LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 563

Search options

  1. Article: Effects of Ceragenins and Antimicrobial Peptides on the A549 Cell Line and an In Vitro Co-Culture Model of A549 Cells and

    Oyardi, Ozlem / Savage, Paul B / Guzel, Cagla Bozkurt

    Pathogens (Basel, Switzerland)

    2022  Volume 11, Issue 9

    Abstract: Pseudomonas ... ...

    Abstract Pseudomonas aeruginosa
    Language English
    Publishing date 2022-09-14
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2695572-6
    ISSN 2076-0817
    ISSN 2076-0817
    DOI 10.3390/pathogens11091044
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Efficacy of Ceragenins Alone and in Combinations with Antibiotics Against Multidrug-Resistant Gram Negative Pathogens from Bloodstream Infections.

    Yilmaz, Fatima Nur / Öksüz, Lütfiye / Demir, Elif Sena / Döşler, Sibel / Savage, Paul B / Güzel, Çağla Bozkurt

    Current microbiology

    2023  Volume 80, Issue 10, Page(s) 327

    Abstract: Ceragenins (CSAs) that mimic the activities of antimicrobial peptides may be new options for the treatment of infections caused by multidrug-resistant pathogens. This study investigated the antibacterial activities of eight different ceragenins against ... ...

    Abstract Ceragenins (CSAs) that mimic the activities of antimicrobial peptides may be new options for the treatment of infections caused by multidrug-resistant pathogens. This study investigated the antibacterial activities of eight different ceragenins against MDR pathogens and the synergistic effects of some ceragenins in combinations with antibiotics (meropenem-MEM, ceftazidime + avibactam-CZA, tigecycline-TIG). A disc diffusion method was used for antibiotic susceptibility tests, a broth microdilution, and checkerboard methods were used to detect minimum inhibitory concentrations (MICs) and the effects of combinations, respectively. While MIC
    MeSH term(s) Humans ; Anti-Bacterial Agents/pharmacology ; Escherichia coli ; Sepsis ; Meropenem ; Pseudomonas aeruginosa
    Chemical Substances Anti-Bacterial Agents ; ceragenins ; Meropenem (FV9J3JU8B1)
    Language English
    Publishing date 2023-08-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 134238-1
    ISSN 1432-0991 ; 0343-8651
    ISSN (online) 1432-0991
    ISSN 0343-8651
    DOI 10.1007/s00284-023-03443-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Glyoxylate Shunt and Pyruvate-to-Acetoin Shift Are Specific Stress Responses Induced by Colistin and Ceragenin CSA-13 in Enterobacter hormaechei ST89.

    Prasad, Suhanya V / Fiedoruk, Krzysztof / Zakrzewska, Magdalena / Savage, Paul B / Bucki, Robert

    Microbiology spectrum

    2023  Volume 11, Issue 4, Page(s) e0121523

    Abstract: Ceragenins, including CSA-13, are cationic antimicrobials that target the bacterial cell envelope differently than colistin. However, the molecular basis of their action is not fully understood. Here, we examined the genomic and transcriptome responses ... ...

    Abstract Ceragenins, including CSA-13, are cationic antimicrobials that target the bacterial cell envelope differently than colistin. However, the molecular basis of their action is not fully understood. Here, we examined the genomic and transcriptome responses by Enterobacter hormaechei after prolonged exposure to either CSA-13 or colistin. Resistance of the
    MeSH term(s) Colistin/pharmacology ; Anti-Bacterial Agents/pharmacology ; Acetoin ; Pyruvic Acid ; Drug Resistance, Bacterial/genetics ; Anti-Infective Agents/pharmacology ; Glyoxylates ; Microbial Sensitivity Tests ; Bacterial Proteins/genetics
    Chemical Substances Colistin (Z67X93HJG1) ; Anti-Bacterial Agents ; ceragenin CSA-13 ; Acetoin (BG4D34CO2H) ; Pyruvic Acid (8558G7RUTR) ; Anti-Infective Agents ; Glyoxylates ; Bacterial Proteins
    Language English
    Publishing date 2023-06-20
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2807133-5
    ISSN 2165-0497 ; 2165-0497
    ISSN (online) 2165-0497
    ISSN 2165-0497
    DOI 10.1128/spectrum.01215-23
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: The Use of Social Media to Express and Manage Medical Uncertainty in Dyskeratosis Congenita: Content Analysis.

    Pearce, Emily / Raj, Hannah / Emezienna, Ngozika / Gilkey, Melissa B / Lazard, Allison J / Ribisl, Kurt M / Savage, Sharon A / Han, Paul Kj

    JMIR infodemiology

    2024  Volume 4, Page(s) e46693

    Abstract: Background: Social media has the potential to provide social support for rare disease communities; however, little is known about the use of social media for the expression of medical uncertainty, a common feature of rare diseases.: Objective: This ... ...

