Connective Tissue Research最新文献

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COL1A1 proximal promoter topology regulates its transcriptional response to transforming growth factor β. COL1A1近端启动子拓扑调节其对转化生长因子β的转录反应。
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-03-01 Epub Date: 2024-03-04 DOI: 10.1080/03008207.2024.2319051
Elena Hitraya, Svetlana Gaidarova, Sonsoles Piera-Velazquez, Sergio A Jimenez
{"title":"COL1A1 proximal promoter topology regulates its transcriptional response to transforming growth factor β.","authors":"Elena Hitraya, Svetlana Gaidarova, Sonsoles Piera-Velazquez, Sergio A Jimenez","doi":"10.1080/03008207.2024.2319051","DOIUrl":"10.1080/03008207.2024.2319051","url":null,"abstract":"<p><strong>Objective: </strong>The COL1A1 proximal promoter contains two GC-rich regions and two inverted CCAAT boxes. The transcription factors Sp1 and CBF bind to the GC sequence at -122 to -115 bp and the inverted CCAAT box at -101 to -96 bp, respectively, and stimulate COL1A1 transcriptional activity.</p><p><strong>Methods: </strong>To further define the regulatory mechanisms controlling COL1A1 expression by Sp1 and CBF, we introduced 2, 4, 6, or 8 thymidine nucleotides (T-tracts) at position -111 bp of the COL1A1 gene promoter to increase the physical distance between these two binding sites and examined <i>in vitro</i> the transcriptional activities of the resulting constructs and their response to TGF-β1.`.</p><p><strong>Results: </strong>Insertion of 2 or 4 nucleotides decreased COL1A1 promoter activity by up to 70%. Furthermore, the expected increase in COL1A1 transcription in response to TGF-β1 was abolished. Computer modeling of the modified DNA structure indicated that increasing the physical distance between the Sp1 and CBF binding sites introduces a rotational change in the DNA topology that disrupts the alignment of Sp1 and CBF binding sites and likely alters protein-protein interactions among these transcription factors or their associated co-activators.</p><p><strong>Conclusion: </strong>The topology of the COL1A1 proximal promoter is crucial in determining the transcriptional activity of the gene and its response to the stimulatory effects of TGF-β1.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"161-169"},"PeriodicalIF":2.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10994737/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140021097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
S100A12 is involved in the pathology of osteoarthritis by promoting M1 macrophage polarization via the NF-κB pathway. S100A12 通过 NF-κB 通路促进 M1 巨噬细胞极化,从而参与骨关节炎的病理过程。
IF 2.9 4区 医学
Connective Tissue Research Pub Date : 2024-03-01 Epub Date: 2024-03-16 DOI: 10.1080/03008207.2024.2310852
Yi Zhang, Zihua Li, Cheng Chen, Wang Wei, Zhendong Li, Hui Huang, Haichao Zhou, Wenbao He, Jiang Xia, Bing Li, Yunfeng Yang
{"title":"S100A12 is involved in the pathology of osteoarthritis by promoting M1 macrophage polarization via the NF-κB pathway.","authors":"Yi Zhang, Zihua Li, Cheng Chen, Wang Wei, Zhendong Li, Hui Huang, Haichao Zhou, Wenbao He, Jiang Xia, Bing Li, Yunfeng Yang","doi":"10.1080/03008207.2024.2310852","DOIUrl":"10.1080/03008207.2024.2310852","url":null,"abstract":"<p><strong>Background: </strong>Osteoarthritis (OA) is a degenerative joint disease that affects millions worldwide. Synovitis and macrophage polarization are important factors in the development of OA. However, the specific components of synovial fluid (SF) responsible for promoting macrophage polarization remain unclear.</p><p><strong>Methods: </strong>Semi-quantitative antibody arrays were used to outline the proteome of SF. Differential expression analysis and GO/KEGG were performed on the obtained data. Immunohistochemistry and ELISA were used to investigate the relationship between SF S100A12 levels and synovitis levels in clinalclinical samples. In vitro cell experiments were conducted to investigate the effect of S100A12 on macrophage polarization. Public databases were utilized to predict and construct an S100A12-centered lncRNA-miRNA-mRNA competing endogenous RNA network, which was preliminarily validated using GEO datasets.