APL Bioengineering最新文献

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Mechanical cues orchestrate monocyte behavior in immune regulation and disease. 机械信号在免疫调节和疾病中协调单核细胞的行为。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-27 eCollection Date: 2025-06-01 DOI: 10.1063/5.0268234
Yifan Lin, Hardik Makkar, Shuchen Zhang, Bingling Chen, Chaoning Zhan, Kyle Vining
{"title":"Mechanical cues orchestrate monocyte behavior in immune regulation and disease.","authors":"Yifan Lin, Hardik Makkar, Shuchen Zhang, Bingling Chen, Chaoning Zhan, Kyle Vining","doi":"10.1063/5.0268234","DOIUrl":"https://doi.org/10.1063/5.0268234","url":null,"abstract":"<p><p>Monocytes, key mediators of innate immunity, exhibit remarkable sensitivity to mechanical cues such as extracellular matrix (ECM) stiffness, substrate rigidity, shear stress, compression, and hydrostatic pressure, which shape their activation, differentiation, and functional polarization. Monocytes develop from the bone marrow and populate the vasculature throughout the body. During inflammation, they are recruited to injured or diseased tissues by chemokines and proinflammatory cytokines, modulating local immune responses during embryonic development and adulthood via mechanosensing and mechanotransduction pathways. This review synthesizes recent advances in monocyte mechanobiology. It highlights how the bone marrow ECM mechanics orchestrates myelopoiesis, the role of endothelium and hemodynamic forces in migration, and how tissue mechanics influences monocyte fate in chronic inflammation, fibrosis, and cancer. We discuss the mechanosensitive pathways that govern monocyte behavior in health and disease and therapeutic opportunities that emerge from targeting these mechanisms via biomaterial approaches. Additionally, future directions toward developing mechanotherapy for immune modulation are discussed. By bridging mechanobiology and immunology, this review underscores the potential of mechanical cues as therapeutic targets to reprogram monocyte behavior in disease.</p>","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"021506"},"PeriodicalIF":6.6,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12205964/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144530319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Recent advancements in polymer science for retinal diseases: New frontiers in drug delivery systems. 视网膜疾病聚合物科学的最新进展:药物输送系统的新领域。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-27 eCollection Date: 2025-06-01 DOI: 10.1063/5.0264382
Weiliang Wang, Nancy Wang, Xinxin Zhao, Xinyi Su, Zengping Liu
{"title":"Recent advancements in polymer science for retinal diseases: New frontiers in drug delivery systems.","authors":"Weiliang Wang, Nancy Wang, Xinxin Zhao, Xinyi Su, Zengping Liu","doi":"10.1063/5.0264382","DOIUrl":"https://doi.org/10.1063/5.0264382","url":null,"abstract":"<p><p>Retinal diseases, such as age-related macular degeneration and diabetic macular edema, are significant contributors to vision loss. While injection of anti-vascular endothelial growth factors is the current gold standard treatment, their invasive nature reduces patient compliance and treatment outcomes and increases the risk of complications. In this review, we explore the recent advancements in drug delivery systems designed to overcome ocular barriers to effectively deliver drugs to the retina. We examine advancements in intravitreal injections, such as novel formulations, therapeutic molecules, and sustained-release implants. Moreover, we discuss innovations in noninvasive strategies, such as topical delivery systems incorporating cell-penetrating peptides, solid lipid nanoparticles, dendrimers, and nano-micelles. These technologies aim to enhance drug penetration, stability, and bioavailability. Although preclinical and clinical trials have yielded promising results, challenges remain in ensuring long-term safety and efficacy. This review highlights future research directions to optimize these approaches and develop more effective, patient-friendly therapies for retinal diseases.</p>","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"020902"},"PeriodicalIF":6.6,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12205963/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144530320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Epigenetic regulation and mechanobiological adaptation in tenocytes during maturation. 细胞成熟过程中的表观遗传调控和机械生物学适应。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-26 eCollection Date: 2025-06-01 DOI: 10.1063/5.0271050
