and multilinear differentiation. The cytotoxicity of Fis, EX-527, and hydrogen peroxide (H2 O2 ) on NPMSCs was validated using Cell Counting Kit-8 tests. Cell apoptosis was tested by flow cytometry and TUNEL assay. Inflammatory mediators were assessed by Elisa tests, RT-PCR. Extracellular matrix (ECM) metabolism was measured by Western blot analysis and RT-qPCR. The expression of the SIRT1 was evaluated by Western blot analysis. RESULTS NPMSCs were successfully isolated and cultured from rat NP tissues, and it has been identified by flow cytometry and multilinear differentiation. The results showed that Fis attenuated H2 O2 -induced apoptosis, inflammation, and ECM degradation of NPMSCs. Moreover, the above protective effects of Fis can be inhibited by EX-527, a unique SIRT1 inhibitor, indicating that SIRT1 may involve in the mechanism of Fis in protecting NPMSCs from oxidative stress. CONCLUSIONS As a natural compound with little cytotoxicity on NPMSCs, Fis alleviate H2 O2 -induced apoptosis, inflammation, and ECM degradation by suppressing oxidative stress, this finding may add the theoretical basis for research on new treatment of IDD based on NPMSCs.
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Affiliation(s)
- Qing Zhou
- Navy Clinical College, Anhui Medical University, Hefei, Anhui, China
- The Fifth School of Clinical Medicine, Anhui Medical University, Hefei, Anhui, China
- Department of Orthopedic Surgery, The Sixth Medical Center of PLA General Hospital, Beijing, China
| | - Chao Zhu
- Department of Orthopedic Surgery, The Sixth Medical Center of PLA General Hospital, Beijing, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Anwu Xuan
- Department of Orthopedic Surgery, The Sixth Medical Center of PLA General Hospital, Beijing, China
| | - Junyou Zhang
- Department of Orthopedic Surgery, The Sixth Medical Center of PLA General Hospital, Beijing, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Zhenbiao Zhu
- Department of Orthopedic Surgery, The Sixth Medical Center of PLA General Hospital, Beijing, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Liang Tang
- Department of Orthopedic Surgery, The Sixth Medical Center of PLA General Hospital, Beijing, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Dike Ruan
- Navy Clinical College, Anhui Medical University, Hefei, Anhui, China
- The Fifth School of Clinical Medicine, Anhui Medical University, Hefei, Anhui, China
- Department of Orthopedic Surgery, The Sixth Medical Center of PLA General Hospital, Beijing, China
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The Influence of Intervertebral Disc Microenvironment on the Biological Behavior of Engrafted Mesenchymal Stem Cells. Stem Cells Int 2022; 2022:8671482. [DOI: 10.1155/2022/8671482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/19/2022] [Accepted: 10/25/2022] [Indexed: 11/09/2022] Open
Abstract
Intervertebral disc degeneration is the main cause of low back pain. Traditional treatment methods cannot repair degenerated intervertebral disc tissue. The emergence of stem cell therapy makes it possible to regenerate and repair degenerated intervertebral disc tissue. At present, mesenchymal stem cells are the most studied, and different types of mesenchymal stem cells have their own characteristics. However, due to the harsh and complex internal microenvironment of the intervertebral disc, it will affect the biological behaviors of the implanted mesenchymal stem cells, such as viability, proliferation, migration, and chondrogenic differentiation, thereby affecting the therapeutic effect. This review is aimed at summarizing the influence of each intervertebral disc microenvironmental factor on the biological behavior of mesenchymal stem cells, so as to provide new ideas for using tissue engineering technology to assist stem cells to overcome the influence of the microenvironment in the future.
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Lufkin L, Samanta A, Baker D, Lufkin S, Schulze J, Ellis B, Rose J, Lufkin T, Kraus P. Glis1 and oxaloacetate in nucleus pulposus stromal cell somatic reprogramming and survival. Front Mol Biosci 2022; 9:1009402. [PMID: 36406265 PMCID: PMC9671658 DOI: 10.3389/fmolb.2022.1009402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 10/10/2022] [Indexed: 12/04/2022] Open
Abstract
Regenerative medicine aims to repair degenerate tissue through cell refurbishment with minimally invasive procedures. Adipose tissue (FAT)-derived stem or stromal cells are a convenient autologous choice for many regenerative cell therapy approaches. The intervertebral disc (IVD) is a suitable target. Comprised of an inner nucleus pulposus (NP) and an outer annulus fibrosus (AF), the degeneration of the IVD through trauma or aging presents a substantial socio-economic burden worldwide. The avascular nature of the mature NP forces cells to reside in a unique environment with increased lactate levels, conditions that pose a challenge to cell-based therapies. We assessed adipose and IVD tissue-derived stromal cells through in vitro transcriptome analysis in 2D and 3D culture and suggested that the transcription factor Glis1 and metabolite oxaloacetic acid (OAA) could provide NP cells with survival tools for the harsh niche conditions in the IVD.
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Affiliation(s)
- Leon Lufkin
- Department of Statistics and Data Science, Yale University, New Haven, CT, United States,The Clarkson School, Clarkson University, Potsdam, NY, United States
| | - Ankita Samanta
- Department of Biology, Clarkson University, Potsdam, NY, United States
| | - DeVaun Baker
- The Clarkson School, Clarkson University, Potsdam, NY, United States,Department of Biology, Clarkson University, Potsdam, NY, United States
| | - Sina Lufkin
- The Clarkson School, Clarkson University, Potsdam, NY, United States,Department of Biology, Clarkson University, Potsdam, NY, United States
| | | | - Benjamin Ellis
- Department of Biology, Clarkson University, Potsdam, NY, United States
| | - Jillian Rose
- Department of Biology, Clarkson University, Potsdam, NY, United States
| | - Thomas Lufkin
- Department of Biology, Clarkson University, Potsdam, NY, United States
| | - Petra Kraus
- Department of Biology, Clarkson University, Potsdam, NY, United States,*Correspondence: Petra Kraus,
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Wu R, Li H, Sun C, Liu J, Chen D, Yu H, Huang Z, Lin S, Chen Y, Zheng Q. Exosome-based strategy for degenerative disease in orthopedics: Recent progress and perspectives. J Orthop Translat 2022; 36:8-17. [PMID: 35891923 PMCID: PMC9283806 DOI: 10.1016/j.jot.2022.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/07/2022] [Accepted: 05/19/2022] [Indexed: 02/09/2023] Open
Abstract
BACKGROUND Degenerative diseases in orthopaedics have become a significant global public health issue with the aging of the population worldwide. The traditional medical interventions, including physical therapy, pharmacological therapy and even surgery, hardly work to modify degenerative progression. Stem cell-based therapy is widely accepted to treat degenerative orthopaedic disease effectively but possesses several limitations, such as the need for strict monitoring of production and storage and the potential risks of tumorigenicity and immune rejection in clinical translation. Furthermore, the ethical issues surrounding the acquisition of embryonic stem cells are also broadly concerned. Exosome-based therapy has rapidly grown in popularity in recent years and is regarded as an ideal alternative to stem cell-based therapy, offering a promise to achieve 'cell-free' tissue regeneration. METHODS Traditionally, the native exosomes extracted from stem cells are directly injected into the injured site to promote tissue regeneration. Recently, several modified exosome-based strategies were developed to overcome the limitations of native exosomes, which include mainly exogenous molecule loading and exosome delivery through scaffolds. In this paper, a systematic review of the exosome-based strategy for degenerative disease in orthopaedics is presented. RESULTS Treatment strategies based on the native exosomes are effective but with several disadvantages such as rapid diffusion and insufficient and fluctuating functional contents. The modified exosome-based strategies can better match the requirements of the regeneration in some complex healing processes. CONCLUSION Exosome-based strategies hold promise to manage degenerative disease in orthopaedics prior to patients reaching the advanced stage of disease in the future. The timely summary and highlights offered herein could provide a research perspective to promote the development of exosome-based therapy, facilitating the clinical translation of exosomes in orthopaedics. TRANSLATIONAL POTENTIAL OF THIS ARTICLE Exosome-based therapy is superior in anti-senescence and anti-inflammatory effects and possesses lower risks of tumorigenicity and immune rejection relative to stem cell-based therapy. Exosome-based therapy is regarded as an ideal alternative to stem cell-based therapy, offering a promise to achieve 'cell-free' tissue regeneration.
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Affiliation(s)
- Rongjie Wu
- Department of Orthopedics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China
- Shantou University Medical College, Shantou, China
| | - Haotao Li
- Department of Orthopedics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China
- Shantou University Medical College, Shantou, China
| | - Chuanwei Sun
- Department of Burn and Wound Repair Surgery and Research Department of Medical Science, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China
| | - Jialin Liu
- Rehabilitation Center, Shengjing Hospital Affiliated to China Medical University, Shenyang, Liaoning, PR China
| | - Duanyong Chen
- Department of Orthopedics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China
| | - Haiyang Yu
- Department of Orthopedics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China
| | - Zena Huang
- Department of General Medicine, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Sien Lin
- Department of Orthopaedics & Traumatology, Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong Special Administrative Region of China
- Corresponding author.
| | - Yuanfeng Chen
- Department of Orthopedics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China
- Research Department of Medical Science, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China
- Corresponding author.Department of Orthopedics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China.
| | - Qiujian Zheng
- Department of Orthopedics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China
- Southern Medical University, Guangzhou, PR China
- Corresponding author. Department of Orthopedics, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, PR China.
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Chu G, Zhang W, Han F, Li K, Liu C, Wei Q, Wang H, Liu Y, Han F, Li B. The role of microenvironment in stem cell-based regeneration of intervertebral disc. Front Bioeng Biotechnol 2022; 10:968862. [PMID: 36017350 PMCID: PMC9395990 DOI: 10.3389/fbioe.2022.968862] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 07/18/2022] [Indexed: 01/07/2023] Open
Abstract
Regenerative medicine for intervertebral disc (IVD) disease, by utilizing chondrocytes, IVD cells, and stem cells, has progressed to clinical trials in the treatment of back pain, and has been studied in various animal models of disc degeneration in the past decade. Stem cells exist in their natural microenvironment, which provides vital dynamic physical and chemical signals for their survival, proliferation and function. Long-term survival, function and fate of mesenchymal stem cells (MSCs) depend on the microenvironment in which they are transplanted. However, the transplanted MSCs and the endogenous disc cells were influenced by the complicated microenvironment in the degenerating disc with the changes of biochemical and biophysical components. It is important to understand how the MSCs and endogenous disc cells survive and thrive in the harsh microenvironment of the degenerative disc. Furthermore, materials containing stem cells and their natural microenvironment have good clinical effects. However, the implantation of tissue engineering IVD (TE-IVD) cannot provide a complete and dynamic microenvironment for MSCs. IVD graft substitutes may need further improvement to provide the best engineered MSC microenvironment. Additionally, the IVD progenitor cells inside the stem cell niches have been regarded as popular graft cells for IVD regeneration. However, it is still unclear whether actual IVD progenitor cells exist in degenerative spinal conditions. Therefore, the purpose of this review is fourfold: to discuss the presence of endogenous stem cells; to review and summarize the effects of the microenvironment in biological characteristics of MSC, especially those from IVD; to explore the feasibility and prospects of IVD graft substitutes and to elaborate state of the art in the use of MSC transplantation for IVD degeneration in vivo as well as their clinical application.
