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Rosenfeld RM, Kelly JH, Agarwal M, Aspry K, Barnett T, Davis BC, Fields D, Gaillard T, Gulati M, Guthrie GE, Moore DJ, Panigrahi G, Rothberg A, Sannidhi DV, Weatherspoon L, Pauly K, Karlsen MC. Dietary Interventions to Treat Type 2 Diabetes in Adults with a Goal of Remission: An Expert Consensus Statement from the American College of Lifestyle Medicine. Am J Lifestyle Med 2022; 16:342-362. [PMID: 35706589 PMCID: PMC9189586 DOI: 10.1177/15598276221087624] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023] Open
Abstract
Objective The objective of this Expert Consensus Statement is to assist clinicians in achieving remission of type 2 diabetes (T2D) in adults using diet as a primary intervention. Evidence-informed statements agreed upon by a multi-disciplinary panel of expert healthcare professionals were used. Methods Panel members with expertise in diabetes treatment, research, and remission followed an established methodology for developing consensus statements using a modified Delphi process. A search strategist systematically reviewed the literature, and the best available evidence was used to compose statements regarding dietary interventions in adults 18 years and older diagnosed with T2D. Topics with significant practice variation and those that would result in remission of T2D were prioritized. Using an iterative, online process, panel members expressed levels of agreement with the statements, resulting in classification as consensus, near-consensus, or non-consensus based on mean responses and the number of outliers. Results The expert panel identified 131 candidate consensus statements that focused on addressing the following high-yield topics: (1) definitions and basic concepts; (2) diet and remission of T2D; (3) dietary specifics and types of diets; (4) adjuvant and alternative interventions; (5) support, monitoring, and adherence to therapy; (6) weight loss; and (7) payment and policy. After 4 iterations of the Delphi survey and removal of duplicative statements, 69 statements met the criteria for consensus, 5 were designated as near consensus, and 60 were designated as no consensus. In addition, the consensus was reached on the following key issues: (a) Remission of T2D should be defined as HbA1c <6.5% for at least 3 months with no surgery, devices, or active pharmacologic therapy for the specific purpose of lowering blood glucose; (b) diet as a primary intervention for T2D can achieve remission in many adults with T2D and is related to the intensity of the intervention; and (c) diet as a primary intervention for T2D is most effective in achieving remission when emphasizing whole, plant-based foods with minimal consumption of meat and other animal products. Many additional statements that achieved consensus are highlighted in a tabular presentation in the manuscript and elaborated upon in the discussion section. Conclusion Expert consensus was achieved for 69 statements pertaining to diet and remission of T2D, dietary specifics and types of diets, adjuvant and alternative interventions, support, monitoring, adherence to therapy, weight loss, and payment and policy. Clinicians can use these statements to improve quality of care, inform policy and protocols, and identify areas of uncertainty.
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Affiliation(s)
- Richard M Rosenfeld
- Department of Otolaryngology, SUNY Downstate Health Sciences University, Brooklyn, NY, USA (RMR)
| | - John H Kelly
- Loma Linda University School of Medicine, Loma Linda, CA, USA (JHK)
| | - Monica Agarwal
- Department of Medicine Division of Endocrinology, Diabetes, & Metabolism, Birmingham, University of Alabama at Birmingham, AL, USA (MA)
| | - Karen Aspry
- Lipid and Prevention Program, Lifespan Cardiovascular Institute, East Greenwich, RI, USA (KA)
| | - Ted Barnett
- Rochester Lifestyle Medicine Institute, Rochester, NY, USA (TB)
| | - Brenda C Davis
- American College of Lifestyle Medicine, Chesterfield, MO, USA (BCD, KP, MCK)
| | | | - Trudy Gaillard
- Nicole Wertheim College of Nursing & Health Sciences, Florida International University, Miami, FL, USA (TG)
| | - Mahima Gulati
- Middlesex Health Multispecialty Group, Middletown, CT, USA (MG)
| | | | | | | | - Amy Rothberg
- Michigan Medicine, University of Michigan Health, Ann Arbor, MI, USA (AR)
| | - Deepa V Sannidhi
- University of California San Diego Department of Family Medicine and Public Health, La Jolla, CA, USA (DVS)
| | | | - Kaitlyn Pauly
- American College of Lifestyle Medicine, Chesterfield, MO, USA (BCD, KP, MCK)
| | - Micaela C Karlsen
- American College of Lifestyle Medicine, Chesterfield, MO, USA (BCD, KP, MCK)
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Abstract
Chronic diseases pose many challenges to health care providers and the health care system from a human capital, logistic, and financial perspective. To overcome these challenges, efficient and effective health care delivery models that address multiple chronic conditions need to be leveraged. Shared medical appointments are one potential solution to address these issues. This article offers a brief history of group visits and shared medical appointments and reviews the available data regarding their outcomes. It describes the benefits of using lifestyle medicine as the primary therapeutic modality within a shared medical appointment to treat, reverse, and prevent chronic disease. Key considerations and action steps for the implementation of lifestyle medicine shared medical appointments (LMSMAs) are outlined and the potential delivery of these services via telehealth is explored.
