Journal of Tissue Engineering最新文献

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An organotypic oral mucosal infection model to study host-pathogen interactions. 研究宿主-病原体相互作用的器官型口腔粘膜感染模型。
IF 8.2 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-10-21 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231197310
Samantha J Gould, Andrew D Foey, Vehid M Salih
{"title":"An organotypic oral mucosal infection model to study host-pathogen interactions.","authors":"Samantha J Gould,&nbsp;Andrew D Foey,&nbsp;Vehid M Salih","doi":"10.1177/20417314231197310","DOIUrl":"10.1177/20417314231197310","url":null,"abstract":"<p><p>Early <i>in vitro</i> oral mucosal infection models (OMMs) failed to consider the suitability of the model environment to represent the host immune response. Denture stomatitis (DS) is mediated by <i>Candida albicans</i>, but the role of <i>Staphylococcus aureus</i> remains uncertain. A collagen hydrogel-based OMM containing HaCaT and HGF cell types was developed, characterised and employed to study of tissue invasion and pro-inflammatory cytokine production in response to pathogens. Models formed a robust epithelium. Despite their inflammatory baseline, 24-h infection with <i>C. albicans</i>, and/or <i>S. aureus</i> led to tissue invasion, and significantly upregulated IL-6 and IL-8 production by OMMs when compared to the unstimulated control. No significant difference in IL-6 or IL-8 production by OMMs was observed between single and dual infections. These attributes indicate that this newly developed OMM is suitable for the study of DS and could be implemented for the wider study of oral infection.</p>","PeriodicalId":17384,"journal":{"name":"Journal of Tissue Engineering","volume":"14 ","pages":"20417314231197310"},"PeriodicalIF":8.2,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/12/5b/10.1177_20417314231197310.PMC10590543.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49691142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Engineered heart tissue maturation inhibits cardiomyocyte proliferative response to cryoinjury. 工程心脏组织成熟抑制心肌细胞对冷冻损伤的增殖反应。
IF 8.2 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-10-11 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231190147
Giulio Ciucci, Karim Rahhali, Giovanni Cimmino, Francesco Natale, Paolo Golino, Gianfranco Sinagra, Chiara Collesi, Francesco S Loffredo
{"title":"Engineered heart tissue maturation inhibits cardiomyocyte proliferative response to cryoinjury.","authors":"Giulio Ciucci,&nbsp;Karim Rahhali,&nbsp;Giovanni Cimmino,&nbsp;Francesco Natale,&nbsp;Paolo Golino,&nbsp;Gianfranco Sinagra,&nbsp;Chiara Collesi,&nbsp;Francesco S Loffredo","doi":"10.1177/20417314231190147","DOIUrl":"10.1177/20417314231190147","url":null,"abstract":"<p><p>The cellular and molecular mechanisms that are responsible for the poor regenerative capacity of the adult heart after myocardial infarction (MI) are still unclear and their understanding is crucial to develop novel regenerative therapies. Considering the lack of reliable in vitro tissue-like models to evaluate the molecular mechanisms of cardiac regeneration, we used cryoinjury on rat Engineered Heart Tissues (rEHTs) as a new model which recapitulates in part the in vivo response after myocardial injury of neonatal and adult heart. When we subjected to cryoinjury immature and mature rEHTs, we observed a significant increase in cardiomyocyte (CM) DNA synthesis when compared to the controls. As expected, the number of mitotic CMs significantly increases in immature rEHTs when compared to mature rEHTs, suggesting that the extent of CM maturation plays a crucial role in their proliferative response after cryoinjury. Moreover, we show that cryoinjury induces a temporary activation of fibroblast response in mature EHTs, similar to the early response after MI, that is however incomplete in immature EHTs. Our results support the hypothesis that the endogenous maturation program in cardiac myocytes plays a major role in determining the proliferative response to injury. Therefore, we propose rEHTs as a robust, novel tool to in vitro investigate critical aspects of cardiac regeneration in a tissue-like asset free from confounding factors in response to injury, such as the immune system response or circulating inflammatory cytokines.</p>","PeriodicalId":17384,"journal":{"name":"Journal of Tissue Engineering","volume":"14 ","pages":"20417314231190147"},"PeriodicalIF":8.2,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/c6/85/10.1177_20417314231190147.PMC10571691.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41236381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reconstructing vascular networks promotes the repair of skeletal muscle following volumetric muscle loss by pre-vascularized tissue constructs. 重建血管网络通过预血管化组织结构促进体积肌肉损失后骨骼肌的修复。