</p><p><strong>Results: </strong>The study outlines the protein profile in OA and non-OA SF. The results showed that the S100A12 level was significantly increased in OA SF and inflammatory chondrocytes. The OA synovium had more severe synovitis and higher levels of S100A12 than non-OA synovium. Exogenous S100A12 upregulated the levels of M1 markers and phosphorylated p65 and promoted p65 nuclear translocation, while pretreatment with BAY 11-7082 reversed these changes. It was also discovered that LINC00894 was upregulated in OA and significantly correlated with S100A12, potentially regulating S100A12 expression by acting as a miRNA sponge.</p><p><strong>Conclusions: </strong>This study demonstrated that S100A12 promotes M1 macrophage polarization through the NF-κB pathway, and found that LINC00894 has the potential to regulate the expression of S100A12 as a therapeutic approach.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"133-145"},"PeriodicalIF":2.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140140075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Independent and combined effects of obesity and traumatic joint injury to the structure and composition of rat knee cartilage. 肥胖和创伤性关节损伤对大鼠膝关节软骨结构和组成的独立影响和综合影响
IF 2.9 4区 医学
Connective Tissue Research Pub Date : 2024-03-01 Epub Date: 2024-03-26 DOI: 10.1080/03008207.2024.2310838
Kalle Karjalainen, Petri Tanska, Kelsey H Collins, Walter Herzog, Rami K Korhonen, Eng Kuan Moo
{"title":"Independent and combined effects of obesity and traumatic joint injury to the structure and composition of rat knee cartilage.","authors":"Kalle Karjalainen, Petri Tanska, Kelsey H Collins, Walter Herzog, Rami K Korhonen, Eng Kuan Moo","doi":"10.1080/03008207.2024.2310838","DOIUrl":"10.1080/03008207.2024.2310838","url":null,"abstract":"<p><p>Osteoarthritis (OA) is a multifactorial joint disease characterized by articular cartilage degradation. Risk factors for OA include joint trauma, obesity, and inflammation, each of which can affect joint health independently, but their interaction and the associated consequences of such interaction were largely unexplored. Here, we studied compositional and structural alterations in knee joint cartilages of Sprague-Dawley rats exposed to two OA risk factors: joint injury and diet-induced obesity. Joint injury was imposed by surgical transection of anterior cruciate ligaments (ACLx), and obesity was induced by a high fat/high sucrose diet. Depth-dependent proteoglycan (PG) content and collagen structural network of cartilage were measured from histological sections collected previously in Collins et al.. (2015). We found that ACLx primarily affected the superficial cartilages. Compositionally, ACLx led to reduced PG content in lean animals, but increased PG content in obese rats. Structurally, ACLx caused disorganization of collagenous network in both lean and obese animals through increased collagen orientation in the superficial tissues and a change in the degree of fibrous alignment. However, the cartilage degradation attributed to joint injury and obesity was not necessarily additive when the two risk factors were present simultaneously, particularly for PG content and collagen orientation in the superficial tissues. Interestingly, sham surgeries caused a through-thickness disorganization of collagen network in lean and obese animals. We conclude that the interactions of multiple OA risk factors are complex and their combined effects cannot be understood by superposition principle. Further research is required to elucidate the interactive mechanism between OA subtypes.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"117-132"},"PeriodicalIF":2.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140287144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In vitro collagen biomarkers in mechanically stimulated human tendon cells: a systematic review. 机械刺激人体肌腱细胞中的体外胶原蛋白生物标志物:系统综述。
IF 2.9 4区 医学
Connective Tissue Research Pub Date : 2024-03-01 Epub Date: 2024-02-20 DOI: 10.1080/03008207.2024.2313582
Kipling Squier, Rouhollah Mousavizadeh, Faraz Damji, Charlotte Beck, Michael Hunt, Alexander Scott
