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Preparation of cellulose nanofiber/polyvinyl alcohol-based composite films for metal ion detection by starch/disodium calcium ethylenediaminetetraacetate synergistic complexation effect. 利用淀粉/乙二胺四乙酸二钠钙协同络合效应制备用于金属离子检测的纤维素纳米纤维/聚乙烯醇基复合膜
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137265
Can Wang, Yanlong Shang, Jie Guan, Nannan Chen, Shan Gao, Wenjing Xu, Limin Tao, Zhimao Li, Ziqiang Shao

Heavy metal pollution causes irreversible damage to plants, animals, and humans. Therefore, it is meaningful to develop facile, fast, and efficient strategies for heavy metal ion (HMI) detection. Here, a portable composite film (CPSE) was designed for HMI detection with high sensitivity and wide detection range. The CPSE was prepared by using cellulose nanofibers (CNF)/polyvinyl alcohol (PVA) as the matrix and utilizing modified starch (HPS) to assist disodium calcium ethylenediaminetetraacetate (EDTA-Ca) to form stable complexes with HMI. The R, G and B values (the three primary colors of light) were captured using an image acquisition system to produce an HMI standard color card successfully. Specifically, the composite film can effectively distinguish Cu2+, Pb2+ and Fe3+. The response time of the composite film to HMI was 2-4 s, and the detection ranges of Cu2+ and Fe3+ were 5-700 ppm and 10-1000 ppm, respectively. Additionally, the synergistic effect of HPS and EDTA-Ca led to the increase in tensile strength (1.59-1.71 times), tear strength (3.29-3.57 times), and glass transition temperature (~ 6 °C) compared to CNF/PVA/HPS and CNF/PVA/EDTA-Ca films. This study confirms the value of CPSE films as materials for HMI detection and suggests innovative ideas for designing similar biomass detection materials in the future.

重金属污染会对植物、动物和人类造成不可逆转的损害。因此,开发简便、快速、高效的重金属离子(HMI)检测策略具有重要意义。本文设计了一种用于重金属离子检测的便携式复合薄膜(CPSE),具有高灵敏度和宽检测范围。CPSE 以纤维素纳米纤维(CNF)/聚乙烯醇(PVA)为基质,利用改性淀粉(HPS)辅助乙二胺四乙酸二钠(EDTA-Ca)与 HMI 形成稳定的复合物。利用图像采集系统采集 R、G 和 B 值(光的三原色),成功制作出 HMI 标准色卡。具体来说,复合薄膜能有效区分 Cu2+、Pb2+ 和 Fe3+。复合薄膜对 HMI 的响应时间为 2-4 秒,Cu2+ 和 Fe3+ 的检测范围分别为 5-700 ppm 和 10-1000 ppm。此外,与 CNF/PVA/HPS 和 CNF/PVA/EDTA-Ca 薄膜相比,HPS 和 EDTA-Ca 的协同作用使拉伸强度(1.59-1.71 倍)、撕裂强度(3.29-3.57 倍)和玻璃化转变温度(~ 6 °C)均有所提高。这项研究证实了 CPSE 薄膜作为 HMI 检测材料的价值,并为今后设计类似的生物质检测材料提出了创新思路。
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引用次数: 0
Preparation of phosphorus-nitrogen synergistic flame retardant cellulose composite aerogel from waste cotton/phytic acid/acrylamide. 利用废棉/植酸/丙烯酰胺制备磷氮协同阻燃纤维素复合气凝胶。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137277
Linlin Wang, Hui Zhao, Lili Meng, Hualei Chen, Lixia Jia

