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Macromolecular modulation of a 3D hydrogel construct differentially regulates human stem cell tissue-to-tissue interface. 三维水凝胶结构的大分子调节差异调节人类干细胞组织-组织界面。
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112611
D. Pereira, J. Silva-Correia, J. Oliveira, R. Reis, A. Pandit
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引用次数: 4
Mineralized collagen as a bioactive ink to support encapsulation of human adipose stem cells: A step towards the future of bone regeneration. 矿化胶原蛋白作为生物活性墨水支持人类脂肪干细胞的封装:迈向未来骨再生的一步。
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112600
G. S. Diogo, Catarina F Marques, Sara Freitas-Ribeiro, C. G. Sotelo, R. Pérez-Martín, R. Pirraco, R. Reis, T. H. Silva
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引用次数: 2
Combination of GNRs-PEI/cGAMP-laden macrophages-based photothermal induced in situ tumor vaccines and immune checkpoint blockade for synergistic anti-tumor immunotherapy. 基于GNRs-PEI/ cgamp负载巨噬细胞的光热诱导原位肿瘤疫苗与免疫检查点阻断联合抗肿瘤免疫治疗
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112603
C. Jin, Yan Zhang, Guangxing Zhang, Bin Wang, Peiyan Hua
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引用次数: 0
Synthesis of curcumin-quaternized carbon quantum dots with enhanced broad-spectrum antibacterial activity for promoting infected wound healing. 姜黄素季铵化碳量子点的合成与广谱抗菌活性增强促进感染伤口愈合。
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112608
Lina Wu, Yaoran Gao, Chengfei Zhao, Dandan Huang, Wenxin Chen, Xinhua Lin, Ailin Liu, Liqing Lin
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引用次数: 10
Combination of multifunctional ursolic acid with kinase inhibitors for anti-cancer drug carrier vesicles 多功能熊果酸与激酶抑制剂联合用于抗癌药物载体囊泡
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112481
A. Lőrincz , J. Mihály , A. Wacha , Cs. Németh , B. Besztercei , P. Gyulavári , Z. Varga , I. Peták , A. Bóta

A sterically stabilized unilamellar nanocarrier vesicle (SSV) system containing dipalmitoylphosphatidylcholine, cholesterol, ursolic acid and PEGylated phospholipid has been developed by exploiting the structural advantages of ursolic acid: by spontaneously attaching to the lipid head groups, it induces curvature at the outer side of the bilayers, allowing the preparation of size-limited vesicles without extrusion. Ursolic acid (UA) also interacts with the PEG chains, supporting steric stabilization even when the amount of PEGylated phospholipid is reduced. Using fluorescence immunohistochemistry, vesicles containing ursolic acid (UA-SSVs) were found to accumulate in the tumor in 3 h on xenografted mouse, suggesting the potential use of these vesicles for passive tumor targeting.

Further on, mono- and combination therapy with UA and six different kinase inhibitors (crizotinib, erlotinib, foretinib, gefitinib, refametinib, trametinib) was tested on seven cancer cell-lines. In most combinations synergism was observed, in the case of trametinib even at very low concentration (0.001 μM), which targets the MAPK pathway most often activated in human cancers. The coupled intercalation of UA and trametinib (2:1 molar ratio) into vesicles causes further structural advantageous molecular interactions, promoting the formation of small vesicles. The high drug:lipid molar ratio (~0.5) in the novel type of co-delivery vesicles enables their direct medical application, possibly also overcoming the multidrug resistance effect.

利用熊果酸的结构优势,开发了一种含有双棕榈酰磷脂酰胆碱、胆固醇、熊果酸和聚乙二醇化磷脂的空间稳定单层纳米载体囊泡(SSV)系统:通过自发地附着在脂质头基团上,它在双层结构的外侧诱导曲率,允许制备尺寸有限的囊泡而无需挤压。熊果酸(UA)也与PEG链相互作用,即使在聚乙二醇化磷脂的量减少时也支持空间稳定。利用荧光免疫组化技术,发现含有熊果酸(uv - ssv)的囊泡在异种移植小鼠的肿瘤中蓄积3小时,提示这些囊泡可能用于被动靶向肿瘤。进一步,UA和六种不同的激酶抑制剂(克唑替尼、厄洛替尼、福替尼、吉非替尼、瑞法替尼、曲美替尼)的单一和联合治疗在7种癌细胞系上进行了测试。在大多数组合中,即使在极低浓度(0.001 μM)的情况下,曲美替尼也观察到协同作用,它靶向人类癌症中最常激活的MAPK途径。UA和曲美替尼(2:1摩尔比)耦合嵌入到囊泡中,进一步引起结构上有利的分子相互作用,促进小囊泡的形成。新型共递送囊泡的高药脂摩尔比(~0.5)使其能够直接应用于医学,也可能克服多药耐药效应。
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引用次数: 4
Injectable nanocomposite hydrogels as an emerging platform for biomedical applications: A review 可注射纳米复合水凝胶作为生物医学应用的新兴平台:综述
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112489
Amir Mellati , Elham Hasanzadeh , Mazaher Gholipourmalekabadi , Seyed Ehsan Enderami

