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Hu Q, Huang Z, Zhang H, Ma P, Feng R, Feng J. Coaxial electrospun Ag-NPs-loaded endograft membrane with long-term antibacterial function treating mycotic aortic aneurysm. Mater Today Bio 2024; 25:100940. [PMID: 38298561 PMCID: PMC10827516 DOI: 10.1016/j.mtbio.2023.100940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 08/01/2023] [Revised: 11/23/2023] [Accepted: 12/30/2023] [Indexed: 02/02/2024] Open
Abstract
The use of endovascular stent-graft has become an important option in the treatment of aortic pathologies. However, the currently used endograft membranes have limited ability to prevent bacterial colonization. This makes them unsuitable for the treatment of mycotic aneurysms, as the infection is prone to progress after endograft implantation. Moreover, even in non-mycotic aortic pathologies, endograft infections can occur in the short or long term, especially for patients with diabetes mellitus or in immune insufficiency conditions. So, this study aimed to develop a kind of Ag-NPs-loaded endograft membrane by coaxial electrospinning technique, and a series of physical and chemical properties and biological properties of the Ag-NPs-loaded membrane were characterized. Animal experiments conducted in pigs confirmed that the Ag-NPs-loaded membrane was basically non-toxic, exhibited good biocompatibility, and effectively prevented bacterial growth in a mycotic aortic aneurysm model. In conclusion, the Ag-NPs-loaded membrane exhibited good biocompatibility, good anti-infection function and slow-release of Ag-NPs for long-term bacteriostasis. Thus, the Ag-NPs-loaded membrane might hold potential for preventing infection progression and treating mycotic aortic aneurysms in an endovascular way.
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Affiliation(s)
- Qingxi Hu
- Rapid Manufacturing Engineering Center, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China
- Shanghai Key Laboratory of Intelligent Manufacturing and Robotics, Shanghai University, Shanghai, 200072, China
- National Demonstration Center for Experimental Engineering Training Education, Shanghai University, Shanghai, 200444, China
| | - Zhenwei Huang
- Rapid Manufacturing Engineering Center, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China
| | - Haiguang Zhang
- Rapid Manufacturing Engineering Center, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China
- Shanghai Key Laboratory of Intelligent Manufacturing and Robotics, Shanghai University, Shanghai, 200072, China
- National Demonstration Center for Experimental Engineering Training Education, Shanghai University, Shanghai, 200444, China
| | - Pengcheng Ma
- Department of Vascular Surgery, Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Rui Feng
- Shanghai General Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Jiaxuan Feng
- Vascular surgery department, Ruijin Hospital, affiliated to Medical school of Shanghai Jiaotong University, Shanghai, PR China
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2
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Ren F, Liu X, Wang J, Guo P, Wang S. Preparation and characterization of chemically modified tapioca starch-ionic liquid antibacterial films. Carbohydr Polym 2024; 324:121519. [PMID: 37985055 DOI: 10.1016/j.carbpol.2023.121519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 09/27/2023] [Accepted: 10/18/2023] [Indexed: 11/22/2023]
Abstract
The plasticizing and antibacterial effects of ionic liquids (ILs) in the preparation of tapioca starch-IL films were studied for the first time. 1-Ethyl-3-methylimidazolium acetate ([Emim][OAc]) caused complete disruption of starch crystallites during thermal compression, while some crystallites remained after the plasticization of starch with choline acetate ([Ch][OAc]). Compared to native tapioca starch (NTS), the plasticization of acetylated tapioca starch (ATS) and cross-linked tapioca (CTS) was slightly promoted and inhibited, respectively. Starch-[Emim][OAc] films exhibited higher hydrophobicity and mechanical properties but lower antibacterial activity than starch-[Ch][OAc] films. CTS-[Ch][OAc] films presented higher mechanical strength and antibacterial activity than NTS-[Ch][OAc] and ATS-[Ch][OAc] films. From this study, we conclude that ILs can be used in the preparation of antibacterial starch films to play the roles of plasticization and antibacterial activity. The antibacterial activity of starch films depends on types of ILs and their interactions with starch during film preparation.
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Affiliation(s)
- Fei Ren
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; School of Food Science and Technology, Tianjin University of Science & Technology, 300457, China
| | - Xingkai Liu
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; School of Food Science and Technology, Tianjin University of Science & Technology, 300457, China
| | - Jinwei Wang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; School of Food Science and Technology, Tianjin University of Science & Technology, 300457, China
| | - Peng Guo
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
| | - Shujun Wang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; School of Food Science and Technology, Tianjin University of Science & Technology, 300457, China; Food Laboratory of Zhongyuan, Tianjin University of Science & Technology, Tianjin 300457, China.
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3
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Wei Y, Wang R, Wang M, Hu L, Zhang X, Xu Y, Liu Y, Lan F, Chen J. Research status and prospects of organic photocatalysts in algal inhibition and sterilization: a review. Environ Sci Pollut Res Int 2024; 31:5013-5031. [PMID: 38147259 DOI: 10.1007/s11356-023-31665-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 12/18/2023] [Indexed: 12/27/2023]
Abstract
An increasing amount of sewage has been discharged into water bodies in the progression of industrialization and urbanization, causing serious water pollution. Meanwhile, the increase of nutrients in the water induces water eutrophication and rapid growth of algae. Photocatalysis is a common technique for algal inhibition and sterilization. To improve the utilization of visible light and the conversion efficiency of solar energy, more organic photocatalytic materials have been gradually developed. In addition to ultraviolet light, partial infrared light and visible light could also be used by organic photocatalysts compared with inorganic photocatalysts. Simultaneously, organic photocatalysts also exhibit favorable stability. Most organic photocatalysts can maintain a high degradation rate for algae and bacteria after several cycles. There are various organic semiconductors, mainly including small organic molecules, such as perylene diimide (PDI), porphyrin (TCPP), and new carbon materials (fullerene (C60), graphene (GO), and carbon nanotubes (CNT)), and large organic polymers, such as graphite phase carbon nitride (g-C3N4), polypyrrole (PPy), polythiophene (PTH), polyaniline (PANI), and polyimide (PI). In this review, the classification and synthesis methods of organic photocatalytic materials were elucidated. It was demonstrated that the full visible spectral response (400-750 nm) could be stimulated by modifying organic photocatalysts. Moreover, some problems were summarized based on the research status related to algae and bacteria, and corresponding suggestions were also provided for the development of organic photocatalytic materials.
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Affiliation(s)
- Yushan Wei
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Renjun Wang
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Mengjiao Wang
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Lijun Hu
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Xinyi Zhang
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Yuling Xu
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Yanyan Liu
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Feng Lan
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Junfeng Chen
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China.