Cellulose aerogel is a green and biodegradable material, but the high flammability of cellulose aerogel hinders its development. In order to expand the application range of cellulose aerogel, it is necessary to improve the flame retardancy of cellulose aerogel. In this paper, cellulose hydrogels were prepared by decolorizing waste cotton fabrics (WCF) and dissolving them in 1-butyl-3-methylimidazole chloride salt ([Bmim]Cl)/DMSO. The cellulose hydrogels were impregnated in aqueous phytic acid (PA)/acrylamide (AM) solution for a period of time and then heated and treated. A cellulose composite aerogel with excellent flame retardant properties was successfully prepared by using in situ polymerization. The results show that the cellulose composite aerogel has a porous structure and good thermal stability, and the residual carbon content in the air at 800 °C is >2.86 %. At the same time, it has excellent flame retardancy, the ultimate oxygen index (LOL) is >40, and the vertical combustion carbon length is <3.5 cm. The thermal insulation performance has also been improved, and the composite aerogel with a height of 1 cm has a temperature difference of 40.2 °C between the upper and lower surfaces on the 80 °C heating table.

纤维素气凝胶是一种可生物降解的绿色材料,但纤维素气凝胶的高可燃性阻碍了它的发展。为了扩大纤维素气凝胶的应用范围,有必要提高纤维素气凝胶的阻燃性。本文通过对废棉织物(WCF)进行脱色处理,并将其溶解在 1-丁基-3-甲基氯化咪唑盐([Bmim]Cl)/二甲基亚砜(DMSO)中,制备了纤维素水凝胶。纤维素水凝胶在植酸(PA)/丙烯酰胺(AM)水溶液中浸渍一段时间,然后加热处理。利用原位聚合法成功制备出了具有优异阻燃性能的纤维素复合气凝胶。结果表明,纤维素复合气凝胶具有多孔结构和良好的热稳定性,800 ℃时空气中的残碳含量大于2.86 %。同时,它还具有优异的阻燃性,极限氧指数(LOL)大于 40,垂直燃烧碳长度为
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引用次数: 0
Effect of electron beam irradiation pretreatment on the structural, physicochemical properties of potato starch-fatty acid complexes and the proliferation of Bifidobacterium adolescentis. 电子束辐照预处理对马铃薯淀粉-脂肪酸复合物的结构和理化性质以及青春期双歧杆菌增殖的影响
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137258
Miaomiao Tian, Yue Wang, Hongjia Sun, Jing Cai, Yunxiang Ma

The effects of different electron beam irradiation doses (5 KGy, 10 KGy, 20 KGy) on the complexation of potato starch with four saturated fatty acids with different chain lengths, i.e., lauric acid (LA), myristic acid (MA), palmitic acid (PA), and stearic acid (SA), were investigated, including structural properties, physicochemical properties, digestive properties, and the effect of Bifidobacteria proliferation. The complexing index increased significantly with increasing irradiation dose and showed the following order: 20 KGy > 10 KGy > 5 KGy > native starch. At irradiation dose of 20 KGy, PA (88.75 %) showed the highest complexing index, followed by MA (87.40 %), SA (82.95 %) and LA (72.33 %). The results of microstructure, relative crystallinity, gelatinization enthalpy, contact angle, and resistant starch content in starch-fatty acid complexes were consistent with the complexing index. In vitro digestion indicated that at irradiation dose of 20 KGy, the addition of PA yielded the highest content of resistant starch (50.35 %), followed by MA (49.25 %), SA (47.05 %) and LA (44.72 %). The four complexes were eventually assessed for their effects on Bifidobacteria's proliferation, with PA exerting the strongest proliferative effects, followed by MA, SA and LA. Overall, electron beam irradiation exhibited good application prospects in the field of starchy food processing and functional foods development.

