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Effect of ohmic heating-assisted glycation reaction on the properties of soybean protein isolate-chitosan complexes. 欧姆加热辅助糖化反应对大豆分离蛋白壳聚糖复合物性质的影响
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137859
Yuting Wang, Ning Wang, Boyu Liu, Cuiping Han, Tong Wang, Mingzhe Pan, Dianyu Yu

The purpose of this study was to investigate the progress of glycation reaction reactions by conventional heating and ohmic heating (OH) treatment, and the effect of different electric field intensities on the structure, physical and chemical and functional properties of glycosylated proteins. The findings demonstrated that OH treatment was more efficacious than conventional heating in reducing the free amino group and increasing the absorbance at 420 nm. Concurrently, the α-helix and β-sheet content of soy protein isolate (SPI)-chitosan (CS) complexes exhibited a reduction to 18.01 % and 28.67 %, respectively, while the UV absorption peak demonstrated an increase in conjunction with the escalation of electric field intensity. When the electric field intensity was 6 V/cm, the emulsification activity index and emulsion stability index of SPI-CS complexes were found to be 95.52 m2/g and 55.60 min, respectively. The foaming capacity and foaming stability were found to be 148.33 % and 115.59 % respectively, while the solubility was also up to 91.37 %. Additionally, the air/water interface properties demonstrated a notable enhancement. The functional properties of the complexes were demonstrably enhanced following the application of an OH treatment. The aforementioned statement provided a theoretical foundation for the implementation of OH treatment.

本研究旨在探讨传统加热和欧姆加热(OH)处理糖化反应的进展,以及不同电场强度对糖基化蛋白质的结构、理化和功能特性的影响。研究结果表明,在减少游离氨基和提高 420 纳米吸光度方面,欧姆加热处理比传统加热更有效。同时,大豆分离蛋白(SPI)-壳聚糖(CS)复合物中的α-螺旋和β-片含量分别降低到18.01%和28.67%,而紫外吸收峰则随着电场强度的增加而增加。当电场强度为 6 V/cm 时,SPI-CS 复合物的乳化活性指数和乳化稳定性指数分别为 95.52 m2/g 和 55.60 min。发泡能力和发泡稳定性分别为 148.33 % 和 115.59 %,溶解度也高达 91.37 %。此外,空气/水界面特性也有显著提高。经 OH 处理后,复合物的功能特性明显增强。上述论述为实施 OH 处理提供了理论基础。
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引用次数: 0
Combining in silico and in vitro approaches for understanding the mechanism of action of the galactomannan extracted from Cassia grandis seeds against colorectal cancer. 结合硅学和体外方法了解从决明子中提取的半乳甘露聚糖抗结直肠癌的作用机制。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137909
Priscilla Barbosa Sales de Albuquerque, Letícia Francine Silva Ramos, Maria Isabel Jéssica da Silva Dantas, Filipe de Santana Othmar, João Marcos Galúcio, Kauê Santana da Costa, Moan Jéfter Fernandes Costa, Natalie Emanuelle Ribeiro Rodrigues, Luiza Rayanna Amorim de Lima, Pedro Henrique Sette-de-Souza

This study aimed to investigate the antitumor activity of galactomannan extracted from Cassia grandis seeds (GCg) against colorectal cancer cells using both experimental and computational approaches. Galactomannan was extracted from C. grandis seeds and prepared into solutions with varying concentrations. The cytotoxicity of these solutions was tested on HT-29 and HCT-116 colorectal cancer cell lines using the MTT assay. Additionally, computational evaluations, including molecular docking and molecular dynamics simulations, were performed to explore the potential binding interactions of GCg with cyclin-dependent kinase 2 (CDK2). The experimental results demonstrated that GCg significantly inhibited the proliferation of HT-29 cells, especially at concentrations of 5 mg/mL. On the other hand, no concentration inhibited >30 % of HCT-116 cells. Computational analysis revealed that GCg could bind to the ATP-binding site of CDK2, promoting the inactive DFG-out conformation, similar to the known inhibitor K03861. This interaction suggests a mechanism through which GCg may exert its anticancer effects. GCg exhibits significant cytotoxic activity against HT-29 colorectal adenocarcinoma cells, likely through the inhibition of CDK2; however, its efficacy against HCT-116 cells is limited, possibly due to structural differences in the molecular targets. To the best of the authors' knowledge, no studies have explored the applications of GCg in cancers, particularly colorectal ones. Further studies are needed to explore the antimetastatic effects and potential clinical applications of GCg in colorectal cancer treatment.

