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  1. AU=Shirtliff Mark E.
  2. AU="Riis, Kamilla R"
  3. AU="Xu, Leyao"
  4. AU="Udayakumar, Karthikrajan Parasuraman"
  5. AU="Fry, Brian"

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  1. Artikel ; Online: Effects of palm olein and palm stearin on cecal and fecal microbiota of C57BL/6J mice under low and high fat intakes.

    Wan, Liting / Li, Lin / Zhang, Xia / Li, Bing / Harro, Janette M / Shirtliff, Mark E

    Food chemistry

    2022  Band 404, Heft Pt B, Seite(n) 134693

    Abstract: This work aimed to study the effects of dietary lipid composition and content on cecal and fecal microbiota of mice fed the following diets for 8 weeks: palm olein (PO)-based low-fat diet, PO-based high-fat diet, palm stearin (PS)-based low-fat diet, and ...

    Abstract This work aimed to study the effects of dietary lipid composition and content on cecal and fecal microbiota of mice fed the following diets for 8 weeks: palm olein (PO)-based low-fat diet, PO-based high-fat diet, palm stearin (PS)-based low-fat diet, and PS-based high-fat diet. Increasing the dietary PS level favored the growth of Firmicutes over Bacteroidetes in the cecum and feces. In addition, it significantly elevated the total lipid (p < 0.01) and bile acid content (p < 0.01) in feces, resulting in the enrichment of fat-degrading and bile-acid tolerant genera within the families Ruminococcaceae and Lachnospiraceae. Although increasing the PO intake also caused obesity in mice, it did not affect the microbial structure. When fat intake is constant, only at a high-fat level can PS (vs PO) induce the above-mentioned microbial shifts. These results highlighted the combined roles of lipid quality and quantity on the gut microbiota.
    Mesh-Begriff(e) Mice ; Animals ; Mice, Inbred C57BL ; Dietary Fats/pharmacology ; Cecum ; Diet, High-Fat/adverse effects ; Microbiota ; Feces ; Bile Acids and Salts ; Palm Oil
    Chemische Substanzen Dietary Fats ; Bile Acids and Salts ; Palm Oil (5QUO05548Z)
    Sprache Englisch
    Erscheinungsdatum 2022-10-19
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2022.134693
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Inhibition of fracture healing in the presence of contamination by Staphylococcus aureus: Effects of growth state and immune response.

    Blanchette, Krystle A / Prabhakara, Ranjani / Shirtliff, Mark E / Wenke, Joseph C

    Journal of orthopaedic research : official publication of the Orthopaedic Research Society

    2017  Band 35, Heft 9, Seite(n) 1845–1854

    Abstract: Extremity injuries comprise a significant portion of trauma, affecting quality of life, financial burden, and return to duty. Bacterial contamination is commonly associated with failure to heal, despite antibiotic treatment, suggesting that additional ... ...

    Abstract Extremity injuries comprise a significant portion of trauma, affecting quality of life, financial burden, and return to duty. Bacterial contamination is commonly associated with failure to heal, despite antibiotic treatment, suggesting that additional therapies must be developed to combat these complications. Treatment failure is likely due to the presence of resistant microbial communities known as biofilms. Biofilm bacteria are able to elicit a direct inhibition of healing through a multitude of known factors. However, they likely also inhibit healing through alteration of the inflammatory response. As inflammation is a critical step in fracture healing, how the presence of biofilm bacteria shifts this response to one that is suboptimal for healing is an important consideration that is currently understudied. The profile of inflammatory factors in response to biofilm bacteria is unique and distinct from those induced during normal healing or by planktonic bacteria alone. This review will examine the presence of inflammatory factors during normal healing and those induced by contaminating bacteria, and will discuss how these differences may ultimately lead to nonunion. Specifically, this review will focus on the Th1/Th2/Th17 type inflammatory responses and how shifts in the balance of these responses during infection can lead to both ineffective clearance and disruption of fracture healing. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1845-1854, 2017.
    Mesh-Begriff(e) Biofilms ; Fracture Healing/immunology ; Humans ; Staphylococcal Infections/immunology ; Staphylococcal Infections/therapy ; Staphylococcus aureus/physiology ; Wounds and Injuries/complications
    Sprache Englisch
    Erscheinungsdatum 2017-09
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Review
    ZDB-ID 605542-4
    ISSN 1554-527X ; 0736-0266
    ISSN (online) 1554-527X
    ISSN 0736-0266
    DOI 10.1002/jor.23573
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Development of a Novel and Rapid Antibody-Based Diagnostic for Chronic Staphylococcus aureus Infections Based on Biofilm Antigens.

