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High efficacy and biocompatibility: Application and biological evaluation of LA67 liposome in colon cancer therapy 高效、生物相容性:LA67脂质体在结肠癌治疗中的应用及生物学评价
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-07 DOI: 10.1016/j.colsurfb.2026.115429
Nuoya Wang , Jingyuan Wang , Zhenghu Yuan , Zhonggao Gao , Mingji Jin , Minhu Cui
In this study, a single-component liposomal nano-delivery system (LA67@Lipo) was developed for the new antitumor drug LA67. The resulting liposomes were homogenous, spherical vesicles with an average particle size of approximately 109.2 ± 3.8 nm, polydispersity index value of 0.147, and zeta potential of –8.78 ± 0.29 mV, demonstrating excellent dispersibility and stability. The drug encapsulation efficiency surpassed 89.7 ± 3.5 %. Liposomes exhibited a sustained in vitro drug release profile. LA67@Lipo markedly improved internalization by C26 colon cancer cells, effectively inhibiting cell proliferation and inducing apoptosis. In a C26 tumor-bearing mouse model, intravenously administered LA67@Lipo exhibited superior tumor suppression effects. It inhibited Ki-67 and CD31 and decreased intratumoral microvessel density without inducing systemic toxicity, demonstrating excellent in vivo antitumor efficacy and good biosafety. In conclusion, LA67@Lipo is an efficacious therapeutic approach for colon cancer. This optimized design of LA67@Lipo meets clinical demand for "safety, efficacy, and manufacturability" while addressing batch-to-batch reproducibility in nanomedicine.
本研究为新型抗肿瘤药物LA67开发了单组分脂质体纳米递送系统(LA67@Lipo)。所得脂质体为均匀球形囊泡,平均粒径约为109.2 ±3.8 nm,多分散指数为0.147,zeta电位为-8.78 ±0.29 mV,具有良好的分散性和稳定性。包封率达89.7 ±3.5 %。脂质体表现出持续的体外药物释放特征。LA67@Lipo显著改善C26结肠癌细胞内化,有效抑制细胞增殖,诱导细胞凋亡。在C26荷瘤小鼠模型中,静脉给药LA67@Lipo表现出较好的抑瘤效果。抑制Ki-67和CD31,降低肿瘤内微血管密度,不引起全身毒性,具有良好的体内抗肿瘤疗效和生物安全性。总之,LA67@Lipo是一种有效的结肠癌治疗方法。这种优化设计的LA67@Lipo满足了临床对“安全性、有效性和可制造性”的需求,同时解决了纳米医学中批次到批次的可重复性问题。
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引用次数: 0
Engineered dialdehyde dextran/quaternized chitosan hydrogel incorporating myricetin nanoparticles for diabetic oral wound management 含有杨梅素纳米颗粒的工程双醛葡聚糖/季铵化壳聚糖水凝胶用于糖尿病口腔伤口管理
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-06 DOI: 10.1016/j.colsurfb.2026.115421
Xiaoqian Du , Huijie Zhang , Bo Li , Wei Dong , Shengye You
Conventional management of diabetic mouth ulcers often demonstrates limited efficacy. Primary obstacles to recovery encompass microbial colonization, damage from reactive oxygen species, and deficient blood vessel development. To meet this significant clinical challenge, an injectable hydrogel biomaterial termed DQM1 has been developed, specifically designed for promoting tissue regeneration in diabetic oral wounds. This composite construct comprises an interconnected polysaccharide network combining dialdehyde dextran and quaternized chitosan, strengthened through myricetin nanoparticles generated via magnesium ion-driven myricetin self-assembly. Post-injection, DQM1 rapidly establishes a protective hydrogel barrier. The dressing demonstrates potent antimicrobial activity coupled with effective scavenging of detrimental reactive species. Collective actions transform the injury environment from a chronically inflamed state to an active rebuilding phase. A significant benefit involves inherent post-treatment biodegradability, guaranteeing complete elimination after fulfilling its regenerative function. Outcomes from laboratory studies and animal models demonstrate that DQM1 markedly enhances oral mucosal wound healing. As an innovative therapeutic platform, such hydrogel-based technology presents considerable potential as a solution for diabetic oral lesions, thereby improving patient prognoses in this complex disorder.
