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Micromotors based on mesoporous silica tubes for thrombus therapy 用于血栓治疗的基于介孔二氧化硅管的微电机
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2024-03-07 DOI: 10.1680/jbibn.23.00005
Yuning Sun, Junfeng Zhu, Boqian Zhu, Jia Huang
To solve the problems of traditional drug carriers such as their single structure and lack of graded release, this work designs and synthesizes a kind of microporous–mesoporous silica tube (MST) with a macroporous and mesoporous structure. Then, manganese dioxide (MnO2) nanoparticles prepared using the hydrothermal method are embedded in the macropores to form an MST/Mn micromotor, which is then loaded with heparin and urokinase for thrombolytic therapy. The motion behavior of the micromotor is also investigated. Both static and dynamic thrombolytic therapy are detected, and the results indicate that a better thrombolytic effect can be observed on the MST/manganese micromotor with a motion ability compared with the samples without a motion ability. This research is expected to provide ideas for the design of more effective thrombus treatment agents.
为解决传统药物载体结构单一、缺乏梯度释放等问题,本研究设计并合成了一种具有大孔和介孔结构的微孔介孔二氧化硅管(MST)。然后,将水热法制备的二氧化锰(MnO2)纳米颗粒嵌入大孔中,形成 MST/Mn 微马达,再将其装载肝素和尿激酶用于溶栓治疗。此外,还对微电机的运动行为进行了研究。结果表明,与不具备运动能力的样品相比,具备运动能力的 MST/锰微电机具有更好的溶栓效果。这项研究有望为设计更有效的血栓治疗剂提供思路。
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引用次数: 0
Hydroxyapatite as an active ingredient in oral care: an international symposium report 羟基磷灰石作为口腔护理的有效成分:国际研讨会报告
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2023-12-06 DOI: 10.1680/jbibn.23.00034
Malgorzata Pawinska, Elzbieta Paszynska, Hardy Limeback, Bennett T Amaechi, Helge-Otto Fabritius, Bernhard Ganss, Kelsey O’Hagan-Wong, Erik Schulze zur Wiesche, Frederic Meyer, Joachim Enax
Hydroxyapatite, Ca5(PO4)3(OH), is a bio-inspired active ingredient for preventive oral health care. The use of hydroxyapatite in the prevention of oral diseases has gained, especially in recent years. Hydroxyapatite can be used in-office and for daily oral care (e.g., in toothpastes and mouthwashes). The first clinical efficacy studies on caries prevention and reduction of symptoms of dentin hypersensitivity were conducted in the 1980s. This was followed by various in vitro and in situ studies and several more recent clinical trials. A number of systematic reviews and meta-analyses on the use of hydroxyapatite in preventing oral health problems have been published. Summarizing these data, hydroxyapatite is a versatile active ingredient with multiple benefits that include caries prevention, relief from dentin hypersensitivity, and tooth whitening. Since this calcium phosphate mineral has an excellent biocompatibility, it is safe for all patient groups. This interdisciplinary review gives an overview of the developments in hydroxyapatite research, highlights the research progress made regarding hydroxyapatite as a biomimetic active ingredient, and summarizes the state-of-the-art evidence in support of hydroxyapatite efficacy.