本研究旨在利用实验和计算方法研究从决明子种子(GCg)中提取的半乳甘露聚糖对结直肠癌细胞的抗肿瘤活性。研究人员从决明子中提取了半乳甘露聚糖,并将其配制成不同浓度的溶液。采用 MTT 法测试了这些溶液对 HT-29 和 HCT-116 大肠癌细胞株的细胞毒性。此外,还进行了计算评估,包括分子对接和分子动力学模拟,以探索 GCg 与细胞周期蛋白依赖性激酶 2(CDK2)的潜在结合相互作用。实验结果表明,GCg 能显著抑制 HT-29 细胞的增殖,尤其是在浓度为 5 毫克/毫升时。另一方面,任何浓度的 GCg 对 HCT-116 细胞的抑制率都不超过 30%。计算分析表明,GCg 可与 CDK2 的 ATP 结合位点结合,促进无活性的 DFG-out 构象,与已知的抑制剂 K03861 相似。这种相互作用提示了 GCg 发挥抗癌作用的机制。GCg 对 HT-29 大肠腺癌细胞具有显著的细胞毒性活性,可能是通过抑制 CDK2 实现的;但它对 HCT-116 细胞的疗效有限,这可能是由于分子靶点的结构差异造成的。据作者所知,目前还没有研究探讨过 GCg 在癌症(尤其是结直肠癌)中的应用。需要进一步研究探讨 GCg 在结直肠癌治疗中的抗转移作用和潜在临床应用。
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引用次数: 0
A review of exploring the synthesis, properties, and diverse applications of poly lactic acid with a focus on food packaging application. 综述聚乳酸的合成、特性和各种应用,重点是食品包装应用。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137905
C S Reshma, S Remya, J Bindu

Polylactic acid (PLA) is an aliphatic polyester, which is primarily synthesized from renewable resources through the polycondensation or ring-opening polymerization of lactic acid (LA)/lactide. LA can be conveniently produced via the fermentation of sugars obtained from renewable sources such as corn and sugar cane. Due to its biodegradable and biocompatible nature, PLA exhibits a vast range of applications. Its advantages include non-toxicity, environmental safety, and compatibility with human biological systems. PLA finds significant use in various biomedical applications, including implants, tissue engineering, sutures, and drug delivery systems. Additionally, PLA serves as a renewable and biodegradable polymer of extensive utility in film production, offering an alternative to petrochemical-based polymers. Moreover, the properties of PLA-based films can be tailored by incorporating extracts, polysaccharides, proteins, and nano-particles. This review encompasses LA production, PLA synthesis, and diverse applications of PLA and further explores the potential of PLA in the realm of packaging.

聚乳酸(PLA)是一种脂肪族聚酯,主要通过乳酸(LA)/内酯的缩聚或开环聚合从可再生资源中合成。通过发酵从玉米和甘蔗等可再生资源中获得的糖,可以方便地生产出 LA。由于聚乳酸具有生物降解性和生物相容性,其应用范围十分广泛。其优点包括无毒性、环境安全性以及与人体生物系统的兼容性。聚乳酸在各种生物医学应用中都有重要用途,包括植入物、组织工程、缝合线和给药系统。此外,聚乳酸是一种可再生、可生物降解的聚合物,在薄膜生产中用途广泛,是石化基聚合物的替代品。此外,还可以通过加入提取物、多糖、蛋白质和纳米颗粒来定制聚乳酸薄膜的特性。本综述涵盖了聚乳酸的生产、合成和各种应用,并进一步探讨了聚乳酸在包装领域的潜力。
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引用次数: 0
Formation mechanism and stability of ternary nanoparticles based on Mesona chinensis polysaccharides-walnut protein hydrolysates for icariin delivery. 基于 Mesona chinensis 多糖-核桃蛋白水解物的三元纳米颗粒的形成机制和稳定性,用于冰片苷的输送。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137913
Jinping Wang, Huimin Bi, Jucai Xu, Xuesong Zhou, Bao Yang, Lingrong Wen

