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Oshima K, Siddiqui N, Orfila JE, Carter D, Laing J, Han X, Zakharevich I, Iozzo RV, Ghasabyan A, Moore H, Zhang F, Linhardt RJ, Moore EE, Quillinan N, Schmidt EP, Herson PS, Hippensteel JA. A role for decorin in improving motor deficits after traumatic brain injury. Matrix Biol 2024; 125:88-99. [PMID: 38135163 PMCID: PMC10922985 DOI: 10.1016/j.matbio.2023.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 12/24/2023]
Abstract
Traumatic brain injury (TBI) is the leading cause of death and disability due to injury worldwide. Extracellular matrix (ECM) remodeling is known to significantly contribute to TBI pathophysiology. Glycosaminoglycans, which are long-chain, variably sulfated polysaccharides abundant within the ECM, have previously been shown to be substantially altered after TBI. In this study, we sought to delineate the dynamics of glycosaminoglycan alterations after TBI and discover the precise biologic processes responsible for observed glycosaminoglycan changes after injury. We performed state-of-the art mass spectrometry on brain tissues isolated from mice after TBI or craniotomy-alone. We observed dynamic changes in glycosaminoglycans at Day 1 and 7 post-TBI, with heparan sulfate, chondroitin sulfate, and hyaluronan remaining significantly increased after a week vis-à-vis craniotomy-alone tissues. We did not observe appreciable changes in circulating glycosaminoglycans in mice after experimental TBI compared to craniotomy-alone nor in patients with TBI and severe polytrauma compared to control patients with mild injuries, suggesting increases in injury site glycosaminoglycans are driven by local synthesis. We subsequently performed an unbiased whole genome transcriptomics analysis on mouse brain tissues 7 days post-TBI and discovered a significant induction of hyaluronan synthase 2, glypican-3, and decorin. The functional role of decorin after injury was further examined through multimodal behavioral testing comparing wild-type and Dcn-/- mice. We discovered that genetic ablation of Dcn led to an overall negative effect of TBI on function, exacerbating motor impairments after TBI. Collectively, our results provide a spatiotemporal characterization of post-TBI glycosaminoglycan alterations in the brain ECM and support an important adaptive role for decorin upregulation after TBI.
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Affiliation(s)
- Kaori Oshima
- Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Noah Siddiqui
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - James E Orfila
- Department of Neurosurgery, The Ohio State University, College of Medicine, Columbus, Ohio, USA
| | - Danelle Carter
- Department of Neurology, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Justin Laing
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Xiaorui Han
- Departments of Chemistry and Chemical Biology, Chemical and Biological Engineering, and Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA; Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia
| | - Igor Zakharevich
- Department of Biochemistry, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Renato V Iozzo
- Department of Pathology and Genomic Medicine and the Translational Cellular Oncology Program, Sidney Kimmel Cancer Center, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Arsen Ghasabyan
- Department of Surgery, Ernest E. Moore Shock Trauma Center at Denver Health, University of Colorado, Denver, Colorado, USA
| | - Hunter Moore
- Department of Surgery, Ernest E. Moore Shock Trauma Center at Denver Health, University of Colorado, Denver, Colorado, USA
| | - Fuming Zhang
- Departments of Chemistry and Chemical Biology, Chemical and Biological Engineering, and Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Robert J Linhardt
- Departments of Chemistry and Chemical Biology, Chemical and Biological Engineering, and Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Ernest E Moore
- Department of Surgery, Ernest E. Moore Shock Trauma Center at Denver Health, University of Colorado, Denver, Colorado, USA
| | - Nidia Quillinan
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Eric P Schmidt
- Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Paco S Herson
- Department of Neurosurgery, The Ohio State University, College of Medicine, Columbus, Ohio, USA
| | - Joseph A Hippensteel
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
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2