羟基磷灰石,Ca5(PO4)3(OH),是一种生物启发活性成分,用于预防性口腔保健。特别是近年来,羟基磷灰石在口腔疾病预防中的应用越来越广泛。羟基磷灰石可用于办公室和日常口腔护理(如牙膏和漱口水)。20世纪80年代首次进行了预防龋齿和减轻牙本质过敏症状的临床疗效研究。随后进行了各种体外和原位研究以及最近的一些临床试验。许多关于羟基磷灰石在预防口腔健康问题中的应用的系统综述和荟萃分析已经发表。总结这些数据,羟基磷灰石是一种多功能的活性成分,具有多种益处,包括预防龋齿,缓解牙本质过敏和牙齿美白。由于这种磷酸钙矿物具有良好的生物相容性,因此对所有患者群体都是安全的。这篇跨学科综述综述了羟基磷灰石的研究进展,重点介绍了羟基磷灰石作为仿生活性成分的研究进展,并总结了支持羟基磷灰石疗效的最新证据。
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引用次数: 0
Effect of polyvinyl alcohol (PVA) weight ratio on spray dried apatite-PVA composites 聚乙烯醇(PVA)重量比对喷雾干燥磷灰石-PVA复合材料的影响
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2023-11-25 DOI: 10.1680/jbibn.23.00013
T Başargan, G Nasün-Saygili
Turkey has the largest colemanite reserves in the world, mainly used in glass and boric acid productions. In order to broaden the current applications of colemanite, it was previously transformed to apatite by a novel method within the same working group of the authors. Natural bone is an organic–inorganic composite where inorganic apatite crystals are accumulated on organic collagen fibers. With inspiration from nature, one further step was taken as an addition to the previous study: apatite, produced from colemanite, and Polyvinyl alcohol (PVA) were mixed with different weight ratios, and, then dried by a spray dryer to investigate the effect of PVA content on the composite structure and to see the effect of using a spray dryer on the morphology of the composites. The weight ratios of Apatite-PVA were maintained as 3:7, 5:5 and 8:2. Samples in each step were analyzed by XRD, FTIR, and SEM. It showed that spray dried Apatite-PVA composites were successfully synthesized and could be potential biomaterials. Using a spray dryer and the manipulation of the weight ratios of the Apatite-PVA were effective ways to tailor the particle size of the powder and the morphology of the particles, which could be beneficial for their biomedical usage.
土耳其拥有世界上最大的colemanite储量,主要用于玻璃和硼酸生产。为了拓宽目前colemanite的应用范围,作者在同一工作组内采用一种新方法将其转化为磷灰石。天然骨是一种有机-无机复合材料,无机磷灰石晶体积聚在有机胶原纤维上。在大自然的启发下,我们在之前的研究基础上又进行了进一步的研究:将由colemanite生产的磷灰石与聚乙烯醇(PVA)按不同的重量比混合,然后用喷雾干燥机进行干燥,研究PVA含量对复合材料结构的影响,并观察喷雾干燥机对复合材料形貌的影响。磷灰石-聚乙烯醇的质量比维持在3:7、5:5和8:2。采用XRD、FTIR、SEM对各步骤样品进行分析。结果表明,喷雾干燥磷灰石-聚乙烯醇复合材料制备成功,是一种有潜力的生物材料。使用喷雾干燥机和控制磷灰石-聚乙烯醇的重量比是调整粉末粒度和颗粒形态的有效方法,这可能有利于其生物医学用途。
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引用次数: 0
Carbon fiber polyether-etherketone reinforced polyvinyl alcohol composites for bone graft applications 骨移植用碳纤维聚醚醚酮增强聚乙烯醇复合材料
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2023-11-24 DOI: 10.1680/jbibn.23.00055
Namasivaya Naveen S.
Poly (vinyl alcohol) (PVA) is a synthetic, bioinert, semi-crystalline, biodegradable, non-toxic, and thermoplastic polymer extensively used in the field of biomedical engineering. On the other hand, weak mechanical properties of PVA such as low strength and young’s modulus limit its application as a bone implant. Therefore, PVA can be reinforced with a suitable material to improve its mechanical properties. Carbon fiber-polyetheretherketone (CF-PEEK) is a superior thermoplastic synthetic biomaterial with good tensile strength, stiffness, wear properties and X-ray translucence. In the present study, CF-PEEK reinforced PVA composites were prepared by varying the CF-PEEK (0%, 0.25%, 0.5%, 0.75%, 1%, 2%, 3% w/v) concentration in the PVA matrix (10% w/v) by solvent casting method. The physical, chemical, biological and mechanical properties of the prepared PVA-CF-PEEK composites were studied. The environmental scanning electron microscopy (ESEM) micrographs showed agglomeration of CF-PEEK at higher concentration i.e., 1%, 2%, 3% w/v. With the inclusion of CF-PEEK in PVA, the composites contact angle was found to be increased. The increased hydrophobicity of the samples resulted in reduced swelling and degradation rate. In the hemolysis study, the percentage hemolysis values were found to be <5% revealing the hemocompatible nature of the developed composites. An increase in in vitro protein adsorption was observed and cell viability studies showcased the biocompatible nature of the prepared composite samples. Thus, the developed CF-PEEK-PVA polymer composites present great potential for bone graft applications.
