LIVIVO - Das Suchportal für Lebenswissenschaften

switch to English language
Erweiterte Suche

Ihre letzten Suchen

  1. AU="Thiermann, Horst"
  2. AU="Gullo, Paride"
  3. AU="Lewis, Gayle"
  4. AU=Jain Harshwardhan AU=Jain Harshwardhan
  5. AU="Gaur, Aman"
  6. AU=Huynh Thu P.
  7. AU=Giebel Clarissa
  8. AU=Laskin Daniel M

Suchergebnis

Treffer 1 - 10 von insgesamt 309

Suchoptionen

  1. Buch ; Online: Chemical warfare toxicology

    Worek, Franz / Jenner, John / Thiermann, Horst

    (Issues in toxicology ; ...)

    2016  

    Verfasserangabe edited by Franz S. Worek, John Jenner and Horst Thiermann
    Serientitel Issues in toxicology
    ...
    Sprache Englisch
    Erscheinungsverlauf 2016-9999
    Umfang 2 Bände
    Verlag Royal Society of Chemistry
    Erscheinungsort Cambridge
    Erscheinungsland Vereinigtes Königreich
    Dokumenttyp Buch ; Online
    HBZ-ID HT019065477
    ISBN 978-1-78262-806-4 ; 1-78262-806-1
    Datenquelle ZB MED Katalog Medizin, Gesundheit, Ernährung, Umwelt, Agrar

    Kategorien

  2. Buch ; Online ; E-Book: Chemical warfare toxicology / 2

    Worek, Franz / Jenner, John / Thiermann, Horst

    (Issues in toxicology ; no. 27)

    2016  

    Verfasserangabe edited by Franz S. Worek, John Jenner and Horst Thiermann
    Serientitel Issues in toxicology ; no. 27
    Chemical warfare toxicology
    Überordnung Chemical warfare toxicology
    Schlagwörter Chemical agents (Munitions) / Toxicology ; Chemical warfare
    Sprache Englisch
    Umfang Online-Ressource (325 Seiten)
    Verlag Royal Society of Chemistry
    Erscheinungsort Cambridge
    Erscheinungsland Vereinigtes Königreich
    Dokumenttyp Buch ; Online ; E-Book
    Bemerkung Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    HBZ-ID HT019072041
    ISBN 978-1-7826-2807-1 ; 1-7826-2807-X
    Datenquelle ZB MED Katalog Medizin, Gesundheit, Ernährung, Umwelt, Agrar

    Kategorien

  3. Buch ; Online ; E-Book: Chemical warfare toxicology / 1

    Worek, Franz / Jenner, John / Thiermann, Horst

    (Issues in toxicology ; no. 26)

    2016  

    Verfasserangabe edited by Franz S. Worek, John Jenner and Horst Thiermann
    Serientitel Issues in toxicology ; no. 26
    Chemical warfare toxicology
    Überordnung Chemical warfare toxicology
    Schlagwörter Chemical agents (Munitions) / Toxicology ; Chemical warfare
    Sprache Englisch
    Umfang Online-Ressource (333 Seiten)
    Verlag Royal Society of Chemistry
    Erscheinungsort Cambridge
    Erscheinungsland Vereinigtes Königreich
    Dokumenttyp Buch ; Online ; E-Book
    Bemerkung Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    HBZ-ID HT019063088
    ISBN 978-1-78262-241-3 ; 9781782628071 ; 1-78262-241-1 ; 178262807X
    Datenquelle ZB MED Katalog Medizin, Gesundheit, Ernährung, Umwelt, Agrar

    Kategorien

  4. Artikel ; Online: Pro: Oximes should be used routinely in organophosphate poisoning.

    Thiermann, Horst / Worek, Franz

    British journal of clinical pharmacology

    2022  Band 88, Heft 12, Seite(n) 5064–5069

    Abstract: In poisoning with organophosphorus compounds (OP), patients can only profit from the regeneration of acetylcholinesterase, when the poison load has dropped below a toxic level. Every measure that allows an increase of synaptic acetylcholinesterase (AChE) ...