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4
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Li J, Bao Y, Li Z, Cui H, Jiang Q, Hou C, Wang Y, Wu Y, Shang J, Xiao Y, Shu C, Wang Y, Wen B, Si X, Li B. Dual-function β-cyclodextrin/starch-based intelligent film with reversible responsiveness and sustained bacteriostat-releasing for food preservation and monitoring. Int J Biol Macromol 2023; 253:127168. [PMID: 37783251 DOI: 10.1016/j.ijbiomac.2023.127168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/22/2023] [Accepted: 09/28/2023] [Indexed: 10/04/2023]
Abstract
The full combination of high sensitivity indication and long-lasting bacteriostatic function is an innovative need to meet the practicality of intelligent film packaging systems for food products. Hence, Blueberry anthocyanins (BA) copigmentated by ferulic acid (FA) was used as an indicator, and cinnamon essential oil (CO) encapsulated by β-cyclodextrin (β-CD) as a bacteriostat, potato starch (PS) as a film-forming substrate to prepared a dual-function starch-based intelligent active packaging film with pH indicator and antibacterial function. FA had the best copigmentation effect with a threefold increase in a value compared to other phenolic acids. The ΔE value increased from 3.24 to 5.13 at pH 2-8, and the change was still prominent in acid-base alternating test, indicating a high response sensitivity. Notably, the yellow gamut of indicating terminus increased its visibility to the naked eye. The release behavior of CO from film was in line with Fick's diffusion. Meanwhile, the release of CO delayed to about 90 h through β-cyclodextrin encapsulation, showing a high growth-inhibition rate in E. coli and S. aureus of almost 100 %. In this study, a dual-function film with indication and bacteriostasis was prepared and enhanced with both, expanding its wide application in intelligent packaging of fresh food.
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Affiliation(s)
- Jiaxin Li
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Yiwen Bao
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Zhiying Li
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Huijun Cui
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Qiao Jiang
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Chengli Hou
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, PR China
| | - Yidi Wang
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Yunan Wu
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Junzhe Shang
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Yahua Xiao
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Chi Shu
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Yuehua Wang
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
| | - Bo Wen
- Yingkou Dongsheng Industry Co., Ltd., 88 Qinghua Street, Yingkou High-tech Industrial Development Zone, Yingkou, Liaoning 115000, China
| | - Xu Si
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China.
| | - Bin Li
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning 110866, China.
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Qiu X, Zhuang L, Yuan J, Wang H, Dong X, He S, Guan S, Chang Z, Bao P. Constructing multifunctional Cu Single-Atom nanozyme for synergistic nanocatalytic Therapy-Mediated Multidrug-Resistant bacteria infected wound healing. J Colloid Interface Sci 2023; 652:1712-1725. [PMID: 37672974 DOI: 10.1016/j.jcis.2023.08.192] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/19/2023] [Accepted: 08/30/2023] [Indexed: 09/08/2023]
Abstract
Developing an effective strategy to combat multi-drug-resistant (MDR) bacteria and promote wound healing without overuse of antibiotics remains an important and challenging goal. Herein, we established a synergistic reactive oxygen species (ROS) and reactive nitrogen species (RNS)-mediated nanocatalytic therapy, which was consisted of a multifunctional Cu single-atom nanozyme loaded with the l-arginine (l-Arg@Cu-SAzymes) and a low level of hydrogen peroxide (H2O2) as a trigger. l-Arg@Cu-SAzymes can possess excellent dual enzyme-like activities: catalase (CAT)-like activity that decompose H2O2 into O2, and subsequent oxidase (OXD)-like activity that convert O2 to cytotoxic superoxide anion radical (•O2-). Meanwhile, l-Arg@Cu-SAzymes can also be triggered by H2O2 to release nitric oxide (NO), which can continue to react with •O2- to generate more lethal peroxynitrite (ONOO-). Collectively, the synergistic ROS and RNS mediated by l-Arg@Cu-SAzymes endow the treatment system with an outstanding antibacterial ability against MDR bacteria and reduce the inflammation at the wound site. Furthermore, l-Arg@Cu-SAzymes-mediated NO and O2 release promote the cell proliferation, collagen synthesis, and the angiogenesis, as well as facilitate macrophage polarization to reparative M2 phenotype, thereby accelerating wound closure and tissue remodeling. Therefore, l-Arg@Cu-SAzymes-based synergistic nanocatalytic therapy can be regarded as a promising strategy for MDR bacterial infected wounds treatment, owing to their potent antibacterial efficacy and enhanced tissue remodeling effects.
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Affiliation(s)
- Xiaochen Qiu
- Senior Department of General Surgery, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Liang Zhuang
- School of Light Industry, Beijing Technology and Business University, 11 Fucheng Road, Haidian District, Beijing 100048, PR China
| | - Jian Yuan
- The 8th Medical Center, Chinese PLA General Hospital, Beijing 100091, China
| | - Huizhen Wang
- The 8th Medical Center, Chinese PLA General Hospital, Beijing 100091, China
| | - Xiaoyu Dong
- Senior Department of General Surgery, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Shan He
- School of Light Industry, Beijing Technology and Business University, 11 Fucheng Road, Haidian District, Beijing 100048, PR China.
| | - Shanyue Guan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Zhiyue Chang
- The 8th Medical Center, Chinese PLA General Hospital, Beijing 100091, China.
| | - Pengtao Bao
- The 8th Medical Center, Chinese PLA General Hospital, Beijing 100091, China.
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6
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Zhang M, Yang B, Yuan Z, Sheng Q, Jin C, Qi J, Yu M, Liu Y, Xiong G. Preparation and performance testing of corn starch/pullulan/gallic acid multicomponent composite films for active food packaging. Food Chem X 2023; 19:100782. [PMID: 37780268 PMCID: PMC10534094 DOI: 10.1016/j.fochx.2023.100782] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 04/07/2023] [Revised: 06/15/2023] [Accepted: 07/02/2023] [Indexed: 10/03/2023] Open
Abstract
The present study investigated the mechanical characteristics, hydrophobicity, antioxidant and antibacterial properties, FTIR, SEM and XRD of films fabricated with corn starch and pullulan (CS/PUL) by adding different concentrations of Gallic acid (GA) (0%, 0.5%, 1.0%, 1.5% w/v). The mechanical strength and opacity of CS/PUL films were enhanced by the addition of 1.0% GA. The water vapor permeability (WVP) of CS/PUL films was significantly lower in films with GA compared to those without (P < 0.05). The addition of GA, especially at concentrations of 1.0% and 1.5%, resulted in considerably better free radical scavenging activities on DPPH than films without GA (P < 0.05). Interestingly, the highest water contact angle (WCA) value was observed in films with 0.5% GA, indicating stronger hydrophobicity. Furthermore, the antibacterial capabilities of the films, particularly against E. coli and P. aeruginosa, improved with an increase in GA concentration. The results of FTIR, SEM and XRD analyses showed that GA was well distributed in the CS/PUL matrix.
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Affiliation(s)
| | | | - Zimeng Yuan
- Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Laboratory for Agriproducts Processing, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Qi Sheng
- Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Laboratory for Agriproducts Processing, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Changchun Jin
- Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Laboratory for Agriproducts Processing, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Jun Qi
- Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Laboratory for Agriproducts Processing, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Manman Yu
- Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Laboratory for Agriproducts Processing, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Yingnan Liu
- Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Laboratory for Agriproducts Processing, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Guoyuan Xiong
- Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Laboratory for Agriproducts Processing, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
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7
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Liu B, Zhu X, Feng C, Huang J, Yan D, Wang B. Bacteriostatic effect of Ag@TiO 2-Poly(p-dioxanone)-coated gauzes in vitro and in vivo on otitis media pathogens. Heliyon 2023; 9:e19375. [PMID: 37681170 PMCID: PMC10480629 DOI: 10.1016/j.heliyon.2023.e19375] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 03/22/2023] [Revised: 08/21/2023] [Accepted: 08/21/2023] [Indexed: 09/09/2023] Open
Abstract
The application of packing agents affects the final surgical outcomes in treating otitis media (OM) and introduces the risk of infection. To decrease the infectious risks of packing agents and even introduce positive bacteriostatic functions, a kind of PPDO-grafted Ag-incorporated TiO2 nanoparticles (Ag@TiO2-PPDO NP)-coated gauzes were prepared by a solution immersion method. Morphologies and in vitro Ag+ releasing of Ag@TiO2-PPDO NP coated gauzes were determined by scanning electron microscope (SEM) and inductively coupled plasma-mass spectrum (ICP-Ms). Ag@TiO2-PPDO NP could respond to visible light, which might make Ag@TiO2-PPDO NP inhibit the proliferation of bacteria continually and positively with irradiation of visible light. Then the bacteriostatic effects of these gauzes on OM pathogens were investigated in vitro and in vivo. These gauzes could inhibit the proliferation of pathogenic Staphylococcus aureus (S. aureus) and Streptococcus pneumoniae (S. pneumoniae) in vitro and rat subcutaneous infection models. Specifically, the bacteriostatic effect of these gauzes on S. aureus and S. pneumoniae could be enhanced with irradiation by visible light in vitro. Further, the rat external auditory canal infection model verified the enhanced bacteriostatic effect of Ag@TiO2-PPDO-coated gauzes on S. aureus with irradiation by visible light. The Ag@TiO2-PPDO-coated gauzes are promising for packing materials after OM surgery and could reduce postoperative antibiotic requirements.