    Abstract Background: Social media has the potential to provide social support for rare disease communities; however, little is known about the use of social media for the expression of medical uncertainty, a common feature of rare diseases.
    Objective: This study aims to evaluate the expression of medical uncertainty on social media in the context of dyskeratosis congenita, a rare cancer-prone inherited bone marrow failure and telomere biology disorder (TBD).
    Methods: We performed a content analysis of uncertainty-related posts on Facebook and Twitter managed by Team Telomere, a patient advocacy group for this rare disease. We assessed the frequency of uncertainty-related posts, uncertainty sources, issues, and management and associations between uncertainty and social support.
    Results: Across all TBD social media platforms, 45.98% (1269/2760) of posts were uncertainty related. Uncertainty-related posts authored by Team Telomere on Twitter focused on scientific (306/434, 70.5%) or personal (230/434, 53%) issues and reflected uncertainty arising from probability, ambiguity, or complexity. Uncertainty-related posts in conversations among patients and caregivers in the Facebook community group focused on scientific (429/511, 84%), personal (157/511, 30.7%), and practical (114/511, 22.3%) issues, many of which were related to prognostic unknowns. Both platforms suggested uncertainty management strategies that focused on information sharing and community building. Posts reflecting response-focused uncertainty management strategies (eg, emotional regulation) were more frequent on Twitter compared with the Facebook community group (χ
    Conclusions: Although uncertainty is a pervasive and multifactorial issue in TBDs, our findings suggest that the discussion of medical uncertainty on TBD social media is largely limited to brief exchanges about scientific, personal, or practical issues rather than ongoing supportive conversation. The nature of uncertainty-related conversations also varied by user group: patients and caregivers used social media primarily to discuss scientific uncertainties (eg, regarding prognosis), form social connections, or exchange advice on accessing and organizing medical care, whereas Team Telomere used social media to express scientific and personal issues of uncertainty and to address the emotional impact of uncertainty. The higher involvement of female parents on TBD social media suggests a potentially greater burden of uncertainty management among mothers compared with other groups. Further research is needed to understand the dynamics of social media engagement to manage medical uncertainty in the TBD community.
    MeSH term(s) Humans ; Female ; Uncertainty ; Social Media ; Dyskeratosis Congenita/genetics ; Rare Diseases ; Probability
    Language English
    Publishing date 2024-01-15
    Publishing country Canada
    Document type Journal Article
    ISSN 2564-1891
    ISSN (online) 2564-1891
    DOI 10.2196/46693
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Ceragenin-mediated disruption of Pseudomonas aeruginosa biofilms.

    Wnorowska, Urszula / Łysik, Dawid / Piktel, Ewelina / Zakrzewska, Magdalena / Okła, Sławomir / Lesiak, Agata / Spałek, Jakub / Mystkowska, Joanna / Savage, Paul B / Janmey, Paul / Fiedoruk, Krzysztof / Bucki, Robert

    PloS one

    2024  Volume 19, Issue 2, Page(s) e0298112

    Abstract: Background: Microbial biofilms, as a hallmark of cystic fibrosis (CF) lung disease and other chronic infections, remain a desirable target for antimicrobial therapy. These biopolymer-based viscoelastic structures protect pathogenic organisms from immune ...

