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Yamashiro T, Kushibiki T, Mayumi Y, Tsuchiya M, Ishihara M, Azuma R. Negative-Pressure Wound Therapy: What We Know and What We Need to Know. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1436:131-152. [PMID: 36922487 DOI: 10.1007/5584_2023_773] [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: 03/17/2023]
Abstract
Negative-pressure wound therapy (NPWT) promotes wound healing by applying negative pressure to the wound surface. A quarter of a century after its introduction, NPWT has been used in various clinical conditions, although molecular biological evidence is insufficient due to delay in basic research. Here, we have summarized the history of NPWT, its mechanism of action, what is currently known about it, and what is expected to be known in the future. Particularly, attention has shifted from the four main mechanisms of NPWT to the accompanying secondary effects, such as effects on various cells, bacteria, and surgical wounds. This chapter will help the reader to understand the current status and shortcomings of NPWT-related research, which could aid in the development of basic research and, eventually, clinical use with stronger scientific evidence.
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Affiliation(s)
- Toshifumi Yamashiro
- Department of Plastic and Reconstructive Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Toshihiro Kushibiki
- Department of Medical Engineering, National Defense Medical College, Tokorozawa, Saitama, Japan.
| | - Yoshine Mayumi
- Department of Medical Engineering, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Masato Tsuchiya
- Department of Plastic and Reconstructive Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Miya Ishihara
- Department of Medical Engineering, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Ryuichi Azuma
- Department of Plastic and Reconstructive Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan
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Huang XH, Zheng LQ, Dai YX, Hu SN, Ning WC, Li SM, Fan YG, Lin ZL, Huang SH. Combined computational analysis and cytology show limited depth osteogenic effect on bone defects in negative pressure wound therapy. Front Bioeng Biotechnol 2023; 11:1056707. [PMID: 36873351 PMCID: PMC9978480 DOI: 10.3389/fbioe.2023.1056707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 02/09/2023] [Indexed: 02/18/2023] Open
Abstract
Background: The treatment of bone defects remains a clinical challenge. The effect of negative pressure wound therapy (NPWT) on osteogenesis in bone defects has been recognized; however, bone marrow fluid dynamics under negative pressure (NP) remain unknown. In this study, we aimed to examine the marrow fluid mechanics within trabeculae by computational fluid dynamics (CFD), and to verify osteogenic gene expression, osteogenic differentiation to investigate the osteogenic depth under NP. Methods: The human femoral head is scanned using micro-CT to segment the volume of interest (VOI) trabeculae. The VOI trabeculae CFD model simulating the bone marrow cavity is developed by combining the Hypermesh and ANSYS software. The effect of trabecular anisotropy is investigated, and bone regeneration effects are simulated under NP scales of -80, -120, -160, and -200 mmHg. The working distance (WD) is proposed to describe the suction depth of the NP. Finally, gene sequence analysis, cytological experiments including bone mesenchymal stem cells (BMSCs) proliferation and osteogenic differentiation are conducted after the BMSCs are cultured under the same NP scale. Results: The pressure, shear stress on trabeculae, and marrow fluid velocity decrease exponentially with an increase in WD. The hydromechanics of fluid at any WD inside the marrow cavity can be theoretically quantified. The NP scale significantly affects the fluid properties, especially those fluid close to the NP source; however, the effect of the NP scale become marginal as WD deepens. Anisotropy of trabecular structure coupled with the anisotropic hydrodynamic behavior of bone marrow; An NP of -120 mmHg demonstrates the majority of bone formation-related genes, as well as the most effective proliferation and osteogenic differentiation of BMSCs compared to the other NP scales. Conclusion: An NP of -120 mmHg may have the optimal activated ability to promote osteogenesis, but the effective WD may be limited to a certain depth. These findings help improve the understanding of fluid mechanisms behind NPWT in treating bone defects.