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Affiliation(s)
- Salvatore Lacagnina
- Concierge Lifestyle Medicine, Fort Myers, Florida (SL).,American College of Lifestyle Medicine, Chesterfield, Missouri (JT, KP, MK).,Nutrition Epidemiology and Data Science, Friedman School of Nutrition Science and Policy, Tufts University, Medford, Massachusetts (KC)
| | - Jean Tips
- Concierge Lifestyle Medicine, Fort Myers, Florida (SL).,American College of Lifestyle Medicine, Chesterfield, Missouri (JT, KP, MK).,Nutrition Epidemiology and Data Science, Friedman School of Nutrition Science and Policy, Tufts University, Medford, Massachusetts (KC)
| | - Kaitlyn Pauly
- Concierge Lifestyle Medicine, Fort Myers, Florida (SL).,American College of Lifestyle Medicine, Chesterfield, Missouri (JT, KP, MK).,Nutrition Epidemiology and Data Science, Friedman School of Nutrition Science and Policy, Tufts University, Medford, Massachusetts (KC)
| | - Kelly Cara
- Concierge Lifestyle Medicine, Fort Myers, Florida (SL).,American College of Lifestyle Medicine, Chesterfield, Missouri (JT, KP, MK).,Nutrition Epidemiology and Data Science, Friedman School of Nutrition Science and Policy, Tufts University, Medford, Massachusetts (KC)
| | - Micaela Karlsen
- Concierge Lifestyle Medicine, Fort Myers, Florida (SL).,American College of Lifestyle Medicine, Chesterfield, Missouri (JT, KP, MK).,Nutrition Epidemiology and Data Science, Friedman School of Nutrition Science and Policy, Tufts University, Medford, Massachusetts (KC)
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Affiliation(s)
- Dexter Shurney
- American College of Lifestyle Medicine (ACLM) and Zipongo, Inc, Grants Pass, OR, USA
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Johnson SS, Shurney D, Pauly K, Mauriello LM, Artz K, Hess A, Passaretti M, Coolbaugh S, Martin P, Classens K, Fox J, Kass A. Editor's Desk: Masterful Microbes: The Gut Microbiome and Food as Medicine. Am J Health Promot 2019; 33:820-834. [PMID: 31079468 DOI: 10.1177/0890117119845711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Abstract
ZusammenfassungDie Rolle des parietalen Kortex in der Ätiopathogenese der Schizophrenie ist ein noch weitgehend unerforschtes Gebiet. Zwar konnten strukturelle und funktionelle Auffälligkeiten in Studien mit schizophrenen Patienten in dieser Hirnregion nachgewiesen werden, jedoch fehlt bisher eine übergreifende Deutung der Ergebnisse. Ausgehend von neueren bildgebenden Befunden entwickeln wir Hypothesen zum Zusammenhang zwischen Parietalkortex und schizophrener Psychopathologie, wie Ich-Störungen und sozialen Defiziten.