研究了不同电子束辐照剂量(5KGy、10KGy、20KGy)对马铃薯淀粉与四种不同链长的饱和脂肪酸(月桂酸、肉豆蔻酸、棕榈酸和硬脂酸)络合的影响,包括结构性质、理化性质、消化性质以及对双歧杆菌增殖的影响。随着辐照剂量的增加,复合指数明显增加,并呈现以下顺序:20 KGy > 10 KGy > 5 KGy > 原生淀粉。辐照剂量为 20 KGy 时,PA(88.75%)的复合指数最高,其次是 MA(87.40%)、SA(82.95%)和 LA(72.33%)。淀粉脂肪酸复合物的微观结构、相对结晶度、糊化焓、接触角和抗性淀粉含量的结果与络合指数一致。体外消化结果表明,辐照剂量为 20 KGy 时,添加 PA 产生的抗性淀粉含量最高(50.35%),其次是 MA(49.25%)、SA(47.05%)和 LA(44.72%)。最终评估了这四种复合物对双歧杆菌增殖的影响,其中 PA 的增殖效果最强,其次是 MA、SA 和 LA。总之,电子束辐照在淀粉食品加工和功能食品开发领域具有良好的应用前景。
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引用次数: 0
Fabrication and characterization of double-layer active intelligent film based on chitosan, polyvinyl alcohol, grape skin anthocyanin and selenium nanoparticle. 基于壳聚糖、聚乙烯醇、葡萄皮花青素和纳米硒的双层活性智能薄膜的制备与表征。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137211
Xu Chen, Naiyu Xiao, Hongxia Xiang, Shuyi Li, Zhenzhou Zhu, Xin Cong, Xiang Chen, Shuiyuan Cheng

This study involved the fabrication of double-layer intelligent films using chitosan (CS), polyvinyl alcohol (PVA), grape skin anthocyanin (GSA), gellan gum (GG) and selenium nanoparticles (SeNPs). The CS/PVA/GSA layer functioned as the internal indicator layer, and the GG/SeNPs layer acted as the external layer for antioxidant and antimicrobial purposes. SEM, FTIR, XRD, and TGA results confirmed the successful fabrication of double-layer films as well as the presence of hydrogen bonding interaction between the two layers. The tensile strength of double-layer films (8.06 MPa-9.61 MPa) fallen between that of single-layer CS/PVA/GSA film (12.51 MPa) and GG/SeNPs film (1.50 MPa-7.67 MPa). The double-layer films demonstrated good UV-blocking abilities, as well as outstanding antioxidant (ABTS scavenging rate can be up to ~80 %) and antimicrobial properties. Compared with single-layer CS/PVA/GSA film, the double-layer film incorporated with 6.6 wt% SeNPs (CPG/GS2 film) possessed a more rapid and stronger response towards NH3/acetic acid as well as enhanced storage stability. Furthermore, the CPG/GS2 film can increase the shelf life of strawberries at 25 °C by 4 days, and its visible color change showed strong correlation with the weight loss rate (R2 = 0.99) and hardness (R2 = 0.98) of strawberries.

这项研究涉及使用壳聚糖(CS)、聚乙烯醇(PVA)、葡萄皮花青素(GSA)、结冷胶(GG)和硒纳米粒子(SeNPs)制作双层智能薄膜。CS/PVA/GSA 层作为内部指示剂层,GG/SeNPs 层作为外部抗氧化和抗菌层。扫描电镜、傅立叶变换红外光谱、X 射线衍射和热重分析结果证实了双层薄膜的成功制备以及两层之间氢键作用的存在。双层薄膜的拉伸强度(8.06 MPa-9.61 MPa)介于单层 CS/PVA/GSA 薄膜(12.51 MPa)和 GG/SeNPs 薄膜(1.50 MPa-7.67 MPa)之间。双层薄膜具有良好的紫外线阻隔能力、出色的抗氧化性(ABTS 清除率可达约 80%)和抗菌性。与单层 CS/PVA/GSA 薄膜相比,掺入 6.6 wt% SeNPs 的双层薄膜(CPG/GS2 薄膜)对 NH3/乙酸的反应更快、更强,储存稳定性也更高。此外,CPG/GS2 薄膜可将草莓在 25 °C 下的保质期延长 4 天,其可见颜色变化与草莓的失重率(R2 = 0.99)和硬度(R2 = 0.98)密切相关。
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引用次数: 0
Pineapple stem starch-based films incorporated with pineapple leaf carbon dots as functional filler for active food packaging applications. 以菠萝茎淀粉为基材、掺入菠萝叶碳点作为功能填料的薄膜,可用于活性食品包装。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137224
Pusita Kuchaiyaphum, Taweechai Amornsakchai, Chatrachatchaya Chotichayapong, Nikorn Saengsuwan, Visittapong Yordsri, Chanchana Thanachayanont, Phitchaya Batpo, Phatcharaporn Sotawong

