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Qin W, Jiang M, Lu S, Hu Y, Gan F, Fang W, Chen D, Bo Z. Effects of external environment on promoter methylation of PIK3R5 and related pathway regulation in steroid-induced femoral head necrosis. ENVIRONMENTAL RESEARCH 2023; 238:117116. [PMID: 37709244 DOI: 10.1016/j.envres.2023.117116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/03/2023] [Accepted: 09/09/2023] [Indexed: 09/16/2023]
Abstract
BACKGROUND Steroid-induced Avascular Necrosis of the Femoral Head (SANFH) is a condition characterized by the necrosis of the femoral head caused by long-term or high-dose hormone usage. Studies have shown that the PI3K/AKT pathway plays a crucial regulatory role in the development of SANFH. The aim of this study is to determine how external environmental factors induce changes in endogenous hormone levels, how these changes lead to steroid-induced femoral head necrosis, and the interrelationship between the changes in PIK3R5 promoter methylation levels and the regulation of the associated signaling pathways. METHODS Femoral head samples underwent molecular sequencing analysis. Candidate genes were screened by differential gene analysis and functional enrichment analysis.Methylation level of candidate gene PIK3R5 was verified by methylation-specific PCR(MS-PCR). SANFH model was constructed in New Zealand white rabbits, and the model results were verified by magnetic resonance imaging (MRI) and haematoxylin-eosin (HE) staining.The expression of PIK3R5, PI3K and AKT in rabbit models and human specimens was verified by real-time fluorescence quantitative PCR(RT-qPCR) and Western Blot(WB), respectively. RESULTS Human femoral head sequencing results indicate distinct differences in the methylation level and mRNA expression of PIK3R5 in SANFH. MS-PCR results showed the methylation level of SANFH patients was significantly higher than that of the control group (P < 0.01). The RT-qPCR results showed that PIK3R5 and PI3K expression levels in the SANFH group were lower than those in the control group (P < 0.05), and the WB experiment results were consistent with the RT-qPCR results. The MRI and HE staining results showed that the rabbit model of SANFH was successfully constructed, and the results of RT-qPCR and WB were consistent with the results of human tissues. CONCLUSION During the occurrence and development of SANFH, PIK3R5 gene regulates the PI3K/AKT pathway through methylation modification, promotes the oxidative stress response of cells, and accelerates the disease process.
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Affiliation(s)
- Wentao Qin
- Department of Bone and Joint Surgery, Guangxi Medical University First Affiliated Hospital, Nanning, China
| | - Mingyang Jiang
- Department of Bone and Joint Surgery, Guangxi Medical University First Affiliated Hospital, Nanning, China
| | - Shenyi Lu
- Department of Rehabilitation, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Yang Hu
- Department of Bone and Joint Surgery, Guangxi Medical University First Affiliated Hospital, Nanning, China; Department of Sports Medicine and Joint Surgery, Nanxishan Hospital of Guangxi Zhuang Autonomous Region, Guilin, China
| | - Fu Gan
- Department of Rehabilitation, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, China
| | - Weijun Fang
- Department of Emergency, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China.
| | - Dongxu Chen
- Department of Sports Medicine and Joint Surgery, Nanxishan Hospital of Guangxi Zhuang Autonomous Region, Guilin, China.
| | - Zhandong Bo
- Department of Bone and Joint Surgery, Guangxi Medical University First Affiliated Hospital, Nanning, China.
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Kim SG. Multiple ways for the same destination: bone regeneration. Maxillofac Plast Reconstr Surg 2022; 44:9. [PMID: 35235091 PMCID: PMC8891406 DOI: 10.1186/s40902-022-00340-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 02/22/2022] [Indexed: 11/25/2022] Open
Abstract
The regeneration of the bone is a challenging topic for maxillofacial plastic and reconstructive surgeons. For successful bone regeneration, timely providing of essential components is prerequisite. They are cellular components (osteoblasts, osteoclasts, and immune cells), extracellular matrix, and inorganic components (calcium and phosphate). Any deficient component can be provided from outside as a graft. Accordingly, there are many ways for successful bone regeneration. Selection of appropriate methods in an individualized situation is important.
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Affiliation(s)
- Seong-Gon Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung, 25457, Republic of Korea.
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Ying Y, Li B, Liu C, Xiong Z, Bai W, Ma P. Shape-Memory ECM-Mimicking Heparin-Modified Nanofibrous Gelatin Scaffold for Enhanced Bone Regeneration in Sinus Augmentation. ACS Biomater Sci Eng 2021; 8:218-231. [PMID: 34961309 DOI: 10.1021/acsbiomaterials.1c01365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Biomaterials with clinical maneuverability and predictable bone regeneration are needed in the field of maxillary sinus augmentation. Herein, gelatin was chemically modified with heparin that specifically interacted with and stabilized bone morphogenetic protein-2 (BMP-2). We then introduced thermally induced phase separation to form the injectable, shape-memory, highly porous scaffold for bone regeneration in sinus augmentation. The hydrated heparin-modified nanofibrous gelatin scaffolds (NH-GS) were demonstrated with high resilience and shape-memory property, both macroscopically and microscopically, making them injectable scaffolds and expected to be applied in sinus augmentation. This novel scaffold was verified to be biocompatible and an excellent matrix to support cell attachment, proliferation, and infiltration. Further, the growth factor-loaded NH-GS showed sustained release kinetics of BMP-2 through affinity-based scaffold-growth factor interaction, compared with BMP-2 loaded gelatin sponge (GS) and nanofibrous gelatin scaffold (NF). Both in vitro and in vivo experiments demonstrated that the BMP-2-loaded NH-GS exhibited the highest osteogenesis among the other groups. Taken together, this study introduces a new regenerative strategy in maxillary sinus augmentation, which is injectable with a predefined shape and structure and promotes bone regeneration through a more sustained BMP-2 release.
