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Zhao J, Sun H, Wang C, Shang D. Breast cancer therapy: from the perspective of glucose metabolism and glycosylation. Mol Biol Rep 2024; 51:546. [PMID: 38642246 DOI: 10.1007/s11033-024-09466-w] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 03/22/2024] [Indexed: 04/22/2024]
Abstract
Breast cancer is a leading cause of mortality and the most prevalent form of malignant tumor among women worldwide. Breast cancer cells exhibit an elevated glycolysis and altered glucose metabolism. Moreover, these cells display abnormal glycosylation patterns, influencing invasion, proliferation, metastasis, and drug resistance. Consequently, targeting glycolysis and mitigating abnormal glycosylation represent key therapeutic strategies for breast cancer. This review underscores the importance of protein glycosylation and glucose metabolism alterations in breast cancer. The current research efforts in developing effective interventions targeting glycolysis and glycosylation are further discussed.
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Affiliation(s)
- Jiaqi Zhao
- Department of Pharmacy, School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, China
| | - Haiting Sun
- Department of Pharmacy, School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, China
| | - Che Wang
- Department of Pharmacy, School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, China.
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, School of Life Science, Liaoning Normal University, Dalian, 116081, China.
| | - Dejing Shang
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, School of Life Science, Liaoning Normal University, Dalian, 116081, China.
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Sun Y, Li H, Duan X, Ma X, Liu C, Shang D. Chensinin-1b Alleviates DSS-Induced Inflammatory Bowel Disease by Inducing Macrophage Switching from the M1 to the M2 Phenotype. Biomedicines 2024; 12:345. [PMID: 38397947 PMCID: PMC10886634 DOI: 10.3390/biomedicines12020345] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/28/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024] Open
Abstract
Inflammatory bowel disease (IBD) is a chronic relapsing inflammatory disorder with an increasing prevalence worldwide. Macrophage polarization is involved in the pathogenesis of IBD. Repolarization of macrophage has thus emerged as a novel therapeutic approach for managing IBD. Chensinin-1b, derived from the skin of Rana chensinensis, is a derivative of a native antimicrobial peptide (AMP). It shows anti-inflammatory effects in sepsis models and can potentially modulate macrophage polarization. The objective of this research was to study the role of chensinin-1b in macrophage polarization and dextran sulfate sodium (DSS)-induced colitis. RAW264.7 macrophages were polarized to the M1 phenotype using lipopolysaccharide (LPS) and simultaneously administered chensinin-1b at various concentrations. The ability of chenisnin-1b to reorient macrophage polarization was assessed by ELISA, qRT-PCR, and flow cytometry analysis. The addition of chensinin-1b significantly restrained the expression of M1-associated proinflammatory cytokines and surface markers, including TNF-α, IL-6, NO, and CD86, and exaggerated the expression of M2-associated anti-inflammatory cytokines and surface markers, including IL-10, TGF-β1, Arg-1, Fizz1, Chil3, and CD206. Mechanistically, via Western Blotting, we revealed that chensinin-1b induces macrophage polarization from the M1 to the M2 phenotype by inhibiting the phosphorylation of nuclear factor-kappa B (NF-κB) and mitogen-activated protein kinase (MAPK). In mouse models of colitis, intraperitoneal administration of chensinin-1b alleviated symptoms induced by DSS, including weight loss, elevated disease activity index (DAI) scores, colon shortening, colonic tissue damage, and splenomegaly. Consistent with our in vitro data, chensinin-1b induced significant decreases in the expression of M1 phenotype biomarkers and increases in the expression of M2 phenotype biomarkers in the mouse colitis model. Furthermore, chensinin-1b treatment repressesed NF-κB phosphorylation in vivo. Overall, our data showed that chensinin-1b attenuates IBD by repolarizing macrophages from the M1 to the M2 phenotype, suggesting its potential as a therapeutic candidate for IBD.
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Affiliation(s)
- Yue Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Huiyu Li
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
| | - Xingpeng Duan
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Xiaoxiao Ma
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
| | - Chenxi Liu
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.S.)
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
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3
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Ji F, Tian G, Shang D, Jiang F. Antimicrobial peptide 2K4L disrupts the membrane of multidrug-resistant Acinetobacter baumannii and protects mice against sepsis. Front Microbiol 2023; 14:1258469. [PMID: 37942076 PMCID: PMC10628664 DOI: 10.3389/fmicb.2023.1258469] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 10/09/2023] [Indexed: 11/10/2023] Open
Abstract
Antimicrobial peptides represent a promising therapeutic alternative for the treatment of antibiotic-resistant bacterial infections. 2K4L is a rationally-designed analog of a short peptide temporin-1CEc, a natural peptide isolated and purified from the skin secretions of the Chinese brown frog Rana chensinensis by substituting amino acid residues. 2K4L adopt an α-helical confirm in a membrane-mimetic environment and displayed an improved and broad-spectrum antibacterial activity against sensitive and multidrug-resistant Gram-negative and Gram-positive bacterial strains. Here, the action mechanism of 2K4L on multidrug resistant Acinetobacter baumannii (MRAB) and protection on MRAB-infected mice was investigated. The results demonstrated high bactericidal activity of 2K4L against both a multidrug resistant A. baumannii 0227 strain (MRAB 0227) and a sensitive A. baumannii strain (AB 22934), indicating a potential therapeutic advantage of this peptide. Strong positively-charged residues significantly promoted the electrostatic interaction on 2K4L with lipopolysaccharides (LPS) of the bacterial outer membrane. High hydrophobicity and an α-helical confirm endowed 2K4L remarkably increase the permeability of A. baumannii cytoplasmic membrane by depolarization of membrane potential and disruption of membrane integration, as well as leakage of fluorescein from the liposomes. Additionally, 2K4L at low concentrations inhibited biofilm formation and degraded mature 1-day-old MRAB 0227 biofilms by reducing the expression of biofilm-related genes. In an invasive A. baumannii infection model, 2K4L enhanced the survival of sepsis mice and decreased the production of the proinflammatory cytokines downregulating the phosphorylation level of signaling protein in MAPK and NF-κB signaling pathways, indicating that 2K4L represents a novel therapeutic antibiotic candidate against invasive multidrug-resistant bacterial strain infections.
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Affiliation(s)
- Fangyu Ji
- School of Life Science, Liaoning Normal University, Dalian, China
| | - Guoxu Tian
- School of Life Science, Liaoning Normal University, Dalian, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian, China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Fengquan Jiang
- Department of Clinical Laboratory, The First Affiliated Hospital of Dalian Medical University, Dalian, China
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4
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Li Z, Qu W, Zhang D, Sun Y, Shang D. The antimicrobial peptide chensinin-1b alleviates the inflammatory response by targeting the TLR4/NF-κB signaling pathway and inhibits Pseudomonas aeruginosa infection and LPS-mediated sepsis. Biomed Pharmacother 2023; 165:115227. [PMID: 37536032 DOI: 10.1016/j.biopha.2023.115227] [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: 05/08/2023] [Revised: 07/24/2023] [Accepted: 07/24/2023] [Indexed: 08/05/2023] Open
Abstract
Excessive inflammatory responses are a major contributor to the high mortality associated with sepsis, a prevalent global complication. Therefore, the potential therapeutic strategy for sepsis involves targeting macrophages and reducing proinflammatory cytokine release. Chensinin-1b, an analog of the natural antimicrobial peptide derived from Rana chensinensis skin secretion, exhibits broad-spectrum antibacterial activity and adopts a random coil conformation in both PBS and membrane solution. By efficiently neutralizing LPS, chensinin-1b holds promise in alleviating LPS-induced inflammatory responses. In this study, we established a mouse septic shock model by exposing mice to multiple-drug-resistant Pseudomonas aeruginosa, as well as an endotoxin-mediated sepsis model induced by LPS. Administering chensinin-1b significantly prolonged the survival of the experimental mice, concurrently mitigating inflammatory responses and reducing organ damage. Additionally, we investigated the anti-inflammatory mechanism of chensinin-1b using a constructed LPS-induced mouse macrophage RAW264.7 inflammatory model. Our findings demonstrated that chensinin-1b effectively mitigated the excessive activation of the TLR4/NF-κB signaling pathway by directly neutralizing extracellular LPS, thus ameliorating the inflammatory response. Moreover, upon blocking the TLR4 signaling pathway, chensinin-1b further reduced the release of proinflammatory cytokines induced by LPS, indicating alternative modes of regulation. Notably, chensinin-1b rapidly entered RAW264.7 cells within 30 min via endocytosis, diffusing into the cytoplasm while retaining its anti-inflammatory properties intracellularly. Although further investigations are warranted to comprehensively elucidate the intracellular anti-inflammatory mechanism of chensinin-1b, our findings substantiate its possession of anti-inflammatory properties both intracellularly and extracellularly. Thus, chensinin-1b emerges as a promising candidate for mitigating excessive inflammatory responses associated with sepsis.
