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Zhao Y, Chen C, Zhu Z, Zhang S, Ma X, Shen X, Zhang X, Sun Q, Bi H. Hofmeister effect driven dynamic-bond cross-linked dialdehyde xylan hydrogels with rapid response and robust mechanical properties for expanding stent. Int J Biol Macromol 2024; 280:135888. [PMID: 39313053 DOI: 10.1016/j.ijbiomac.2024.135888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 09/13/2024] [Accepted: 09/19/2024] [Indexed: 09/25/2024]
Abstract
The biomedical field urgently needs for programmable stent materials with nontoxic, autonomous self-healing, injectability, and suitable mechanical strength, especially self-expanding characteristics. However, such materials are still lacking. Herein, based on gelatin and dialdehyde-functionalized xylan, we synthesized 3D-printable, autonomous, self-healing, and mechanically robust hydrogels with a reversible Schiff base crosslink network. The hydrogels exhibited excellent mechanical properties and automatic healing properties at room temperature. The solid mechanical properties originate from the Schiff base, hydrogen bonding interactions, and xylan nanoparticle reinforcement of the polymer networks. As a proof of concept, the Hofmeister effect enabled the hydrogel to contract in highly concentrated salt solutions. In contrast, the same hydrogel expanded and relaxed in dilute salt solutions (quick response within 10 s), showing ionic stimulus-response and excellent shape memory characteristics, which demonstrated that the prepared hydrogel could be used as self-expanding artificial vascular stents. In particular, good biocompatibility was confirmed by cytotoxicity and compatibility tests, and ex vivo arterial experiments further indicated the feasibility of these artificial vascular scaffolds (the expansion force reached 1.51 N). Combined with its ionic stimuli-responsive shape memory ability, the strong mechanical, self-healing, 3D-printable, and biocompatibility properties make this hydrogel a promising material for artificial stents in various biomedical applications.
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Affiliation(s)
- Yadan Zhao
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, China
| | - Chufan Chen
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, China
| | - Zuochao Zhu
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, China
| | - Simin Zhang
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, China
| | - Xiaofan Ma
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, China
| | - Xiaoping Shen
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, China
| | - Xiaochun Zhang
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, China
| | - Qingfeng Sun
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, China.
| | - Hongjie Bi
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, China.
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Huang L, Jiao Y, Xia H, Li H, Yu J, Que Y, Zeng Z, Fan C, Wang C, Yang C, Chang J. Strontium zinc silicate simultaneously alleviates osteoporosis and sarcopenia in tail-suspended rats via Piezo1-mediated Ca 2+ signaling. J Orthop Translat 2024; 48:146-155. [PMID: 39229332 PMCID: PMC11369381 DOI: 10.1016/j.jot.2024.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 07/30/2024] [Accepted: 07/31/2024] [Indexed: 09/05/2024] Open
Abstract
Background Long-term physical inactivity probably leads to a co-existence of osteoporosis and sarcopenia which result in a high risk of falls, fractures, disability and even mortality. However, universally applicable and feasible approaches are lacking in the concurrent treatment of osteoporosis and sarcopenia. In this study, we evaluated the effect of strontium zinc silicate bioceramic (SZS) extract on osteoporosis and sarcopenia and explored its underlying mechanisms. Methods Hindlimb osteoporosis and sarcopenia were established in a tail-suspended rat model. The bones were conducted μCT scanning, histological examination, and gene expression analysis, and the muscles were conducted histological examination and gene expression analysis. In vitro, the effect of SZS extract on osteoblasts was determined by alizarin red S staining, immunofluorescence and qPCR. Similarly, the effect of SZS extract on myoblasts was determined by immunofluorescence and qPCR.. At last, the role of Piezo1 and the change of intracellular calcium ion (Ca2+) were explored through blockading the Piezo1 by GsMTx4 in MC3T3-E1 and C2C12 cells, respectively. Results We found that SZS extract could concurrently and efficiently prevent bone structure deterioration, muscle atrophy and fibrosis in hind limbs of the tail-suspended rats. The in vivo study also showed that SZS extract could upregulate the mRNA expression of Piezo1, thereby maintaining the homeostasis of bones and muscles. In vitro study demonstrated that SZS extract could promote the proliferation and differentiation of MC3T3-E1 and C2C12 cells by increasing the intracellular Ca2+ in a Piezo1-dependent manner. Conclusion This study demonstrated that SZS extract could increase Piezo1-mediated intracellular Ca2+, and facilitate osteogenic differentiation of osteoblast and myogenic differentiation of myoblasts, contributing to alleviation of osteoporosis and sarcopenia in a tail-suspended rat model. The translational potential of this article The current study might provide a universally applicable and efficient strategy to treat musculoskeletal disorders based on bioactive ceramics. The verification of the role of Piezo1-modulated intracellular Ca2+ during osteogenesis and myogenesis provided a possible therapeutic target against mechanical related diseases.