    Harro, Janette M / Shirtliff, Mark E / Arnold, William / Kofonow, Jennifer M / Dammling, Chad / Achermann, Yvonne / Brao, Kristen / Parvizi, Javad / Leid, Jeff G

    Journal of clinical microbiology

    2020  Band 58, Heft 5

    Abstract: Prosthetic joint infections are difficult to diagnose and treat due to biofilm formation by the causative pathogens. Pathogen identification relies on microbial culture that requires days to weeks, and in the case of chronic biofilm infections, lacks ... ...

    Abstract Prosthetic joint infections are difficult to diagnose and treat due to biofilm formation by the causative pathogens. Pathogen identification relies on microbial culture that requires days to weeks, and in the case of chronic biofilm infections, lacks sensitivity. Diagnosis of infection is often delayed past the point of effective treatment such that only the removal of the implant is curative. Early diagnosis of an infection based on antibody detection might lead to less invasive, early interventions. Our study examined antibody-based assays against the
    Mesh-Begriff(e) Animals ; Antigens, Bacterial ; Biofilms ; Osteomyelitis ; Rabbits ; Staphylococcal Infections/diagnosis ; Staphylococcus aureus
    Chemische Substanzen Antigens, Bacterial
    Sprache Englisch
    Erscheinungsdatum 2020-04-23
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 390499-4
    ISSN 1098-660X ; 0095-1137
    ISSN (online) 1098-660X
    ISSN 0095-1137
    DOI 10.1128/JCM.01414-19
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: The Arginine Deiminase Pathway Impacts Antibiotic Tolerance during Biofilm-Mediated Streptococcus pyogenes Infections.

    Freiberg, Jeffrey A / Le Breton, Yoann / Harro, Janette M / Allison, Devon L / McIver, Kevin S / Shirtliff, Mark E

    mBio

    2020  Band 11, Heft 4

    Abstract: Bacterial biofilms are responsible for a variety of serious human infections and are notoriously difficult to treat due to their recalcitrance to antibiotics. Further work is necessary to elicit a full understanding of the mechanism of this antibiotic ... ...

    Abstract Bacterial biofilms are responsible for a variety of serious human infections and are notoriously difficult to treat due to their recalcitrance to antibiotics. Further work is necessary to elicit a full understanding of the mechanism of this antibiotic tolerance. The arginine deiminase (ADI) pathway is responsible for bacterial pH maintenance and is highly expressed during biofilm growth in multiple bacterial species. Using the group A
    Mesh-Begriff(e) Animals ; Anti-Bacterial Agents/pharmacology ; Bacterial Proteins/metabolism ; Biofilms/drug effects ; Biofilms/growth & development ; Female ; Gene Expression Regulation, Bacterial ; Humans ; Hydrolases/metabolism ; Male ; Metabolic Networks and Pathways ; Mice, Inbred C57BL ; Streptococcus pyogenes/drug effects ; Streptococcus pyogenes/enzymology
    Chemische Substanzen Anti-Bacterial Agents ; Bacterial Proteins ; Hydrolases (EC 3.-) ; arginine deiminase (EC 3.5.3.6)
    Sprache Englisch
    Erscheinungsdatum 2020-07-07
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2557172-2
    ISSN 2150-7511 ; 2161-2129
    ISSN (online) 2150-7511
    ISSN 2161-2129
    DOI 10.1128/mBio.00919-20
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: Scnn1b

    Brao, Kristen J / Wille, Brendan P / Lieberman, Joshua / Ernst, Robert K / Shirtliff, Mark E / Harro, Janette M

    Infection and immunity

    2020  Band 88, Heft 9

    Abstract: The opportunistic ... ...

