Connective Tissue Research最新文献

筛选
英文 中文
Effects of intramuscular administration of Platelet-Rich Plasma on denervated muscle after peripheral nerve injury.
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-12-27 DOI: 10.1080/03008207.2024.2446888
Francisco Soldado, Maider López de Jesús, Maider Beitia, Imanol González-Burguera, Garazi Ocerin, Ainhoa Elejaga-Jimeno, Miquel Saumell-Esnaola, Sergio Barrondo, Jaime Oraa, Joan Sallés, Diego Delgado, Gontzal García Del Caño, Mikel Sánchez
{"title":"Effects of intramuscular administration of Platelet-Rich Plasma on denervated muscle after peripheral nerve injury.","authors":"Francisco Soldado, Maider López de Jesús, Maider Beitia, Imanol González-Burguera, Garazi Ocerin, Ainhoa Elejaga-Jimeno, Miquel Saumell-Esnaola, Sergio Barrondo, Jaime Oraa, Joan Sallés, Diego Delgado, Gontzal García Del Caño, Mikel Sánchez","doi":"10.1080/03008207.2024.2446888","DOIUrl":"10.1080/03008207.2024.2446888","url":null,"abstract":"<p><strong>Purpose: </strong>After peripheral nerve injury (PNI), prolonged denervation of the target muscle prevents adequate reinnervation even if the nerve is repaired. The aim of this work is to analyze the effect of intramuscular Platelet-Rich Plasma (PRP) in a denervated muscle due to PNI.Materials and.</p><p><strong>Methods: </strong>An irreversible PNI was generated in the common peroneal nerve of 80 Wistar rats by nerve resection. Animals were divided into groups: non-treatment (NT), saline (S) and PRP (PRP). 200 uL of saline (S group) and PRP (PRP group) were infiltrated intramuscularly into the tibialis anterior muscle on a weekly basis, from surgery to sacrifice (at 2, 4 and 7 weeks). Muscles were histologically processed for immunofluorescence and Western blotting. Effects on nicotinic acetylcholine receptor (nAChR), satellite cells (SC) and myogenin expression were analyzed. Comparisons were performed by two-way analysis of variance (ANOVA).</p><p><strong>Results: </strong>PRP had a platelet concentration 1.5-fold higher than blood, without erythrocytes and leukocytes. The PRP group had a higher percentage weight than the S and NT groups (<i>p</i> < 0.05). The levels of nAChRα1 and nAChRε subunit were lower in the PRP group relative to the NT and S (<i>p</i> < 0.05), while the nAChRγ subunit showed an increase in the PRP group (<i>p</i> < 0.05). The activation of SCs was higher in the PRP group compared to NT and S groups (<i>p</i> < 0.05).</p><p><strong>Conclusion: </strong>PRP treatment can modulate NMJ configuration as well as key myogenic regulatory factors in denervated muscle, enhancing SC activation while mitigating muscle atrophy.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"1-16"},"PeriodicalIF":2.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142892516","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
α-Ketoglutarate promotes autophagic activity under a peri-implant condition to enhance osseointegration of dental implant in rats with osteoporosis.
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-12-24 DOI: 10.1080/03008207.2024.2442675
Luyuan Chen, Qisen Li, Shengnan Ma, Bohua Wang
{"title":"α-Ketoglutarate promotes autophagic activity under a peri-implant condition to enhance osseointegration of dental implant in rats with osteoporosis.","authors":"Luyuan Chen, Qisen Li, Shengnan Ma, Bohua Wang","doi":"10.1080/03008207.2024.2442675","DOIUrl":"https://doi.org/10.1080/03008207.2024.2442675","url":null,"abstract":"<p><strong>Aim: </strong>We aimed to investigate whether α-ketoglutarate (AKG) can promote autophagic activity under a peri-implant condition to enhance the osseointegration of dental implant in rats with osteoporosis (OP).</p><p><strong>Methods: </strong>Con, Model and AKG groups were established for the random allocation of thirty rats (<i>n</i> = 10). Their bone metabolism indicators were measured. The peri-implant bone morphology was detected by toluidine blue staining, the peri-implant bone tissue healing was detected, and the implant torque was measured.</p><p><strong>Results: </strong>In comparison to the Con group, the bone metabolism indicators [bone volume/tissue volume ratio (BV/TV), trabecular number (Tb.N), and osseointegration index (OI)], bone-implant contact (BIC) rate, bone mass in the cancellous area, dislocation torque, protein and mRNA expressions of bone morphogenetic protein-2 (BMP-2), RUNX2 and Beclin1, and LC3II/LC3I ratio in bone tissues decreased significantly in the Model group, with a significant enlargement of trabecular space (Tb.Sp) (<i>p</i> < 0.05). In comparison with the Model group, the AKG group had significant increases in Tb.N, BV/TV, OI, BIC rate, bone mass in the cancellous area, dislocation torque, mRNA plus protein expressions of BMP-2, Runt-related transcription factor 2 and Beclin1, and LC3II/light chain 3I ratio in bone tissues, in addition to a significant reduction of Tb.Sp (<i>p</i> < 0.05).</p><p><strong>Conclusions: </strong>AKG may relieve the bone metabolism disorders and enhance the osteogenic differentiation and osseointegration of implants in OP rats by promoting peri-implant autophagy.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"1-9"},"PeriodicalIF":2.8,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142881633","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
Proteomic characterization of regenerated cartilage following knee joint distraction; a human case-study.