IF 8.2 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-09-21 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231201231
Chih-Long Chen, Shih-Yen Wei, Wei-Lin Chen, Ting-Lun Hsu, Ying-Chieh Chen
{"title":"Reconstructing vascular networks promotes the repair of skeletal muscle following volumetric muscle loss by pre-vascularized tissue constructs.","authors":"Chih-Long Chen,&nbsp;Shih-Yen Wei,&nbsp;Wei-Lin Chen,&nbsp;Ting-Lun Hsu,&nbsp;Ying-Chieh Chen","doi":"10.1177/20417314231201231","DOIUrl":"https://doi.org/10.1177/20417314231201231","url":null,"abstract":"<p><p>Current treatment for complex and large-scale volumetric muscle loss (VML) injuries remains a limited success and have substantial disadvantages, due to the irreversible loss of muscle mass, slow muscle regeneration, and rapid formation of non-functional fibrosis scars. These VML injuries are accompanied by denervation and the destruction of native vasculature which increases difficulties in the functional restoration of muscle. Here, reconstruction of the vascular network at the injury site was offered as a possible solution for improving the repair of muscle defects through the timely supply of nutrients and oxygen to surrounding cells. A hydrogel-based tissue construct containing various densities of the vascular network was successfully created in the subcutaneous space of mice by manipulating hydrogel properties, and then implanted into the VML injury site. One month after implantation, the mouse treated with the highly vascularized tissue had extensive muscle repair at the injury site and only spent a shorter time completing the inclined plane tests. These findings suggest that the reconstruction of the functional vascular network at the VML injury site accelerated muscle fiber repair through a timely supply of sufficient blood and avoided invasion by host fibroblasts.</p>","PeriodicalId":17384,"journal":{"name":"Journal of Tissue Engineering","volume":"14 ","pages":"20417314231201231"},"PeriodicalIF":8.2,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ce/69/10.1177_20417314231201231.PMC10517612.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41131080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Establishing an hTERT-driven immortalized umbilical cord-derived mesenchymal stem cell line and its therapeutic application in mice with liver failure. hTERT驱动的永生化脐带间充质干细胞系的建立及其在肝衰竭小鼠中的治疗应用。
IF 8.2 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-09-19 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231200328
Qi Chen, Meixian Jin, Simin Wang, Kexin Wang, Liqin Chen, Xiaojuan Zhu, Ying Zhang, Yi Wang, Yang Li, Shao Li, Youmin Zeng, Lei Feng, Wanren Yang, Yi Gao, Shuqin Zhou, Qing Peng
{"title":"Establishing an hTERT-driven immortalized umbilical cord-derived mesenchymal stem cell line and its therapeutic application in mice with liver failure.","authors":"Qi Chen,&nbsp;Meixian Jin,&nbsp;Simin Wang,&nbsp;Kexin Wang,&nbsp;Liqin Chen,&nbsp;Xiaojuan Zhu,&nbsp;Ying Zhang,&nbsp;Yi Wang,&nbsp;Yang Li,&nbsp;Shao Li,&nbsp;Youmin Zeng,&nbsp;Lei Feng,&nbsp;Wanren Yang,&nbsp;Yi Gao,&nbsp;Shuqin Zhou,&nbsp;Qing Peng","doi":"10.1177/20417314231200328","DOIUrl":"https://doi.org/10.1177/20417314231200328","url":null,"abstract":"<p><p>Acute liver failure (ALF) is characterized by rapid liver cell destruction. It is a multi-etiological and fulminant complication with a clinical mortality of over 80%. Therapy using mesenchymal stem cells (MSCs) or MSCs-derived exosomes can alleviate acute liver injury, which has been demonstrated in animal experiments and clinical application. However, similar to other stem cells, different cell sources, poor stability, cell senescence and other factors limit the clinical application of MSCs. To achieve mass production and quality control on stem cells and their exosomes, transfecting umbilical cord mesenchymal stem cell (UCMSC) with lentivirus overexpressing human telomerase reverse transcriptase (hTERT) gene, the hTERT-UCMSC was constructed as an immortalized MSC cell line. Compared with the primary UCMSC (P3) and immortalized cell line hTERT-UCMSC at early passage (P10), the hTERT-UCMSC retained the key morphological and physiological characteristics of UCMSC at the 35th passage (P35), and showed no signs of carcinogenicity and toxic effect in mice. There was no difference in either exosome production or characteristics of exosomes among cultures from P3 primary cells, P10 and P35 immortalized hTERT-UCMSCs. Inoculation of either hTERT-UCMSC (P35) or its exosomes improved the survival rate and liver function of ALF mice induced by thioacetamide (TAA). Our findings suggest that this immortalized cell line can maintain its characteristics in long-term culture. Inoculation of hTERT-UCMSC and its exosomes could potentially be used in clinics for the treatment of liver failure in the future.