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Affiliation(s)
- Biyao Liu
- Department of Otolaryngology Head and Neck Surgery, Affiliated Hospital of North Sichuan Medical College & School of Clinical Medicine, North Sichuan Medical College, China
| | - Xin Zhu
- Department of Otolaryngology Head and Neck Surgery, Affiliated Hospital of North Sichuan Medical College, China
| | - Chengmin Feng
- Department of Otolaryngology Head and Neck Surgery, Affiliated Hospital of North Sichuan Medical College, China
| | - Jing Huang
- Department of Otolaryngology Head and Neck Surgery, Affiliated Hospital of North Sichuan Medical College & School of Clinical Medicine, North Sichuan Medical College, China
| | - Dazhong Yan
- Department of Otolaryngology Head and Neck Surgery, Affiliated Hospital of North Sichuan Medical College, China
| | - Bing Wang
- Department of Chemistry, School of Pharmacy, North Sichuan Medical College, Nanchong, 637000, China
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Yu T, Wu D, Liang B, Wang J, Shang X, Wu Q. Preparation, characterization of Auricularia auricula polysaccharide-based films and application in meat preservation. Int J Biol Macromol 2023:125242. [PMID: 37301343 DOI: 10.1016/j.ijbiomac.2023.125242] [Citation(s) in RCA: 1] [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: 02/25/2023] [Revised: 05/23/2023] [Accepted: 06/05/2023] [Indexed: 06/12/2023]
Abstract
In order to find a degradable biofilm,edible films of Auricularia auricula polysaccharide (AAP) were prepared and characterized optically, morphologically, and mechanically in terms of barrier, bactericidal, and antioxidant properties and evaluated for their potential application in cold meat packaging. The results showed that films prepared from 40 % AAP had the best mechanical properties, with smooth and homogeneous surfaces, good water barrier properties and also good preservation of cold meat. Thus, Auricularia auricula polysaccharide is a composite membrane additive with great potential for application.
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Affiliation(s)
- Te Yu
- Changchun University, Nanguan District, Changchun, Jilin Province 130022, China
| | - Di Wu
- Changchun University, Nanguan District, Changchun, Jilin Province 130022, China
| | - Bin Liang
- Changchun University, Nanguan District, Changchun, Jilin Province 130022, China
| | - Jiaming Wang
- Changchun University, Nanguan District, Changchun, Jilin Province 130022, China
| | - Xinzhu Shang
- Changchun University, Nanguan District, Changchun, Jilin Province 130022, China
| | - Qiong Wu
- Changchun University, Nanguan District, Changchun, Jilin Province 130022, China.
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Wang J, Guo XL, Chen HY, Xiao LX, Yang GW, Yang HT. A novel l-rhamnose-binding lectin participates in defending against bacterial infection in zebrafish. Fish Shellfish Immunol 2023; 134:108553. [PMID: 36693487 DOI: 10.1016/j.fsi.2023.108553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/26/2022] [Accepted: 01/15/2023] [Indexed: 06/17/2023]
Abstract
l-rhamnose-binding lectin (RBL), which is a class of animal lectins independent of Ca2+, can specifically bind l-rhamnose or d-galactose. Although several lectins in zebrafish have been reported, their functional mechanisms have not been fully uncovered. In this study, we discovered a novel l-rhamnose binding lectin (DrRBL) and studied its innate immune function. The DrRBL protein contains only one carbohydrate-recognition domain (CRD), which includes two strictly conserved motifs, "YGR" and "DPC". DrRBL was detected in all tested tissues and was present at high levels in the spleen, hepatopancreas and skin. After Aeromonas hydrophila challenge, the DrRBL mRNA level was significantly upregulated. Additionally, DrRBL was secreted into the extracellular matrix. Recombinant DrRBL (rDrRBL) could significantly inhibit the growth of gram-positive/negative bacteria, bind to several bacteria and cause obvious agglutination. The rDrRBL protein could combine with polysaccharides, such as PGN and LPS, rather than LTA. A more detailed study showed that rDrRBL could combine with monosaccharides, such as mannose, rhamnose and glucose, which are important components of PGN and LPS. However, rDrRBL could not bind to ribitol, which is an important component of LTA. The DrRBL deletion mutants, DrRBLΔ144-150 and DrRBLΔ198-200, were also constructed. DrRBLΔ144-150 ("ANYGRTD" deficient) showed weak bacterial inhibiting ability. However, DrRBLΔ198-200 ("DPC" deficient) showed weak agglutination ability. These results suggest that the "DPC" domain is important for agglutination. The conserved domain "ANYGRTD" is essential for inhibiting bacterial growth.
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Affiliation(s)
- Jing Wang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, 250014, China
| | - Xin-Lu Guo
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, 250014, China
| | - Hong-Ye Chen
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, 250014, China
| | - Lin-Xi Xiao
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, 250014, China
| | - Gui-Wen Yang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, 250014, China
| | - Hui-Ting Yang
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, 250014, China.
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10
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Yang Y, Su S, Liu S, Liu W, Yang Q, Tian L, Tan Z, Fan L, Yu B, Wang J, Hu Y. Triple-functional bone adhesive with enhanced internal fixation, bacteriostasis and osteoinductive properties for open fracture repair. Bioact Mater 2023; 25:273-290. [PMID: 36825223 PMCID: PMC9941416 DOI: 10.1016/j.bioactmat.2023.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/02/2022] [Revised: 01/18/2023] [Accepted: 01/28/2023] [Indexed: 02/11/2023] Open
Abstract
At present, effective fixation and anti-infection implant materials represent the mainstay for the treatment of open fractures. However, external fixation can cause nail tract infections and is ineffective for fixing small fracture fragments. Moreover, closed reduction and internal fixation during the early stage of injury can lead to potential bone infection, conducive to bone nonunion and delayed healing. Herein, we designed a bone adhesive with anti-infection, osteogenic and bone adhesion fixation properties to promote reduction and fixation of open fractures and subsequent soft tissue repair. It was prepared by the reaction of gelatin (Gel) and oxidized starch (OS) with vancomycin (VAN)-loaded mesoporous bioactive glass nanoparticles (MBGNs) covalently cross-linked with Schiff bases. Characterization and adhesion experiments were conducted to validate the successful preparation of the Gel-OS/VAN@MBGNs (GOVM-gel) adhesive. Meanwhile, in vitro cell experiments demonstrated its good antibacterial effects with the ability to stimulate bone marrow mesenchymal stem cell (BMSCs) proliferation, upregulate the expression of alkaline phosphatase (ALP) and osteogenic proteins (RunX2 and OPN) and enhance the deposition of calcium nodules. Additionally, we established a rat skull fracture model and a subcutaneous infection model. The histological analysis showed that bone adhesive enhanced osteogenesis, and in vivo experiments demonstrated that the number of inflammatory cells and bacteria was significantly reduced. Overall, the adhesive could promote early reduction of fractures and antibacterial and osteogenic effects, providing the foothold for treatment of this patient population.
