ACS Biomaterials Science & Engineering
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2025
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IF 5.5
Yupu Yang,Yu Liu,Shengmiao Wang,Xinyu Feng,Jing Lan,Zheqin Dong
Tooth extraction often leads to significant alveolar bone resorption, posing a major clinical challenge that compromises subsequent prosthodontic rehabilitation. This impaired bone regenerative capacity is primarily attributed to excessive reactive oxygen species (ROS), insufficient angiogenesis, and inadequate osteoinductive stimulation within the socket, collectively delaying the healing process. To address this, we developed an injectable dual-network hydrogel system loaded with metal–organic framework (MOF) and osteogenic growth peptide (OGP) to promote the tooth extraction socket healing. The double-network hydrogel, composed of gelatin methacryloyl (GelMA) and oxidized dextran (ODex), forms a dynamic network through the Schiff base reaction between the amino groups of GelMA and the aldehyde groups of ODex, enabling injectability and adaptation to the irregular shape of the socket, while the second covalent network, formed by photo-cross-linking, enhances its mechanical properties. Besides, MOF decomposes to release magnesium ion (Mg2+) and gallic acid (GA) to eliminate excess ROS and promote endothelial cell differentiation, facilitating angiogenesis, while OGP is an efficient osteoinductive agent. In vitro studies demonstrate that the composite hydrogel system efficiently exerts antioxidant properties to eliminate ROS, promotes angiogenesis, and enhances osteogenesis. Moreover, in vivo trials show that the composite hydrogel facilitates angiogenesis and bone formation in the tooth extraction socket, ultimately promoting the bone repair process.
研究领域:
生物材料
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组织工程
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牙科医学
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再生医学
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纳米技术
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Cancer Cell International
·
2024
·Vol. 24
·期 1
·1-15
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IF 5.3
Cen Lanqi,Zhang Zhe,Sun Yi,Wu Nandie,Shao Jie,Qian Zhaoye,Tian Manman,Ke Yaohua,Liu Baorui
Background The clinical application of peptide vaccines in tumor immunotherapy holds significant promise. Peptide-based tumor vaccines are currently subject to certain limitations in clinical trials, including the challenge of inducing a sustained response from CD4 + T helper cells and cytotoxic T lymphocytes (CTL), as well as human leukocyte antigen (HLA) restrictions. Methods Through the utilization of biological information methodology, a screening process was conducted to identify three potential long peptides that are specifically targeted by the MAGE-A4 antigen. The candidate long peptides were subjected to in vitro testing using human peripheral blood lymphocytes as samples to evaluate their immunogenicity and immune function. The antitumor properties and preliminary mechanism of the long peptide vaccine were investigated through the use of a mouse model designed for the prevention of triple negative breast cancer (TNBC). Results Three predicted multi-epitope long peptides targeting MAGE-A4 have shown to have a strong immunogenicity, with a total positive rate of 72% across different HLA subtypes in Chinese populations. they can also increase the levels of the costimulatory factor CD137 and tumor necrosis factor-alpha (TNF-α), activate T cells, and boost the cytotoxic activity. Results from an animal study have revealed that the long-peptide vaccine, both on its own and in combination with R848, has displayed impressive anti-tumor and target-specific capabilities. Moreover, it has the ability to increase the expression of effector memory T cells and central memory T cells. Conclusions This study was the first to screen three multi-epitope long peptides targeting MAGE-A4 and assess their immunogenicity, immune function, and potential as adjuvant peptides. The results showed that the MAGE-A4 long peptide vaccine can be used as a novel immunoprophylaxis method to prevent TNBC. Moreover, the proposed development model is capable of screening multiple target antigens, which lead to its clinical application.