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Affiliation(s)
- Xiu-Hong Huang
- School of Stomatology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Li-Qin Zheng
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yue-Xing Dai
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shao-Nan Hu
- School of Stomatology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Wan-Chen Ning
- School of Stomatology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Si-Min Li
- School of Stomatology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Yue-Guang Fan
- Department of Joint Surgery, First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zi-Ling Lin
- Department of Orthopedic Trauma, First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shao-Hong Huang
- School of Stomatology, Stomatological Hospital, Southern Medical University, Guangzhou, China
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Zhang S, Xie Y, Yan F, Zhang Y, Yang Z, Chen Z, Zhao Y, Huang Z, Cai L, Deng Z. Negative pressure wound therapy improves bone regeneration by promoting osteogenic differentiation via the AMPK-ULK1-autophagy axis. Autophagy 2022; 18:2229-2245. [PMID: 34964701 PMCID: PMC9466622 DOI: 10.1080/15548627.2021.2016231] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Deficient bone regeneration causes bone defects or nonunion in a substantial proportion of trauma patients that urges for novel therapies. To develop a reliable therapy, we investigated the effect of negative pressure wound therapy (NPWT) on bone regeneration in vivo in a rat calvarial defect model. Negative pressure (NP) treatment in vitro was mimicked to test its effect on osteoblast differentiation in rat mesenchymal stem cells (MSCs) and MC3T3-E1 cells. Transcriptomic analyses, pharmaceutical interventions, and shRNA knockdowns were conducted to explore the underlying mechanism and their clinical relevance was investigated in samples from patients with nonunion. The potential application of a combined therapy of MSCs in hydrogels with negative pressure was tested in the rat critical-size calvarial defect model. We found that NPWT promoted bone regeneration in vivo and NP treatment induced osteoblast differentiation in vitro. NP induced osteogenesis via activating macroautophagy/autophagy by AMPK-ULK1 signaling that was impaired in clinical samples from patients with nonunion. More importantly, the combined therapy involving MSCs in hydrogels with negative pressure significantly improved bone regeneration in rat critical-size calvarial defect model. Thus, our study identifies a novel AMPK-ULK1-autophagy axis by which negative pressure promotes osteoblast differentiation of MSCs and bone regeneration. NPWT treatment can potentially be adopted for therapy of bone defects.Abbreviations: ADP, adenosine diphosphate; AICAR/Aic, acadesine; ALP, alkaline phosphatase; ALPL, alkaline phosphatase, biomineralization associated; AMP, adenosine monophosphate; AMPK, AMP-activated protein kinase; ARS, alizarin red S staining; ATG7, autophagy related 7; ATP, adenosine triphosphate; BA1, bafilomycin A1; BGLAP/OCN, bone gamma-carboxyglutamate protein; BL, BL-918; BS, bone surface; BS/TV, bone surface per tissue volume; BV/TV, bone volume per tissue volume; C.C, compound C; CCN1, cellular communication network factor 1; COL1A1, collagen type I alpha 1 chain; COL4A3, collagen type IV alpha 3 chain; COL4A4, collagen type IV alpha 4 chain; COL18A1, collagen type XVIII alpha 1 chain; CQ, chloroquine; GelMA, gelatin methacryloyl hydrogel; GO, Gene Ontology; GSEA, gene set enrichment analysis; HIF1A, hypoxia inducible factor 1 subunit alpha; HPLC, high-performance liquid chromatography; ITGAM/CD11B, integrin subunit alpha M; ITGAX/CD11C, integrin subunit alpha X; ITGB1/CdD9, integrin subunit beta 1; KEGG, Kyoto Encyclopedia of Genes and Genomes; MAP1LC3B/LC3B, microtubule associated protein 1 light chain 3 beta; micro-CT, microcomputed tomography; MSCs, mesenchymal stem cells; MTOR, mechanistic target of rapamycin kinase; NP, negative pressure; NPWT, negative pressure wound therapy; PRKAA1/AMPKα1, protein kinase AMP-activated catalytic subunit alpha 1; PRKAA2, protein kinase AMP-activated catalytic subunit alpha 2; PTPRC/CD45, protein tyrosine phosphatase receptor type C; ROS, reactive oxygen species; RUNX2, RUNX family transcription factor 2; SBI, SBI-0206965; SPP1/OPN, secreted phosphoprotein 1; THY1/CD90, Thy-1 cell surface antigen; SQSTM1, sequestosome 1; TGFB3, transforming growth factor beta 3; ULK1/Atg1, unc-51 like autophagy activating kinase 1.