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Affiliation(s)
- Genglei Chu
- Orthopaedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Soochow University, Suzhou, China
| | - Weidong Zhang
- Department of Orthopaedic Surgery, Affiliated Hospital of Nantong University, Nantong, China
| | - Feng Han
- Orthopaedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Soochow University, Suzhou, China
| | - Kexin Li
- Orthopaedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Soochow University, Suzhou, China
| | - Chengyuan Liu
- Orthopaedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Soochow University, Suzhou, China
| | - Qiang Wei
- Orthopaedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Soochow University, Suzhou, China
| | - Huan Wang
- Orthopaedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Soochow University, Suzhou, China
| | - Yijie Liu
- Orthopaedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Soochow University, Suzhou, China
- *Correspondence: Yijie Liu, ; Fengxuan Han, ; Bin Li,
| | - Fengxuan Han
- Orthopaedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Soochow University, Suzhou, China
- *Correspondence: Yijie Liu, ; Fengxuan Han, ; Bin Li,
| | - Bin Li
- Orthopaedic Institute, Department of Orthopaedic Surgery, The First Affiliated Hospital, Suzhou Medical College, Soochow University, Suzhou, China
- Collaborative Innovation Center of Hematology, Suzhou Medical College, Soochow University, Suzhou, China
- *Correspondence: Yijie Liu, ; Fengxuan Han, ; Bin Li,
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Zhang YY, Hu ZL, Qi YH, Li HY, Chang X, Gao XX, Liu CH, Li YY, Lou JH, Zhai Y, Li CQ. Pretreatment of nucleus pulposus mesenchymal stem cells with appropriate concentration of H 2O 2 enhances their ability to treat intervertebral disc degeneration. Stem Cell Res Ther 2022; 13:340. [PMID: 35883157 PMCID: PMC9327256 DOI: 10.1186/s13287-022-03031-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 07/04/2022] [Indexed: 11/18/2022] Open
Abstract
Background Nucleus pulposus mesenchymal stem cells (NPMSCs) transplantation is a promising treatment for intervertebral disc degeneration (IVDD). However, the transplanted NPMSCs exhibited weak cell proliferation, high cell apoptosis, and a low ability to resist the harsh microenvironment of the degenerated intervertebral disc. There is an urgent need to explore feasible methods to enhance the therapeutic efficacy of NPMSCs transplantation. Objective To identify the optimal concentration for NPMSCs pretreatment with hydrogen peroxide (H2O2) and explore the therapeutic efficacy of NPMSCs transplantation using H2O2 pretreatment in IVDD. Methods Rat NPMSCs were pretreated with different concentrations (range from 25 to 300 μM) of H2O2. The proliferation, reactive oxygen species (ROS) level, and apoptosis of NPMSCs were detected by cell counting kit-8 (CCK-8) assay, 5-ethynyl-2′-deoxyuridine (EdU) staining, and flow cytometry in vitro. The underlying signalling pathways were explored utilizing Western blotting. A rat needle puncture-stimulated IVDD model was established. X-ray, histological staining, and a multimode small animal live imaging system were used to evaluate the therapeutic effect of H2O2-pretreated NPMSCs in vivo. Results NPMSCs pretreated with 75 μM H2O2 demonstrated the strongest elevated cell proliferation by inhibiting the Hippo pathway (P < 0.01). Meanwhile, 75 μM H2O2-pretreated NPMSCs exhibited significantly enhanced antioxidative stress ability (P < 0.01), which is related to downregulated Brd4 and Keap1 and upregulated Nrf2. NPMSCs pretreated with 75 μM H2O2 also exhibited distinctly decreased apoptosis (P < 0.01). In vivo experiments verified that 75 μM H2O2-pretreated NPMSCs-transplanted rats exhibited an enhanced disc height index (DHI% = 90.00 ± 4.55, P < 0.01) and better histological morphology (histological score = 13.5 ± 0.5, P < 0.01), which means 75 μM H2O2-pretreated NPMSCs can better adapt to the environment of degenerative intervertebral discs and promote the repair of IVDD. Conclusions Pretreatment with 75 μM H2O2 was the optimal concentration to improve the proliferation, antioxidative stress, and antiapoptotic ability of transplanted NPMSCs, which is expected to provide a new feasible method to improve the stem cell therapy efficacy of IVDD. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-03031-7.
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Affiliation(s)
- Yu-Yao Zhang
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China
| | - Zhi-Lei Hu
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China
| | - Yu-Han Qi
- Institute of Basic Theory of Traditional Chinese Medicine, China Academy of Chinese Medical Science, Beijing, 100000, China
| | - Hai-Yin Li
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China
| | - Xian Chang
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China
| | - Xiao-Xin Gao
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China
| | - Chen-Hao Liu
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China
| | - Yue-Yang Li
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China
| | - Jin-Hui Lou
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China
| | - Yu Zhai
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China.
| | - Chang-Qing Li
- Department of Orthopedics, Xinqiao Hospital, Army Military Medical University, Chongqing, 400037, China.
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Impact of Microenvironmental Changes during Degeneration on Intervertebral Disc Progenitor Cells: A Comparison with Mesenchymal Stem Cells. Bioengineering (Basel) 2022; 9:bioengineering9040148. [PMID: 35447707 PMCID: PMC9025850 DOI: 10.3390/bioengineering9040148] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 12/22/2022] Open
Abstract
Intervertebral disc (IVD) degeneration occurs with natural ageing and is linked to low back pain, a common disease. As an avascular tissue, the microenvironment inside the IVD is harsh. During degeneration, the condition becomes even more compromised, presenting a significant challenge to the survival and function of the resident cells, as well as to any regeneration attempts using cell implantation. Mesenchymal stem cells (MSCs) have been proposed as a candidate stem cell tool for IVD regeneration. Recently, endogenous IVD progenitor cells have been identified inside the IVD, highlighting their potential for self-repair. IVD progenitor cells have properties similar to MSCs, with minor differences in potency and surface marker expression. Currently, it is unclear how IVD progenitor cells react to microenvironmental factors and in what ways they possibly behave differently to MSCs. Here, we first summarized the microenvironmental factors presented in the IVD and their changes during degeneration. Then, we analyzed the available studies on the responses of IVD progenitor cells and MSCs to these factors, and made comparisons between these two types of cells, when possible, in an attempt to achieve a clear understanding of the characteristics of IVD progenitor cells when compared to MSCs; as well as, to provide possible clues to cell fate after implantation, which may facilitate future manipulation and design of IVD regeneration studies.
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12
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1,25(OH)2D3 Mitigates Oxidative Stress-Induced Damage to Nucleus Pulposus-Derived Mesenchymal Stem Cells through PI3K/Akt Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:1427110. [PMID: 35340208 PMCID: PMC8956384 DOI: 10.1155/2022/1427110] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/29/2022] [Accepted: 02/28/2022] [Indexed: 12/11/2022]
Abstract
Intervertebral disc degeneration (IVDD) is one of the main causes of low back pain. The local environment of the degenerated intervertebral disc (IVD) increases oxidative stress and apoptosis of endogenous nucleus pulposus-derived mesenchymal stem cells (NPMSCs) and weakens its ability of endogenous repair ability in degenerated IVDs. A suitable concentration of 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) has been certified to reduce oxidative stress and cell apoptosis. The current study investigated the protective effect and potential mechanism of 1,25(OH)2D3 against oxidative stress-induced damage to NPMSCs. The present results showed that 1,25(OH)2D3 showed a significant protective effect on NPMSCs at a concentration of 10−10 M for 24 h. Protective effects of 1,25(OH)2D3 were also exhibited against H2O2-induced NPMSC senescence, mitochondrial dysfunction, and reduced mitochondrial membrane potential. The Annexin V/PI apoptosis detection assay, TUNEL assay, immunofluorescence, western blot, and real-time quantitative polymerase chain reaction assay showed that pretreatment with 1,25(OH)2D3 could alleviate H2O2-induced NPMSC apoptosis, including the apoptosis rate and the expression of proapoptotic-related (Caspase-3 and Bax) and antiapoptotic-related (Bcl-2) proteins. The intracellular expression of p-Akt increased after pretreatment with 1,25(OH)2D3. However, these protective effects of 1,25(OH)2D3 were significantly decreased after the PI3K/Akt pathway was inhibited by the LY294002 treatment. In vivo, X-ray, MRI, and histological analyses showed that 1,25(OH)2D3 treatment relieved the degree of IVDD in Sprague–Dawley rat disc puncture models. In summary, 1,25(OH)2D3 efficiently attenuated oxidative stress-induced NPMSC apoptosis and mitochondrial dysfunction via PI3K/Akt pathway and is a promising candidate treatment for the repair of IVDD.
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DiStefano TJ, Vaso K, Danias G, Chionuma HN, Weiser JR, Iatridis JC. Extracellular Vesicles as an Emerging Treatment Option for Intervertebral Disc Degeneration: Therapeutic Potential, Translational Pathways, and Regulatory Considerations. Adv Healthc Mater 2022; 11:e2100596. [PMID: 34297485 PMCID: PMC8783929 DOI: 10.1002/adhm.202100596] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 07/08/2021] [Indexed: 12/14/2022]
Abstract
Emergent approaches in regenerative medicine look toward the use of extracellular vesicles (EVs) as a next-generation treatment strategy for intervertebral disc (IVD) degeneration (IVDD) because of their ability to attenuate chronic inflammation, reduce apoptosis, and stimulate proliferation in a number of tissue systems. Yet, there are no Food and Drug Administration (FDA)-approved EV therapeutics in the market with an indication for IVDD, which motivates this article to review the current state of the field and provide an IVD-specific framework to assess its efficacy. In this systematic review, 29 preclinical studies that investigate EVs in relation to the IVD are identified, and additionally, the regulatory approval process is reviewed in an effort to accelerate emerging EV-based therapeutics toward FDA submission and timeline-to-market. The majority of studies focus on nucleus pulposus responses to EV treatment, where the main findings show that stem cell-derived EVs can decelerate the progression of IVDD on the molecular, cellular, and organ level. The findings also highlight the importance of the EV parent cell's pathophysiological and differentiation state, which affects downstream treatment responses and therapeutic outcomes. This systematic review substantiates the use of EVs as a promising cell-free strategy to treat IVDD and enhance endogenous repair.
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Affiliation(s)
- Tyler J. DiStefano
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York NY, USA
| | - Keti Vaso
- Department of Chemical Engineering, The Cooper Union for the Advancement of Science and Art, New York NY, USA
| | - George Danias
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York NY, USA
| | - Henry N. Chionuma
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York NY, USA
| | - Jennifer R. Weiser
- Department of Chemical Engineering, The Cooper Union for the Advancement of Science and Art, New York NY, USA
| | - James C. Iatridis
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York NY, USA
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Zhuang Y, Song S, Xiao D, Liu X, Han X, Du S, Li Y, He Y, Zhang S. Exosomes Secreted by Nucleus Pulposus Stem Cells Derived From Degenerative Intervertebral Disc Exacerbate Annulus Fibrosus Cell Degradation via Let-7b-5p. Front Mol Biosci 2022; 8:766115. [PMID: 35111808 PMCID: PMC8802296 DOI: 10.3389/fmolb.2021.766115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 11/30/2021] [Indexed: 12/21/2022] Open
Abstract
The pathogenesis of intervertebral disc degeneration (IDD) is complex and remains unclear. Nucleus pulposus stem cells (NPSCs) and annulus fibrosus cells (AFCs) play a critical role in the maintenance of intervertebral disc structure and function. Exosome-mediated miRNAs regulate cell proliferation, differentiation, apoptosis, and degradation. However, it is not clear whether the degenerative intervertebral disc-derived nucleus pulposus stem cells (D-NPSCs) can regulate the function of AFCs by delivering exosomes. Here, we show that exosomes secreted by nucleus pulposus stem cells derived from degenerative intervertebral disc (D-DPSC-exo) can exacerbate AFC degeneration via inhibiting cell proliferation, migration, matrix synthesis, and promoting apoptosis. Specifically, let-7b-5p was highly expressed in D-DPSC-exo. Transfection of let-7b-5p mimic was found to promote apoptosis and inhibit proliferation migration and matrix synthesis of AFCs. In addition, transfection with let-7b-5p inhibitor caused the effect of D-DPSC-exo on AFCs to be reversed. Furthermore, we found that D-DPSC-exo and let-7b-5p inhibited IGF1R expression and blocked the activation of the PI3K–Akt pathway. Results suggested that NPSC-exo exacerbated cell degeneration of AFCs via let-7b-5p, accompanied by inhibition of IGF1R expression, and PI3K–Akt pathway activation. Therefore, insights from this work may provide a clue for targeted molecular therapy of intervertebral disc degeneration.
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Affiliation(s)
- Yin Zhuang
- Department of Spine Surgery, Wuxi 9th Affiliated Hospital of Soochow University, Wuxi, China
| | - Sheng Song
- Department of Spine Surgery, Wuxi 9th Affiliated Hospital of Soochow University, Wuxi, China
| | - Dan Xiao
- Department of Spine Surgery, Orthopedics Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Xueguang Liu
- Department of Spine Surgery, Wuxi 9th Affiliated Hospital of Soochow University, Wuxi, China
| | - Xiaofei Han
- Department of Spine Surgery, Wuxi 9th Affiliated Hospital of Soochow University, Wuxi, China
| | - Shihao Du
- Department of Spine Surgery, Wuxi 9th Affiliated Hospital of Soochow University, Wuxi, China
| | - Yuan Li
- Department of Spine Surgery, Wuxi 9th Affiliated Hospital of Soochow University, Wuxi, China
| | - Yanming He
- Department of Spine Surgery, Wuxi 9th Affiliated Hospital of Soochow University, Wuxi, China
| | - Shujun Zhang
- Department of Spine Surgery, Wuxi 9th Affiliated Hospital of Soochow University, Wuxi, China
- *Correspondence: Shujun Zhang,
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15
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Zhu K, Zhao R, Ye Y, Xu G, Zhang C. Effect of lentivirus-mediated growth and differentiation factor-5 transfection on differentiation of rabbit nucleus pulposus mesenchymal stem cells. Eur J Med Res 2022; 27:5. [PMID: 35022077 PMCID: PMC8756615 DOI: 10.1186/s40001-021-00624-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 12/14/2021] [Indexed: 11/24/2022] Open
Abstract
Background Intervertebral disc degeneration (IDD) is a natural progression of age-related processes. Associated with IDD, degenerative disc disease (DDD) is a pathologic condition implicated as a major cause of chronic lower back pain, which can have a severe impact on the quality of life of patients. As degeneration progression is associated with elevated levels of inflammatory cytokines, enhanced aggrecan and collagen degradation, and changes in the disc cell phenotype. The purpose of this study was to investigate the biological and cytological characteristics of rabbit nucleus pulposus mesenchymal stem cells (NPMSCs)—a key factor in IDD—and to determine the effect of the growth and differentiation factor-5 (GDF5) on the differentiation of rabbit NPMSCs transduced with a lentivirus vector. Methods An in vitro culture model of rabbit NPMSCs was established and NPMSCs were identified by flow cytometry (FCM) and quantitative real-time PCR (qRT-PCR). Subsequently, NPMSCs were randomly divided into three groups: a transfection group (the lentiviral vector carrying GDF5 gene used to transfect NPMSCs); a control virus group (the NPMSCs transfected with an ordinary lentiviral vector); and a normal group (the NPMSCs alone). FCM, qRT-PCR, and western blot (WB) were used to detect the changes in NPMSCs. Results The GDF5-transfected NPMSCs displayed an elongated shape, with decreased cell density, and significantly increased GDF5 positivity rate in the transfected group compared to the other two groups (P < 0.01). The mRNA levels of Krt8, Krt18, and Krt19 in the transfected group were significantly higher in comparison with the other two groups (P < 0.01), and the WB results were consistent with that of qRT-PCR. Conclusions GDF5 could induce the differentiation of NPMSCs. The lentiviral vector carrying the GDF5 gene could be integrated into the chromosome genome of NPMSCs and promoted differentiation of NPMSCs into nucleus pulposus cells. Our findings advance the development of feasible and effective therapies for IDD. Supplementary Information The online version contains supplementary material available at 10.1186/s40001-021-00624-5.
