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  1. Article: Rediscovery of Gasteranthus extinctus L.E.Skog & L.P.Kvist (Gesneriaceae) at multiple sites in western Ecuador

    Pitman, Nigel C. A. / White, Dawson M. / Andino, Juan Ernesto Guevara / Couvreur, Thomas L. P. / Fortier, Riley P. / Zapata, José Nicolás / Cornejo, Xavier / Clark, John L. / Feeley, Kenneth J. / Johnston, Mark K. / Lozinguez, Alix / Rivas-Torres, Gonzalo

    PhytoKeys. 2022 Apr. 15, v. 194

    2022  

    Abstract: AbstractWe report the rediscovery of the Critically Endangered cloud forest herb Gasteranthus extinctus, not seen since 1985. In 2019 and 2021, G. extinctus was recorded at five sites in the western foothills of the Ecuadorian Andes, 4–25 km from the ... ...

    Abstract AbstractWe report the rediscovery of the Critically Endangered cloud forest herb Gasteranthus extinctus, not seen since 1985. In 2019 and 2021, G. extinctus was recorded at five sites in the western foothills of the Ecuadorian Andes, 4–25 km from the type locality at the celebrated Centinela ridge. We describe the species’ distribution, abundance, habitat and conservation status and offer recommendations for further research and conservation efforts focused on G. extinctus and the small, disjunct forest remnants it occupies.
    Keywords Gesneriaceae ; conservation status ; habitats ; tropical montane cloud forests ; Andes region ; Ecuador
    Language English
    Dates of publication 2022-0415
    Size p. 33-46.
    Publishing place Pensoft Publishers
    Document type Article
    ZDB-ID 2579891-1
    ISSN 1314-2003 ; 1314-2011
    ISSN (online) 1314-2003
    ISSN 1314-2011
    DOI 10.3897/phytokeys.194.79638
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Reply to B. P. L. Wijnhoven et al and F. Nuytens et al.

    Markar, Sheraz R / van Berge Henegouwen, Mark I

    Journal of clinical oncology : official journal of the American Society of Clinical Oncology

    2020  Volume 39, Issue 1, Page(s) 92–93

    MeSH term(s) Esophagectomy ; Humans
    Language English
    Publishing date 2020-09-18
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 604914-x
    ISSN 1527-7755 ; 0732-183X
    ISSN (online) 1527-7755
    ISSN 0732-183X
    DOI 10.1200/JCO.20.02354
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: The anti-MRSA compound 3-O-alpha-L-(2″,3″-di-p-coumaroyl)rhamnoside (KCR) inhibits protein synthesis in Staphylococcus aureus.

    Carruthers, Nicholas J / Stemmer, Paul M / Media, Joe / Swartz, Ken / Wang, Xiaojuan / Aube, Nicholas / Hamann, Mark T / Valeriote, Frederick / Shaw, Jiajiu

    Journal of proteomics

    2019  Volume 210, Page(s) 103539

    Abstract: ... 3-O-alpha-L-(2″,3″-di-p-coumaroyl)rhamnoside (KCR) is a natural product antibiotic that is effective ... extended hospital stays. 3-O-alpha-L-(2″,3″-di-p-coumaroyl)rhamnoside (KCR) is a natural product antibiotic ...