    Abstract Background: Microbial biofilms, as a hallmark of cystic fibrosis (CF) lung disease and other chronic infections, remain a desirable target for antimicrobial therapy. These biopolymer-based viscoelastic structures protect pathogenic organisms from immune responses and antibiotics. Consequently, treatments directed at disrupting biofilms represent a promising strategy for combating biofilm-associated infections. In CF patients, the viscoelasticity of biofilms is determined mainly by their polymicrobial nature and species-specific traits, such as Pseudomonas aeruginosa filamentous (Pf) bacteriophages. Therefore, we examined the impact of microbicidal ceragenins (CSAs) supported by mucolytic agents-DNase I and poly-aspartic acid (pASP), on the viability and viscoelasticity of mono- and bispecies biofilms formed by Pf-positive and Pf-negative P. aeruginosa strains co-cultured with Staphylococcus aureus or Candida albicans.
    Methods: The in vitro antimicrobial activity of ceragenins against P. aeruginosa in mono- and dual-species cultures was assessed by determining minimum inhibitory concentration (MIC) and minimum bactericidal/fungicidal concentration (MBC/MFC). Inhibition of P. aeruginosa mono- and dual-species biofilms formation by ceragenins alone and in combination with DNase I or poly-aspartic acid (pASP) was estimated by the crystal violet assay. Additionally, the viability of the biofilms was measured by colony-forming unit (CFU) counting. Finally, the biofilms' viscoelastic properties characterized by shear storage (G') and loss moduli (G"), were analyzed with a rotational rheometer.
    Results: Our results demonstrated that ceragenin CSA-13 inhibits biofilm formation and increases its fluidity regardless of the Pf-profile and species composition; however, the Pf-positive biofilms are characterized by elevated viscosity and elasticity parameters.
    Conclusion: Due to its microbicidal and viscoelasticity-modifying properties, CSA-13 displays therapeutic potential in biofilm-associated infections, especially when combined with mucolytic agents.
    MeSH term(s) Humans ; Pseudomonas aeruginosa ; Aspartic Acid ; Expectorants ; Anti-Bacterial Agents/pharmacology ; Anti-Infective Agents/pharmacology ; Biofilms ; Cystic Fibrosis ; Deoxyribonuclease I ; Microbial Sensitivity Tests ; Pseudomonas Infections ; Steroids
    Chemical Substances ceragenins ; Aspartic Acid (30KYC7MIAI) ; Expectorants ; Anti-Bacterial Agents ; Anti-Infective Agents ; Deoxyribonuclease I (EC 3.1.21.1) ; Steroids
    Language English
    Publishing date 2024-02-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0298112
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Vaccine development: NKT-cell adjuvants in conjugate.

    Savage, Paul B

    Nature chemical biology

    2014  Volume 10, Issue 11, Page(s) 882–883

    MeSH term(s) Adjuvants, Immunologic ; Carbohydrates/chemistry ; Carbohydrates/immunology ; Epitopes/chemistry ; Epitopes/immunology ; Humans ; Molecular Conformation ; Natural Killer T-Cells/immunology ; Peptides/chemistry ; Peptides/immunology ; Vaccines/chemistry ; Vaccines/immunology
    Chemical Substances Adjuvants, Immunologic ; Carbohydrates ; Epitopes ; Peptides ; Vaccines
    Language English
    Publishing date 2014-10-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2202962-X
    ISSN 1552-4469 ; 1552-4450
    ISSN (online) 1552-4469
    ISSN 1552-4450
    DOI 10.1038/nchembio.1667
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article: Antimicrobial Activity of Ceragenins against Vancomycin-Susceptible and -Resistant

    Hacioglu, Mayram / Yilmaz, Fatima Nur / Oyardi, Ozlem / Bozkurt Guzel, Cagla / Inan, Nese / Savage, Paul B / Dosler, Sibel

    Pharmaceuticals (Basel, Switzerland)

    2023  Volume 16, Issue 12

    Abstract: Ceragenins (CSAs) are a new class of antimicrobial agents designed to mimic the activities of endogenous antimicrobial peptides. In this study, the antibacterial activities of various ceragenins (CSA-13, CSA-44, CSA-90, CSA-131, CSA-138, CSA-142, and CSA- ...

    Abstract Ceragenins (CSAs) are a new class of antimicrobial agents designed to mimic the activities of endogenous antimicrobial peptides. In this study, the antibacterial activities of various ceragenins (CSA-13, CSA-44, CSA-90, CSA-131, CSA-138, CSA-142, and CSA-192), linezolid, and daptomycin were assessed against 50 non-repeated
    Language English
    Publishing date 2023-11-23
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2193542-7
    ISSN 1424-8247
    ISSN 1424-8247
    DOI 10.3390/ph16121643
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article: Effects of Ceragenins and Antimicrobial Peptides on the A549 Cell Line and an In Vitro Co-Culture Model of A549 Cells and Pseudomonas aeruginosa

    Oyardi, Ozlem / Savage, Paul B. / Guzel, Cagla Bozkurt

    Pathogens. 2022 Sept. 14, v. 11, no. 9

    2022  

    Abstract: Pseudomonas aeruginosa is an important pathogen that can adhere to host tissues and epithelial surfaces, especially during chronic infections such as cystic fibrosis (CF) lung infections. The effect of ceragenins and antimicrobial peptides (AMP) on this ... ...