Ellen Y Zhang, Tyler E Blanch, Saeed B Ahmed, Xi Jiang, Nathaniel A Dyment, Su Chin Heo
{"title":"Epigenetic regulation and mechanobiological adaptation in tenocytes during maturation.","authors":"Ellen Y Zhang, Tyler E Blanch, Saeed B Ahmed, Xi Jiang, Nathaniel A Dyment, Su Chin Heo","doi":"10.1063/5.0271050","DOIUrl":"https://doi.org/10.1063/5.0271050","url":null,"abstract":"<p><p>Tendons are essential for musculoskeletal function, facilitating movement by transmitting forces from muscles to bones. However, aging alters the tendon microenvironment, disrupting the delicate interactions between tenocytes and the extracellular matrix (ECM), contributing to tissue degeneration. While prior studies have characterized the mechanical and structural changes in tendons during maturation, the epigenetic regulation of tenocyte function during aging remains poorly understood. Here, we investigate age-dependent mechanobiological and epigenetic changes in murine tenocytes. Our findings demonstrate that mature tenocytes generate higher traction forces and migrate faster. Furthermore, we reveal increased chromatin condensation in mature tenocytes, accompanied by elevated levels of the repressive histone mark H3K27me3 and reduced levels of the activating mark H3K4me3. Chromatin immunoprecipitation sequencing indicates that these histone modifications regulate genes associated with cellular contractility, ECM production, and mechanotransduction, highlighting the critical role of epigenetic mechanisms in governing tenocyte function. These findings suggest that age-related epigenetic changes may contribute to both the maintenance of tissue homeostasis and the suppression of degenerative diseases in tendons, providing new avenues for therapeutic strategies aimed at restoring tenocyte function and enhancing tendon regeneration.</p>","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"026127"},"PeriodicalIF":6.6,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12204717/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144530318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Applying physical principles to cancer research. 将物理原理应用于癌症研究。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-26 eCollection Date: 2025-06-01 DOI: 10.1063/5.0282296
Claudia Fischbach, Corey S O'Hern, Adam J Engler
{"title":"Applying physical principles to cancer research.","authors":"Claudia Fischbach, Corey S O'Hern, Adam J Engler","doi":"10.1063/5.0282296","DOIUrl":"https://doi.org/10.1063/5.0282296","url":null,"abstract":"","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"020402"},"PeriodicalIF":6.6,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12204716/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144530317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
The mechanobiology of fibroblast activation in disease. 成纤维细胞在疾病中活化的机械生物学。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-18 eCollection Date: 2025-06-01 DOI: 10.1063/5.0272393
Yeji Chang, Jia Wen Nicole Lee, Andrew W Holle
{"title":"The mechanobiology of fibroblast activation in disease.","authors":"Yeji Chang, Jia Wen Nicole Lee, Andrew W Holle","doi":"10.1063/5.0272393","DOIUrl":"10.1063/5.0272393","url":null,"abstract":"<p><p>Fibroblasts play crucial roles in wound healing, cancer, and fibrosis. Many aspects of these roles are driven by the process known as fibroblast activation. The generally accepted definition of fibroblast activation is the transition from a quiescent state to a state in which fibroblasts participate in a number of active processes, including extracellular matrix (ECM) production and remodeling, elevated contractility, and enhanced migratory capacity, although there is no universal consensus on what exactly constitutes \"activation.