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Affiliation(s)
- Kun Zhu
- Department of Orthopaedics, The First Affiliated Hospital of Bengbu Medical College, No. 287, Changhuai Road, Bengbu, 233000, Anhui, China
| | - Rui Zhao
- Department of General Medicine, Bengbu Medical College, Bengbu, China
| | - Yuchen Ye
- Department of Orthopaedics, The First Affiliated Hospital of Bengbu Medical College, No. 287, Changhuai Road, Bengbu, 233000, Anhui, China
| | - Gang Xu
- Department of Orthopaedics, The First Affiliated Hospital of Bengbu Medical College, No. 287, Changhuai Road, Bengbu, 233000, Anhui, China.
| | - Changchun Zhang
- Department of Orthopaedics, The First Affiliated Hospital of Bengbu Medical College, No. 287, Changhuai Road, Bengbu, 233000, Anhui, China.
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16
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Williams RJ, Tryfonidou MA, Snuggs JW, Le Maitre CL. Cell sources proposed for nucleus pulposus regeneration. JOR Spine 2021; 4:e1175. [PMID: 35005441 PMCID: PMC8717099 DOI: 10.1002/jsp2.1175] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/01/2021] [Accepted: 10/20/2021] [Indexed: 12/13/2022] Open
Abstract
Lower back pain (LBP) occurs in 80% of adults in their lifetime; resulting in LBP being one of the biggest causes of disability worldwide. Chronic LBP has been linked to the degeneration of the intervertebral disc (IVD). The current treatments for chronic back pain only provide alleviation of symptoms through pain relief, tissue removal, or spinal fusion; none of which target regenerating the degenerate IVD. As nucleus pulposus (NP) degeneration is thought to represent a key initiation site of IVD degeneration, cell therapy that specifically targets the restoration of the NP has been reviewed here. A literature search to quantitatively assess all cell types used in NP regeneration was undertaken. With key cell sources: NP cells; annulus fibrosus cells; notochordal cells; chondrocytes; bone marrow mesenchymal stromal cells; adipose-derived stromal cells; and induced pluripotent stem cells extensively analyzed for their regenerative potential of the NP. This review highlights: accessibility; expansion capability in vitro; cell survival in an IVD environment; regenerative potential; and safety for these key potential cell sources. In conclusion, while several potential cell sources have been proposed, iPSC may provide the most promising regenerative potential.
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Affiliation(s)
- Rebecca J. Williams
- Biomedical Research Centre, BiosciencesSheffield Hallam UniversitySheffieldUK
| | - Marianna A. Tryfonidou
- Department of Clinical Sciences, Faculty of Veterinary MedicineUtrecht UniversityUtrechtThe Netherlands
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17
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He R, Wang Z, Cui M, Liu S, Wu W, Chen M, Wu Y, Qu Y, Lin H, Chen S, Wang B, Shao Z. HIF1A Alleviates compression-induced apoptosis of nucleus pulposus derived stem cells via upregulating autophagy. Autophagy 2021; 17:3338-3360. [PMID: 33455530 PMCID: PMC8632345 DOI: 10.1080/15548627.2021.1872227] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 12/31/2020] [Indexed: 12/29/2022] Open
Abstract
Intervertebral disc degeneration (IDD) is the primary pathological mechanism that underlies low back pain. Overloading-induced cell death, especially endogenous stem cell death, is the leading factor that undermines intrinsic repair and aggravates IDD. Previous research has separately studied the effect of oxygen concentration and mechanical loading in IDD. However, how these two factors synergistically influence endogenous repair remains unclear. Therefore, we established in vitro and in vivo models to study the mechanisms by which hypoxia interacted with overloading-induced cell death of the nucleus pulposus derived stem cells (NPSCs). We found the content of HIF1A (hypoxia inducible factor 1 subunit alpha) and the number of NPSCs decreased with disc degeneration in both rats and human discs. Hence, we isolated this subpopulation from rat discs and treated them simultaneously with hypoxia and excessive mechanical stress. Our results demonstrated that hypoxia exerted protective effect on NPSCs under compression, partially through elevating macroautophagy/autophagy. Proteomics and knockdown experiments further revealed HIF1A-BNIP3-ATG7 axis mediated the increase in autophagy flux, in which HMOX1 and SLC2A1 were also involved. Moreover, HIF1A-overexpressing NPSCs exhibited stronger resistance to over-loading induced apoptosis in vitro. They also showed higher survival rates, along with elevated autophagy after being intra-disc transplanted into over-loaded discs. Jointly, both in vivo and in vitro experiments proved the anti-apoptotic effect of HIF1A on NPSCs under the excessive mechanical loading, suggesting that restoring hypoxia and manipulating autophagy is crucial to maintain the intrinsic repair and to retard disc degeneration.Abbreviations: 3-MA: 3-methyladenine; ACAN: aggrecan; ATG7: autophagy related 7; BafA1: bafilomycin A1; BAX: BCL2 associated X, apoptosis regulator; BECN1: beclin 1; BNIP3: BCL2 interacting protein 3; BNIP3L: BCL2 interacting protein 3 like; CASP3: caspase 3; CCK8: cell counting kit-8; CHT: chetomin; CMP: compression; CoCl2: cobalt chloride; COL2A1: collagen type II alpha 1 chain; Ctrl: control; DAPI: 4,6-diamidino-2-phenylindole; DEP: differentially expressed protein; DiR: 1,1-dioctadecyl-3,3,3,3-tetramethyl indotricarbocyanine; ECM: extracellular matrix; FCM: flow cytometry; GD2: disialoganglioside GD 2; GFP: green fluorescent protein; GO: gene ontology; GSEA: gene set enrichment analysis; H&E: hematoxylin-eosin; HIF1A: hypoxia inducible factor 1 subunit alpha; HK2: hexokinase 2; HMOX1: heme oxygenase 1; HX: hypoxia mimicry; IDD: intervertebral disc degeneration; IF: immunofluorescence; IHC: immunohistochemistry; IVD: intervertebral disc; KEGG: kyoto encyclopedia of genes and genomes; LBP: low back pain; Lv: lentivirus; MAP1LC3B/LC3B: microtubule associated protein 1 light chain 3 beta; MMP: mitochondrial membrane potential; NC: negative control; NIR: near-infrared; NP: nucleus pulposus; NPC: nucleus pulposus cell; NPSC: nucleus pulposus derived stem cell; NX: normoxia; PPI: protein-protein interactions; RFP: red fluorescent protein; SLC2A1/GLUT1: solute carrier family 2 member 1; SQSTM1/p62: sequestosome 1; TEK/TIE2: TEK receptor tyrosine kinase; TEM: transmission electron microscopy; TUBB: tubulin beta class I.
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Affiliation(s)
- Ruijun He
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Zhe Wang
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Min Cui
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sheng Liu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Wu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Mo Chen
- Department of Health Management, School of Medicine and Health Management, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yongchao Wu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yanji Qu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, China
| | - Hui Lin
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sheng Chen
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Baichuan Wang
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zengwu Shao
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Intervertebral Disc Stem/Progenitor Cells: A Promising "Seed" for Intervertebral Disc Regeneration. Stem Cells Int 2021; 2021:2130727. [PMID: 34367292 PMCID: PMC8342144 DOI: 10.1155/2021/2130727] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 07/08/2021] [Indexed: 12/11/2022] Open
Abstract
Intervertebral disc (IVD) degeneration is considered to be the primary reason for low back pain (LBP), which has become more prevalent from 21 century, causing an enormous economic burden for society. However, in spite of remarkable improvements in the basic research of IVD degeneration (IVDD), the effects of clinical treatments of IVDD are still leaving much to be desired. Accumulating evidence has proposed the existence of endogenous stem/progenitor cells in the IVD that possess the ability of proliferation and differentiation. However, few studies have reported the biological properties and potential application of IVD progenitor cells in detail. Even so, these stem/progenitor cells have been consumed as a promising cell source for the regeneration of damaged IVD. In this review, we will first introduce IVD, describe its physiology and stem/progenitor cell niche, and characterize IVDSPCs between homeostasis and IVD degeneration. We will then summarize recent studies on endogenous IVDSPC-based IVD regeneration and exogenous cell-based therapy for IVDD. Finally, we will discuss the potential applications and future developments of IVDSPC-based repair of IVD degeneration.
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19
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Zhang Q, Shen Y, Zhao S, Jiang Y, Zhou D, Zhang Y. Exosomes miR-15a promotes nucleus pulposus-mesenchymal stem cells chondrogenic differentiation by targeting MMP-3. Cell Signal 2021; 86:110083. [PMID: 34252537 DOI: 10.1016/j.cellsig.2021.110083] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 06/29/2021] [Accepted: 07/07/2021] [Indexed: 12/27/2022]
Abstract
The physiology of the nucleus pulposus (NP) in intervertebral disc degeneration (IVD) has been studied widely. However, interactions involving nucleus pulposus -mesenchymal stem cells (NP-MSCs) are less understood. MicroRNA 15a (miR-15a) is known to target and modulate genes involved in cellular proliferation and apoptosis. This study aimed to understand the interactions and impact of miR-15a and NP-MSCs on chondrogenic differentiation and IVD degeneration. Exosomes secreted by NP cells were purified by differential centrifugation and identified by transmission electron microscopy and exosomal markers. Further, by co-culture these exosomes were re-introduced into the NP-MSC cells, which were confirmed by fluorescence confocal microscopy. NP-MSCs treated with exo-miR-15a increases aggrecan and collagen II mRNA and protein levels while decreasing mRNA and protein levels of ADAMTS4/5 and MMP-3/-13. Toluidine blue staining confirmed that chondrogenic differentiation was increased in NP-MSCs treated with exo-miR-15a. NP-MSCs treated with exo-anti-miR-15a inhibit aggrecan and collagen II expression while increasing ADAMTS4/5 and MMP-3/-13 expression and decreasing chondrogenic differentiation. Dual-luciferase reporter assays revealed that miR-15a directly targets MMP-3 and downregulates its expression. Overexpression of miR-15a increased proliferation and colony formation, whereas combinatorial overexpression with MMP3, suppressed miR-15a's effects. This was also evident through the decreased phosphorylation of PI3K and Akt, upregulation of Wnt3a and β-catenin in the presence of miR-15a, but overexpression of MMP3 indicated an opposite effect. Overall, these data demonstrate that exo-miR-15a promotes NP-MSCs chondrogenic differentiation by downregulating MMP-3 through PI3K/Akt and Wnt3a/β-catenin axis.
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Affiliation(s)
- Qiang Zhang
- Department of Orthopedics, The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University, Changzhou, Jiangsu 213003, China
| | - Yifei Shen
- Department of Orthopedics, The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University, Changzhou, Jiangsu 213003, China
| | - Shujie Zhao
- Department of Orthopedics, The People's Hospital of Jiangsu Province, Nanjing, Jiangsu 210029, China
| | - Yuqing Jiang
- Department of Orthopedics, The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University, Changzhou, Jiangsu 213003, China
| | - Dong Zhou
- Department of Orthopedics, The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University, Changzhou, Jiangsu 213003, China.
| | - Yunkun Zhang
- Department of Orthopedics, The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University, Changzhou, Jiangsu 213003, China.