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Affiliation(s)
- Yusheng Yang
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Shenghui Su
- Department of Orthopaedics, Ningde Municipal Hospital, Ningde Normal University, Ningde, Fujian Province, 352100, China
| | - Shencai Liu
- Division of Orthopaedics Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Weilu Liu
- Division of Orthopaedics Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Qinfeng Yang
- Division of Orthopaedics Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Liangjie Tian
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Zilin Tan
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Lei Fan
- Division of Orthopaedics Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China
| | - Bin Yu
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China,Corresponding author.
| | - Jian Wang
- Division of Orthopaedics Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China,Corresponding author.
| | - Yanjun Hu
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, 510515, China,Corresponding author.
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11
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Wang Q, Peng Y, Chai L, Ding W. Antimicrobial effect of sorbic acid-loaded chitosan/tripolyphosphate nanoparticles on Pseudomonas aeruginosa. Int J Biol Macromol 2023; 226:1031-1040. [PMID: 36455825 DOI: 10.1016/j.ijbiomac.2022.11.220] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 08/24/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 11/29/2022]
Abstract
Sorbic acid-loaded chitosan/tripolyphosphate nanoparticles (SANs) have previously been shown to exert both antibacterial and antioxidant effects on Chinese sausage. In this study, the minimum inhibitory concentrations (MICs) of SANs against two Pseudomonas aeruginosa strains were determined. The blank control group (BC) served as the negative control, while the chitosan/tripolyphosphate nanoparticles (CTNs) group and free sorbic acid (SA) group served as the positive controls. Tests conducted under five different pH conditions (5/6/7/8/9) revealed that the SANs exhibited a good bacteriostatic effect against P. aeruginosa. Variations in the metabolism, cell membrane or cell wall integrity, and morphology of P. aeruginosa were measured to evaluate the effects of SANs on their intracellular and extracellular components. The MIC of SANs for the two P. aeruginosa strains was determined to be 150 μg/mL. SANs delayed the growth of P. aeruginosa and severely damaged both its inner and outer cell membranes. The heteromorphism of the bacteria as observed by field emission scanning electron microscopy (FESEM), verified the aforementioned results. The results showed SANs could effectively inhibit the growth of P. aeruginosa and exert antibacterial ability in a wider range of acid-base environments. This study broadens the application of SANs in food processing and provides experimental basis.
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Affiliation(s)
- Qian Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Yue Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Lina Chai
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Wu Ding
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
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12
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Xun X, Qiu J, Zhang J, Wang H, Han F, Xu X, Yuan R. Triple-functional injectable liposome-hydrogel composite enhances bacteriostasis and osteo/angio-genesis for advanced maxillary sinus floor augmentation. Colloids Surf B Biointerfaces 2022; 217:112706. [PMID: 35870422 DOI: 10.1016/j.colsurfb.2022.112706] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 04/07/2022] [Revised: 06/17/2022] [Accepted: 07/13/2022] [Indexed: 11/16/2022]
Abstract
Bone-grafting biological materials are commonly used to increase the height of the alveolar bone in the maxillary posterior region during maxillary sinus floor augmentation. However, there has been little research on the development of an injectable bone-grafting material with bacteriostatic, angiogenic, and osteogenic properties. In this work, we developed a triple-functional vancomycin/deferoxamine/dexamethasone (Van/DFO/Dex) liposome-hydrogel composite with desirable injectability. The release kinetics confirmed orderly sustained release of Van (a bacteriostat), DFO (a vascularised small molecule), and Dex (an osteogenic small molecule). In vitro findings demonstrated the favourable cytocompatibility and antibacterial ability of this composite against Staphylococcus aureus. Additionally, the angiogenic ability of human umbilical vein endothelial cells and osteogenic differentiation activity of MC3T3-E1 cells were enhanced. An in vivo bacteriostasis assay and rabbit maxillary sinus floor augmentation model corroborated the enhanced bacteriostasis and vascularised bone regeneration properties of this functionalised composite. Overall, the favourable injectability to be fit for the minimally invasive procedure, locally sustained release property, and prominent biological functions underscore the clinical potential of Van/DFO/Dex as an ideal bone-grafting material for irregular bone defect repairs, such as maxillary sinus floor augmentation.
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Affiliation(s)
- Xingxiang Xun
- School of Stomatology of Qingdao University, Qingdao 266003, PR China
| | - Jianzhong Qiu
- Center of Oral Medicine, Qingdao Municipal Hospital Affiliated to Qingdao University, #5 Donghai Middle Road, Qingdao 266000, PR China
| | - Jing Zhang
- Department of Operation, Qingdao Municipal Hospital Affiliated to Qingdao University, #5 Donghai Middle Road, Qingdao 266000, PR China
| | - Hejing Wang
- School of Stomatology of Qingdao University, Qingdao 266003, PR China
| | - Feng Han
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, PR China
| | - Xiao Xu
- Center of Oral Medicine, Qingdao Municipal Hospital Affiliated to Qingdao University, #5 Donghai Middle Road, Qingdao 266000, PR China.
| | - Rongtao Yuan
- School of Stomatology of Qingdao University, Qingdao 266003, PR China; Center of Oral Medicine, Qingdao Municipal Hospital Affiliated to Qingdao University, #5 Donghai Middle Road, Qingdao 266000, PR China.
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13
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Morohoshi K, Yamazaki T, Kito K, Sato B, Kang W, Hibino T, Yoshida M, Yoshida K, Iwamoto T, Yamada M, Miyado K, Kawano N. Identification of an antibacterial polypeptide in mouse seminal vesicle secretions. J Reprod Immunol 2021; 148:103436. [PMID: 34700103 DOI: 10.1016/j.jri.2021.103436] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 07/30/2021] [Revised: 10/05/2021] [Accepted: 10/13/2021] [Indexed: 11/16/2022]
Abstract
In both men and women, pathogenic bacteria enter the reproductive tract and cause harmful symptoms. Intrauterine and oviductal inflammation after copulation may have severe effects, such as infertility, implantation failure, oviduct obstruction, and robust life-threatening bacterial infection. Human seminal plasma is considered to be protective against bacterial infection. Among its components, Semenogelin-I/-II proteins are digested to function as bactericidal factors; however, their sequences are not conserved in mammals. Therefore, alternative antibacterial (bactericidal and/or bacteriostatic) systems may exist across mammals. In this study, we examined the antibacterial activity in the seminal plasma of mice lacking a gene cluster encoding Semenogelin-I/-II counterparts. Even in the absence of the majority of seminal proteins, antibacterial activity remained in the seminal plasma. Moreover, a combination of gel chromatography and liquid chromatography coupled with tandem mass spectrometry revealed that the prostate and testis expressed 4 protein as a novel antibacterial (specifically, bacteriostatic) protein, the sequence of which is broadly conserved across mammals. Our results provide the first evidence of a bacteriostatic protein that is widely present in the mammalian seminal plasma.