\" Interestingly, the time scale of activation is not consistent across tissues and disease states; some fibroblasts quickly return to quiescence after activation (e.g., in wound healing), others undergo apoptosis, while a subset become persistently activated. This activation, both acute and persistent, is inherently a mechanical process, given the increase in ECM production and remodeling and the enhanced traction force generation. Thus, there exists a dynamic reciprocity, or cell-ECM feedback, in which activated fibroblasts produce a mechanical microenvironment that in turn supports persistent activation. This has a wide variety of implications for disease, most notably fibrosis and cancer, as the fibroblasts that become persistently activated in connection with these conditions can contribute to disease state progression. Like other mechanosensitive processes, this mechanically induced persistent fibroblast activation is driven by a number of mechanotransduction signaling pathways. Thus, an opportunity exists in which the mechanosensitive underpinning of fibroblast activation can be leveraged to improve clinical outcomes. Here, we highlight these opportunities and make a call to the field to consider the mechanosensitive pathways governing fibroblast activation as an important frontier in mechanomedicine.</p>","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"021505"},"PeriodicalIF":6.6,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12178607/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144334123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Astrocyte-driven vasoconstriction impairs glymphatic clearance in a human tauopathy-on-chip model. 星形胶质细胞驱动的血管收缩损害了人类芯片上的牛头病变模型中的淋巴清除。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-16 eCollection Date: 2025-06-01 DOI: 10.1063/5.0261875
Rena Park, Yansong Peng, Aria R Yslas, Esak Lee
{"title":"Astrocyte-driven vasoconstriction impairs glymphatic clearance in a human tauopathy-on-chip model.","authors":"Rena Park, Yansong Peng, Aria R Yslas, Esak Lee","doi":"10.1063/5.0261875","DOIUrl":"10.1063/5.0261875","url":null,"abstract":"<p><p>The glymphatic system is a critical pathway for clearing metabolic waste from the brain by mediating cerebrospinal fluid and interstitial fluid exchange. In Alzheimer's disease (AD), tau protein accumulation is strongly associated with impaired glymphatic clearance, yet the underlying mechanism remains poorly defined. In this study, we employed a three-dimensional human glymphatics-on-chip model to investigate fluid transport and mass clearance in a brain-mimetic extracellular matrix containing engineered blood vessels (BV) surrounded by primary astrocytes. We found that phosphorylated tau (p-tau) induced morphological transformation of astrocytes into a hypertrophic, hypercontractile state, leading to astrocyte-mediated vasoconstriction and impaired glymphatic clearance. Notably, p-tau did not affect blood endothelial cells directly, implicating astrocyte-dependent mechanisms in glymphatic deregulation. Pharmacological inhibition of non-muscle myosin II with blebbistatin reversed astrocytic hypercontractility, restored BV diameters, and rescued glymphatic function. These findings elucidate a glial-specific mechanism of tau-induced glymphatic dysfunction and underscore astrocytic contractility as a promising therapeutic target in AD.</p>","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"026126"},"PeriodicalIF":6.6,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12173474/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144318359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Decoding force-transmission linkages for therapeutic targeting and engineering. 解码力-传输联系的治疗靶向和工程。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-13 eCollection Date: 2025-06-01 DOI: 10.1063/5.0267032
Jingzhun Liu, Yunxin Deng, Jie Yan
{"title":"Decoding force-transmission linkages for therapeutic targeting and engineering.","authors":"Jingzhun Liu, Yunxin Deng, Jie Yan","doi":"10.1063/5.0267032","DOIUrl":"10.1063/5.0267032","url":null,"abstract":"<p><p>Mechanosensing and mechanotransduction enable cells to perceive and respond to mechanical forces, underpinning essential physiological processes and disease pathways. Central to these phenomena are force-transmission supramolecular linkages, which undergo structural transitions and regulate signaling proteins in response to mechanical stimuli. This review examines the mechanisms of these force-bearing linkages, focusing on force duration, dictated by the stability of protein-protein interfaces, and force-dependent mechanical structural changes of force-bearing domains in the linkage, which activates or deactivates mechanosensing domains. We discuss the emerging potential of these linkages as pharmaceutical targets, exploring drugs and peptides designed to modulate these mechanical properties. In addition, we highlight the application of artificial intelligence in protein engineering to enhance therapeutic precision by dynamically tuning these mechanosensing characteristics. Our synthesis of current findings and future perspectives aims to inform novel approaches to drug design and inspire future research in the field of mechanomedicine.