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Affiliation(s)
- Zhenjia Li
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Wenzhi Qu
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Dongdong Zhang
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Yue Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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Wang X, Feng L, Li M, Dong W, Luo X, Shang D. Membrane-active and DNA binding related double-action antimycobacterial mechanism of antimicrobial peptide W3R6 and its synthetic analogs. Biochim Biophys Acta Gen Subj 2023:130415. [PMID: 37336295 DOI: 10.1016/j.bbagen.2023.130415] [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: 04/18/2023] [Revised: 06/13/2023] [Accepted: 06/15/2023] [Indexed: 06/21/2023]
Abstract
The emergence of multidrug- or extremely drug-resistant M. tuberculosis strains has made very few drugs available for current tuberculosis treatment. Antimicrobial peptides can be employed as a promising alternative strategy for TB treatment. Here, we designed and synthesized a series of peptide sequences based on the structure-activity relationships of natural sequences of antimicrobial peptides. The peptide W3R6 and its analogs were screened and found to have potent antimycobacterial activity against M. smegmatis, and no hemolytic activity against human erythrocytes. The evidence from the mechanism of action study indicated that W3R6 and its analogs can interact with the mycobacterial membrane in a lytic manner and form pores on the outer membrane of M. smegmatis. Significant colocalization of D-W3R6 with mycobacterial DNA was observed by confocal laser scanning microscopy and DNA retardation assays, which suggested that the antimycobacterial mechanism of action of the peptide was associated with the unprotected genomic DNA of M. smegmatis. In general, W3R6 and its analogs act on not only the mycobacterial membrane but also the genomic DNA in the cytoplasm, which makes it difficult for mycobacteria to generate resistance due to the peptides having two targets. In addition, the peptides can effectively eliminate M. smegmatis cells from infected macrophages. Our findings indicated that the antimicrobial peptide W3R6 could be a novel lead compound to overcome the threat from drug-resistant M. tuberculosis strains in the development of potent AMPs for TB therapeutic applications.
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Affiliation(s)
- Xiaorui Wang
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Liubin Feng
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Mengmiao Li
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Weibing Dong
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
| | - Xueyue Luo
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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Zhang J, Sun Y, Sun C, Shang D. The antimicrobial peptide LK2(6)A(L) exhibits anti-inflammatory activity by binding to the myeloid differentiation 2 domain and protects against LPS-induced acute lung injury in mice. Bioorg Chem 2023; 132:106376. [PMID: 36706531 DOI: 10.1016/j.bioorg.2023.106376] [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: 10/16/2022] [Revised: 01/07/2023] [Accepted: 01/12/2023] [Indexed: 01/19/2023]
Abstract
Acute lung injury (ALI) is a life-threatening disease that is generally attributable to an uncontrolled inflammatory response in the lung, but there is a lack of effective treatments. At present, regulating the inflammatory response has become an important strategy for treating ALI. In the present study, LK2(6)A(L), a peptide derived from the natural antimicrobial peptide temporin-1CEa, inhibited lipopolysaccharide (LPS)-induced expression of tumor necrosis factor alpha (TNF-α), interleukin-6 (IL-6), and NO in RAW264.7 cells. Herein, the anti-inflammatory mechanism of LK2(6)A(L) was investigated. The RNA-sequencing (RNA-seq) results showed that LK2(6)A(L) significantly inhibited the TLR4-mediated NF-κB and MAPK signaling pathways in LPS-induced RAW264.7 cells. The results of co-immunoprecipitation (Co-IP), pull-down experiment, confocal laser scanning microscopy, and surface plasmon resonance (SPR) suggested that MD2 was the direct target of LK2(6)A(L). Chemical inhibition of MD2 and its knockdown abolished the anti-inflammatory effect of LK2(6)A(L). Molecular dynamic simulation indicated that LK2(6)A(L) could bind to the active domain of the MD2 hydrophobic pocket via six hydrogen bonds. The truncated peptides were designed based on analysis of the molecular docking of LK2(6)A(L) to MD2. The truncated peptide IS-7 showed strong affinity to MD2 and a remarkable inhibitory effect on pro-inflammatory factors that was comparable to the effect of LK2(6)A(L). Finally, LK2(6)A(L) and IS-7 relieved inflammatory symptoms and lung tissue destruction in the ALI mouse model. Overall, our study suggested that LK2(6)A(L) showed promising anti-inflammatory activity by targeting MD2, and the amino acid domain 7-13 was an important area that binds with MD2 and also an anti-inflammatory active region. LK2(6)A(L) and IS-7 may be potential new treatments for ALI and other acute inflammatory diseases.
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Affiliation(s)
- Juan Zhang
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Yue Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Chengpeng Sun
- College of Pharmacy, Dalian Medical University, Dalian 116044, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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7
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Tian Z, Yang L, Qi X, Zheng Q, Shang D, Cao J. Visual LAMP method for the detection of Vibrio vulnificus in aquatic products and environmental water. BMC Microbiol 2022; 22:256. [PMID: 36271365 PMCID: PMC9585733 DOI: 10.1186/s12866-022-02656-1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 08/29/2022] [Indexed: 11/11/2022] Open
Abstract
Background A visual, rapid, simple method was developed based on a loop-mediated isothermal amplification (LAMP) assay to detect Vibrio vulnificus in aquatic products and aquaculture waters. Results Genomic DNA was extracted from Vibrio vulnificus using the boiling method, and optimized primers were used to detect the gyrB gene using a visual LAMP method. The sensitivity of the assay was 10 fg/μL, and the obtained results were stable and reliable. Out of 655 aquatic product samples and 558 aquaculture water samples, the positive rates of Vibrio vulnificus detection were 9.01% and 8.60%, respectively, which are markedly higher than those of the traditional culture identification methods. Conclusion The relatively simple technical requirements, low equipment cost, and rapid detection make the visual LAMP method for the detection of Vibrio vulnificus a convenient choice for field detection in the aquaculture industry.
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Affiliation(s)
- Zhuo Tian
- Liaoning Normal University, Dalian, 116023, China.,Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China.,Dalian Customs Technology Center, Dalian, 116001, China
| | - Lili Yang
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China
| | - Xin Qi
- Dalian Customs Technology Center, Dalian, 116001, China
| | - Qiuyue Zheng
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China
| | - Dejing Shang
- Liaoning Normal University, Dalian, 116023, China.
| | - Jijuan Cao
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China.
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Shang D, Liu SM. [Clinical manifestation of odontogenic fibroma associated with tuberous sclerosis complex: a case report]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:186-188. [PMID: 35152656 DOI: 10.3760/cma.j.cn112144-20210524-00262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- D Shang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - S M Liu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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Guan Y, Sun Y, Shang D. Amine-functionalized POSS cross-linked the poly(imide siloxane) block copolymers nanocomposites: preparation, thermal properties, against atomic oxygen erosion. Journal of Macromolecular Science, Part A 2022. [DOI: 10.1080/10601325.2022.2026785] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Yue Guan
- School of Life Science, Liaoning Normal University, Dalian, China
| | - Yue Sun
- School of Life Science, Liaoning Normal University, Dalian, China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian, China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
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Guo F, Zhang Y, Dong W, Guan Y, Shang D. Effect of hydrophobicity on distinct anticancer mechanism of antimicrobial peptide chensinin-1b and its lipoanalog PA-C1b in breast cancer cells. Int J Biochem Cell Biol 2022; 143:106156. [PMID: 34999227 DOI: 10.1016/j.biocel.2022.106156] [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: 08/31/2021] [Revised: 12/13/2021] [Accepted: 01/05/2022] [Indexed: 12/21/2022]
Abstract
Chensinin-1b and its lipoanalogs demonstrate different anticancer activities against selected cancer cells, and the anticancer activity of PA-C1b is improved up to 3-fold compared with that of the parent peptide chensinin-1b. However, detailing the mechanism of action of these peptides is required to better understand the structure-function relationship. In this study, chensinin-1b and PA-C1b were selected as the representative peptides to investigate the mode of action in cancer cells. The results indicated that the boundary of the cell membrane was broken when the cells were treated with chensinin-1b, while that of cells treated with PA-C1b remained intact based on morphological changes. Apoptosis assays indicated that PA-C1b induced MCF-7 cancer cell apoptosis, while chensinin-1b mainly damaged the cell membrane. MCF-7 cancer cells treated with the peptides induced the loss of mitochondrial membrane potential, and cytochrome c was released from mitochondria, but PA-C1b enhanced ROS generation. Additionally, PA-C1b uptake occurred via an energy-dependent pathway and was inhibited by selected endocytosis inhibitors. Furthermore, treatment of MCF-7 cells with PA-C1b suppressed Bcl-2 mRNA levels and increased Bax mRNA levels, upregulated the expression of the proapoptotic protein Bax and downregulated the expression of the antiapoptotic protein Bcl-2. These results indicate that the anticancer mechanism of AMPs may be considerably affected by only a slight difference in the hydrophobicity of the two peptides; and such a study may facilitate the design of novel peptide-based anticancer agents.