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Zink M, Weyer S, Pauly K, Napp A, Dreher M, Leonhardt S, Marx N, Schauerte P, Mischke K. Bioelektrische Impedanzspektroskopie vor und nach Pleurapunktion. Pneumologie 2015. [DOI: 10.1055/s-0035-1544811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Krug A, Cabanis M, Pyka M, Pauly K, Kellermann T, Walter H, Wagner M, Landsberg M, Shah NJ, Winterer G, Wölwer W, Brinkmeyer J, Müller BW, Kärgel C, Wiedemann G, Herrlich J, Vogeley K, Schilbach L, Rapp A, Klingberg S, Kircher T. Attenuated prefrontal activation during decision-making under uncertainty in schizophrenia: a multi-center fMRI study. Schizophr Res 2014; 152:176-83. [PMID: 24325976 DOI: 10.1016/j.schres.2013.11.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 11/04/2013] [Accepted: 11/11/2013] [Indexed: 10/25/2022]
Abstract
Decisions are called decisions under uncertainty when either prior information is incomplete or the outcomes of the decision are unclear. Alterations in these processes related to decisions under uncertainty have been linked to delusions. In patients with schizophrenia, the underlying neural networks have only rarely been studied. We aimed to disentangle the neural correlates of decision-making and relate them to neuropsychological and psychopathological parameters in a large sample of patients with schizophrenia and healthy subjects. Fifty-seven patients and fifty-seven healthy volunteers from six centers had to either indicate via button-press from which of two bottles red or blue balls were drawn (decision-making under uncertainty condition), or indicate whether eight red balls had been presented (baseline condition) while BOLD signal was measured with fMRI. Patients based their decisions on less conclusive evidence and had decreased activations in the underlying neural network, comprising of medial and lateral frontal as well as parietal areas, as compared to healthy subjects. While current psychopathology was not correlated with brain activation, positive symptoms led to longer decision latencies in patients. These results suggest that decision-making under uncertainty in schizophrenia is affected by a complex interplay of aberrant neural activation. Furthermore, reduced neuropsychological functioning in patients was related to impaired decision-making and task performance was modulated by distinct positive symptoms.
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Affiliation(s)
- A Krug
- Department of Psychiatry and Psychotherapy, Philipps University, Marburg, Germany.
| | - M Cabanis
- Department of Psychiatry and Psychotherapy, Philipps University, Marburg, Germany
| | - M Pyka
- Department of Psychiatry and Psychotherapy, Philipps University, Marburg, Germany
| | - K Pauly
- Department of Psychiatry, Psychotherapy and Psychosomatic Medicine, Medical School, RWTH Aachen University, Aachen, Germany
| | - T Kellermann
- Department of Psychiatry, Psychotherapy and Psychosomatic Medicine, Medical School, RWTH Aachen University, Aachen, Germany
| | - H Walter
- Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Berlin, Germany
| | - M Wagner
- Department of Psychiatry and Psychotherapy, University of Bonn, Bonn, Germany
| | - M Landsberg
- Department of Psychiatry and Psychotherapy, University of Bonn, Bonn, Germany
| | - N J Shah
- Institute of Neuroscience and Medicine, Medical Imaging Physics (INM4), Research Centre Juelich, Germany; Department of Neurology, Faculty of Medicine, JARA, RWTH Aachen University, Aachen, Germany
| | - G Winterer
- Cologne Center for Genomics, University of Cologne, Köln, Germany
| | - W Wölwer
- Department of Psychiatry and Psychotherapy, Heinrich Heine University, Rhineland State Clinics for Psychiatry, Düsseldorf, Germany