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Langouët-Astrié C, Oshima K, McMurtry SA, Yang Y, Kwiecinski JM, LaRivière WB, Kavanaugh JS, Zakharevich I, Hansen KC, Shi D, Zhang F, Boguslawski KM, Perelman SS, Su G, Torres VJ, Liu J, Horswill AR, Schmidt EP. The influenza-injured lung microenvironment promotes MRSA virulence, contributing to severe secondary bacterial pneumonia. Cell Rep 2022; 41:111721. [PMID: 36450248 PMCID: PMC10082619 DOI: 10.1016/j.celrep.2022.111721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 10/12/2022] [Accepted: 11/03/2022] [Indexed: 12/03/2022] Open
Abstract
Influenza infection is substantially worsened by the onset of secondary pneumonia caused by bacteria, such as methicillin-resistant Staphylococcus aureus (MRSA). The bidirectional interaction between the influenza-injured lung microenvironment and MRSA is poorly understood. By conditioning MRSA ex vivo in bronchoalveolar lavage fluid collected from mice at various time points of influenza infection, we found that the influenza-injured lung microenvironment dynamically induces MRSA to increase cytotoxin expression while decreasing metabolic pathways. LukAB, a SaeRS two-component system-dependent cytotoxin, is particularly important to the severity of post-influenza MRSA pneumonia. LukAB's activity is likely shaped by the post-influenza lung microenvironment, as LukAB binds to (and is activated by) heparan sulfate (HS) oligosaccharide sequences shed from the epithelial glycocalyx after influenza. Our findings indicate that post-influenza MRSA pneumonia is shaped by bidirectional host-pathogen interactions: host injury triggers changes in bacterial expression of toxins, the activity of which may be shaped by host-derived HS fragments.
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Affiliation(s)
| | - Kaori Oshima
- Division of Pulmonary Sciences and Critical Care, University of Colorado Denver, Aurora, CO 80045, USA
| | - Sarah A McMurtry
- Division of Pulmonary Sciences and Critical Care, University of Colorado Denver, Aurora, CO 80045, USA
| | - Yimu Yang
- Division of Pulmonary Sciences and Critical Care, University of Colorado Denver, Aurora, CO 80045, USA
| | - Jakub M Kwiecinski
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045, USA; Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow 30387, Poland
| | - Wells B LaRivière
- Division of Pulmonary Sciences and Critical Care, University of Colorado Denver, Aurora, CO 80045, USA; Medical Scientist Training Program, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Jeffrey S Kavanaugh
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Igor Zakharevich
- Department of Biochemistry and Molecular Genetics, University of Colorado, Aurora, CO 80045, USA
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, University of Colorado, Aurora, CO 80045, USA
| | - Deling Shi
- Department of Chemistry, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Fuming Zhang
- Department of Chemistry, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Kristina M Boguslawski
- Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA
| | - Sofya S Perelman
- Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA
| | - Gouwei Su
- University of North Carolina Eshelman School of Pharmacy, Chapel Hill, NC 27599, USA
| | - Victor J Torres
- Department of Microbiology, New York University School of Medicine, New York, NY 10016, USA
| | - Jian Liu
- University of North Carolina Eshelman School of Pharmacy, Chapel Hill, NC 27599, USA
| | - Alexander R Horswill
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Eric P Schmidt
- Division of Pulmonary Sciences and Critical Care, University of Colorado Denver, Aurora, CO 80045, USA; Department of Medicine, Massachusetts General Hospital, Boston, MA 02115, USA
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3
