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Call for Special Issue Papers: Artificial Intelligence in Tissue Engineering and Biology. 征稿:组织工程和生物学中的人工智能。
IF 6.4 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2023-08-01 DOI: 10.1089/ten.teb.2023.29019.cfp
Jason L Guo, Michael Januszyk, Michael T Longaker
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引用次数: 0
Drug Delivery Approaches to Improve Tendon Healing. 改善肌腱愈合的给药方法
IF 5.1 2区 医学 Q2 CELL & TISSUE ENGINEERING Pub Date : 2023-08-01 Epub Date: 2023-03-08 DOI: 10.1089/ten.teb.2022.0188
Emmanuela Adjei-Sowah, Danielle S W Benoit, Alayna E Loiselle

Tendon injuries disrupt the transmission of forces from muscle to bone, leading to chronic pain, disability, and a large socioeconomic burden. Tendon injuries are prevalent; there are over 300,000 tendon repair procedures a year in the United States to address acute trauma or chronic tendinopathy. Successful restoration of function after tendon injury remains challenging clinically. Despite improvements in surgical and physical therapy techniques, the high complication rate of tendon repair procedures motivates the use of therapeutic interventions to augment healing. While many biological and tissue engineering approaches have attempted to promote scarless tendon healing, there is currently no standard clinical treatment to improve tendon healing. Moreover, the limited efficacy of systemic delivery of several promising therapeutic candidates highlights the need for tendon-specific drug delivery approaches to facilitate translation. This review article will synthesize the current state-of-the-art methods that have been used for tendon-targeted delivery through both systemic and local treatments, highlight emerging technologies used for tissue-specific drug delivery in other tissue systems, and outline future challenges and opportunities to enhance tendon healing through targeted drug delivery.

肌腱损伤破坏了从肌肉到骨骼的力量传递,导致慢性疼痛、残疾和巨大的社会经济负担。肌腱损伤非常普遍,美国每年有 30 多万例肌腱修复手术,用于治疗急性创伤或慢性肌腱病。肌腱损伤后成功恢复功能在临床上仍具有挑战性。尽管手术和理疗技术有所改进,但肌腱修复术的高并发症率促使人们使用治疗干预措施来促进愈合。虽然许多生物和组织工程方法都试图促进无疤痕肌腱愈合,但目前还没有一种标准的临床疗法能改善肌腱愈合。此外,几种有前景的候选疗法的全身给药疗效有限,这凸显了对肌腱特异性给药方法的需求,以促进转化。这篇综述文章将综述目前通过全身和局部治疗进行肌腱靶向给药的最先进方法,重点介绍在其他组织系统中用于组织特异性给药的新兴技术,并概述通过靶向给药促进肌腱愈合的未来挑战和机遇。
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引用次数: 0
A Case for Material Stiffness as a Design Parameter in Encapsulated Islet Transplantation. 将材料刚度作为包裹式胰岛移植设计参数的案例
IF 5.1 2区 医学 Q2 CELL & TISSUE ENGINEERING Pub Date : 2023-08-01 Epub Date: 2023-02-01 DOI: 10.1089/ten.TEB.2022.0157
Courtney D Johnson, Helim Aranda-Espinoza, John P Fisher

Diabetes is a disease that plagues over 463 million people globally. Approximately 40 million of these patients have type 1 diabetes mellitus (T1DM), and the global incidence is increasing by up to 5% per year. T1DM is where the body's immune system attacks the pancreas, specifically the pancreatic beta cells, with antibodies to prevent insulin production. Although current treatments such as exogenous insulin injections have been successful, exorbitant insulin costs and meticulous administration present the need for alternative long-term solutions to glucose dysregulation caused by diabetes. Encapsulated islet transplantation (EIT) is a tissue-engineered solution to diabetes. Donor islets are encapsulated in a semipermeable hydrogel, allowing the diffusion of oxygen, glucose, and insulin but preventing leukocyte infiltration and antibody access to the transplanted cells. Although successful in small animal models, EIT is still far from commercial use owing to necessary long-term systemic immunosuppressants and consistent immune rejection. Most published research has focused on tailoring the characteristics of the capsule material to promote clinical viability. However, most studies have been limited in scope to biochemical changes. Current mechanobiology studies on the effect of substrate stiffness on the function of leukocytes, especially macrophages-primary foreign body response (FBR) orchestrators, show promise in tailoring a favorable response to tissue-engineered therapies such as EIT. In this review, we explore strategies to improve the clinical viability of EIT. A brief overview of the immune system, the FBR, and current biochemical approaches will be elucidated throughout this exploration. Furthermore, an argument for using substrate stiffness as a capsule design parameter to increase EIT efficacy and clinical viability will be posed.