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Affiliation(s)
- Feilu Guo
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Yao Zhang
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Weibing Dong
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
| | - Yue Guan
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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Ji F, Zhao Y, Jiang F, Shang D. Membrane mechanism of temporin-1CEc, an antimicrobial peptide isolated from the skin secretions of Rana chensinensis, and its systemic analogs. Bioorg Chem 2021; 119:105544. [PMID: 34953322 DOI: 10.1016/j.bioorg.2021.105544] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 09/18/2021] [Revised: 11/29/2021] [Accepted: 12/04/2021] [Indexed: 12/15/2022]
Abstract
Antimicrobial peptides (AMPs) are new and powerful target molecules in the development of new antibacterial agents. Temporin-1CEc, a natural peptide isolated and purified from the skin secretions of the Chinese brown frog Rana chensinensis, exhibits low or no antibacterial activity against gram-negative and gram-positive bacteria, which limits its potential therapeutic use; however, it displays low hemolysis to human erythrocytes. Here, a series of temporin-1CEc analogs was designed and synthesized by amino acid residue substitutions based on cationicity, hydrophobicity, amphipathicity and secondary structure to understand the structure-activity relationships of this peptide in depth. The results showed that all of the analogs, except for 2K and 4K, had significantly improved antibacterial activity against the tested standard bacterial strains and multidrug-resistant bacterial strains compared to temporin-1CEc. 2K2L and 2K4L, but not 4K2L and 4K4L, showed the strongest antibacterial activity compared with their parent peptides 2K and 4K, suggesting that peptide hydrophobicity plays a more important role in antibacterial activity than cationicity for this series of AMPs. However, the antibacterial activity of the 6 Trp-containing analogs of 2K4L decreased with a further increase in hydrophobicity based on the results of 2K4L, indicating that it is more important to balance cationicity and hydrophobicity. Moreover, an increase in AMP hydrophobicity led to hemolysis. Notably, all of the peptides adopted α-helical structures in 50% trifluoroethanol/water and 30 mM SDS solutions. 2K2L and 2K4L displayed broad-spectrum antibacterial activity against sensitive and multidrug-resistant bacteria, effectively killing the tested multidrug resistant strain Staphylococcus epidermidis (MRSE1208). 2K2L and 2K4L were able to increase the permeability of the outer and inner membranes by depolarization and disturb the integration of the cytoplasmic membrane of MRSE1208 cells, leading to leakage of its cellular contents. In addition, 2K2L and 2K4L at low concentrations inhibited biofilm formation and degraded mature 1-day-old MRSE1208 biofilms. Notably, 2K2L and 2K4L inhibited the formation of MRSE1208 biofilms at concentrations below its MIC value, suggesting that the peptide may exert an inhibitory effect through not only direct antimicrobial activity but also a biofilm-specific mechanism. Collectively, these results suggest that 2K2L and 2K4L could be effective antibiotics against multidrug-resistant bacterial strains.
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Affiliation(s)
- Fangyu Ji
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Ying Zhao
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Fengquan Jiang
- Department of Clinical Laboratory, the First Affiliated Hospital of Dalian Medical University, Dalian 116000, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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12
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Li Y, Sun Y, Dong W, Zhu C, Guan Y, Shang D. Acylation of antimicrobial peptide-plasmid DNA vectors formulation for efficient gene delivery in cancer therapy. Colloids Surf B Biointerfaces 2021; 208:112069. [PMID: 34478957 DOI: 10.1016/j.colsurfb.2021.112069] [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: 06/11/2021] [Revised: 08/19/2021] [Accepted: 08/24/2021] [Indexed: 11/16/2022]
Abstract
Antimicrobial peptides/DNA complexes were designed based on AMPs chensinin-1b and its corresponding lipo-chensinin-1b conjugated with an aliphatic acid with different chain lengths and therapeutic genes. The main goal of such a complex includes two aspects: first, antimicrobial peptides deliver therapeutic genes to cancer cells and genes expressed in targeted tissue for cancer gene therapy, and, second, the antimicrobial peptide kills cancer cells when used alone as an anticancer agent. This study presents a model composed of chensinin-1b and its lipo-chensinin-1b and eGFP plasmids, which were used as reporter genes, and the final peptide/eGFP plasmid complexes were analyzed by TEM and DLS. The gene transfection efficiency of the complex was evaluated by a microplate reader, FACS and CLSM. Compared with Lipo2000, the antimicrobial peptide showed specific selectivity for transfection against cancer cells and mammalian cells. The peptides chensinin-1b and lipo-chensinin-1b binding with the eGFP plasmid displayed optimal transfection efficiencies at a mass ratio of 8. In addition, PA-C1b can deliver p53-eGFP plasmids into MCF-7 cancer cells, and the proliferation of cells was inhibited and even caused cell death. Overall, PA-C1b was screened and found to have the highest transfection efficiency for gene delivery and good cellular uptake capability. The in vivo transfection ability of PA-C1b was investigated using a tumor-bearing mouse model, and the transfection efficiency reflected by the fluorescence of expressed GFP was determined by in vivo imaging. Conclusively, the antimicrobial peptide PA-C1b could be used as the nonviral vector with high efficiency for cancer gene therapy.
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Affiliation(s)
- Yue Li
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Yue Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Weibing Dong
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
| | - Chengdong Zhu
- School of Life Science, Liaoning Normal University, Dalian 116081, China; School of Physical Education, Liaoning Normal University, Dalian 116081, China
| | - Yue Guan
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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13
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Wang C, Huang L, Li R, Wang Y, Wu X, Shang D. Synergistic Therapy of Doxorubicin with Cationic Anticancer Peptide L-K6 Reverses Multidrug Resistance in MCF-7/ADR Cancer Cells In Vitro via P-glycoprotein Inhibition. Int J Pept Res Ther 2021. [DOI: 10.1007/s10989-021-10253-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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14
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Zhang J, Shang D. [Research progress of TLR4 signaling pathway and its targeted drugs]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2021; 37:657-662. [PMID: 34140078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The innate immune system uses pattern recognition receptors (PRRs) or other molecular receptors to recognize pathogenic microorganisms such as the invading bacteria, and prevents the spread of infection by triggering an inflammatory response, which plays a vital role in antimicrobial defense. Toll-like receptor-4 (TLR4) is the core of innate immune system in mammals and plays a key role in bacterial endotoxin-mediated inflammation. TLR4 recognizes lipopolysaccharide (LPS) on the cell wall of Gram-negative bacteria, thereby activating the TLR4 signaling pathway, releasing pro-inflammatory factors and chemokines, and inducing inflammation. Currently, drugs targeting the TLR4 signaling pathway mainly act on LPS and its receptor LPS binding protein (LBP), CD14, myeloid differentiation protein 2 (MD2), and TLR4, such as lipid A analogs and natural products as well as their derivatives, and natural and synthetic peptides and proteins, etc. They have potential therapeutic effects in the treatment of autoimmune diseases, acute and chronic inflammation, cardiovascular diseases, and neurological diseases.
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Affiliation(s)
- Juan Zhang
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China. *Corresponding author, E-mail:
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15
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Guan Y, Fan P, Dong W, Shang D. A covalent triazine-based framework containing hydrogen-bonding for highly drug loading and pH-responsive release. Journal of Macromolecular Science, Part A 2021. [DOI: 10.1080/10601325.2021.1922085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Yue Guan
- School of Life Science, Liaoning Normal University, Dalian, China
| | - Peng Fan
- School of Life Science, Liaoning Normal University, Dalian, China
| | - Weibing Dong
- School of Life Science, Liaoning Normal University, Dalian, China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian, China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
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Shang D, Han X, Du W, Kou Z, Jiang F. Trp-Containing Antibacterial Peptides Impair Quorum Sensing and Biofilm Development in Multidrug-Resistant Pseudomonas aeruginosa and Exhibit Synergistic Effects With Antibiotics. Front Microbiol 2021; 12:611009. [PMID: 33643239 PMCID: PMC7906020 DOI: 10.3389/fmicb.2021.611009] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [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: 09/28/2020] [Accepted: 01/20/2021] [Indexed: 12/12/2022] Open
Abstract
Pseudomonas aeruginosa uses quorum sensing (QS) to control virulence, biofilm formation and antibiotic efflux pump expression. The development of effective small molecules targeting the QS system and biofilm formation represents a novel attractive strategy. In this present study, the effects of a series of Trp-containing peptides on the QS-regulated virulence and biofilm development of multidrug-resistant P. aeruginosa, as well as their synergistic antibacterial activity with three classes of traditional chemical antibiotics were investigated. The results showed that Trp-containing peptides at low concentrations reduced the production of QS-regulated virulence factors by downregulating the gene expression of both the las and rhl systems in the strain MRPA0108. Biofilm formation was inhibited in a concentration-dependent manner, which was associated with extracellular polysaccharide production inhibition by downregulating pelA, algD, and pslA transcription. These changes correlated with alterations in the extracellular production of pseudomonal virulence factors and swarming motility. In addition, the combination of Trp-containing peptides at low concentration with the antibiotics ceftazidime and piperacillin provided synergistic effects. Notably, L11W and L12W showed the highest synergy with ceftazidime and piperacillin. A mechanistic study demonstrated that the Trp-containing peptides, especially L12W, significantly decreased β-lactamase activity and expression of efflux pump genes OprM, MexX, and MexA, resulting in a reduction in antibiotic efflux from MRPA0108 cells and thus increasing the antibacterial activity of these antibiotics against MRPA0108.