传统的糖尿病口腔溃疡治疗方法往往疗效有限。恢复的主要障碍包括微生物定植、活性氧损伤和血管发育缺陷。为了应对这一重大的临床挑战,一种名为DQM1的可注射水凝胶生物材料被开发出来,专门用于促进糖尿病口腔伤口的组织再生。该复合结构包括一个由双醛葡聚糖和壳聚糖季铵盐组成的相互连接的多糖网络,通过镁离子驱动的杨梅素自组装产生的杨梅素纳米颗粒加强。注射后,DQM1迅速建立保护性水凝胶屏障。该敷料具有强大的抗菌活性,并能有效清除有害的活性物质。集体行动将损伤环境从慢性炎症状态转变为积极的重建阶段。一个显著的好处是内在的后处理生物降解性,保证在完成再生功能后完全消除。实验室研究和动物模型的结果表明,DQM1显著促进口腔黏膜伤口愈合。作为一种创新的治疗平台,这种基于水凝胶的技术作为糖尿病口腔病变的解决方案具有相当大的潜力,从而改善了这种复杂疾病的患者预后。
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引用次数: 0
Enhancing properties of damaged hair through moisture control via construction of highly hydrophobic surface 通过高度疏水表面的结构来控制水分,增强受损头发的性能
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-06 DOI: 10.1016/j.colsurfb.2026.115427
Fubing Liu , Chaohai Li , Jinhua Li , Jing Wang , Kuan Chang
Hair dyeing and perming processes damage could significantly reduce the stability and mechanical properties of keratin, making hair rough and fragile. Different hair repair ingredients have been developed by strengthening the chemical bonds inside hair. In this work, a new repair strategy of altering hair water content by construing highly hydrophobic surface was proposed. This was achieved by treating damaged hair with maleic-modified amino silicone oil (MASO), which was synthesized through the amidation reaction of maleic acid with poly[dimethylsiloxane-co-(3-aminopropyl)methylsiloxane] (ASO). Due to the thiol-Michael click reaction with free thiol groups on reduced hair surface, MASO presented high deposition efficiency at a low dosage of 0.1 wt%, which was confirmed by SEM and contact angle measurements. After MASO treatment, hair forms a highly hydrophobic surface with a contact angle of 137 °, significantly higher than that of virgin hair. The highly hydrophobic surface hinders the penetration of moisture into the hair, especially reducing the bound water content from 4.46 % to 2.81 %. This was jointly proven by the disappearance process of water droplets on hair strands, TGA testing, and DVS testing. The reduced water content in MASO-treated hair significantly lowered the combing work, with the wet combing work decreasing from 336.12 J to 43.52 J, giving a 87.05 % decrease, and enhanced the thermal stability of keratin, ultimately increasing Young's modulus and tensile strength by 13.99 % and 9.13 %, respectively. This finding demonstrates that the impact of water on tensile properties can even exceed the adverse effects caused by the breakage of disulfide bonds for reduce damaged hair.