糖尿病是一种困扰全球超过 4.63 亿人的疾病。其中约有 4000 万患者患有 1 型糖尿病(T1DM),全球发病率正以每年高达 5%的速度递增。T1DM 是指人体免疫系统用抗体攻击胰腺,特别是胰腺 beta 细胞,阻止胰岛素分泌。尽管外源性胰岛素注射等现有治疗方法取得了成功,但高昂的胰岛素费用和精细的用药使人们需要寻找其他长期解决方案来解决糖尿病引起的血糖失调问题。包裹胰岛移植(EIT)是一种组织工程糖尿病解决方案。捐献的胰岛被包裹在半透性水凝胶中,允许氧气、葡萄糖和胰岛素扩散,但阻止白细胞浸润和抗体进入移植细胞。虽然 EIT 在小型动物模型中取得了成功,但由于需要长期使用全身性免疫抑制剂和持续的免疫排斥反应,因此距离商业化应用还很遥远。大多数已发表的研究都集中于调整胶囊材料的特性,以提高临床可行性。然而,大多数研究的范围仅限于生化变化。目前关于基质硬度对白细胞功能影响的机械生物学研究,尤其是巨噬细胞--异物反应(FBR)的主要协调者--显示了对组织工程疗法(如 EIT)定制有利反应的前景。在这篇综述中,我们将探讨提高 EIT 临床可行性的策略。在整个探讨过程中将简要概述免疫系统、FBR 和当前的生化方法。此外,我们还将提出将基质硬度作为胶囊设计参数以提高 EIT 疗效和临床可行性的论点。
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引用次数: 0
Small-Caliber Tissue-Engineered Vascular Grafts Based on Human-Induced Pluripotent Stem Cells: Progress and Challenges. 基于人诱导多能干细胞的小口径组织工程血管移植物:进展与挑战。
IF 6.4 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2023-08-01 DOI: 10.1089/ten.TEB.2023.0005
Junyi Ji, Hongju Xu, Chen Li, Jiesi Luo

Small-caliber tissue-engineered vascular grafts (TEVGs, luminal diameter <6 mm) are promising therapies for coronary or peripheral artery bypassing surgeries or emergency treatments of vascular trauma, and a robust seed cell source is required for scalable manufacturing of small-caliber TEVGs with robust mechanical strength and bioactive endothelium in future. Human-induced pluripotent stem cells (hiPSCs) could serve as a robust cell source to derive functional vascular seed cells and potentially lead to generation of immunocompatible engineered vascular tissues. Up to date, this rising field of small-caliber hiPSC-derived TEVG (hiPSC-TEVG) research has received increasing attention and achieved significant progress. Implantable, small-caliber, hiPSC-TEVGs have been generated. These hiPSC-TEVGs displayed rupture pressure and suture retention strength approaching to those of human native saphenous veins, with vessel wall decellularized and luminal surface endothelialized with monolayer of hiPSC-endothelial cells. Meanwhile, a series of challenges remain in this field, including functional maturity of hiPSC-derived vascular cells, poor elastogenesis, suboptimal efficiency of obtaining hiPSC-derived seed cells, and relative low ready availability of hiPSC-TEVGs, which are waiting to be addressed. This review is conceived to introduce representative achievements and challenges in small-caliber TEVG generation using hiPSCs, and encapsulate the potential solution and future directions.