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Liu Y, Liu H, Meng Y, Zhang L. [Research progress of endogenous repair strategy in intervertebral disc]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2021; 35:636-641. [PMID: 33998219 DOI: 10.7507/1002-1892.202012070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective To review the research progress of endogenous repair strategy (ERS) in intervertebral disc (IVD). Methods The domestic and foreign literature related to ERS in IVD in recent years was reviewed, and its characteristics, status, and prospect in the future were summarized. Results The key of ERS in IVD is to improve the vitality of stem/progenitor cells in IVD or promote its migration from stem cell Niche to the tissue that need to repair. These stem/progenitor cells in IVD are derived from nucleus pulposus, annulus fibrosus, and cartilaginous endplate, showing similar biological characteristics to mesenchymal stem cells including the expression of the specific stem/progenitor cell surface markers and gene, and also the capacity of multiple differentiations potential. However, the development, senescence, and degeneration of IVD have consumed these stem/progenitor cells, and the harsh internal microenvironment further impair their biological characteristics, which leads to the failure of endogenous repair in IVD. At present, relevant research mainly focuses on improving the biological characteristics of endogenous stem/progenitor cells, directly supplementing endogenous stem/progenitor cells, biomaterials and small molecule compounds to stimulate the endogenous repair in IVD, so as to improve the effect of endogenous repair. Conclusion At present, ERS has gotten some achievements in the treatment of IVD degeneration, but its related studies are still in the pre-clinical stage. So further studies regarding ERS should be carried out in the future, especially in vivo experiments and clinical transformation.
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Affiliation(s)
- Yang Liu
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Hao Liu
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Yang Meng
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Liang Zhang
- Department of Orthopedics, Northern Jiangsu People's Hospital, Yangzhou Jiangsu, 225000, P.R.China
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The preconditioning of lithium promotes mesenchymal stem cell-based therapy for the degenerated intervertebral disc via upregulating cellular ROS. Stem Cell Res Ther 2021; 12:239. [PMID: 33853670 PMCID: PMC8048279 DOI: 10.1186/s13287-021-02306-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 03/22/2021] [Indexed: 02/07/2023] Open
Abstract
Abstract Adipose-derived stem cell (ADSC) is one of the most widely used candidate cell for intervertebral disc (IVD) degeneration-related disease. However, the poor survival and low differentiation efficacy in stressed host microenvironment limit the therapeutic effects of ADSC-based therapy. The preconditioning has been found effective to boost the proliferation and the functioning of stem cells in varying pathological condition. Lithium is a common anti-depression drug and has been proved effective to enhance stem cell functioning. In this study, the effects of preconditioning using LiCl on the cellular behavior of ADSC was investigated, and specially in a degenerative IVD-like condition. Method The cellular toxicity on rat ADSC was assessed by detecting lactate dehydrogenase (LDH) production after treatment with a varying concentration of lithium chloride (LiCl). The proliferative capacity of ADSC was determined by detecting Ki67 expression and the relative cell number of ADSC. Then, the preconditioned ADSC was challenged by a degenerative IVD-like condition. And the cell viability as well as the nucleus pulpous (NP) cell differentiation efficacy of preconditioned ADSC was evaluated by detecting the major marker expression and extracellular matrix (ECM) deposit. The therapeutic effects of preconditioned ADSC were evaluated using an IVD degeneration rat model, and the NP morphology and ECM content were assessed. Results A concentration range of 1–10 mmol/L of LiCl was applied in the following study, since a higher concentration of LiCl causes a major cell death (about 40%). The relative cell number was similar between preconditioned groups and the control group after preconditioning. The Ki67 expression was elevated after preconditioning. Consistently, the preconditioned ADSC showed stronger proliferation capacity. Besides, the preconditioned groups exhibit higher expression of NP markers than the control group after NP cell induction. Moreover, the preconditioning of LiCl reduced the cell death and promoted ECM deposits, when challenged with a degenerative IVD-like culture. Mechanically, the preconditioning of LiCl induced an increased cellular reactive oxidative species (ROS) level and activation of ERK1/2, which was found closely related to the enhanced cell survival and ECM deposits after preconditioning. The treatment with preconditioned ADSC showed better therapeutic effects than control ADSC transplantation, with better NP preservation and ECM deposits. Conclusion These results suggest that the preconditioning with a medium level of LiCl boosts the cell proliferation and differentiation efficacy under a normal or hostile culture condition via the activation of cellular ROS/ERK axis. It is a promising pre-treatment of ADSC to promote the cell functioning and the following regenerative capacity, with superior therapeutic effects than untreated ADSC transplantation.
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ASIC1 and ASIC3 mediate cellular senescence of human nucleus pulposus mesenchymal stem cells during intervertebral disc degeneration. Aging (Albany NY) 2021; 13:10703-10723. [PMID: 33824228 PMCID: PMC8064223 DOI: 10.18632/aging.202850] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 02/16/2021] [Indexed: 12/22/2022]
Abstract
Stem cell approaches have become an attractive therapeutic option for intervertebral disc degeneration (IVDD). Nucleus pulposus mesenchymal stem cells (NP-MSCs) participate in the regeneration and homeostasis of the intervertebral disc (IVD), but the molecular mechanisms governing these processes remain to be elucidated. Acid-sensing ion channels (ASICs) which act as key receptors for extracellular protons in central and peripheral neurons, have been implicated in IVDD where degeneration is associated with reduced microenvironmental pH. Here we show that ASIC1 and ASIC3, but not ASIC2 and ASIC4 are upregulated in human IVDs according to the degree of clinical degeneration. Subjecting IVD-derived NP-MSCs to pH 6.6 culture conditions to mimic pathological IVD changes resulted in decreased cell proliferation that was associated with cell cycle arrest and induction of senescence. Key molecular changes observed were increased expression of p53, p21, p27, p16 and Rb1. Instructively, premature senescence in NP-MSCs could be largely alleviated using ASIC inhibitors, suggesting both ASIC1 and ASIC3 act decisively upstream to activate senescence programming pathways including p53-p21/p27 and p16-Rb1 signaling. These results highlight the potential of ASIC inhibitors as a therapeutic approach for IVDD and broadly define an in vitro system that can be used to evaluate other IVDD therapies.
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Zhang Y, Hu Y, Wang W, Guo Z, Yang F, Cai X, Xiong L. Current Progress in the Endogenous Repair of Intervertebral Disk Degeneration Based on Progenitor Cells. Front Bioeng Biotechnol 2021; 8:629088. [PMID: 33553131 PMCID: PMC7862573 DOI: 10.3389/fbioe.2020.629088] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 12/31/2020] [Indexed: 12/19/2022] Open
Abstract
Intervertebral disk (IVD) degeneration is one of the most common musculoskeletal disease. Current clinical treatment paradigms for IVD degeneration cannot completely restore the structural and biomechanical functions of the IVD. Bio-therapeutic techniques focused on progenitor/stem cells, especially IVD progenitor cells, provide promising options for the treatment of IVD degeneration. Endogenous repair is an important self-repair mechanism in IVD that can allow the IVD to maintain a long-term homeostasis. The progenitor cells within IVD play a significant role in IVD endogenous repair. Improving the adverse microenvironment in degenerative IVD and promoting progenitor cell migration might be important strategies for implementation of the modulation of endogenous repair of IVD. Here, we not only reviewed the research status of treatment of degenerative IVD based on IVD progenitor cells, but also emphasized the concept of endogenous repair of IVD and discussed the potential new research direction of IVD endogenous repair.
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Affiliation(s)
- Yanbin Zhang
- Department of Orthopaedics, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Yiqiang Hu
- Department of Orthopaedics, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Wentian Wang
- Department of Orthopaedics, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Zijun Guo
- Department of Orthopaedics, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Fan Yang
- Department of Orthopaedics, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Xianyi Cai
- Department of Orthopaedics, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Liming Xiong
- Department of Orthopaedics, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
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Nan LP, Wang F, Liu Y, Wu Z, Feng XM, Liu JJ, Zhang L. 6-gingerol protects nucleus pulposus-derived mesenchymal stem cells from oxidative injury by activating autophagy. World J Stem Cells 2020; 12:1603-1622. [PMID: 33505603 PMCID: PMC7789124 DOI: 10.4252/wjsc.v12.i12.1603] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 08/30/2020] [Accepted: 09/22/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND To date, there has been no effective treatment for intervertebral disc degeneration (IDD). Nucleus pulposus-derived mesenchymal stem cells (NPMSCs) showed encouraging results in IDD treatment, but the overexpression of reactive oxygen species (ROS) impaired the endogenous repair abilities of NPMSCs. 6-gingerol (6-GIN) is an antioxidant and anti-inflammatory reagent that might protect NPMSCs from injury.
AIM To investigate the effect of 6-GIN on NPMSCs under oxidative conditions and the potential mechanism.
METHODS The cholecystokinin-8 assay was used to evaluate the cytotoxicity of hydrogen peroxide and the protective effects of 6-GIN. ROS levels were measured by 2´7´-dichlorofluorescin diacetate analysis. Matrix metalloproteinase (MMP) was detected by the tetraethylbenzimidazolylcarbocyanine iodide assay. TUNEL assay and Annexin V/PI double-staining were used to determine the apoptosis rate. Additionally, autophagy-related proteins (Beclin-1, LC-3, and p62), apoptosis-associated proteins (Bcl-2, Bax, and caspase-3), and PI3K/Akt signaling pathway-related proteins (PI3K and Akt) were evaluated by Western blot analysis. Autophagosomes were detected by transmission electron microscopy in NPMSCs. LC-3 was also detected by immunofluorescence. The mRNA expression of collagen II and aggrecan was evaluated by real-time polymerase chain reaction (RT-PCR), and the changes in collagen II and MMP-13 expression were verified through an immunofluorescence assay.
RESULTS 6-GIN exhibited protective effects against hydrogen peroxide-induced injury in NPMSCs, decreased hydrogen peroxide-induced intracellular ROS levels, and inhibited cell apoptosis. 6-GIN could increase Bcl-2 expression and decrease Bax and caspase-3 expression. The MMP, Annexin V-FITC/PI flow cytometry and TUNEL assay results further confirmed that 6-GIN treatment significantly inhibited NPMSC apoptosis induced by hydrogen peroxide. 6-GIN treatment promoted extracellular matrix (ECM) expression by reducing the oxidative stress injury-induced increase in MMP-13 expression. 6-GIN activated autophagy by increasing the expression of autophagy-related markers (Beclin-1 and LC-3) and decreasing the expression of p62. Autophagosomes were visualized by transmission electron microscopy. Pretreatment with 3-MA and BAF further confirmed that 6-GIN-mediated stimulation of autophagy did not reduce autophagosome turnover but increased autophagic flux. The PI3K/Akt pathway was also found to be activated by 6-GIN. 6-GIN inhibited NPMSC apoptosis and ECM degeneration, in which autophagy and the PI3K/Akt pathway were involved.
CONCLUSION 6-GIN efficiently decreases ROS levels, attenuates hydrogen peroxide-induced NPMSCs apoptosis, and protects the ECM from degeneration. 6-GIN is a promising candidate for treating IDD.
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Affiliation(s)
- Li-Ping Nan
- Department of Orthopedic, Tongji University School of Medicine, Shanghai Tenth People’s Hospital, Tenth People’s Hospital of Tongji University, Shanghai 200072, China
| | - Feng Wang
- Department of Spine Surgery, Tongji University School of Medicine, Shanghai East Hospital, Shanghai 200120, China
| | - Yang Liu
- Department of Orthopedic, West China Hospital of Sichuan University, Chengdu 610000, Sichuan Province, China
| | - Zhong Wu
- Department of Orthopedics, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Xin-Min Feng
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
| | - Jun-Jian Liu
- Department of Orthopedics, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Liang Zhang
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
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Li Z, Chen S, Ma K, He R, Xiong L, Hu Y, Deng X, Yang A, Ma X, Shao Z. Comparison of different methods for the isolation and purification of rat nucleus pulposus-derived mesenchymal stem cells. Connect Tissue Res 2020; 61:426-434. [PMID: 31203667 DOI: 10.1080/03008207.2019.1611793] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE Recently, nucleus pulposus-derived mesenchymal stem cells (NPMSCs) have been identified and have shown good prospects for the repair of degenerative intervertebral discs. However, there is no consensus about the methods for the isolation and purification of NPMSCs. Therefore, a reliable and efficient isolation and purification method is potentially needed. We aimed to compare different methods and to identify an optimal method for isolating and purifying NPMSCs. METHODS NPMSCs were isolated and purified using two common methods (a low-density culture (LD) method and a mesenchymal stem cell complete medium culture (MSC-CM) method) and two novel methods (a cloning cylinder (CC) method and a combination of the CC and MSC-CM methods (MSC-CM+CC)). The morphology, MSC-specific surface markers (CD44, CD73, CD90, CD105, CD34 and HLA-DR), multiple-lineage differentiation potential, colony formation ability, and stemness gene (Oct4, Nanog, and Sox2) expression were evaluated and compared. RESULTS NPMSCs isolated from nucleus pulposus (NP) tissues via the four methods met the criteria stated by the International Society of Cell Therapy (ISCT) for MSCs, including adherent growth ability, MSC-specific surface antigen expression, and multi-lineage differentiation potential. In particular, the MSC-CM+CC method yielded a relatively higher quality of NPMSCs in terms of cell surface markers, multiple-lineage differentiation potential, colony formation ability, and stemness gene expression. CONCLUSIONS Our results indicated that NPMSCs can be obtained via all four methods and that the MSC-CM+CC method is more reliable and efficient than the other three methods. The findings from this study provide an alternative option for isolating and purifying NPMSCs.