    Abstract In poisoning with organophosphorus compounds (OP), patients can only profit from the regeneration of acetylcholinesterase, when the poison load has dropped below a toxic level. Every measure that allows an increase of synaptic acetylcholinesterase (AChE) activity at the earliest is essential for timely termination of the cholinergic crisis. Only drug-induced reactivation allows fast restoration of the inhibited AChE. Obidoxime and pralidoxime have proved to be able to reactivate inhibited cholinesterase thereby saving life of poisoned animals. A plasma level of obidoxime or pralidoxime allowing reactivation in humans poisoned by OP can be adjusted. There is no doubt that obidoxime and pralidoxime are able to reactivate OP-inhibited AChE activity in poisoned patients, thereby increasing AChE activity and contributing substantially to terminate cholinergic crisis. Hence, a benefit may be expected when substantial reactivation is achieved. A test system allowing determination of red blood cell AChE activity, reactivatability, inhibitory equivalents and butyrylcholinesterase activity is available for relatively low cost. If any reactivation is possible while inhibiting equivalents are present, oxime therapy should be maintained. In particular, when balancing the benefit risk assessment, obidoxime or palidoxime should be given as soon as possible and as long as a substantial reactivation may be expected.
    Mesh-Begriff(e) Humans ; Animals ; Organophosphate Poisoning/drug therapy ; Oximes/therapeutic use ; Obidoxime Chloride/pharmacology ; Obidoxime Chloride/therapeutic use ; Acetylcholinesterase ; Cholinesterase Reactivators/therapeutic use ; Cholinesterase Reactivators/pharmacology ; Butyrylcholinesterase ; Cholinesterase Inhibitors
    Chemische Substanzen pralidoxime (P7MU9UTP52) ; Oximes ; Obidoxime Chloride (3HXR312Z9M) ; Acetylcholinesterase (EC 3.1.1.7) ; Cholinesterase Reactivators ; Butyrylcholinesterase (EC 3.1.1.8) ; Cholinesterase Inhibitors
    Sprache Englisch
    Erscheinungsdatum 2022-02-07
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 188974-6
    ISSN 1365-2125 ; 0306-5251 ; 0264-3774
    ISSN (online) 1365-2125
    ISSN 0306-5251 ; 0264-3774
    DOI 10.1111/bcp.15215
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  5. Artikel ; Online: The phosphylated butyrylcholinesterase-derived tetrapeptide GlyGluSerAla proves exposure to organophosphorus agents with enantioselectivity.

    Kranawetvogl, Tamara / Siegert, Markus / Steinritz, Dirk / Thiermann, Horst / John, Harald

    Archives of toxicology

    2024  Band 98, Heft 3, Seite(n) 791–806

    Abstract: We herein present for the first time the phosphylated (*) tetrapeptide (TP)-adduct ... ...

    Abstract We herein present for the first time the phosphylated (*) tetrapeptide (TP)-adduct GlyGluSer
    Mesh-Begriff(e) Butyrylcholinesterase/metabolism ; Tandem Mass Spectrometry/methods ; Organothiophosphorus Compounds/toxicity ; Organophosphorus Compounds/toxicity ; Nerve Agents/toxicity ; Chemical Warfare Agents/toxicity ; Chemical Warfare Agents/chemistry
    Chemische Substanzen Butyrylcholinesterase (EC 3.1.1.8) ; VX (9A4381183B) ; Organothiophosphorus Compounds ; Organophosphorus Compounds ; Nerve Agents ; Chemical Warfare Agents
    Sprache Englisch
    Erscheinungsdatum 2024-01-24
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 124992-7
    ISSN 1432-0738 ; 0340-5761
    ISSN (online) 1432-0738
    ISSN 0340-5761
    DOI 10.1007/s00204-023-03657-3
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  6. Artikel ; Online: A pharmacologically pre-contracted smooth muscle bowel model for the study of highly-potent opioid receptor agonists and antagonists.

    Amend, Niko / Thiermann, Horst / Worek, Franz / Wille, Timo

    Toxicology letters

    2023  Band 382, Seite(n) 41–46

    Abstract: Isolated organ models are a versatile tool for pharmacological and toxicological research. Small bowel has been used to assess the inhibition of smooth muscle contraction by opioids. In the present study, we set out to establish a pharmacologically ... ...

    Abstract Isolated organ models are a versatile tool for pharmacological and toxicological research. Small bowel has been used to assess the inhibition of smooth muscle contraction by opioids. In the present study, we set out to establish a pharmacologically stimulated rat bowel model. The effects of carfentanil, remifentanil and the new synthetic opioid U-48800 and their respective antagonists naloxone, nalmefene and naltrexone were studied in a small bowel model in rats. The IC
    Mesh-Begriff(e) Rats ; Animals ; Analgesics, Opioid/toxicity ; Naltrexone/pharmacology ; Remifentanil ; Narcotic Antagonists/pharmacology ; Naloxone/pharmacology ; Receptors, Opioid ; Muscle, Smooth
    Chemische Substanzen Analgesics, Opioid ; Naltrexone (5S6W795CQM) ; Remifentanil (P10582JYYK) ; Narcotic Antagonists ; Naloxone (36B82AMQ7N) ; Receptors, Opioid
    Sprache Englisch
    Erscheinungsdatum 2023-05-26
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article
    ZDB-ID 433788-8
    ISSN 1879-3169 ; 0378-4274
    ISSN (online) 1879-3169
    ISSN 0378-4274
    DOI 10.1016/j.toxlet.2023.05.010
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  7. Artikel ; Online: Poisoning by organophosphorus nerve agents and pesticides: An overview of the principle strategies and current progress of mass spectrometry-based procedures for verification.