Polysaccharide-protein complexes have proven to be effective nano-carrier with high stability. In this work, walnut protein hydrolysates (WPH) prepared through limited enzymolysis were considered as encapsulation carriers to solve the limited water solubility and bioavailability of icariin, a bioactive compound in functional foods. The pH-driven method was employed to prepare WPH-icariin nanoparticles (WPHI). Their characterization, formation, digestive properties, and immunomodulatory activity were investigated. The results showed that WPHI possessed superior encapsulation efficiency (82.35 %) and loading capacity (137.2 μg/mg) for icariin. Its water solubility (1647 μg/mL) and bioavailability (94.86 %) were significantly improved, by over 80 and 30 times, respectively. The combination of WPH with icariin resulted in the formation of irregular lamellar structure through hydrophobic, electrostatic, and disulfide bonds interactions. Moreover, WPHI demonstrated significant immunomodulatory activity, and thermal and digestive stabilities (> 93 %), but extremely poor pH and salt tolerance. To address these issues, Mesona chinensis polysaccharide (MCP)-WPHI was prepared. The incorporation of MCP significantly improved the physicochemical stability of nanoparticles. Compared to WPHI, MCP-WPHI showed improved pH, thermal, salt tolerance (0-250 mM), and storage stability. This study expanded the application of WPH and MCP in delivering icariin while providing new insights for developing multifunctional high-nutritional-quality food ingredients.

多糖-蛋白质复合物已被证明是具有高稳定性的有效纳米载体。本研究将通过有限酶解制备的核桃蛋白水解物(WPH)作为封装载体,以解决功能食品中生物活性化合物冰片苷的水溶性和生物利用度有限的问题。采用 pH 驱动法制备了 WPH-icariin 纳米粒子(WPHI)。研究了它们的特征、形成、消化特性和免疫调节活性。结果表明,WPHI 对冰片霉素具有优异的包封效率(82.35%)和负载能力(137.2 μg/mg)。其水溶性(1647 μg/mL)和生物利用度(94.86 %)也有显著提高,分别提高了 80 多倍和 30 多倍。通过疏水、静电和二硫键相互作用,WPH 与 icariin 的结合形成了不规则的片状结构。此外,WPHI 还具有显著的免疫调节活性、热稳定性和消化稳定性(大于 93%),但对 pH 和盐的耐受性极差。为了解决这些问题,我们制备了中脉多糖(MCP)-WPHI。MCP 的加入大大提高了纳米颗粒的理化稳定性。与 WPHI 相比,MCP-WPHI 在 pH 值、热稳定性、耐盐性(0-250 mM)和贮存稳定性方面均有改善。这项研究拓展了 WPH 和 MCP 在递送冰醋酸方面的应用,同时也为开发多功能高营养优质食品配料提供了新的见解。
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引用次数: 0
Itaconic acid/cellulose-based hydrogels with fire-resistant and anti-freezing properties via vat photopolymerization 3D printing. 通过大桶光聚合三维打印技术获得具有防火和抗冻性能的衣康酸/纤维素基水凝胶。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137911
Xiaoling Zuo, Runhao Yu, Rong Li, Mengping Xu, Chuan Liu, Kangan Hao, Ying Zhou, Anrong Huang, Chong Wu, Zhonglin Cao, Jianbing Guo, Yinye Yang

Hydrogel-born materials have garnered significant interest due to their inherent flame retardant properties and eco-friendly characteristics. In light of the diminishing petroleum reserves and the escalating environmental challenges, there is an urgent impetus to exploit high-value applications of naturally occurring resources and to advance research in sustainable manufacturing technologies. In this vein, we describe an innovative and sustainable methodology for the development and production of flame-retardant hydrogels. This approach perfectly integrates renewable itaconic acid and cellulose derivatives with rapid vat photopolymerization (VP) 3D printing technology, which affords a green and efficient route for materials processing. Specifically, the biomass-based ink formulated for 3D printing demonstrates excellent visible-light curing properties, achieving a maximum double-bond conversion of 45.3 % within 10 min of exposure to visible-light LED under ambient conditions. Moreover, the resultant 3D-printed biomass-based hydrogels exhibit commendable flame-retardant performance, as evidenced by a V-0 flammability rating and a Limiting Oxygen Index (LOI) value of 60.2 %. They also possess desirable mechanical attributes (95.2 kPa) and exceptional thermal stability, enduring high temperatures for up to 12 min. Notably, these hydrogels exhibit remarkable freeze tolerance, maintaining their functionality even at profoundly low temperatures. This study demonstrates a novel strategy for the design and production of flame-retardant materials, contributing to the pursuit of green sustainability.