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Gerona RR, Reiter JL, Zakharevich I, Proctor C, Ying J, Mesnage R, Antoniou M, Winchester PD. Glyphosate exposure in early pregnancy and reduced fetal growth: a prospective observational study of high-risk pregnancies. Environ Health 2022; 21:95. [PMID: 36221133 PMCID: PMC9552485 DOI: 10.1186/s12940-022-00906-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 09/08/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Prenatal glyphosate (GLY) exposure is associated with adverse reproductive outcomes in animal studies. Little is known about the effects of GLY exposure during pregnancy in the human population. This study aims to establish baseline urine GLY levels in a high-risk and racially diverse pregnancy cohort and to assess the relationship between prenatal GLY exposure and fetal development and birth outcomes. METHODS Random first trimester urine specimens were collected from high risk pregnant women between 2013 and 2016 as part of the Indiana Pregnancy Environmental Exposures Study (PEES). Demographic and clinical data were abstracted from mother and infant medical records. Urine glyphosate levels were measured as a proxy for GLY exposure and quantified using liquid chromatography-tandem mass spectrometry. Primary outcome variables included gestation-adjusted birth weight percentile (BWT%ile) and neonatal intensive care unit (NICU) admission. Relationships between primary outcome variables and GLY exposure were assessed using univariate and multivariate linear and logistic regression models. RESULTS Urine GLY levels above the limit of detection (0.1 ng/mL) were found in 186 of 187 (99%) pregnant women. Further analyses were limited to 155 pregnant women with singleton live births. The mean age of participants was 29 years, and the majority were non-Hispanic white (70%) or non-Hispanic Black (21%). The mean (± SD) urine GLY level was 3.33 ± 1.67 ng/mL. Newborn BWT%iles were negatively related to GLY (adjusted slope ± SE = -0.032 + 0.014, p = 0.023). Infants born to women living outside of Indiana's large central metropolitan area were more likely to have a lower BWT%ile associated with mother's first trimester GLY levels (slope ± SE = -0.064 ± 0.024, p = 0.007). The adjusted odds ratio for NICU admission and maternal GLY levels was 1.16 (95% CI: 0.90, 1.67, p = 0.233). CONCLUSION GLY was found in 99% of pregnant women in this Midwestern cohort. Higher maternal GLY levels in the first trimester were associated with lower BWT%iles and higher NICU admission risk. The results warrant further investigation on the effects of GLY exposure in human pregnancies in larger population studies.
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Affiliation(s)
- Roy R. Gerona
- Department of Gynecology, Obstetrics and Reproductive Sciences, University of California San Francisco, 2340 Sutter St S271, 94115 San Francisco, CA USA
| | - Jill L. Reiter
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, 410 W. 10th Street, Suite 5000, 46202 Indianapolis, IN USA
| | - Igor Zakharevich
- Department of Gynecology, Obstetrics and Reproductive Sciences, University of California San Francisco, 2340 Sutter St S271, 94115 San Francisco, CA USA
| | - Cathy Proctor
- Department of Pediatrics/Neonatology, Indiana University School of Medicine, NICU Satellite Franciscan Health, 8111 South Emerson Avenue, 46237 Indianapolis, IN USA
| | - Jun Ying
- Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, 4301 West Markham Street RAHN 3212, 72205 Little Rock, Arkansas, USA
| | - Robin Mesnage
- Department of Medical and Molecular Genetics, King’s College London School of Medicine, Guy’s Hospital, Great Maze Pond, 8th Floor, Tower Wing, SE1 9RT London, UK
| | - Michael Antoniou
- Department of Medical and Molecular Genetics, King’s College London School of Medicine, Guy’s Hospital, Great Maze Pond, 8th Floor, Tower Wing, SE1 9RT London, UK
| | - Paul D. Winchester
- Department of Pediatrics/Neonatology, Indiana University School of Medicine, NICU Satellite Franciscan Health, 8111 South Emerson Avenue, 46237 Indianapolis, IN USA
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4
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Bauer C, Piani F, Banks M, Ordoñez FA, de Lucas-Collantes C, Oshima K, Schmidt EP, Zakharevich I, Segarra A, Martinez C, Roncal-Jimenez C, Satchell SC, Bjornstad P, Lucia MS, Blaine J, Thurman JM, Johnson RJ, Cara-Fuentes G. Minimal Change Disease Is Associated With Endothelial Glycocalyx Degradation and Endothelial Activation. Kidney Int Rep 2022; 7:797-809. [PMID: 35497798 PMCID: PMC9039905 DOI: 10.1016/j.ekir.2021.11.037] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 11/03/2021] [Accepted: 11/29/2021] [Indexed: 01/05/2023] Open
Abstract