染发和烫发过程的损伤会显著降低角蛋白的稳定性和力学性能,使头发变得粗糙和脆弱。通过加强头发内部的化学键,已经开发出了不同的护发成分。本文提出了一种通过构建高疏水表面来改变头发含水量的修复策略。这是通过马来酸与聚[二甲基硅氧烷-co-(3-氨基丙基)甲基硅氧烷](ASO)酰胺化反应合成的马来烯改性氨基硅氧油(MASO)治疗受损头发而实现的。通过扫描电镜和接触角测量证实,在0.1 wt%的低剂量下,MASO与还原毛表面的游离巯基发生了巯基-迈克尔键合反应,具有较高的沉积效率。经过MASO处理后,头发形成高度疏水表面,接触角为137 °,明显高于未处理头发。高度疏水的表面阻碍了水分渗透到头发中,特别是将结合水含量从4.46 %降低到2.81 %。水滴在发丝上的消失过程、TGA测试和DVS测试共同证明了这一点。经maso处理的头发含水量降低,显著降低了精梳功,湿法精梳功从336.12 J减少到43.52 J,减少87.05 %,增强了角蛋白的热稳定性,最终杨氏模量和抗拉强度分别提高13.99 %和9.13 %。这一发现表明,水对拉伸性能的影响甚至可以超过二硫键断裂所造成的不利影响,以减少受损的头发。
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引用次数: 0
Fabrication of SilMA hydrogels with stiffness gradients for soft-to-hard interface tissue engineering 软硬界面组织工程中具有刚度梯度的SilMA水凝胶的制备。
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-06 DOI: 10.1016/j.colsurfb.2026.115425
Siyuan Liu , Xialing Tu , Jiaxuan Huang , Nianjie Wu , Bin Xia , Guobao Chen
Native tissue interfaces exhibit continuous gradients in mechanical stiffness and extracellular matrix (ECM) composition, which are essential for effective load transmission and functional integration between adjacent tissues. However, accurately replicating these intricate biomechanical gradients in engineered biomaterials remains a significant challenge in interface tissue engineering. In this study, we present a stiffness-gradient methacrylated silk fibroin (SilMA) hydrogel designed to promote tissue interface regeneration, with a focus on mechanical cues as a critical design parameter. Silk fibroin was chemically modified into SilMA, and its concentration systematically varied to produce multilayer hydrogels exhibiting a continuous stiffness gradient ranging from 7.07 ± 4.02 kPa to 71.30 ± 0.97 kPa, effectively mimicking the native mechanical heterogeneity found at tissue interfaces. Functional assays revealed that the low-stiffness layer significantly enhanced angiogenesis, the intermediate-stiffness layer provided an optimal mechanical environment for stem cell osteogenic differentiation, and the high-stiffness layer recapitulated the biomechanical properties of native cartilage tissue. This biomimetic stiffness-gradient SilMA hydrogel scaffold offers a promising strategy for regenerating complex tissue interfaces by harnessing the instructive role of mechanical microenvironments. Our findings underscore the importance of spatially graded mechanical properties in guiding cellular responses and tissue repair, and advance the design of next-generation materials for interface tissue engineering.
原生组织界面在机械刚度和细胞外基质(ECM)组成上表现出连续的梯度,这对于相邻组织之间有效的载荷传递和功能整合至关重要。然而,在工程生物材料中精确地复制这些复杂的生物力学梯度仍然是界面组织工程的一个重大挑战。在这项研究中,我们提出了一种刚度梯度甲基丙烯酸基丝素(SilMA)水凝胶,旨在促进组织界面再生,重点关注机械线索作为关键设计参数。将丝素蛋白化学修饰为SilMA,并系统地改变其浓度,制备出具有连续刚度梯度的多层水凝胶,其范围从7.07 ±4.02 kPa到71.30 ±0.97 kPa,有效地模拟了组织界面的天然力学非均质性。功能分析显示,低刚度层显著促进血管生成,中等刚度层为干细胞成骨分化提供了最佳的力学环境,高刚度层再现了天然软骨组织的生物力学特性。这种仿生刚度梯度SilMA水凝胶支架通过利用机械微环境的指导作用,为复杂组织界面的再生提供了一种有前途的策略。我们的发现强调了空间梯度力学性能在指导细胞反应和组织修复中的重要性,并推进了下一代界面组织工程材料的设计。
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引用次数: 0
Osteoinductive sandwich-structured HA/PEEK implant for rapid critical-size skull repair 骨诱导夹层结构HA/PEEK植入物用于快速修复临界尺寸颅骨
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-06 DOI: 10.1016/j.colsurfb.2026.115428
Mei-li Qi , Kunshan Yuan , Enhui Song , Xiangyi Feng , Tianheng Lu , Lin Zhao , Haihong Guo , Haijun Zhang
Critical-size bone defects afflict millions annually, driving a cascade of inflammation and incomplete tissue regeneration. Polyetheretherketone (PEEK) remains the material of choice for load-bearing implants because its modulus mirrors that of cortical bone; yet its notorious bioinertness curtails both anti-inflammatory signaling and osseointegration, stalling the healing process. To break this stalemate, we designed a sandwich-structured, osteoinductive hydroxyapatite (HA)/PEEK implant tailored for skull repair. A porous PEEK core was engineered via the salting out technique and its surface was homogeneously functionalized with HA through simple physical blending, preserving the implant’s open porosity while imparting potent osteoinductive activity. In a rabbit critical calvarial defect (10 mm diameter), new bone advanced from the periphery to the center, achieving full osseous continuity within only 4 months and markedly surpassing unmodified PEEK. The robust bone-implant integration demonstrated by this sandwich HA/PEEK construct not only converts a bioinert polymer into an osteoinductive implant but also may expand treatment options for growing children, offering a clinically translatable solution for skull repair after trauma, hemorrhage, tumor resection, or congenital dysplasia.