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Affiliation(s)
- Dejing Shang
- School of Life Sciences, Liaoning Normal University, Dalian, China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Xue Han
- School of Life Sciences, Liaoning Normal University, Dalian, China
| | - Wanying Du
- School of Life Sciences, Liaoning Normal University, Dalian, China
| | - Zhiru Kou
- School of Life Sciences, Liaoning Normal University, Dalian, China
| | - Fengquan Jiang
- Clinical Laboratory Department of the First Affiliated Hospital, Dalian Medical University, Dalian, China
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Li X, Shang D, Shen H, Song J, Hao G, Tian Y. Corrigendum to “ZSCAN16 promotes proliferation, migration and invasion of bladder cancer via regulating NF-kB, AKT, mTOR, P38 and other genes” [Biomed. Pharmacother. 126 (2020) 110066]. Pharmacotherapy 2020; 130:110858. [DOI: 10.1016/j.biopha.2020.110858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Dong W, Wen J, Li Y, Wang C, Sun S, Shang D. Targeted antimicrobial peptide delivery in vivo to tumor with near infrared photoactivated mesoporous silica nanoparticles. Int J Pharm 2020; 588:119767. [PMID: 32800935 DOI: 10.1016/j.ijpharm.2020.119767] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 04/19/2020] [Revised: 07/23/2020] [Accepted: 08/10/2020] [Indexed: 12/11/2022]
Abstract
Antimicrobial peptide PA-C1b (chensinin-1b conjugated with palmitic acid) showed potent anticancer activity with no obvious hemolytic activity, which made it a potential agent for treating cancers. However, after in vivo administration, peptides can be degraded by proteases because there is no effective protection. In this study, a tumor-targeting photoresponsive antimicrobial peptide delivery system was developed, and the peptide PA-C1b labeled with the dye sulfo-cyanine7 (Cy7) was loaded into mesoporous silica nanoparticles (MSNs). The final MSN@Cy7-PA-C1b nanoparticles were wrapped by graphene oxide (GO), and then folic acid was conjugated to the surface of the MSNs for targeting purposes. The final MSN@Cy7-PA-C1b@FA-GO nanoparticles were constructed to allow light-mediated peptide release and folate receptor-targeted cancer therapy. The Cy7 dye serves as a real-time indicator, and GO acts as a gatekeeper to prevent leakage of the loaded peptides in the absence of near-infrared light irradiation. Upon light irradiation, the GO wrapping detaches, and the photoresponsive peptide delivery system works well both in in vitro cell experiments and during in vivo administration in mouse tumor experiments. The construction of the MSN@Cy7-PA-C1b@FA-GO platform provides a novel approach to deliver antimicrobial peptides in vivo for the treatment of infections by pathogenic microorganisms and cancers.
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Affiliation(s)
- Weibing Dong
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Jia Wen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yue Li
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Cui Wang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Department of Neurology, Dalian Municipal Central Hospital, Dalian 116033, China
| | - Shiguo Sun
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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19
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Han X, Kou Z, Jiang F, Sun X, Shang D. Interactions of Designed Trp-Containing Antimicrobial Peptides with DNA of Multidrug-Resistant Pseudomonas aeruginosa. DNA Cell Biol 2020; 40:414-424. [PMID: 32023094 DOI: 10.1089/dna.2019.4874] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
To investigate the intracellular mechanisms of seven Trp-containing peptides in clinically isolated multidrug-resistant Pseudomonas aeruginosa (MRPA0108). The results showed that the Trp-containing peptides had high antibacterial activity against the MRPA0108 strain, with minimal inhibitory concentration (MIC) values ranging from 6.25 to 25 μM. The peptides rapidly and completely killed the MRPA0108 at a concentration of 16 × MIC at 60-90 min. The Trp-containing peptides were found to penetrate the bacterial cell membrane and accumulate in the cells. A DNA gel retardation assay indicated that the peptides were able to bind with the genomic DNA of MRPA0108 cells; L5W exhibited a stronger DNA binding ability than that of the other peptides, and the ratio of peptide to DNA was 0.62/1. Next, the UV absorption spectrum of the DNA indicated that L5W interacted with the MRPA0108 genomic DNA and intercalated into the groove of the DNA molecule, resulting in loosening of the double-helical structure of the originally contracted DNA and leading to the occurrence of a hyperchromic effect. The circular dichroism spectrum suggested that I1W and L5W associated with the DNA via a trench combination mode resulting from the compact structure of the DNA double helix and reduction in ππ accumulation between base pairs. Furthermore, real-time quantitative PCR demonstrated that the Trp-containing peptides could downregulate the expression of DNA replication-initiating genes in MRPA0108 cells. MRPA0108 DNA may be a potential active target for the antimicrobial activity of Trp-containing peptides.
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Affiliation(s)
- Xue Han
- School of Life Science, Liaoning Normal University, Dalian, China
| | - Zhiru Kou
- School of Life Science, Liaoning Normal University, Dalian, China
| | - Fengquan Jiang
- Department of Clinical Laboratory, the First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Xiaomi Sun
- School of Life Science, Liaoning Normal University, Dalian, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian, China.,Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
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20
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Dong W, Luo X, Sun Y, Li Y, Wang C, Guan Y, Shang D. Binding Properties of DNA and Antimicrobial Peptide Chensinin-1b Containing Lipophilic Alkyl Tails. J Fluoresc 2020; 30:131-142. [DOI: 10.1007/s10895-019-02478-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 12/26/2019] [Indexed: 11/29/2022]
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21
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Shang D, Liu Y, Jiang F, Ji F, Wang H, Han X. Synergistic Antibacterial Activity of Designed Trp-Containing Antibacterial Peptides in Combination With Antibiotics Against Multidrug-Resistant Staphylococcus epidermidis. Front Microbiol 2019; 10:2719. [PMID: 31824473 PMCID: PMC6886405 DOI: 10.3389/fmicb.2019.02719] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [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: 06/10/2019] [Accepted: 11/08/2019] [Indexed: 01/10/2023] Open
Abstract
Multidrug resistance among various bacterial strains is leading to worldwide resistance to a wide range of antibiotics. Combination therapy involving current antibiotics and other biological or chemical molecules represents an attractive novel strategy. In this study, we investigated the synergistic antibacterial activity of a series of Trp-containing antimicrobial peptides (AMPs) with four classes of traditional chemical antibiotics that are inactive against multidrug-resistant Staphylococcus epidermidis (MRSE) in vitro and in vivo. Among the antibiotics that we studied, penicillin, ampicillin and erythromycin showed a distinct synergistic effect in combination with all of the Trp-containing AMPs, represented by a fractional inhibitory concentration index (FICI) of <0.5. The antibacterial activities were noticeably improved, with 32-to 64-fold reductions in the MIC values for ampicillin and 16- to 32-fold reductions in the MIC values for erythromycin and penicillin. Tetracycline showed synergistic activity with only I1WL5W but additive activity with L11W, L12W, and I4WL5W. Ceftazidime exhibited additive activity with the Trp-containing peptides. In addition, the antibiotics in combination with the peptide significantly inhibited biofilm formation by MRSE 1208. A mechanistic study demonstrated that the Trp-containing peptides, especially I1WL5W and I4WL5W, which contain two tryptophan residues, disrupted bacterial inner and outer membranes, which promoted antibiotic delivery into the cytoplasm and access to cytoplasmic targets; however, L11W and L12W may have increased intracellular antibiotic concentrations by decreasing blaZ, tet(m) and msrA expression. Importantly, strong synergistic activity against the MRSE 1208 strain was observed for the combination of I1WL5W and penicillin in a mouse infection model. Thus, the combination of AMPs and traditional antibiotics could be a promising option for the prevention of acute and chronic infections caused by MRSE.
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Affiliation(s)
- Dejing Shang
- School of Life Sciences, Liaoning Normal University, Dalian, China.,Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Yue Liu
- School of Life Sciences, Liaoning Normal University, Dalian, China
| | - Fengquan Jiang
- School of Life Sciences, Liaoning Normal University, Dalian, China.,Clinical Laboratory Department of the First Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Fangyu Ji
- School of Life Sciences, Liaoning Normal University, Dalian, China
| | - He Wang
- School of Life Sciences, Liaoning Normal University, Dalian, China
| | - Xue Han
- School of Life Sciences, Liaoning Normal University, Dalian, China
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22
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Shang D, Ma L. [Ectrodactyly ectodermal dysplasia-cleft lip/palate syndrome: a case report]. Zhonghua Kou Qiang Yi Xue Za Zhi 2019; 54:770-772. [PMID: 31683385 DOI: 10.3760/cma.j.issn.1002-0098.2019.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- D Shang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081 China (Shang Duo is working on the Department of Oral Maxillofacial Surgery, Affiliated Hospital of Inner Mongolia Medical University, Huhhot 010059, China)
| | - L Ma
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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23
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Guo M, Zhang Y, Shang D, Yu J, Yue J. 18F-Fluorodeoxyglucose Positron Emission Tomography May not Quantify Aseptic Radiation-induced Lung Inflammation. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Shang D, Meng X, Zhang D, Kou Z. Antibacterial activity of chensinin-1b, a peptide with a random coil conformation, against multiple-drug-resistant Pseudomonas aeruginosa. Biochem Pharmacol 2017; 143:65-78. [PMID: 28756209 DOI: 10.1016/j.bcp.2017.07.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 05/08/2017] [Accepted: 07/19/2017] [Indexed: 11/16/2022]
Abstract
Nosocomial infections caused by Pseudomonas aeruginosa are difficult to treat due to the low permeability of its outer membrane as well as to its remarkable ability to acquire further resistance to antibiotics. Chensinin-1b exhibited antibacterial activity against the tested multiple-drug-resistant bacteria with a MIC ranging between 1.56 and 50μM, except E. cloacae strain 0320 (MREC0320), P. fluorescens strain 0322 (MRPF0322) and E. aerogenes strain 0320 (MREA0320). However, the MIC (25μM) of chensinin-1b to multiple-drug-resistant P. aeruginosa strain (MRPA 0108) was 16-fold higher than that observed to P. aeruginosa susceptible strain CGMCC 1.860 (PA1860). Chensinin-1b was able to disturb the integration of the cytoplasmic membrane of PA1860 and MRPA0108 cells similarly, but the outer membrane permeability of MRPA0108 cells was significantly lower. This low permeability was associated with increased expression of lipopolysaccharide (LPS) in the outer membrane and a decrease in negatively charged phospholipids in the outer membrane leaflet. In addition, the biofilm of MRPA0108 was responsible for the reduced susceptibility to chensinin-1b. A higher concentration of chensinin-1b (12.5µM) was required to maximally inhibit the formation of MRPA0108 biofilm. Notably, chensinin-1b inhibited the formation of MRPA0108 biofilm at concentrations below its MIC value by down-regulating the level of PelA, algD, and PslA gene transcription. Importantly, chensinin-1b had a significant antibacterial effect against MRPA0108 in vivo. Administration of chensinin-1b to mice infected with MRPA 0108 significantly increased survival by 50-70%. Moreover, chensinin-1b reduced the production of pro-inflammatory mediators and correspondingly reduced lung and liver tissue damage in the mouse model of septic shock induced by MRPA 0108. Collectively, these results suggest that chensinin-1b could be an effective antibiotic against multiple-drug-resistant bacterial strains.