{"title":"In vitro collagen biomarkers in mechanically stimulated human tendon cells: a systematic review.","authors":"Kipling Squier, Rouhollah Mousavizadeh, Faraz Damji, Charlotte Beck, Michael Hunt, Alexander Scott","doi":"10.1080/03008207.2024.2313582","DOIUrl":"10.1080/03008207.2024.2313582","url":null,"abstract":"<p><strong>Objective: </strong>The aim of this study was to comprehensively examine and summarize the available in vitro evidence regarding the relationship between mechanical stimulation and biomarkers of collagen synthesis in human-derived tendon cells.</p><p><strong>Methods: </strong>Systematic review with narrative analyses and risk of bias assessment guided by the Health Assessment and Translation tool. The electronic databases MEDLINE (Ovid), EMBASE (Ovid), CENTRAL (Ovid) and COMPENDEX (Engineering Village) were systematically searched from inception to 3 August 2023. Inclusion criteria encompassed English language, original experimental, or quasi-experimental in vitro publications that subjected human tendon cells to mechanical stimulation, with collagen synthesis (total collagen, type I, III, V, XI, XII, and XIV) and related biomarkers (matrix metalloproteinases, transforming growth factor β, scleraxis, basic fibroblast growth factor) as outcomes.</p><p><strong>Results: </strong>Twenty-one publications were included. A pervasive definite high risk of bias was evident in all included studies. Owing to incomplete outcome reporting and heterogeneity in mechanical stimulation protocols, planned meta-analyses were unfeasible. Reviewed data suggested that human tendon cells respond to mechanical stimulation with increased synthesis of collagen (e.g., COL1A1, procollagen, total soluble collagen, etc.), scleraxis and several matrix metalloproteinases. Results also indicate that mechanical stimulation dose magnitude may influence synthesis in several biomarkers.</p><p><strong>Conclusions: </strong>A limited number of studies, unfortunately characterized by a definite high risk of bias, suggest that in vitro mechanical stimulation primarily increases type I collagen synthesis by human tendon cells. Findings from this systematic review provide researchers and clinicians with biological evidence concerning the possible beneficial influence of exercise and loading on cellular-level tendon adaptation.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"89-101"},"PeriodicalIF":2.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139905235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Role of epidural fat in the local milieu: what we know and what we don't. 硬膜外脂肪在局部环境中的作用:我们知道什么,我们不知道什么。
IF 2.9 4区 医学
Connective Tissue Research Pub Date : 2024-03-01 Epub Date: 2024-03-17 DOI: 10.1080/03008207.2024.2329871
Zhiming Liu, Yida Wang, Xuexiao Ma, Lu Zhang, Chao Wang
{"title":"Role of epidural fat in the local milieu: what we know and what we don't.","authors":"Zhiming Liu, Yida Wang, Xuexiao Ma, Lu Zhang, Chao Wang","doi":"10.1080/03008207.2024.2329871","DOIUrl":"10.1080/03008207.2024.2329871","url":null,"abstract":"<p><strong>Purpose: </strong>Traditionally, the epidural fat (EF) is known as a physical buffer for the dural sac against the force and a lubricant facilitating the relative motion of the latter on the osseous spine. Along with the development of the studies on EF, controversies still exist on vital questions, such as the underlying mechanism of the spinal epidural lipomatosis. Meanwhile, the scattered and fragmented researches hinder the global insight into the seemingly dispensable tissue.</p><p><strong>Methods: </strong>Herein, we reviewed literature on the EF and its derivatives to elucidate the dynamic change and complex function of EF in the local milieu, especially at the pathophysiological conditions. We start with an introduction to EF and the current pathogenic landscape, emphasizing the interlink between the EF and adjacent structures. We generally categorize the major pathological changes of the EF into hypertrophy, atrophy, and inflammation.</p><p><strong>Results and conclusions: </strong>It is acknowledged that not only the EF (or its cellular components) may be influenced by various endogenic/exogenic and focal/systematic stimuli, but the adjacent structures can also in turn be affected by the EF, which may be a hidden pathogenic clue for specific spinal disease. Meanwhile, the unrevealed sections, which are also the directions the future research, are proposed according to the objective result and rational inference. Further effort should be taken to reveal the underlying mechanism and develop novel therapeutic pathways for the relevant diseases.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"102-116"},"PeriodicalIF":2.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140140074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of articular cartilage degradation in response to an impact injury using µMRI. 利用 µMRI 评估关节软骨对撞击损伤的退化反应。
