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核心技术专利:CN118964589B侵权必究
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Zn 颗粒复合纤维支架的制备及性能表征及其在组织修复和再生中的潜在应用。

Fabrication and Characterization of Zn Particle Incorporated Fibrous Scaffolds for Potential Application in Tissue Healing and Regeneration.

机构信息

Department of Chemical, Biological and Bioengineering, North Carolina A&T State University, Greensboro, North Carolina 27411, United States.

Department of Industrial and Systems Engineering, North Carolina A&T State University, Greensboro, North Carolina 27411, United States.

出版信息

ACS Appl Mater Interfaces. 2023 Oct 25;15(42):48913-48929. doi: 10.1021/acsami.3c09793. Epub 2023 Oct 17.


DOI:10.1021/acsami.3c09793
PMID:37847523
Abstract

Zinc (Zn) metal and its alloys have received a lot of interest in biomedical applications due to their biodegradability, biocompatibility, antimicrobial activity, and ability to stimulate tissue regeneration. Bulk Zn has been successfully utilized in a variety of implant applications, most notably as bioabsorbable cardiac stents and orthopedic fixation devices, where it provides adequate mechanical properties while also releasing helpful Zn ions (Zn) during degradation. Such beneficial ions are dose-dependent and, when released in excess, can induce cellular toxicity. In this study, we hypothesize that embedding Zn metal particles into a polymer nanofibrous scaffold will enable control of the degradation and time release of the Zn. We designed and fabricated two polymer scaffolds, polycaprolactone (PCL) and polycaprolactone-chitosan (PCL-CH). Each scaffold had an increasing amount of Zn. Several physicochemical properties such as fiber morphology, crystallinity, mechanical strength, hydrophilicity, degradation and release of Zn, thermal properties, chemical compositions, and so forth were characterized and compared with the PCL fibrous scaffold. The biological properties of the scaffolds were evaluated in vitro utilizing direct and indirect cytotoxicity assays and cell viability. All the data show that the addition of Zn changed various physical properties of the PCL and PCL-CH scaffolds except their chemical structure. Further investigation reveals that the PCL-CH scaffolds degrade the Zn particles relatively faster than the PCL because the presence of the hydrophilic CH influences the faster release of Zn in cell culture conditions as compared to the PCL fibrous scaffold. The combined advantages of CH and Zn in the PCL scaffold enriched 3T3 fibroblast cells' survival and proliferation except the ones with the higher concentration of Zn particles. These new composite scaffolds are promising and can be further considered for tissue healing and regeneration applications.

摘要

锌(Zn)金属及其合金因其可生物降解性、生物相容性、抗菌活性和刺激组织再生的能力,在生物医学应用中受到了广泛关注。块状锌已成功应用于多种植入物应用,尤其是作为生物可吸收的心脏支架和骨科固定装置,在这些应用中,它提供了足够的机械性能,同时在降解过程中释放出有益的锌离子(Zn)。这些有益的离子具有剂量依赖性,过量释放时会引起细胞毒性。在这项研究中,我们假设将锌金属颗粒嵌入聚合物纳米纤维支架中,将能够控制降解和锌的释放时间。我们设计并制造了两种聚合物支架,聚己内酯(PCL)和聚己内酯-壳聚糖(PCL-CH)。每个支架都含有越来越多的锌。我们对纤维形态、结晶度、机械强度、亲水性、锌的降解和释放、热性能、化学成分等物理化学性质进行了表征和比较。支架的生物性能通过直接和间接细胞毒性试验和细胞活力评估在体外进行评估。所有数据均表明,除了化学结构外,添加锌改变了 PCL 和 PCL-CH 支架的各种物理性质。进一步的研究表明,由于亲水性 CH 的存在,PCL-CH 支架比 PCL 更快地降解 Zn 颗粒,因为与 PCL 纤维支架相比,它在细胞培养条件下更快地释放 Zn。与仅含有 PCL 纤维支架的情况相比,PCL 支架中 CH 和 Zn 的组合优势提高了 3T3 成纤维细胞的存活率和增殖率,除了含有更高浓度 Zn 颗粒的情况。这些新型复合支架具有广阔的应用前景,可进一步考虑用于组织愈合和再生应用。

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引用本文的文献

[1]
Electrospun Polycaprolactone-Gelatin Fibrils Enabled 3D Hydrogel Microcapsules for Biomedical Applications.

J Funct Biomater. 2025-3-2

[2]
Enhanced Cell Proliferation, Migration, and Fibroblast Differentiation with Electrospun PCL-Zinc Scaffolds Coated with Fibroblast-Derived ECM.

ACS Omega. 2025-1-28

[3]
New Generation of Osteoinductive and Antimicrobial Polycaprolactone-Based Scaffolds in Bone Tissue Engineering: A Review.

Polymers (Basel). 2024-6-12

[4]
Bridging Nanomanufacturing and Artificial Intelligence-A Comprehensive Review.

Materials (Basel). 2024-4-2

[5]
3D Printing of Biodegradable Polymeric Microneedles for Transdermal Drug Delivery Applications.

Pharmaceutics. 2024-2-6

[6]
The 3D Printing of Nanocomposites for Wearable Biosensors: Recent Advances, Challenges, and Prospects.

Bioengineering (Basel). 2023-12-27

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