严重的骨缺损每年折磨数百万人,引发一连串的炎症和不完全的组织再生。聚醚醚酮(PEEK)仍然是承重植入物的首选材料,因为它的模量与皮质骨相似;然而,其臭名昭著的生物惰性限制了抗炎信号和骨整合,延缓了愈合过程。为了打破这一僵局,我们设计了一种三明治结构的骨诱导羟基磷灰石(HA)/PEEK植入物,专门用于颅骨修复。通过盐析技术设计多孔PEEK芯,其表面通过简单的物理混合与透明质酸均匀功能化,保留了植入物的开放孔隙度,同时赋予了有效的骨诱导活性。在兔严重颅骨缺损(10 mm直径)中,新骨从周围向中心推进,仅在4个月内实现了完全的骨连续性,明显优于未修饰的PEEK。这种夹层HA/PEEK结构所展示的强大的骨植入整合不仅将生物惰性聚合物转化为骨诱导植入物,而且还可以为成长中的儿童提供更多的治疗选择,为创伤、出血、肿瘤切除或先天性发育不良后的颅骨修复提供临床可翻译的解决方案。
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引用次数: 0
ZIF-8-based Schottky heterojunction for boosting the sonodynamic antimicrobial effect of chlorin e6 on MRSA 基于zif -8的肖特基异质结增强氯e6对MRSA的声动力抗菌作用
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-06 DOI: 10.1016/j.colsurfb.2026.115419
Xiaoyang Xu , Danni Wang , Bingjie Leng , Tingting Gao , Zhenning Cui , Xiao Wang , Bin Liu
Sonodynamic antimicrobial chemotherapy (SACT) has been regarded as an emerging approach for antimicrobial treatment due to its advantages of deep tissue penetration, non-invasive nature, and absence of resistance. However, several challenges hinder its clinical application, for example insufficient oxygen levels at infection sites, poor solubility and stability of sonosensitizers. Herein, we developed chlorin e6@ZIF-8@Ag (CZ@Ag) nanocomposite as a Schottky heterojunction sonosensitizer with high electron-hole separation and narrow bandgap. The results reveal that the Schottky barrier between ZIF-8 and Ag nanoparticles can availably restrain electron backflow, further promoting the yield of reactive oxygen species (ROS) under ultrasound treatment. Experimentally, the minimum inhibitory concentration of CZ@Ag against methicillin-resistant Staphylococcus aureus (MRSA) reduced from 320 μg/mL to 80 μg/mL, and its antibacterial rate was up to 96.3 % after 3 min of ultrasound irradiation. Furthermore, mechanistic studies found that CZ@Ag-mediated SACT is mainly achieved by inhibiting biofilm formation, damaging cell membrane integrity, enhancing more ROS generation, and increasing cell membrane permeability, leading to the leakage of intracellular contents. All these findings proved that CZ@Ag had great possibility for antibacterial therapy, and this investigation offered a feasible direction for developing efficient sonosensitizers.