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Affiliation(s)
- Sheng Zhang
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
| | - Yuanlong Xie
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
| | - Feifei Yan
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
| | - Yufeng Zhang
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
| | - Zhiqiang Yang
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
| | - Zhe Chen
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
| | - Yong Zhao
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
| | - Zan Huang
- Department of Biochemistry in College of Life Sciences, Key Laboratory of Cell Hemostasis of Hubei Province, Wuhan University, Wuhan, Hubei, People’s Republic of China,Nhc Key Laboratory of Medical Embryogenesis and Developmental Molecular Biology, Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai Children’s Hospital, Shanghai, People’s Republic of China,CONTACT Zan Huang College of Life Sciences, Key Laboratory of Cell Hemostasis of Hubei Province, Wuhan University, No. 299 Bayi Road, Wuhan, Hubei430072, People’s Republic of China
| | - Lin Cai
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China,Lin Cai Department of Orthopedics, Zhongnan Hospital of Wuhan University, No. 163 Donghu Road, Wuhan, Hubei430071, People’s Republic of China
| | - Zhouming Deng
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China,Zhouming Deng Department of Orthopedics, Zhongnan Hospital of Wuhan University, No. 163 Donghu Road, Wuhan, Hubei430071, People’s Republic of China
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Li Q, Wang Z, Wang C, Wang HL. Characterizing the respiratory-induced mechanical stimulation at the maxillary sinus floor following sinus augmentation by computational fluid dynamics. Front Bioeng Biotechnol 2022; 10:885130. [PMID: 35957638 PMCID: PMC9360545 DOI: 10.3389/fbioe.2022.885130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 06/28/2022] [Indexed: 11/14/2022] Open
Abstract
Background: The relationship between maxillary sinus pneumatization and respiratory-induced fluid mechanics remains unclear. The purpose of this study was to simulate and measure the respiratory-induced mechanical stimulation at the sinus floor under different respiratory conditions and to investigate its potential effect on the elevated sinus following sinus-lifting procedures. Methods: The nasal airway together with the bilateral maxillary sinuses of the selected patient was segmented and digitally modeled from a computed tomographic image. The sinus floors of the models were elevated by simulated sinus augmentations using computer-aided design. The numerical simulations of sinus fluid motion under different respiratory conditions were performed using a computational fluid dynamics (CFD) algorithm. Sinus wall shear stress and static pressure on the pre-surgical and altered sinus floors were examined and quantitatively compared. Results: Streamlines with minimum airflow velocity were visualized in the sinus. The sinus floor pressure and the wall shear stress increased with the elevated inlet flow rate, but the magnitude of these mechanical stimulations remained at a negligible level. The surgical technique and elevated height had no significant influence on the wall pressure and the fluid mechanics. Conclusion: This study shows that respiratory-induced mechanical stimulation in the sinus floor is negligible before and after sinus augmentation.
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Affiliation(s)
- Qing Li
- Center of Digital Dentistry, Second Clinical Division, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Zhongyu Wang
- Center of Digital Dentistry, Second Clinical Division, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Chao Wang
- Key Laboratory of Biomechanics and Mechanobiology, Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, School of Engineering Medicine, Beihang University, Beijing, China
- *Correspondence: Chao Wang, ; Hom-Lay Wang,
| | - Hom-Lay Wang
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, United States
- *Correspondence: Chao Wang, ; Hom-Lay Wang,
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Lin Y, Cheng T, Zhu S, Gu M, Jin L, Yang Y. mRNA and long non-coding RNA expression profiling of human periodontal ligament cells under tension loading. Eur J Orthod 2021; 43:698-707. [PMID: 34195798 PMCID: PMC8643418 DOI: 10.1093/ejo/cjab043] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Objective This study explored the expression profiles of messenger RNAs (mRNAs) and long non-coding RNAs (lncRNAs) in human periodontal ligament (PDL) cells subjected to tensile loading. Methods PDL cells were isolated from the teeth of five healthy individuals, cultured and then exposed to tensile loading. RNA sequencing was performed to explore the mRNA and lncRNA expression profiles with or without tensile loading. Differential expression, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were conducted to reveal enriched biological functions and signal transduction pathways. Quantitative polymerase chain reaction (qPCR) was performed to validate the expression of specific mRNAs and lncRNAs associated with the enriched pathways. Results Tensile loading significantly enhanced the osteogenic potential of PDL cells. Overall, 1438 mRNAs (860 up- and 578 down-regulated) and 195 lncRNAs (107 up- and 88 down-regulated) were differentially expressed (adjusted P-value <0.05) in the tensile loading group versus the control group. GO and KEGG analyses of the differentially expressed genes indicated significant enrichment in osteogenesis-related biological processes and intracellular signal transduction pathways (e.g. the PI3K–Akt pathway), respectively. The qPCR analysis validated the expression levels of five selected mRNAs (EGFR, FGF5, VEGFA, HIF1A, and FOXO1) and three selected lncRNAs (CYTOR, MIR22HG, and SNHG3). Limitation Further studies are warranted to validate the mechanisms regulating tension-induced bone remodelling in PDL cells and potential regulation by the identified lncRNAs. Conclusion The notably altered mRNA and lncRNA expression profiles in PDL cells under tensile loading enhance our mechanistic understanding of tension-induced osteogenesis.