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Affiliation(s)
- Kazunori Morohoshi
- Laboratory of Regulatory Biology, Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama, Kawasaki, Kanagawa, 214-8571, Japan
| | - Takeo Yamazaki
- Laboratory of Regulatory Biology, Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama, Kawasaki, Kanagawa, 214-8571, Japan
| | - Keiji Kito
- Laboratory of Proteomics, Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama, Kawasaki, Kanagawa, 214-8571, Japan
| | - Ban Sato
- Laboratory of Regulatory Biology, Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama, Kawasaki, Kanagawa, 214-8571, Japan
| | - Woojin Kang
- Department of Reproductive Biology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya, Tokyo, 157-8535, Japan
| | - Taku Hibino
- Faculty of Education, Saitama University, 255 Shimo-Okubo, Sakura, Saitama City, Saitama, 338-8570, Japan
| | - Manabu Yoshida
- Misaki Marine Biological Station, School of Science, the University of Tokyo, 1024 Koajiro, Misaki, Miura, Kanagawa, 238-0225, Japan
| | - Kaoru Yoshida
- Faculty of Biomedical Engineering, Toin University of Yokohama, 1614 Kurogane, Aoba, Yokohama, Kanagawa, 225-8503, Japan
| | - Teruaki Iwamoto
- Division of Male Infertility, Center for Human Reproduction, Sanno Hospital, International University of Health and Welfare, 8-10-21 Akasaka, Minato, Tokyo, 107-0052, Japan
| | - Mitsutoshi Yamada
- Department of Obstetrics and Gynecology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku, Tokyo, 160-8582, Japan
| | - Kenji Miyado
- Department of Reproductive Biology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya, Tokyo, 157-8535, Japan
| | - Natsuko Kawano
- Laboratory of Regulatory Biology, Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama, Kawasaki, Kanagawa, 214-8571, Japan.
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14
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Li X, Yang X, Wang Z, Liu Y, Guo J, Zhu Y, Shao J, Li J, Wang L, Wang K. Antibacterial, antioxidant and biocompatible nanosized quercetin-PVA xerogel films for wound dressing. Colloids Surf B Biointerfaces 2021; 209:112175. [PMID: 34740095 DOI: 10.1016/j.colsurfb.2021.112175] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/16/2021] [Accepted: 10/19/2021] [Indexed: 01/09/2023]
Abstract
Topical use of antimicrobial agents to treat wounds to inhibit bacterial invasion and facilitate wound healing is an effective strategy. In this work, an antibacterial xerogel film for potential applications in wound dressings was developed. First, a natural antibacterial agent, quercetin (Qu), was made into water-soluble quercetin-borate (QuB) nanoparticles by merging a solvent exchange method with the borate esterification reaction. QuB nanoparticles were then employed as the cross-linking agent to achieve gelation of poly(vinyl alcohol) (PVA) to obtain antimicrobial QuB-PVA composite microgels. Furthermore, QuB-PVA microgels were utilized as raw materials to produce xerogel films via an electrospray technique. The as-prepared QuB-PVA xerogel films exhibited excellent bacteriostasis, antioxidation, biocompatibility, self-healing, accelerated skin regeneration and functional restoration, and promoted skin wound healing. The QuB-PVA films significantly facilitated the in vivo healing speed of full-thickness skin wounds compared to commercial dressings. We believe that the present multifunctional QuB-PVA xerogel film is an excellent candidate for the wound dressings.
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Affiliation(s)
- Xiaozhou Li
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xuxuan Yang
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zicheng Wang
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yanxiang Liu
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jiaxiang Guo
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yu Zhu
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jiaxing Shao
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jiage Li
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Lin Wang
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Ke Wang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China.
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15
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载药脂质体修饰的聚醚醚酮植入物的抑菌和骨整合性能. Beijing Da Xue Xue Bao Yi Xue Ban 2021; 53. [PMID: 34393241 DOI: 10.19723/j.issn.1671-167X.2021.04.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
OBJECTIVE To develop dexamethasone plus minocycline-loaded liposomes (Dex/Mino liposomes) and apply them to improve bioinert polyetheretherketone (PEEK) surface, which could prevent post-operative bacterial contamination, enhance ossification for physiologic osseointegration, and finally reduce implant failure rates. METHODS Dex/Mino liposomes were covalently grafted onto the PEEK surface using polydopamine (pDA) coating as a medium. Confocal laser scanning microscopy was used to confirm the binding of fluorescently labeled liposomes onto the PEEK substrate, and a microplate reader was used to semiquantitatively measure the average fluorescence intensity of fluorescently labeled liposome-decorated PEEK surfaces. Moreover, the mouse subcutaneous infection model and the beagle femur implantation model were respectively conducted to verify the bioactivity of Dex/Mino liposome-modified PEEK in vivo, by means of micro computed tomography (micro-CT) and hematoxylin and eosin (HE) staining analysis. RESULTS The qualitative and quantitative results of fluorescently labeled liposomes showed that, the red fluorescence intensity of the PEEK-pDA-lipo group was stronger than that of the PEEK-NF-lipo group (P < 0.05); the liposomes were successfully and uniformly decorated on the PEEK surfaces due to the pDA coating. After mouse subcutaneous implantation of PEEKs for 24 hours, HE staining results showed that the number of inflammatory cells in the PEEK-Dex/Mino lipo group were lower than that in the inert PEEK group (P < 0.05), indicating a lower degree of infection in the test group. These results suggested that the Mino released from the liposome-functionalized surface provided an effective bacteriostasis in vivo. After beagle femoral implantation of PEEK for 8 weeks, micro-CT results showed that the PEEK-Dex/Mino lipo group newly formed more continuous bone when compared with the inert PEEK group; HE staining results showed that more new bones were formed in the PEEK-Dex/Mino lipo group than in the inert PEEK group, which were firmly bonded to the functionalized PEEK surface and extended along the PEEK interface. These results suggested that the Dex released from the liposome-functionalized surface induced effective bone regeneration in vivo. CONCLUSION Dex/Mino liposome modification enhanced the bioactivity of inert PEEK, the functionalized PEEK with enhanced antibacterial and osseointegrative capacity has great potential as an orthopedic/dental implant material for clinical application.
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16
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Wang FY, Ren Y, Lan RT, Fu WQ, Chen ZJ, Huang S, Gul RM, Wang J, Xu JZ, Li ZM. Controlled bacteriostasis of tea polyphenol loaded ultrahigh molecular weight polyethylene with high crosslink density and oxidation resistance for total joint replacement. Mater Sci Eng C Mater Biol Appl 2021; 124:112040. [PMID: 33947540 DOI: 10.1016/j.msec.2021.112040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 03/01/2021] [Accepted: 03/22/2021] [Indexed: 02/07/2023]
Abstract
To avoid catastrophic bacterial infection in prosthesis failure, ultrahigh molecular weight polyethylene (UHMWPE), a common bearing material of artificial joints, has been formulated with antibiotics to eliminate bacteria locally at the implant site. However, the pressing issues regarding cytotoxic effects and evolution of drug resistant bacteria necessitates the development of bio-friendly bacteriostat with long bacteriostatic efficacy. Herein, tea polyphenol extracted from nature source was introduced in UHMWPE as a biogenic antimicrobial. Controlled antimicrobial activity was achieved by chemical crosslinking to regulate the release of the tea polyphenol. In addition, the crosslinking efficiency of UHMWPE blends with high loaded tea polyphenol was significantly improved in comparison to radiation crosslinking. The immobilized tea polyphenols also enhanced the oxidation stability of the UHMWPE, which is essential to prolong the service life in vivo and the storage time in vitro. The blends presented good biocompatibility, despite cell repellent on the highly crosslinked surface. Chemically crosslinked tea polyphenol/UHMWPE exhibited feasible properties for total joint implants, which is promising for clinical application.