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Affiliation(s)
- Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
| | - Xin Meng
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Dongdong Zhang
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Zhiru Kou
- School of Life Science, Liaoning Normal University, Dalian 116081, China
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Liu H, Zhang P, Shang D, Shi X, Lu Z, Liu L, Shen M, Tu Z. TARGETING HEAT SHOCK PROTEIN 90 AND ITS DOWNSTREAM SIGNALING HUBS FOR THE TREATMENT OF MANTLE CELL LYMPHOMA. Hematol Oncol 2017. [DOI: 10.1002/hon.2439_171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- H. Liu
- School of Pharmacy; Jiangsu University; Zhenjiang China
| | - P. Zhang
- School of Pharmacy; Jiangsu University; Zhenjiang China
| | - D. Shang
- Institute of Life Sciences; Jiangsu University; Zhenjiang China
| | - X. Shi
- Department of Hematology; Affiliated Hospital of Jiangsu University; Zhenjiang China
| | - Z. Lu
- School of Pharmacy; Jiangsu University; Zhenjiang China
| | - L. Liu
- Institute of Life Sciences; Jiangsu University; Zhenjiang China
| | - M. Shen
- Institute of Life Sciences; Jiangsu University; Zhenjiang China
| | - Z. Tu
- Institute of Life Sciences; Jiangsu University; Zhenjiang China
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Wang W, Qu X, Dang X, Shang D, Yang L, Li Y, Xu D, Martin JG, Hamid Q, Liu J, Chang Y. Human β-defensin-3 induces IL-8 release and apoptosis in airway smooth muscle cells. Clin Exp Allergy 2017; 47:1138-1149. [PMID: 28437599 DOI: 10.1111/cea.12943] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 04/12/2017] [Accepted: 04/14/2017] [Indexed: 12/23/2022]
Abstract
BACKGROUND Human airway smooth muscle cells (ASMCs) may have a pro-inflammatory role through the release of inflammatory mediators. Increasing evidence indicates that human β-defensins (HBDs) are related to pathogenesis of asthma. OBJECTIVES To examine the plasma level of HBD-1, HBD-2 and HBD-3 in asthmatic patients and the expression of their mouse orthologues in the lung tissue of a mouse model of chronic severe asthma. Further to investigate the effect of HBD-3 on the release of the pro-inflammatory cytokine IL-8 and to explore the mechanisms. METHODS The plasma levels of HBD-1, HBD-2 and HBD-3 from 34 healthy controls and 25 asthmatic patients were determined by ELISA. The expression of mouse β-defensins MBD-1, MBD-3 and MBD-14 in the lung tissue of asthmatic mice was detected by Western blot. The ASMCs were cultured with HBD-3 for 24 hour, and then the supernatant level of IL-8 was evaluated by ELISA and the cell viability was examined by WST-1 assay. The signalling pathway was investigated with blocking antibodies or pharmacological inhibitors. RESULTS The plasma levels of HBD-1 and HBD-3 were elevated in asthmatic patients, and the expression of MBD-14, the mouse orthologue for HBD-3, was increased in asthmatic mice. HBD-3-induced IL-8 production in a CCR6 receptor-specific manner and was dependent on multiple signalling pathways. Moreover, HBD-3-induced cell apoptosis concurrently, which was dependent on the ERK1/2 MAPK pathway. Mitochondrial ROS regulated both HBD-3-induced IL-8 production and cell apoptosis. CONCLUSIONS AND CLINICAL RELEVANCE These observations provide clear evidence of an important new mechanism for the promotion of airway inflammation and tissue remodelling with potential relevance for the treatment of asthma.
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Affiliation(s)
- W Wang
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - X Qu
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - X Dang
- Department of Respiration, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - D Shang
- Department of Respiration, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - L Yang
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Y Li
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - D Xu
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - J G Martin
- Meakins-Christie Laboratories and Respiratory Division, The Research Institute of the McGill University Health Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Q Hamid
- Meakins-Christie Laboratories and Respiratory Division, The Research Institute of the McGill University Health Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada.,College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - J Liu
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Y Chang
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
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Guan Y, Dong W, Wang C, Shang D. Highly refractive polyimides containing pyridine and sulfur units: synthesis and thermal, mechanical, solubility and optical properties. POLYM INT 2017. [DOI: 10.1002/pi.5359] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yue Guan
- School of Life Science; Liaoning Normal University; Dalian China
| | - Weibing Dong
- School of Life Science; Liaoning Normal University; Dalian China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery; Liaoning Normal University; Dalian China
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian China
| | - Che Wang
- Department of Pharmacy, School of Chemistry and Chemical Engineering; Liaoning Normal University; Dalian China
| | - Dejing Shang
- School of Life Science; Liaoning Normal University; Dalian China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery; Liaoning Normal University; Dalian China
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Dong W, Dong Z, Mao X, Sun Y, Li F, Shang D. Structure-activity analysis and biological studies of chensinin-1b analogues. Acta Biomater 2016; 37:59-68. [PMID: 27060618 DOI: 10.1016/j.actbio.2016.04.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 12/09/2015] [Revised: 03/28/2016] [Accepted: 04/05/2016] [Indexed: 11/17/2022]
Abstract
UNLABELLED Chensinin-1b shows a potent and broad-spectrum bactericidal activity and no hemolytic activity and thus is a potential therapeutic agent against bacterial infection. The NMR structure of chensinin-1b consists of a partially α-helical region (residues 8-14) in a membrane-mimic environment that is distinct from other common antimicrobial peptides. However, further analysis of the structural features of chensinin-1b is required to better understand its bactericidal activity. In this study, a series of N- and C-terminally truncated or amino acid-substituted chensinin-1b analogues were synthesized. Next, the bactericidal activity and bacterial membrane effects of the analogues were investigated. The results indicated that the N-terminal residues play a more significant role than the C-terminal residues in the antimicrobial activity of chensinin-1b. The removal of five amino acids from the C-terminus of chensinin-1b did not affect its biological properties, but helix disruption significantly decreased bactericidal activity. The substitution of positively charged residues increased the helicity and antimicrobial activity of the peptide. We also identified a novel analogue [R(4),R(10)]C1b(3-13) that exhibited similar bactericidal properties with its parent peptide chensinin-1b. Electrostatic interactions between the selected analogues and lipopolysaccharides or cells were detected using isothermal titration calorimetry or zeta potential. The thermodynamic parameters ΔH and ΔS for [R(4),R(10)]C1b(3-13) were -20.48kcalmol(-1) and -0.0408kcalmol(-1)deg(-1), respectively. Chensinin-1b yielded similar results of -26.36kcalmol(-1) and -0.0559kcalmol(-1)deg(-1) for ΔH and ΔS, respectively. These results are consistence with their antimicrobial activities. Lastly, membrane depolarization studies showed that selected analogues exerted bactericidal activity by damaging the cytoplasmic membrane. STATEMENT OF SIGNIFICANCE Antimicrobial peptide chensinin-1b is a candidate for the development of new drugs and a template for the design of synthetic analogues. It mainly exhibits a random coil conformation in membrane environment, and in this manuscript, we characterized the structure of chensinin-1b using NMR spectroscopy, its structure is different than the structures of magainin 2, which has an α-helical conformation and indolicidin, which has a random coil structure. The structural features of chensinin-1b that are required for its potent bactericidal activity were also elucidated. Based on these data, we can fully understand the structure-activity relationship of such peptide and identified a novel analogue with properties that make it an attractive topic for future therapeutic research.
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Affiliation(s)
- Weibing Dong
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Zhe Dong
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China; Instrumental Analysis Center, Inner Mongolia University for Nationalities, Tongliao 028043, China
| | - Xiaoman Mao
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Yue Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Fei Li
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China.