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Affiliation(s)
- Yifan Lin
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Tianfan Cheng
- Division of Periodontology and Implant Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Shaoyue Zhu
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Min Gu
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Lijian Jin
- Division of Periodontology and Implant Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Yanqi Yang
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
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Wang R, Thayer P, Goldstein A, Wagner WD. Interaction of material stiffness and negative pressure to enhance differentiation of bone marrow-derived stem cells and osteoblast proliferation. J Tissue Eng Regen Med 2020; 14:295-305. [PMID: 31845531 DOI: 10.1002/term.2993] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 10/31/2019] [Accepted: 11/27/2019] [Indexed: 01/03/2023]
Abstract
Negative pressure wound therapy (NPWT) results in improved wound repair and the combined use of NPWT with elastomeric materials may further stimulate and accelerate tissue repair. No firmly established treatment modalities using both NPWT and biomaterials exist for orthopedic application. The goal of this study was to investigate the response of osteoblasts and bone marrow-derived mesenchymal stem cells to negative pressure and to determine whether a newly developed elastic osteomimetic bone repair material (BRM), a blend of type I collagen, chondroitin 6-sulfate, and poly (octanediol citrate) could enhance the osteoblastic phenotype. The results indicate that proliferation and alkaline phosphatase activity of hFOB1.19 osteoblasts were significantly increased with exposure to 12 hr of negative pressure (-125 mmHg). Follow-on studies with rat and human mesenchymal stem cells confirmed that negative pressure enhanced osteoblastic maturation. In addition, a significant interaction of negative pressure and electrospun BRM resulted in increased mRNA expression of alkaline phosphatase, osteopontin, collagen1α2, and HIF1α, whereas little or no effect on these genes was observed on electrospun collagen or tissue culture plastic. Together, these results suggest that the use of this novel biomaterial, BRM, with NPWT may ultimately translate into a safe and cost-effective clinical application to accelerate bone repair.
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Affiliation(s)
- Rui Wang
- Plastic and Reconstructive Surgery, Wake Forest University School of Medicine, Winston-Salem, North Carolina.,Biomedical Engineering and Science, Virginia Tech-Wake Forest University School of Biomedical Engineering and Science, Winston-Salem, North Carolina
| | - Patrick Thayer
- Biomedical Engineering and Science, Virginia Tech-Wake Forest University School of Biomedical Engineering and Science, Winston-Salem, North Carolina
| | - Aaron Goldstein
- Biomedical Engineering and Science, Virginia Tech-Wake Forest University School of Biomedical Engineering and Science, Winston-Salem, North Carolina.,Department of Chemical Engineering, Virginia Tech, Blacksburg, Virginia
| | - William D Wagner
- Plastic and Reconstructive Surgery, Wake Forest University School of Medicine, Winston-Salem, North Carolina.,Biomedical Engineering and Science, Virginia Tech-Wake Forest University School of Biomedical Engineering and Science, Winston-Salem, North Carolina
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Zhao B, Zhang H, Xu Q, Ge Q, Li B, Peng X, Wu X. [Effects of long time different negative pressures on osteogenic differentiation of rabbit bone mesenchymal stem cells]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2017; 31:594-599. [PMID: 29798550 DOI: 10.7507/1002-1892.201701095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Objective To investigate the effects of long time different negative pressures on osteogenic diffe-rentiation of rabbit bone mesenchymal stem cells (BMSCs). Methods The rabbit BMSCs were isolated and cultured by density gradient centrifugation. Flow cytometry was used to analyze expression of surface markers. The third passage cells cultured under condition of osteogenic induction and under different negative pressure of 0 mm Hg (control group), 75 mm Hg (low negative pressure group), and 150 mm Hg (high negative pressure group) (1 mm Hg=0.133 kPa), and the negative pressure time was 30 min/h. Cell growth was observed under phase contrast microscopy, and the growth curve was drawn; alkaline phosphatase (ALP) activity was detected by ELISA after induced for 3, 7, and 14 days. The mRNA and protein expressions of collagen type I (COL-I) and osteocalcin (OC) in BMSCs were analyzed by real-time fluorescence quantitative PCR and Western blot. Results The cultured cells were identified