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17
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Liu K, Wang G, Guo S, Liu J, Qu W, Liu N, Wang H, Ji J, Chu PK, Gu B, Zhang W. High-Potential surface on zirconia ceramics for bacteriostasis and biocompatibility. Colloids Surf B Biointerfaces 2020; 193:111074. [PMID: 32416519 DOI: 10.1016/j.colsurfb.2020.111074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 01/31/2020] [Revised: 03/25/2020] [Accepted: 04/20/2020] [Indexed: 10/24/2022]
Abstract
Bacteria easily adhere, colonize, and form biofilm on oral implants subsequently causing periimplantation periarthritis and mechanical loosening. Previous studies show that a high potential surface on polymeric implants can achieve surface bacteriostasis without side effects. In this study, a high surface potential is introduced to zirconia ceramics to mitigate bacterial infection. Carbon and nitrogen plasma immersion ion implantation (C-PIII and N-PIII) are conducted on zirconia ceramic samples sequentially to elevate the surface potential. The surface with a high potential but without ion leaching exhibits excellent antibacterial effects against oral bacteria and little bacterial resistance is triggered. The surface also has high strength and excellent biocompatibility. The nitrogen-containing inorganic structure with high potential can actualize bacteriostasis and biocompatibility on zirconia ceramics simultaneously and this new strategy can enhance the antibacterial ability of oral implants.
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Affiliation(s)
- Ke Liu
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guomin Wang
- Department of Physics & Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Shuqin Guo
- Stomatology Department of the First Medical Center of the General Hospital of Chinese PLA, 28 FuXing Road, Beijing 100853, China
| | - Jun Liu
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei Qu
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Na Liu
- Stomatology Department of the First Medical Center of the General Hospital of Chinese PLA, 28 FuXing Road, Beijing 100853, China
| | - Huaiyu Wang
- Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, Guangdong, China
| | - Junhui Ji
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Paul K Chu
- Department of Physics & Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Bin Gu
- Stomatology Department of the First Medical Center of the General Hospital of Chinese PLA, 28 FuXing Road, Beijing 100853, China.
| | - Wei Zhang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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18
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Abstract
Rutin possesses a wide range of application prospects with various bioactivities. However, its bitter and water-insoluble properties restrict its application in the field of functional foods. A new complex of rutin and chitooligosaccharide (Rutin-COS) was prepared via spray-drying method (100 °C, 1 L/h) and freeze-drying method (-80 °C, 24 h), respectively. The water solubility, bitterness, antioxidant and antibacterial activities of Rutin-COS were evaluated, and the complexation of Rutin-COS was characterized by SEM, 1H-NMR and ROESY. Compared to freeze-drying method, spray-drying method was more effective for preparing stable Rutin-COS complex. The spray-dried Rutin-COS showed increased water solubility, weakened bitterness, enhanced antioxidant and antibacterial activity compared to rutin. The Rutin-COS complex was demonstrated to be formed through hydrogen bonds between the A, B rings of rutin and COS.
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Affiliation(s)
- Ruge Cao
- State Key Laboratory of Food Nutrition and Safety, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China
| | - Qiuchen Ma
- State Key Laboratory of Food Nutrition and Safety, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China
| | - Yu Fu
- State Key Laboratory of Food Nutrition and Safety, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China
| | - Zhongkai Zhou
- State Key Laboratory of Food Nutrition and Safety, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, No. 29, 13th Avenue, TEDA, Tianjin, 300457, China.
- ARC Industrial Transformation Training Centre for Functional Grains, Charles Sturt University, Wagga Wagga, NSW, 2678, Australia.
| | - Xiaoyu Zhao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, 300457, China
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19
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Shi B, Wang T, Zeng Z, Zhou L, You W, Ke C. The role of copper and zinc accumulation in defense against bacterial pathogen in the fujian oyster (Crassostrea angulata). Fish Shellfish Immunol 2019; 92:72-82. [PMID: 31129186 DOI: 10.1016/j.fsi.2019.05.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 05/22/2019] [Accepted: 05/22/2019] [Indexed: 06/09/2023]
Abstract
Cu and Zn are hyper-accumulated in oysters, and the accumulation of these metals increases host resistance to pathogens. However, the role of Cu/Zn in oyster immune defense remains unclear. In this study, Crassostrea angulata with different levels of Cu and Zn were obtained through metal exposure or selective breeding. Both in vivo and in vitro experiments showed that oysters accumulating more Cu/Zn exhibited stronger antibacterial abilities. Vibrio harveyi infection significantly promoted the metal redistribution in oysters: Cu and Zn concentrations decreased in the mantle, but increased in the plasma and hemocytes. This redistribution was accompanied by changes in the expression levels of Cu and Zn transporter genes (CTR1, ATP7A, ZIP1, and ZNT2), suggesting that the Cu/Zn burst observed in the hemocytes was likely due to the transfer of heavy metals from plasma (mediated by the metal importer proteins) or released from intracellular stores. The degree to which Cu/Zn concentration increased in the plasma and hemocytes was more dramatic in oysters with high levels of Cu/Zn accumulation. In vitro, Cu and Zn both inhibited the growth of V. harveyi, while Cu plus H2O2 was lethal to the bacteria. The strength of the growth-inhibition and lethal effects depended on the metal dose. In addition to these effects, increases in Cu concentration increased the activity levels of PO in the oyster plasma and hemocytes in vivo and in vitro. However, SOD activity was not affected by Cu or Zn accumulation. Thus, our results suggested that the Cu/Zn burst in the hemolymph was an important factor in the oyster immune reaction, creating a toxic internal environment for the pathogen, as well as catalyzing inorganic or enzymatic reactions to strengthen bacteriostasis. By determining the extent of Cu/Zn burst in the immune response, Cu/Zn accumulated levels could affect the resistance of oysters to pathogens.
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Affiliation(s)
- Bo Shi
- State Key Laboratory of Marine Environmental Science, College of the Environment & Ecology, Xiamen University, Xiamen, 361102, PR China
| | - Tian Wang
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, PR China
| | - Zhen Zeng
- Xiamen Key Laboratory of Marine Medicinal Natural Products Resources, Xiamen Medical College, Xiamen, 361023, China
| | - Long Zhou
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, PR China
| | - Weiwei You
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, PR China.
| | - Caihuan Ke
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, PR China.