    John, Harald / Thiermann, Horst

    Journal of mass spectrometry and advances in the clinical lab

    2021  Band 19, Seite(n) 20–31

    Abstract: Intoxication by organophosphorus (OP) poisons, like nerve agents and pesticides, is characterized by the life-threatening inhibition of acetylcholinesterase (AChE) caused by covalent reaction with the serine residue of the active site of the enzyme ( ... ...

    Abstract Intoxication by organophosphorus (OP) poisons, like nerve agents and pesticides, is characterized by the life-threatening inhibition of acetylcholinesterase (AChE) caused by covalent reaction with the serine residue of the active site of the enzyme (phosphylation). Similar reactions occur with butyrylcholinesterase (BChE) and serum albumin present in blood as dissolved proteins. For forensic purposes, products (adducts) with the latter proteins are highly valuable long-lived biomarkers of exposure to OP agents that are accessible by diverse mass spectrometric procedures. In addition, the evidence of poison incorporation might also succeed by the detection of remaining traces of the agent itself, but more likely its hydrolysis and/or enzymatic degradation products. These relatively short-lived molecules are distributed in blood and tissue, and excreted via urine. This review presents the mass spectrometry-based methods targeting the different groups of biomarkers in biological samples, which are already internationally accepted by the Organisation for the Prohibition of Chemical Weapons (OPCW), introduces novel approaches in the field of biomedical verification, and outlines the strict quality criteria that must be fulfilled for unambiguous forensic analysis.
    Sprache Englisch
    Erscheinungsdatum 2021-02-02
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article ; Review
    ISSN 2667-145X
    ISSN (online) 2667-145X
    DOI 10.1016/j.jmsacl.2021.01.002
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  8. Artikel: Nontargeted High-Resolution Mass Spectrometric Workflow for the Detection of Butyrylcholinesterase-Derived Adducts with Organophosphorus Toxicants and Structural Characterization of Their Phosphyl Moiety after In-Source Fragmentation

    John, Harald / Dentzel, Marina / Siegert, Markus / Thiermann, Horst

    Analytical chemistry. 2022 Jan. 18, v. 94, no. 4

    2022  

    Abstract: Organophosphorus (OP) nerve agents were used for chemical warfare, assassination, and attempted murder of individuals. Therefore, forensic methods are required to identify known and unknown incorporated OP poisons. Serum is tested for the presence of ... ...

    Abstract Organophosphorus (OP) nerve agents were used for chemical warfare, assassination, and attempted murder of individuals. Therefore, forensic methods are required to identify known and unknown incorporated OP poisons. Serum is tested for the presence of covalent reaction products (adducts) of the toxicant with, e.g., butyrylcholinesterase (BChE) typically by targeted analysis, thus only detecting known OP adducts. We herein present a nontargeted two-step mass spectrometry (MS)-based workflow taking advantage of a high-resolution (HR) Orbitrap mass spectrometer and its option for in-source collision-induced dissociation (IS-CID) highly valuable for the detection of unknown agents. BChE adducts are extracted by immunomagnetic separation and proteolyzed with pepsin yielding a phosphylated nonapeptide (NP) biomarker NP(OP). In step 1, the sample is separated by micro liquid chromatography (μLC) detecting the NP(OP) by nontargeted HR MS followed by data-dependent tandem-MS (ddMS2). Extracted ion chromatograms of diagnostic product ions at m/z 778.33661, 673.29402, and 602.25690 reveal the accurate mass of the NP(OP) precursor ion as well as the elemental composition of the adducted phosphyl moiety. Considering this information, a second μLC run is performed (step 2) for nonselective IS-CID of NP(OP) yielding the cleaved charged phosphyl moiety. This fragment ion is immediately subjected to targeted CID in parallel reaction monitoring (PRM). The accurate mass of its product ions allows the determination of their elemental composition and thus supports its structural elucidation. The described workflow was exemplarily applied to NP(OP) of three Tamelin esters and VX providing highly appropriate abilities for the detection of adducts even of unknown OP poisons like Novichok agents.
    Schlagwörter analytical chemistry ; biomarkers ; blood serum ; cholinesterase ; dissociation ; elemental composition ; forensic sciences ; immunomagnetic separation ; liquid chromatography ; mass spectrometry ; moieties ; nerve tissue ; pepsin ; spectrometers
    Sprache Englisch
    Erscheinungsverlauf 2022-0118
    Umfang p. 2048-2055.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ZDB-ID 1508-8
    ISSN 1520-6882 ; 0003-2700
    ISSN (online) 1520-6882
    ISSN 0003-2700
    DOI 10.1021/acs.analchem.1c04116
    Datenquelle NAL Katalog (AGRICOLA)

    Zusatzmaterialien

    Kategorien

  9. Artikel ; Online: Nontargeted High-Resolution Mass Spectrometric Workflow for the Detection of Butyrylcholinesterase-Derived Adducts with Organophosphorus Toxicants and Structural Characterization of Their Phosphyl Moiety after In-Source Fragmentation.