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-03-01 Epub Date: 2024-02-28 DOI: 10.1080/03008207.2024.2319050
Amanveer Singh, Hannah Mantebea, Farid Badar, Syeda Batool, Gabrielle Abdelmessih, Talia Sebastian, Michael Newton, Kevin Baker, Sarah Salem, Yang Xia
{"title":"Assessment of articular cartilage degradation in response to an impact injury using µMRI.","authors":"Amanveer Singh, Hannah Mantebea, Farid Badar, Syeda Batool, Gabrielle Abdelmessih, Talia Sebastian, Michael Newton, Kevin Baker, Sarah Salem, Yang Xia","doi":"10.1080/03008207.2024.2319050","DOIUrl":"10.1080/03008207.2024.2319050","url":null,"abstract":"<p><strong>Purpose: </strong>Degradation of articular cartilage (AC) due to injury to the knee joint may initiate post-traumatic osteoarthritis (PTOA). Failure to diagnose the onset of the disease at an early stage makes the cure ineffective for PTOA. This study investigated the consequences of a mechanical injury to the knee in a rabbit model using microscopic magnetic resonance imaging (µMRI) at high resolution.</p><p><strong>Materials and methods: </strong>A mechanical injury was induced to the knee joints of 12 rabbits. Cartilage blocks were extracted from the non-impacted and impacted knee joints after 2 and 14 weeks post-impact. The specimens were studied using µMRI T2 relaxation and inductively coupled plasma analysis to determine the early degradation of the articular cartilage.</p><p><strong>Results: </strong>The data established a connection between T2 relaxation time and the early progression of knee PTOA after an impact injury. T2 values were found to be higher in the impacted cartilage at both 2 and 14 weeks, in particular, T2-55° values in the impacted samples displayed a significant rise of 6.93% after 2 weeks and 20.02% after 14 weeks. Lower glycosaminoglycan measurement and higher water content in the impacted cartilage confirmed the µMRI results.</p><p><strong>Conclusions: </strong>This µMRI T2 study was able to detect cartilage damage in the impacted knees. In addition, greater degradation in the affected knees at 14 weeks than at 2 weeks indicated the progressive nature of cartilage deterioration over time. The µMRI results were in accord with the biochemical analysis, indicating the detection of early structural damage in the cartilage.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"146-160"},"PeriodicalIF":2.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10994738/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139982536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Acidosis induces significant changes to the murine supraspinatus enthesis organic matrix. 酸中毒可引起小鼠冈上肌内束有机基质的显著变化。
IF 2.9 4区 医学
Connective Tissue Research Pub Date : 2024-01-01 Epub Date: 2024-02-01 DOI: 10.1080/03008207.2023.2275044
Saparja Nag, Isabelle De Bruyker, Ashley Nelson, Mikayla Moody, Marla Fais, Alix C Deymier
{"title":"Acidosis induces significant changes to the murine supraspinatus enthesis organic matrix.","authors":"Saparja Nag, Isabelle De Bruyker, Ashley Nelson, Mikayla Moody, Marla Fais, Alix C Deymier","doi":"10.1080/03008207.2023.2275044","DOIUrl":"10.1080/03008207.2023.2275044","url":null,"abstract":"<p><p>Rotator cuff pathology is a common musculoskeletal condition that disproportionately affects older adults, as well as patients with diabetes mellitus and chronic kidney disease. It is known that increased age and kidney dysfunction have been correlated to acidotic states, which may be related to the increased incidence of rotator cuff injury. In order to investigate the potential relationship between acidosis and rotator cuff composition and mechanics, this study utilizes a 14-day murine model of metabolic acidosis and examines the effects on the supraspinatus tendon-humeral head attachment complex. The elastic matrix