小口径组织工程血管移植物(tevg),管腔直径
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引用次数: 0
Biomaterials for Tissue-Engineered Treatment of Tendinopathy in Animal Models: A Systematic Review. 动物模型中用于肌腱病变组织工程治疗的生物材料:系统综述。
IF 6.4 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2023-08-01 DOI: 10.1089/ten.TEB.2022.0178
Dijun Li, Guishan Wang, Jiarong Li, Lei Yan, Haifeng Liu, Jingwei Jiu, Xiaoke Li, Jiao Jiao Li, Bin Wang

To conduct a systematic review of studies reporting the treatment of tendon injury using biomaterials in animal models. A systematic search was conducted to retrieve studies involving animal models of tendon repair using biomaterials, in PubMed (database construction to August 2022) and Ovid-Embase (1946 to August 2022). Data related to tendon repair with biomaterials were extracted by two researchers, respectively. Risk of bias was assessed following the Cochrane Handbook for Systematic Reviews of Interventions. A statistical analysis was performed based on the classification of tendon repair biomaterials included in our study. A total of 8413 articles were retrieved, with 78 studies included in our analysis. For tendon repair in animal models using biomaterials, the most commonly seen characteristics were as follows: naturally derived biomaterials, rabbits and rats as animal models, surgery as the injury model, and the Achilles tendon as the injury site. The histology and biomechanical recovery of tendon injury following repair are affected by different biomaterials. Studies of tendon repair in animal models indicate that biomaterials can significantly improve repair outcomes, including tendon structure and biomechanics. Among effective biomaterial strategies are the use of new composites and incorporation of cells or growth factors into the material, both of which provide obvious benefits for tendon healing. More high-quality preclinical studies are required to encourage the translation of biomaterials into clinical practice for tendon repair.

对动物模型中使用生物材料治疗肌腱损伤的研究进行系统综述。系统检索PubMed(数据库构建至2022年8月)和Ovid-Embase(1946年至2022年8月)中涉及生物材料肌腱修复动物模型的研究。两位研究者分别提取了与生物材料肌腱修复相关的数据。根据Cochrane干预措施系统评价手册评估偏倚风险。根据纳入我们研究的肌腱修复生物材料的分类进行统计分析。共检索到8413篇文献,其中78篇纳入我们的分析。对于使用生物材料修复肌腱的动物模型,最常见的特点是:天然来源的生物材料,兔子和大鼠作为动物模型,手术作为损伤模型,跟腱作为损伤部位。不同的生物材料对肌腱损伤修复后的组织学和生物力学恢复有影响。动物模型肌腱修复研究表明,生物材料可以显著改善修复结果,包括肌腱结构和生物力学。有效的生物材料策略包括使用新的复合材料和在材料中加入细胞或生长因子,这两种方法都对肌腱愈合有明显的好处。需要更多高质量的临床前研究来鼓励生物材料转化为肌腱修复的临床实践。
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引用次数: 0
The Effect of Growth Factors on Vaginal Wound Healing: A Systematic Review and Meta-analysis. 生长因子对阴道伤口愈合的影响:系统回顾与元分析》。
IF 6.4 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2023-08-01 Epub Date: 2023-06-06 DOI: 10.1089/ten.TEB.2022.0225
Melissa J J van Velthoven, Aksel N Gudde, Frederique Struijs, Egbert Oosterwijk, Jan-Paul Roovers, Zeliha Guler, Carlijn R Hooijmans, Paul H J Kouwer

Surgical outcomes of pelvic organ prolapse (POP) surgery are poor, resulting in a 20% recurrence risk. Following the hypothesis that impaired wound healing is the main determinant of recurrent POP, growth factors have the potential to promote wound healing and may improve surgical outcomes. In this study, we systematically reviewed the effect of growth factors on vaginal wound healing in both in vitro and animal studies. For each independent comparison, the standardized mean difference and 95% CI were calculated using the Hedges' g correction. Of the 3858 retrieved studies, seven studies were included, of which six were included in meta-analysis (three in vitro studies and four in vivo studies). In vitro, basic fibroblast growth factor (bFGF) promotes proliferation, differentiation, and collagen types I and III production. Epidermal growth factor stimulates proliferation and connective tissue growth factor promotes Tenascin-C expression. These effects, however, are less pronounced in vivo; only bFGF slightly promotes collagen production. The review shows that growth factors, particularly bFGF, are able to promote vaginal wound healing in vitro. The uncertain in vivo findings suggest that preclinical models should be improved. The ultimate goal is to develop effective growth factor-supplemented therapies that improve surgical outcomes for POP.