</p>","PeriodicalId":17384,"journal":{"name":"Journal of Tissue Engineering","volume":"14 ","pages":"20417314231200328"},"PeriodicalIF":8.2,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/6b/91/10.1177_20417314231200328.PMC10510347.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41134197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
3D bioprinting of corneal models: A review of the current state and future outlook. 角膜模型的3D生物打印:现状和未来展望综述。
IF 8.2 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-09-15 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231197793
Leon Balters, Stephan Reichl
{"title":"3D bioprinting of corneal models: A review of the current state and future outlook.","authors":"Leon Balters,&nbsp;Stephan Reichl","doi":"10.1177/20417314231197793","DOIUrl":"10.1177/20417314231197793","url":null,"abstract":"<p><p>The cornea is the outermost layer of the eye and serves to protect the eye and enable vision by refracting light. The need for cornea organ donors remains high, and the demand for an artificial alternative continues to grow. 3D bioprinting is a promising new method to create artificial organs and tissues. 3D bioprinting offers the precise spatial arrangement of biomaterials and cells to create 3D constructs. As the cornea is an avascular tissue which makes it more attractive for 3D bioprinting, it could be one of the first tissues to be made fully functional via 3D bioprinting. This review discusses the most common 3D bioprinting technologies and biomaterials used for 3D bioprinting corneal models. Additionally, the current state of 3D bioprinted corneal models, especially specific characteristics such as light transmission, biomechanics, and marker expression, and in vivo studies are discussed. Finally, the current challenges and future prospects are presented.</p>","PeriodicalId":17384,"journal":{"name":"Journal of Tissue Engineering","volume":"14 ","pages":"20417314231197793"},"PeriodicalIF":8.2,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/d3/3e/10.1177_20417314231197793.PMC10504850.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10635108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tendon tissue engineering: An overview of biologics to promote tendon healing and repair. 肌腱组织工程:促进肌腱愈合和修复的生物制品综述。
IF 8.2 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-09-13 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231196275
Vera Citro, Marta Clerici, Aldo R Boccaccini, Giovanna Della Porta, Nicola Maffulli, Nicholas R Forsyth
{"title":"Tendon tissue engineering: An overview of biologics to promote tendon healing and repair.","authors":"Vera Citro,&nbsp;Marta Clerici,&nbsp;Aldo R Boccaccini,&nbsp;Giovanna Della Porta,&nbsp;Nicola Maffulli,&nbsp;Nicholas R Forsyth","doi":"10.1177/20417314231196275","DOIUrl":"10.1177/20417314231196275","url":null,"abstract":"<p><p>Tendons are dense connective tissues with a hierarchical polarized structure that respond to and adapt to the transmission of muscle contraction forces to the skeleton, enabling motion and maintaining posture. Tendon injuries, also known as tendinopathies, are becoming more common as populations age and participation in sports/leisure activities increases. The tendon has a poor ability to self-heal and regenerate given its intrinsic, constrained vascular supply and exposure to frequent, severe loading. There is a lack of understanding of the underlying pathophysiology, and it is not surprising that disorder-targeted medicines have only been partially effective at best. Recent tissue engineering approaches have emerged as a potential tool to drive tendon regeneration and healing. In this review, we investigated the physiochemical factors involved in tendon ontogeny and discussed their potential application in vitro to reproduce functional and self-renewing tendon tissue. We sought to understand whether stem cells are capable of forming tendons, how they can be directed towards the tenogenic lineage, and how their growth is regulated and monitored during the entire differentiation path. Finally, we showed recent developments in tendon tissue engineering, specifically the use of mesenchymal stem cells (MSCs), which can differentiate into tendon cells, as well as the potential role of extracellular vesicles (EVs) in tendon regeneration and their potential for use in accelerating the healing response after injury.