Pineapple leaf waste, a byproduct of agricultural processes, was used as a novel raw material to synthesize carbon dots (CDs) through a simple hydrothermal method. The CDs were subsequently incorporated into pineapple stem starch (PSS)-based active food packaging films. The characterization of the CDs and PSS-CDs films was conducted using various techniques, including UV-light spectroscopy, fluorescence spectroscopy, and transmission electron microscopy. The results revealed that the CDs measured 2.36 ± 0.33 nm and exhibited antioxidant and antibacterial activities. The addition of the CDs led to notable enhancements in both mechanical strength and UV-barrier properties. Thus, PSS-CDs packaging film was successfully prepared, with the incorporation of CDs enhancing the antioxidant and antimicrobial properties of the film, thereby extending the shelf-life of fresh pork.

菠萝叶废弃物是农业加工的一种副产品,它被用作一种新型原材料,通过一种简单的水热法合成碳点(CD)。随后将碳点掺入以菠萝茎淀粉(PSS)为基础的活性食品包装薄膜中。利用紫外光谱、荧光光谱和透射电子显微镜等多种技术对碳点和 PSS-CDs 薄膜进行了表征。结果显示,CD 的尺寸为 2.36 ± 0.33 nm,具有抗氧化和抗菌活性。添加光盘后,机械强度和紫外线阻隔性能都有显著提高。因此,PSS-CDs 包装膜的制备获得了成功,CD 的加入增强了薄膜的抗氧化和抗菌性能,从而延长了新鲜猪肉的保质期。
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引用次数: 0
The TCONS_00046732/chi-miR-135b-5p/PRLR regulatory axis promotes endometrial epithelial cells growth through the PI3K-Akt signaling pathway. TCONS_00046732/chi-miR-135b-5p/PRLR调节轴通过PI3K-Akt信号通路促进子宫内膜上皮细胞生长。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137248
Yanyan Wang, Qing Li, Peipei He, Lu Zhang, Tianle Chao, Jianmin Wang

Non-coding RNAs are considered key regulatory factors in biological and reproductive physiological processes in mammals. However, the molecular functions of long noncoding RNAs (lncRNAs) in regulating dynamic uterine development and reproductive capacity during sexual maturation remain unclear. This study analyzed the expression characteristics and molecular functions of lncRNAs in uterine tissues from 20 goats at four specific time points during sexual maturation: day 1 after birth (D1), 2 months (M2), 4 months (M4), and 6 months (M6), finding that stage-specific DE lncRNAs may regulate cell proliferation, apoptosis, hormone secretion, metabolism, and immune response through multiple action modes. Within the lncRNA-miRNA-mRNA network, a novel lncRNA, TCONS_00046732, associated with uterine development, exhibited significantly higher expression during sexual maturity compared to the prepubertal stage, correlating positively with PRLR and negatively with chi-miR-135b-5p. FISH and IF analyses revealed significant co-localization and distinct expression patterns of TCONS_00046732, chi-miR-135b-5p, and PRLR in the endometrial epithelium. Further experiments confirmed that TCONS_00046732 competitively binds to chi-miR-135b-5p to upregulate PRLR, thereby activating the PI3K-Akt signaling pathway, promoting primary endometrial epithelial cell proliferation, G1-to-S phase transition, and inhibiting apoptosis. These findings enhance our understanding of uterine molecular regulation and provide key insights into the molecular basis of goat sexual development.