as BMSCs by flow cytometry. The third passage BMSCs exhibited typical long shuttle and irregular shape. Cell proliferation was inhibited with the increase of negative pressure. After induced for 4 days, the cell number of high negative pressure group was significantly less than that in control group and low negative pressure group ( P<0.05), but there was no significant difference between the low negative pressure group and the control group ( P>0.05); at 5-7 days, the cell number showed significant difference between 3 groups ( P<0.05). The greater the negative pressure was, the greater the inhibition of cell proliferation was. There was no significant difference in ALP activity between groups at 3 days after induction ( P>0.05); the ALP activity showed significant difference ( P<0.05) between the high negative pressure group and the control group at 7 days after induction; and significant difference was found in the ALP activity between 3 groups at 14 days after induction ( P<0.05). The greater the negative pressure was, the higher the ALP activity was. Real-time fluorescence quantitative PCR and Western blot detection showed that the mRNA and protein expressions of COL-I and OC protein were significantly higher in low negative pressure group and high negative pressure group than control group ( P<0.05), and in the high negative pressure group than the low negative pressure group ( P<0.05). Conclusion With the increase of the negative pressure, the osteogenic differentiation ability of BMSCs increases gradually, but the cell proliferation is inhibited.
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Affiliation(s)
- Bowen Zhao
- No.1 Department of General Surgery, The First Affiliated Hospital, College of Medicine, Shihezi University, Shihezi Xinjiang, 832008, P.R.China
| | - Hongwei Zhang
- No.1 Department of General Surgery, The First Affiliated Hospital, College of Medicine, Shihezi University, Shihezi Xinjiang, 832008,
| | - Qiang Xu
- No.1 Department of General Surgery, The First Affiliated Hospital, College of Medicine, Shihezi University, Shihezi Xinjiang, 832008, P.R.China
| | - Quanhu Ge
- No.1 Department of General Surgery, The First Affiliated Hospital, College of Medicine, Shihezi University, Shihezi Xinjiang, 832008, P.R.China
| | - Bolong Li
- No.1 Department of General Surgery, The First Affiliated Hospital, College of Medicine, Shihezi University, Shihezi Xinjiang, 832008, P.R.China
| | - Xinyu Peng
- No.1 Department of General Surgery, The First Affiliated Hospital, College of Medicine, Shihezi University, Shihezi Xinjiang, 832008,
| | - Xiangwei Wu
- No.1 Department of General Surgery, The First Affiliated Hospital, College of Medicine, Shihezi University, Shihezi Xinjiang, 832008, P.R.China
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Acceleration of tendon-bone healing of anterior cruciate ligament graft using intermittent negative pressure in rabbits. J Orthop Surg Res 2017; 12:60. [PMID: 28420425 PMCID: PMC5395760 DOI: 10.1186/s13018-017-0561-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 04/03/2017] [Indexed: 12/14/2022] Open
Abstract
Background The purpose of this study was to test effects of negative pressure on tendon–bone healing after reconstruction of anterior cruciate ligament (ACL) in rabbits. Methods Hind legs of 24 New Zealand White rabbits were randomly selected as negative pressure group and the contralateral hind legs as control. Reconstruction of the ACL was done. Joints of the negative pressure side were placed with drainage tubes connecting the micro-negative pressure aspirator. Control side was placed with ordinary drainage tubes. Drainage tubes on both sides were removed at the same time 5 days after operation. After 6 weeks, joint fluid was drawn to detect the expression levels of interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α); at the same time, femur–ligament–tibia complex was obtained to determine tendon graft tension and to observe the histomorphology, blood vessels of the tendon–bone interface, and expression of vascular endothelial growth factor (VEGF). Results The maximum load breakage of tendon graft was significantly greater in the negative pressure group than in the control group (P < 0.05). Histological studies of the tendon–bone interface found that there was more new bone formation containing chondroid cells and aligned connective tissue in the negative pressure group than in the control group. Expression of VEGF was higher in the negative pressure group than in the control group (P < 0.01). Content of IL-1β and TNF-α in synovial fluid is lower in the negative pressure group than in the control group (P < 0.01). Conclusions Intermittent negative pressure plays an active role in tendon–bone healing and creeping substitution of ACL reconstruction in the rabbits.