    Abstract Methicillin-resistant S aureus (MRSA) contributes to patient mortality and extended hospital stays. 3-O-alpha-L-(2″,3″-di-p-coumaroyl)rhamnoside (KCR) is a natural product antibiotic that is effective against MRSA but has no known mechanism of action (MOA). We used proteomics to identify the MOA for KCR. Methicillin sensitive S aureus and a mixture of four KCR stereoisomers were tested. A time-kill assay was used to choose a 4 h treatment using KCR at 5× its MIC for proteomic analysis. S aureus was treated in triplicate with KCR, oxacillin or vehicle and quantitative proteomic analysis was carried out using isobaric tags and mass spectrometry. 1190 proteins were identified and 552 were affected by KCR (q < 0.01). Ontology analysis identified 6 distinct translation-related categories that were affected by KCR (PIANO, 10% false-discovery rate) including structural constituent of ribosome, translation, rRNA binding, tRNA binding, tRNA processing and aminoacyl-tRNA ligase activity. Median fold changes (KCR vs Control) for small and large ribosomal components were 1.46 and 1.43 respectively. KCR inhibited the production of luciferase protein in an in vitro assay (IC50 39.6 μg/ml). Upregulation of translation-related proteins in response to KCR indicates that KCR acts to disrupt S aureus protein synthesis. This was confirmed with an in vitro transcription/translation assay. SIGNIFICANCE: Methicillin-resistant S aureus (MRSA) contributes to patient mortality and extended hospital stays. 3-O-alpha-L-(2″,3″-di-p-coumaroyl)rhamnoside (KCR) is a natural product antibiotic that is effective against MRSA but has no known mechanism of action (MOA). Using proteomic analysis we determined that KCR acts by inhibiting protein synthesis. KCR is an exciting novel antibiotic and this work represents an important step in its development towards clinical use.
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Bacterial Proteins/metabolism ; Humans ; Kaempferols/pharmacology ; Methicillin-Resistant Staphylococcus aureus/drug effects ; Methicillin-Resistant Staphylococcus aureus/isolation & purification ; Methicillin-Resistant Staphylococcus aureus/metabolism ; Microbial Sensitivity Tests/methods ; Protein Biosynthesis ; Protein Synthesis Inhibitors/pharmacology ; Proteomics/methods ; Rhamnose/analogs & derivatives ; Rhamnose/pharmacology ; Staphylococcal Infections/drug therapy ; Staphylococcal Infections/metabolism ; Staphylococcal Infections/microbiology
    Chemical Substances Anti-Bacterial Agents ; Bacterial Proteins ; Kaempferols ; Protein Synthesis Inhibitors ; kaempferol-3-O-alpha-L-(2',3'-di-p-coumaroyl)rhamnoside ; Rhamnose (QN34XC755A)
    Language English
    Publishing date 2019-10-17
    Publishing country Netherlands
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2400835-7
    ISSN 1876-7737 ; 1874-3919
    ISSN (online) 1876-7737
    ISSN 1874-3919
    DOI 10.1016/j.jprot.2019.103539
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Affinity and kinetics of sialyl Lewis-X and core-2 based oligosaccharides binding to L- and P-selectin.

    Beauharnois, Mark E / Lindquist, Kevin C / Marathe, Dhananjay / Vanderslice, Peter / Xia, Jie / Matta, Khushi L / Neelamegham, Sriram

    Biochemistry

    2005  Volume 44, Issue 27, Page(s) 9507–9519

    Abstract: ... on sialyl Lewis-X (sLe(X)) and complex molecules with the core-2 structure to L- and P-selectin, under ... GalNAcbeta1,3)GalNAcalpha-OMe was identified which blocked L- and P-selectin binding at 30-100-fold lower ... fold poorer inhibitors of L-selectin mediated cell adhesion compared to their methyl glycosides. (ii ...