研究领域:
肿瘤学
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免疫学
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疫苗学
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产品关联
DOI
PubMed
高影响因子
Military Medical Research
·
2023
·Vol. 10
·期 1
·1-23
·
IF 21.1
Yu Yong-Lin,Wu Jun-Jie,Lin Chuan-Chuan,Qin Xian,Tay Franklin R.,Miao Li,Tao Bai-Long,Jiao Yang
Background Treatment of methicillin-resistant Staphylococcus aureus (MRSA) biofilm infections in implant placement surgery is limited by the lack of antimicrobial activity of titanium (Ti) implants. There is a need to explore more effective approaches for the treatment of MRSA biofilm infections.Methods Herein, an interfacial functionalization strategy is proposed by the integration of mesoporous polydopamine nanoparticles (PDA), nitric oxide (NO) release donor sodium nitroprusside (SNP) and osteogenic growth peptide (OGP) onto Ti implants, denoted as Ti-PDA@SNP-OGP. The physical and chemical properties of Ti-PDA@SNP-OGP were assessed by scanning electron microscopy, X-ray photoelectron spectroscope, water contact angle, photothermal property and NO release behavior. The synergistic antibacterial effect and elimination of the MRSA biofilms were evaluated by 2′,7′-dichlorofluorescein diacetate probe, 1-N-phenylnaphthylamine assay, adenosine triphosphate intensity, o-nitrophenyl-β-d-galactopyranoside hydrolysis activity, bicinchoninic acid leakage. Fluorescence staining, assays for alkaline phosphatase activity, collagen secretion and extracellular matrix mineralization, quantitative real‑time reverse transcription‑polymerase chain reaction, and enzyme-linked immunosorbent assay (ELISA) were used to evaluate the inflammatory response and osteogenic ability in bone marrow stromal cells (MSCs), RAW264.7 cells and their co-culture system. Giemsa staining, ELISA, micro-CT, hematoxylin and eosin, Masson’s trichrome and immunohistochemistry staining were used to evaluate the eradication of MRSA biofilms, inhibition of inflammatory response, and promotion of osseointegration of Ti-PDA@SNP-OGP in vivo.Results Ti-PDA@SNP-OGP displayed a synergistic photothermal and NO-dependent antibacterial effect against MRSA following near-infrared light irradiation, and effectively eliminated the formed MRSA biofilms by inducing reactive oxygen species (ROS)-mediated oxidative stress, destroying bacterial membrane integrity and causing leakage of intracellular components (P < 0.01). In vitro experiments revealed that Ti-PDA@SNP-OGP not only facilitated osteogenic differentiation of MSCs, but also promoted the polarization of pro-inflammatory M1 macrophages to the anti-inflammatory M2-phenotype (P < 0.05 or P < 0.01). The favorable osteo-immune microenvironment further facilitated osteogenesis of MSCs and the anti-inflammation of RAW264.7 cells via multiple paracrine signaling pathways (P < 0.01). In vivo evaluation confirmed the aforementioned results and revealed that Ti-PDA@SNP-OGP induced ameliorative osseointegration in an MRSA-infected femoral defect implantation model (P < 0.01).Conclusion sThese findings suggest that Ti-PDA@SNP-OGP is a promising multi-functional material for the high-efficient treatment of MRSA infections in implant replacement surgeries.
研究领域:
生物材料
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生物医学工程
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微生物学
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免疫学
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骨科
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产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
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2021
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IF 7.991
Chengzhe Gao,Zongliang Wang,Zixue Jiao,Zhenxu Wu,Min Guo,Yu Wang,Jianguo Liu,Peibiao Zhang
The overall aim of the current study is to develop a dual-functional PEEK implant to simultaneously fight off bacterial contamination and promote osseointegration by sustained release of moxifloxacin hydrochloride (MOX) and osteogenic growth peptide (OGP) from mussel-inspired polydopamine (PDA)-coated porous sulfonated PEEK (SPK) surface. Our study revealed that the MOX/OGP PDA-modified SPK (SPD-MOX/OGP) surface exhibited a durable and excellent antibacterial effect against planktonic/adherent Staphylococcus aureus and Escherichia coli in vitro . A remarkable enhancement in specific cell adhesion, proliferation and osteogenicity were observed on the SPD-MOX/OGP substrate due to the presence of OGP and PDA molecules compared to all other groups. More significantly, using the infected and non-infected rat tibia models confirmed the in vivo antimicrobial and osteogenesis abilities of SPD-MOX/OGP. Therefore, we are confident that such dual-functional PEEK surface with both antibacterial and osseointegrative capacities in this study would give a positive answer to periprosthetic joint infection-related issues.
研究领域:
生物材料
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生物医学工程
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骨科
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传染病
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Bailong Tao,Chuanchuan Lin,Ye He,Zhang Yuan,Maowen Chen,Kun Xu,Kai Li,Ai Guo,Kaiyong Cai,Lixue Chen
Bacterial infection and the resulting inflammation response not only affect the functions of osteogenic-relative cells but also lead to the failure of titanium (Ti)-based implantation. It is urgent to develop multifunctional (antimicrobial, anti-inflammation, and pre-osteogenesis) titanium implants to address this tissue. Herein, an osteogenic growth peptide (OGP) loaded zeolitic imidazolate frameworks-67 (ZIF-67) coating was fabricated on titanium dioxide nanotubes (TNTs) to prepare a [email protected] surface. The [email protected] coating was rapidly dissolved under an acidic environment with pH-sensitive property. Moreover, the [email protected] displayed a strong antibacterial activity against Escherichia coli ( E. coli ), Staphylococcus aureus ( S. aureus ), Streptococcus mutans ( S. mutans ), and methicillin-resistant Staphylococcus aureus ( MRSA ) owing to the hydrolysis of ZIF-67 nanoparticles and the formation of an alkaline microenvironment. The implants had good biocompatibility toward mesenchymal stromal cells (MSCs) and macrophages. Notably, the [email protected] could suppress the inflammatory response and simultaneously improve the cellular differentiation of MSCs under an inflammatory environment. In vivo study further revealed that [email protected] implants presented strong antimicrobial and anti-inflammatory properties at the early stage of implantation, thereby enhancing the osteointegration of bone-implant at the late stage. Thus, this multifunctional Ti implant combining osteoimmunomodulatory and antibacterial effects is a promising candidate for implant-associated infectious bone regeneration.
研究领域:
材料科学
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生物医学工程
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生物材料
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骨科
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免疫学
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DOI
高影响因子
危险品化学品经营许可证（带存储）