    Abstract The opportunistic pathogen
    Mesh-Begriff(e) Animals ; Bacterial Load ; Biofilms/growth & development ; Cystic Fibrosis/genetics ; Cystic Fibrosis/immunology ; Cystic Fibrosis/microbiology ; Cystic Fibrosis/pathology ; Disease Models, Animal ; Epithelial Sodium Channels/genetics ; Epithelial Sodium Channels/immunology ; Female ; Gene Expression Regulation ; Humans ; Interferon-gamma/genetics ; Interferon-gamma/immunology ; Interleukin-13/genetics ; Interleukin-13/immunology ; Interleukin-17/genetics ; Interleukin-17/immunology ; Interleukin-1beta/genetics ; Interleukin-1beta/immunology ; Interleukin-8/genetics ; Interleukin-8/immunology ; Interleukins/genetics ; Interleukins/immunology ; Ion Transport ; Lung/immunology ; Lung/microbiology ; Lung/pathology ; Mice ; Mice, Inbred BALB C ; Mice, Transgenic ; Opportunistic Infections/genetics ; Opportunistic Infections/immunology ; Opportunistic Infections/microbiology ; Opportunistic Infections/pathology ; Plankton/growth & development ; Plankton/immunology ; Plankton/pathogenicity ; Pseudomonas Infections/genetics ; Pseudomonas Infections/immunology ; Pseudomonas Infections/pathology ; Pseudomonas aeruginosa/growth & development ; Pseudomonas aeruginosa/immunology ; Pseudomonas aeruginosa/pathogenicity ; Sodium/metabolism ; Interleukin-22
    Chemische Substanzen Epithelial Sodium Channels ; IFNG protein, mouse ; IL1B protein, mouse ; Il17a protein, mouse ; Interleukin-13 ; Interleukin-17 ; Interleukin-1beta ; Interleukin-8 ; Interleukins ; Scnn1b protein, mouse ; Interferon-gamma (82115-62-6) ; Sodium (9NEZ333N27)
    Sprache Englisch
    Erscheinungsdatum 2020-08-19
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 218698-6
    ISSN 1098-5522 ; 0019-9567
    ISSN (online) 1098-5522
    ISSN 0019-9567
    DOI 10.1128/IAI.00237-20
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel ; Online: In Vitro Gastrointestinal Digestion of Palm Olein and Palm Stearin-in-Water Emulsions with Different Physical States and Fat Contents.

    Wan, Liting / Li, Lin / Harro, Janette M / Hoag, Stephen W / Li, Bing / Zhang, Xia / Shirtliff, Mark E

    Journal of agricultural and food chemistry

    2020  Band 68, Heft 26, Seite(n) 7062–7071

    Abstract: The impacts of lipid physical state and content on lipid digestion behavior were investigated using 4 and 20% palm olein-in-water emulsions (4% PO and 20% PO) and 4 and 20% palm stearin-in-water emulsions (4% PS and 20% PS). The changes of lipid physical ...

    Abstract The impacts of lipid physical state and content on lipid digestion behavior were investigated using 4 and 20% palm olein-in-water emulsions (4% PO and 20% PO) and 4 and 20% palm stearin-in-water emulsions (4% PS and 20% PS). The changes of lipid physical state, particle size, and microstructure during gastrointestinal digestion; the free fatty acid (FFA) released in the intestinal phase; and the fatty acid composition of micellar phases were investigated. After gastric digestion, all emulsions underwent flocculation and coalescence, with 20% PS showing the most extensive aggregation. During intestinal digestion, the FFA release rate and level decreased as the lipid content increased from 4 to 20%, with 4% PO presenting the highest digestion rate and extent. Besides, the solid fat in 4% PS and 20% PS decreased and increased the maximum lipid digestibility, respectively. These results highlighted the combined roles of lipid physical state and content in modulating dietary lipid digestion.
    Mesh-Begriff(e) Digestion ; Emulsions/chemistry ; Emulsions/metabolism ; Fatty Acids, Nonesterified/chemistry ; Fatty Acids, Nonesterified/metabolism ; Humans ; Intestinal Mucosa/metabolism ; Palm Oil/chemistry ; Palm Oil/metabolism ; Particle Size ; Water/chemistry
    Chemische Substanzen Emulsions ; Fatty Acids, Nonesterified ; Water (059QF0KO0R) ; Palm Oil (5QUO05548Z)
    Sprache Englisch
    Erscheinungsdatum 2020-06-17
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 241619-0
    ISSN 1520-5118 ; 0021-8561
    ISSN (online) 1520-5118
    ISSN 0021-8561
    DOI 10.1021/acs.jafc.0c00212
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: The Host Immune System Facilitates Disseminated Staphylococcus aureus Disease Due to Phagocytic Attraction to Candida albicans during Coinfection: a Case of Bait and Switch.