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Affiliation(s)
- Zhiliang Li
- Department of Orthopedics, Renmin Hospital of Wuhan University , Wuhan, China
| | - Sheng Chen
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
| | - Kaige Ma
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
| | - Ruijun He
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
| | - Liming Xiong
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
| | - Yiqiang Hu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
| | - Xiangyu Deng
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
| | - Aoxue Yang
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
| | - Xuan Ma
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
| | - Zengwu Shao
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China
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Zeng X, Lin J, Wu H, Yu J, Tu M, Cheang LH, Zhang J. Effect of Conditioned Medium from Human Umbilical Cord-Derived Mesenchymal Stromal Cells on Rejuvenation of Nucleus Pulposus Derived Stem/Progenitor Cells from Degenerated Intervertebral Disc. Int J Stem Cells 2020; 13:257-267. [PMID: 32587132 PMCID: PMC7378895 DOI: 10.15283/ijsc20027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/08/2020] [Accepted: 04/14/2020] [Indexed: 01/07/2023] Open
Abstract
Background and Objectives Mesenchymal stromal cells (MSCs)-based treatment for degeneration of intervertebral disc (IVD) has been proposed recently. We here addressed whether MSC secreted factors can rejuvenate nucleus pulposus-derived stem/progenitor cells from degenerated disc (D-NPSCs) in vitro. Methods and Results We analyzed the expression of MSCs and NP cell specific surface markers, pluripotency related genes, multilineage potential and cell proliferative capacity of D-NPSCs upon incubation with the conditioned medium which was collected from the umbilical cord derived MSCs (UCMSCs). Our results indicated that the conditioned medium restore the stemness of D-NPSCs by up-regulating the expression level of CD29 and CD105, pluripotency related genes OCT4 and Nanog, and NP progenitor marker Tie2. The increased stemness was accompanied by promoted cell proliferative capacity and improved osteogenic and chondrogenic differentiation potential. Conclusions Our findings suggested that the UCMSCs derived conditioned medium might be used to rejuvenate the degenerated NP stem/progenitor cells.
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Affiliation(s)
- Xiaoli Zeng
- Department of Biochemistry and Molecular Biology, School of Preclinical Medicine, Jinan University, Guangzhou, China
| | - Jinhua Lin
- Department of Biochemistry and Molecular Biology, School of Preclinical Medicine, Jinan University, Guangzhou, China
| | - Hao Wu
- Department of Orthopedic Surgery, The First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Jiayue Yu
- Department of Biochemistry and Molecular Biology, School of Preclinical Medicine, Jinan University, Guangzhou, China
| | - Mei Tu
- Department of Materials Science and Engineering, Jinan University, Guangzhou, China
| | - Lek Hang Cheang
- Department of Orthopedic Surgery, Centro Hospitalar Conde de Sao Januario, Macao, China
| | - Jiaqing Zhang
- Department of Biochemistry and Molecular Biology, School of Preclinical Medicine, Jinan University, Guangzhou, China
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Guo Y, Meng Y, Liu H, Wang B, Ding C, Rong X, Yang Y, Hong Y. Acid-sensing ion channels mediate the degeneration of intervertebral disc via various pathways-A systematic review. Channels (Austin) 2020; 13:367-373. [PMID: 31526163 PMCID: PMC6768050 DOI: 10.1080/19336950.2019.1664038] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
To elucidate the pathological significance of acid-sensing ion channels (ASICs) in intervertebral disc degeneration (IVDD), the database of Medline, Web of Science, and EmBase were carefully screened. Search terms used in each database varied slightly to optimize results. Data relating to the correlation between ASICs and IVDD was systematically collected and integrated into the review. 11 basic science studies, containing the related information, were finally identified for inclusion. Intervertebral disc degeneration (IVDD) is a common disease in middle-aged and elderly people, which has a great impact on patients’ quality of life. Many research teams have attempted to elucidate the pathogenesis of this degenerative disease, and have made considerable progress. Acid-sensing ion channels (ASICs) were once reported to be able to regulate the apoptosis process of chondrocytes in joint cartilage, which has been transplanted into the IVDD-related research. ASIC1a functions as the mediator for cells in nucleus pulposus (NP) and endplate (EP), with whose activation the apoptosis process would be accelerated. Moreover, ASIC1a’s activation could also regulate the anabolism in chondrocytes of EP, facilitating the degeneration. ASIC3 would only promote the degeneration in NP, possibly via its pro-inflammatory effect. The distribution of ASICs in NP, EP, annulus fibrosus, and the particular functions of ASIC1a and ASIC3 remind us about the pathological significance of ASICs in IVDD, which could be a promising therapeutic target in future treatment for IVDD.
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Affiliation(s)
- Yingjun Guo
- Department of Orthopedic Surgery, West China Hospital, Sichuan University , Chengdu , Sichuan Province , China
| | - Yang Meng
- Department of Orthopedic Surgery, West China Hospital, Sichuan University , Chengdu , Sichuan Province , China
| | - Hao Liu
- Department of Orthopedic Surgery, West China Hospital, Sichuan University , Chengdu , Sichuan Province , China
| | - Beiyu Wang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University , Chengdu , Sichuan Province , China
| | - Chen Ding
- Department of Orthopedic Surgery, West China Hospital, Sichuan University , Chengdu , Sichuan Province , China
| | - Xin Rong
- Department of Orthopedic Surgery, West China Hospital, Sichuan University , Chengdu , Sichuan Province , China
| | - Yi Yang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University , Chengdu , Sichuan Province , China
| | - Ying Hong
- Department of Orthopedic Surgery, West China Hospital, Sichuan University , Chengdu , Sichuan Province , China
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Liu Y, Li Y, Nan LP, Wang F, Zhou SF, Feng XM, Liu H, Zhang L. Insights of stem cell-based endogenous repair of intervertebral disc degeneration. World J Stem Cells 2020; 12:266-276. [PMID: 32399135 PMCID: PMC7202923 DOI: 10.4252/wjsc.v12.i4.266] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 03/26/2020] [Accepted: 04/05/2020] [Indexed: 02/06/2023] Open
Abstract
Low back pain has become more prevalent in recent years, causing enormous economic burden for society and government. Common therapies used in clinics including conservative treatment and surgery can only relieve pain. Subsequent cell-based treatment such as mesenchymal stem cell transplantation poses problems such as short duration of therapeutic effect and tumorigenesis. Recently, the discovery and identification of stem cell niche and stem/progenitor cells in intervertebral disc bring increased attention to endogenous repair strategy. Therefore, we review the studies involving endogenous repair strategy and present the characteristics and current status of this treatment. Meanwhile, we also discuss the strategy and perspective of endogenous repair strategy in future.
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Affiliation(s)
- Yang Liu
- Department of Orthopedics, West China Hospital of Sichuan University, Chengdu 610000, Sichuan Province, China
- Department of Orthopedics, Dalian Medical University, Dalian 116000, Liaoning Province, China
| | - Yan Li
- Department of Oncology, The Affiliated Cancer Hospital, School of Medicine, UESTC, Chengdu 610000, Sichuan Province, China
| | - Li-Ping Nan
- Department of Orthopedics, Dalian Medical University, Dalian 116000, Liaoning Province, China
| | - Feng Wang
- Department of Orthopedics, Dalian Medical University, Dalian 116000, Liaoning Province, China
| | - Shi-Feng Zhou
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
| | - Xin-Min Feng
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
| | - Hao Liu
- Department of Orthopedics, West China Hospital of Sichuan University, Chengdu 610000, Sichuan Province, China
| | - Liang Zhang
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
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Chen Y, Tang L. Stem Cell Senescence: the Obstacle of the Treatment of Degenerative Disk Disease. Curr Stem Cell Res Ther 2020; 14:654-668. [PMID: 31490764 DOI: 10.2174/1574888x14666190906163253] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/05/2019] [Accepted: 06/01/2019] [Indexed: 12/14/2022]
Abstract
Intervertebral disc (IVD) has a pivotal role in the maintenance of flexible motion. IVD degeneration is one of the primary causes of low back pain and disability, which seriously influences patients' health, and increases the family and social economic burden. Recently, stem cell therapy has been proven to be more effective on IVD degeneration disease. However, stem cell senescence is the limiting factor in the IVD degeneration treatment. Senescent stem cells have a negative effect on the self-repair on IVD degeneration. In this review, we delineate that the factors such as telomerase shortening, DNA damage, oxidative stress, microenvironment and exosomes will induce stem cell aging. Recent studies tried to delay the aging of stem cells by regulating the expression of aging-related genes and proteins, changing the activity of telomerase, improving the survival microenvironment of stem cells and drug treatment. Understanding the mechanism of stem cell aging and exploring new approaches to delay or reverse stem cell aging asks for research on the repair of the degenerated disc.
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Affiliation(s)
- Ying Chen
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering Chongqing University, Chongqing 400044, China
| | - Liling Tang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering Chongqing University, Chongqing 400044, China
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Zhou Y, Wang Z, Chen X, Zhang J, Yang L, Liu S, Liu Y. Identification of differentially expressed miRNAs and mRNAs in synovial of osteoarthritis via RNA-sequencing. BMC MEDICAL GENETICS 2020; 21:46. [PMID: 32122327 PMCID: PMC7053084 DOI: 10.1186/s12881-020-0978-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 02/19/2020] [Indexed: 01/02/2023]
Abstract
Background Osteoarthritis (OA) is the most common form of arthritis and a leading cause of disability. This study attempted to investigate the key mRNAs and miRNAs related to OA. Patients and methods From April 17th, 2018 to May 17th, 2018, five patients with OA and three normal controls were enrolled in this present study. To identify the differentially expressed mRNAs (DEmRNAs) and miRNAs (DEmiRNAs) between patients with OA and normal controls, RNA-sequencing was performed. Then, DEmiRNA-target DEmRNAs analysis and functional annotation of DEmiRNA-target DEmRNAs were performed. To validate the RNA-sequencing results, quantitative real time-PCR (RT-PCR) and western blot analysis were performed as well. Results A total of 1068 DEmRNAs, 21 DEmiRNAs and 395 DEmiRNA-DEmRNA pairs were identified in synovial tissues of patients with OA. The functional annotation of DEmiRNA-target DEmRNAs revealed that Pathways in cancer and PI3K-Akt signaling pathway were significantly enriched Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways. QRT-PCR and western blot results revealed that except for TLR7, the expression level of the others was consistent with the RNA-sequencing results, generally. Conclusion The findings of this present study may provide new clues for the roles of DEmRNAs and DEmiRNAs in the pathogenesis of OA.
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Affiliation(s)
- Yu Zhou
- Department of Orthopedics, People's Hospital of Deyang City, No. 173, Taishan North Road, Jingyang District, Deyang, 618000, Sichuan, China
| | - Zhicong Wang
- Department of Orthopedics, People's Hospital of Deyang City, No. 173, Taishan North Road, Jingyang District, Deyang, 618000, Sichuan, China
| | - Xi Chen
- Department of Orthopedics, People's Hospital of Deyang City, No. 173, Taishan North Road, Jingyang District, Deyang, 618000, Sichuan, China.
| | - Jianjun Zhang
- Department of Orthopedics, People's Hospital of Deyang City, No. 173, Taishan North Road, Jingyang District, Deyang, 618000, Sichuan, China
| | - Ling Yang
- Department of Orthopedics, People's Hospital of Deyang City, No. 173, Taishan North Road, Jingyang District, Deyang, 618000, Sichuan, China
| | - Shuping Liu
- Department of Orthopedics, People's Hospital of Deyang City, No. 173, Taishan North Road, Jingyang District, Deyang, 618000, Sichuan, China
| | - Yuehong Liu
- Department of Orthopedics, People's Hospital of Deyang City, No. 173, Taishan North Road, Jingyang District, Deyang, 618000, Sichuan, China.
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Farhang N, Silverman L, Bowles RD. Improving Cell Therapy Survival and Anabolism in Harsh Musculoskeletal Disease Environments. TISSUE ENGINEERING PART B-REVIEWS 2020; 26:348-366. [PMID: 32070243 DOI: 10.1089/ten.teb.2019.0324] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Cell therapies are an up and coming technology in orthopedic medicine that has the potential to provide regenerative treatments for musculoskeletal disease. Despite numerous cell therapies showing preclinical success for common musculoskeletal indications of disc degeneration and osteoarthritis, there have been mixed results when testing these therapies in humans during clinical trials. A theory behind the mixed success of these cell therapies is that the harsh microenvironments of the disc and knee they are entering inhibit their anabolism and survival. Therefore, there is much ongoing research looking into how to improve the survival and anabolism of cell therapies within these musculoskeletal disease environments. This includes research into improving cell function under specific microenvironmental conditions known to exist in the intervertebral disc (IVD) and knee environment such as hypoxia, low-nutrient conditions, hyperosmolarity, acidity, and inflammation. This research also includes improving differentiation of cells into desired native cell phenotypes to better enhance their survival and anabolism in the knee and IVD. This review highlights the effects of specific musculoskeletal microenvironmental challenges on cell therapies and what research is being done to overcome these challenges. Impact statement While there has been significant clinical interest in using cell therapies for musculoskeletal pathologies in the knee and intervertebral disc, cell therapy clinical trials have had mixed outcomes. The information presented in this review includes the environmental challenges (i.e., acidic pH, inflammation, hyperosmolarity, hypoxia, and low nutrition) that cell therapies experience in these pathological musculoskeletal environments. This review summarizes studies that describe various approaches to improving the therapeutic capability of cell therapies in these harsh environments. The result is an overview of what approaches can be targeted and/or combined to develop a more consistent cell therapy for musculoskeletal pathologies.