Introduction Minimal change disease (MCD) is considered a podocyte disorder triggered by unknown circulating factors. Here, we hypothesized that the endothelial cell (EC) is also involved in MCD. Methods We studied 45 children with idiopathic nephrotic syndrome (44 had steroid sensitive nephrotic syndrome [SSNS], and 12 had biopsy-proven MCD), 21 adults with MCD, and 38 healthy controls (30 children, 8 adults). In circulation, we measured products of endothelial glycocalyx (EG) degradation (syndecan-1, heparan sulfate [HS] fragments), HS proteoglycan cleaving enzymes (matrix metalloprotease-2 [MMP-2], heparanase activity), and markers of endothelial activation (von Willebrand factor [vWF], thrombomodulin) by enzyme-linked immunosorbent assay (ELISA) and mass spectrometry. In human kidney tissue, we assessed glomerular EC (GEnC) activation by immunofluorescence of caveolin-1 (n = 11 MCD, n = 5 controls). In vitro, we cultured immortalized human GEnC with sera from control subjects and patients with MCD/SSNS sera in relapse (n = 5 per group) and performed Western blotting of thrombomodulin of cell lysates as surrogate marker of endothelial activation. Results In circulation, median concentrations of all endothelial markers were higher in patients with active disease compared with controls and remained high in some patients during remission. In the MCD glomerulus, caveolin-1 expression was higher, in an endothelial-specific pattern, compared with controls. In cultured human GEnC, sera from children with MCD/SSNS in relapse increased thrombomodulin expression compared with control sera. Conclusion Our data show that alterations involving the systemic and glomerular endothelium are nearly universal in patients with MCD and SSNS, and that GEnC can be directly activated by circulating factors present in the MCD/SSNS sera during relapse.
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Affiliation(s)
- Colin Bauer
- Section of Pediatric Nephrology, Department of Pediatrics, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Federica Piani
- Section of Pediatric Nephrology, Department of Pediatrics, Children's Hospital Colorado, Aurora, Colorado, USA
- Department of Medicine and Surgery Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Mindy Banks
- Division of Pediatric Nephrology, Rocky Mountain Children's Hospital, Denver, Colorado, USA
| | - Flor A Ordoñez
- Division of Pediatric Nephrology, Hospital Universitario Central de Asturias, Oviedo, Spain
| | | | - Kaori Oshima
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Eric P Schmidt
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Igor Zakharevich
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Alfons Segarra
- Department of Nephrology, Hospital Universitario Arnau de Vilanova, Lleida, Spain
- Lleida Institute for Biomedical Research Dr. Pifarré Foundation, Lleida, Spain
- Division of Nephrology, Hospital General Vall d'Hebron, Barcelona, Spain
| | - Cristina Martinez
- Lleida Institute for Biomedical Research Dr. Pifarré Foundation, Lleida, Spain
| | - Carlos Roncal-Jimenez
- Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | | | - Petter Bjornstad
- Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- Department of Pediatrics, Section of Pediatric Endocrinology, Children's Hospital Colorado and University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Marshall Scott Lucia
- Department of Pathology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Judith Blaine
- Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Joshua M Thurman
- Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Richard J Johnson
- Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Gabriel Cara-Fuentes
- Section of Pediatric Nephrology, Department of Pediatrics, Children's Hospital Colorado, Aurora, Colorado, USA
- Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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5
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Rizzo AN, Haeger SM, Oshima K, Yang Y, Wallbank AM, Jin Y, Lettau M, McCaig LA, Wickersham NE, McNeil JB, Zakharevich I, McMurtry SA, Langouët-Astrié CJ, Kopf KW, Voelker DR, Hansen KC, Shaver CM, Kerchberger VE, Peterson RA, Kuebler WM, Ochs M, Veldhuizen RA, Smith BJ, Ware LB, Bastarache JA, Schmidt EP. Alveolar epithelial glycocalyx degradation mediates surfactant dysfunction and contributes to acute respiratory distress syndrome. JCI Insight 2022; 7:154573. [PMID: 34874923 PMCID: PMC8855818 DOI: 10.1172/jci.insight.154573] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 12/03/2021] [Indexed: 12/03/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a common cause of respiratory failure yet has few pharmacologic therapies, reflecting the mechanistic heterogeneity of lung injury. We hypothesized that damage to the alveolar epithelial glycocalyx, a layer of glycosaminoglycans interposed between the