in the enthesis exhibited significant changes beginning at day 3 of acidosis exposure. At day 3 and day 7 timepoints, there was a decrease in collagen content seen in both mineralized and unmineralized tissue as well as a decrease in mineral:matrix ratio. There is also evidence of both mineral dissolution and reprecipitation as buffering ions continually promote pH homeostasis. Mechanical properties of the tendon-to-bone attachment were studied; however, no significant changes were elicited in this 14-day model of acidosis. These findings suggest that acidosis can result in significant changes in enthesis composition over the course of 14 days; however, enthesis mechanics may be more structurally mediated rather than affected by compositional changes.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"41-52"},"PeriodicalIF":2.9,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92153068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
piR-368 promotes odontoblastic differentiation of dental papilla cells via the Smad1/5 signaling pathway by targeting Smurf1. piR-368通过Smad1/5信号通路靶向Smurf1,促进牙乳头细胞成牙细胞分化。
IF 2.9 4区 医学
Connective Tissue Research Pub Date : 2024-01-01 Epub Date: 2024-02-01 DOI: 10.1080/03008207.2023.2281319
Xinhui Xing, Yawei She, Guohua Yuan, Guobin Yang
{"title":"piR-368 promotes odontoblastic differentiation of dental papilla cells via the Smad1/5 signaling pathway by targeting Smurf1.","authors":"Xinhui Xing, Yawei She, Guohua Yuan, Guobin Yang","doi":"10.1080/03008207.2023.2281319","DOIUrl":"10.1080/03008207.2023.2281319","url":null,"abstract":"<p><strong>Purpose: </strong>The important role of non-coding RNAs in odontoblastic differentiation of dental tissue-derived stem cells has been widely demonstrated; however, whether piRNA (a subclass of non-coding RNA) involved in the course of odontoblastic differentiation is not yet available. This study aimed to investigate the expression profile of piRNA during odontogenic differentiation of mDPCs and the potential molecular mechanism in vitro.</p><p><strong>Materials and methods: </strong>The primary mouse dental papilla cells (mDPCs) were isolated from the first molars of 1-day postnatal Kunming mice. Then, they were cultured in odontogenic medium for 9 days. The expression profile of piRNA was detected by Small RNA sequencing. RT-qPCR was used to verify the elevation of piR-368. The mRNA and protein levels of mineralization markers were examined by qRT-PCR and Western blot analysis. Alkaline phosphatase (ALP) activity and alizarin red S staining were conducted to assess the odontoblastic differentiation ability.</p><p><strong>Results: </strong>We validated piR-368 was significantly upregulated and interference with piR-368 markedly inhibited the odontogenic differentiation of mDPCs. In addition, the relationship between Smad1/5 signaling pathway and piR-368-induced odontoblastic differentiation has been discovered. Finally, we demonstrated Smurf1 as a target gene of piR-368 using dual-luciferase assays.</p><p><strong>Conclusion: </strong>This study was the first to illustrate the participation of piRNA in odontoblastic differentiation. We proved that piR-368 promoted odontoblastic differentiation of mouse dental papilla cells via the Smad1/5 signaling pathway by targeting Smurf1.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"53-62"},"PeriodicalIF":2.9,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136396692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Macrophages in the process of osseointegration around the implant and their regulatory strategies. 植入物周围骨结合过程中的巨噬细胞及其调控策略。
IF 2.9 4区 医学
Connective Tissue Research Pub Date : 2024-01-01 Epub Date: 2024-02-01 DOI: 10.1080/03008207.2023.2300455
Xin Fang, Duo Sun, Yongli Li, Xiao Han, Yulu Gan, Junjie Jiao, Mengyuan Jiang, Heyi Gong, Yuanzheng Qi, Jinghui Zhao