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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Shang D, Zhang Q, Dong W, Liang H, Bi X. The effects of LPS on the activity of Trp-containing antimicrobial peptides against Gram-negative bacteria and endotoxin neutralization. Acta Biomater 2016; 33:153-65. [PMID: 26804205 DOI: 10.1016/j.actbio.2016.01.019] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 01/11/2016] [Accepted: 01/18/2016] [Indexed: 02/06/2023]
Abstract
A series of synthesized Trp-containing antimicrobial peptides showed significantly different antimicrobial activity against Gram-negative bacteria despite having similar components and amino acid sequences and the same net positive charge and hydrophobicity. Lipopolysaccharide (LPS) in the outer membrane is a permeability barrier to prevent antimicrobial peptides from crossing into Gram-negative bacteria. We investigated the interaction of five Trp-containing peptides, I1W, I4W, L5W, L11W and L12W, with LPS using circular dichroism (CD), IR spectroscopy, isothermal titration calorimetry (ITC), dynamic light scattering (DLS), zeta-potential measurements and confocal laser scanning microscopy, to address whether bacterial LPS is responsible for the different susceptibilities of Gram-negative bacteria to Trp-containing peptides. Our data indicate that I1W and I4W penetrated the LPS layer and killed Gram-negative bacteria by a "self-promoted uptake" pathway in which the peptides first approach LPS by electrostatic forces and then dissociate LPS micelle. This process results in disorganization of the LPS leaflet and promotes the ability of the peptide to cross the outer membrane into the inner membrane and disrupt the cytoplasmic membrane. Although L5W, L11W and L12W strongly bind to LPS bilayers and depolarize bacterial cytoplasmic membranes, similar to I1W and I4W, they are unable to destabilize LPS aggregates and traverse through the tightly packed LPS molecules. This study increases our understanding of the mechanism of action of these peptides in the LPS outer membrane and will help in the development of a potent broad-spectrum antibiotic for future therapeutic purposes. STATEMENT OF SIGNIFICANCE Tryptophan (Trp) residues show a strong preference for the interfacial region of biological membranes, and this property endows Trp-containing peptides with the unique ability to interact with the surface of bacterial cell membranes. In this manuscript, we report the membrane interaction of Trp-containing peptide to address whether bacterial LPS is responsible for the different susceptibilities of Gram-negative bacteria to Trp-containing peptides. Based on the data collected, we propose a molecular mechanism for the peptide-LPS interactions that allows the peptides to traverse or prevents them from transversing the LPS layer and the target inner membrane. The data should help in the development of a potent broad-spectrum antibiotic for future therapeutic purposes.
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Dong W, Guan Y, Shang D. Novel soluble polyimides containing pyridine and fluorinated units: preparation, characterization, and optical and dielectric properties. RSC Adv 2016. [DOI: 10.1039/c6ra00322b] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
To acquire low dielectric constant polyimide films with good mechanical and thermal properties and low CTE applied in microelectronic fields, three novel polyimides containing pyridine and –C(CF3)2– groups were firstly designed and synthesized.
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Affiliation(s)
- Weibing Dong
- School of Life Science
- Liaoning Normal University
- Dalian 116081
- China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery
| | - Yue Guan
- School of Life Science
- Liaoning Normal University
- Dalian 116081
- China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery
| | - Dejing Shang
- School of Life Science
- Liaoning Normal University
- Dalian 116081
- China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery
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31
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Dong W, Sun Y, Shang D. Interactions between chensinin-1, a natural antimicrobial peptide derived fromRana chensinensis, and lipopolysaccharide. Biopolymers 2015; 103:719-26. [DOI: 10.1002/bip.22737] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 08/09/2015] [Accepted: 08/27/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Weibing Dong
- School of Life Science; Liaoning Normal University; Dalian 116081 China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery; Liaoning Normal University; Dalian 116081 China
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian 116024 China
| | - Yue Sun
- School of Life Science; Liaoning Normal University; Dalian 116081 China
| | - Dejing Shang
- School of Life Science; Liaoning Normal University; Dalian 116081 China
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery; Liaoning Normal University; Dalian 116081 China
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Liu J, Yan Q, Luo F, Shang D, Wu D, Zhang H, Shang X, Kang X, Abdo M, Liu B, Ma Y, Xin Y. Acute cholecystitis associated with infection of Enterobacteriaceae from gut microbiota. Clin Microbiol Infect 2015; 21:851.e1-9. [PMID: 26025761 DOI: 10.1016/j.cmi.2015.05.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [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: 11/16/2014] [Revised: 03/03/2015] [Accepted: 05/12/2015] [Indexed: 02/08/2023]
Abstract
Acute cholecystitis (AC) is one of the most common surgical diseases. Bacterial infection accounts for 50% to 85% of the disease's onset. Since there is a close relationship between the biliary system and the gut, the aims of this study were to characterize and determine the influence of gut microbiota on AC, to detect the pathogenic microorganism in the biliary system, and to explore the relationship between the gut and bile microbiota of patients with AC. A total of 185 713 high-quality sequence reads were generated from the faecal samples of 15 patients and 13 healthy controls by 16S rRNA gene pyrosequencing. Patients' samples were significantly enriched in Akkermansia, Enterobacter and Escherichia/Shigella group. The healthy controls, however, showed significant enrichment of Clostridiales, Coprococcus, Coprobacillaceae, Paraprevotella, Turicibacter and TM7-3 in their faecal samples. Escherichia coli was the main biliary pathogenic microorganism, among others such as Klebsiella spp., Clostridium perfringens, Citrobacter freundii and Enterobacter cloacae in the bile of the patients. Additionally, the amount of bile endotoxin significantly correlated with the number of Enterobacteriaceae, especially E. coli. Our data indicate that Enterobacteriaceae might play essential role in the pathogenesis and/or progress of AC. This was verified in an in vivo model using a pathogenic E. coli isolated from one of the patients in guinea pigs and observed marked gallbladder inflammation and morphologic changes. This study thus provides insight which could be useful for the prevention, diagnosis and treatment of AC and related diseases by controlling the growth of Enterobacteriaceae to alleviate the infection.
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Affiliation(s)
- J Liu
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - Q Yan
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China; Shenzhen Puensum Genetech Institution, Shenzhen, China
| | - F Luo
- Department of Acute Abdominal Surgery, Second Affiliated Hospital of Dalian Medical University, China
| | - D Shang
- Department of Acute Abdominal Surgery, First Affiliated Hospital of Dalian Medical University, China
| | - D Wu
- Department of Biotechnology, Dalian Medical University, Dalian, China
| | - H Zhang
- Department of Acute Abdominal Surgery, Second Affiliated Hospital of Dalian Medical University, China
| | - X Shang
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - X Kang
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - M Abdo
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - B Liu
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - Y Ma
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China.
| | - Y Xin
- Department of Biotechnology, Dalian Medical University, Dalian, China.
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Affhan S, Dachang W, Xin Y, Shang D. Lactic acid bacteria protect human intestinal epithelial cells from Staphylococcus aureus and Pseudomonas aeruginosa infections. Genet Mol Res 2015; 14:17044-58. [DOI: 10.4238/2015.december.16.5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Wang J, Li J, Wang W, Zhang Y, Ding Y, Liu T, Shang D. Detecting the Variations of the Spatial Position and Overlap Ratio for Primary Thoracic Esophageal Cancer Target During Radiation Therapy Based on Repeated 4-Dimensional CT Scans. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.08.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Sun Y, Dong W, Sun L, Ma L, Shang D. Insights into the membrane interaction mechanism and antibacterial properties of chensinin-1b. Biomaterials 2014; 37:299-311. [PMID: 25453959 DOI: 10.1016/j.biomaterials.2014.10.041] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [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: 08/24/2014] [Accepted: 10/02/2014] [Indexed: 11/29/2022]
Abstract
Antimicrobial peptides (AMPs) with non-specific membrane disrupting activities are thought to exert their antimicrobial activity as a result of their cationicity, hydrophobicity and α-helical or β-sheet structures. Chensinin-1, a native peptide from skin secretions of Rana chensinensis, fails to manifest its desired biological properties because its low hydrophobic nature and an adopted random coil structure in a membrane-mimetic environment. In this study, chensinin-1b was designed by rearranging the amino acid sequence of its hydrophilic/polar residues on one face and its hydrophobic/nonpolar residues on the opposite face according to its helical diagram, and by replacing three Gly residues with three Trp residues. Introduction of Trp residues significantly promoted the binding of the peptide to the bacterial outer membrane and exerted bactericidal activity through cytoplasmic membrane damage. Chensinin-1b demonstrates higher antimicrobial activity and greater cell selectivity than its parent peptide, chensinin-1. The electrostatic interactions between chensinin-1b and lipopolysaccharide (LPS) may have facilitated the uptake of the peptide into Gram-negative cells and be also helpful to disrupt the bacterial cytoplasmic membrane, as evidenced by depolarisation of the membrane potential and leakage of calceins from the liposomes of Escherichia coli and Staphylococcus aureus. Chensinin-1b was also found to penetrate mouse skin and was also effective in vivo, as measured by hydroxyproline levels in a wound infection mouse model, and could therefore act as an anti-infective agent for wound healing.