    Abstract Soluble oligosaccharide mimetics of natural selectin ligands act as competitive inhibitors of leukocyte adhesion in models of inflammation. We quantified the binding of simple oligosaccharides based on sialyl Lewis-X (sLe(X)) and complex molecules with the core-2 structure to L- and P-selectin, under both static and fluid flow conditions. Isolated human neutrophils were employed to mimic the physiological valency of selectins and selectin ligands. Surface plasmon resonance studies quantified binding kinetics. We observed the following: (i) The functional group at the anomeric position of carbohydrates plays an important role during selectin recognition, since sLe(X) and sialyl Lewis-a (sLe(a)) were approximately 5-7-fold poorer inhibitors of L-selectin mediated cell adhesion compared to their methyl glycosides. (ii) Despite their homology to physiological glycans, the putative carbohydrate epitopes of GlyCAM-1 and PSGL-1 bound selectins with low affinity comparable to that of sLe(X)-selectin interactions. Thus, besides the carbohydrate portion, the protein core of GlyCAM-1 or the presentation of carbohydrates in clusters on this glycoprotein may contribute to selectin recognition. (iii) A compound Galbeta1,4(Fucalpha1,3)GlcNAcbeta1,6(GalNAcbeta1,3)GalNAcalpha-OMe was identified which blocked L- and P-selectin binding at 30-100-fold lower doses than sLe(X). (iv) Surface plasmon resonance experiments determined that an sLe(X) analogue (TBC1269) competitively inhibited, via steric/allosteric mechanisms, the binding of two anti-P-selectin function blocking antibodies that recognized different epitopes of P-selectin. (v) TBC1269 bound P-selectin via both calcium-dependent and -independent mechanisms, with K(D) of approximately 111.4 microM. The measured on- and off-rates were high (k(off) > 3 s(-)(1), k(on) > 27,000 M(-)(1) s(-)(1)). Similar binding kinetics are expected for sLe(X)-selectin interactions. Taken together, our study provides new insight into the kinetics and mechanisms of carbohydrate interaction with selectins.
    MeSH term(s) Animals ; Binding, Competitive/drug effects ; Binding, Competitive/physiology ; Biphenyl Compounds/chemistry ; Biphenyl Compounds/metabolism ; CHO Cells ; Carbohydrate Sequence ; Cell Aggregation/drug effects ; Cell Aggregation/physiology ; Cricetinae ; Humans ; Kinetics ; L-Selectin/genetics ; L-Selectin/metabolism ; Lewis Blood-Group System/chemistry ; Lewis Blood-Group System/metabolism ; Ligands ; Mannose/analogs & derivatives ; Mannosides/chemistry ; Mannosides/metabolism ; Molecular Sequence Data ; N-Acetylglucosaminyltransferases/chemistry ; N-Acetylglucosaminyltransferases/metabolism ; Neutrophils/drug effects ; Neutrophils/metabolism ; Neutrophils/physiology ; Oligosaccharides/chemistry ; Oligosaccharides/metabolism ; P-Selectin/genetics ; P-Selectin/metabolism ; Protein Binding/drug effects ; Protein Binding/physiology ; Recombinant Fusion Proteins/antagonists & inhibitors ; Recombinant Fusion Proteins/metabolism ; Rheology ; Surface Plasmon Resonance ; Trisaccharides/chemistry ; Trisaccharides/metabolism
    Chemical Substances 5-acetylneuraminyl-(2-3)-galactosyl-(1-4)-(fucopyranosyl-(1-3))-N-acetylglucosamine ; Biphenyl Compounds ; Lewis Blood-Group System ; Ligands ; Mannosides ; Oligosaccharides ; P-Selectin ; Recombinant Fusion Proteins ; Trisaccharides ; L-Selectin (126880-86-2) ; galactosyl beta(1-3)-N-acetylglucosaminyl-beta(1-6)-N-acetylgalactosamine (73499-58-8) ; bimosiamose disodium (7AK2FKB9AW) ; N-Acetylglucosaminyltransferases (EC 2.4.1.-) ; beta-1,3-galactosyl-O-glycosyl-glycoprotein beta-1,6-acetylglucosaminyl transferase (EC 2.4.1.102) ; Mannose (PHA4727WTP)
    Language English
    Publishing date 2005-07-12
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, U.S. Gov't, P.H.S.
    ZDB-ID 1108-3
    ISSN 1520-4995 ; 0006-2960
    ISSN (online) 1520-4995
    ISSN 0006-2960
    DOI 10.1021/bi0507130
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: HPLC Plasma Assay of a Novel Anti-MRSA Compound, Kaempferol-3-O-Alpha-L-(2",3"-di-p-coumaroyl)rhamnoside, from Sycamore Leaves.

    Zhang, Yiguan / Valeriote, Frederick / Swartz, Kenneth / Chen, Ben / Hamann, Mark T / Rodenburg, Douglas L / McChesney, James D / Shaw, Jiajiu

    Natural product communications

    2015  Volume 10, Issue 8, Page(s) 1383–1386

    Abstract: ... from Platanus occidentalis (American sycamore) leaves produced an active kaempferol molecule, 3-O-alpha-L-(2",3"-di-p ...