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Affiliation(s)
- Niloofar Farhang
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah, USA
| | | | - Robby D Bowles
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah, USA
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Abstract
Intervertebral disc (IVD) degeneration is associated with low back pain. In IVDs, a high mechanical load, high osmotic pressure and hypoxic conditions create a hostile microenvironment for resident cells. How IVD homeostasis and function are maintained under stress remains to be understood; however, several research groups have reported isolating native endogenous progenitor-like or otherwise proliferative cells from the IVD. The isolation of such cells implies that the IVD might contain a quiescent progenitor-like population that could be activated for IVD repair and regeneration. Increased understanding of endogenous disc progenitor cells will improve our knowledge of IVD homeostasis and, when combined with tissue engineering techniques, might hold promise for future therapeutic applications. In this Review, the characteristics of progenitor cells in different IVD compartments are discussed, as well as the potency of different cell populations within the IVD. The stem cell characteristics of these cells are also compared with those of mesenchymal stromal cells. On the basis of existing evidence, whether and how IVD degeneration and the hostile microenvironment might affect endogenous progenitor cell function are considered, and ways to channel the potential of these cells for IVD repair are suggested.
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Zhou X, Zhang F, Wang D, Wang J, Wang C, Xia K, Ying L, Huang X, Tao Y, Chen S, Xue D, Hua J, Liang C, Chen Q, Li F. Micro Fragmented Adipose Tissue Promotes the Matrix Synthesis Function of Nucleus Pulposus Cells and Regenerates Degenerated Intervertebral Disc in a Pig Model. Cell Transplant 2020; 29:963689720905798. [PMID: 32030997 PMCID: PMC7444234 DOI: 10.1177/0963689720905798] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Intervertebral disc (IVD) degeneration and consequent lower back pain is a common
disease. Micro fragmented adipose tissue (MFAT) is promising for a wide range of
applications in regenerative medicine. In this study, MFAT was isolated by a
nonenzymatic method and co-cultured with nucleus pulposus cells (NPCs) using an
indirect co-culture system in vitro. A pig disc degeneration
model was used to investigate the regenerative effect of MFAT on degenerated
IVDs in vivo. The mRNA expression of Sox9,
Acan, and Col2 in NPCs was significantly
increased, while no significant increase was observed in the mRNA expression of
proinflammatory cytokine genes after the NPCs were co-cultured with MFAT.
Nucleus pulposus (NP)-specific markers were increased in MFAT cells after
co-culture with NPCs. After injection of MFAT, the disc height, water content,
extracellular matrix, and structure of the degenerated NP were significantly
improved. MFAT promoted the matrix synthesis function of NPCs, and NPCs
stimulated the NP-like differentiation of MFAT cells. In addition, MFAT also
partly regenerated degenerated IVDs in the pig model.
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Affiliation(s)
- Xiaopeng Zhou
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China.,These authors contributed equally to this article
| | - Feng Zhang
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China.,These authors contributed equally to this article
| | - Dawei Wang
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,These authors contributed equally to this article
| | - Jingkai Wang
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China.,These authors contributed equally to this article
| | - Chenggui Wang
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Kaishun Xia
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Liwei Ying
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Xianpeng Huang
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Yiqing Tao
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Shouyong Chen
- Department of Orthopedics Surgery, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang, People's Republic of China
| | - Deting Xue
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Jianming Hua
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China
| | - Chengzhen Liang
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Qixin Chen
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Fangcai Li
- Department of Orthopedics Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, People's Republic of China.,Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
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Liu Y, Li Y, Nan LP, Wang F, Zhou SF, Wang JC, Feng XM, Zhang L. The effect of high glucose on the biological characteristics of nucleus pulposus-derived mesenchymal stem cells. Cell Biochem Funct 2020; 38:130-140. [PMID: 31957071 DOI: 10.1002/cbf.3441] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 08/14/2019] [Accepted: 09/04/2019] [Indexed: 02/05/2023]
Abstract
Diabetes mellitus (DM) is a dependent risk factor in the progression of intervertebral disc degeneration (IVDD). High glucose supply has negative effects on nucleus pulpous (NP) cell and mesenchymal stem cell (MSC) biology. However, the effect of hyperglycaemia on the biological characterization of nucleus pulpous-derived mesenchymal stem cell (NPMSC) has not been investigated previously. Therefore, further exploration of the effects of DM-associated hyperglycaemia on NPMSC biology is important to better understand and develop endogenous repair strategies of DM patient-associated IVDD. Therefore, the cell biological characteristics were compared between NPMSC cultured in media with low glucose concentration (LG-NPMSC) and high glucose concentration (HG-NPMSC). The results demonstrated that HG-NPMSC showed significantly decreased cell proliferation, colony formation ability, migration and wound-healing capability compared with those of LG-NPMSC. HG-NPMSC also showed significantly decreased expressions of stemness genes and mRNA and protein expressions of silent information regulator protein 1 (SIRT1), SIRT6, hypoxia inducible factor-1α (HIF-1α) and glucose transporter 1 (GLUT-1), whereas increased cell apoptosis, cell senescence and caspase-3 expression. These results suggest that high glucose may decrease proliferation and stemness maintenance ability and increase apoptosis and senescence of NPMSC. SIGNIFICANCE OF THE STUDY: We found that high glucose concentration significantly decreased cell proliferation, colony formation ability, migration and wound-healing capability of nucleus pulposus-derived mesenchymal stem cells. Moreover, high glucose cultured nucleus pulposus-derived mesenchymal stem cells showed significantly decreased expression of stemness genes, related mRNA and protein, whereas increased cell apoptosis, cell senescence and expression of caspase-3. The present study indicated that better control of high concentration glucose in the early stage of diabetes mellitus should be recommended to prevent or limit intervertebral disc degeneration.
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Affiliation(s)
- Yang Liu
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu, China.,Department of Orthopedics, Dalian Medical University, Dalian, China.,Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou, China
| | - Yan Li
- Department of Internal Medicine, Dalian Medical University, Dalian, China
| | - Li-Ping Nan
- Department of Orthopedics, Dalian Medical University, Dalian, China.,Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou, China
| | - Feng Wang
- Department of Orthopedics, Dalian Medical University, Dalian, China.,Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou, China
| | - Shi-Feng Zhou
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou, China
| | - Jing-Cheng Wang
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou, China
| | - Xin-Min Feng
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou, China
| | - Liang Zhang
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou, China
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Pioglitazone Protects Compression-Mediated Apoptosis in Nucleus Pulposus Mesenchymal Stem Cells by Suppressing Oxidative Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:4764071. [PMID: 31885796 PMCID: PMC6893265 DOI: 10.1155/2019/4764071] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/19/2019] [Accepted: 08/10/2019] [Indexed: 01/28/2023]
Abstract
Excessive compression, the main cause of intervertebral disc (IVD) degeneration, affected endogenous repair of the intervertebral disc. Pioglitazone (PGZ) is the agonist of peroxisome proliferator-activated receptor γ, which has been widely used in the treatment of diabetes mellitus. The present study aim at investigating whether pioglitazone has protective effects on compression-mediated cell apoptosis in nucleus pulposus mesenchymal stem cells (NP-MSCs) and further exploring the possible underlying mechanism. Our results indicated that the isolated cells satisfied the criteria of MSC stated by the International Society for Cellular Therapy. Besides, our research revealed that pioglitazone could protect cell viability, cell proliferation of NP-MSCs and alleviated the toxic effects caused by compression. The actin stress fibers was suppressed obviously under compression, and pioglitazone alleviated the adverse outcomes. Pioglitazone exerted protective effects on compression-induced NP-MSCs apoptosis according to annexin V/PI double-staining and TUNEL assays. Pioglitazone suppressed compression-induced NP-MSCs oxidative stress, including decreasing compression-induced overproduction of reactive oxygen species (ROS) and malondialdehyde (MDA), and alleviated compression-induced mitochondrial membrane potential (MMP) decrease. Ultrastructure collapse of the mitochondria exhibited a notable improvement by pioglitazone in compression-induced NP-MSCs according to transmission electron microscopy (TEM). Furthermore, the molecular results showed that pioglitazone significantly decreased the expression of apoptosis-associated proteins, including cyto.cytochrome c, Bax, cleaved caspase-9, and cleaved caspase-3, and promoted Bcl-2 expression. These results indicated that pioglitazone alleviated compression-induced NP-MSCs apoptosis by suppressing oxidative stress and the mitochondrial apoptosis pathway, which may be a valuable candidate for the treatment of IVD degeneration.
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Injectable Hydrogel Combined with Nucleus Pulposus-Derived Mesenchymal Stem Cells for the Treatment of Degenerative Intervertebral Disc in Rats. Stem Cells Int 2019; 2019:8496025. [PMID: 31737077 PMCID: PMC6815539 DOI: 10.1155/2019/8496025] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 08/17/2019] [Indexed: 12/12/2022] Open
Abstract
Stem cell-based tissue engineering in treating intervertebral disc (IVD) degeneration is promising. An appropriate cell scaffold can maintain the viability and function of transplanted cells. Injectable hydrogel has the potential to be an appropriate cell scaffold as it can mimic the condition of the natural extracellular matrix (ECM) of nucleus pulposus (NP) and provide binding sites for cells. This study was aimed at investigating the effect of injectable hydrogel-loaded NP-derived mesenchymal stem cells (NPMSC) for the treatment of IVD degeneration (IDD) in rats. In this study, we selected injectable 3D-RGD peptide-modified polysaccharide hydrogel as a cell transplantation scaffold. In vitro, the biocompatibility, microstructure, and induced differentiation effect on NPMSC of the hydrogel were studied. In vivo, the regenerative effect of hydrogel-loaded NPMSC on degenerated NP in a rat model was evaluated. The results showed that NPMSC was biocompatible and able to induce differentiation in hydrogel in vivo. The disc height index (almost 87%) and MRI index (3313.83 ± 227.79) of the hydrogel-loaded NPMSC group were significantly higher than those of other groups at 8 weeks after injection. Histological staining and immunofluorescence showed that the hydrogel-loaded NPMSC also partly restored the structure and ECM content of degenerated NP after 8 weeks. Moreover, the hydrogel could support long-term NPMSC survival and decrease cell apoptosis rate of the rat IVD. In conclusion, injectable hydrogel-loaded NPMSC transplantation can delay the level of IDD and promote the regeneration of the degenerative IVD in the rat model.
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37
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Interaction between Mesenchymal Stem Cells and Intervertebral Disc Microenvironment: From Cell Therapy to Tissue Engineering. Stem Cells Int 2019; 2019:2376172. [PMID: 32587618 PMCID: PMC7294366 DOI: 10.1155/2019/2376172] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 07/20/2019] [Accepted: 08/19/2019] [Indexed: 12/13/2022] Open
Abstract
Low back pain (LBP) in one of the most disabling symptoms affecting nearly 80% of the population worldwide. Its primary cause seems to be intervertebral disc degeneration (IDD): a chronic and progressive process characterized by loss of viable cells and extracellular matrix (ECM) breakdown within the intervertebral disc (IVD) especially in its inner region, the nucleus pulposus (NP). Over the last decades, innovative biological treatments have been investigated in order to restore the original healthy IVD environment and achieve disc regeneration. Mesenchymal stem cells (MSCs) have been widely exploited in regenerative medicine for their capacity to be easily harvested and be able to differentiate along the osteogenic, chondrogenic, and adipogenic lineages and to secrete a wide range of trophic factors that promote tissue homeostasis along with immunomodulation and anti-inflammation. Several in vitro and preclinical studies have demonstrated that MSCs are able to acquire a NP cell-like phenotype and to synthesize structural components of the ECM as well as trophic and anti-inflammatory mediators that may support resident cell activity. However, due to its unique anatomical location and function, the IVD presents distinctive features: avascularity, hypoxia, low glucose concentration, low pH, hyperosmolarity, and mechanical loading. Such conditions establish a hostile microenvironment for both resident and exogenously administered cells, which limited the efficacy of intradiscal cell therapy in diverse investigations. This review is aimed at describing the characteristics of the healthy and degenerated IVD microenvironment and how such features influence both resident cells and MSC viability and biological activity. Furthermore, we focused on how recent research has tried to overcome the obstacles coming from the IVD microenvironment by developing innovative cell therapies and functionalized bioscaffolds.