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-12-17 DOI: 10.1080/03008207.2024.2440716
Jessica S J J Steijns, Daniel Green, Laura C W Peeters, Pieter J Emans, Tim A Boymans, Roderick H Stassen, Guus G H van den Akker, Andy Cremers, Liesbeth M C Jutten, James R Anderson, Mandy J Peffers, Marjolein M J Caron, Tim J M Welting
{"title":"Proteomic characterization of regenerated cartilage following knee joint distraction; a human case-study.","authors":"Jessica S J J Steijns, Daniel Green, Laura C W Peeters, Pieter J Emans, Tim A Boymans, Roderick H Stassen, Guus G H van den Akker, Andy Cremers, Liesbeth M C Jutten, James R Anderson, Mandy J Peffers, Marjolein M J Caron, Tim J M Welting","doi":"10.1080/03008207.2024.2440716","DOIUrl":"https://doi.org/10.1080/03008207.2024.2440716","url":null,"abstract":"<p><strong>Purpose: </strong>Knee joint distraction is a surgical procedure with cartilage-regenerating properties. The composition of joint distraction-regenerated cartilage in human patients is poorly documented. In this case-study, provided a unique opportunity to biomolecularly characterize the regenerated tissue from a patient who underwent bilateral distraction and later knee replacements.</p><p><strong>Methods: </strong>Knee joint distraction was conducted using an external fixation frame and total knee arthroplasty was performed several years later. Radiographic imaging was performed to assess the status of the knee joint prior, during and after clinical interventions. Following total knee replacement, cartilage biopsies were collected and processed for tissue sectioning and histochemical staining. Tandem mass-spectrometry proteomics analysis was used to characterize and compare the proteomic composition.</p><p><strong>Results: </strong>Both knee joints showed joint-space improvement pre- and post-knee joint distraction. Regenerated cartilage was white with an irregular surface, while native (lateral) cartilage had a yellow appearance and smooth surface. Histochemical staining showed higher Safranin-O positivity in native cartilage compared to regenerated cartilage, and differences in collagen structure. Proteomic analysis did not reveal major differences in cartilage extracellular matrix protein abundance. Bioinformatic analyses revealed enrichment in ribosomal proteins (regenerated cartilage) and RNA Polymerase II Transcription Termination (native cartilage).</p><p><strong>Conclusion: </strong>Histologically, knee joint distraction-regenerated cartilage showed less glycosaminoglycans and disorganized collagen compared to native cartilage. However, mass-spectrometry has no major differences in extracellular matrix protein abundance, with proteomic clues suggesting protein translation regulation as a potential mechanism for regeneration.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"1-11"},"PeriodicalIF":2.8,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142834417","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
Age-related remodeling of the vocal fold extracellular matrix composition, structure, and biomechanics during tissue maturation.
