Biomimetic Nanostructured Polyimine Aerogels with Graded Porosity, Flame Resistance, Intrinsic Superhydrophobicity, and Closed-Loop Recovery

ACS Nano, Год журнала: 2024, Номер 18(52), С. 35465 - 35479

Опубликована: Дек. 16, 2024

Polymer aerogels, with their porous and lightweight features, excel in applications such as energy storage, absorption, thermal insulation, making them a sought-after new material. However, the covalent cross-linking networks of current polymer aerogels result unsustainable manufacturing processing practices, persistently depleting our finite natural resources causing significant global environmental impacts. Herein, we have constructed high-performance dynamic aerogel network using biobased materials, its structure green sustainability akin to those plants nature. Abundant reversible points endow ultrafast degradation capabilities, enabling allow for closed-loop chemical monomer recovery reprocessing. Furthermore, utilizing highly active network, net-zero emission material reuse reprocessing can be achieved. Additionally, controlled features multilevel roughness nanostructured surface similar lotus leaf biomimetic pore structure, contributing anisotropy. The distinctive composition high compressive strength (2.2 MPa) vertically, low conductivity (0.0257 W/(m·K)) horizontally, outstanding fire resistance (LOI is 36%). Notably, demonstrates highest hydrophobicity among polyimine contact angle 154°. excellent performance variety potential oil–water separation, directional transport, phase change it anticipated that these will greatly benefit from systematic upgrades recyclability

Язык: Английский

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Self‐Oxygenated Hydrogel Enhances Immune Cell Response and Infiltration Via Triggering Dual DNA Damage to Activate cGAS‐STING and Inhibiting CAFs

Small, Год журнала: 2024, Номер 20(45)

Опубликована: Июль 25, 2024

Abstract Immune checkpoint inhibitors (ICIs) offer promise in breaking through the treatment and survival dilemma of triple‐negative breast cancer (TNBC), yet only immunomodulatory subtype ≈5% TNBC patients respond as monotherapy due to lack effector immune cells (internal problem) physical barrier (external limitation) formed by cancer‐associated fibroblasts (CAFs). A hydrogel drug‐delivery platform, ALG@TBP‐2/Pt(0)/nintedanib (ALG@TPN), is designed induce strong functions dual elimination internal external tumor microenvironment (TME). Activated white light, type I II photodynamic therapy (PDT), TBP‐2 generates large amounts reactive oxygen species (ROS) intracellularly, oxidizing mitochondrial DNA (mtDNA). The unique catalase activity Pt(0) converts endogenous H 2 O , reducing anoxia‐limiting PDT enhancing ROS generation efficacy. Abundant can oxidize cytotoxic Pt(II), damaging nuclear (nDNA). Dual damage mtDNA nDNA might bi‐directionally activate cGAS/STING pathway enhance cell response. Besides, nintedanib demonstrates a significant inhibitory effect on CAFs, weakening deepening infiltration. Overall, study provides self‐oxygenating with “PDT/chemotherapy/anti‐CAFs” effect, triggering reshape TME. Both interventions increase anti‐TNBC responses.

Язык: Английский

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Gelation Behavior and Drug Sustained-Release Properties of a Helix Peptide Organohydrogel with pH Responsiveness

Langmuir, Год журнала: 2024, Номер 40(16), С. 8568 - 8579

Опубликована: Апрель 9, 2024

Based on the typical similar repeat units (abcdefg)n of α-helical structure, peptide H was designed to self-assemble into an organohydrogel in response pH. Depending different pH, proportions secondary microstructure, and mechanical properties gel were investigated. Circular dichroism (CD) Fourier transform infrared (FT-IR) showed that proportion structure gradually increased become dominant with increase Combining transmission electron microscopy (TEM) atomic force (AFM), it found ordered α-helix promoted fiber formation. The further pH changed intermolecular forces, resulting content enhancement helix–helix interaction, causing fibers converge thicker more dense ones. temperature test stable rheological between 20–60 °C. Drug release cytotoxicity DOX-loaded could have a better acidic environment, indicating its potential application as drug local delivery carrier.

Язык: Английский

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Self‐Assembled Metal Complexes in Biomedical Research

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 23, 2024

Abstract Cisplatin is widely used in clinical cancer treatment; however, its application often hindered by severe side effects, particularly inherent or acquired resistance of target cells. To address these challenges, an effective strategy to modify the metal core complex and introduce alternative coordination modes valence states, leading development a series complexes, such as platinum (IV) prodrugs cyclometalated complexes. Recent advances nanotechnology have facilitated multifunctional nanomaterials that can selectively deliver drugs tumor cells, thereby overcoming pharmacological limitations metal‐based drugs. This review first explores self‐assembly complexes into spherical, linear, irregular nanoparticles context biomedical applications. The mechanisms underlying are subsequently analyzed, followed discussion their applications fields, including detection, imaging, antitumor research.