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Affiliation(s)
- Lingwei Huang
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
- College of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yiren Jiao
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
| | - Hangbin Xia
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
- School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, 325027, China
| | - Huili Li
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
- School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, 325027, China
| | - Jing Yu
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
| | - Yumei Que
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
| | - Zhen Zeng
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
- College of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chen Fan
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
| | - Chen Wang
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
| | - Chen Yang
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
| | - Jiang Chang
- Joint Centre of Translational Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
- Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325000, China
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
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Tong MJ, Song MX, Liu Z, Yu W, Wang CZ, Cai CD, Zhang YK, Zhang YQ, Wang LP, Zhu ZZ, Yin XF, Yan ZQ. A Bionic Thermosensitive Sustainable Delivery System for Reversing the Progression of Osteoarthritis by Remodeling the Joint Homeostasis. Adv Healthc Mater 2024; 13:e2303792. [PMID: 38394066 DOI: 10.1002/adhm.202303792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 02/05/2024] [Indexed: 02/25/2024]
Abstract
Although the pathogenesis of osteoarthritis (OA) is unclear, inflammatory cytokines are related to its occurrence. However, few studies focused on the therapeutic strategies of regulating joint homeostasis by simultaneously remodeling the anti-inflammatory and immunomodulatory microenvironments. Fibroblast growth factor 18 (FGF18) is the only disease-modifying OA drug (DMOAD) with a potent ability and high efficiency in maintaining the phenotype of chondrocytes within cell culture models. However, its potential role in the immune microenvironment remains unknown. Besides, information on an optimal carrier, whose interface and chondral-biomimetic microenvironment mimic the native articular tissue, is still lacking, which substantially limits the clinical efficacy of FGF18. Herein, to simulate the cartilage matrix, chondroitin sulfate (ChS)-based nanoparticles (NPs) are integrated into poly(D, L-lactide)-poly(ethylene glycol)-poly(D, L-lactide) (PLEL) hydrogels to develop a bionic thermosensitive sustainable delivery system. Electrostatically self-assembled ChS and ε-poly-l-lysine (EPL) NPs are prepared for the bioencapsulation of FGF18. This bionic delivery system suppressed the inflammatory response in interleukin-1β (IL-1β)-mediated chondrocytes, promoted macrophage M2 polarization, and inhibited M1 polarization, thereby ameliorating cartilage degeneration and synovitis in OA. Thus, the ChS-based hydrogel system offers a potential strategy to regulate the chondrocyte-macrophage crosstalk, thus re-establishing the anti-inflammatory and immunomodulatory microenvironment for OA therapy.
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Affiliation(s)
- Min-Ji Tong
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Meng-Xiong Song
- Department of Orthopedic Surgery, Minhang Hospital, Fudan University, Shanghai, 201100, China
| | - Zhe Liu
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Wei Yu
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Chen-Zhong Wang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Chuan-Dong Cai
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Ying-Kai Zhang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Yue-Qi Zhang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Li-Peng Wang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Zhen-Zhong Zhu
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Xiao-Fan Yin
- Department of Orthopedic Surgery, Minhang Hospital, Fudan University, Shanghai, 201100, China
| | - Zuo-Qin Yan
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
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Hou Y, Xu X, Zhou Y, Li Q, Zhu L, Liu C, Chen S, Pang J. Versatile Bioactive Glass/Zeolitic Imidazolate Framework-8-Based Skin Scaffolds toward High-Performance Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2024; 16:8228-8237. [PMID: 38343190 DOI: 10.1021/acsami.3c14529] [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: 02/23/2024]
Abstract
Designing a novel biomaterial for wound healing is based on biocompatibility and excellent mechanical strength. In this study, bioactive glass (BG) and zeolitic imidazolate framework-8 (ZIF-8) have been incorporated into poly(ε-caprolactone)/poly(vinyl alcohol) (PCL/PVA) composite skin scaffolds via microfluidic electrospinning. Interestingly, the addition of ZIF-8 further strengthens the BG stability and demonstrates better antibacterial effects. Utilizing the slow release of Zn, Ca, and Si ions, it also significantly promotes growth factor expression and skin regeneration. In addition, it is further demonstrated by in vitro and in vivo studies that the prepared composite skin scaffolds possess excellent biocompatibility, antibacterial capabilities, and mechanical properties. The prepared BG/ZIF-8-loaded scaffold possesses high tensile strength (26 MPa) and excellent antibacterial properties (achieves 89.64 and 78.8% inhibition of E. coli and S. aureus, respectively), and cell viability increased by 51.2%. More importantly, the wound shrinkage of the BG/ZIF-8-loaded scaffold is better than that of an unloaded scaffold, and the shrinkage rates of PCL/PVA@BG/ZIF-8(1 wt %) group is 95% with 2.2 mm granulation growth thickness within 12 days. Thus, the composite skin scaffold loaded with BG/ZIF-8 prepared by microfluidic electrospinning provides a new perspective for accelerating wound healing and is a potential novel therapeutic strategy for efficient wound healing.