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-12-12 DOI: 10.1080/03008207.2024.2435364
Ryan M Friedman, Arielle S Breuninger, Matthew R Aronson, Elizabeth A Brown, Neil Patel, Lin Han, Karen B Zur, Riccardo Gottardi
{"title":"Age-related remodeling of the vocal fold extracellular matrix composition, structure, and biomechanics during tissue maturation.","authors":"Ryan M Friedman, Arielle S Breuninger, Matthew R Aronson, Elizabeth A Brown, Neil Patel, Lin Han, Karen B Zur, Riccardo Gottardi","doi":"10.1080/03008207.2024.2435364","DOIUrl":"https://doi.org/10.1080/03008207.2024.2435364","url":null,"abstract":"<p><strong>Purpose: </strong>The vocal folds (VFs) are among the most mechanically active connective tissues, vibrating between 80 and 250 hz during speech. Overall VF function is determined by the composition and structure of their extracellular matrix (ECM). During tissue maturation, the VFs remodel from a monolayer of collagen fibers to a tri-layered structure, affecting tissue biomechanics. However, age-related VF ECM remodeling remains poorly understood since few studies have explored the proteins governing collagen fibrillogenesis or the non-collagenous ECM components critical for VF elasticity.</p><p><strong>Materials and methods: </strong>VFs from immature, sexually mature, and skeletally mature rats were evaluated by endoscopy, histology, and electron microscopy for cellular and biochemical composition, ECM organization, and proteoglycan distribution. Nanoindentation modulus was determined by atomic force microscopy.</p><p><strong>Results: </strong>Collagen fiber abundance, maturity, and alignment are low in immature rats but show an age-dependent increase during tissue maturation. Lumican and fibromodulin, which regulate early-stage collagen fibril formation, are distributed throughout the VFs, and their abundance decreases with age. Decorin, involved in collagen organization, is concentrated just beneath the epithelium and increases with age. Elastin levels increase during tissue maturation, but hyaluronic acid abundance and distribution remain consistent with age. VF nanoindentation modulus trends toward a decrease with age.</p><p><strong>Conclusion: </strong>This work identifies changes in VF ECM composition and organization during tissue maturation, focusing on proteins that regulate collagen fibrillogenesis, fiber assembly, and VF biomechanics. These findings may inform the development of pro-reparative therapies designed to influence collagen network structure and overall ECM dysregulation in a number of laryngeal pathologies.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"1-14"},"PeriodicalIF":2.8,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142812639","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
Tendon-targeted knockout of collagen XI disrupts patellar and Achilles tendon structure and mechanical properties during murine postnatal development.
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-12-02 DOI: 10.1080/03008207.2024.2432324
Jordan S Cohen, Ashley K Fung, Matthew K Stein, Christelle Darrieutort-Laffite, Stephanie N Weiss, Snehal S Shetye, Nat A Thurlow, Courtney A Nuss, Nathaniel A Dyment, Louis J Soslowsky
{"title":"Tendon-targeted knockout of collagen XI disrupts patellar and Achilles tendon structure and mechanical properties during murine postnatal development.","authors":"Jordan S Cohen, Ashley K Fung, Matthew K Stein, Christelle Darrieutort-Laffite, Stephanie N Weiss, Snehal S Shetye, Nat A Thurlow, Courtney A Nuss, Nathaniel A Dyment, Louis J Soslowsky","doi":"10.1080/03008207.2024.2432324","DOIUrl":"https://doi.org/10.1080/03008207.2024.2432324","url":null,"abstract":"<p><strong>Background: </strong>Collagen XI is a fibril-forming collagen typically associated with type II collagen tissues but is also expressed in type I collagen-rich tendons, especially during development. We previously showed that tendon-targeted (Scx-Cre) Col11a1 knockout mice have smaller tendons in adulthood with aberrant fibril structure and impaired mechanical properties. However, the manifestation of this phenotype is not clearly understood. Therefore, our objective is to define the spatiotemporal roles of collagen XI in tendon structure-function during postnatal development. Given the high expression of collagen XI during embryonic development, we hypothesized that collagen XI knockout leads to the deposition of weakened extracellular matrix during early postnatal timepoints, disrupting the establishment of tendon structure and function.</p><p><strong>Methods: </strong>Patellar and Achilles tendons from postnatal (P) days 0, 10, 20, and 30 tendon-targeted scleraxis-Cre heterozygous and homozygous Col11a1 knockout mice were evaluated for morphology, nuclear organization, fibril morphology, mechanical properties, and gene expression.