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Wang GQ, Li TT, Li ZR, Zhang LC, Zhang LH, Han L, Tang PF. Effect of Negative Pressure on Proliferation, Virulence Factor Secretion, Biofilm Formation, and Virulence-Regulated Gene Expression of Pseudomonas aeruginosa In Vitro. BIOMED RESEARCH INTERNATIONAL 2016; 2016:7986234. [PMID: 28074188 PMCID: PMC5198154 DOI: 10.1155/2016/7986234] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 08/28/2016] [Accepted: 10/11/2016] [Indexed: 12/30/2022]
Abstract
Objective. To investigate the effect of negative pressure conditions induced by NPWT on P. aeruginosa. Methods. P. aeruginosa was cultured in a Luria-Bertani medium at negative pressure of -125 mmHg for 24 h in the experimental group and at atmospheric pressure in the control group. The diameters of the colonies of P. aeruginosa were measured after 24 h. ELISA kit, orcinol method, and elastin-Congo red assay were used to quantify the virulence factors. Biofilm formation was observed by staining with Alexa Fluor® 647 conjugate of concanavalin A (Con A). Virulence-regulated genes were determined by quantitative RT-PCR. Results. As compared with the control group, growth of P. aeruginosa was inhibited by negative pressure. The colony size under negative pressure was significantly smaller in the experimental group than that in the controls (p < 0.01). Besides, reductions in the total amount of virulence factors were observed in the negative pressure group, including exotoxin A, rhamnolipid, and elastase. RT-PCR results revealed a significant inhibition in the expression level of virulence-regulated genes. Conclusion. Negative pressure could significantly inhibit the growth of P. aeruginosa. It led to a decrease in the virulence factor secretion, biofilm formation, and a reduction in the expression level of virulence-regulated genes.
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Affiliation(s)
- Guo-Qi Wang
- Department of Orthopedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing 100853, China
| | - Tong-Tong Li
- Department of Orthopedics, Tianjin Hospital, No. 406 Jiefangnan Road, Tianjin 300211, China
| | - Zhi-Rui Li
- Department of Orthopedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing 100853, China
| | - Li-Cheng Zhang
- Department of Orthopedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing 100853, China
| | - Li-Hai Zhang
- Department of Orthopedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing 100853, China
| | - Li Han
- Center for Hospital Infection Control, Chinese PLA Institute for Disease Control and Prevention, Beijing 100071, China
| | - Pei-Fu Tang
- Department of Orthopedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing 100853, China
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Sisakhtnezhad S, Alimoradi E, Akrami H. External factors influencing mesenchymal stem cell fate in vitro. Eur J Cell Biol 2016; 96:13-33. [PMID: 27988106 DOI: 10.1016/j.ejcb.2016.11.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 11/30/2016] [Accepted: 11/30/2016] [Indexed: 12/13/2022] Open
Abstract
Mesenchymal stem cells (MSCs) have extensive potentials, which make them attractive candidates for the developmental biology, drug discovery and regenerative medicine. However, the use of MSCs is limited by their scarceness in tissues and in culture conditions. They also exhibit various degrees of potency which subsequently influencing their applications. Nowadays, questions remain about how self-renewal and differentiation of MSCs can be controlled in vitro and in vivo, how they will behave and migrate to the right place and how they modulate the immune system. Therefore, identification of factors and culture conditions to affect the fate and function of MSCs may be effective to enhance their applications in clinical situations. Studies have indicated that the fate of MSCs in culture is influenced by various external factors, including the specific cell source, donor age, plating density, passage number and plastic surface quality. Some other factors such as cell culture media and their supplementary factors, O2 concentration, mechano-/electro-stimuli and three-dimensional scaffolds are also shown to be influential. This review addresses the current state of MSC research for describing and discussing the findings about external factors that influence the fate and function of MSCs. Additionally, the new discoveries and suggestions regarding their molecular mechanisms will be explained.