{"title":"Macrophages in the process of osseointegration around the implant and their regulatory strategies.","authors":"Xin Fang, Duo Sun, Yongli Li, Xiao Han, Yulu Gan, Junjie Jiao, Mengyuan Jiang, Heyi Gong, Yuanzheng Qi, Jinghui Zhao","doi":"10.1080/03008207.2023.2300455","DOIUrl":"10.1080/03008207.2023.2300455","url":null,"abstract":"<p><strong>Purpose/aim of the study: </strong>To summarize and discuss macrophage properties and their roles and mechanisms in the process of osseointegration in a comprehensive manner, and to provide theoretical support and research direction for future implant surface modification efforts.</p><p><strong>Materials and methods: </strong>Based on relevant high-quality articles, this article reviews the role of macrophages in various stages of osseointegration and methods of implant modification.</p><p><strong>Results and conclusions: </strong>Macrophages not only promote osseointegration through immunomodulation, but also secrete a variety of cytokines, which play a key role in the angiogenic and osteogenic phases of osseointegration. There is no \"good\" or \"bad\" difference between the M1 and M2 phenotypes of macrophages, but their timely presence and sequential switching play a crucial role in implant osseointegration. In the implant surface modification strategy, the induction of sequential activation of the M1 and M2 phenotypes of macrophages is a brighter prospect for implant surface modification than inducing the polarization of macrophages to the M1 or M2 phenotypes individually, which is a promising pathway to enhance the effect of osseointegration and increase the success rate of implant surgery.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"1-15"},"PeriodicalIF":2.9,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139080518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
TLR4 antagonism provides short-term but not long-term clinical benefit in a full-depth cartilage defect mouse model. TLR4拮抗作用在全深度软骨缺损小鼠模型中提供短期但非长期的临床益处。
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-01-01 Epub Date: 2024-02-01 DOI: 10.1080/03008207.2023.2269257
Ariel E Timkovich, G Aaron Holling, Maryam F Afzali, John Kisiday, Kelly S Santangelo
{"title":"TLR4 antagonism provides short-term but not long-term clinical benefit in a full-depth cartilage defect mouse model.","authors":"Ariel E Timkovich, G Aaron Holling, Maryam F Afzali, John Kisiday, Kelly S Santangelo","doi":"10.1080/03008207.2023.2269257","DOIUrl":"10.1080/03008207.2023.2269257","url":null,"abstract":"<p><strong>Purpose/aim: </strong>Cartilage injury and subsequent osteoarthritis (OA) are debilitating conditions affecting millions worldwide. As there are no cures for these ailments, novel therapies are needed to suppress disease pathogenesis. Given that joint injuries are known to produce damage-associated molecular patterns (DAMPs), our central premise is that the Toll-like receptor 4 (TLR4) pathway is a principal driver in the early response to cartilage damage and subsequent pathology. We postulate that TLR4 activation is initiated/perpetuated by DAMPs released following joint damage. Thus, antagonism of the TLR4 pathway immediately after injury may suppress the development of joint surface defects.</p><p><strong>Materials and methods: </strong>Two groups were utilized: (1) 8-week-old, male C57BL6 mice treated systemically with a known TLR4 antagonist and (2) mice injected with vehicle control. A full-depth cartilage lesion on the midline of the patellofemoral groove was created in the right knee of each mouse. The left knee was used as a sham surgery control. Gait changes were evaluated over 4 weeks using a quantitative gait analysis system. At harvest, knee joints were processed for pathologic assessment, Nanostring® transcript expression, and immunohistochemistry (IHC).</p><p><strong>Results: </strong>Short-term treatment with a TLR4 antagonist at 14-days significantly improved relevant gait parameters; improved cartilage metrics and modified Mankin scores were also seen. Additionally, mRNA expression and IHC showed reduced expression of inflammatory mediators in animals treated with the TLR4 antagonist.</p><p><strong>Conclusions: </strong>Collectively, this work demonstrates that systemic treatment with a TLR4 antagonist is protective to further cartilage damage 14-days post-injury in a murine model of induced disease.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"26-40"},"PeriodicalIF":2.8,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11271750/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71411010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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