Язык: Английский

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Recent advances of injectable in situ-forming hydrogels for preventing postoperative tumor recurrence

Drug Delivery, Год журнала: 2024, Номер 31(1)

Опубликована: Сен. 10, 2024

The unavoidable residual tumor tissue from surgery and the strong aggressiveness of cells pose challenges to postoperative treatment patients, accompanied by in situ recurrence decreased quality life. Therefore, there is an urgent need explore appropriate therapeutic strategies remove after inhibit metastasis surgery. In recent years, with rapid development biomedical materials, study local delivery systems as agents has gradually attracted attention researchers. Injectable situ-forming hydrogel a locally administered agent injected solution that can be loaded various rapidly gels form semi-solid gel at site. This type tightly fills surgical site covers irregular excision surfaces. this paper, we review advances application injectable hydrogels therapy, focusing on matrix materials its different types tumors, well discussing prospects clinical application.

Язык: Английский

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Peptide hydrogel platform encapsulating manganese ions and high-density lipoprotein nanoparticle-mimicking nanovaccines for the prevention and treatment of gastric cancer

Journal of Translational Medicine, Год журнала: 2025, Номер 23(1)

Опубликована: Март 25, 2025

Advanced gastric cancer remains a significant global health challenge, with limited therapeutic options available. In contrast, immunotherapy have emerged as promising alternatives, offering greater potency in treating advanced cancer. However, the development of novel and efficient immunotherapeutic strategy is crucial to enhance body's immune response against This study developed single-injection peptide hydrogel-based nanovaccine therapy for treatment. The utilizes RADA32 hydrogel, which sensitive metal ion concentration, encapsulate manganese ions HPPS nanovaccines. nanovaccines contain antigen CpG-ODN, designed activate both toll-like receptor 9 (TLR9) cGAS-STING signaling pathways antigen-presenting cells. design aims facilitate stable sustained release nanovaccine, thereby enhancing effective recognition antigens. efficacy system was confirmed using model OVA cancer-specific MG7-related peptide. results demonstrated that effectively activated response, leading enhanced activation TLR9 cells observed highlighting potential this approach stimulate robust presents clinical anti-tumor vaccine administration, prevention treatment provides convenient method could potentially be expanded other types cancer, providing versatile platform immunotherapy.

Язык: Английский

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A Water State Manipulation Strategy for Ultra‐Stiff Yet Highly Sensitive Hydrogels

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Abstract Hydrogels in water or aqueous solutions swell shrink unidirectionally until reaching an equilibrium state, which has been extensively studied through both experimental analysis and theoretical prediction. In this work, unexpected concurrent swelling deswelling behavior of hydrogels is reported, manipulates the state polymer networks. The osmotic pressure‐driven rapid ionic electrostatic repulsion‐driven slow occur simultaneously, affording double‐layered polyacrylamide (PAM) hydrogels, rigid inner layer does not contains free water, while soft outer comprises bound water. PAM show uniaxial tensile fracture strengths Young's moduli up to 104.2 MPa 2.4 GPa, respectively, outperforming various polymeric biological structural materials. This strategy applicable general molding three‐dimensional (3D) printing techniques, providing wide possibilities for engineering applications. Such strong can simultaneously serve as materials load‐bearing act functional super‐stress (25 6000 N) highly adaptable tactile sensing. These findings enrich hydrogel swell/deswelling theory broaden applications

Язык: Английский

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The Optimization of Culture Conditions for Injectable Recombinant Collagen Hydrogel Preparation Using Machine Learning

Gels, Год журнала: 2025, Номер 11(2), С. 141 - 141

Опубликована: Фев. 17, 2025

Injectable recombinant collagen hydrogels (RCHs) are crucial in biomedical applications. Culture conditions play an important role the preparation of hydrogels. However, determining characteristics under certain and optimal swiftly still remain challenging tasks. In this study, a machine learning approach was introduced to explore correlation between hydrogel culture determine conditions. The study focused on four key factors as independent variables: initial substrate concentration, reaction temperature, pH level, time, while dependent variable elastic modulus To analyze impact these modulus, mathematical models were employed, including multiple linear regression (ML), decision tree (DT), support vector (SVM), neural network (NN). theoretical outputs NN closest actual values. Therefore, proved be most suitable model. Subsequently, identified concentration 15% (W/V), temperature 4 °C, 7.0, time 12 h. prepared specific exhibited predicted 15,340 Pa, approaching that natural cartilage.

Язык: Английский

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Nano-immunomodulators for multi-pathway regulation of immunosuppressive microenvironment of colorectal cancer

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161104 - 161104

Опубликована: Фев. 1, 2025

Язык: Английский

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RSM and ANN modeling-based optimization approach for the development of alginate-chitosan particles containing Rosmarinus officinalis essential oil

Polymer Bulletin, Год журнала: 2025, Номер unknown

Опубликована: Март 22, 2025

Язык: Английский

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