| | - J Brinkmeyer
- Department of Psychiatry and Psychotherapy, Heinrich Heine University, Rhineland State Clinics for Psychiatry, Düsseldorf, Germany
| | - B W Müller
- LVR-Hospital Essen, Department of Psychiatry and Psychotherapy, Faculty of Medicine, University of Duisburg-Essen, Rhineland State Clinics for Psychiatry, Essen, Germany
| | - C Kärgel
- LVR-Hospital Essen, Department of Psychiatry and Psychotherapy, Faculty of Medicine, University of Duisburg-Essen, Rhineland State Clinics for Psychiatry, Essen, Germany
| | - G Wiedemann
- Clinic of Psychiatry and Psychotherapy, Clinical Center, Fulda, Germany
| | - J Herrlich
- Department of Psychiatry and Psychotherapy, Johann Wolfgang Goethe University, Frankfurt/Main, Germany
| | - K Vogeley
- Department of Psychiatry and Psychotherapy, University of Cologne, Köln, Germany; Institute for Neurosciences and Medicine, Cognitive Neuroscience (INM3), Research Center Juelich, Germany
| | - L Schilbach
- Department of Psychiatry and Psychotherapy, University of Cologne, Köln, Germany
| | - A Rapp
- Department of Psychiatry and Psychotherapy, Eberhard Karls University, Tübingen, Germany
| | - S Klingberg
- Department of Psychiatry and Psychotherapy, Eberhard Karls University, Tübingen, Germany
| | - T Kircher
- Department of Psychiatry and Psychotherapy, Philipps University, Marburg, Germany
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Moessnang C, Pauly K, Kellermann T, Krämer J, Finkelmeyer A, Hummel T, Siegel SJ, Schneider F, Habel U. The scent of salience--is there olfactory-trigeminal conditioning in humans? Neuroimage 2013; 77:93-104. [PMID: 23558094 DOI: 10.1016/j.neuroimage.2013.03.049] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 02/15/2013] [Accepted: 03/17/2013] [Indexed: 11/18/2022] Open
Abstract
Pavlovian fear conditioning has been thoroughly studied in the visual, auditory and somatosensory domain, but evidence is scarce with regard to the chemosensory modality. Under the assumption that Pavlovian conditioning relies on the supra-modal mechanism of salience attribution, the present study was set out to attest the existence of chemosensory aversive conditioning in humans as a specific instance of salience attribution. fMRI was performed in 29 healthy subjects during a differential aversive conditioning paradigm. Two odors (rose, vanillin) served as conditioned stimuli (CS), one of which (CS+) was intermittently coupled with intranasally administered CO2. On the neural level, a robust differential response to the CS+ emerged in frontal, temporal, occipito-parietal and subcortical brain regions, including the amygdala. These changes were paralleled by the development of a CS+-specific connectivity profile of the anterior midcingulate cortex (aMCC), which is a key structure for processing salience information in order to guide adaptive response selection. Increased coupling could be found between key nodes of the salience network (anterior insula, neo-cerebellum) and sensorimotor areas, representing putative input and output structures of the aMCC for exerting adaptive motor control. In contrast, behavioral and skin conductance responses did not show significant effects of conditioning, which has been attributed to contingency unawareness. These findings imply substantial similarities of conditioning involving chemosensory and other sensory modalities, and suggest that salience attribution and adaptive control represent a general, modality-independent principle underlying Pavlovian conditioning.
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Affiliation(s)
- C Moessnang
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Pauwelsstraße 30, Aachen, Germany.