</p><p><strong>Results: </strong>At P0, there were no differences in tendon length or fibril diameter of either tendon. By P10, striking structural and functional differences emerged, with collagen XI deficiency resulting in increased tendon length, a heterogeneous and larger diameter population of fibrils, and inferior mechanical properties in both patellar and Achilles tendons. Differences increased in magnitude through P30, supporting our hypothesis that impaired structure-function during postnatal development may drive tendon lengthening and reduced mechanical properties.</p><p><strong>Conclusions: </strong>Though collagen XI is a quantitatively minor component of the tendon extracellular matrix, these results highlight the critical role of collagen XI in the acquisition of tendon structure-function.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"1-14"},"PeriodicalIF":2.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142766963","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
Acute tear versus chronic-degenerated rotator cuff pathologies are associated with divergent tendon metabolite profiles. 急性撕裂与慢性肩袖退行性病变与不同的肌腱代谢物特征有关。
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-11-14 DOI: 10.1080/03008207.2024.2425867
Katie J Sikes, Kendra M Andrie, Sara Wist, Nikhil Verma, Adam B Yanke, Kelly S Santangelo, David D Frisbie, Brian J Cole
{"title":"Acute tear versus chronic-degenerated rotator cuff pathologies are associated with divergent tendon metabolite profiles.","authors":"Katie J Sikes, Kendra M Andrie, Sara Wist, Nikhil Verma, Adam B Yanke, Kelly S Santangelo, David D Frisbie, Brian J Cole","doi":"10.1080/03008207.2024.2425867","DOIUrl":"https://doi.org/10.1080/03008207.2024.2425867","url":null,"abstract":"<p><strong>Purpose/aim: </strong>Metabolic disorders are risk factors for rotator cuff injuries, which suggests that the rotator cuff is sensitive to local metabolic fluctuations. However, the link between the metabolic microenvironment and pathologic features of acute tear versus chronic degeneration is currently unknown. The overarching goal of this study was to evaluate alterations in tendon metabolite profiles following acute tear or chronic degeneration of the rotator cuff. We hypothesized that injury types (acute tear vs. chronic degeneration) would result in distinct metabolite profiles relative to clinically unaffected tendon controls.</p><p><strong>Materials and methods: </strong>We utilized untargeted metabolomics to identify pathways that were altered at the time of rotator cuff repair (RCR; acute tear) or reverse total shoulder arthroplasty (rTSA; chronic degeneration) relative to total shoulder arthroplasty controls (TSA; tendon clinically unaffected).</p><p><strong>Results: </strong>Acute tears to the rotator cuff were associated with an overall decrease in tendon metabolites. This global decrease was primarily associated with glycolic acid and decreased tricarboxylic acid (TCA) cycle activity. Conversely, chronic tendon specimens from patients undergoing rTSA showed an overall increase in metabolites. Most notably, chronic injury was associated with increased levels of multiple amino acids including alanine, aspartate, lysine, and proline.</p><p><strong>Conclusions: </strong>Overall, this study demonstrates that distinct metabolite profiles are associated with injury types, and that therapeutic strategies should address both cellular and matrix components regardless of injury induction. The specific pathways identified paired with validated, established, treatment methods may serve as novel therapeutic targets for patients who suffer from rotator cuff injuries.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"1-14"},"PeriodicalIF":2.8,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142616303","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
NEDD4L affects stability of the CHEK2/TP53 axis through ubiquitination modification to enhance osteogenic differentiation of periodontal ligament stem cells. NEDD4L通过泛素化修饰影响CHEK2/TP53轴的稳定性,从而增强牙周韧带干细胞的成骨分化。
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-10-07 DOI: 10.1080/03008207.2024.2406794
Wenyue Hou, Changsheng Sun, Xue Han, Mingyu Fan, Wenjuan Qiao
{"title":"NEDD4L affects stability of the CHEK2/TP53 axis through ubiquitination modification to enhance osteogenic differentiation of periodontal ligament stem cells.","authors":"Wenyue Hou, Changsheng Sun, Xue Han, Mingyu Fan, Wenjuan Qiao","doi":"10.1080/03008207.2024.2406794","DOIUrl":"https://doi.org/10.1080/03008207.2024.2406794","url":null,"abstract":"<p><strong>Background: </strong>Checkpoint kinase 2 (CHEK2) and its regulated tumor protein p53 (TP53) have been correlated with osteogenic differentiation of osteoblast-like cells. Based on bioinformatics predictions, this study aims to investigate the effect of the CHEK2/TP53 axis on osteogenic differentiation of periodontal ligament stem cells (PDLSCs) and to explore the regulatory mechanism.