    John, Harald / Dentzel, Marina / Siegert, Markus / Thiermann, Horst

    Analytical chemistry

    2022  Band 94, Heft 4, Seite(n) 2048–2055

    Abstract: Organophosphorus (OP) nerve agents were used for chemical warfare, assassination, and attempted murder of individuals. Therefore, forensic methods are required to identify known and unknown incorporated OP poisons. Serum is tested for the presence of ... ...

    Abstract Organophosphorus (OP) nerve agents were used for chemical warfare, assassination, and attempted murder of individuals. Therefore, forensic methods are required to identify known and unknown incorporated OP poisons. Serum is tested for the presence of covalent reaction products (adducts) of the toxicant with, e.g., butyrylcholinesterase (BChE) typically by targeted analysis, thus only detecting known OP adducts. We herein present a nontargeted two-step mass spectrometry (MS)-based workflow taking advantage of a high-resolution (HR) Orbitrap mass spectrometer and its option for in-source collision-induced dissociation (IS-CID) highly valuable for the detection of unknown agents. BChE adducts are extracted by immunomagnetic separation and proteolyzed with pepsin yielding a phosphylated nonapeptide (NP) biomarker NP(OP). In step 1, the sample is separated by micro liquid chromatography (μLC) detecting the NP(OP) by nontargeted HR MS followed by data-dependent tandem-MS (ddMS2). Extracted ion chromatograms of diagnostic product ions at
    Mesh-Begriff(e) Butyrylcholinesterase ; Humans ; Immunomagnetic Separation ; Nerve Agents/chemistry ; Tandem Mass Spectrometry/methods ; Workflow
    Chemische Substanzen Nerve Agents ; Butyrylcholinesterase (EC 3.1.1.8)
    Sprache Englisch
    Erscheinungsdatum 2022-01-18
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1508-8
    ISSN 1520-6882 ; 0003-2700
    ISSN (online) 1520-6882
    ISSN 0003-2700
    DOI 10.1021/acs.analchem.1c04116
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  10. Artikel ; Online: Alkylated glutamic acid and histidine derived from protein-adducts indicate exposure to sulfur mustard in avian serum.

    John, Harald / Hörmann, Philipp / Schrader, Michael / Thiermann, Horst

    Drug testing and analysis

    2022  Band 14, Heft 6, Seite(n) 1140–1148

    Abstract: Sulfur mustard (SM, bis[2-chloroethyl]-sulfide) is a banned chemical warfare agent deployed in the violent conflict in the Middle East poisoning humans and animals. For legal reasons, bioanalytical methods are mandatory proving exposure to SM. Reaction ... ...

    Abstract Sulfur mustard (SM, bis[2-chloroethyl]-sulfide) is a banned chemical warfare agent deployed in the violent conflict in the Middle East poisoning humans and animals. For legal reasons, bioanalytical methods are mandatory proving exposure to SM. Reaction products (adducts) of SM with endogenous proteins, for example, serum albumin (SA), are valuable long-lived targets for analysis. Whereas nearly all methods known so far focus on human proteins, we address for the first time neat chicken SA and avian serum from chicken, duck, and ostrich. After proteolysis, protein precipitation, evaporation of the supernatant, and re-dissolution analysis were performed by micro-liquid chromatography-electrospray ionization tandem-mass spectrometry in the selected reaction monitoring mode, μLC-ESI MS/MS (SRM), for detection of the hydroxyethylthioethyl product ion [HETE]
    Mesh-Begriff(e) Chemical Warfare Agents/analysis ; Glutamic Acid ; Histidine ; Hydroxyeicosatetraenoic Acids ; Mustard Gas/chemistry ; Serum Albumin/metabolism ; Serum Albumin, Human/chemistry ; Tandem Mass Spectrometry/methods
    Chemische Substanzen Chemical Warfare Agents ; Hydroxyeicosatetraenoic Acids ; Serum Albumin ; Glutamic Acid (3KX376GY7L) ; Histidine (4QD397987E) ; Mustard Gas (T8KEC9FH9P) ; Serum Albumin, Human (ZIF514RVZR)
    Sprache Englisch
    Erscheinungsdatum 2022-02-17
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2462336-2
    ISSN 1942-7611 ; 1942-7603
    ISSN (online) 1942-7611
    ISSN 1942-7603
    DOI 10.1002/dta.3236
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

Zum Seitenanfang