</p>","PeriodicalId":17384,"journal":{"name":"Journal of Tissue Engineering","volume":"14 ","pages":"20417314231196275"},"PeriodicalIF":8.2,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10501083/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10635109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
3D Bioprinting tissue analogs: Current development and translational implications. 三维生物打印组织类似物:当前发展和转化意义。
IF 6.7 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-07-13 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231187113
Suihong Liu, Lijia Cheng, Yakui Liu, Haiguang Zhang, Yongteng Song, Jeong-Hui Park, Khandmaa Dashnyam, Jung-Hwan Lee, Fouad Al-Hakim Khalak, Oliver Riester, Zheng Shi, Serge Ostrovidov, Hirokazu Kaji, Hans-Peter Deigner, José Luis Pedraz, Jonathan C Knowles, Qingxi Hu, Hae-Won Kim, Murugan Ramalingam
{"title":"3D Bioprinting tissue analogs: Current development and translational implications.","authors":"Suihong Liu, Lijia Cheng, Yakui Liu, Haiguang Zhang, Yongteng Song, Jeong-Hui Park, Khandmaa Dashnyam, Jung-Hwan Lee, Fouad Al-Hakim Khalak, Oliver Riester, Zheng Shi, Serge Ostrovidov, Hirokazu Kaji, Hans-Peter Deigner, José Luis Pedraz, Jonathan C Knowles, Qingxi Hu, Hae-Won Kim, Murugan Ramalingam","doi":"10.1177/20417314231187113","DOIUrl":"10.1177/20417314231187113","url":null,"abstract":"<p><p>Three-dimensional (3D) bioprinting is a promising and rapidly evolving technology in the field of additive manufacturing. It enables the fabrication of living cellular constructs with complex architectures that are suitable for various biomedical applications, such as tissue engineering, disease modeling, drug screening, and precision regenerative medicine. The ultimate goal of bioprinting is to produce stable, anatomically-shaped, human-scale functional organs or tissue substitutes that can be implanted. Although various bioprinting techniques have emerged to develop customized tissue-engineering substitutes over the past decade, several challenges remain in fabricating volumetric tissue constructs with complex shapes and sizes and translating the printed products into clinical practice. Thus, it is crucial to develop a successful strategy for translating research outputs into clinical practice to address the current organ and tissue crises and improve patients' quality of life. This review article discusses the challenges of the existing bioprinting processes in preparing clinically relevant tissue substitutes. It further reviews various strategies and technical feasibility to overcome the challenges that limit the fabrication of volumetric biological constructs and their translational implications. Additionally, the article highlights exciting technological advances in the 3D bioprinting of anatomically shaped tissue substitutes and suggests future research and development directions. This review aims to provide readers with insight into the state-of-the-art 3D bioprinting techniques as powerful tools in engineering functional tissues and organs.</p>","PeriodicalId":17384,"journal":{"name":"Journal of Tissue Engineering","volume":"14 ","pages":"20417314231187113"},"PeriodicalIF":6.7,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/2b/13/10.1177_20417314231187113.PMC10350769.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10648385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Extracellular matrix-derived peptide stimulates the generation of endocrine progenitors and islet organoids from iPSCs. 细胞外基质衍生肽可刺激 iPSCs 产生内分泌祖细胞和胰岛器官组织。
IF 6.7 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-07-08 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231185858
Emma S Heaton, Ming Hu, Tianzheng Liu, Huang Hui, Yinfei Tan, Kaiming Ye, Sha Jin