    Allison, Devon L / Scheres, Nina / Willems, Hubertine M E / Bode, Carolien S / Krom, Bastiaan P / Shirtliff, Mark E

    Infection and immunity

    2019  Band 87, Heft 11

    Abstract: ... ...

    Abstract Invasive
    Mesh-Begriff(e) Animals ; Candida albicans ; Candidiasis/immunology ; Candidiasis/microbiology ; Cell Line ; Coinfection ; Immunity, Innate ; Macrophages/physiology ; Mice ; Phagocytosis ; Staphylococcal Infections/immunology ; Staphylococcal Infections/microbiology ; Staphylococcus aureus
    Sprache Englisch
    Erscheinungsdatum 2019-10-18
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 218698-6
    ISSN 1098-5522 ; 0019-9567
    ISSN (online) 1098-5522
    ISSN 0019-9567
    DOI 10.1128/IAI.00137-19
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Proteus mirabilis biofilms and catheter-associated urinary tract infections.

    Jacobsen, Sandra M / Shirtliff, Mark E

    Virulence

    2011  Band 2, Heft 5, Seite(n) 460–465

    Abstract: Proteus mirabilis inhabits the environment and causes a number of infections including those of the skin, respiratory tract, wounds and urinary tract. These organisms express virulence factors associated with adhesion, motility, immunoavoidance, nutrient ...

    Abstract Proteus mirabilis inhabits the environment and causes a number of infections including those of the skin, respiratory tract, wounds and urinary tract. These organisms express virulence factors associated with adhesion, motility, immunoavoidance, nutrient acquisition, host damage, as well as biofilm formation. P. mirabilis produces biofilms in diverse habitats with those formed in the human host playing a key role in indwelling device infections. The most studied P. mirabilis biofilms are those formed when the organism is grown in urine, resulting in unique features including the presence of swarmer cells and struvite and hydroxyapatite crystals upon growth in urine. Factors relevant to P. mirabilis biofilm formation include adhesion factors, proteins involved in LPS production, transporters, transcription factors, two component systems, communication factors and enzymes. P. mirabilis biofilm research will lead to a better understanding of the disease process and will subsequently lead to the development of new prevention, and treatment options.
    Mesh-Begriff(e) Adhesins, Bacterial/metabolism ; Biofilms ; Catheter-Related Infections/microbiology ; Catheters/microbiology ; Crystallization ; Durapatite/metabolism ; Humans ; Proteus Infections/microbiology ; Proteus mirabilis/growth & development ; Proteus mirabilis/pathogenicity ; Urinary Tract Infections/microbiology ; Urine/chemistry ; Urine/microbiology ; Virulence Factors/metabolism
    Chemische Substanzen Adhesins, Bacterial ; Virulence Factors ; Durapatite (91D9GV0Z28)
    Sprache Englisch
    Erscheinungsdatum 2011-09-01
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Review
    ZDB-ID 2657572-3
    ISSN 2150-5608 ; 2150-5594
    ISSN (online) 2150-5608
    ISSN 2150-5594
    DOI 10.4161/viru.2.5.17783
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel ; Online: Predictive Computer Models for Biofilm Detachment Properties in Pseudomonas aeruginosa.

    Cogan, Nick G / Harro, Janette M / Stoodley, Paul / Shirtliff, Mark E

    mBio

    2016  Band 7, Heft 3

    Abstract: ... article by Kragh et al. (K. N. Kragh, J. B. Hutchison, G. Melaugh, C. Rodesney, A. E. Roberts, Y. Irie, P ...