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Bloom D, Chang Z, Pauly K, Kwun J, Fechner J, Hayes C, Samaniego M, Knechtle S. BAFF is increased in renal transplant patients following treatment with alemtuzumab. Am J Transplant 2009; 9:1835-45. [PMID: 19522878 PMCID: PMC4876605 DOI: 10.1111/j.1600-6143.2009.02710.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Alemtuzumab is a monoclonal antibody that depletes T and B cells and is used as induction therapy for renal transplant recipients. Without long-term calcineurin inhibitor (CNI) therapy, alemtuzumab-treated patients have a propensity to develop alloantibody and may undergo antibody-mediated rejection (AMR). In pursuit of a mechanistic explanation, we analyzed peripheral B cells and serum of these patients for BAFF (Blys) and BAFF-R, factors known to be integral for B-cell activation, survival, and homeostasis. Serum BAFF levels of 22/24 alemtuzumab-treated patients were above normal range, with average levels of 1967 pg/mL compared to 775 pg/mL in healthy controls (p = 0.006). BAFF remained elevated 2 years posttransplant in 78% of these patients. BAFF-R on CD19(+) B cells was significantly downregulated, suggesting ligand/receptor engagement. BAFF mRNA expression was increased 2-7-fold in CD14(+) cells of depleted patients, possibly linking monocytes to the BAFF dysregulation. Addition of recombinant BAFF to mixed lymphocyte cultures increased B-cell activation to alloantigen, as measured by CD25 and CD69 coexpression on CD19(+) cells. Of note, addition of sirolimus (SRL) augmented BAFF-enhanced B-cell activation whereas CNIs blocked it. These data suggest associations between BAFF/BAFF-R and AMR in alemtuzumab-treated patients.
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Affiliation(s)
- D. Bloom
- Department of Surgery, Division of Solid Organ Transplantation, University of Wisconsin-Madison School of Public Health and Medicine, Madison, WI,Corresponding author: Debra Bloom,
| | - Z. Chang
- Department of Surgery, Division of Solid Organ Transplantation, University of Wisconsin-Madison School of Public Health and Medicine, Madison, WI
| | - K. Pauly
- Department of Surgery, Division of Solid Organ Transplantation, University of Wisconsin-Madison School of Public Health and Medicine, Madison, WI
| | - J. Kwun
- Department of Surgery, Division of Transplant, Emory School of Medicine, Atlanta, GA
| | - J. Fechner
- Department of Surgery, Division of Solid Organ Transplantation, University of Wisconsin-Madison School of Public Health and Medicine, Madison, WI
| | - C. Hayes
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI
| | - M. Samaniego
- Department of Medicine, Nephrology Section, University of Wisconsin-Madison School of Public Health and Medicine, Madison, WI
| | - S. Knechtle
- Department of Surgery, Division of Transplant, Emory School of Medicine, Atlanta, GA
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Seiferth NY, Pauly K, Habel U, Kellermann T, Shah NJ, Ruhrmann S, Klosterkoetter J, Schneider F, Kircher T. Neuronal processing of facial emotions in subjects at risk for psychosis. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71345-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Glatt H, Pauly K, Czich A, Falany JL, Falany CN. Activation of benzylic alcohols to mutagens by rat and human sulfotransferases expressed in Escherichia coli. Eur J Pharmacol 1995; 293:173-81. [PMID: 7589232 DOI: 10.1016/0926-6917(95)90002-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Human hydroxysteroid sulfotransferase, human phenol-sulfating form of phenol sulfotransferase, rat hydroxysteroid sulfotransferase a and rat phenol sulfotransferase IV were expressed in Escherichia coli. Cytosol preparations of transformed bacteria were used as activating systems in mutagenicity tests with Salmonella typhimurium TA98. All test compounds, 1-hydroxymethylpyrene, 2-hydroxymethylpyrene, 1-(1-pyrenyl)ethanol, 9-hydroxymethylanthracene, 7-hydroxymethyl-12-methylbenz[a]anthracene and 4H-cyclopenta[def]chrysen-4-ol, were activated by both hydroxysteroid sulfotransferases investigated. However, 1-(1-pyrenyl)ethanol was 67-fold more efficiently activated by the human enzyme, whereas 7-hydroxymethyl-12-methylbenz[a]anthracene was 27-fold more efficiently activated by the rat enzyme. The phenol sulfotransferases showed relatively low activities with the benzylic alcohols investigated. The only exception was 4H-cyclopenta[def]chrysen-4-ol, which was activated efficiently by rat phenol sulfotransferase IV. We had previously tested the ability of rat and human hepatic cytosol preparations to activate the same compounds. The results of a statistical analysis suggest that the activities of human hydroxysteroid sulfotransferase, rat hydroxysteroid sulfotransferase a and phenol sulfotransferase IV can account for a substantial portion of the activation of benzylic alcohols in human, female rat and male rat liver, respectively.