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Affiliation(s)
- Yue Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Weibing Dong
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China
| | - Li Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Lijie Ma
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
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Shang D, Liang H, Wei S, Yan X, Yang Q, Sun Y. Effects of antimicrobial peptide L-K6, a temporin-1CEb analog on oral pathogen growth, Streptococcus mutans biofilm formation, and anti-inflammatory activity. Appl Microbiol Biotechnol 2014; 98:8685-95. [PMID: 25056289 DOI: 10.1007/s00253-014-5927-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 06/16/2014] [Accepted: 07/01/2014] [Indexed: 10/25/2022]
Abstract
Dental caries and periodontitis are common bacterial mouth infections. As a potentially attractive substitute for conventional antibiotics, antimicrobial peptides have been widely tested and used for controlling bacterial infections. In this study, we tested the efficacy of the peptides from the skin secretions of Rana chensinensis for killing several major cariogenic and periodontic pathogens as well as Candida albicans. L-K6, a temporin-1CEb analog, exhibited high antimicrobial activity against the tested oral pathogens and was able to inhibit Streptococcus mutans biofilm formation and reduce 1-day-old S. mutans biofilms with a minimum biofilm inhibitory concentration and reducing concentration of 3.13 and 6.25 μM, respectively. The results of confocal laser scanning microscopy demonstrated that the peptide significantly reduced cell viability within oral biofilms. Furthermore, as little as 5 μM L-K6 significantly inhibited lipopolysaccharide (LPS)- and interleukin-1β-induced productions of interleukin-8 and tumor necrosis factor-α from THP-1 monocytic cells. This anti-inflammatory activity is associated with the binding of L-K6 to LPS and neutralizing LPS-induced proinflammatory responses in THP-1 cells, as well as dissociating LPS aggregates. Our results suggest that L-K6 may have potential clinical applications in treating dental caries by killing S. mutans within dental plaque and acting as anti-inflammatory agents in infected tissues.
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Affiliation(s)
- Dejing Shang
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, 116081, People's Republic of China,
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Guo Y, Li J, Wang W, Zhang Y, Wang J, Duan Y, Shang D, Fu Z. Geometrical differences in target volumes based on 18F-fluorodeoxyglucose positron emission tomography/computed tomography and four-dimensional computed tomography maximum intensity projection images of primary thoracic esophageal cancer. Dis Esophagus 2014; 27:744-50. [PMID: 24915760 DOI: 10.1111/dote.12247] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The objective of the study was to compare geometrical differences of target volumes based on four-dimensional computed tomography (4DCT) maximum intensity projection (MIP) and 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) images of primary thoracic esophageal cancer for radiation treatment. Twenty-one patients with thoracic esophageal cancer sequentially underwent contrast-enhanced three-dimensional computed tomography (3DCT), 4DCT, and 18F-FDG PET/CT thoracic simulation scans during normal free breathing. The internal gross target volume defined as IGTVMIP was obtained by contouring on MIP images. The gross target volumes based on PET/CT images (GTVPET ) were determined with nine different standardized uptake value (SUV) thresholds and manual contouring: SUV≥2.0, 2.5, 3.0, 3.5 (SUVn); ≥20%, 25%, 30%, 35%, 40% of the maximum (percentages of SUVmax, SUVn%). The differences in volume ratio (VR), conformity index (CI), and degree of inclusion (DI) between IGTVMIP and GTVPET were investigated. The mean centroid distance between GTVPET and IGTVMIP ranged from 4.98 mm to 6.53 mm. The VR ranged from 0.37 to 1.34, being significantly (P<0.05) closest to 1 at SUV2.5 (0.94), SUV20% (1.07), or manual contouring (1.10). The mean CI ranged from 0.34 to 0.58, being significantly closest to 1 (P<0.05) at SUV2.0 (0.55), SUV2.5 (0.56), SUV20% (0.56), SUV25% (0.53), or manual contouring (0.58). The mean DI of GTVPET in IGTVMIP ranged from 0.61 to 0.91, and the mean DI of IGTVMIP in GTVPET ranged from 0.34 to 0.86. The SUV threshold setting of SUV2.5, SUV20% or manual contouring yields the best tumor VR and CI with internal-gross target volume contoured on MIP of 4DCT dataset, but 3DPET/CT and 4DCT MIP could not replace each other for motion encompassing target volume delineation for radiation treatment.
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Affiliation(s)
- Y Guo
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, Shandong, China
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Bi X, Wang C, Dong W, Zhu W, Shang D. Antimicrobial properties and interaction of two Trp-substituted cationic antimicrobial peptides with a lipid bilayer. J Antibiot (Tokyo) 2014; 67:361-8. [DOI: 10.1038/ja.2014.4] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 12/14/2013] [Accepted: 01/07/2014] [Indexed: 01/06/2023]
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Li M, Shang D, Chen C, Kong L, Yu J. Pretreatment CT Perfusion Predicts Early Response of Advanced Esophageal Carcinoma Treated With Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wang W, Li J, Zhang Y, Li F, Xu M, Fan T, Shao Q, Shang D. Comparison of patient-specific internal gross tumor volume for radiation treatment of primary esophageal cancer based separately on three-dimensional and four-dimensional computed tomography images. Dis Esophagus 2013; 27:348-54. [PMID: 23796234 DOI: 10.1111/dote.12089] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
To compare the target volume, position and matching index of the patient-specific internal gross tumor volume (IGTV) based on three-dimensional (3D) and four-dimensional (4D) computed tomography (CT) images for primary esophageal cancer. Twenty-nine patients with primary thoracic esophageal cancer underwent 3DCT and 4DCT scans during free breathing. IGTVs were constructed using three approaches: combining the gross target volumes from the 10 respiratory phases of the 4DCT dataset to produce IGTV10 ; IGTV2 was acquired by combining the two extreme phases; and IGTV3D was created from the 3DCT-based gross target volume by enlarging the 95th percentile of motion in each direction measured by the 4DCT. 0.16 cm lateral (LR), 0.14 cm anteroposterior (AP) and 0.29 cm superoinferior (SI) in the upper; 0.18 cm LR, 0.10 cm AP and 0.63 cm SI in the middle; and 0.40 cm LR, 0.58 cm AP and 0.82 cm in the lower thoracic esophagus could account for 95% of respiratory-induced tumor motion. The centroid position shift between IGTV10 and IGTV2 was all below 0.10 cm, and less than 0.20 cm between IGTV10 and IGTV3D . IGTV10 was bigger than IGTV2 ; the mean value of matching index for IGTV2 to IGTV10 was 0.87 ± 0.05, 0.85 ± 0.06 and 0.83 ± 0.05 for upper, middle and distal thoracic esophageal tumors, respectively, and just 0.57 ± 0.11, 0.56 ± 0.13 and 0.40 ± 0.03 between IGTV3D and IGTV10 . 4DCT-based IGTV10 is a reasonable patient-specific IGTV for primary thoracic esophageal cancer, and IGTV2 is considered as an acceptable alternative to IGTV10 . However, it seems unreasonable to use IGTV3D substitute IGTV10 .
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Affiliation(s)
- W Wang
- Department of Radiation Oncology, Shandong Tumor Hospital, Jinan, Shandong, China
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Bi X, Wang C, Ma L, Sun Y, Shang D. Investigation of the role of tryptophan residues in cationic antimicrobial peptides to determine the mechanism of antimicrobial action. J Appl Microbiol 2013; 115:663-72. [PMID: 23710779 DOI: 10.1111/jam.12262] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [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: 02/18/2013] [Revised: 05/04/2013] [Accepted: 05/18/2013] [Indexed: 11/27/2022]
Abstract
AIMS To understand the effects of Trp residues in linear antimicrobial peptides with α-helical conformations on cell permeation ability and membrane transduction efficacy. METHODS AND RESULTS A series of L-K6 analogues were designed and synthesized by replacing Ile or Leu with Trp at different positions on the hydrophobic face of L-K6. The antimicrobial and haemolytic activity and secondary structure of the designed Trp-containing peptides were assessed. In addition, the role of Trp in membrane disruption for these designed peptides was investigated. I1W, I4W and L5W demonstrated stronger activity than the other peptides against both Gram-positive and Gram-negative bacteria. All of the tested peptides preferentially interacted with negatively charged vesicles composed of phosphatidylglycerol (PG)/cardiolipin (CL) or PG/CL/phosphatidylethanolamine, and, to a lesser extent, with zwitterionic vesicles. I1W, I4W and L5W caused calcein release at 2·5 μmol l(-1) . CONCLUSIONS The position of Trp, rather than the number of Trp residues, in these peptides was an important factor in the antimicrobial activity. Trp residues were deeply inserted into negatively charged membranes but were largely exposed in aqueous buffer solution. SIGNIFICANCE AND IMPACT OF THE STUDY These Trp-containing peptides may represent good candidates for new antibiotic agents and for use in new therapeutic approaches.
