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Tian X, Shi A, Wu J. Construction of biomimetic-responsive nanocarriers and their applications in tumor targeting. Anticancer Agents Med Chem 2022; 22:2255-2273. [PMID: 34994336 DOI: 10.2174/1871520622666220106105315] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/11/2021] [Accepted: 12/03/2021] [Indexed: 11/22/2022]
Abstract
Backgroud:At present, the tumor is still the leading cause of death. Biomimetic nanocarriers for precision cancer therapy are attracting increasing attention. Nanocarriers with a good biocompatible surface could reduce the recognition and elimination of nanoparticles as foreign substances by the immune system, offer specific targeting, and improve the efficacy of precision medicine for tumors, thereby providing outstanding prospects for application in cancer therapy. In particular, cell membrane biomimetic camouflaged nanocarriers have become a research hotspot because of their excellent biocompatibility, prolonged circulation in the blood, and tumor targeting. Objective:To summarize the biological targeting mechanisms of different cell membrane-encapsulated nanocarriers in cancer therapy. In this article, the characteristics, application, and stage of progress of bionic encapsulated nanocarriers for different cell membranes are discussed, as are the field's developmental prospects. Methods:The findings on the characteristics of bionic encapsulated nanocarriers for different cell membranes and tumor treatment have been analyzed and summarized. Results:Biomimetic nanosystems based on various natural cell and hybrid cell membranes have been shown to efficiently control targeted drug delivery systems. They can reduce immune system clearance, prolong blood circulation time, and improve drug loading and targeting, thereby enhancing the diagnosis and treatment of tumors and reducing the spread of CTCs. Conclusion:With advances in the development of biomimetic nanocarrier DDSs, novel ideas for tumor treatment and drug delivery have been developed. However, there are still some problems in biomimetic nanosystems. Therefore, it needs to be optimized through further research, from the laboratory to the clinic for the benefit of a wide range of patients.
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Affiliation(s)
- Xuexia Tian
- Department of Basic Medical Yunnan University of Chinese Medicine 650500, China
| | - Anhua Shi
- Department of Basic Medical Yunnan University of Chinese Medicine 650500, China
| | - Junzi Wu
- Department of Basic Medical Yunnan University of Chinese Medicine 650500, China
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You X, Casper CB, Lentz EE, Erie DA, Atkin JM. Fabrication of a Biocompatible Mica/Gold Surface for Tip-Enhanced Raman Spectroscopy. Chemphyschem 2020; 21:188-193. [PMID: 31912640 PMCID: PMC7027439 DOI: 10.1002/cphc.201901002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/24/2019] [Indexed: 11/29/2022]
Abstract
Tip‐enhanced Raman spectroscopy (TERS) is a promising technique for structural studies of biological systems and biomolecules, owing to its ability to provide a chemical fingerprint with sub‐diffraction‐limit spatial resolution. This application of TERS has thus far been limited, due to difficulties in generating high field enhancements while maintaining biocompatibility. The high sensitivity achievable through TERS arises from the excitation of a localized surface plasmon resonance in a noble metal atomic force microscope (AFM) tip, which in combination with a metallic surface can produce huge enhancements in the local optical field. However, metals have poor biocompatibility, potentially introducing difficulties in characterizing native structure and conformation in biomolecules, whereas biocompatible surfaces have weak optical field enhancements. Herein, a novel, biocompatible, highly enhancing surface is designed and fabricated based on few‐monolayer mica flakes, mechanically exfoliated on a metal surface. These surfaces allow the formation of coupled plasmon enhancements for TERS imaging, while maintaining the biocompatibility and atomic flatness of the mica surface for high resolution AFM. The capability of these substrates for TERS is confirmed numerically and experimentally. We demonstrate up to five orders of magnitude improvement in TERS signals over conventional mica surfaces, expanding the sensitivity of TERS to a wide range of non‐resonant biomolecules with weak Raman cross‐sections. The increase in sensitivity obtained through this approach also enables the collection of nanoscale spectra with short integration times, improving hyperspectral mapping for these applications. These mica/metal surfaces therefore have the potential to revolutionize spectromicroscopy of complex, heterogeneous biological systems such as DNA and protein complexes.