水凝胶材料因其固有的阻燃性能和环保特性而备受关注。鉴于石油储量的不断减少和环境挑战的不断升级,开发天然资源的高价值应用和推进可持续制造技术的研究迫在眉睫。为此,我们介绍了一种用于开发和生产阻燃水凝胶的创新型可持续方法。这种方法将可再生衣康酸和纤维素衍生物与快速大桶光聚合(VP)3D 打印技术完美地结合在一起,为材料加工提供了一条绿色高效的途径。具体而言,为三维打印配制的生物质基墨水具有出色的可见光固化特性,在环境条件下暴露于可见光 LED 10 分钟内,最大双键转换率达到 45.3%。此外,3D 打印出的生物质水凝胶还具有值得称赞的阻燃性能,其阻燃等级为 V-0,极限氧指数(LOI)值为 60.2%。它们还具有理想的机械属性(95.2 kPa)和优异的热稳定性,可在高温下工作长达 12 分钟。值得注意的是,这些水凝胶表现出卓越的耐冻性,即使在极低的温度下也能保持其功能。这项研究展示了一种设计和生产阻燃材料的新策略,有助于实现绿色可持续发展。
{"title":"Itaconic acid/cellulose-based hydrogels with fire-resistant and anti-freezing properties via vat photopolymerization 3D printing.","authors":"Xiaoling Zuo, Runhao Yu, Rong Li, Mengping Xu, Chuan Liu, Kangan Hao, Ying Zhou, Anrong Huang, Chong Wu, Zhonglin Cao, Jianbing Guo, Yinye Yang","doi":"10.1016/j.ijbiomac.2024.137911","DOIUrl":"https://doi.org/10.1016/j.ijbiomac.2024.137911","url":null,"abstract":"<p><p>Hydrogel-born materials have garnered significant interest due to their inherent flame retardant properties and eco-friendly characteristics. In light of the diminishing petroleum reserves and the escalating environmental challenges, there is an urgent impetus to exploit high-value applications of naturally occurring resources and to advance research in sustainable manufacturing technologies. In this vein, we describe an innovative and sustainable methodology for the development and production of flame-retardant hydrogels. This approach perfectly integrates renewable itaconic acid and cellulose derivatives with rapid vat photopolymerization (VP) 3D printing technology, which affords a green and efficient route for materials processing. Specifically, the biomass-based ink formulated for 3D printing demonstrates excellent visible-light curing properties, achieving a maximum double-bond conversion of 45.3 % within 10 min of exposure to visible-light LED under ambient conditions. Moreover, the resultant 3D-printed biomass-based hydrogels exhibit commendable flame-retardant performance, as evidenced by a V-0 flammability rating and a Limiting Oxygen Index (LOI) value of 60.2 %. They also possess desirable mechanical attributes (95.2 kPa) and exceptional thermal stability, enduring high temperatures for up to 12 min. Notably, these hydrogels exhibit remarkable freeze tolerance, maintaining their functionality even at profoundly low temperatures. This study demonstrates a novel strategy for the design and production of flame-retardant materials, contributing to the pursuit of green sustainability.</p>","PeriodicalId":333,"journal":{"name":"International Journal of Biological Macromolecules","volume":" ","pages":"137911"},"PeriodicalIF":7.7,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142692321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Purification and characterization of a protease produced by submerged fermentation: Ultrasound-enhanced collagenolytic protease from Streptomyces parvulus. 通过浸没式发酵产生的蛋白酶的纯化和特性:来自副荚膜链霉菌的超声波增强胶原蛋白溶解蛋白酶。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137749
Raphael Luiz Andrade Silva, Maria Ercilia Barreiro, Kétura Rhammá Cavalcante Ferreira, Kethylen Barbara Barbosa Cardoso, Anna Gabrielly Duarte Neves, Maria Eduarda L C Miranda, Juanize Matias Batista, Thiago Pajeú Nascimento, Thiago Barbosa Cahú, Ranilson de Souza Bezerra, Ana Lucia F Porto, Romero M P Brandão-Costa