聚乙烯醇(PVA)是一种合成的、生物惰性的、半结晶的、可生物降解的、无毒的热塑性聚合物,广泛应用于生物医学工程领域。另一方面,聚乙烯醇的弱力学性能,如低强度和杨氏模量限制了其作为骨植入物的应用。因此,可以用合适的材料对PVA进行增强,以改善其力学性能。碳纤维聚醚醚酮(CF-PEEK)是一种优异的热塑性合成生物材料,具有良好的拉伸强度、刚度、耐磨性能和x射线半透明性。在PVA基体(10% w/v)中,采用溶剂浇铸法制备了CF-PEEK(0%、0.25%、0.5%、0.75%、1%、2%、3% w/v)浓度的CF-PEEK增强PVA复合材料。研究了聚乙烯醇-聚乙烯醇-聚醚醚酮复合材料的物理、化学、生物和力学性能。环境扫描电镜(ESEM)显示,在较高的浓度(1%、2%、3% w/v)下,CF-PEEK出现了团聚现象。在聚乙烯醇中加入CF-PEEK后,复合材料的接触角增大。样品的疏水性增加导致溶胀率和降解率降低。在溶血研究中,发现溶血百分比值为<5%,揭示了开发的复合材料的血液相容性。观察到体外蛋白质吸附的增加,细胞活力研究表明制备的复合样品具有生物相容性。因此,所开发的CF-PEEK-PVA聚合物复合材料在骨移植方面具有很大的应用潜力。
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引用次数: 0
Nanoparticle therapy for antibiotic-resistant bacteria: current methods and prospects 纳米颗粒治疗耐药细菌:目前的方法和前景
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2023-11-23 DOI: 10.1680/jbibn.22.00056
Tigabu M Bekele, Getachew A Alamnie, Abayneh Girma, Gedefaw B Mebratie
Emerging diseases due to antibiotic-resistant bacteria cause severe health concerns while increasing their negative effects on human health. The overuse or misuse of antimicrobial agents has contributed to the evolution of bacterial resistance to current medications. Bacteria can develop resistance by altering drugs, changing their target sites, forming biofilms and spending more time in the intracellular environment. Due to this, efforts are being made to create novel, alternative nanoantibiotics as a promising strategy to treat bacteria that cause disease and have developed resistance to a variety of drugs. Utilizing their biocidal properties, nanoparticles can be directed for medication delivery to particular tissues and employed as antibacterial agents against a range of illnesses. Targeted medication delivery-related toxicity problems may be solved with the aid of nanoencapsulation technology. This review paper generally provides a conceptual foundation for understanding the complexity of the problem of the development of antibiotic-resistant bacteria, particularly for brand-new synthetic antibiotics. This information will allow researchers to explore the use of nanoparticles in the treatment of multidrug-resistant bacteria.
由于耐抗生素细菌引起的新出现的疾病引起严重的健康问题,同时增加了它们对人类健康的负面影响。过度使用或误用抗菌药物导致细菌对当前药物产生耐药性。细菌可以通过改变药物、改变靶点、形成生物膜和在细胞内环境中停留更长时间来产生耐药性。正因为如此,人们正在努力创造新的、可替代的纳米抗生素,作为一种有希望的策略来治疗引起疾病并对多种药物产生耐药性的细菌。利用其生物杀灭特性,纳米颗粒可以直接用于将药物输送到特定组织,并用作对抗一系列疾病的抗菌剂。纳米胶囊化技术可以解决靶向给药相关的毒性问题。这篇综述为理解耐药细菌,特别是新型合成抗生素发展问题的复杂性提供了基本的概念基础。这一信息将使研究人员能够探索纳米颗粒在治疗耐多药细菌中的应用。
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引用次数: 0
Structural investigation of Amphibalanus amphitrite cement proteins: an in-silico study Amphibalanus amphiitrite水泥蛋白的结构研究:一项计算机研究
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2023-10-28 DOI: 10.1680/jbibn.23.00008
Mohammad Assadizadeh, Nima Goodarz, Amir Hossein Mahdavi Pak, Seyyed Mohammad Hasan Haghayeghi, Maryam Azimzadeh Irani
Balanomorpha, commonly known as barnacles, are leading biofouling animals belonging to subclass Cirripedia that adhere durably to different submerged surfaces by utilizing a chiefly-proteinaceous cement. According to prior experiments, adhesion is most likely made possible by the self-assembling aggregates reputed as amyloid-like nanofibers. The secreted cement contains numerous proteins among which CP19k and CP20k are thought to have a substantial influence on the adhesion process. The molecular configuration and atomistic interactions that result in this firm cement are not yet completely understood. Herein, AI-based structure prediction and molecular dockings were used to inspect the potential role of AaCP19k and AaCP20k-1 of Amphibalanus amphitrite in the formation of amyloid-like nanofibers. The anticipated structure of AaCP19k was highly accurate and its β-sandwich folding had a close resemblance to cross-β motifs found in amyloid nanofibers. In the AaCP19k, β1-2 and β7-8 act as oligomerization sites where stable dimers and trimers can be assembled. These modeled oligomerization interfaces point to the self-assembly site through which fibrillization might happen. The structural flexibility of AaCP20k-1 yielded low-accurate models, but a conserved β-hairpin and an α-helix were evident with high confidence. These structural properties can be employed in prospective studies to develop bioadhesives and design anti-fouling substances.