</p>","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"021504"},"PeriodicalIF":6.6,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12166987/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144303265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Modeling nitric oxide diffusion and plasticity modulation in cerebellar learning. 模拟小脑学习中的一氧化氮扩散和可塑性调节。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-12 eCollection Date: 2025-06-01 DOI: 10.1063/5.0250953
Alessandra Maria Trapani, Carlo Andrea Sartori, Benedetta Gambosi, Alessandra Pedrocchi, Alberto Antonietti
{"title":"Modeling nitric oxide diffusion and plasticity modulation in cerebellar learning.","authors":"Alessandra Maria Trapani, Carlo Andrea Sartori, Benedetta Gambosi, Alessandra Pedrocchi, Alberto Antonietti","doi":"10.1063/5.0250953","DOIUrl":"10.1063/5.0250953","url":null,"abstract":"<p><p>Nitric oxide (NO) is a versatile signaling molecule with significant roles in various physiological processes, including synaptic plasticity and memory formation. In the cerebellum, NO is produced by neural NO synthase and diffuses to influence synaptic changes, particularly at parallel fiber-Purkinje cell synapses. This study aims to investigate NO's role in cerebellar learning mechanisms using a biologically realistic simulation-based approach. We developed the NO Diffusion Simulator (NODS), a Python module designed to model NO production and diffusion within a cerebellar spiking neural network framework. Our simulations focus on the eye-blink classical conditioning protocol to assess the impact of NO modulation on long-term potentiation and depression at parallel fiber-Purkinje cell synapses. The results demonstrate that NO diffusion significantly affects synaptic plasticity, dynamically adjusting learning rates based on synaptic activity patterns. This metaplasticity mechanism enhances the cerebellum's capacity to prioritize relevant inputs and mitigate learning interference, selectively modulating synaptic efficacy. Our findings align with theoretical models, suggesting that NO serves as a contextual indicator, optimizing learning rates for effective motor control and adaptation to new tasks. The NODS implementation provides an efficient tool for large-scale simulations, facilitating future studies on NO dynamics in various brain regions and neurovascular coupling scenarios. By bridging the gap between molecular processes and network-level learning, this work underscores the critical role of NO in cerebellar function and offers a robust framework for exploring NO-dependent plasticity in computational neuroscience.</p>","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"026125"},"PeriodicalIF":6.6,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12165721/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144303266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Application of instant assembly of collagen to bioprint cardiac tissues. 胶原即刻组装在心脏组织生物打印中的应用。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-12 eCollection Date: 2025-06-01 DOI: 10.1063/5.0252746
Hugh Xiao, Zixie Liang, Xiangyu Gong, Seyma Nayir Jordan, Alejandro Rossello-Martinez, Ilhan Gokhan, Xia Li, Zhang Wen, Sein Lee, Stuart G Campbell, Yibing Qyang, Michael Mak
{"title":"Application of instant assembly of collagen to bioprint cardiac tissues.","authors":"Hugh Xiao, Zixie Liang, Xiangyu Gong, Seyma Nayir Jordan, Alejandro Rossello-Martinez, Ilhan Gokhan, Xia Li, Zhang Wen, Sein Lee, Stuart G Campbell, Yibing Qyang, Michael Mak","doi":"10.1063/5.0252746","DOIUrl":"10.1063/5.0252746","url":null,"abstract":"<p><p>Advancing cardiac tissue engineering requires innovative fabrication techniques, including 3D bioprinting and tissue maturation, to enable the generation of new muscle for repairing or replacing damaged heart tissue. Recent advances in tissue engineering have highlighted the need for rapid, high-resolution bioprinting methods that preserve cell viability and maintain structural fidelity. Traditional collagen-based bioinks gel slowly, limiting their use in bioprinting. Here, we implement TRACE (tunable rapid assembly of collagenous elements), a macromolecular crowding-driven bioprinting technique that