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Affiliation(s)
- H Glatt
- Deutsches Institut für Ernährungsforschung, Potsdam-Rehbrücke, Germany
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Glatt H, Pauly K, Frank H, Seidel A, Oesch F, Harvey RG, Werle-Schneider G. Substance-dependent sex differences in the activation of benzylic alcohols to mutagens by hepatic sulfotransferases of the rat. Carcinogenesis 1994; 15:2605-11. [PMID: 7955113 DOI: 10.1093/carcin/15.11.2605] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Six primary and 10 secondary benzylic alcohols derived from polycyclic aromatic hydrocarbons were tested for mutagenicity in Salmonella typhimurium TA98 in the presence of varying amounts of hepatic cytosol from adult male and female rats and 3'-phosphoadenosine-5'-phosphosulfate, the cofactor for sulfotransferases. With the exception of 1-(9-anthryl)ethanol, 4H-cyclopenta[def]-phenanthren-4-ol and 10-hydroxy-7,8,9,10-tetrahydrobenzo[a]pyrene, all the benzylic alcohols were activated to mutagens. For 1-(1-pyrenyl)ethanol (1-HEP), 1-(2-pyrenyl)ethanol (2-HEP), 6-hydroxymethylanthanthrene (6-HMAA), 2-hydroxymethylpyrene (2-HMP), 10H-indeno[1,2,7,7a-bcd]pyren-10-ol (OH-IP), 3-hydroxy-3,4-dihydrocyclopenta[cd]pyrene (3-OH-H2-CPcdP) and 1-(6-benzo[a]pyrenyl)ethanol (6-HEBP), this is the first observation of a mutagenic activity. The primary alcohols 1-hydroxymethylpyrene, 2-HMP, 9-hydroxymethylanthracene, 7-hydroxymethyl-12-methylbenz[a]anthracene and 6-hydroxymethylbenzo[a]pyrene, as well as the secondary alcohols 1-HEP and 3-OH-H2-CPcdP, were more efficiently activated by hepatic cytosol from females than by preparations from males (2.6- to 8-fold). A further compound, 6-HEBP showed significant, but relatively weak, effects in the presence of cytosol from females, whereas it was inactive in the presence of hepatic cytosol from males. The reverse sex difference was observed in the activation of 4H-cyclo-penta[def]chrysen-4-ol, the activity of cytosol from males amounting to about four times that from females. Four other compounds, 2-HEP, 7-hydroxy-7,8,9,10-tetrahydrobenzo[a]pyrene, 6-HMAA and OH-IP, were activated with similar efficiency by hepatic cytosol from both sexes (< two-fold differences). The study indicates that different sulfotransferases are involved in the bioactivation of benzylic alcohols, including forms preferentially expressed in females as well as forms preferentially expressed in males, and that these enzymes qualitatively differ in their substrate tolerance for benzylic alcohols.
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Affiliation(s)
- H Glatt
- Deutsches Institut für Ernährungsforschung, Potsdam-Rehbrücke, Germany
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Glatt H, Pauly K, Piée-Staffa A, Seidel A, Hornhardt S, Czich A. Activation of promutagens by endogenous and heterologous sulfotransferases expressed in continuous cell cultures. Toxicol Lett 1994; 72:13-21. [PMID: 8202924 DOI: 10.1016/0378-4274(94)90005-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Various environmental chemicals are metabolised to chemically reactive sulfuric acid esters, which may covalently bind to cellular macromolecules and induce mutations and tumours. This activation pathway is usually not taken into account in external xenobiotic-metabolising systems used in short-term tests. We therefore analysed the abilities of cytosols from mammalian cell lines to activate benzylic alcohols (1-hydroxymethylpyrene and 9-hydroxymethylanthracene) to mutagens detectable in Salmonella typhimurium TA98. No activation was observed in cell lines which are commonly used in mutagenicity and cell transformation assays, and only low activities were found in epithelial cell lines in culture. We have therefore constructed Chinese hamster V79-derived cell lines which stably express a heterologous sulfotransferase, rat hydroxysteroid sulfotransferase a. Cytosol of these cells effectively activated 1-hydroxymethylpyrene and 9-hydroxymethylanthracene to mutagens detected in S. typhimurium. The hepatocarcinogen 6-hydroxymethylbenzo[a]pyrene induced gene mutations in sulfotransferase-expressing V79-derived cells, whereas it elicited only marginal effects in sulfotransferase-deficient control cells. The new cell lines may allow the detection of novel classes of mutagens, since some externally generated reactive sulfuric acid esters may not readily penetrate target cells due to their short life span and their ionization.
