Pub Date : 2026-01-07DOI: 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.
{"title":"High efficacy and biocompatibility: Application and biological evaluation of LA67 liposome in colon cancer therapy","authors":"Nuoya Wang , Jingyuan Wang , Zhenghu Yuan , Zhonggao Gao , Mingji Jin , Minhu Cui","doi":"10.1016/j.colsurfb.2026.115429","DOIUrl":"10.1016/j.colsurfb.2026.115429","url":null,"abstract":"<div><div>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 <em>in vitro</em> 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 <em>in vivo</em> 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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"261 ","pages":"Article 115429"},"PeriodicalIF":5.6,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-06DOI: 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.
{"title":"Engineered dialdehyde dextran/quaternized chitosan hydrogel incorporating myricetin nanoparticles for diabetic oral wound management","authors":"Xiaoqian Du , Huijie Zhang , Bo Li , Wei Dong , Shengye You","doi":"10.1016/j.colsurfb.2026.115421","DOIUrl":"10.1016/j.colsurfb.2026.115421","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"261 ","pages":"Article 115421"},"PeriodicalIF":5.6,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-06DOI: 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.
{"title":"Enhancing properties of damaged hair through moisture control via construction of highly hydrophobic surface","authors":"Fubing Liu , Chaohai Li , Jinhua Li , Jing Wang , Kuan Chang","doi":"10.1016/j.colsurfb.2026.115427","DOIUrl":"10.1016/j.colsurfb.2026.115427","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"261 ","pages":"Article 115427"},"PeriodicalIF":5.6,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-06DOI: 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.
{"title":"Fabrication of SilMA hydrogels with stiffness gradients for soft-to-hard interface tissue engineering","authors":"Siyuan Liu , Xialing Tu , Jiaxuan Huang , Nianjie Wu , Bin Xia , Guobao Chen","doi":"10.1016/j.colsurfb.2026.115425","DOIUrl":"10.1016/j.colsurfb.2026.115425","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"260 ","pages":"Article 115425"},"PeriodicalIF":5.6,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145931700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-06DOI: 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.
{"title":"Osteoinductive sandwich-structured HA/PEEK implant for rapid critical-size skull repair","authors":"Mei-li Qi , Kunshan Yuan , Enhui Song , Xiangyi Feng , Tianheng Lu , Lin Zhao , Haihong Guo , Haijun Zhang","doi":"10.1016/j.colsurfb.2026.115428","DOIUrl":"10.1016/j.colsurfb.2026.115428","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"261 ","pages":"Article 115428"},"PeriodicalIF":5.6,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-06DOI: 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.
{"title":"ZIF-8-based Schottky heterojunction for boosting the sonodynamic antimicrobial effect of chlorin e6 on MRSA","authors":"Xiaoyang Xu , Danni Wang , Bingjie Leng , Tingting Gao , Zhenning Cui , Xiao Wang , Bin Liu","doi":"10.1016/j.colsurfb.2026.115419","DOIUrl":"10.1016/j.colsurfb.2026.115419","url":null,"abstract":"<div><div>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 <em>Staphylococcus aureus</em> (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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"260 ","pages":"Article 115419"},"PeriodicalIF":5.6,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-06DOI: 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.
{"title":"Synergistic eradication of drug-resistant bacteria by rhamnolipids and pyocyanin via combined membrane permeabilization and oxidative stress","authors":"Li Luo , Deyu Zhang , Mengqian Zhao , Jing Chen , Jian Yin , Xuwei Long","doi":"10.1016/j.colsurfb.2026.115418","DOIUrl":"10.1016/j.colsurfb.2026.115418","url":null,"abstract":"<div><div>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 <em>Pseudomonas aeruginosa</em>. Results demonstrate that RLs compromise bacterial membrane and biofilm integrity, enhancing Pyo penetration. Intracellular Pyo then induces lethal oxidative stress <em>via</em> 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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"261 ","pages":"Article 115418"},"PeriodicalIF":5.6,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-06DOI: 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.
{"title":"Mechanically robust zwitterionic hydrogel coating reinforced by microgels for antibacterial and anticoagulant applications","authors":"Haiyang Chai , Kai Cheng , Jiru Miao , Longxing Niu , Xiao Cen , Ying Xiao , Feiyu Chen , Rong Wang","doi":"10.1016/j.colsurfb.2026.115422","DOIUrl":"10.1016/j.colsurfb.2026.115422","url":null,"abstract":"<div><div>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(<em>N</em>-isopropylacrylamide-<em>co</em>-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 <em>in vivo</em> 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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"261 ","pages":"Article 115422"},"PeriodicalIF":5.6,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-06DOI: 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.
{"title":"Recent advances in hydrogel therapy for traumatic brain injury","authors":"Zheng Zou , Mengjia Chen , Jun Liu , Huan Ma , Guobiao Liang , Jingyuan Li","doi":"10.1016/j.colsurfb.2026.115424","DOIUrl":"10.1016/j.colsurfb.2026.115424","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"260 ","pages":"Article 115424"},"PeriodicalIF":5.6,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145931687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-05DOI: 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.
{"title":"Organic nano-quantum dots of salvianolic acid B modified with photosensitive cypate for diagnosis and treatment of myocardial","authors":"Na Wang , Ye Zhang , Wen Huang , Wei Du , Chunhua Ma , YuQiang Fang , Chunyu Zeng","doi":"10.1016/j.colsurfb.2026.115414","DOIUrl":"10.1016/j.colsurfb.2026.115414","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":279,"journal":{"name":"Colloids and Surfaces B: Biointerfaces","volume":"261 ","pages":"Article 115414"},"PeriodicalIF":5.6,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}