声动力抗菌素化疗(SACT)因其深入组织、无创、无耐药等优点而被认为是一种新兴的抗菌素治疗方法。然而,一些挑战阻碍了其临床应用,例如感染部位的氧气水平不足,超声增敏剂的溶解度和稳定性差。在此,我们开发了氯e6@ZIF-8@Ag (CZ@Ag)纳米复合材料作为具有高电子空穴分离和窄带隙的肖特基异质结声敏剂。结果表明,ZIF-8与Ag纳米粒子之间的Schottky势垒可以有效地抑制电子回流,进一步促进超声处理下活性氧(ROS)的产率。实验结果表明,CZ@Ag对耐甲氧西林金黄色葡萄球菌(MRSA)的最低抑菌浓度由320 μg/mL降至80 μg/mL,超声照射3 min后其抑菌率高达96.3% %。此外,机制研究发现CZ@Ag-mediated SACT主要通过抑制生物膜的形成,破坏细胞膜的完整性,增加ROS的产生,增加细胞膜的通透性,导致细胞内内容物的渗漏来实现。这些发现证明CZ@Ag具有很大的抗菌治疗可能性,为开发高效的声敏剂提供了可行的方向。
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引用次数: 0
Synergistic eradication of drug-resistant bacteria by rhamnolipids and pyocyanin via combined membrane permeabilization and oxidative stress 鼠李糖脂和花青素联合膜渗透和氧化应激协同消灭耐药细菌
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-06 DOI: 10.1016/j.colsurfb.2026.115418
Li Luo , Deyu Zhang , Mengqian Zhao , Jing Chen , Jian Yin , Xuwei Long
The threat of antimicrobial resistance (AMR) necessitates novel approaches against multidrug-resistant pathogens. This study pioneers a synergistic antibacterial strategy using rhamnolipids (RLs), a membrane-disrupting biosurfactant, and pyocyanin (Pyo), a redox-active compound, both produced by Pseudomonas aeruginosa. Results demonstrate that RLs compromise bacterial membrane and biofilm integrity, enhancing Pyo penetration. Intracellular Pyo then induces lethal oxidative stress via ROS generation and respiration inhibition. The combination exhibits remarkable synergy (FICI ≤0.375), reducing the required Pyo concentration by 16–64-fold against resistant strains. This dual-agent system not only ensures effective antibacterial activity but also maintains low mammalian cell cytotoxicity. Through complementary, lower-risk mechanisms, the RLs/Pyo pair presents a promising platform for treating intractable infections.
抗菌素耐药性(AMR)的威胁需要针对多重耐药病原体的新方法。这项研究开创了一种协同抗菌策略,使用鼠李糖脂(RLs),一种破坏膜的生物表面活性剂,和花青素(Pyo),一种氧化还原活性化合物,两者都由铜绿假单胞菌产生。结果表明,RLs损害了细菌膜和生物膜的完整性,增强了Pyo的渗透。然后,胞内Pyo通过ROS生成和呼吸抑制诱导致死性氧化应激。该组合对耐药菌株具有显著的协同作用(FICI≤0.375),可将所需的Pyo浓度降低16 - 64倍。这种双药系统不仅保证了有效的抗菌活性,而且保持了较低的哺乳动物细胞毒性。通过互补、低风险的机制,RLs/Pyo组合为治疗难治性感染提供了一个有希望的平台。
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引用次数: 0
Mechanically robust zwitterionic hydrogel coating reinforced by microgels for antibacterial and anticoagulant applications 机械坚固两性离子水凝胶涂层增强微凝胶抗菌和抗凝应用
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-06 DOI: 10.1016/j.colsurfb.2026.115422
Haiyang Chai , Kai Cheng , Jiru Miao , Longxing Niu , Xiao Cen , Ying Xiao , Feiyu Chen , Rong Wang
Nosocomial infections and thrombosis associated with implantable medical devices have emerged as increasingly critical clinical challenges. Antifouling hydrogels, owing to their biocompatibility and highly hydrophilic surfaces, have garnered significant attention as a promising strategy to mitigate these complications. However, conventional hydrogels often suffer from poor mechanical strength due to their high-water content and the absence of efficient energy dissipation mechanisms, leading to weak adhesion to underlying substrates and potential detachment under physiological conditions. In this study, vinyl-functionalized poly(N-isopropylacrylamide-co-acrylic acid) microgels were incorporated into polysulfobetaine hydrogel networks to overcome these limitations. The microgels enhanced the crosslinking density to improve the mechanical strength of the hydrogels, acted as sacrificial bonds for energy dissipation, and functioned as carriers for antibacterial agents. The polysulfobetaine hydrogel coating effectively reduced the friction coefficient and significantly improved antibacterial and anti-platelet adhesion performance. Moreover, antimicrobial-loaded microgels imparted the hydrogel coating with enhanced antibacterial functionality. The in vivo anticoagulant performance of the hydrogel-coated catheter was validated through implantation into the external jugular vein of rabbits, confirming its therapeutic potential. This multifunctional hydrogel coating strategy presents a promising avenue for the development of mechanically robust, antibacterial, and anticoagulant surface modifications for implantable biomedical devices.