epithelium and surfactant, contributes to lung injury in patients with ARDS. Using mass spectrometry of airspace fluid noninvasively collected from mechanically ventilated patients, we found that airspace glycosaminoglycan shedding (an index of glycocalyx degradation) occurred predominantly in patients with direct lung injury and was associated with duration of mechanical ventilation. Male patients had increased shedding, which correlated with airspace concentrations of matrix metalloproteinases. Selective epithelial glycocalyx degradation in mice was sufficient to induce surfactant dysfunction, a key characteristic of ARDS, leading to microatelectasis and decreased lung compliance. Rapid colorimetric quantification of airspace glycosaminoglycans was feasible and could provide point-of-care prognostic information to clinicians and/or be used for predictive enrichment in clinical trials.
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Affiliation(s)
- Alicia N. Rizzo
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine
| | - Sarah M. Haeger
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine
| | - Kaori Oshima
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine
| | - Yimu Yang
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine
| | | | - Ying Jin
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine,,Department of Biostatistics and Informatics, School of Public Health, University of Colorado, Aurora, Colorado, USA
| | - Marie Lettau
- Institute of Functional Anatomy, Charité-Universitätsmedizin, Berlin, Germany
| | - Lynda A. McCaig
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada
| | - Nancy E. Wickersham
- Department of Medicine and Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee, USA
| | - J. Brennan McNeil
- Department of Medicine and Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee, USA
| | - Igor Zakharevich
- Department of Biochemistry and Molecular Genetics, University of Colorado, Aurora, Colorado, USA
| | - Sarah A. McMurtry
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine
| | | | - Katrina W. Kopf
- Department of Medicine, National Jewish Health, Denver, Colorado, USA
| | - Dennis R. Voelker
- Department of Medicine, National Jewish Health, Denver, Colorado, USA
| | - Kirk C. Hansen
- Department of Biochemistry and Molecular Genetics, University of Colorado, Aurora, Colorado, USA
| | - Ciara M. Shaver
- Department of Medicine and Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee, USA
| | - V. Eric Kerchberger
- Department of Medicine and Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee, USA
| | - Ryan A. Peterson
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine,,Department of Biostatistics and Informatics, School of Public Health, University of Colorado, Aurora, Colorado, USA
| | | | - Matthias Ochs
- Institute of Functional Anatomy, Charité-Universitätsmedizin, Berlin, Germany
| | - Ruud A.W. Veldhuizen
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada
| | - Bradford J. Smith
- Department of Bioengineering, and,Division of Pulmonary and Sleep Medicine, Department of Pediatrics, University of Colorado, Aurora, Colorado, USA
| | - Lorraine B. Ware
- Department of Medicine and Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee, USA
| | - Julie A. Bastarache
- Department of Medicine and Department of Pathology, Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee, USA
| | - Eric P. Schmidt
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine,,Department of Medicine, Denver Health Medical Center, Denver, Colorado, USA
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6
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Velarde MC, Chan AFO, Sajo MEJV, Zakharevich I, Melamed J, Uy GLB, Teves JMY, Corachea AJM, Valparaiso AP, Macalindong SS, Cabaluna ND, Dofitas RB, Giudice LC, Gerona RR. Elevated levels of perfluoroalkyl substances in breast cancer patients within the Greater Manila Area. Chemosphere 2022; 286:131545. [PMID: 34293563 DOI: 10.1016/j.chemosphere.2021.131545] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 07/06/2021] [Accepted: 07/10/2021] [Indexed: 06/13/2023]
Abstract