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Affiliation(s)
- Yongchun Hou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Xiaowei Xu
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China
| | - Yaqin Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Qing Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Liangliang Zhu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Chang Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Su Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Jie Pang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China
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Li J, Lu Z, Xu L, Wang J, Qian S, Hu Q, Ge Y. Poly(ethylenimine)-Cyclodextrin-Based Cationic Polymer Mediated HIF-1α Gene Delivery for Hindlimb Ischemia Treatment. ACS APPLIED BIO MATERIALS 2024; 7:1081-1094. [PMID: 38294873 DOI: 10.1021/acsabm.3c01020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Hindlimb ischemia is a common disease worldwide featured by the sudden decrease in limb perfusion, which usually causes a potential threat to limb viability and even amputation or death. Revascularization has been defined as the gold-standard therapy for hindlimb ischemia. Considering that vascular injury recovery requires cellular adaptation to the hypoxia, hypoxia-inducible factor 1 α (HIF-1α) is a potential gene for tissue restoration and angiogenesis. In this manuscript, effective gene delivery vector PEI-β-CD (PC) was reported for the first application in the hindlimb ischemia treatment to deliver HIF-1α plasmid in vitro and in vivo. Our in vitro finding demonstrated that PC/HIF-1α-pDNA could be successfully entered into the cells and mediated efficient gene transfection with good biocompatibility. More importantly, under hypoxic conditions, PC/HIF-1α-pDNA could up-regulate the HUEVC cell viability. In addition, the mRNA levels of VEGF, Ang-1, and PDGF were upregulated, and transcriptome results also demonstrated that the cell-related function of response to hypoxia was enhanced. The therapeutic effect of PC/HIF-1α-pDNA was further estimated in a murine acute hindlimb ischemia model, which demonstrated that intramuscular injection of PC/HIF-1α-pDNA resulted in significantly increased blood perfusion and alleviation in tissue damage, such as tissue fibrosis and inflammation. The results provide a rationale that HIF-1α-mediated gene therapy might be a practical strategy for the treatment of limb ischemia.
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Affiliation(s)
- Jingyu Li
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Zhuoting Lu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Liwang Xu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Jing Wang
- Cancer Center, Department of Ultrasound Medicine, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou 314408, China
| | - Shaojie Qian
- Center for Rehabilitation Medicine, Department of Anesthesiology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou 314408, China
| | - Qinglian Hu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yunfen Ge
- Center for Rehabilitation Medicine, Department of Anesthesiology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital), Hangzhou Medical College, Hangzhou 314408, China
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Li R, Zhu Z, Zhang B, Jiang T, Zhu C, Mei P, Jin Y, Wang R, Li Y, Guo W, Liu C, Xia L, Fang B. Manganese Enhances the Osteogenic Effect of Silicon-Hydroxyapatite Nanowires by Targeting T Lymphocyte Polarization. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2305890. [PMID: 38039434 PMCID: PMC10811488 DOI: 10.1002/advs.202305890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 10/17/2023] [Indexed: 12/03/2023]
Abstract
Biomaterials encounter considerable challenges in extensive bone defect regeneration. The amelioration of outcomes may be attainable through the orchestrated modulation of both innate and adaptive immunity. Silicon-hydroxyapatite, for instance, which solely focuses on regulating innate immunity, is inadequate for long-term bone regeneration. Herein, extra manganese (Mn)-doping is utilized for enhancing the osteogenic ability by mediating adaptive immunity. Intriguingly, Mn-doping engenders heightened recruitment of CD4+ T cells to the bone defect site, concurrently manifesting escalated T helper (Th) 2 polarization and an abatement in Th1 cell polarization. This consequential immune milieu yields a collaborative elevation of interleukin 4, secreted by Th2 cells, coupled with attenuated interferon gamma, secreted by Th1 cells. This orchestrated interplay distinctly fosters the osteogenesis of bone marrow stromal cells and effectuates consequential regeneration of the mandibular bone defect. The modulatory mechanism of Th1/Th2 balance lies primarily in the indispensable role of manganese superoxide dismutase (MnSOD) and the phosphorylation of adenosine 5'-monophosphate-activated protein kinase (AMPK). In conclusion, this study highlights the transformative potential of Mn-doping in amplifying the osteogenic efficacy of silicon-hydroxyapatite nanowires by regulating T cell-mediated adaptive immunity via the MnSOD/AMPK pathway, thereby creating an anti-inflammatory milieu favorable for bone regeneration.