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20
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Xu X, Li Y, Wang L, Li Y, Pan J, Fu X, Luo Z, Sui Y, Zhang S, Wang L, Ni Y, Zhang L, Wei S. Triple-functional polyetheretherketone surface with enhanced bacteriostasis and anti-inflammatory and osseointegrative properties for implant application. Biomaterials 2019; 212:98-114. [PMID: 31112825 DOI: 10.1016/j.biomaterials.2019.05.014] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [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: 12/06/2018] [Revised: 05/08/2019] [Accepted: 05/08/2019] [Indexed: 12/14/2022]
Abstract
Polyetheretherketone (PEEK) is considered a potential orthopedic/dental material because of its excellent mechanical and chemical properties (e.g., similar elastic modulus to that of human bone). However, the poor bacteriostasis and anti-inflammatory and osseointegrative properties of bioinert PEEK impede its clinical application. We previously developed a facile and versatile surface modification method using dexamethasone plus minocycline-loaded liposomes (Dex/Mino liposomes) bonded by a mussel-inspired polydopamine coating, which effectively modulated cell inflammatory response and discouraged bacterial colonization in vitro. Herein, we report the application of this multifunctional surface modification method to improve bioinert PEEK, aimed at further studying the in vitro osteogenesis and in vivo properties of Dex/Mino liposome-modified PEEK to prevent bacterial contamination, attenuate the inflammatory response, and enhance ossification for physiologic osseointegration. Our study established that the Dex/Mino liposome-modified PEEK surface presented favorable stability and cytocompatibility. Compared with bare PEEK, improved osteogenic differentiation of human mesenchymal stem cells under both osteoinductive and osteoconductive conditions was found on the functionalized surface due to the liposomal Dex releasing. In vivo bacteriostasis assay confirmed that Mino released from the functionalized surface provided an effective antibacterial effect. Moreover, the subcutaneous foreign body reaction and beagle femur implantation models corroborated the enhanced anti-inflammatory and osteointegrative properties of the functionalized PEEK. Our findings indicate that the developed Dex/Mino liposome-modified PEEK with enhanced antibacterial, anti-inflammatory, and osseointegrative capacity has great potential as an orthopedic/dental implant material for clinical application.
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Affiliation(s)
- Xiao Xu
- Department of Oral and Maxillofacial Surgery/Central Laboratory, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing 100081, PR China
| | - Yongliang Li
- Second Dental Center, School and Hospital of Stomatology, Peking University, Beijing 100081, PR China
| | - Lixin Wang
- Department of Stomatology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, PR China
| | - Yan Li
- Laboratory of Biomaterials and Regenerative Medicine, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, PR China
| | - Jijia Pan
- Laboratory of Biomaterials and Regenerative Medicine, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, PR China
| | - Xiaoming Fu
- Department of Oral and Maxillofacial Surgery/Central Laboratory, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing 100081, PR China
| | - Zuyuan Luo
- Laboratory of Biomaterials and Regenerative Medicine, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, PR China
| | - Yi Sui
- Department of Oral and Maxillofacial Surgery/Central Laboratory, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing 100081, PR China
| | - Siqi Zhang
- Laboratory of Biomaterials and Regenerative Medicine, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, PR China
| | - Liang Wang
- Department of Oral and Maxillofacial Surgery/Central Laboratory, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing 100081, PR China
| | - Yaofeng Ni
- Department of Stomatology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, PR China
| | - Lei Zhang
- Department of Oral and Maxillofacial Surgery/Central Laboratory, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing 100081, PR China.
| | - Shicheng Wei
- Department of Oral and Maxillofacial Surgery/Central Laboratory, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing 100081, PR China; Laboratory of Biomaterials and Regenerative Medicine, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, PR China.
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Li R, Weng J, Wang X, Meng Q, Wang Y, Sun J. Bursicon homodimers induce innate immune by activating the expression of anti-microbial peptide genes in the shrimp Neocaridina heteropoda. Fish Shellfish Immunol 2019; 84:906-911. [PMID: 30385246 DOI: 10.1016/j.fsi.2018.10.080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/24/2018] [Accepted: 10/28/2018] [Indexed: 06/08/2023]
Abstract
Bursicon is a neurohormone belonging to the cystine knot protein family. It consists of two subunits (burs α and burs β) and plays a pivotal role in cuticle tanning and wing expansion in insects. Recent studies show that homologous crustacean bursicon stimulates cuticle thickening and granulation of hemocytes in the crab Callinectes sapidus. Here we investigate whether bursicon homodimers function in immunoprotective defense systems of shrimp. We found that abdominal ganglion was the main neurohemal release site of bursicon in Neocaridina heteropoda. Bacterial infections induced overexpression of burs α (bursicon α) and burs β (bursicon β). RNAi of burs α, burs β or both inhibited the expression of anti-microbial peptide (AMP) genes. Treating shrimp adults with r-bursicon (recombinant bursicon) homodimers led to up-regulation of three AMP genes. Besides, through the induced AMPs, r-bursicon homodimers enhanced the bacteriostasis of shrimp in vivo and in vitro. These findings demonstrate a novel function of bursicon in crustacean that it induces innate immune via up-regulating the expression of genes encoding AMPs.
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Affiliation(s)
- Ran Li
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Tianjin, 300387, People's Republic of China
| | - Jieyang Weng
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Tianjin, 300387, People's Republic of China
| | - Xin Wang
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Tianjin, 300387, People's Republic of China
| | - Qinghao Meng
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Tianjin, 300387, People's Republic of China
| | - Yongyong Wang
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Tianjin, 300387, People's Republic of China
| | - Jinsheng Sun
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Science, Tianjin Normal University, Tianjin, 300387, People's Republic of China.
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Wang S, Yao J, Zhou B, Yang J, Chaudry MT, Wang M, Xiao F, Li Y, Yin W. Bacteriostatic Effect of Quercetin as an Antibiotic Alternative In Vivo and Its Antibacterial Mechanism In Vitro. J Food Prot 2018; 81:68-78. [PMID: 29271686 DOI: 10.4315/0362-028x.jfp-17-214] [Citation(s) in RCA: 179] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Quercetin, a ubiquitous flavonoid, is known to have antibacterial effects. The purpose of this study was to investigate the effect of quercetin on cecal microbiota of Arbor Acre (AA) broiler chickens in vivo and the bacteriostatic effect and antibacterial mechanism of quercetin in vitro. In vivo, 480 AA broilers (1 day old) were randomly allotted to four treatments (negative control and 0.2, 0.4, or 0.6 g of quercetin per kg of diet) for 42 days. Cecal microbial population and distribution were measured at the end of the experiment. The cecal microflora in these broilers included Proteobacteria, Fimicutes, Bacteroidetes, and Deferribacteres. Compared with the negative control, quercetin significantly decreased the copies of Pseudomonas aeruginosa ( P < 0.05), Salmonella enterica serotype Typhimurium ( P < 0.01), Staphylococcus aureus ( P < 0.01), and Escherichia coli ( P < 0.01) but significantly increased the copies of Lactobacillus ( P < 0.01), Bifidobacterium ( P < 0.01), and total bacteria ( P < 0.01). In vitro, we investigated the bacteriostatic effect of quercetin on four kinds of bacteria ( E. coli, P. aeruginosa, S. enterica Typhimurium, and S. aureus) and the antibacterial mechanism of quercetin in E. coli and S. aureus. The bacteriostatic effect of quercetin was stronger on gram-positive bacteria than on gram-negative bacteria. Quercetin damaged the cell walls and membranes of E. coli (at 50 × MIC) and S. aureus (at 10 × MIC). Compared with the control, the activity of the extracellular alkaline phosphatase and β-galactosidase and concentrations of soluble protein in E. coli and S. aureus were significantly increased (all P < 0.01), and the activity of ATP in S. aureus was significantly increased ( P < 0.01); however, no significant change in ATP activity in E. coli was observed ( P > 0.05). These results suggest that quercetin has potential as an alternative antibiotic feed additive in animal production.