{"title":"Extracellular matrix-derived peptide stimulates the generation of endocrine progenitors and islet organoids from iPSCs.","authors":"Emma S Heaton, Ming Hu, Tianzheng Liu, Huang Hui, Yinfei Tan, Kaiming Ye, Sha Jin","doi":"10.1177/20417314231185858","DOIUrl":"10.1177/20417314231185858","url":null,"abstract":"<p><p>Induced pluripotent stem cells (iPSCs) have enormous potential in producing human tissues endlessly. We previously reported that type V collagen (COL5), a pancreatic extracellular matrix protein, promotes islet development and maturation from iPSCs. In this study, we identified a bioactive peptide domain of COL5, WWASKS, through bioinformatic analysis of decellularized pancreatic ECM (dpECM)-derived collagens. RNA-sequencing suggests that WWASKS induces the formation of pancreatic endocrine progenitors while suppressing the development of other types of organs. The expressions of hypoxic genes were significantly downregulated in the endocrine progenitors formed under peptide stimulation. Furthermore, we unveiled an enhancement of iPSC-derived islets' (i-islets) glucose sensitivity under peptide stimulation. These i-islets secrete insulin in a glucose responsive manner. They were comprised of α, β, δ, and γ cells and were assembled into a tissue architecture similar to that of human islets. Mechanistically, the peptide is able to activate the canonical Wnt signaling pathway, permitting the translocation of β-catenin from the cytoplasm to the nucleus for pancreatic progenitor development. Collectively, for the first time, we demonstrated that an ECM-derived peptide dictates iPSC fate toward the generation of endocrine progenitors and subsequent islet organoids.</p>","PeriodicalId":17384,"journal":{"name":"Journal of Tissue Engineering","volume":"14 ","pages":"20417314231185858"},"PeriodicalIF":6.7,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/c4/7d/10.1177_20417314231185858.PMC10331343.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10299535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SP7 gene silencing dampens bone marrow stromal cell hypertrophy, but it also dampens chondrogenesis. SP7基因沉默会抑制骨髓基质细胞肥大,但同时也会抑制软骨生成。
IF 6.7 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-06-21 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231177136
Rose Ann G Franco, Eamonn McKenna, Pamela G Robey, Ross W Crawford, Michael R Doran, Kathryn Futrega
{"title":"<i>SP7</i> gene silencing dampens bone marrow stromal cell hypertrophy, but it also dampens chondrogenesis.","authors":"Rose Ann G Franco, Eamonn McKenna, Pamela G Robey, Ross W Crawford, Michael R Doran, Kathryn Futrega","doi":"10.1177/20417314231177136","DOIUrl":"10.1177/20417314231177136","url":null,"abstract":"<p><p>For bone marrow stromal cells (BMSC) to be useful in cartilage repair their propensity for hypertrophic differentiation must be overcome. A single day of TGF-β1 stimulation activates intrinsic signaling cascades in BMSCs which subsequently drives both chondrogenic and hypertrophic differentiation. TGF-β1 stimulation upregulates <i>SP7</i>, a transcription factor known to contribute to hypertrophic differentiation, and <i>SP7</i> remains upregulated even if TGF-β1 is subsequently withdrawn from the chondrogenic induction medium. Herein, we stably transduced BMSCs to express an shRNA designed to silence <i>SP7</i>, and assess the capacity of <i>SP7</i> silencing to mitigate hypertrophy. <i>SP7</i> silencing dampened both hypertrophic and chondrogenic differentiation processes, resulting in diminished microtissue size, impaired glycosaminoglycan production and reduced chondrogenic and hypertrophic gene expression. Thus, while hypertrophic features were dampened by <i>SP7</i> silencing, chondrogenic differentation was also compromised. We further investigated the role of <i>SP7</i> in monolayer osteogenic and adipogenic cultures, finding that <i>SP7</i> silencing dampened characteristic mineralization and lipid vacuole formation, respectively. Overall, <i>SP7</i> silencing affects the trilineage differentiation of BMSCs, but is insufficient to decouple BMSC hypertrophy from chondrogenesis. These data highlight the challenge of promoting BMSC chondrogenesis whilst simultaneously reducing hypertrophy in cartilage tissue engineering strategies.</p>","PeriodicalId":17384,"journal":{"name":"Journal of Tissue Engineering","volume":"14 ","pages":"20417314231177136"},"PeriodicalIF":6.7,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10288420/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10299862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of extracellular vesicle isolation processes for therapeutic applications. 比较用于治疗的细胞外囊泡分离过程。
IF 6.7 1区 工程技术
Journal of Tissue Engineering Pub Date : 2023-05-23 eCollection Date: 2023-01-01 DOI: 10.1177/20417314231174609
Soraya Williams, Maria Fernandez-Rhodes, Alice Law, Ben Peacock, Mark P Lewis, Owen G Davies
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