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  1. AU="Dedon, Liv R"
  2. AU="Kasperkiewicz, M"
  3. AU="Yennurajalingam, Sriram"
  4. AU="Bahamdain, Foud"
  5. AU="Toyoma, Yuriko"
  6. AU="Basnett, Pooja"
  7. AU="Perrine-Walker, Francine"
  8. AU="Lang, Haojie"
  9. AU="Ling, Wai-Man"
  10. AU=Houck J C AU=Houck J C
  11. AU="Flood, Grace E"
  12. AU="Nandi, Suvobroto"

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  1. Artikel: Baseline gut microbiome and metabolites are correlated with alcohol consumption in a zonisamide clinical trial of heavy drinking alcoholic civilians.

    Dedon, Liv R / Yuan, Hanshu / Chi, Jinhua / Gu, Haiwei / Arias, Albert J / Covault, Jonathan M / Zhou, Yanjiao

    medRxiv : the preprint server for health sciences

    2024  

    Abstract: Development and severity of alcohol use disorder (AUD) has been linked to variations in gut microbiota and their associated metabolites in both animal and human studies. However, the involvement of the gut microbiome in alcohol consumption of individuals ...

    Abstract Development and severity of alcohol use disorder (AUD) has been linked to variations in gut microbiota and their associated metabolites in both animal and human studies. However, the involvement of the gut microbiome in alcohol consumption of individuals with AUD undergoing treatment remains unclear. To address this, stool samples (n=48) were collected at screening (baseline) and trial completion from a single site of a multi-site double-blind, placebo-controlled trial of Zonisamide in individuals with AUD. Alcohol consumption, gamma-glutamyl transferase (GGT), and phosphatidylethanol (PEth)levels were measured both at baseline and endpoint of 16-week trial period. Fecal microbiome was analyzed
    Sprache Englisch
    Erscheinungsdatum 2024-04-03
    Erscheinungsland United States
    Dokumenttyp Preprint
    DOI 10.1101/2024.04.02.24305199
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Fucosylated Human Milk Oligosaccharides Drive Structure-Specific Syntrophy between Bifidobacterium infantis and Eubacterium hallii within a Modeled Infant Gut Microbiome.

    Dedon, Liv R / Hilliard, Margaret A / Rani, Asha / Daza-Merchan, Zunny Tatiana / Story, Galaxie / Briere, Carrie-Ellen / Sela, David A

    Molecular nutrition & food research

    2023  Band 67, Heft 11, Seite(n) e2200851

    Abstract: Scope: Fucosylated human milk oligosaccharides (fHMOs) are metabolized by Bifidobacterium infantis and promote syntrophic interactions between microbiota that colonize the infant gut. The role of fHMO structure on syntrophic interactions and net ... ...

    Abstract Scope: Fucosylated human milk oligosaccharides (fHMOs) are metabolized by Bifidobacterium infantis and promote syntrophic interactions between microbiota that colonize the infant gut. The role of fHMO structure on syntrophic interactions and net microbiome function is not yet fully understood.
    Methods and results: Metabolite production and microbial populations are tracked during mono- and co-culture fermentations of 2'fucosyllactose (2'FL) and difucosyllactose (DFL) by two B. infantis strains and Eubacterium hallii. This is also conducted in an in vitro modeled microbiome supplemented by B. infantis and/or E. hallii. Metabolites are quantified by high performance liquid chromatography. Total B. infantis and E. hallii populations are quantified through qRT-PCR and community composition through 16S amplicon sequencing. Differential metabolism of 2'FL and DFL by B. infantis strains gives rise to strain- and fHMO structure-specific syntrophy with E. hallii. Within the modeled microbial community, fHMO structure does not strongly alter metabolite production in aggregate, potentially due to functional redundancy within the modeled community. In contrast, community composition is dependent on fHMO structure.
    Conclusion: Whereas short chain fatty acid production is not significantly altered by the specific fHMO structure introduced to the modeled community, specific fHMO structure influences the composition of the gut microbiome.
    Mesh-Begriff(e) Humans ; Infant ; Milk, Human/chemistry ; Bifidobacterium longum subspecies infantis/metabolism ; Gastrointestinal Microbiome ; Oligosaccharides/metabolism
    Chemische Substanzen Oligosaccharides
    Sprache Englisch
    Erscheinungsdatum 2023-05-08
    Erscheinungsland Germany
    Dokumenttyp Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural
    ZDB-ID 2160372-8
    ISSN 1613-4133 ; 1613-4125
    ISSN (online) 1613-4133
    ISSN 1613-4125
    DOI 10.1002/mnfr.202200851
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Fucosylated Human Milk Oligosaccharides Drive Structure‐Specific Syntrophy between Bifidobacterium infantis and Eubacterium hallii within a Modeled Infant Gut Microbiome