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Affiliation(s)
- Shengan Wang
- 1 Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang Province 150030, People's Republic of China
| | - Jiaying Yao
- 1 Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang Province 150030, People's Republic of China
| | - Bo Zhou
- 1 Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang Province 150030, People's Republic of China
| | - Jiaxin Yang
- 1 Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang Province 150030, People's Republic of China
| | - Maria T Chaudry
- 1 Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang Province 150030, People's Republic of China
| | - Mi Wang
- 1 Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang Province 150030, People's Republic of China
| | - Fenglin Xiao
- 1 Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang Province 150030, People's Republic of China
| | - Yao Li
- 1 Institute of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang Province 150030, People's Republic of China
| | - Wenzhe Yin
- 2 Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang Province 150086, People's Republic of China
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Xin L, Zhang H, Zhang R, Li H, Wang W, Wang L, Wang H, Qiu L, Song L. CgIL17-5, an ancient inflammatory cytokine in Crassostrea gigas exhibiting the heterogeneity functions compared with vertebrate interleukin17 molecules. Dev Comp Immunol 2015; 53:339-348. [PMID: 26257382 DOI: 10.1016/j.dci.2015.08.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/04/2015] [Accepted: 08/04/2015] [Indexed: 06/04/2023]
Abstract
Interleukin 17 (IL17) is a proinflammatory cytokine that plays an important role in immune response. Recently, five novel IL17 homologs have been identified by screening and analyzing the genome of pacific oyster Crassostrea gigas. In the present study, the functions of CgIL17-5 were investigated by examining the distribution of its mRNA and protein, ligands binding and modulation in immune response. The mRNA expression levels of CgIL17-5 in hemocytes of oysters post twice challenges of Vibrio splendidus were all significantly up-regulated (P < 0.01), while the secondary pathogen infection attenuated the expression level of CgIL17-5 mRNA compared with the primary challenge. CgIL17-5 was found to be located on oyster hemocyte membranes through fluorescence confocal assay. The luciferase reporter assays showed that CgIL17-5 could activate the transfactors NF-κB, CREB and ATF-1, and involve in their signal pathways in HEK293T cells. Meanwhile, CgIL17-5 could augment the IL6 synthesis in HuVEC cells, playing the similar roles as human IL17 in inflammatory response. Additionally, the recombinant CgIL17-5 (rCgIL17-5) could directly bind peptidoglycan (PGN), lipopolysaccharide (LPS), poly (I:C) and β-1,3-glucan, with the highest affinity to PGN, and significantly inhibit the growth of Micrococcus luteus and Escherichia coli. All the results collectively suggested that CgIL17-5, as an ancient inflammatory cytokine, could not only activate signal transduction for the release of other cytokines, but also mediate the clearance of extracellular bacteria in oysters.
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Affiliation(s)
- Lusheng Xin
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huan Zhang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Ran Zhang
- Ningbo University, Ningbo 315211, China
| | - Hui Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weilin Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lingling Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Hao Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Limei Qiu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Linsheng Song
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China.
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Abstract
Toxin-antitoxin systems are ubiquitous in nature and present on the chromosomes of both bacteria and archaea. MazEF is a type II toxin-antitoxin system present on the chromosome of Escherichia coli and other bacteria. Whether MazEF is involved in programmed cell death or reversible growth inhibition and bacterial persistence is a matter of debate. In the present work the role of MazF in bacterial physiology was studied by using an inactive, active-site mutant of MazF, E24A, to activate WT MazF expression from its own promoter. The ectopic expression of E24A MazF in a strain containing WT mazEF resulted in reversible growth arrest. Normal growth resumed on inhibiting the expression of E24A MazF. MazF-mediated growth arrest resulted in an increase in survival of bacterial cells during antibiotic stress. This was studied by activation of mazEF either by overexpression of an inactive, active-site mutant or pre-exposure to a sublethal dose of antibiotic. The MazF-mediated persistence phenotype was found to be independent of RecA and dependent on the presence of the ClpP and Lon proteases. This study confirms the role of MazEF in reversible growth inhibition and persistence.
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Affiliation(s)
- Arti Tripathi
- From the Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India and
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Wu MH, Huang YQ, Huang ZS, Zhou XH, Yu WQ, Su JW. In vitro bacteriostatic effect of berberine, emodin, schisandra, and baicalin on multidrug resistant strains of Helicobacter pylori. Shijie Huaren Xiaohua Zazhi 2013; 21:3247-3251. [DOI: 10.11569/wcjd.v21.i30.3247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To examine the in vitro bacteriostatic effect of berberine, emodin, schisandra, and baicalin on multiple drug resistant (MDR) strains of Helicobacter pylori (H. pylori) to provide an experimental basis for clinical killing of these MDR strains.
METHODS: After culturing and isolating forty-six H. pylori strains, the minimum inhibitory concentrations (MICs) of amoxicillin, clarithromycin, levofloxacin, tetracycline and metronidazole for the isolated strains were determined by agar dilution method to screen MDR strains. The MICs of berberine, emodin, schisandra, and baicalin for MDR strains were then determined.
RESULTS: Six MDR strains were identified. The MICs of berberine, emodin, schisandra, and baicalin for different MDR strains were not identical, and their ranges were: berberine 12.5 mg/mL, emodin 50-200 mg/mL, baicalin 25-200 mg/mL, and schisandra 50-100 mg/mL.
CONCLUSION: Each of berberine, emodin, schisandra, and baicalin has an appreciated inhibitory effect on MDR strains in vitro, and the effect of berberine is more significant.
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Huang Z, Ren J. Antibacterial Activity of Elephant Garlic and Its Effect against U2OS Human Osteosarcoma Cells. Iran J Basic Med Sci 2013; 16:1088-94. [PMID: 24379966 PMCID: PMC3874095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 06/01/2013] [Indexed: 11/15/2022]
Abstract
OBJECTIVE(S) The present study was designed to investigate the antibacterial function and pharmacological effect of elephant garlic (Allium ampeloprasum var. ampeloprasum) on U2OS human osteosarcoma cells. MATERIALS AND METHODS Seven kinds of bacteria were reconstituted, inoculated and tested in this research to evaluate elephant garlic antibacterial activity. By the means of FACS analysis, cell proliferation assay, confocal laser scanning microscopy and Transwell migration assays, the effect of elephant garlic against U2OS human osteosarcoma cells was unveiled. Rerults: The antimicrobial activity of elephant garlic was stronger than ampicillin when used against Escherichia coli, Bacillus subtilis, Bacillus thuringiensis, Staphylococcus actinomycetes, and gray actinomycetes. Even at a very low concentration (12.5%), elephant garlic still had an antibacterial effect on common bacteria E. coli and S. aureus. The G0/G1 ratio of elephant garlic treated group cells increased while S phase decreased. Elephant garlic extract inhibited the growth of human osteosarcoma cells, U2OS, through preventing the transition from G1 phase to S phase. It reduced osteosarcoma cell, U2OS, invasion ability and significantly increased the proportion of apoptosis. It significantly affected the cytoskeleton generation. CONCLUSION Elephant garlic exhibits antibacterial property and has an inhibitory effect on osteosarcoma cells (U2OS) proliferation and cell activity, suggesting the mechanism of its anticancer effects on U2OS human osteosarcoma cells.
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Affiliation(s)
- Zehao Huang
- Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, China
| | - Jianwu Ren
- Corresponding author: Jain-Wu Ren, College of Biological Sciences and Biotechnology, Beijing Forestry University Beijing 10083, China. ;
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