</p><p><strong>Methods: </strong>PDLSCs were isolated from human impacted wisdom teeth, and they were cultured in normal medium (NM) or osteogenic medium (OM). Protein levels of CHEK2 and TP53 were examined using western blot analysis. Osteogenic differentiation ability of PDLSCs was analyzed by measuring marker proteins (RUNX2, OCN, and OSX), ALP activity, and ALP staining. Molecular interaction between NEDD4 like E3 ubiquitin protein ligase (NEDD4L) and CHEK2 was examined by ubiquitination and co-immunoprecipitation assays. Gain- and loss-of function assays of NEDD4L, CHEK2, and TP53 were performed to analyze their function in osteogenic differentiation of PDLSCs. A rat model of mandibular bone defect was generated for <i>in vivo</i> validation.</p><p><strong>Results: </strong>NEDD4L was upregulated, while CHEK2 and TP53 were downregulated in PDLSCs cultured in OM. CHEK2 protected TP53 from degradation, while NEDD4L reduced CHEK2 protein level by ubiquitination modification. NEDD4L silencing reduced osteogenic differentiation ability of PDLSCs both <i>in vitro</i> and <i>in vivo</i>, which was restored by CHEK2 silencing. By contrast, CHEK2 overexpression blocked the osteogenic differentiation of PDLSCs <i>in vitro</i>.</p><p><strong>Conclusion: </strong>This study demonstrates that NEDD4L affects protein stability of the CHEK2/TP53 axis through ubiquitination modification, thus increasing osteogenic differentiation of PDLSCs.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"1-14"},"PeriodicalIF":2.8,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142380233","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
High-fat diet-induced obesity exacerbated collagenase-induced tendon injury with upregulation of interleukin-1beta and matrix metalloproteinase-1. 高脂饮食诱发的肥胖会加剧胶原酶诱发的肌腱损伤,并上调白细胞介素-1β和基质金属蛋白酶-1。
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-10-04 DOI: 10.1080/03008207.2024.2409751
Samuel Ka-Kin Ling, Zuru Liang, Pauline Po Yee Lui
{"title":"High-fat diet-induced obesity exacerbated collagenase-induced tendon injury with upregulation of interleukin-1beta and matrix metalloproteinase-1.","authors":"Samuel Ka-Kin Ling, Zuru Liang, Pauline Po Yee Lui","doi":"10.1080/03008207.2024.2409751","DOIUrl":"https://doi.org/10.1080/03008207.2024.2409751","url":null,"abstract":"<p><strong>Aims: </strong>Obesity increases tendinopathy's risk, but its mechanisms remain unclear. This study examined the effect of high-fat diet (HFD)-induced obesity on the outcomes and inflammation of collagenase-induced (CI) tendon injury.</p><p><strong>Methods: </strong>Mice were fed with standard chow (SC) or HFD for 12 weeks. Bacterial collagenase I or saline was injected over the patellar tendons of each mouse. At weeks 2 and 8 post-injection, the patellar tendons were harvested for histology, immunohistochemical staining, and gait analysis. The difference (Δ) of limb-idleness index (LII) at the time of post-injury and pre-injury states was calculated. Biomechanical test of tendons was also performed at week 8 post-injection.</p><p><strong>Results: </strong>HFD aggravated CI tendon injury with an increase in vascularity and cellularity compared to SC treatment. The histopathological score (week 2: <i>p</i> = 0.025; week 8: <i>p</i> = 0.013) and ΔLII (week 2: <i>p</i> = 0.012; week 8: <i>p</i> = 0.005) were significantly higher in the HFD group compared to those in the SC group after CI tendon injury. Stiffness (saline: <i>p</i> = 0.003; CI: <i>p</i> = 0.010), ultimate stress (saline: <i>p</i> < 0.001; CI: <i>p</i> = 0.006), and Young's modulus (saline: <i>p</i> = 0.017; CI: <i>p</i> = 0.007) were significantly lower in the HFD group compared to the SC group at week 8 after saline or collagenase injection. HFD induced higher expression of IL-1β (week 2: <i>p</i> = 0.010; week 8: <i>p</i> = 0.025) and MMP-1 (week 2: <i>p</i> = 0.010; week 8: <i>p</i> = 0.004) compared to SC treatment after CI tendon injury at both time points.</p><p><strong>Conclusions: </strong>HFD-induced obesity exacerbated histopathological, functional, and biomechanical changes in the CI tendon injury model, which was associated with an upregulation of IL-1β and MMP-1.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"1-11"},"PeriodicalIF":2.8,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142371215","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
Gait assessment in a female rat Sprague Dawley model of disc-associated low back pain. 椎间盘相关性腰痛雌性大鼠 Sprague Dawley 模型的步态评估。
IF 2.9 4区 医学
Connective Tissue Research Pub Date : 2024-09-17 DOI: 10.1080/03008207.2024.2395287
Fei San Lee,Carlos J Cruz,Kyle D Allen,Rebecca A Wachs