与植入式医疗器械相关的医院感染和血栓形成已成为日益严峻的临床挑战。防污水凝胶,由于其生物相容性和高度亲水性的表面,已经获得了显著的关注,作为一个有希望的策略,以减轻这些并发症。然而,传统的水凝胶由于含水量高,缺乏有效的能量耗散机制,往往存在机械强度较差的问题,导致其在生理条件下与底物的粘附能力较弱,可能发生脱落。在本研究中,乙烯基功能化聚(n -异丙基丙烯酰胺-共丙烯酸)微凝胶被纳入聚磺基甜菜碱水凝胶网络,以克服这些局限性。微凝胶增强交联密度,提高水凝胶的机械强度,作为牺牲键耗散能量,并作为抗菌剂的载体。聚磺胺甜菜碱水凝胶涂层有效降低了摩擦系数,显著提高了抗菌和抗血小板粘附性能。此外,负载抗菌剂的微凝胶赋予水凝胶涂层增强的抗菌功能。通过植入家兔颈外静脉,验证了水凝胶包覆导管的体内抗凝性能,证实了其治疗潜力。这种多功能水凝胶涂层策略为开发用于植入式生物医学设备的机械坚固、抗菌和抗凝表面改性提供了一条有前途的途径。
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引用次数: 0
Recent advances in hydrogel therapy for traumatic brain injury 水凝胶治疗外伤性脑损伤的最新进展。
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-06 DOI: 10.1016/j.colsurfb.2026.115424
Zheng Zou , Mengjia Chen , Jun Liu , Huan Ma , Guobiao Liang , Jingyuan Li
Traumatic brain injury (TBI) remains one of the most devastating neurological disorders, characterized by complex primary mechanical damage and secondary cascades involving inflammation, oxidative stress, and glial scar formation. Conventional therapies offer limited efficacy due to the blood–brain barrier, the inability to reconstruct tissue defects, and poor spatiotemporal drug control. Hydrogels have emerged as a versatile platform for brain repair owing to their high-water content, biocompatibility, tunable mechanics, and injectability. By tailoring their composition and crosslinking mechanisms, hydrogels can mimic the native brain extracellular matrix, fill irregular cavities, and provide mechanical support that matches neural tissue softness. More importantly, functional hydrogels serve as local delivery vehicles for neuroprotective drugs and growth factors, scaffolds for stem cell transplantation, and active regulators of the post-injury microenvironment. Recent advances include bioactive, conductive, and stimuli-responsive hydrogels capable of modulating immune polarization, enhancing angiogenesis, and promoting neurogenesis. Despite encouraging preclinical results, challenges remain in achieving long-term biocompatibility, precise degradation control, and scalable clinical translation. This review summarizes the current progress, underlying mechanisms, and emerging design strategies of hydrogel-based therapies for TBI, highlighting their potential as next-generation biomaterials for neuroregeneration and functional recovery.