Hydrogels have attracted much attention for biomedical and pharmaceutical applications due to the similarity of their biomimetic structure to the extracellular matrix of natural living tissues, tunable soft porous microarchitecture, superb biomechanical properties, proper biocompatibility, etc. Injectable hydrogels are an exciting type of hydrogels that can be easily injected into the target sites using needles or catheters in a minimally invasive manner. The more comfortable use, less pain, faster recovery period, lower costs, and fewer side effects make injectable hydrogels more attractive to both patients and clinicians in comparison to non-injectable hydrogels. However, it is difficult to achieve an ideal injectable hydrogel using just a single material (i.e., polymer). This challenge can be overcome by incorporating nanofillers into the polymeric matrix to engineer injectable nanocomposite hydrogels with combined or synergistic properties gained from the constituents. This work aims to critically review injectable nanocomposite hydrogels, their preparation methods, properties, functionalities, and versatile biomedical and pharmaceutical applications such as tissue engineering, drug delivery, and cancer labeling and therapy. The most common natural and synthetic polymers as matrices together with the most popular nanomaterials as reinforcements, including nanoceramics, carbon-based nanostructures, metallic nanomaterials, and various nanosized polymeric materials, are highlighted in this review.

水凝胶具有与天然活组织细胞外基质相似的仿生结构、可调节的软孔微结构、优异的生物力学性能和良好的生物相容性等特点,在生物医学和制药领域受到广泛关注。可注射水凝胶是一种令人兴奋的水凝胶类型,它可以用针或导管以微创的方式轻松地注射到目标部位。与非注射水凝胶相比,使用更舒适、疼痛更少、恢复期更快、成本更低、副作用更少,使得可注射水凝胶对患者和临床医生更具吸引力。然而,仅使用一种材料(即聚合物)很难获得理想的可注射水凝胶。通过在聚合物基质中加入纳米填料,设计可注射的纳米复合水凝胶,使其具有组合或协同性能,可以克服这一挑战。这项工作的目的是严格审查可注射纳米复合水凝胶,他们的制备方法,性质,功能,和多功能生物医学和制药应用,如组织工程,药物输送,癌症标记和治疗。本文重点介绍了最常见的天然和合成聚合物作为基体,以及最流行的纳米材料作为增强材料,包括纳米陶瓷、碳基纳米结构、金属纳米材料和各种纳米聚合物材料。
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引用次数: 41
Multifunctional 3D printed porous GelMA/xanthan gum based dressing with biofilm control and wound healing activity 多功能3D打印多孔凝胶/黄原胶基敷料,具有生物膜控制和伤口愈合活性
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112493
Zhenming Yang , Xuehong Ren , Yu Liu

Bacterial infections are the major challenges of wound treatment in current clinical applications. In this study, Three-dimensional (3D) antibacterial wound dressing has been fabricated via introducing N-halamine/TiO2 to gelatin methacrylate and xanthan gum. The prepared 3D printed dressings showed ideal swelling ratio and excellent water uptake efficiency. TiO2 nanoparticles were introduced by in-situ to improve the ultraviolet stability of N-halamines. The 3D printed GX2-TiO2-PSPH-Cl prepared dressings containing titanium dioxide retained 0.19% active chlorine after ultraviolet irradiation for 20 min, which was much higher than that of N-halamine dressings without the addition of TiO2. The 3D printed dressings showed good antibacterial activity, and 100% of Escherichia coli O157:H7 and Staphylococcus aureus were inactivated after 60 min of contact. Furthermore, the biofilm test indicated that the 3D antibacterial dressings were able to inhibit the formation of bacterial biofilm. The 3D printed dressings possess outstanding biocompatibility. Moreover, in vivo data demonstrated that the 3D printed dressings could significantly accelerate wound healing in a mouse model, indicating that the developed 3D printed dressings are ideal candidates for wound treatment.