藤壶,通常被称为藤壶,是一种主要的生物黏附动物,属于藤壶亚纲,通过利用主要的蛋白质黏附物持久地附着在不同的水下表面。根据先前的实验,粘附最有可能是由被称为淀粉样纳米纤维的自组装聚集体实现的。分泌的水泥含有许多蛋白质,其中CP19k和CP20k被认为对粘附过程有重大影响。导致这种坚固水泥的分子结构和原子相互作用尚未完全了解。本文采用基于人工智能的结构预测和分子对接技术,研究了Amphibalanus amphitrite的AaCP19k和AaCP20k-1在淀粉样纳米纤维形成中的潜在作用。AaCP19k的预期结构非常精确,其β-三明治折叠与淀粉样蛋白纳米纤维中的交叉β基序非常相似。在AaCP19k中,β1-2和β7-8作为寡聚位点,可以组装稳定的二聚体和三聚体。这些模拟的寡聚化界面指向可能发生成纤维的自组装位点。AaCP20k-1的结构灵活性模型精度较低,但保守的β-发夹和α-螺旋具有较高的置信度。这些结构特性可用于前瞻性研究,以开发生物粘合剂和设计防污物质。
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引用次数: 0
Strategies of acellular graft scaffold approaches as alternatives to tissue regeneration 脱细胞支架移植方法替代组织再生的策略
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2023-10-10 DOI: 10.1680/jbibn.22.00072
Diana Sofía Nolasquez-Cruz, Héctor Flores, Amaury de Jesús Pozos-Guillen, Marco Antonio Alvarez-Perez
Autologous grafts represent the gold standard for regenerated tissues after diseases, trauma or defects. However, the main problems of this strategy are availability, donor site morbidity and postoperative complications. For this reason, a new approach in tissue engineering looks at scaffolds obtained through the decellularization of native extracellular matrices as an alternative technology to circumvent these limitations. Thus, this review aims to focus on the potential for use of acellular grafts, particularly on the methods of decellularization and recellularization, and continues with their application as part of the formulation of bioinks, which would represent a breakthrough in the field of biofabrication due to their naturally bioactive composition, preserving tissue architecture and structural integrity as a potential alternative for tissue regeneration.
自体移植物是疾病、创伤或缺陷后再生组织的金标准。然而,这种策略的主要问题是可用性、供区发病率和术后并发症。出于这个原因,组织工程中的一种新方法着眼于通过天然细胞外基质的脱细胞化获得支架,作为规避这些限制的替代技术。因此,本综述旨在关注脱细胞移植物的应用潜力,特别是脱细胞和再细胞方法,并继续将其作为生物墨水配方的一部分应用,这将是生物制造领域的一个突破,因为它们具有天然的生物活性成分,保留了组织结构和结构完整性,是组织再生的潜在替代方案。
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引用次数: 0
Nanostructured proteins for delivering drugs to diseased tissues 用于向病变组织输送药物的纳米结构蛋白质
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2023-08-07 DOI: 10.1680/jbibn.23.00004
Pemula Gowtham, V. Arumugam, Karthick Harini, P. Pallavi, Anbazhagan Thirumalai, K. Girigoswami, A. Girigoswami
During the last few years, nanostructures based on proteins have been playing a vital role in revolutionizing the nanomedicine era. Since protein nanoparticles are smaller and have a greater surface area, they retain a better capacity to interact with other molecules, resulting in carrying payloads efficiently to the diseased tissues. Besides having attractive biocompatibility and biodegradability, protein nanoparticles can also be modified on their surfaces. For the fabrication of these nanostructures, there are several processes involved, including emulsification, desolvation, a combination of complex coacervation, and electrospray. This can be achieved by using different proteins such as albumin, gelatin, elastin, gliadin, collagen, legumin, and zein, as well as a combination of these proteins. It is possible to functionalize protein nanoparticles by altering their internal and external interfaces so that they can encapsulate drugs, release them in a controlled manner, disassemble them systematically, and target tumors. This review highlights the physicochemical properties and engineering of several proteins to nano-dimensions used to deliver drugs to diseased tissues.