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Affiliation(s)
- Xiao You
- Department of Applied Physical Science, University of North Carolina at Chapel Hill, Caudill Labs, Chapel Hill, North Carolina, 27514, U.S.A
| | - Clayton B Casper
- Department of Chemistry, University of North Carolina at Chapel Hill, Caudill Labs, Chapel Hill, North Carolina, 27514, U.S.A
| | - Emily E Lentz
- Department of Chemistry, University of North Carolina at Chapel Hill, Caudill Labs, Chapel Hill, North Carolina, 27514, U.S.A
| | - Dorothy A Erie
- Department of Chemistry, University of North Carolina at Chapel Hill, Caudill Labs, Chapel Hill, North Carolina, 27514, U.S.A
| | - Joanna M Atkin
- Department of Chemistry, University of North Carolina at Chapel Hill, Caudill Labs, Chapel Hill, North Carolina, 27514, U.S.A
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Qian Y, Qi F, Chen Q, Zhang Q, Qiao Z, Zhang S, Wei T, Yu Q, Yu S, Mao Z, Gao C, Ding Y, Cheng Y, Jin C, Xie H, Liu R. Surface Modified with a Host Defense Peptide-Mimicking β-Peptide Polymer Kills Bacteria on Contact with High Efficacy. ACS Appl Mater Interfaces 2018; 10:15395-15400. [PMID: 29688003 DOI: 10.1021/acsami.8b01117] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) has been one of the major nosocomial pathogens to cause frequent and serious infections that are associated with various biomedical surfaces. This study demonstrated that surface modified with host defense peptide-mimicking β-peptide polymer, has surprisingly high bactericidal activities against Escherichia coli ( E. coli) and MRSA. As surface-tethered β-peptide polymers cannot move freely to adopt the collaborative interactions with bacterial membrane and are too short to penetrate the cell envelop, we proposed a mode of action by diffusing away the cell membrane-stabilizing divalent ions, Ca2+ and Mg2+. This hypothesis was supported by our study that Ca2+ and Mg2+ supplementation in the assay medium causes up to 80% loss of bacterial killing efficacy and that the addition of divalent ion chelating ethylenediaminetetraacetic acid into the above assay medium leads to significant recovery of the bacterial killing efficacy. In addition to its potent bacterial killing efficacy, the surface-tethered β-peptide polymer also demonstrated excellent biocompatibility by displaying no hemolysis and supporting mammalian cell adhesion and growth. In conclusion, this study demonstrated the potential of β-peptide polymer-modified surface in addressing nosocomial infections that are associated with various surfaces in biomedical applications.
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Affiliation(s)
| | | | | | | | | | | | - Ting Wei
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Qian Yu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Shan Yu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Zhengwei Mao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | | | - Yanyong Cheng
- Department of Anesthesiology , Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , China
| | - Chenyu Jin
- Department of Anesthesiology , Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , China
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Li Q, Sun L, Zhang L, Xu Z, Kang Y, Xue P. Polydopamine-collagen complex to enhance the biocompatibility of polydimethylsiloxane substrates for sustaining long-term culture of L929 fibroblasts and tendon stem cells. J Biomed Mater Res A 2017; 106:408-418. [PMID: 28971550 DOI: 10.1002/jbm.a.36254] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 09/24/2017] [Accepted: 09/27/2017] [Indexed: 12/12/2022]
Abstract
Polydimethylsiloxane (PDMS) is a commercialized polymer extensively used in the fabrication of versatile microfluidic microdevices for studies in cell biology and tissue engineering. However, the inherent surface hydrophobicity of PDMS is not optimal for cell culture and thus restrains its applications for investigation of long-term behaviors of fibroblasts and stem cells. To improve the surface biocompatibility of PDMS, a facile technique was developed by modifying the PDMS surface with polydopamine-collagen (COL/PDA) complex. The successful synthesis of COL/PDA was verified through proton nuclear magnetic resonance spectroscopy. Compared to surface coating solely with COL or PDA, the surface wettability was significantly improved on COL/PDA-modified PDMS substrates based on water contact angle characterizations. The modified PDMS surface remarkably enhanced the initial adhesion and long-term proliferation of L929 fibroblasts and tendon stem cells (TSCs). Additionally, the effects of COL/PDA coating on cell viability and apoptosis were further investigated under prolonged incubation. We found that the COL/PDA coating on PDMS resulted in a substantial increase of cell viability compared to native PDMS, and the cell apoptosis was considerably impeded on the modified PDMS. This study demonstrated that COL/PDA coating can effectively enhance the surface biocompatibility of PDMS as verified by the enhanced adhesion and long-term proliferation of L929 fibroblasts and TSCs. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 408-418, 2018.
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Affiliation(s)
- Qian Li
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China.,Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, China
| | - Lihong Sun
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China.,Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, China
| | - Lei Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, China
| | - Zhigang Xu
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China.,Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, China
| | - Yuejun Kang
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China.,Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, China
| | - Peng Xue
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China.,Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, China
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