Several studies have reported exposure of humans to various endocrine disrupting chemicals (EDCs) worldwide. However, there is a lack of data regarding EDC exposures in humans living in Southeast Asian countries, such as the Philippines. Hence, this study measured levels of 41 EDCs in women residing in the Greater Manila Area, home to the second largest city in Southeast Asia. Urine samples from women with versus without breast cancer were analyzed for 11 phthalate metabolites, 8 environmental phenols, and 10 bisphenols, while serum samples were analyzed for 12 perfluoroalkyl substances (PFAS). Out of the four groups of EDCs analyzed, PFAS were significantly associated with breast cancer (adjusted OR = 13.63, 95% CI: 3.24-94.88 p-trend = 0.001 for PFDoA; adjusted OR = 9.26, 95% CI 2.54-45.10, p-trend = 0.002 for PFDA; and adjusted OR = 2.66, 95% CI: 0.95-7.66, p-trend = 0.004 for PFHxA). Long-chain PFAS levels were positively correlated with age and were significantly higher in women from Region IV-A, a heavily industrialized region, than from the National Capital Region. Overall, this study showed baseline information regarding the level of EDCs in Filipinas, providing a glimpse of EDC exposure in women living in a megalopolis city in Southeast Asia.
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Affiliation(s)
- Michael C Velarde
- Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, Philippines.
| | - Alison Faye O Chan
- Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, Philippines
| | - Ma Easter Joy V Sajo
- Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, Philippines; Department of Biology, College of Science, University of the Philippines Baguio, Baguio City, Philippines
| | - Igor Zakharevich
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Jonathan Melamed
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Gemma Leonora B Uy
- Department of Surgery, Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Joji Marie Y Teves
- Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, Philippines
| | - Allen Joy M Corachea
- Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, Philippines
| | - Apple P Valparaiso
- Department of Surgery, Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Shiela S Macalindong
- Department of Surgery, Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Nelson D Cabaluna
- Department of Surgery, Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Rodney B Dofitas
- Department of Surgery, Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Linda C Giudice
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
| | - Roy R Gerona
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA, USA
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7
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Cohen PA, Avula B, Wang YH, Zakharevich I, Khan I. Five Unapproved Drugs Found in Cognitive Enhancement Supplements. Neurol Clin Pract 2021; 11:e303-e307. [PMID: 34484905 DOI: 10.1212/cpj.0000000000000960] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 07/23/2020] [Indexed: 11/15/2022]
Abstract
Objective To identify the presence of unapproved pharmaceutical drugs in over-the-counter dietary supplements marketed to improve memory and cognitive function. Methods Supplements were identified by searching 2 supplement databases for products labeled as containing omberacetam, aniracetam, phenylpiracetam, or oxiracetam, 4 drugs not approved for human use in the United States. Products were purchased online and analyzed using nontargeted liquid chromatography-quadrupole time-of-flight mass spectrometry methods. Results In the 10 products tested, omberacetam and aniracetam were detected along with 3 additional unapproved drugs (i.e., phenibut, vinpocetine and picamilon). By consuming recommended serving sizes, consumers could be exposed to pharmaceutical-level dosages of drugs including a maximum of 40.6 ± 0.4 mg omberacetam (typical pharmacologic dose of 10 mg), 502 ± 0.8 mg of aniracetam (typical pharmacologic dose 200-750 mg), 15.4 ± 0.3 mg of phenibut (typical pharmacologic dose 250-500 mg), 4.3 ± 0.1 mg of vinpocetine (typical pharmacologic dose 5-40 mg), and 90.1 ± 0.7 mg of picamilon (typical pharmacologic dose 50-200 mg). Several detected drugs were not declared on the label, and several declared drugs were not detected in the products. For those products with drug quantities provided on the labels, 75% (9/12) of declared quantities were inaccurate. Consumers could be exposed to up to four-fold greater than pharmaceutical dosages and as many as 4 unapproved drugs when using individual products. Conclusions Over-the-counter cognitive enhancement supplements may contain multiple unapproved drugs. The health effects of consuming untested combinations of unapproved drugs at unpredictable dosages without clinician oversight in supplements are unknown.