非编码 RNA 被认为是哺乳动物生物和生殖生理过程中的关键调控因子。然而,长非编码 RNA(lncRNA)在性成熟过程中调控子宫动态发育和生殖能力的分子功能仍不清楚。本研究分析了20只山羊性成熟过程中四个特定时间点(出生后第1天(D1)、2个月(M2)、4个月(M4)和6个月(M6))子宫组织中lncRNA的表达特征和分子功能,发现特定阶段的DE lncRNA可能通过多种作用模式调控细胞增殖、凋亡、激素分泌、新陈代谢和免疫反应。在lncRNA-miRNA-mRNA网络中,与子宫发育相关的新型lncRNA TCONS_00046732在性成熟期的表达量显著高于青春期前,与PRLR呈正相关,与chi-miR-135b-5p呈负相关。FISH 和 IF 分析显示,在子宫内膜上皮细胞中,TCONS_00046732、chi-miR-135b-5p 和 PRLR 有明显的共定位和不同的表达模式。进一步的实验证实,TCONS_00046732能竞争性地与chi-miR-135b-5p结合,上调PRLR,从而激活PI3K-Akt信号通路,促进原发性子宫内膜上皮细胞增殖、G1-S期转变和抑制细胞凋亡。这些发现加深了我们对子宫分子调控的理解,并为了解山羊性发育的分子基础提供了重要启示。
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引用次数: 0
Deciphering the Arf (ADP-ribosylation factor) gene family in Brassica napus L.: Genome-wide insights into duplication, expression, and rapeseed yield enhancement. 解密甘蓝型油菜中的 Arf(ADP-核糖基化因子)基因家族:关于重复、表达和油菜籽增产的全基因组见解。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137257
Hui Wang, Xiaodong Li, Boyu Meng, Wei Chang, Minghao Zhang, Likai Miao, Siyu Wei, Haikun Yang, Shengting Li, Yonghai Fan, Mingchao Qian, Yuling Chen, Shahid Ullah Khan, Lijuan Wei, Cunmin Qu, Jiana Li, Jiaming Song, Kun Lu

The Arf gene family is essential for crop growth and development by regulating vesicle transport. However, few studies exist on the role of Arfs in the growth and yield formation of Brassica napus. Here we provide an exhaustive account of the phylogeny and expression of the 66 Arfs in rapeseed. We found that the expansion of Arf gene family is mainly through whole genome duplication, and some genes are loss during the expansion process. Expression analysis revealed that the Arfs in group X, with the exception of BnaC02.ARFA1B, BnaC06.ARFA1A.2, and BnaA07.ARFA1A.2, exhibited high expression levels across various tissues of B. napus at different developmental stages. These results indicate that the Arfss in group X were important in influencing rapeseed growth and development. We have found that Arfs in B. napus may have a more complex regulatory mechanism due to homologous recombination and gene sub-functionalization. Haplotype analysis indicated that Arfs regulate B. napus yield formation. We found high expression of BnaC07.ARFA1A in all tissues, and its overexpression significantly increased rapeseed silique number and yield. The comprehensive analysis will further characterize the functions of Arfs in B. napus and enhance regulatory networks for yield formation in B. napus.

Arf 基因家族通过调节囊泡运输对作物的生长和发育至关重要。然而,有关 Arfs 在甘蓝型油菜生长和产量形成中的作用的研究却很少。在此,我们对油菜中 66 个 Arfs 基因的系统发育和表达进行了详尽的阐述。我们发现 Arf 基因家族的扩增主要是通过全基因组复制实现的,部分基因在扩增过程中丢失。表达分析表明,除BnaC02.ARFA1B、BnaC06.ARFA1A.2和BnaA07.ARFA1A.2外,X组中的Arfs在油菜不同发育阶段的不同组织中均表现出较高的表达水平。这些结果表明,X 组中的 Arfss 对油菜籽的生长发育有重要影响。我们发现,由于同源重组和基因亚功能化,油菜中的 Arfs 可能具有更复杂的调控机制。单倍型分析表明,Arfs调控着油菜产量的形成。我们发现,BnaC07.ARFA1A 在所有组织中都有较高的表达量,它的过表达能显著增加油菜子实体的数量和产量。综合分析将进一步阐明 Arfs 在油菜中的功能,并增强油菜产量形成的调控网络。
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引用次数: 0
Development of polyvinyl alcohol/carboxymethylcellulose-based bio-packaging film with citric acid crosslinking and clove essential oil encapsulated chitosan nanoparticle pickering emulsion. 柠檬酸交联聚乙烯醇/羧甲基纤维素基生物包装膜和丁香精油包裹壳聚糖纳米粒子挑拣乳液的开发。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137223
Numporn Thungphotrakul, Paweena Prapainainar