    Abstract Methicillin-resistant Staphylococcus aureus (MRSA) is a serious pathogen that is resistant to current antibiotic therapy. Thus, there is an urgent need for novel antimicrobial agents that can effectively combat these new strains of drug-resistant "superbugs". Recently, fractionation of an extract from Platanus occidentalis (American sycamore) leaves produced an active kaempferol molecule, 3-O-alpha-L-(2",3"-di-p-coumaroyl)rhamnoside (KCR), in four isomeric forms; all four isomers exhibit potent anti-MRSA activity. In order to further the preclinical development of KCR as a new antibiotic class, we developed and validated a simple analytical method for assaying KCR plasma concentration. Because KCR will be developed as a new drug, although comprising four stereoisomers, the analytical method was devised to assay the total amount of all four isomers. In the present work, both a plasma processing procedure and an HPLC method have been developed and validated. Mouse plasma containing KCR was first treated with ethanol and then centrifuged. The supernatant was dried, suspended in ethanol, centrifuged, and the supernatant was injected into an HPLC system comprising a Waters C18, a mobile phase composing methanol, acetonitrile, and trifluoroacetic acid and monitored at 313 nm. The method was validated by parameters including a good linear correlation, a limit of quantification of 0.27 microg/mL, and high accuracy. In summary, this method allows a rapid analysis of KCR in the plasma samples for pharmacokinetics studies.
    MeSH term(s) Animals ; Anti-Bacterial Agents/blood ; Anti-Bacterial Agents/isolation & purification ; Anti-Bacterial Agents/pharmacology ; Chromatography, High Pressure Liquid/methods ; Humans ; Kaempferols/blood ; Kaempferols/isolation & purification ; Kaempferols/pharmacology ; Magnoliopsida/chemistry ; Methicillin-Resistant Staphylococcus aureus/drug effects ; Mice ; Microbial Sensitivity Tests ; Plant Leaves/chemistry ; Staphylococcal Infections/blood ; Staphylococcal Infections/microbiology
    Chemical Substances Anti-Bacterial Agents ; Kaempferols ; kaempferol-3-O-alpha-L-(2''-E-p-coumaroyl-4''-Z-p-coumaroyl)-rhamnoside
    Language English
    Publishing date 2015-08
    Publishing country United States
    Document type Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1934-578X
    ISSN 1934-578X
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Re: Maud Rijnders, Ronald de Wit, Joost L. Boormans, Martijn P.J. Lolkema, Astrid A.M. van der Veldt. Systematic Review of Immune Checkpoint Inhibition in Urological Cancers. Eur Urol. 2017;72:411-23: Beyond the Survival Rate, Health-related Quality of Life is Important.

    Martinez Merizalde Balarezo, Nelson / Monroe Rivera, Mark / Tejada, Romina A

    European urology

    2017  Volume 73, Issue 3, Page(s) e66

    Language English
    Publishing date 2017-10-31
    Publishing country Switzerland
    Document type Letter
    ZDB-ID 193790-x
    ISSN 1873-7560 ; 1421-993X ; 0302-2838
    ISSN (online) 1873-7560 ; 1421-993X
    ISSN 0302-2838
    DOI 10.1016/j.eururo.2017.10.014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Re: Semen Parameters in Adolescents with Varicocele: Association with Testis Volume Differential and Total Testis Volume: M. P. Kurtz, D. Zurakowski, I. Rosoklija, S. B. Bauer, J. G. Borer, K. L. Johnson, M. Migliozzi and D. A. Diamond J Urol, suppl., 2015;193:1843-1847.

    Faasse, Mark A

    The Journal of urology

    2016  Volume 195, Issue 2, Page(s) 527; discussion 527–8

    MeSH term(s) Humans ; Male ; Semen Analysis ; Sperm Motility ; Testis/pathology ; Varicocele/pathology
    Language English
    Publishing date 2016-02
    Publishing country United States
    Document type Comment ; Letter
    ZDB-ID 3176-8
    ISSN 1527-3792 ; 0022-5347
    ISSN (online) 1527-3792
    ISSN 0022-5347
    DOI 10.1016/j.juro.2015.08.094
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Sapling white pine (Pinus strobus L.) exhibits growth response following selective release from competition with glossy buckthorn (Frangula alnus P. Mill) and associated vegetation

    Lanzer, Nicholas B / Ducey, Mark J / Eisenhaure, Stephen E / Lee, Thomas D

    Forest ecology and management. 2017 Nov. 15, v. 404

    2017  

    Abstract: Invasive glossy buckthorn (Frangula alnus) hampers management of white pine (Pinus strobus) in the northeastern USA, especially when these species co-establish following harvest activities. Our objective was to test the effects on pine sapling growth of ... ...