    Dedon, Liv R. / Hilliard, Margaret A. / Rani, Asha / Daza‐Merchan, Zunny Tatiana / Story, Galaxie / Briere, Carrie‐Ellen / Sela, David A.

    Molecular Nutrition & Food Research. 2023 June, v. 67, no. 11 p.e2200851-

    2023  

    Abstract: SCOPE: Fucosylated human milk oligosaccharides (fHMOs) are metabolized by Bifidobacterium infantis and promote syntrophic interactions between microbiota that colonize the infant gut. The role of fHMO structure on syntrophic interactions and net ... ...

    Abstract SCOPE: Fucosylated human milk oligosaccharides (fHMOs) are metabolized by Bifidobacterium infantis and promote syntrophic interactions between microbiota that colonize the infant gut. The role of fHMO structure on syntrophic interactions and net microbiome function is not yet fully understood. METHODS AND RESULTS: Metabolite production and microbial populations are tracked during mono‐ and co‐culture fermentations of 2ʹfucosyllactose (2ʹFL) and difucosyllactose (DFL) by two B. infantis strains and Eubacterium hallii. This is also conducted in an in vitro modeled microbiome supplemented by B. infantis and/or E. hallii. Metabolites are quantified by high performance liquid chromatography. Total B. infantis and E. hallii populations are quantified through qRT‐PCR and community composition through 16S amplicon sequencing. Differential metabolism of 2ʹFL and DFL by B. infantis strains gives rise to strain‐ and fHMO structure‐specific syntrophy with E. hallii. Within the modeled microbial community, fHMO structure does not strongly alter metabolite production in aggregate, potentially due to functional redundancy within the modeled community. In contrast, community composition is dependent on fHMO structure. CONCLUSION: Whereas short chain fatty acid production is not significantly altered by the specific fHMO structure introduced to the modeled community, specific fHMO structure influences the composition of the gut microbiome.
    Schlagwörter Bifidobacterium longum subsp. infantis ; Eubacterium hallii ; breast milk ; coculture ; community structure ; digestive system ; food research ; high performance liquid chromatography ; intestinal microorganisms ; metabolism ; metabolites ; microbial communities ; microbiome ; nutrition ; oligosaccharides ; short chain fatty acids
    Sprache Englisch
    Erscheinungsverlauf 2023-06
    Erscheinungsort John Wiley & Sons, Ltd
    Dokumenttyp Artikel ; Online
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 2160372-8
    ISSN 1613-4133 ; 1613-4125
    ISSN (online) 1613-4133
    ISSN 1613-4125
    DOI 10.1002/mnfr.202200851
    Datenquelle NAL Katalog (AGRICOLA)

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  4. Artikel: Bifidobacterium infantis

    Dedon, Liv R / Özcan, Ezgi / Rani, Asha / Sela, David A

    Frontiers in nutrition

    2020  Band 7, Seite(n) 583397

    Abstract: Human milk oligosaccharides (HMOs) enrich beneficial bifidobacteria in the infant gut microbiome which produce molecules that impact development and physiology. 2'fucosyllactose (2'FL) is a highly abundant fucosylated HMO which is utilized ... ...