This study developed polyvinyl alcohol (PVA)/carboxymethylcellulose (CMC)-based films, using citric acid (CA) as a non-toxic crosslinking agent, to enhance the shelf life of water-soluble packaging films. Clove essential oil (CEO)-loaded chitosan nanoparticles (CSNPs) were prepared via Pickering emulsion and incorporated into PVA/CMC/CA composite films. The encapsulation of CEO was confirmed by FTIR and optical microscopy. Thermal properties were analyzed using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), revealing improved thermal stability and a decrease in glass transition temperature (Tg) upon crosslinking. The formation of ester bonds was confirmed by ATR-FTIR and 13CNMR. Water contact angle (WCA) measurements showed a decrease in hydrophilicity, enhancing the barrier properties of the films. SEM images demonstrated good dispersion of CSNP/CEO within the matrix, improving mechanical and barrier properties. The films exhibited a 30 % reduction in water vapor permeability and water solubility. Controlled release studies indicated that the composite films sustained CEO release, extending the shelf life of cherry tomatoes. Thus, these PVA/CMC/CA-CSNP/CEO composite films offer strong potential for food preservation applications.

本研究使用柠檬酸(CA)作为无毒交联剂,开发了基于聚乙烯醇(PVA)/羧甲基纤维素(CMC)的薄膜,以提高水溶性包装薄膜的保质期。丁香精油(CEO)负载壳聚糖纳米粒子(CSNPs)是通过皮克林乳液法制备的,并被加入到 PVA/CMC/CA 复合薄膜中。傅立叶变换红外光谱和光学显微镜证实了 CEO 的封装。使用热重分析法(TGA)和差示扫描量热法(DSC)对其热特性进行了分析,结果表明交联后其热稳定性提高,玻璃化转变温度(Tg)降低。ATR-FTIR 和 13CNMR 证实了酯键的形成。水接触角(WCA)测量结果表明,薄膜的亲水性降低,从而提高了薄膜的阻隔性能。扫描电子显微镜图像显示 CSNP/CEO 在基质中分散良好,提高了机械和阻隔性能。薄膜的水蒸气渗透性和水溶性降低了 30%。控释研究表明,复合薄膜可持续释放 CEO,延长樱桃番茄的保质期。因此,这些 PVA/CMC/CA-CSNP/CEO 复合薄膜具有很强的食品保鲜应用潜力。
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引用次数: 0
Exploring the potential of polysaccharides-based injectable self-healing hydrogels for wound healing applications: A review. 探索基于多糖的可注射自愈合水凝胶在伤口愈合应用中的潜力:综述。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137209
Seyed Morteza Naghib, Amir Matini, Saba Amiri, Bahar Ahmadi, M R Mozafari

In recent decades, significant advancements have been made in wound healing treatments, mainly due to the development of biopolymer-based hydrogels. These injectable self-healing hydrogels have attracted considerable interest because of their unique attributes, including reversible chemistry, injectability, and printability. Unlike traditional hydrogels, injectable polysaccharide-based self-healing hydrogels offer numerous benefits. They can be tailored to fit individual patients, significantly advancing personalized medicine. Upon injection, these hydrogels transform in situ into a substance that effectively covers the entire lesion in all three dimensions, reaching irregular and deep lesions. Injectable self-healing hydrogels also play a pivotal role in promoting tissue regeneration. Their diffusive and viscoelastic properties allow for the controlled delivery of cells or therapeutics in a spatiotemporal manner, provide mechanical support, and facilitate the local recruitment and modulation of host cells. Consequently, these hydrogels have revolutionized innovative approaches to tissue regeneration and are ideally suited for managing chronic wounds. This review paper presents a comprehensive classification of injectable self-healing hydrogels commonly used in chronic wound repair and provides a detailed analysis of the various applications of injectable self-healing hydrogels in treating chronic wounds, thereby illuminating this rapidly evolving field.