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Affiliation(s)
- Yiqian Ying
- Department of Oral Implantology, Tianjin Stomatological Hospital, School of Medicine, Nankai University, Tianjin 300041, China.,Tianjin Key Laboratory of Oral and Maxillofacial Function Reconstruction, Tianjin 300041, China
| | - Beibei Li
- Department of Dental Implant Center, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, Beijing 100050, China
| | - Changying Liu
- Department of Dental Implant Center, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, Beijing 100050, China
| | - Zuochun Xiong
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Wei Bai
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Pan Ma
- Department of Dental Implant Center, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, Beijing 100050, China
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Hu S, Zhou Y, Zhao Y, Xu Y, Zhang F, Gu N, Ma J, Reynolds MA, Xia Y, Xu HH. Enhanced bone regeneration and visual monitoring via superparamagnetic iron oxide nanoparticle scaffold in rats. J Tissue Eng Regen Med 2018; 12:e2085-e2098. [DOI: 10.1002/term.2641] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 11/28/2017] [Accepted: 01/02/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Shuying Hu
- Jiangsu Key Laboratory of Oral DiseasesNanjing Medical University Nanjing P. R. China
| | - Yi Zhou
- Yixing People's Hospital Yixing P. R. China
| | - Yantao Zhao
- Beijing Engineering Research Center of Orthopaedic ImplantsFirst Affiliated Hospital of CPLA General Hospital Beijing P. R. China
| | - Yang Xu
- Affiliated Stomatology Hospital of Soochow University Suzhou P. R. China
| | - Feimin Zhang
- Jiangsu Key Laboratory of Oral DiseasesNanjing Medical University Nanjing P. R. China
| | - Ning Gu
- Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical EngineeringSoutheast University Nanjing P. R. China
- Suzhou Institute & Collaborative Innovation Center of Suzhou Nano Science and TechnologySoutheast University Suzhou P. R. China
| | - Junqing Ma
- Jiangsu Key Laboratory of Oral DiseasesNanjing Medical University Nanjing P. R. China
| | - Mark A. Reynolds
- Department of Advanced Oral Sciences & TherapeuticsUniversity of Maryland School of Dentistry Baltimore MD USA
| | - Yang Xia
- Jiangsu Key Laboratory of Oral DiseasesNanjing Medical University Nanjing P. R. China
- Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical EngineeringSoutheast University Nanjing P. R. China
- Department of Advanced Oral Sciences & TherapeuticsUniversity of Maryland School of Dentistry Baltimore MD USA
| | - Hockin H.K. Xu
- Department of Advanced Oral Sciences & TherapeuticsUniversity of Maryland School of Dentistry Baltimore MD USA
- Center for Stem Cell Biology & Regenerative MedicineUniversity of Maryland School of Medicine Baltimore MD USA
- Department of Mechanical EngineeringUniversity of Maryland Baltimore County Baltimore County MD USA
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Koshinuma S, Murakami S, Noi M, Murakami T, Mukaisho KI, Sugihara H, Yamamoto G. Comparison of the wound healing efficacy of polyglycolic acid sheets with fibrin glue and gelatin sponge dressings in a rat cranial periosteal defect model. Exp Anim 2016; 65:473-483. [PMID: 27384972 PMCID: PMC5111851 DOI: 10.1538/expanim.16-0031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 06/15/2016] [Indexed: 01/28/2023] Open
Abstract
Oral surgical procedures occasionally require removal of the periosteum due to lesions, and these raw bone surfaces are prone not only to infection but also to scar formation during secondary healing. The objective of this study was to identify successful methods for reconstruction using periosteal defect dressings. We created 1-cm2 defects in the skin and cranial periosteum of 10-week-old male Wistar rats under isoflurane anesthesia. The animals were assigned to three defect treatment groups: (1) polyglycolic acid sheets with fibrin glue dressing (PGA-FG), (2) Spongel® gelatin sponge dressing (GS), and (3) open wound (control). Postoperative wound healing was histologically evaluated at 2, 4, and 6 weeks. The moist conditions maintained by the GS and PGA-FG treatments protected the bone surface from the destructive effects of drying and infection. Complete wound healing was observed in the GS group but not for all animals in the PGA-FG and control groups. Histologically, osteoblast proliferation on bone surfaces and complete epithelialization with adnexa were observed in the GS group at 6 weeks after surgery. In contrast, PGA sheets that had not been absorbed inhibited osteoblast proliferation and delayed wound healing in the PGA-FG group. Wound surface dressings maintain a moist environment that promotes wound healing, but PGA materials may not be suitable for cases involving exposed periosteum or bone surfaces due to the observed scar formation and foreign-body reaction.