细菌感染是目前临床应用中伤口治疗的主要挑战。在本研究中,将N-halamine/TiO2引入到明胶甲基丙烯酸酯和黄原胶中制备了三维(3D)抗菌伤口敷料。制备的3D打印敷料具有理想的溶胀率和良好的吸水效率。通过原位引入TiO2纳米粒子,提高n-卤胺的紫外稳定性。3D打印GX2-TiO2-PSPH-Cl制备的含二氧化钛敷料在紫外线照射20 min后,活性氯保留率为0.19%,远高于未添加TiO2的N-halamine敷料。3D打印敷料具有良好的抗菌活性,接触60min后,100%的大肠杆菌O157:H7和金黄色葡萄球菌灭活。此外,生物膜试验表明,3D抗菌敷料能够抑制细菌生物膜的形成。3D打印敷料具有出色的生物相容性。此外,体内数据表明,3D打印敷料可以显著加速小鼠模型的伤口愈合,这表明所开发的3D打印敷料是伤口治疗的理想候选者。
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引用次数: 23
Magnetically retained and glucose-fueled hydroxyl radical nanogenerators for H2O2-self-supplying chemodynamic therapy of wound infections 磁保留和葡萄糖燃料羟基自由基纳米发电机用于h2o2自供化学动力学治疗伤口感染
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112522
Minhui Gong , Jiayu Xiao , Huan Li , Luo Hai , Ke Yang , Junqin Li , Zefeng Wang , Le Deng , Dinggeng He

Chemodynamic therapy (CDT) involving the highly toxic hydroxyl radical (OH) has exhibited tremendous potentiality in combating bacterial infection. However, its antibacterial efficacy is still unsatisfactory due to the insufficient H2O2 levels and near neutral pH at infection site. Herein, a glucose-fueled and H2O2-self-supplying OH nanogenerator (pFe3O4@GOx) based on cascade catalytic reactions is developed by immobilizing glucose oxidase (GOx) on the surface of PAA-coated Fe3O4 (pFe3O4). Magnetic pFe3O4 can act as a horseradish peroxidase-like nanozyme, catalyzing the decomposition of H2O2 into OH under acidic conditions for CDT. The immobilized GOx can continuously convert non-toxic glucose into gluconic acid and H2O2, and the former improves the catalytic activity of pFe3O4 nanozymes by decreasing pH value. The self-supplying H2O2 molecules effectively enhance the OH generation, resulting in the high antibacterial efficacy. In vitro studies demonstrate that the pFe3O4@GOx conducts well in reducing pH value and improving H2O2 level for self-enhanced CDT. Moreover, the cascade catalytic reaction of pFe3O4 and GOx effectively avoids strong toxicity caused by directly adding high concentrations of H2O2 for CDT. It is worth mentioning that the pFe3O4@GOx performs highly efficient in vivo CDT of bacteria-infected wound via the localized long-term magnetic retention at infection site and causes minimal toxicity to normal tissues at therapeutic doses. Therefore, the developed glucose-fueled OH nanogenerators are a potential nano-antibacterial agent for the treatment of wound infections.

化学动力疗法(CDT)涉及高毒性羟基自由基(OH)在对抗细菌感染方面显示出巨大的潜力。然而,由于感染部位H2O2水平不足,pH接近中性,其抗菌效果仍不理想。本文通过将葡萄糖氧化酶(GOx)固定在paa包覆的Fe3O4 (pFe3O4)表面,开发了基于级联催化反应的葡萄糖燃料和h2o2自供的OH纳米发电机(pFe3O4@GOx)。磁性pFe3O4可以作为类似辣根过氧化物酶的纳米酶,在酸性条件下催化H2O2分解成OH进行CDT。固定化的GOx可以连续地将无毒葡萄糖转化为葡萄糖酸和H2O2,葡萄糖酸通过降低pH值提高pFe3O4纳米酶的催化活性。自供H2O2分子有效增强OH生成,抗菌效果高。体外研究表明,pFe3O4@GOx在降低pH值和提高H2O2水平方面具有较好的自增强CDT的作用。此外,pFe3O4与GOx的级联催化反应有效避免了直接加入高浓度H2O2对CDT产生的强毒性。值得一提的是,pFe3O4@GOx通过在感染部位的局部长期磁保留,对细菌感染的伤口进行高效的体内CDT,并且在治疗剂量下对正常组织的毒性很小。因此,开发的葡萄糖燃料氢氧根纳米发生器是治疗伤口感染的潜在纳米抗菌剂。
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引用次数: 19
A multifunctional antibacterial and self-healing hydrogel laden with bone marrow mesenchymal stem cell-derived exosomes for accelerating diabetic wound healing. 一种含有骨髓间充质干细胞衍生外泌体的多功能抗菌和自愈水凝胶,用于加速糖尿病伤口愈合。
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112613
Xin Geng, Ye Qi, Xintong Liu, Yijie Shi, Hong-dan Li, Liang Zhao
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引用次数: 39
Thermosensitive hydrogel-functionalized gold nanorod/mesoporous MnO2 nanoparticles for tumor cell-triggered drug delivery 热敏水凝胶功能化金纳米棒/介孔二氧化锰纳米颗粒用于肿瘤细胞触发的药物递送
IF 7.9 1区 工程技术 Q1 MATERIALS SCIENCE, BIOMATERIALS Pub Date : 2021-12-01 DOI: 10.1016/j.msec.2021.112504
Zheng Zhang , Yuanhui Ji , Chengqi Lin , Li Tao