    Abstract Invasive glossy buckthorn (Frangula alnus) hampers management of white pine (Pinus strobus) in the northeastern USA, especially when these species co-establish following harvest activities. Our objective was to test the effects on pine sapling growth of a simple, quick, and novel silvicultural procedure involving local buckthorn stem removal. We identified 75 five-year-old pine saplings in a Durham, NH, forest regeneration area that was clear-cut in 2009 and which was heavily invaded by buckthorn. All selected pine saplings were surrounded primarily by glossy buckthorn. Around each of 50 of these pine saplings, a 1mradius was cleared (‘cut only’ treatment) and for half of these there was a follow-up herbicide application (‘cut+herbicide’ treatment). Remaining saplings were untreated controls. After one growing season, pines responded to treatment with increased terminal leader biomass (+75%), basal stem diameter (+12%) and bark starch (+140%). Treated pines displayed even greater diameter increase (+29%) after two growing seasons. None of these variables differed across the two treatments. Height of treated pines did not differ from controls, even after the second growing season. When herbicide was used, there were 86% fewer buckthorn sprouts in treated areas, but pine mortality was five times greater (n=5) than in the cut only treatment (n=1). Our results show that, regardless of herbicide use, those pines cleared of surrounding vegetation and not subject to post-treatment mortality exhibited increased vigor and growth, suggesting a greater potential to eventually outgrow competing buckthorn and thus more rapidly reach commercial size.
    Keywords bark ; biomass ; clearcutting ; forest regeneration ; Frangula alnus ; growing season ; herbicides ; mortality ; pesticide application ; Pinus strobus ; saplings ; starch ; vegetation ; vigor ; New Hampshire
    Language English
    Dates of publication 2017-1115
    Size p. 280-288.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 751138-3
    ISSN 0378-1127
    ISSN 0378-1127
    DOI 10.1016/j.foreco.2017.08.049
    Database NAL-Catalogue (AGRICOLA)

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  9. Article ; Online: Re: Magnetic resonance imaging/ultrasound fusion guided prostate biopsy improves cancer detection following transrectal ultrasound biopsy and correlates with multiparametric magnetic resonance imaging: P. A. Pinto, P. H. Chung, A. R. Rastinehad, A. A. Baccala, Jr., J. Kruecker, C. J. Benjamin, S. Xu, P. Yan, S. Kadoury, C. Chua, J. K. Locklin, B. Turkbey, J. H. Shih, S. P. Gates, C. Buckner, G. Bratslavsky, W. M. Linehan, N. D. Glossop, P. L. Choyke and B. J. Wood J Urol 2011; 186: 1281-1285.

    Robertson, Nicola L / Moore, Caroline M / Emberton, Mark

    The Journal of urology

    2012  Volume 187, Issue 4, Page(s) 1511–1512

    MeSH term(s) Biopsy, Needle ; Humans ; Magnetic Resonance Imaging ; Magnetic Resonance Imaging, Interventional ; Male ; Prostate/pathology ; Prostatic Neoplasms/diagnosis ; Ultrasonography, Interventional
    Language English
    Publishing date 2012-02-17
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 3176-8
    ISSN 1527-3792 ; 0022-5347
    ISSN (online) 1527-3792
    ISSN 0022-5347
    DOI 10.1016/j.juro.2011.12.007
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Re: Magnetic Resonance Imaging Underestimation of Prostate Cancer Geometry: Use of Patient Specific Molds to Correlate Images with Whole Mount Pathology: A. Priester, S. Natarajan, P. Khoshnoodi, D. J. Margolis, S. S. Raman, R. E. Reiter, J. Huang, W. Grundfest and L. S. Marks J Urol 2017;197:320-326.

    Orczyk, Clément / Emberton, Mark

    The Journal of urology

    2017  Volume 198, Issue 6, Page(s) 1436–1437

    MeSH term(s) Fungi ; Humans ; Magnetic Resonance Imaging ; Male ; Prostatic Neoplasms
    Language English
    Publishing date 2017-09-06
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 3176-8
    ISSN 1527-3792 ; 0022-5347
    ISSN (online) 1527-3792
    ISSN 0022-5347
    DOI 10.1016/j.juro.2017.07.086
    Database MEDical Literature Analysis and Retrieval System OnLINE

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