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38
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Effects of hypoxia and ASIC3 on nucleus pulposus cells: From cell behavior to molecular mechanism. Biomed Pharmacother 2019; 117:109061. [DOI: 10.1016/j.biopha.2019.109061] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 05/31/2019] [Accepted: 05/31/2019] [Indexed: 11/17/2022] Open
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39
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Liu Y, Li Y, Huang ZN, Wang ZY, Nan LP, Wang F, Zhou SF, Wang JC, Feng XM, Zhang L. The effect of intervertebral disc degenerative change on biological characteristics of nucleus pulposus mesenchymal stem cell: an in vitro study in rats. Connect Tissue Res 2019; 60:376-388. [PMID: 31119993 DOI: 10.1080/03008207.2019.1570168] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Purpose: To evaluate the change on biological characteristics of mesenchymal stem cell (MSC) derived from normal and degenerative intervertebral disc (IVD). Methods: MSC was isolated from normal and degenerative IVD rat model. Immunophenotype detected by flow cytometric analysis, expression of stemness genes determined by reverse-transcription polymerase chain reaction (RT-PCR) and osteogenic, adipogenic and chondrogenic differentiation were compared between MSC derived from normal IVD (N-NPMSC) and degenerative IVD (D-NPMSC). The biological characteristics including cell proliferation, colony formation, apoptosis, caspase-3 activity and mRNA and protein expressions of hypoxia inducible factor-1α (HIF-1α), glucose transporter 1 (GLUT-1), vascular endothelial growth factor (VEGF), silent information regulator protein 1 (SIRT1) and silent information regulator protein 6 (SIRT6) were compared between N-NPMSC and D-NPMSC. Results: Both of N-NPMSC and D-NPMSC highly expressed CD105, CD90 and CD73, and lower expressed CD34 and CD45. There was no significant difference in cell morphology and multipotent differentiation ability between N-NPMSC and D-NPMSC. D-NPMSC showed significantly lower expressions of stemness genes, cell proliferation and colony formation ability. D-NPMSC also exhibited increased cell apoptosis rate and caspase-3 expression, and significantly lower expressions of HIF-1α, GLUT-1, VEGF, SIRT1 and SIRT6 in mRNA and protein levels compared with N-NPMSC. Conclusions: N-NPMSC showed significantly higher proliferation rate, better colony forming and stemness maintenance ability, whereas reduced cell apoptosis rate compared with D-NPMSC. HIF-1α-mediated signal pathway may be involved in the regulation of NPMSC proliferation. These findings indicated that degenerative change of IVD should be taken into account when selecting a source of NPMSC for clinical application.
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Affiliation(s)
- Yang Liu
- a Department of Orthopedics , Dalian Medical University , Dalian , Liaoning , China
| | - Yan Li
- b Department of Internal Medicine , Dalian Medical University , Dalian , Liaoning , China
| | - Ze-Nan Huang
- c Department of Orthopedics , Clinical Medical College of Yangzhou University , Yangzhou , Jiangsu , People's Republic of China
| | - Ze-Yu Wang
- c Department of Orthopedics , Clinical Medical College of Yangzhou University , Yangzhou , Jiangsu , People's Republic of China
| | - Li-Ping Nan
- a Department of Orthopedics , Dalian Medical University , Dalian , Liaoning , China
| | - Feng Wang
- a Department of Orthopedics , Dalian Medical University , Dalian , Liaoning , China
| | - Shi-Feng Zhou
- c Department of Orthopedics , Clinical Medical College of Yangzhou University , Yangzhou , Jiangsu , People's Republic of China
| | - Jing-Cheng Wang
- c Department of Orthopedics , Clinical Medical College of Yangzhou University , Yangzhou , Jiangsu , People's Republic of China
| | - Xin-Min Feng
- c Department of Orthopedics , Clinical Medical College of Yangzhou University , Yangzhou , Jiangsu , People's Republic of China
| | - Liang Zhang
- c Department of Orthopedics , Clinical Medical College of Yangzhou University , Yangzhou , Jiangsu , People's Republic of China
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40
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Clouet J, Fusellier M, Camus A, Le Visage C, Guicheux J. Intervertebral disc regeneration: From cell therapy to the development of novel bioinspired endogenous repair strategies. Adv Drug Deliv Rev 2019; 146:306-324. [PMID: 29705378 DOI: 10.1016/j.addr.2018.04.017] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 03/29/2018] [Accepted: 04/24/2018] [Indexed: 12/15/2022]
Abstract
Low back pain (LBP), frequently associated with intervertebral disc (IVD) degeneration, is a major public health concern. LBP is currently managed by pharmacological treatments and, if unsuccessful, by invasive surgical procedures, which do not counteract the degenerative process. Considering that IVD cell depletion is critical in the degenerative process, the supplementation of IVD with reparative cells, associated or not with biomaterials, has been contemplated. Recently, the discovery of reparative stem/progenitor cells in the IVD has led to increased interest in the potential of endogenous repair strategies. Recruitment of these cells by specific signals might constitute an alternative strategy to cell transplantation. Here, we review the status of cell-based therapies for treating IVD degeneration and emphasize the current concept of endogenous repair as well as future perspectives. This review also highlights the challenges of the mobilization/differentiation of reparative progenitor cells through the delivery of biologics factors to stimulate IVD regeneration.
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Affiliation(s)
- Johann Clouet
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes F-44042, France; CHU Nantes, Pharmacie Centrale, PHU 11, Nantes F-44093, France; Université de Nantes, UFR Sciences Biologiques et Pharmaceutiques, Nantes F-44035, France; Université de Nantes, UFR Odontologie, Nantes F-44042, France
| | - Marion Fusellier
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes F-44042, France; Department of Diagnostic Imaging, CRIP, National Veterinary School (ONIRIS), Nantes F-44307, France
| | - Anne Camus
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes F-44042, France; Université de Nantes, UFR Odontologie, Nantes F-44042, France
| | - Catherine Le Visage
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes F-44042, France; Université de Nantes, UFR Odontologie, Nantes F-44042, France
| | - Jérôme Guicheux
- INSERM, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, Nantes F-44042, France; Université de Nantes, UFR Odontologie, Nantes F-44042, France; CHU Nantes, PHU4 OTONN, Nantes, F-44093, France.
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41
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Xia K, Gong Z, Zhu J, Yu W, Wang Y, Wang J, Xu A, Zhou X, Tao H, Li F, Liang C. Differentiation of Pluripotent Stem Cells into Nucleus Pulposus Progenitor Cells for Intervertebral Disc Regeneration. Curr Stem Cell Res Ther 2019; 14:57-64. [PMID: 30227822 DOI: 10.2174/1574888x13666180918095121] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 08/31/2018] [Accepted: 09/11/2018] [Indexed: 02/08/2023]
Abstract
Low back pain (LBP) is one of the world's most common musculoskeletal diseases and is frequently associated with intervertebral disc degeneration (IDD). While the main cause of IDD is commonly attributed to a reduced number of nucleus pulposus (NP) cells, current treatment strategies (both surgical and more conservative) fail to replenish NP cells or reverse the pathology. Cell replacement therapies are an attractive alternative for treating IDD. However, injecting intervertebral disc (IVD) cells, chondrocytes, or mesenchymal stem cells into various animal models of IDD indicate that transplanted cells generally fail to survive and engraft into the avascular IVD niche. Whereas pluripotent stem cells (PSCs), including induced pluripotent stem cells (iPSCs) and embryonic stem cells (ESCs), hold great potential for revolutionizing regenerative medicine, current protocols for differentiating these cells into NP-like cells are inadequate. Nucleus pulposus progenitor cells (NPPCs), which are derived from the embryonic notochord, can not only survive within the harsh hypoxic environment of the IVD, but they also efficiently differentiate into NP-like cells. Here we provide an overview of the latest progress in repairing degenerated IVDs using PSCs and NPPCs. We also discuss the molecular pathways by which PSCs differentiate into NPPCs in vitro and in vivo and propose a new, in vivo IDD therapy.
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Affiliation(s)
- Kaishun Xia
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Zhe Gong
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Jian Zhu
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Wei Yu
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Yitian Wang
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Junjie Wang
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Ankai Xu
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Xiaopeng Zhou
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Huimin Tao
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Fangcai Li
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
| | - Chengzhen Liang
- Department of Orthopedics, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, No. 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, China.,Orthopedics Research Institute of Zhejiang University, No. 88, Jiefang Road, Hangzhou 310009, China
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Cheng S, Li X, Jia Z, Lin L, Ying J, Wen T, Zhao Y, Guo Z, Zhao X, Li D, Ji W, Wang D, Ruan D. The inflammatory cytokine TNF-α regulates the biological behavior of rat nucleus pulposus mesenchymal stem cells through the NF-κB signaling pathway in vitro. J Cell Biochem 2019; 120:13664-13679. [PMID: 30938863 DOI: 10.1002/jcb.28640] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 02/17/2019] [Accepted: 02/28/2019] [Indexed: 12/27/2022]
Abstract
Nucleus pulposus (NP) mesenchymal stem cells (NPMSCs) are a potential cell source for intervertebral disc (IVD) regeneration; however, little is known about their response to tumor necrosis factor-α (TNF-α), a critical inflammation factor contributing to accelerating IVD degeneration. Accordingly, the aim of this study was to investigate the regulatory effects of TNF-α at high and low concentrations on the biological behaviors of healthy rat NPMSCs, including proliferation, migration, and NP differentiation. In this study, NPMSCs were treated with different concentration of TNF-α (0-200 ng/mL). Then we used annexin V/propidium iodide flow cytometry analysis to detect the apoptosis rate of NPMSCs. Cell Counting Kit-8, Edu assay, and cell cycle test were used to examine the proliferation of NPMSCs. Migration ability of NPMSCs was detected by wound healing assay and transwell migration assay. Pellets method was used to induce NP differentiation of NPMSCs, and immunohistochemical staining, real-time polymerase chain reaction, and Western blot analysis were used to examine the NPC phenotypic genes and proteins. The cells were further treated with the nuclear factor-κB (NF-κB) pathway inhibitor Bay 11-7082 to determine the role of the NF-κB pathway in the mechanism underlying the differentiation process. Results showed that treatment with a high concentration of TNF-α (50-200 ng/mL) could induce apoptosis of NPMSCs, whereas a relatively low TNF-α concentration (0.1-10 ng/mL) promoted the proliferation and migration of NPMSCs, but inhibited their differentiation toward NP cells. Moreover, we identified that the NF-κB signaling pathway is activated during the TNF-α-inhibited differentiation of NPMSCs, and the NF-κB signal inhibitor Bay 11-7082 could partially eliminate the adverse effect of TNF-α on the differentiation of NPMSCs. Therefore, our findings provide important insight into the dynamic biological behavior reactivity of NPMSCs to TNF-α during IVD degeneration process, thus may help us understanding the underlying mechanism of IVD degeneration.
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Affiliation(s)
- Shi Cheng
- Department of Orthopedic Surgery, Navy General Hospital, Beijing, China.,The Second Clinical College, Southern Medical University, Guangzhou, China
| | - Xiaochuan Li
- Department of Orthopedic Surgery, The People's Hospital of Gaozhou, Guangdong, China
| | - Zhiwei Jia
- Department of Orthopedics, The 306th Hospital of People's Liberation Army, Beijing, China
| | - Linghan Lin
- Department of Orthopedic Surgery, Navy General Hospital, Beijing, China
| | - Jinwei Ying
- Department of Orthopedic Surgery, Navy General Hospital, Beijing, China
| | - Tianyong Wen
- Department of Orthopedic Surgery, Navy General Hospital, Beijing, China
| | - Yachao Zhao
- Department of Orthopedic Surgery, Navy General Hospital, Beijing, China
| | - Ziming Guo
- Department of Orthopedic Surgery, Navy General Hospital, Beijing, China
| | - Xiyan Zhao
- Department of Endocrinology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Dandan Li
- The Second Clinical College, Southern Medical University, Guangzhou, China
| | - Wei Ji
- Department of Orthopedic Surgery, Navy General Hospital, Beijing, China
| | - Deli Wang
- Department of Orthopedic Surgery, Peking University Shenzhen Hospital, Guangdong, China
| | - Dike Ruan
- Department of Orthopedic Surgery, Navy General Hospital, Beijing, China
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Ma K, Chen S, Li Z, Deng X, Huang D, Xiong L, Shao Z. Mechanisms of endogenous repair failure during intervertebral disc degeneration. Osteoarthritis Cartilage 2019; 27:41-48. [PMID: 30243946 DOI: 10.1016/j.joca.2018.08.021] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 08/27/2018] [Accepted: 08/30/2018] [Indexed: 02/02/2023]
Abstract
Intervertebral disc (IVD) degeneration is frequently associated with Low back pain (LBP), which can severely reduce the quality of human life and cause enormous economic loss. However, there is a lack of long-lasting and effective therapies for IVD degeneration at present. Recently, stem cell based tissue engineering techniques have provided novel and promising treatment for the repair of degenerative IVDs. Numerous studies showed that stem/progenitor cells exist naturally in IVDs and could migrate from their niche to the IVD to maintain the quantity of nucleus pulposus (NP) cells. Unfortunately, these endogenous repair processes cannot prevent IVD degeneration as effectively as expected. Therefore, theoretical basis for regeneration of the NP in situ can be obtained from studying the mechanisms of endogenous repair failure during IVD degeneration. Although there have been few researches to study the mechanism of cell death and migration of stem/progenitor cells in IVD so far, studies demonstrated that the major inducing factors (compression and hypoxia) of IVD degeneration could decrease the number of NP cells by regulating apoptosis, autophagy, and necroptosis, and the particular chemokines and their receptors played a vital role in the migration of mesenchymal stem cells (MSCs). These studies provide a clue for revealing the mechanisms of endogenous repair failure during IVD degeneration. This article reviewed the current research situation and progress of the mechanisms through which IVD stem/progenitor cells failed to repair IVD tissues during IVD degeneration. Such studies provide an innovative research direction for endogenous repair and a new potential treatment strategy for IVD degeneration.