盆腔器官脱垂(POP)手术的疗效不佳,导致 20% 的复发风险。根据伤口愈合受损是 POP 复发的主要决定因素这一假设,生长因子有可能促进伤口愈合,并改善手术效果。在本研究中,我们系统回顾了生长因子在体外和动物实验中对阴道伤口愈合的影响。对于每项独立比较,均采用 Hedges'g 校正法计算标准化平均差和 95% CI。在检索到的 3858 项研究中,共纳入了 7 项研究,其中 6 项纳入了荟萃分析(3 项体外研究和 4 项体内研究)。在体外,碱性成纤维细胞生长因子(bFGF)可促进增殖、分化以及 I 型和 III 型胶原蛋白的生成。表皮生长因子刺激增殖,结缔组织生长因子促进 Tenascin-C 的表达。但这些作用在体内并不明显,只有碱性生长因子能轻微促进胶原蛋白的生成。综述显示,生长因子,尤其是碱性成纤维细胞生长因子,能够在体外促进阴道伤口愈合。不确定的体内研究结果表明,临床前模型应加以改进。最终目标是开发出有效的生长因子辅助疗法,改善 POP 的手术效果。
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引用次数: 1
Rosalind Franklin Society Proudly Announces the 2022 Award Recipient for Tissue Engineering Part B: Reviews. 罗莎琳德·富兰克林协会自豪地宣布2022年组织工程B部分:评论奖获得者。
IF 6.4 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2023-08-01 DOI: 10.1089/ten.teb.2023.29020.rfs2022
Jennifer L Robinson
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引用次数: 0
Advances in Hypoxia-Inducible Factor-1α Stabilizer Deferoxamine in Tissue Engineering. 缺氧诱导因子-1α稳定剂去铁胺在组织工程中的研究进展。
IF 6.4 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2023-08-01 DOI: 10.1089/ten.TEB.2022.0168
Yanlin Zhu, Bei Chang, Yuxuan Pang, Huimin Wang, Yanmin Zhou

Deferoxamine (DFO) is an iron chelator with FDA approval for the clinical treatment of iron excess. As a well-established stabilizer of hypoxia-inducible factor-1α (HIF-1α), DFO can efficiently upregulate HIF-1α and relevant downstream angiogenic factors, leading to accelerated vascularization. Moreover, as increasing studies have focused on DFO as a hypoxia-mimetic agent in recent years, it has been shown that DFO exhibited multiple functions, including stem cell regulation, immunoregulation, provascularization, and pro-osteogenesis. On the contrary, DFO can bind excess iron ions in wounds of chronic inflammation, while serving as an antioxidant with the characteristic of removing reactive oxygen species. Collectively, these characteristics make DFO a potent modulator in tissue engineering for increasing tissue integration of biomaterials in vivo and facilitating wound healing. This review outlines the activity of DFO as a representative hypoxia-mimetic agent in cells as well as the evolution of its application in tissue engineering. It can be concluded that DFO is a medication with tremendous promise and application value in future trends, which can optimize biomaterials and existing tissue engineering techniques for tissue regeneration.