    Abstract Microbial biofilm communities are protected against environmental extremes or clearance by antimicrobial agents or the host immune response. They also serve as a site from which microbial populations search for new niches by dispersion via single planktonic cells or by detachment by protected biofilm aggregates that, until recently, were thought to become single cells ready for attachment. Mathematically modeling these events has provided investigators with testable hypotheses for further study. Such was the case in the recent article by Kragh et al. (K. N. Kragh, J. B. Hutchison, G. Melaugh, C. Rodesney, A. E. Roberts, Y. Irie, P. Ø. Jensen, S. P. Diggle, R. J. Allen, V. Gordon, and T. Bjarnsholt, mBio 7:e00237-16, 2016, http://dx.doi.org/10.1128/mBio.00237-16), in which investigators were able to identify the differential competitive advantage of biofilm aggregates to directly attach to surfaces compared to the single-celled planktonic populations. Therefore, as we delve deeper into the properties of the biofilm mode of growth, not only do we need to understand the complexity of biofilms, but we must also account for the properties of the dispersed and detached populations and their effect on reseeding.
    Mesh-Begriff(e) Biofilms ; Plankton ; Pseudomonas aeruginosa
    Sprache Englisch
    Erscheinungsdatum 2016-06-14
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Comment
    ZDB-ID 2557172-2
    ISSN 2150-7511 ; 2161-2129
    ISSN (online) 2150-7511
    ISSN 2161-2129
    DOI 10.1128/mBio.00815-16
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel ; Online: Poor biofilm-forming ability and long-term survival of invasive Salmonella Typhimurium ST313.

    Ramachandran, Girish / Aheto, Komi / Shirtliff, Mark E / Tennant, Sharon M

    Pathogens and disease

    2016  Band 74, Heft 5

    Abstract: Salmonella enterica serovar Typhimurium, an enteric pathogen that causes a self-limiting gastroenteritis, forms biofilms on different surfaces. In sub-Saharan Africa, Salmonella Typhimurium of a novel sequence type (ST) 313 was identified and produces ... ...

    Abstract Salmonella enterica serovar Typhimurium, an enteric pathogen that causes a self-limiting gastroenteritis, forms biofilms on different surfaces. In sub-Saharan Africa, Salmonella Typhimurium of a novel sequence type (ST) 313 was identified and produces septicemia in the absence of gastroenteritis. No animal reservoir has been identified, and it is hypothesized that transmission occurs via human to human. In this study, we show that invasive Salmonella Typhimurium ST313 strains from Mali are poor biofilm producers compared to Salmonella Typhimurium ST19 strains, which are found worldwide and are known to be associated with gastroenteritis. We evaluated biofilms using crystal violet staining, examination of the red, dry and rough morphotype, pellicle formation and a continuous flow system. One month-old Salmonella Typhimurium ST19 colonies survived in the absence of exogenous nutrients and were highly resistant to sodium hypochlorite treatment compared to Salmonella Typhimurium ST313. This study for the first time demonstrates the comparative biofilm-forming ability and long-term survival of clinical Salmonella Typhimurium ST19 and ST313 isolates. Salmonella Typhimurium ST19 strains are strong biofilm producers and can survive desiccation compared to Salmonella Typhimurium ST313 that form weak biofilms and survive poorly following desiccation. Our data suggest that like Salmonella Typhi, Salmonella Typhimurium ST313 lack mechanisms that allow it to persist in the environment.
    Mesh-Begriff(e) Biofilms/drug effects ; Biofilms/growth & development ; Disinfectants/pharmacology ; Microbial Viability ; Phenotype ; Salmonella Infections/microbiology ; Salmonella typhimurium/classification ; Salmonella typhimurium/drug effects ; Salmonella typhimurium/physiology ; Sodium Hypochlorite/pharmacology
    Chemische Substanzen Disinfectants ; Sodium Hypochlorite (DY38VHM5OD)
    Sprache Englisch
    Erscheinungsdatum 2016
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, N.I.H., Extramural
    ISSN 2049-632X
    ISSN (online) 2049-632X
    DOI 10.1093/femspd/ftw049
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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