近几十年来,伤口愈合治疗取得了重大进展,这主要归功于生物聚合物水凝胶的开发。这些可注射的自愈合水凝胶因其独特的属性(包括可逆化学性、可注射性和可印刷性)而备受关注。与传统水凝胶不同,基于多糖的可注射自愈合水凝胶具有众多优点。它们可以根据患者的具体情况量身定制,极大地推动了个性化医疗的发展。注射后,这些水凝胶会在原位转化为一种物质,有效覆盖整个病灶的所有三维空间,覆盖不规则和深层病灶。注射型自愈合水凝胶在促进组织再生方面也发挥着关键作用。水凝胶的扩散性和粘弹性使其能够以时空方式控制细胞或治疗药物的输送,提供机械支持,并促进宿主细胞的局部招募和调节。因此,这些水凝胶彻底改变了组织再生的创新方法,是治疗慢性伤口的理想选择。本综述论文对常用于慢性伤口修复的可注射自愈合水凝胶进行了全面分类,并详细分析了可注射自愈合水凝胶在治疗慢性伤口方面的各种应用,从而阐明了这一快速发展的领域。
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引用次数: 0
Phase separation drives the folding of recombinant collagen. 相分离驱动重组胶原蛋白的折叠。
IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.ijbiomac.2024.137170
Mengjie Shen, Daniil Astapov, Dmitrii Fedorov, Teemu Välisalmi, Markus B Linder, A Sesilja Aranko

Recombinantly produced collagens present a sustainable, ethical, and safe substitute for collagens derived from natural sources. However, controlling the folding of the recombinant collagens, crucial for replicating the mechanical properties of natural materials, remains a formidable task. Collagen-like proteins from willow sawfly are relatively small and contain no hydroxyprolines, presenting an attractive alternative to the large and post-translationally modified mammalian collagens. Utilizing CD spectroscopy and analytical ultracentrifugation, we demonstrate that recombinant willow sawfly collagen assembles into collagen triple helices in a concentration-dependent manner. Interestingly, we observed that the lower concentration threshold for the folding can be overcome by freezing or adding crowding agents. Microscopy data show that both freezing and the addition of crowding agents induce phase separation. We propose that the increase in local protein concentration during phase separation drives the nucleation-step of collagen folding. Finally, we show that freezing also induces the folding of recombinant human collagen fragments and accelerates the folding of natural bovine collagen, indicating the potential to apply phase separation as a universal mechanism to control the folding of recombinant collagens. We anticipate that the results provide a method to induce the nucleation of collagen folding without any requirements for genetic engineering or crosslinking.

重组生产的胶原蛋白是天然来源胶原蛋白的一种可持续、道德和安全的替代品。然而,控制重组胶原的折叠是复制天然材料机械特性的关键,这仍然是一项艰巨的任务。柳锯蝇的胶原样蛋白相对较小,不含羟脯氨酸,是大分子和翻译后修饰的哺乳动物胶原蛋白的一个有吸引力的替代品。利用 CD 光谱和分析超速离心法,我们证明了重组柳锯蝇胶原蛋白以浓度依赖的方式组装成胶原蛋白三螺旋。有趣的是,我们观察到折叠的低浓度阈值可以通过冷冻或添加拥挤剂来克服。显微镜数据显示,冷冻和添加拥挤剂都会导致相分离。我们认为,相分离过程中局部蛋白质浓度的增加推动了胶原蛋白折叠的成核步骤。最后,我们发现冷冻也能诱导重组人胶原片段的折叠,并加速天然牛胶原的折叠,这表明相分离有可能作为一种通用机制用于控制重组胶原的折叠。我们预计,这些结果提供了一种无需基因工程或交联就能诱导胶原蛋白折叠成核的方法。
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引用次数: 0
期刊
International Journal of Biological Macromolecules
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