Proteases are a large group of enzymes in high demand due to their wide and different biotechnological applications mainly in the biomedical field. Ultrasound (US) has been used successfully in several Bioprocesses in biotechnology, such as in the upregulation of enzymatic hydrolysis (biocatalysis). The objective of this work was to purify an enzyme from Streptomyces parvulus and to characterize it through physic-chemical applications including ultrasound effect. The purified protease has a molecular weight of 78.0 KDa, a yield of 31 % and 11.8-fold, it was stable between pH 4-9, optimum pH at 7.5, temperature of 0-45 °C, and showed optimum temperature at 45 °C, exhibited enhanced activity with Ca2+ and Mg2+, and was inhibited by PMSF. US in the treatment or pre-treatment of enzymatic reactions showed to be favorable and increase the activity around 85 % for the optimum temperature 45 °C. Also, in circular dichroism spectra it was shown a significant change in enzyme structure under US effect enhancing the real activity. Besides, the US improved the enzyme reactions for all assays. The purified enzyme was successfully immobilized in chitosan film. Thus, the present work demonstrated the promising results of a protease with collagenolytic activity in the field of Biotechnology by proving the positive effect induced by ultrasound.

蛋白酶是需求量很大的一大类酶,因为它们主要在生物医学领域有着广泛和不同的生物技术应用。超声波(US)已成功应用于生物技术中的多个生物过程,例如酶水解(生物催化)的上调。这项工作的目的是从侧链霉菌(Streptomyces parvulus)中纯化一种酶,并通过物理化学应用(包括超声效应)对其进行表征。纯化后的蛋白酶分子量为 78.0 KDa,产率为 31%,活性为 11.8 倍,在 pH 值 4-9 之间稳定,最适 pH 值为 7.5,温度为 0-45 ℃,最适温度为 45 ℃,在 Ca2+ 和 Mg2+ 的作用下活性增强,并受 PMSF 的抑制。在酶促反应的处理或预处理过程中,US 对酶促反应有利,在最佳温度 45 ℃ 时,酶促反应活性提高了约 85%。此外,圆二色光谱显示,在 US 的作用下,酶的结构发生了显著变化,从而提高了酶的实际活性。此外,US 还改善了所有测定中的酶反应。纯化的酶被成功固定在壳聚糖薄膜中。因此,本研究通过证明超声波的积极作用,证明了一种具有胶原蛋白溶解活性的蛋白酶在生物技术领域具有广阔的应用前景。
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引用次数: 0
Double-layer microencapsulation of ammonium polyphosphate and its enhancement on the hydrophobicity and flame retardancy of cellulose paper. 聚磷酸铵的双层微胶囊及其对纤维素纸的疏水性和阻燃性的增强。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137924
Kexin Liu, Zhangyi Wang, Ruidong Pan, Ling Xu, Feng Zhu, Yu Zhang, Yu Meng, Xinxing Xia

Cellulose paper is a flammable and hygroscopic material, which limits its application. In this paper, melamine-formaldehyde resin (MF) and silane coupling agents were used to microencapsulate ammonium polyphosphate (Si@MFAPP) in turn and added to the fibers suspension to prepare hydrophobic and flame-retardant cellulose paper. It was found that the surface of the ammonium polyphosphate (APP) was smooth with the water solubility of 0.24 g/100 mL. After microencapsulation with MF, the surface of MFAPP became rough, and the solubility was reduced to 0.1 g/100 mL. When further encapsulation with polysiloxanes, the surface showed significantly higher roughness, and a lotus leaf-like microspherical structure was formed. Specifically, its solubility decreased to 0.04 g/100 mL. In addition, the residual char weight of Si@MFAPP at 800 °C was increased from 25.27 % to 38.56 %. The water contact angle (WCA) of MFAPP/Pulp increased from 84.23° to 90.78°, and the limiting oxygen index (LOI) increased from 31.8 % to 34.1 %, meaning that the flame retardancy was obviously raised. The WCA of Si@MFAPP/Pulp enhanced to 96.45°, and the LOI was 34.5 %, meaning that the hydrophobicity was further raised. Therefore, Si@MFAPP significantly improved the flame-retardancy and hydrophobicity of the cellulose paper.