    Abstract Human milk oligosaccharides (HMOs) enrich beneficial bifidobacteria in the infant gut microbiome which produce molecules that impact development and physiology. 2'fucosyllactose (2'FL) is a highly abundant fucosylated HMO which is utilized by
    Sprache Englisch
    Erscheinungsdatum 2020-11-24
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2776676-7
    ISSN 2296-861X
    ISSN 2296-861X
    DOI 10.3389/fnut.2020.583397
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel: Short-chain-fatty acid valerate reduces voluntary alcohol intake in male mice.

    Bokoliya, Suresh C / Russell, Jordan / Dorsett, Yair / Panier, Hunter / Singh, Vijender / Daddi, Lauren / Yuan, Hanshu / Dedon, Liv R / Liu, Zhongmao / Barson, Jessica R / Covault, Jonathan / Bubier, Jason A / Zhou, Yanjiao

    Research square

    2023  

    Abstract: Background: Despite serious health and social consequences, effective intervention strategies for habitual alcohol binge drinking are lacking. Development of novel therapeutic and preventative approaches is highly desirable. Accumulating evidence in the ...

    Abstract Background: Despite serious health and social consequences, effective intervention strategies for habitual alcohol binge drinking are lacking. Development of novel therapeutic and preventative approaches is highly desirable. Accumulating evidence in the past several years has established associations between the gut microbiome and microbial metabolites with drinking behavior, but druggable targets and their underlying mechanism of action are understudied.
    Results: Here, using a drink-in-the-dark mouse model, we identified a microbiome metabolite-based novel treatment (sodium valerate) that can reduce excessive alcohol drinking. Sodium valerate is a sodium salt of valeric acidshort-chain-fatty-acid with similar structure as γ-aminobutyric acid (GABA). Ten days of oral sodium valerate supplementation attenuates excessive alcohol drinking by 40%, reduces blood ethanol concentration by 53%, and improves anxiety-like or approach-avoidance behavior in male mice, without affecting overall food and water intake. Mechanistically, sodium valerate supplementation increases GABA levels across stool, blood, and amygdala. It also significantly increases H4 acetylation in the amygdala of mice. Transcriptomics analysis of the amygdala revealed that sodium valerate supplementation led to changes in gene expression associated with functional pathways including potassium voltage-gated channels, inflammation, glutamate degradation, L-DOPA degradation, and psychological behaviors. 16S microbiome profiling showed that sodium valerate supplementation shifts the gut microbiome composition and decreases microbiome-derived neuroactive compounds through GABA degradation in the gut microbiome.
    Conclusion: Our findings suggest that the sodium valerate holds promise as an innovative therapeutic avenue for the reduction of habitual binge drinking, potentially through multifaceted mechanisms.
    Sprache Englisch
    Erscheinungsdatum 2023-10-30
    Erscheinungsland United States
    Dokumenttyp Preprint
    DOI 10.21203/rs.3.rs-3496323/v1
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel: Strain-Driven Nanoscale Phase Competition near the Antipolar–Nonpolar Phase Boundary in Bi0.7La0.3FeO3 Thin Films

    Dedon, Liv R / Elke Arenholz / Lane W. Martin / Ran Gao / Yajun Qi / Zuhuang Chen

    ACS applied materials & interfaces. 2018 Apr. 11, v. 10, no. 17

    2018  

    Abstract: Complex-oxide materials tuned to be near phase boundaries via chemistry/composition, temperature, pressure, etc. are known to exhibit large susceptibilities. Here, we observe a strain-driven nanoscale phase competition in epitaxially constrained Bi0.7La0. ...