enables the immediate gelation of collagen bioinks infused with cells. This overcomes the need for extended incubation, allowing for direct bioprinting of engineered cardiac tissues with high fidelity. Unlike methods that rely on high-concentration acidic collagen or fibrin for gelation, TRACE achieves rapid bioink stabilization without altering the biochemical composition. This ensures greater versatility in bioink selection while maintaining functional tissue outcomes. Additionally, agarose slurry provides stable structural support, preventing tissue collapse while allowing nutrient diffusion. This approach better preserves complex tissue geometries during culture than gelatin-based support baths or polydimethylsiloxane (PDMS) molds. Our results demonstrate that TRACE enables the bioprinting of structurally stable cardiac tissues with high resolution. By supporting the fabrication of biomimetic tissues, TRACE represents a promising advancement in bioprinting cardiac models and other engineered tissues.</p>","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"026124"},"PeriodicalIF":6.6,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12165719/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144303264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Evaluation of screw pull-out from plate fixation of en bloc distal radius resection with ulnar reconstruction: Finite element analysis and comparison with experiments on Thiel cadavers. 尺骨重建整块桡骨远端切除钢板内固定螺钉拔出的评价:有限元分析及与Thiel尸体的实验比较。
IF 6.6 3区 医学
APL Bioengineering Pub Date : 2025-06-11 eCollection Date: 2025-06-01 DOI: 10.1063/5.0248553
Wares Chancharoen, Theingi Nwe, Saran Seehanam, Napawan Taradolpisut, Thewarid Berkband, Thanapon Chobpenthai, Chavin Jongwannasiri, Laphatrada Yurasakpong
{"title":"Evaluation of screw pull-out from plate fixation of en bloc distal radius resection with ulnar reconstruction: Finite element analysis and comparison with experiments on Thiel cadavers.","authors":"Wares Chancharoen, Theingi Nwe, Saran Seehanam, Napawan Taradolpisut, Thewarid Berkband, Thanapon Chobpenthai, Chavin Jongwannasiri, Laphatrada Yurasakpong","doi":"10.1063/5.0248553","DOIUrl":"10.1063/5.0248553","url":null,"abstract":"<p><p>Fractures of the distal radius often require surgical intervention, with plate fixation being a standard stabilization method. Screw loosening and pull-out propose significant complications, necessitating comprehensive understanding of fixation stability factors. This study introduces a novel approach by the combination of finite element analysis (FEA) and experimental investigations on Thiel cadavers to evaluate screw pull-out behavior from plate fixation in en bloc distal radius resection with ulnar reconstruction. In comparison with previous investigations that used computational modeling or fresh-frozen cadaveric specimens, in the present research, FEA predictions specifically experimentally confirm the usage of Thiel cadavers, which better preserve soft tissue elasticity and hydration, thus more closely reflect <i>in vivo</i> conditions. Experimental set-up consisted of bending tests on cadavers and screw pull-out tests in Thiel-cadaveric radius specimens mimicking physiological conditions that induce the effects of screw pull-out. Finite element analysis and simulation were conducted using realistic clinical cases. Biomechanical test results indicated locking-plate deformation and screw loosening, particularly at locations closest to the ulnar bone gap. Torque measurements established various degrees of screw loosening, with the screws closest to the bone gap indicating maximum loosening. FEA demonstrated critical distributions of stresses in screws and locking plates, with good correlations to experimental findings. Screw pull-out force analysis showed vulnerability to loosening, particularly in the area of bone gaps, with findings consistent between biomechanical testing and FEA. This study offers valuable information on the surgical implications and biomechanical considerations of plate fixation for en bloc distal radius resection with ulnar reconstruction.</p>","PeriodicalId":46288,"journal":{"name":"APL Bioengineering","volume":"9 2","pages":"026123"},"PeriodicalIF":6.6,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12162135/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144286798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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