去铁胺(DFO)是一种铁螯合剂,经FDA批准用于临床治疗铁过量。DFO作为缺氧诱导因子-1α (HIF-1α)的稳定剂,可有效上调HIF-1α及相关下游血管生成因子,加速血管形成。此外,近年来越来越多的研究关注DFO作为一种模拟缺氧的药物,研究表明DFO具有多种功能,包括干细胞调节、免疫调节、血管扩张和促进成骨。相反,DFO可以结合慢性炎症伤口中多余的铁离子,同时具有去除活性氧的抗氧化剂作用。总的来说,这些特性使得DFO在组织工程中成为一种有效的调节剂,可以增加生物材料在体内的组织整合,促进伤口愈合。本文综述了DFO作为一种典型的模拟缺氧剂在细胞中的活性及其在组织工程中的应用进展。因此,DFO是一种具有巨大前景和应用价值的药物,可以优化生物材料和现有的组织工程技术,用于组织再生。
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引用次数: 0
Perspective in Achieving Stratified Articular Cartilage Repair Using Zonal Chondrocytes. 利用带状软骨细胞实现分层关节软骨修复的前景。
IF 6.4 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2023-06-01 DOI: 10.1089/ten.TEB.2022.0142
Ching Ann Tee, Jongyoon Han, Hoi Po James Hui, Eng Hin Lee, Zheng Yang

Articular cartilage is composed of superficial, medial, and deep zones, which endow the tissue with biphasic mechanical properties to withstand shearing force and compressional loading. The tissue has very limited self-healing capacity once it is damaged due to its avascular nature. To prevent the early onset of osteoarthritis, surgical intervention is often needed to repair the injured cartilage. Current noncell-based and cell-based treatments focus on the regeneration of homogeneous cartilage to achieve bulk compressional properties without recapitulating the zonal matrix and mechanical properties, and often oversight in aiding cartilage integration between host and repair cartilage. It is hypothesized that achieving zonal architecture in articular cartilage tissue repair could improve the structural and mechanical integrity and thus the life span of the regenerated tissue. Engineering stratified cartilage constructs using zonal chondrocytes have been hypothesized to improve the functionality and life span of the regenerated tissues. However, stratified articular cartilage repair has yet to be realized to date due to the lack of an efficient zonal chondrocyte isolation method and an expansion platform that would allow both cell propagation and phenotype maintenance. Various attempts and challenges in achieving stratified articular cartilage repair in a clinical setting are evaluated. In this review, different perspectives on achieving stratified articular cartilage repair using zonal chondrocytes are described. The effectiveness of different zonal chondrocyte isolation and zonal chondrocyte phenotype maintenance methodologies during expansion are compared, with the focus on recent advancements in zonal chondrocyte isolation and expansion that could present a possible strategy to overcome the limitation of applying zonal chondrocytes to facilitate zonal architecture development in articular cartilage regeneration. Impact Statement The zonal properties of articular cartilage contribute to the biphasic mechanical properties of the tissues. Recapitulation of the zonal architecture in regenerated articular cartilage has been hypothesized to improve the mechanical integrity and life span of the regenerated tissue. This review provides a comprehensive discussion on the current state of research relevant to achieving stratified articular cartilage repair using zonal chondrocytes from different perspectives. This review further elaborates on a zonal chondrocyte production pipeline that can potentially overcome the current clinical challenges and future work needed to realize stratified zonal chondrocyte implantation in a clinical setting.