    Abstract Complex-oxide materials tuned to be near phase boundaries via chemistry/composition, temperature, pressure, etc. are known to exhibit large susceptibilities. Here, we observe a strain-driven nanoscale phase competition in epitaxially constrained Bi0.7La0.3FeO3 thin films near the antipolar–nonpolar phase boundary and explore the evolution of the structural, dielectric, (anti)ferroelectric, and magnetic properties with strain. We find that compressive and tensile strains can stabilize an antipolar PbZrO3-like Pbam phase and a nonpolar Pnma orthorhombic phase, respectively. Heterostructures grown with little to no strain exhibit a self-assembled nanoscale mixture of the two orthorhombic phases, wherein the relative fraction of each phase can be modified with film thickness. Subsequent investigation of the dielectric and (anti)ferroelectric properties reveals an electric-field-driven phase transformation from the nonpolar phase to the antipolar phase. X-ray linear dichroism reveals that the antiferromagnetic-spin axes can be effectively modified by the strain-induced phase transition. This evolution of antiferromagnetic-spin axes can be leveraged in exchange coupling between the antiferromagnetic Bi0.7La0.3FeO3 and a ferromagnetic Co0.9Fe0.1 layer to tune the ferromagnetic easy axis of the Co0.9Fe0.1. These results demonstrate that besides chemical alloying, epitaxial strain is an alternative and effective way to modify subtle phase relations and tune physical properties in rare earth-alloyed BiFeO3. Furthermore, the observation of antiferroelectric-antiferromagnetic properties in the Pbam Bi0.7La0.3FeO3 phase could be of significant scientific interest and great potential in magnetoelectric devices because of its dual antiferroic nature.
    Schlagwörter ferrimagnetic materials ; magnetic properties ; phase transition ; temperature ; tensile strength ; X-radiation
    Sprache Englisch
    Erscheinungsverlauf 2018-0411
    Umfang p. 14914-14921.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ISSN 1944-8252
    DOI 10.1021/acsami.8b02597
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  7. Artikel ; Online: Strain-Driven Nanoscale Phase Competition near the Antipolar-Nonpolar Phase Boundary in Bi

    Dedon, Liv R / Chen, Zuhuang / Gao, Ran / Qi, Yajun / Arenholz, Elke / Martin, Lane W

    ACS applied materials & interfaces

    2018  Band 10, Heft 17, Seite(n) 14914–14921

    Abstract: Complex-oxide materials tuned to be near phase boundaries via chemistry/composition, temperature, pressure, etc. are known to exhibit large susceptibilities. Here, we observe a strain-driven nanoscale phase competition in epitaxially constrained ... ...

    Abstract Complex-oxide materials tuned to be near phase boundaries via chemistry/composition, temperature, pressure, etc. are known to exhibit large susceptibilities. Here, we observe a strain-driven nanoscale phase competition in epitaxially constrained Bi
    Sprache Englisch
    Erscheinungsdatum 2018-05-02
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.8b02597
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Facile and Low-Temperature Fabrication of Thermochromic Cr

    Chang, Tianci / Cao, Xun / Li, Ning / Long, Shiwei / Gao, Xiang / Dedon, Liv R / Sun, Guangyao / Luo, Hongjie / Jin, Ping

    ACS applied materials & interfaces

    2017  Band 9, Heft 31, Seite(n) 26029–26037

    Abstract: In the pursuit of energy efficient materials, vanadium dioxide ( ... ...

    Abstract In the pursuit of energy efficient materials, vanadium dioxide (VO
    Sprache Englisch
    Erscheinungsdatum 2017-08-09
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.7b07137
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel: Facile and Low-Temperature Fabrication of Thermochromic Cr2O3/VO2 Smart Coatings: Enhanced Solar Modulation Ability, High Luminous Transmittance and UV-Shielding Function

    Chang, Tianci / Cao Xun / Li Ning / Long Shiwei / Gao Xiang / Dedon Liv R / Sun Guangyao / Luo Hongjie / Jin Ping

    ACS Applied Materials & Interfaces. 2017 Aug. 09, v. 9, no. 31

    2017  

    Abstract: In the pursuit of energy efficient materials, vanadium dioxide (VO₂) based smart coatings have gained much attention in recent years. For smart window applications, VO₂ thin films should be fabricated at low temperature to reduce the cost in ... ...