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Affiliation(s)
- Shinya Koshinuma
- Department of Oral and Maxillofacial Surgery, Shiga University of Medical Science, Seta-Tsukinowa-cho, Otsu, Shiga 520-2192, Japan
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Awasthi SK, Bajpai SK, Utiye AS, Mishra B. Gelatin/poly(aniline) composite films: Synthesis and characterization. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2016. [DOI: 10.1080/10601325.2016.1151650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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hBMP-2 and hTGF-β1 expressed in implanted BMSCs synergistically promote the repairing of segmental bone defects. J Orthop Sci 2015; 20:717-27. [PMID: 25814267 DOI: 10.1007/s00776-015-0714-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 03/05/2015] [Indexed: 02/09/2023]
Abstract
OBJECTIVE To evaluate the effects of co-expressing hBMP-2 and hTGF-β1 in BMSCs (bone marrow-derived mesenchymal stem cells) on the repairing process of radial segmental defects in rats. METHODS BMSCs were infected with a high titer recombinant adenovirus carrying hTGF-βl and/or hBMP-2 genes. Expression of exogenous genes in BMSCs was confirmed by RT-PCR and ELISA assays. In vitro effects of exogenous genes were assessed by MTT and ALP activity tests. A left radial defect model was created using 120 SD rats. Genetically modified or unmodified BMSCs were implanted with collagen sponge scaffolds into the 5-mm radial defect. The bone repair process was systematically monitored and evaluated by X-ray examinations, gross anatomic examinations, histological analyses, and biomechanical tests. RESULTS Expression of hBMP-2 and hTGF-β1 showed synergistic effects on promoting BMSC proliferation and enhancing ALP activity in vitro. Bone repair assays showed that hBMP-2 and hTGF-β1 promoted the production of chondrocytes and osteoblasts. Implanted BMSCs transfected with both hBMP-2 and hTGF-β1 led to the best bone repair outcome. CONCLUSION hBMP-2 and hTGF-β1 can synergistically improve the bone repair process. Our results suggest a potential clinical value of combining hBMP-2 and hTGF-β1 in repairing bone defects.
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Li H, Zhang FL, Shi WJ, Bai XJ, Jia SQ, Zhang CG, Ding W. Immobilization of FLAG-Tagged Recombinant Adeno-Associated Virus 2 onto Tissue Engineering Scaffolds for the Improvement of Transgene Delivery in Cell Transplants. PLoS One 2015; 10:e0129013. [PMID: 26035716 PMCID: PMC4452710 DOI: 10.1371/journal.pone.0129013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Accepted: 05/04/2015] [Indexed: 11/24/2022] Open
Abstract
The technology of virus-based genetic modification in tissue engineering has provided the opportunity to produce more flexible and versatile biomaterials for transplantation. Localizing the transgene expression with increased efficiency is critical for tissue engineering as well as a challenge for virus-based gene delivery. In this study, we tagged the VP2 protein of type 2 adeno-associated virus (AAV) with a 3×FLAG plasmid at the N-terminus and packaged a FLAG-tagged recombinant AAV2 chimeric mutant. The mutant AAVs were immobilized onto the tissue engineering scaffolds with crosslinked anti-FLAG antibodies by N-succinimidyl-3-(2-pyridyldithiol) propionate (SPDP). Cultured cells were seeded to scaffolds to form 3D transplants, and then tested for viral transduction both in vitro and in vivo. The results showed that our FLAG-tagged AAV2 exerted similar transduction efficiency compared with the wild type AAV2 when infected cultured cells. Following immobilization onto the scaffolds of PLGA or gelatin sponge with anti-FLAG antibodies, the viral mediated transgene expression was significantly improved and more localized. Our data demonstrated that the mutation of AAV capsid targeted for antibody-based immobilization could be a practical approach for more efficient and precise transgene delivery. It was also suggested that the immobilization of AAV might have attractive potentials in applications of tissue engineering involving the targeted gene manipulation in 3D tissue cultures.
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Affiliation(s)
- Hua Li
- Department of Oral and Maxillofacial-Head and Neck Oncology, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Feng-Lan Zhang
- National Institutes for Food and Drug Controls, Beijing, China
| | - Wen-Jie Shi
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
- Department of Medical Genetics, Capital Medical University, Beijing, China
| | - Xue-Jia Bai
- Department of Medical Genetics, Capital Medical University, Beijing, China
| | - Shu-Qin Jia
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Chen-Guang Zhang
- Department of Medical Genetics, Capital Medical University, Beijing, China
- * E-mail: (CGZ); (WD)
| | - Wei Ding
- Department of Medical Genetics, Capital Medical University, Beijing, China
- Beijing Institute of Brain Disorders, Beijing, China
- * E-mail: (CGZ); (WD)
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