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Affiliation(s)
- Ruomei Li
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Zhiyu Zhu
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Bolin Zhang
- Department of StomatologyXinHua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai Jiao Tong University1665 Kongjiang RoadShanghai200092China
| | - Ting Jiang
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Cheng Zhu
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Peng Mei
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Yu Jin
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Ruiqing Wang
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Yixin Li
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Weiming Guo
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Chengxiao Liu
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Lunguo Xia
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
| | - Bing Fang
- Department of OrthodonticsShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong University500 Quxi RoadShanghai200011China
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Gu G, Li Y, Zuo K, Xiao G. The Influence of pH Value on the Microstructure and Properties of Strontium Phosphate Chemical Conversion Coatings on Titanium. Molecules 2023; 28:6651. [PMID: 37764427 PMCID: PMC10535797 DOI: 10.3390/molecules28186651] [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: 08/06/2023] [Revised: 09/07/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Strontium (Sr) is a trace element in the human body that can promote bone formation and inhibit bone absorption. A conversion coating of strontium phosphate (Sr-P) on the surface of titanium (Ti) can improve its biological properties and has many potential applications in the fields of dentistry and orthopedics. In the present study, Sr-P coatings with SrHPO4 and Sr3(PO4)2 crystals on Ti are prepared by a phosphate chemical conversion (PCC) treatment and the effect of pH values on the properties of the Sr-P coatings is researched. The results prove that the phase composition, morphology, and corrosion resistance of the coated Ti vary according to the pH values of the PCC solution. The morphology of the conversion deposition on Ti changes from plat-like to cluster-like and then to homogeneous microcrystals as the pH value changes from 2.50 to 3.25. Only discrete SrHPO4 crystals are generated on the substrate at lower pH values, while relatively stable Sr3(PO4)2 and SrHPO4 crystals grow and subsequently form an integrated coating on the Ti as the pH exceeds 2.50. The cross-sectional morphologies and bonding strength of different coatings are also researched. The corrosion resistance of coated Ti improves compared with that of bare Ti because of the Sr-P coatings with a Sr3(PO4)2 phase. In addition, it is indicated that the Sr-P coatings on Ti can improve the adhesion and differentiation of BMSCs.
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Affiliation(s)
- Guochao Gu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China; (G.G.); (Y.L.); (K.Z.)
- School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Yibo Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China; (G.G.); (Y.L.); (K.Z.)
- School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Kangqing Zuo
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China; (G.G.); (Y.L.); (K.Z.)
- School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Guiyong Xiao
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China; (G.G.); (Y.L.); (K.Z.)
- School of Materials Science and Engineering, Shandong University, Jinan 250061, China
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Guo L, Pei H, Yang Y, Kong Y. Betulinic acid regulates tumor-associated macrophage M2 polarization and plays a role in inhibiting the liver cancer progression. Int Immunopharmacol 2023; 122:110614. [PMID: 37423159 DOI: 10.1016/j.intimp.2023.110614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/11/2023]
Abstract
OBJECTIVE To investigate the regulatory role and mechanism of betulinic acid (BET) in tumor-associated M2 macrophage polarization. METHODS For in vitro experiments, RAW246.7 and J774A.1 cells were used, and differentiation of M2 macrophages was induced using recombinant interleukin-4/13. The levels of M2 cell marker cytokines were measured, and the proportion of F4/80+CD206+ cells was evaluated using flow cytometry. Furthermore, STAT6 signaling was detected, and H22 and RAW246.7 cells were cocultured to assess the effect of BET on M2 macrophage polarization. Changes in the malignant behavior of H22 cells after coculturing were observed and a tumor-bearing mouse model was constructed to determine CD206 cell infiltration after BET intervention. RESULTS In vitro experiments showed that BET inhibited M2 macrophage polarization and phospho-STAT6 signal modification. Moreover, the ability to promote the malignant behavior of H22 cells was reduced in BET-treated M2 macrophages. Furthermore, in vivo experiments indicated that BET decreased M2 macrophage polarization and infiltration in the microenvironment of liver cancer. BET was noted to predominantly bind to the STAT6 site to inhibit STAT6 phosphorylation. CONCLUSION BET bound chiefly to STAT6 to inhibit STAT6 phosphorylation and decrease M2 polarization in the microenvironment of liver cancer. These findings suggest that BET exerts an antitumor effect by modulating M2 macrophage function.
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Affiliation(s)
- Li Guo
- Department of Center Laboratory, The Second Affiliated Hospital of Jiaxing University, China.
| | - Hongyan Pei
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China.
| | - Yi Yang
- Department of Pharmacy, The Second Affiliated Hospital of Jiaxing University, China.
| | - Yun Kong
- Department of Pharmacy, The Second Affiliated Hospital of Jiaxing University, China.
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