创伤性脑损伤(TBI)是最具破坏性的神经系统疾病之一,其特点是复杂的原发性机械损伤和继发性级联反应,包括炎症、氧化应激和神经胶质瘢痕形成。由于血脑屏障,无法重建组织缺陷,以及药物时空控制差,传统疗法的疗效有限。水凝胶由于其高含水量、生物相容性、可调力学和可注射性而成为脑修复的通用平台。通过调整它们的组成和交联机制,水凝胶可以模拟天然的大脑细胞外基质,填充不规则的空洞,并提供与神经组织柔软度相匹配的机械支持。更重要的是,功能水凝胶可以作为神经保护药物和生长因子的局部递送载体,干细胞移植的支架,以及损伤后微环境的主动调节剂。最近的进展包括生物活性、导电性和刺激反应性水凝胶,能够调节免疫极化、增强血管生成和促进神经发生。尽管临床前结果令人鼓舞,但在实现长期生物相容性、精确降解控制和可扩展的临床转化方面仍然存在挑战。本文综述了目前基于水凝胶治疗TBI的进展、潜在机制和新兴设计策略,强调了它们作为下一代神经再生和功能恢复生物材料的潜力。
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引用次数: 0
Organic nano-quantum dots of salvianolic acid B modified with photosensitive cypate for diagnosis and treatment of myocardial 光敏cypate修饰丹参酚酸B有机纳米量子点诊断和治疗心肌
IF 5.6 2区 医学 Q1 BIOPHYSICS Pub Date : 2026-01-05 DOI: 10.1016/j.colsurfb.2026.115414
Na Wang , Ye Zhang , Wen Huang , Wei Du , Chunhua Ma , YuQiang Fang , Chunyu Zeng
Salvianolic acid B (SaB) demonstrates significant cardioprotective effects against myocardial ischemia–reperfusion injury (I/R). However, its clinical application is limited by rapid metabolism and poor bioavailability. To address this, we synthesized SaB-loaded organic quantum dots (SaB@qd) via a hydrothermal method and functionalized them with the near-infrared (NIR) dye cypate (SaB@qd@Cy). Proteomic analysis of cardiac tissues from I/R model rats identified SIRT2 as a key downregulated protein. Molecular docking and cell membrane chromatography confirmed SaB as a natural SIRT2 agonist, binding specifically to the SER-263 residue. SaB@qd@Cy enhanced myocardial SaB accumulation by 3.2-fold compared to free SaB (P < 0.01). In vivo, SaB@qd@Cy reduced the infarct area by 41 % (compared to 28 % reduction by mitochondrial-targeted CoQ10 nanoparticles) and attenuated inflammatory cytokine expression (IL-1β, TNF-α) via the SIRT2/NLRP3 pathway. Additionally, cypate enabled real-time NIR imaging of ischemic borders, with a temperature increase of 15.3 ± 1.2°C under 808 nm laser irradiation. This study presents a novel theranostic nanoplatform that integrates natural compounds with photoresponsive quantum dots for targeted therapy and intraoperative imaging in I/R management.
丹酚酸B (SaB)对心肌缺血再灌注损伤(I/R)具有显著的心脏保护作用。但其代谢快、生物利用度差,限制了其临床应用。为了解决这个问题,我们通过水热法合成了负载ab的有机量子点(SaB@qd),并用近红外(NIR)染料cypate (SaB@qd@Cy)对其进行了功能化。I/R模型大鼠心脏组织的蛋白质组学分析发现SIRT2是一个关键的下调蛋白。分子对接和细胞膜色谱证实SaB是一种天然的SIRT2激动剂,特异性结合SER-263残基。SaB@qd@Cy使心肌SaB积累增加3.2倍(P <; 0.01)。在体内,SaB@qd@Cy通过SIRT2/NLRP3途径减少了41 %的梗死面积(相比之下,线粒体靶向CoQ10纳米颗粒减少了28 %),并减弱了炎症细胞因子(IL-1β, TNF-α)的表达。此外,在808 nm激光照射下,cypate使缺血边界的实时近红外成像温度升高15.3 ± 1.2°C。本研究提出了一种新的治疗纳米平台,该平台将天然化合物与光响应量子点结合起来,用于I/R管理中的靶向治疗和术中成像。
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引用次数: 0
期刊
Colloids and Surfaces B: Biointerfaces
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