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Affiliation(s)
- H Glatt
- Department of Toxicology, University of Mainz, Germany
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14
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Glatt H, Piée A, Pauly K, Steinbrecher T, Schrode R, Oesch F, Seidel A. Fjord- and bay-region diol-epoxides investigated for stability, SOS induction in Escherichia coli, and mutagenicity in Salmonella typhimurium and mammalian cells. Cancer Res 1991; 51:1659-67. [PMID: 1900215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The fjord-region diol-epoxides of benzo(c)phenanthrene combine high mutagenic and carcinogenic activity with low chemical reactivity. To study whether this is a unique property of these compounds or a more general characteristic of fjord-region diol-epoxides, we have synthesized the anti- and syn-diastereomers of r-9,t-10-dihydroxy-11,12-oxy-9,10,11,12-tetrahydrobenzo(c)chrysene and r-11-t-12-dihydroxy-13,14-oxy-11,12,13,14-tetrahydrobenzo(g)chrysene. These compounds as well as the anti- and syn-diastereomers of the fjord-region diol-epoxides of benzo(c)phenanthrene and of the bay-region diol-epoxides of phenanthrene, chrysene, and benzo(a)pyrene were investigated for their half-lives in a physiological buffer, for their mutagenicity in Salmonella typhimurium (reversion of the his- strains TA97, TA98, TA100, and TA104), for induction of SOS response in Escherichia coli (SOS chromotest in strain PQ37) and for their mutagenicity in V79 Chinese hamster cells (acquisition of resistance to 6-thioguanine). All six of the investigated fjord-region diol-epoxides were more stable in physiological buffer at 37 degrees C (t1/2 greater than 2 h) than the six bay-region diol-epoxides (t1/2 = 0.011 to 1.2 h). The half-lives correlated negatively with the calculated delta Edeloc values for the formation of the benzylic carbocations, and were consistently shorter for the syn- than for the corresponding anti-diastereomer. All fjord-region diol-epoxides showed extraordinarily high activity in all six genotoxicity assays used. In mammalian cells, the anti-diol-epoxide of benzo(c)chrysene was 8.6 and 12 times more active than the anti-diol-epoxides of benzo(c)phenanthrene and benzo(a)pyrene, respectively, which were the most potent mutagens among the reference compounds. The other three newly available fjord-region diol-epoxides were also markedly more mutagenic in mammalian cells than the reference compounds. Whereas the syn-diastereomers of the simple bay-region diolepoxides were clearly less mutagenic in mammalian cells than the corresponding anti-diastereomers, the differences in potency between diastereomers were small for the fjord-region diol-epoxides. In conclusion, the diol-epoxides of benzo(c)phenanthrene are not unique in their high biological activities. The two newly available diastereomeric pairs of fjord-region diol-epoxides of benzo(g)- and benzo(c)chrysene proved to be even more active. For one of them, the diol-epoxides of benzo(g)chrysene, the delta Edeloc value for the formation of the benzylic carbocation is lower than for the benzo(c)phenanthrene diol-epoxides, for the other it is higher.
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Affiliation(s)
- H Glatt
- Department of Toxicology, University of Mainz, Federal Republic of Germany
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