关节软骨由浅层、中层和深层组成,使组织具有双相力学性能,能够承受剪切力和压缩载荷。由于其无血管的性质,组织一旦受损,其自我修复能力非常有限。为了防止早发性骨关节炎,通常需要手术干预来修复损伤的软骨。目前的非细胞和细胞治疗主要集中在均质软骨的再生上,以获得整体压缩性能,而不需要重现带状基质和力学性能,并且经常忽略了帮助宿主软骨和修复软骨之间的软骨整合。假设在关节软骨组织修复中实现带状结构可以提高结构和机械完整性,从而提高再生组织的寿命。使用带状软骨细胞的工程分层软骨结构已经被假设可以改善再生组织的功能和寿命。然而,由于缺乏有效的带状软骨细胞分离方法和允许细胞繁殖和表型维持的扩展平台,分层关节软骨修复迄今尚未实现。各种尝试和挑战在实现分层关节软骨修复在临床设置进行评估。在这篇综述中,不同的观点实现层状关节软骨修复使用带状软骨细胞进行了描述。本文比较了不同分区软骨细胞分离和分区软骨细胞表型维持方法在扩展过程中的有效性,重点介绍了分区软骨细胞分离和扩展的最新进展,这可能为克服应用分区软骨细胞促进关节软骨再生中分区结构发育的局限性提供了一种可能的策略。影响声明关节软骨的区域特性有助于组织的双相力学特性。在再生的关节软骨中,带状结构的再现被认为可以提高再生组织的机械完整性和寿命。本文综述了从不同角度对利用带状软骨细胞实现分层关节软骨修复的研究现状进行了全面的讨论。这篇综述进一步阐述了带状软骨细胞生产管道,可以潜在地克服当前的临床挑战,并在临床环境中实现分层带状软骨细胞植入所需的未来工作。
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引用次数: 1
Engineering Strategies to Move from Understanding to Steering Renal Tubulogenesis. 从理解到指导肾小管形成的工程策略。
IF 6.4 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2023-06-01 DOI: 10.1089/ten.TEB.2022.0120
Maria J Hagelaars, Laura Rijns, Patricia Y W Dankers, Sandra Loerakker, Carlijn V C Bouten

Rebuilding the kidney in the context of tissue engineering offers a major challenge as the organ is structurally complex and has a high variety of specific functions. Recreation of kidney function is inherently connected to the formation of tubules since the functional subunit of the kidney, the nephron, is based on tubular structures. In vivo, tubulogenesis culminates in a perfectly shaped, patterned, and functional renal tubule via different morphogenic processes that depend on delicately orchestrated chemical, physical, and mechanical interactions between cells and between cells and their microenvironment. This review summarizes the current understanding of the role of the microenvironment in the morphogenic processes involved in in vivo renal tubulogenesis. We highlight the current state-of-the-art of renal tubular engineering and provide a view on the design elements that can be extracted from these studies. Next, we discuss how computational modeling can aid in specifying and identifying design parameters and provide directions on how these design parameters can be incorporated in biomaterials for the purpose of engineering renal tubulogenesis. Finally, we propose that a step-by-step reciprocal interaction between understanding and engineering is necessary to effectively guide renal tubulogenesis. Impact statement Tubular tissue engineering lies at the foundation of regenerating kidney tissue function, as the functional subunit of the kidney, the nephron, is based on tubular structures. Guiding renal tubulogenesis toward functional renal tubules requires in-depth knowledge of the developmental processes that lead to the formation of native tubules as well as engineering approaches to steer these processes. In this study, we review the role of the microenvironment in the developmental processes that lead to functional renal tubules and give directions how this knowledge can be harnessed for biomaterial-based tubular engineering using computational models.

在组织工程的背景下,重建肾脏是一个重大的挑战,因为器官结构复杂,具有多种特定的功能。肾脏功能的恢复与肾小管的形成有着内在的联系,因为肾脏的功能亚单位肾元是基于肾小管结构的。在体内,肾小管的形成通过不同的形态形成过程,最终形成形状、图案和功能完美的肾小管,这些过程依赖于细胞之间以及细胞与微环境之间精细的化学、物理和机械相互作用。本文综述了目前对微环境在体内肾小管形成的形态发生过程中的作用的理解。我们强调了当前肾小管工程的最新技术,并提供了可以从这些研究中提取的设计元素的观点。接下来,我们将讨论计算建模如何帮助指定和识别设计参数,并就如何将这些设计参数纳入生物材料中以实现工程肾小管形成提供指导。最后,我们建议理解和工程之间的一步一步的相互作用是必要的,以有效地指导肾小管形成。肾管组织工程是肾组织功能再生的基础,肾的功能亚单位肾元是基于肾管结构的。引导肾小管向功能性肾小管的形成需要深入了解导致天然小管形成的发育过程,以及引导这些过程的工程方法。在本研究中,我们回顾了微环境在导致肾小管功能的发育过程中的作用,并给出了如何利用计算模型将这些知识用于基于生物材料的肾小管工程的方向。
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引用次数: 1
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