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Affiliation(s)
- K Ma
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - S Chen
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Z Li
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - X Deng
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - D Huang
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - L Xiong
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
| | - Z Shao
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
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Intervertebral Disc-Derived Stem/Progenitor Cells as a Promising Cell Source for Intervertebral Disc Regeneration. Stem Cells Int 2018; 2018:7412304. [PMID: 30662469 PMCID: PMC6312624 DOI: 10.1155/2018/7412304] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 10/18/2018] [Accepted: 11/05/2018] [Indexed: 12/14/2022] Open
Abstract
Intervertebral disc (IVD) degeneration is considered to be the primary reason for low back pain. Despite remarkable improvements in both pharmacological and surgical management of IVD degeneration (IVDD), therapeutic effects are still unsatisfactory. It is because of the fact that these therapies are mainly focused on alleviating the symptoms rather than treating the underlying cause or restoring the structure and biomechanical function of the IVD. Accumulating evidence has revealed that the endogenous stem/progenitor cells exist in the IVD, and these cells might be a promising cell source in the regeneration of degenerated IVD. However, the biological characteristics and potential application of IVD-derived stem/progenitor cells (IVDSCs) have yet to be investigated in detail. In this review, the authors aim to perform a review to systematically discuss (1) the isolation, surface markers, classification, and biological characteristics of IVDSCs; (2) the aging- and degeneration-related changes of IVDSCs and the influences of IVD microenvironment on IVDSCs; and (3) the potential for IVDSCs to promote regeneration of degenerated IVD. The authors believe that this review exclusively address the current understanding of IVDSCs and provide a novel approach for the IVD regeneration.
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Acidic pH promotes nucleus pulposus cell senescence through activating the p38 MAPK pathway. Biosci Rep 2018; 38:BSR20181451. [PMID: 30291218 PMCID: PMC6239263 DOI: 10.1042/bsr20181451] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 09/23/2018] [Accepted: 09/27/2018] [Indexed: 01/08/2023] Open
Abstract
Background: Nucleus pulposus (NP) cell senescence is an important cellular feature within the degenerative disc. It is known that a very acidic niche exists in the degenerative disc, which participates in regulating disc cell viability and matrix metabolism. Objective: The present study was aimed to investigate the role and potential signaling transduction pathway of an acidic pH in regulating NP cell senescence. Methods: Rat NP cells were cultured in an acidic pH of 7.2 close to that in a healthy disc (Control group) or in an acidic pH of 6.2 close to that in a severe degenerative disc (Experiment group) for 10 days. Additionally, the experimental NP cells were incubated along with the inhibitor SB203580 to analyze the role of p38 MAPK pathway in this process. Results: Compared with the control NP cells, experimental NP cells showed a suppressed cell proliferation potency, an increased G0/G1 phase fraction whereas a decreased S-phase fraction and a declined telomerase activity, an up-regulated expression of senescence-related molecules (p16 and p53), and a down-regulated expression of matrix-related moleucles (aggrecan and collagen II). Further analysis showed that inhibition of the p38 MAPK pathway partly reversed effects of acidic pH of 6.2 on the experimental NP cells. Conclusion: The very acidic niche identified in a severe degenerative disc promotes NP cell senescence through regulating the p38 MAPK pathway. The present study provides a new mechanism that drives NP cell senescence during disc degeneration.
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The Differential Effects of Leukocyte-Containing and Pure Platelet-Rich Plasma on Nucleus Pulposus-Derived Mesenchymal Stem Cells: Implications for the Clinical Treatment of Intervertebral Disc Degeneration. Stem Cells Int 2018; 2018:7162084. [PMID: 30425747 PMCID: PMC6218728 DOI: 10.1155/2018/7162084] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 07/30/2018] [Accepted: 08/09/2018] [Indexed: 12/18/2022] Open
Abstract
Background Platelet-rich plasma (PRP) is a promising strategy for intervertebral disc degeneration. However, the potential harmful effects of leukocytes in PRP on nucleus pulposus-derived mesenchymal stem cells (NPMSCs) have seldom been studied. This study aimed at comparatively evaluating effects of pure platelet-rich plasma (P-PRP) and leukocyte-containing platelet-rich plasma (L-PRP) on rabbit NPMSCs in vitro. Methods NPMSCs isolated from rabbit NP tissues were treated with L-PRP or P-PRP in vitro, and then cell proliferation and expression of stem cell markers, proinflammatory cytokines (TNF-α, IL-1β), production of ECM (extracellular matrix-related protein), and NF-κB p65 protein were validated by CCK-8 assay, real-time polymerase chain reaction, enzyme-linked immunosorbent assay, immunofluorescence, and western blot respectively. Results NPMSCs differentiate into nucleus pulposus-like cells after treatment of PRPs (P-PRP and L-PRP), and NPMSCs exhibited maximum proliferation at a 10% PRP dose. L-PRP had observably higher concentration of leukocytes, TNF-α, and IL-1β than P-PRP. Furthermore, compared to P-PRP, L-PRP induced the differentiated NPMSCs to upregulate the expression of TNF-α and IL-1β, enhanced activation of the NF-κB pathway, increased the expression of MMP-1 and MMP-13, and produced less ECM in differentiated NPMSCs. Conclusions Both P-PRP and L-PRP can induce the proliferation and NP-differentiation of NPMSCs. Compared to L-PRP, P-PRP can avoid the activation of the NF-κB pathway, thus reducing the inflammatory and catabolic responses.
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Icariin Improves the Viability and Function of Cryopreserved Human Nucleus Pulposus-Derived Mesenchymal Stem Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:3459612. [PMID: 30050653 PMCID: PMC6040248 DOI: 10.1155/2018/3459612] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 05/09/2018] [Accepted: 05/22/2018] [Indexed: 12/18/2022]
Abstract
Nucleus pulposus-derived mesenchymal stem cells (NPMSCs) have shown a good prospect in the regeneration of intervertebral disc (IVD) tissues. However, fresh NPMSCs are not always readily available for basic research and clinical applications. Therefore, there is a need for an effective long-term cryopreservation method for NPMSCs. The aim of this study was to determine whether adding icariin (ICA) to the conventional cryoprotectant containing dimethyl sulfoxide (DMSO) had a better cryoprotective effect for NPMSCs. The results showed that the freezing solution containing ICA along with DMSO significantly increased the postthawed cell viability, decreased the apoptosis rate, improved cell adherence, and maintained the mitochondrial functions, as compared to the freezing solution containing DMSO alone. And the inhibition of oxidative stress and upregulation of heat shock proteins (HSPs) in the presence of ICA also confirmed the beneficial effect of ICA. Furthermore, ICA had no cytotoxicity and did not alter the characteristics of postthawed NPMSCs. In conclusion, these results suggested that the addition of ICA to the conventional freezing medium could improve the viability and function of the cryopreserved human NPMSCs and provided an optimal formulated freezing solution for human NPMSC cryopreservation.
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Brown S, Matta A, Erwin M, Roberts S, Gruber HE, Hanley EN, Little CB, Melrose J. Cell Clusters Are Indicative of Stem Cell Activity in the Degenerate Intervertebral Disc: Can Their Properties Be Manipulated to Improve Intrinsic Repair of the Disc? Stem Cells Dev 2018; 27:147-165. [DOI: 10.1089/scd.2017.0213] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Sharon Brown
- Spinal Studies and ISTM (Keele University), Robert Jones and Agnes Hunt Orthopaedic Hospital, NHS Foundation Trust, Oswestry, United Kingdom
| | - Ajay Matta
- Krembil Research Institute, Toronto, Canada
| | - Mark Erwin
- Krembil Research Institute, Toronto, Canada
| | - Sally Roberts
- Spinal Studies and ISTM (Keele University), Robert Jones and Agnes Hunt Orthopaedic Hospital, NHS Foundation Trust, Oswestry, United Kingdom
| | - Helen E. Gruber
- Department of Orthopaedic Surgery, Carolinas Medical Center, Charlotte, North Carolina
| | - Edward N. Hanley
- Department of Orthopaedic Surgery, Carolinas Medical Center, Charlotte, North Carolina
| | - Christopher B. Little
- Raymond Purves Laboratory, Institute of Bone and Joint Research, Kolling Institute of Medical Research, The Royal North Shore Hospital, St. Leonards, NSW, Australia
- Sydney Medical School, Northern, The University of Sydney. Royal North Shore Hospital, St. Leonards, Australia
| | - James Melrose
- Raymond Purves Laboratory, Institute of Bone and Joint Research, Kolling Institute of Medical Research, The Royal North Shore Hospital, St. Leonards, NSW, Australia
- Sydney Medical School, Northern, The University of Sydney. Royal North Shore Hospital, St. Leonards, Australia
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia
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Comparison of nucleus pulposus stem/progenitor cells isolated from degenerated intervertebral discs with umbilical cord derived mesenchymal stem cells. Exp Cell Res 2017; 361:324-332. [PMID: 29097182 DOI: 10.1016/j.yexcr.2017.10.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 10/27/2017] [Accepted: 10/28/2017] [Indexed: 01/07/2023]
Abstract
Mesenchymal stem-cell based therapies have been proposed as novel treatments for intervertebral disc (IVD) degeneration. The development of these treatment strategies, however, has been hindered by the incomplete understanding of the origin, biological properties of nucleus pulposus (NP) derived stem/progenitor cells and their effects on the IVD degeneration. The goal of this study is to explore the biological properties of NP stem/progenitor cells isolated from degenerated IVD (D-NPMSCs) regarding immunotype, proliferative capacity, multi-lineage differentiation abilities, and the expression of NP specific cell surface markers compared to human umbilical cord mesenchymal stem cells (UCMSCs). Our results indicate that although D-NPMSCs shared the mesenchymal stromal cells (MSCs) characteristics with UCMSCs, significant differences exist in phenotype signatures and biological capacities between D-NPMSCs and UCMSCs. D-NPMSCs expressed lower expression levels of CD29 and CD105, the phenotype markers of MSCs, and exhibited reduced proliferation capability and differentiation potentials, which might account for the distinct NP microenvironment and the poor capacity for disc regeneration. This study will lay a foundation for further understanding the mechanism of stem cell-based therapy for IVD degeneration.
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Use of Limiting Dilution Method for Isolation of Nucleus Pulposus Mesenchymal Stem/Progenitor Cells and Effects of Plating Density on Biological Characteristics and Plasticity. BIOMED RESEARCH INTERNATIONAL 2017; 2017:9765843. [PMID: 29119116 PMCID: PMC5651100 DOI: 10.1155/2017/9765843] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 04/01/2017] [Accepted: 06/08/2017] [Indexed: 12/24/2022]
Abstract
Objectives To evaluate the effects of the limiting dilution method and plating density in rat nucleus pulposus mesenchymal stem/progenitor cells (NPMSCs). Materials and Methods Nucleus pulposus tissues were isolated from 12-week-old male Sprague-Dawley rats and NPMSCs were isolated using limiting dilution method. Cells were then classified into 3 groups according to plating density. Cell morphologies were observed, and colony-forming units, migration abilities, proliferative capacities, cell cycle percentages, multilineage differentiation capacities, stem cell biomarker expression levels, and immunophenotyping were also examined in each group. Results Low density group (LD) had higher morphological homogeneity, stronger colony-forming ability, higher cell proliferation capacity, and enhanced cell migration ability relative to the other two groups (p < 0.05). Moreover, LD had more cells entering S phase, with fewer cells arrested in G0/G1 phase (p < 0.05). While all three density groups showed a multilineage differentiation potential, LD showed a higher degree of observed and semiquantified lineage specific staining (p < 0.05). Furthermore, LD displayed higher expression levels of stem cell biomarkers (Nanog, Oct4, and Sox2) and showed higher percentages of CD29+, CD44+, and CD90+ cells (p < 0.05) following flow cytometry analysis. Conclusions Limiting dilution method is suggested when isolating NPMSCs as a means of improving cell activity and plasticity.
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