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Affiliation(s)
- X Bi
- Faculty of Life Science, Liaoning Normal University, Dalian, China
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Headley JV, Peru KM, Mohamed MH, Frank RA, Martin JW, Hazewinkel RRO, Humphries D, Gurprasad NP, Hewitt LM, Muir DCG, Lindeman D, Strub R, Young RF, Grewer DM, Whittal RM, Fedorak PM, Birkholz DA, Hindle R, Reisdorph R, Wang X, Kasperski KL, Hamilton C, Woudneh M, Wang G, Loescher B, Farwell A, Dixon DG, Ross M, Pereira ADS, King E, Barrow MP, Fahlman B, Bailey J, McMartin DW, Borchers CH, Ryan CH, Toor NS, Gillis HM, Zuin L, Bickerton G, Mcmaster M, Sverko E, Shang D, Wilson LD, Wrona FJ. Chemical fingerprinting of naphthenic acids and oil sands process waters-A review of analytical methods for environmental samples. J Environ Sci Health A Tox Hazard Subst Environ Eng 2013; 48:1145-1163. [PMID: 23647107 DOI: 10.1080/10934529.2013.776332] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This article provides a review of the routine methods currently utilized for total naphthenic acid analyses. There is a growing need to develop chemical methods that can selectively distinguish compounds found within industrially derived oil sands process affected waters (OSPW) from those derived from the natural weathering of oil sands deposits. Attention is thus given to the characterization of other OSPW components such as oil sands polar organic compounds, PAHs, and heavy metals along with characterization of chemical additives such as polyacrylamide polymers and trace levels of boron species. Environmental samples discussed cover the following matrices: OSPW containments, on-lease interceptor well systems, on- and off-lease groundwater, and river and lake surface waters. There are diverse ranges of methods available for analyses of total naphthenic acids. However, there is a need for inter-laboratory studies to compare their accuracy and precision for routine analyses. Recent advances in high- and medium-resolution mass spectrometry, concomitant with comprehensive mass spectrometry techniques following multi-dimensional chromatography or ion-mobility separations, have allowed for the speciation of monocarboxylic naphthenic acids along with a wide range of other species including humics. The distributions of oil sands polar organic compounds, particularly the sulphur containing species (i.e., OxS and OxS2) may allow for distinguishing sources of OSPW. The ratios of oxygen- (i.e., Ox) and nitrogen-containing species (i.e., NOx, and N2Ox) are useful for differentiating organic components derived from OSPW from natural components found within receiving waters. Synchronous fluorescence spectroscopy also provides a powerful screening technique capable of quickly detecting the presence of aromatic organic acids contained within oil sands naphthenic acid mixtures. Synchronous fluorescence spectroscopy provides diagnostic profiles for OSPW and potentially impacted groundwater that can be compared against reference groundwater and surface water samples. Novel applications of X-ray absorption near edge spectroscopy (XANES) are emerging for speciation of sulphur-containing species (both organic and inorganic components) as well as industrially derived boron-containing species. There is strong potential for an environmental forensics application of XANES for chemical fingerprinting of weathered sulphur-containing species and industrial additives in OSPW.
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Affiliation(s)
- J V Headley
- Water Science & Technology Directorate, Environment Canada, Saskatoon, Saskatchewan, Canada.
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Shang D, Sun Y, Wang C, Ma L, Li J, Wang X. Rational design of anti-microbial peptides with enhanced activity and low cytotoxicity based on the structure of the arginine/histidine-rich peptide, chensinin-1. J Appl Microbiol 2012; 113:677-85. [PMID: 22686707 DOI: 10.1111/j.1365-2672.2012.05355.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 05/12/2012] [Accepted: 05/18/2012] [Indexed: 11/29/2022]
Abstract
AIMS To understand the structure-activity relationship of chensinin-1, a anti-microbial peptide (AMP) with an unusual structure, and to develop novel AMPs as therapeutic agents. METHODS AND RESULTS A series of chensinin-1 analogues were designed and synthesized by one to three replacement of glycines with leucines at the hydrophilic face of chensinin-1 or rearrangement of some of the residues in its sequence. Circular dichroism spectroscopy showed that the analogues adopted α-helical-type conformations in 50% trifluoroethanol/water but adopted β-strand-type conformations in 30 mmol l(-1) sodium dodecyl sulphate. The anti-microbial activities of the peptides against Gram-positive bacteria increased 5- to 30-fold, and these increases paralleled the increases in the peptides' hydrophobicities. Their haemolytic activities also increased. Amphipathicities had little influence on the bactericidal activity of chensinin-1. All peptides caused leakage of calcein entrapped in negatively charged liposomes although with different efficiencies. The peptides did not induce leakage of calcein from uncharged liposomes. CONCLUSIONS Peptide adopted an aperiodic structure can improve the anti-microbial potency by increasing peptide hydrophobicity. Its target is bacteria plasma membrane. SIGNIFICANCE AND IMPACT OF THE STUDY Chensinin-1 can act as a new lead molecule for the study of AMPs with atypical structures.
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Affiliation(s)
- D Shang
- Faculty of Life Science, Liaoning Normal University, Dalian, China.
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Shang D, Sun Y, Wang C, Wei S, Ma L, Sun L. Membrane interaction and antibacterial properties of chensinin-1, an antimicrobial peptide with atypical structural features from the skin of Rana chensinensis. Appl Microbiol Biotechnol 2012; 96:1551-60. [DOI: 10.1007/s00253-012-4148-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Revised: 04/26/2012] [Accepted: 04/28/2012] [Indexed: 10/28/2022]
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Shang D, Li X, Sun Y, Wang C, Sun L, Wei S, Gou M. Design of potent, non-toxic antimicrobial agents based upon the structure of the frog skin peptide, temporin-1CEb from Chinese brown frog, Rana chensinensis. Chem Biol Drug Des 2012; 79:653-62. [PMID: 22348663 DOI: 10.1111/j.1747-0285.2012.01363.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Temporin-1CEb shows antimicrobial activity against Gram-positive bacteria, but its therapeutic potential is limited by its haemolysis. In this study, eight temporin-1CEb analogues with altered cationicities and hydrophobicities were synthesized. Increasing cationicity and amphipathicity by substituting neutral and non-polar amino acid residues on the hydrophilic face of the α-helix by five or six lysines increased antimicrobial potency approximately 10-fold to 40-fold, although when the number of positive charges was increased from +6 to +7, the antimicrobial potency was not additionally enhanced. The substitution of an l-lysine with a d-lysine, meanwhile maintaining the net charge and the mean hydrophobicity values, had only a minor effect on its antimicrobial activity, whereas significantly led a decrease in its haemolytic activity. Of all the peptides, l-K6 has the best potential as an antimicrobial agent because its antimicrobial activity against both Gram-positive and Gram-negative bacteria is substantial, and its haemolytic activity is negligible. l-K6 adopts an α-helix in 50% trifluoroethanol/water and 30 mm SDS solutions. l-K6 killed 99.9% of E. coli and S. aureus at 4× MIC in 60 min, and its postantibiotic effect was >5 h. l-K6 affects the integrity of E. coli and S. aureus plasma membranes by rapidly inducing membrane depolarization.
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Affiliation(s)
- Dejing Shang
- Faculty of Life Science, Liaoning Normal University, Dalian, China.
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Shang D, Li Y, Wang C, Wang X, Yu Z, Fu X. A novel polysaccharide from Se-enriched Ganoderma lucidum induces apoptosis of human breast cancer cells. Oncol Rep 2011; 25:267-272. [PMID: 21109986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
The novel polysaccharide SeGLP-2B-1 isolated from Se-enriched Ganoderma lucidum, showed anti-proliferative activity towards several cancer cell lines in vitro. To investigate the antitumor mechanisms, the apoptotic effects of SeGLP-2B-1 in human breast cancer cells were studied, and the mechanism of this action was further elucidated. Cell apoptosis was detected by Annexin V/PI staining. Caspase activity was assayed using a caspase apoptosis detection kit. Western blot analysis was used to evaluate the levels of pro-caspase-3, -8, -9, PARP and cytochrome c expression. The results showed that SeGLP-2B-1 inhibited the growth of MCF-7 cells in a time- and dose-dependent manner. Typical characteristics of apoptosis were observed, including morphological changes, sub-G1 cells and DNA ladder formation. Further analysis showed that SeGLP-2B-1 treatment disrupted the mitochondrial membrane potential followed by an increase in the cytochrome c cytosolic levels. Sequentially, SeGLP-2B-1 increased the activities of caspase-9, -3 and poly (ADP-ribose) polymerase in a time-dependent manner, however, no obvious activation of caspase-8 was observed. Caspase-9 and caspase-3 inhibitor prevented SeGLP-2B-1-induced apoptosis, and the activities of caspases-3, -9 were significantly up-regulated by SeGLP-2B-1. Our studies suggest that SeGLP-2B-1 induces apoptosis via a mitochondria-mediated pathway.
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Affiliation(s)
- Dejing Shang
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, College of Life Science, Liaoning Normal University, Dalian, P.R. China.
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Li M, Shang D, Li J, Du J, Yin Y, Yu J. The Use of 4D-CT for Determining the Internal Target Volume of Solitary Pulmonary Lesion. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Shang D, Li M, Li J, Yin Y, Du J, Yu J. Comparison of 4D-CT MIP Method with Axial CT Empirical Margin for the PTV of Solitary Pulmonary Lesion. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Shang D, Zhang J, Wen L, Li Y, Cui Q. Preparation, characterization, and antiproliferative activities of the Se-containing polysaccharide SeGLP-2B-1 from Se-enriched Ganoderma lucidum. J Agric Food Chem 2009; 57:7737-7742. [PMID: 19678686 DOI: 10.1021/jf9019344] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Inorganic selenite can be transformed into organic forms and bind to proteins and polysaccharides in Se-enriched submerged Ganoderma lucidum cultures. In the present study, a novel Se-containing polysaccharide, SeGLP-2B-1, was purified from the Se-enriched mycelia of G. lucidum and the antiproliferative activities against six human cancer cell lines were investigated. The Se content of SeGLP-2B-1 was 186.7 microg/g, which was 150-fold larger than that of the regular polysaccharide GLP-2B-1 (1.3 microg/g). SeGLP-2B-1 (1.06 x 10(6) Da) was composed of glucose, rhamnose, xylose, and galactose with a molar ratio of 1.000:0.652:0.443:0.227. SeGLP-2B-1 exhibited an approximately 10-fold stronger antiproliferative activity against six human cancer cell lines as compared to GLP-2B-1. Thus, Se is believed to play an important role in increasing the antiproliferative property of SeGLP-2B-1. These findings indicate that SeGLP-2B-1 may serve as a dietary Se supplement.
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Affiliation(s)
- Dejing Shang
- Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Faculty of Life Science, Liaoning Normal University, Dalian 116029, China.
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