    Abstract Pseudomonas aeruginosa is an important pathogen that can adhere to host tissues and epithelial surfaces, especially during chronic infections such as cystic fibrosis (CF) lung infections. The effect of ceragenins and antimicrobial peptides (AMP) on this colonization was investigated in a co-culture infection model. After determining the antimicrobial effects of the substances on P. aeruginosa planktonic cells, their cytotoxicity on the A549 cell line was also determined. After the A549 cell line was infected with P. aeruginosa, the effect of antimicrobials on intracellular bacteria as well as the effects in inhibiting the adhesion of P. aeruginosa were investigated. In addition, LDH release from cells was determined by performing an LDH experiment to understand the cytotoxicity of bacterial infection and antimicrobial treatment on cells. CSA-131 was determined as the antimicrobial agent with the highest antimicrobial activity, while the antimicrobial effects of AMPs were found to be much lower than those of ceragenins. The antimicrobial with the lowest IC₅₀ value was determined as the combination of CSA-131 with Pluronic F127. CSA-13 has been determined to be the most effective antimicrobial with its effectiveness to both intracellular bacteria and bacterial adhesion. Nevertheless, further safety, efficacy, toxicity, and pharmacological studies of ceragenins are needed to evaluate clinical utility.
    Keywords Pseudomonas aeruginosa ; adhesion ; anti-infective agents ; antimicrobial peptides ; antimicrobial properties ; bacterial adhesion ; bacterial infections ; cell lines ; coculture ; cystic fibrosis ; cytotoxicity ; epithelium ; lungs ; models ; pathogens ; plankton
    Language English
    Dates of publication 2022-0914
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2695572-6
    ISSN 2076-0817
    ISSN 2076-0817
    DOI 10.3390/pathogens11091044
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  9. Article ; Online: Pandemic coping and COVID-19 preventive behaviors among cancer survivors.

    Guidry, Jeanine P D / Miller, Carrie A / Perrin, Paul B / Carlyle, Kellie E / Savage, Matthew W / Sheppard, Vanessa B / Fuemmeler, Bernard F

    Patient education and counseling

    2023  Volume 112, Page(s) 107716

    Abstract: Background: Cancer survivors are at greater risk for COVID-19 complications, emphasizing the importance of adherence to COVID-19 prevention. Active coping mechanisms can help manage pandemic stress but disengaged coping practices can have adverse ... ...

    Abstract Background: Cancer survivors are at greater risk for COVID-19 complications, emphasizing the importance of adherence to COVID-19 prevention. Active coping mechanisms can help manage pandemic stress but disengaged coping practices can have adverse effects.
    Objectives: 1) Identify differences in COVID-19 coping styles and COVID-19 preventive behaviors among cancer survivors in active treatment, survivors not in treatment, and a comparison group without a cancer history. 2) Exploring variables that may predict adherence to COVID-19 preventative behaviors.
    Patient involvement & methods: This study used an online survey among two categories of cancer survivors - one group in active treatment and one group no longer in treatment - and one group without a cancer history (N = 897 total).
    Results and discussion: Cancer survivors in treatment were more likely to utilize both active and disengaged coping (p < .001). This could indicate that the additional COVID-19 strain is making survivors more likely to engage in coping in any way possible. Cancer survivors not in treatment were less likely to report intent to carry out COVID- 19 preventative behaviors compared to the comparison group (p = .009). Providers should understand how survivors may use both coping mechanism types because these coping strategies predict both depression and adherence to COVID-19 preventive behaviors.
    MeSH term(s) Humans ; COVID-19/epidemiology ; COVID-19/prevention & control ; Cancer Survivors ; Pandemics/prevention & control ; Adaptation, Psychological ; Survivors ; Neoplasms
    Language English
    Publishing date 2023-03-23
    Publishing country Ireland
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 605590-4
    ISSN 1873-5134 ; 0738-3991
    ISSN (online) 1873-5134
    ISSN 0738-3991
    DOI 10.1016/j.pec.2023.107716
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: Antimicrobial Growth Promoters Altered the Function but Not the Structure of Enteric Bacterial Communities in Broiler Chicks ± Microbiota Transplantation.

    Hodak, Colten R / Bescucci, Danisa M / Shamash, Karen / Kelly, Laisa C / Montina, Tony / Savage, Paul B / Inglis, G Douglas

    Animals : an open access journal from MDPI

    2023  Volume 13, Issue 6

    Abstract: Non-antibiotic alternatives to antimicrobial growth promoters (AGPs) are required, and understanding the mode of action of AGPs may facilitate the development of effective alternatives. The temporal impact of the conventional antibiotic AGP, ... ...

    Abstract Non-antibiotic alternatives to antimicrobial growth promoters (AGPs) are required, and understanding the mode of action of AGPs may facilitate the development of effective alternatives. The temporal impact of the conventional antibiotic AGP, virginiamycin, and an AGP alternative, ceragenin (CSA-44), on the structure and function of the broiler chicken cecal microbiota was determined using next-generation sequencing and
    Language English
    Publishing date 2023-03-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2606558-7
    ISSN 2076-2615
    ISSN 2076-2615
    DOI 10.3390/ani13060997
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top