    Abstract In the pursuit of energy efficient materials, vanadium dioxide (VO₂) based smart coatings have gained much attention in recent years. For smart window applications, VO₂ thin films should be fabricated at low temperature to reduce the cost in commercial fabrication and solve compatibility problems. Meanwhile, thermochromic performance with high luminous transmittance and solar modulation ability, as well as effective UV shielding function has become the most important developing strategy for ideal smart windows. In this work, facile Cr₂O₃/VO₂ bilayer coatings on quartz glasses were designed and fabricated by magnetron sputtering at low temperatures ranging from 250 to 350 °C as compared with typical high growth temperatures (>450 °C). The bottom Cr₂O₃ layer not only provides a structural template for the growth of VO₂ (R), but also serves as an antireflection layer for improving the luminous transmittance. It was found that the deposition of Cr₂O₃ layer resulted in a dramatic enhancement of the solar modulation ability (56.4%) and improvement of luminous transmittance (26.4%) when compared to single-layer VO₂ coating. According to optical measurements, the Cr₂O₃/VO₂ bilayer structure exhibits excellent optical performances with an enhanced solar modulation ability (ΔTₛₒₗ = 12.2%) and a high luminous transmittance (Tₗᵤₘ,ₗₜ = 46.0%), which makes a good balance between ΔTₛₒₗ and Tₗᵤₘ for smart windows applications. As for UV-shielding properties, more than 95.8% UV radiation (250–400 nm) can be blocked out by the Cr₂O₃/VO₂ structure. In addition, the visualized energy-efficient effect was modeled by heating a beaker of water using infrared imaging method with/without a Cr₂O₃/VO₂ coating glass.
    Schlagwörter coatings ; energy efficiency ; glass ; image analysis ; quartz ; temperature ; transmittance ; ultraviolet radiation ; vanadium
    Sprache Englisch
    Erscheinungsverlauf 2017-0809
    Umfang p. 26029-26037.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ISSN 1944-8252
    DOI 10.1021%2Facsami.7b07137
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  10. Artikel ; Online: Microwave a.c. conductivity of domain walls in ferroelectric thin films.

    Tselev, Alexander / Yu, Pu / Cao, Ye / Dedon, Liv R / Martin, Lane W / Kalinin, Sergei V / Maksymovych, Petro

    Nature communications

    2016  Band 7, Seite(n) 11630

    Abstract: Ferroelectric domain walls are of great interest as elementary building blocks for future electronic devices due to their intrinsic few-nanometre width, multifunctional properties and field-controlled topology. To realize the electronic functions, domain ...

    Abstract Ferroelectric domain walls are of great interest as elementary building blocks for future electronic devices due to their intrinsic few-nanometre width, multifunctional properties and field-controlled topology. To realize the electronic functions, domain walls are required to be electrically conducting and addressable non-destructively. However, these properties have been elusive because conducting walls have to be electrically charged, which makes them unstable and uncommon in ferroelectric materials. Here we reveal that spontaneous and recorded domain walls in thin films of lead zirconate and bismuth ferrite exhibit large conductance at microwave frequencies despite being insulating at d.c. We explain this effect by morphological roughening of the walls and local charges induced by disorder with the overall charge neutrality. a.c. conduction is immune to large contact resistance enabling completely non-destructive walls read-out. This demonstrates a technological potential for harnessing a.c. conduction for oxide electronics and other materials with poor d.c. conduction, particularly at the nanoscale.
    Sprache Englisch
    Erscheinungsdatum 2016-05-31
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/ncomms11630
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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