MnO2 owns distinct redox, imaging, and degradable properties corresponding to the tumor microenvironment. However, the onefold structure and non-modifiable property cause many obstacles to anticancer applications. In this report, we first prepared a typical core-shell gold nanorod (GNR)/manganese dioxide (MnO2) nanoparticles (GNR/MnO2 NPs). Interestingly, the MnO2 had a mesoporous channel and modifiable hydroxyl group (OH). Here, the unique ‘OH’ groups were modified and further grafted with poly(N-isopropylacrylamide-co-acrylic acid) (PNA). As a dual-sensitive hydrogel, it was selected as the thermal/pH-sensitive component in the hybrid nanoparticles (GNR/MnO2/PNA NPs). The anticancer drug doxorubicin hydrochloride (DOX) was selected and loaded into the hybrid nanoparticles (GNR/MnO2/PNA-DOX NPs). The GNR/MnO2/PNA NPs achieved satisfying drug-loading efficiency and glutathione (GSH)/pH/thermal-responsive drug-controlled release. As a side benefit, the GNR/MnO2/PNA NPs showed potential as excellent near-infrared (NIR)-excited nanoplatforms for photothermal therapy (PTT). Delightedly, the studies demonstrated that the GNR/MnO2/PNA-DOX NPs showed a noticeable killing effect on tumor cells, whether it is tumor cell-triggered drug release or photothermal effect. Besides, it not only could enhance mitochondrial damage but also could inhibit the migration and invasion of tumor cells. Quite the reverse, it had little negative impact on normal cells. The feature can prevent anticancer drugs and nanoparticles from killing normal cells. Consequently, GNR/MnO2/PNA NPs have potential applications in drug delivery and synergistic therapy due to these advantageous features.

MnO2具有与肿瘤微环境相对应的氧化还原、成像和降解特性。然而,单一化结构和不可修饰性给抗癌应用带来了诸多障碍。本文首先制备了一种典型的核壳型金纳米棒(GNR)/二氧化锰(MnO2)纳米颗粒(GNR/MnO2 NPs)。有趣的是,二氧化锰具有介孔通道和可修饰的羟基(OH)。在这里,独特的“OH”基团被修饰并进一步接枝聚(n -异丙基丙烯酰胺-共丙烯酸)(PNA)。作为一种双敏感水凝胶,它被选择作为混合纳米粒子(GNR/MnO2/PNA NPs)的热/ ph敏感成分。选择抗癌药物盐酸多柔比星(DOX)并将其装载到混合纳米颗粒(GNR/MnO2/PNA-DOX NPs)中。GNR/MnO2/PNA NPs具有良好的载药效率和谷胱甘肽(GSH)/pH/热响应性药物控释。另一方面,GNR/MnO2/PNA NPs显示出作为光热治疗(PTT)的近红外(NIR)激发纳米平台的潜力。令人欣喜的是,研究表明GNR/MnO2/PNA-DOX NPs对肿瘤细胞具有明显的杀伤作用,无论是肿瘤细胞触发的药物释放还是光热效应。此外,它不仅能增强线粒体损伤,还能抑制肿瘤细胞的迁移和侵袭。恰恰相反,它对正常细胞几乎没有负面影响。这种特性可以防止抗癌药物和纳米颗粒杀死正常细胞。因此,由于这些优势特性,GNR/MnO2/PNA NPs在药物传递和协同治疗方面具有潜在的应用前景。
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引用次数: 8
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