在过去的几年里,基于蛋白质的纳米结构在纳米医学时代的革命中发挥了至关重要的作用。由于蛋白质纳米颗粒更小,具有更大的表面积,它们保留了更好的与其他分子相互作用的能力,从而有效地将有效载荷携带到患病组织。蛋白质纳米粒子除了具有良好的生物相容性和生物降解性外,还可以在其表面进行改性。对于这些纳米结构的制造,涉及几个过程,包括乳化、去溶剂化、复合凝聚和电喷雾的组合。这可以通过使用不同的蛋白质来实现,例如白蛋白、明胶、弹性蛋白、醇溶蛋白、胶原、legumin和玉米醇溶蛋白,以及这些蛋白质的组合。通过改变蛋白质纳米颗粒的内部和外部界面,使其能够封装药物,以可控的方式释放药物,系统地分解药物,并靶向肿瘤,从而使其功能化是可能的。这篇综述重点介绍了几种用于将药物输送到病变组织的纳米蛋白质的物理化学性质和工程。
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引用次数: 0
Coupled experimental and theoretical study of hydroxyapatite ceramic 羟基磷灰石陶瓷的实验与理论耦合研究
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2023-07-14 DOI: 10.1680/jbibn.23.00007
O. Kribaa, Chams Edoha Labidi, H. Djouama, Lamia Laacher
Hydroxyapatite is a biomaterial that has a great importance in medical field, commonly used as implants to replace amputated bone, tissues, organ transplants and drug delivery systems. Quantum chemistry is based on functional theory (DFT), which is an important tool for understanding structural arrangements and explaining the Physico-chemical properties of complexes. This work is mainly based on synthesis of hydroxyapatite by double decomposition method, The fine powder has been characterized by different techniques such as infrared spectroscopy, X-ray diffraction method, scanning electron microscopy, and density measurement .The crystalline microstructure of hydroxyapatite is hexagonal with the following lattice parameters (a=b=9.4260 Å, c=6.8850 Å) and space group P63/m. A porous surface particle morphology with a regular spherical shape. An agreement of the energies of the vibrational frequency of bond that are characteristic of the IR spectrum. The geometry of complex isolated by the DFT method is optimized in open air and in various solvents; different functions are chosen in order to determine the energies of excitation and the forces of associated oscillator of studied complex. Theoretical absorption spectra were obtained using Gauss View software and the origin.
羟基磷灰石是一种在医学领域具有重要意义的生物材料,常被用作替代截肢骨、组织、器官移植和药物输送系统的植入物。量子化学是建立在泛函理论(DFT)的基础上的,泛函理论是理解配合物的结构排列和解释其物理化学性质的重要工具。本文主要采用双分解法制备了羟基磷灰石,通过红外光谱、x射线衍射、扫描电镜、密度测量等方法对粉体进行了表征。羟基磷灰石的晶体结构为六边形,晶格参数为(a=b=9.4260 Å, c=6.8850 Å),空间群为P63/m。有规则球形的多孔表面颗粒形态。键的振动频率能量的一致,是红外光谱的特征。在露天条件下和不同溶剂条件下,DFT方法分离的络合物的几何形状得到优化;选择不同的函数来确定所研究复合体的激振能和相关振子的力。利用Gauss View软件和原点得到理论吸收光谱。
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引用次数: 0
Book review 书评
4区 工程技术 Q4 ENGINEERING, BIOMEDICAL Pub Date : 2023-06-27 DOI: 10.1680/jbibn.23.00020
H. Limeback
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引用次数: 0
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Bioinspired Biomimetic and Nanobiomaterials
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