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Affiliation(s)
| | - Elham Alimoradi
- Department of biology, Faculty of Science, Razi University, Kermanshah, Iran
| | - Hassan Akrami
- Department of biology, Faculty of Science, Razi University, Kermanshah, Iran
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Nie B, Yue B. Biological effects and clinical application of negative pressure wound therapy: a review. J Wound Care 2016; 25:617-626. [DOI: 10.12968/jowc.2016.25.11.617] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- B. Nie
- Associated Professor Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - B. Yue
- Associated Professor Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
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12
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Yang Y, Cheung HH, Tu J, Miu KK, Chan WY. New insights into the unfolded protein response in stem cells. Oncotarget 2016; 7:54010-54027. [PMID: 27304053 PMCID: PMC5288239 DOI: 10.18632/oncotarget.9833] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 05/29/2016] [Indexed: 12/15/2022] Open
Abstract
The unfolded protein response (UPR) is an evolutionarily conserved adaptive mechanism to increase cell survival under endoplasmic reticulum (ER) stress conditions. The UPR is critical for maintaining cell homeostasis under physiological and pathological conditions. The vital functions of the UPR in development, metabolism and immunity have been demonstrated in several cell types. UPR dysfunction activates a variety of pathologies, including cancer, inflammation, neurodegenerative disease, metabolic disease and immune disease. Stem cells with the special ability to self-renew and differentiate into various somatic cells have been demonstrated to be present in multiple tissues. These cells are involved in development, tissue renewal and certain disease processes. Although the role and regulation of the UPR in somatic cells has been widely reported, the function of the UPR in stem cells is not fully known, and the roles and functions of the UPR are dependent on the stem cell type. Therefore, in this article, the potential significances of the UPR in stem cells, including embryonic stem cells, tissue stem cells, cancer stem cells and induced pluripotent cells, are comprehensively reviewed. This review aims to provide novel insights regarding the mechanisms associated with stem cell differentiation and cancer pathology.
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Affiliation(s)
- Yanzhou Yang
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Ningxia Medical University, Yinchuan, Ningxia, P.R. China
- The Chinese University of Hong Kong–Shandong University Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, HKSAR, China
| | - Hoi Hung Cheung
- The Chinese University of Hong Kong–Shandong University Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, HKSAR, China
| | - JiaJie Tu
- The Chinese University of Hong Kong–Shandong University Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, HKSAR, China
| | - Kai Kei Miu
- The Chinese University of Hong Kong–Shandong University Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, HKSAR, China
| | - Wai Yee Chan
- The Chinese University of Hong Kong–Shandong University Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, HKSAR, China
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13
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Effect of negative pressure on growth, secretion and biofilm formation of Staphylococcus aureus. Antonie van Leeuwenhoek 2015; 108:907-17. [DOI: 10.1007/s10482-015-0545-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 07/20/2015] [Indexed: 02/07/2023]
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14
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Effects of negative pressure wound therapy on mesenchymal stem cells proliferation and osteogenic differentiation in a fibrin matrix. PLoS One 2014; 9:e107339. [PMID: 25216182 PMCID: PMC4162584 DOI: 10.1371/journal.pone.0107339] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 08/10/2014] [Indexed: 12/22/2022] Open
Abstract
Vacuum-assisted closure (VAC) negative pressure wound therapy (NPWT) has been proven to be an effective therapeutic method for the treatment of recalcitrant wounds. However, its role in bone healing remains to be unclear. Here, we investigated the effects of NPWT on rat periosteum-derived mesenchymal stem cells (P-MSCs) proliferation and osteoblastic differentiation in a 3D fibrin matrix. P-MSCs underwent primary culture for three passages before being used to construct cell clots. The fibrin clots were incubated with NPWT under continuous suction at −125 mmHg in a subatmospheric perfusion bioreactor. Clots exposed to atmospheric pressure served as the static control. Compared to the control group, cell proliferation significantly increased in NPWT group after incubation for 3 days. There was no statistical difference in apoptosis rate between two groups. The ALP activity and mineralization of P-MSCs all increased under continuous suction. The expressions of collagen type 1 and transcription factor Cbfa-1 were higher at the 1-, 3-, and 7-day timepoints and the expressions of osteocalcin and integrin β5 were higher at the 3-, and 7-day timepoints in the NPWT group. These results indicate that a short time treatment with NPWT, applied with continuous suction at −125 mmHg, can enhance cellular proliferation of P-MSCs and induce the differentiation toward an osteogenic phenotype. The mechanotransduction molecule integrin β5 was found to be highly expressed after NPWT treatment, which indicates that NPWT may play a positive role in fracture healing through enhance bone formation and decrease bone resorption.
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