纤维素纸是一种易燃且吸湿性强的材料,这限制了它的应用。本文采用三聚氰胺-甲醛树脂(MF)和硅烷偶联剂依次微胶囊化聚磷酸铵(Si@MFAPP),并将其添加到纤维悬浮液中,制备出疏水阻燃纤维素纸。研究发现,聚磷酸铵(APP)表面光滑,水溶性为 0.24 g/100 mL。用 MF 进行微胶囊化后,聚磷酸铵表面变得粗糙,溶解度降至 0.1 克/100 毫升。当进一步用聚硅氧烷封装时,表面的粗糙度明显增加,并形成了荷叶状的微球体结构。具体来说,其溶解度降至 0.04 克/100 毫升。此外,Si@MFAPP 在 800 °C 时的残余炭重从 25.27 % 增加到 38.56 %。MFAPP/Pulp 的水接触角(WCA)从 84.23°增加到 90.78°,极限氧指数(LOI)从 31.8 % 增加到 34.1 %,这意味着阻燃性能明显提高。Si@MFAPP/Pulp 的 WCA 上升到 96.45°,LOI 为 34.5%,这意味着疏水性进一步提高。因此,Si@MFAPP 显著提高了纤维素纸的阻燃性和疏水性。
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引用次数: 0
Fabrication of cryogel polyelectrolyte complex of Tragacanth gum and chitosan with potential biological applications. 制作具有潜在生物应用价值的黄胶和壳聚糖低温凝胶聚电解质复合物。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137916
Bita Nouri, Reza Mohammad Ali Malek, Majid Montazer, Sorour Ramezanpour

To provide more insight into the potential applications of the biocompatible polyelectrolyte complexes (PECs) of Tragacanth gum (TG) and chitosan (CS) in the biological fields, the PEC cryogel of TG and CS were fabricated. Different TG:CS ratios were examined to optimize the PEC characteristics. Based on coacervation yield, water absorption, supernatant viscosity, turbidity, and rheological properties, 18:2 was chosen as the optimized ratio of TG:CS. The pH = 4 was selected as the optimized point, resulting in the highest level of interactions between anionic and cationic polysaccharides. The zeta potential of PECs was indicative of the charge neutralization between polyanions and polycations which were also studied by FTIR spectra. The cryogel exhibited a macroporous plate structure in leaf-like form and narrowed mesopores distributed around 2.4 and 4.6 nm. PECs exhibited anti-bacterial activities, reducing 95 % of E. coli within 1 h and 99.9 % after 24 h, as well as 80 % of S. aureus after 1 h and 99.9 % after 24 h. TG:CS cryogel adhered to the human fibroblast cell lines (HFFF2) without cytotoxicity effects. The scratch assay validated that the cryogel effectively induced wound closure in human fibroblast cells within 48 h.

为了更深入地了解黄原胶(TG)和壳聚糖(CS)的生物相容性聚电解质复合物(PEC)在生物领域的潜在应用,我们制备了黄原胶和壳聚糖的 PEC 冷凝胶。研究了不同的 TG:CS 比例,以优化 PEC 特性。根据共凝产率、吸水率、上清液粘度、浊度和流变特性,选择 18:2 作为 TG:CS 的最佳比例。选择 pH = 4 作为优化点,使阴离子多糖和阳离子多糖之间的相互作用达到最高水平。PECs 的 zeta 电位表明了多阴离子和多阳离子之间的电荷中和,傅立叶变换红外光谱也对其进行了研究。低温凝胶呈现出叶状的大孔板结构和分布在 2.4 纳米和 4.6 纳米之间的狭窄中孔。PECs 具有抗菌活性,在 1 小时内减少了 95% 的大肠杆菌,24 小时后减少了 99.9%;在 1 小时内减少了 80% 的金黄色葡萄球菌,24 小时后减少了 99.9%。TG:CS 低温凝胶粘附在人成纤维细胞系(HFFF2)上,不会产生细胞毒性。划痕试验验证了该冷凝胶可在 48 小时内有效诱导人成纤维细胞的伤口闭合。
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引用次数: 0
Nanostructured polymer composites for bone and tissue regeneration. 用于骨骼和组织再生的纳米聚合物复合材料。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137834
E Venkata Prathyusha, Shyam Sudhakar Gomte, Hafiz Ahmed, A Prabakaran, Mukta Agrawal, Naveen Chella, Amit Alexander

Nanostructured polymer composites have gained significant attention in recent years for their remarkable potential in bone and tissue regeneration. Moreover, with the integration of 3D printing technology, these composites hold promise for use in personalized medicine, where patient-specific scaffolds can be tailored to enhance therapeutic outcomes. Therefore, this review article aims to provide a comprehensive overview of the latest advancements in the development and application of nanostructured polymeric composites within the field of tissue engineering and bone regeneration. Here, the potential of biopolymers, natural polymers, and 3D-printed polymers to craft biocompatible, non-toxic, and mechanically robust composites is discussed in brief. Further, the fabrication techniques for 3D scaffolds and various forms of nanocomposites, including nanoparticles, nanocapsules, nanofibers, nanogels, and micelles for bone and tissue regeneration, are listed. Also, particular emphasis is placed on the role of nano-scaffolds and in situ hydrogels in bone and tissue regeneration. Overall, this review provides a concise and authoritative summary of the current state-of-the-art in nanostructured polymer composites for regenerative medicine, highlighting future directions and potential clinical applications.