{"title":"Gait assessment in a female rat Sprague Dawley model of disc-associated low back pain.","authors":"Fei San Lee,Carlos J Cruz,Kyle D Allen,Rebecca A Wachs","doi":"10.1080/03008207.2024.2395287","DOIUrl":"https://doi.org/10.1080/03008207.2024.2395287","url":null,"abstract":"PURPOSEGait disturbances are common in human low back pain (LBP) patients, suggesting potential applicability to rodent LBP models. This study aims to assess the influence of disc-associated LBP on gait in female Sprague Dawley rats and explore the utility of the open-source Gait Analysis Instrumentation and Technology Optimized for Rodents (GAITOR) suite as a potential alternative tool for spontaneous pain assessment in a previously established LBP model.MATERIALS AND METHODSDisc degeneration was surgically induced using a one-level disc scrape injury method, and microcomputed tomography was used to assess disc volume loss. After disc injury, axial hypersensitivity was evaluated using the grip strength assay, and an open field test was used to detect spontaneous pain-like behavior.RESULTSResults demonstrated that injured animals exhibit a significant loss in disc volume and reduced grip strength. Open field test did not detect significant differences in distance traveled between sham and injured animals. Concurrently, animals with injured discs did not display significant gait abnormalities in stance time imbalance, temporal symmetry, spatial symmetry, step width, stride length, and duty factor compared to sham. However, comparisons with reference values of normal gait reported in prior literature reveal that injured animals exhibit mild deviations in forelimb and hindlimb stance time imbalance, forelimb temporal symmetry, and hindlimb spatial symmetry at some time points.CONCLUSIONSThis study concludes that the disc injury may have very mild effects on gait in female rats within 9 weeks post-injury and recommends future in depth dynamic gait analysis and longer studies beyond 9 weeks to potentially detect gait.","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":"37 1","pages":"1-14"},"PeriodicalIF":2.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250770","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
Exploring the applications of platelet-rich plasma in tissue engineering and regenerative medicine: evidence from goat and sheep experimental research. 探索富血小板血浆在组织工程和再生医学中的应用:来自山羊和绵羊实验研究的证据。
IF 2.8 4区 医学
Connective Tissue Research Pub Date : 2024-09-01 Epub Date: 2024-09-09 DOI: 10.1080/03008207.2024.2397657
Khan Sharun, S Amitha Banu, Hussein M El-Husseiny, Laith Abualigah, A M Pawde, Kuldeep Dhama, Amarpal
{"title":"Exploring the applications of platelet-rich plasma in tissue engineering and regenerative medicine: evidence from goat and sheep experimental research.","authors":"Khan Sharun, S Amitha Banu, Hussein M El-Husseiny, Laith Abualigah, A M Pawde, Kuldeep Dhama, Amarpal","doi":"10.1080/03008207.2024.2397657","DOIUrl":"10.1080/03008207.2024.2397657","url":null,"abstract":"<p><p>Platelet-rich plasma (PRP) has emerged as a promising therapeutic approach in regenerative medicine. It contains various growth factors and bioactive molecules that play pivotal roles in tissue repair, regeneration, and inflammation modulation. This comprehensive narrative review delves into the therapeutic potential of PRP in experimental goat and sheep research, exploring recent advancements, challenges, and future prospects in the field. PRP has been explored for its application in musculoskeletal injuries, wound healing, and orthopedic conditions. Studies have demonstrated the ability of PRP to accelerate tissue healing, reduce inflammation, and improve the overall quality of healing. Recent advancements in PRP technology have led to the development of novel formulations and delivery methods to enhance its therapeutic efficacy. PRP has shown promise in tendon and ligament injuries, osteoarthritis, and bone fractures in experimental goat and sheep research. Despite these advancements, several challenges and opportunities exist to harness the full therapeutic potential of PRP in regenerative medicine. Standardizing PRP preparation protocols, including blood collection techniques, centrifugation parameters, and activation methods, is essential to ensure consistency and reproducibility of the findings. Moreover, further research is needed to elucidate the optimal dosing, frequency, and timing of PRP administration for different clinical indications. Research conducted in goat and sheep models provides evidence supporting the translational potential of PRP in tissue engineering and regenerative medicine. By harnessing the regenerative properties of PRP and leveraging insights from preclinical studies, researchers can develop innovative therapeutic strategies to address unmet clinical needs and improve patient outcomes in diverse medical specialties.</p>","PeriodicalId":10661,"journal":{"name":"Connective Tissue Research","volume":" ","pages":"364-382"},"PeriodicalIF":2.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142153325","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信