近年来,纳米结构聚合物复合材料因其在骨骼和组织再生方面的巨大潜力而备受关注。此外,随着三维打印技术的整合,这些复合材料有望应用于个性化医疗,为患者量身定制特定的支架,以提高治疗效果。因此,这篇综述文章旨在全面概述纳米结构聚合物复合材料在组织工程和骨再生领域的开发和应用的最新进展。文章简要讨论了生物聚合物、天然聚合物和三维打印聚合物在制作生物兼容、无毒和机械坚固的复合材料方面的潜力。此外,还列举了用于骨骼和组织再生的三维支架和各种形式的纳米复合材料(包括纳米颗粒、纳米胶囊、纳米纤维、纳米凝胶和胶束)的制造技术。此外,还特别强调了纳米支架和原位水凝胶在骨骼和组织再生中的作用。总之,这篇综述简明而权威地总结了当前再生医学纳米结构聚合物复合材料的最新进展,突出了未来的发展方向和潜在的临床应用。
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引用次数: 0
Enhancing the quality attributes of porcine myofibrillar proteins through low-frequency alternating magnetic field-assisted freezing. 通过低频交变磁场辅助冷冻提高猪肌纤维蛋白的质量属性。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-20 DOI: 10.1016/j.ijbiomac.2024.137918
Mingming Zhu, Wang Liu, Mingzhe Li, Lijie Jiang, Huijie Li, Hui Wang, Xueli Gao, Hanjun Ma, Zhuangli Kang

This study explores the potential of low-frequency alternating magnetic field-assisted freezing (LF-MFF) on enhancing the physicochemical stability and gelling performance of porcine myofibrillar proteins (MPs). We observed that LF-MFF markedly reduced oxidative denaturation of MPs compared to refrigerator freezing (RF), thus maintaining higher gel quality. Notably, LF-MFF treatment at 3-4 mT enhanced MPs' solubility, decreased turbidity, and lowered dityrosine content. LF-MFF at 4 mT also effectively minimized MPs' aggregation and degradation. Rheological measurements revealed that the storage modulus (G') and apparent viscosity of MPs treated with 3-4 mT LF-MFF are comparable to those of fresh samples (FS). Furthermore, LF-MFF at 3-4 mT significantly improved the water-holding capacity (WHC), whiteness, gel strength, and textural properties of MPs. The 3-4 mT LF-MFF was particularly effective in enhancing hydrophobic interactions and hydrogen bonding, thereby inhibiting water mobility and protecting microstructure of MPs gels. In summary, LF-MFF, especially at 4 mT, improved the gelation properties of MPs by reducing oxidative denaturation, providing significant insights for its application in the frozen meat industry.

本研究探讨了低频交变磁场辅助冷冻(LF-MFF)在提高猪肌纤维蛋白(MPs)的理化稳定性和凝胶性能方面的潜力。我们观察到,与冰箱冷冻(RF)相比,LF-MFF 能显著减少 MPs 的氧化变性,从而保持更高的凝胶质量。值得注意的是,3-4 mT 的 LF-MFF 处理提高了 MPs 的可溶性,降低了浑浊度,并降低了酪氨酸含量。4 mT 的低频-中频傅立叶变换还有效地减少了 MPs 的聚集和降解。流变学测量显示,经 3-4 mT LF-MFF 处理的 MPs 的储存模量(G')和表观粘度与新鲜样品(FS)相当。此外,3-4 mT 的 LF-MFF 显著提高了 MPs 的持水量(WHC)、白度、凝胶强度和纹理特性。3-4 mT 的 LF-MFF 对增强疏水相互作用和氢键特别有效,从而抑制了水的流动,保护了 MPs 凝胶的微观结构。总之,LF-MFF,尤其是 4 mT 的 LF-MFF,通过减少氧化变性改善了 MPs 的凝胶特性,为其在冷冻肉类行业的应用提供了重要启示。
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International Journal of Biological Macromolecules
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