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Affiliation(s)
- Pieter A Cohen
- Department of Medicine (PAC), Cambridge Health Alliance, Somerville, MA, Harvard Medical School, Boston, MA; National Center for Natural Products Research (BA, YHW, IK), School of Pharmacy, University of Mississippi, University, MS; and Department of Biochemistry and Molecular Genetics (IZ), University of Colorado Denver-Anschutz Medical Campus, Aurora
| | - Bharathi Avula
- Department of Medicine (PAC), Cambridge Health Alliance, Somerville, MA, Harvard Medical School, Boston, MA; National Center for Natural Products Research (BA, YHW, IK), School of Pharmacy, University of Mississippi, University, MS; and Department of Biochemistry and Molecular Genetics (IZ), University of Colorado Denver-Anschutz Medical Campus, Aurora
| | - Yan Hong Wang
- Department of Medicine (PAC), Cambridge Health Alliance, Somerville, MA, Harvard Medical School, Boston, MA; National Center for Natural Products Research (BA, YHW, IK), School of Pharmacy, University of Mississippi, University, MS; and Department of Biochemistry and Molecular Genetics (IZ), University of Colorado Denver-Anschutz Medical Campus, Aurora
| | - Igor Zakharevich
- Department of Medicine (PAC), Cambridge Health Alliance, Somerville, MA, Harvard Medical School, Boston, MA; National Center for Natural Products Research (BA, YHW, IK), School of Pharmacy, University of Mississippi, University, MS; and Department of Biochemistry and Molecular Genetics (IZ), University of Colorado Denver-Anschutz Medical Campus, Aurora
| | - Ikhlas Khan
- Department of Medicine (PAC), Cambridge Health Alliance, Somerville, MA, Harvard Medical School, Boston, MA; National Center for Natural Products Research (BA, YHW, IK), School of Pharmacy, University of Mississippi, University, MS; and Department of Biochemistry and Molecular Genetics (IZ), University of Colorado Denver-Anschutz Medical Campus, Aurora
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8
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Varshavsky JR, Robinson JF, Zhou Y, Puckett KA, Kwan E, Buarpung S, Aburajab R, Gaw SL, Sen S, Gao S, Smith SC, Park JS, Zakharevich I, Gerona RR, Fisher SJ, Woodruff TJ. Organophosphate Flame Retardants, Highly Fluorinated Chemicals, and Biomarkers of Placental Development and Disease During Mid-Gestation. Toxicol Sci 2021; 181:215-228. [PMID: 33677611 PMCID: PMC8163039 DOI: 10.1093/toxsci/kfab028] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) and organophosphate flame retardants (OPFRs) are chemicals that may contribute to placenta-mediated complications and adverse maternal-fetal health risks. Few studies have investigated these chemicals in relation to biomarkers of effect during pregnancy. We measured 12 PFASs and four urinary OPFR metabolites in 132 healthy pregnant women during mid-gestation and examined a subset with biomarkers of placental development and disease (n = 62). Molecular biomarkers included integrin alpha-1 (ITGA1), vascular endothelial-cadherin (CDH5), and matrix metalloproteinase-1 (MMP1). Morphological endpoints included potential indicators of placental stress and the extent of cytotrophoblast (CTB)-mediated uterine artery remodeling. Serum PFASs and urinary OPFR metabolites were detected in ∼50%-100% of samples. The most prevalent PFASs were perfluorononanoic acid (PFNA), perfluorooctanoic acid (PFOA), and perfluorooctane sulfonic acid (PFOS), with geometric mean (GM) levels of ∼1.3-2.8 (95% confidence limits from 1.2-3.1) ng/ml compared to ≤0.5 ng/ml for other PFASs. Diphenyl phosphate (DPhP) and bis(1,3-dichloro-2-propyl) phosphate (BDCIPP) were the most prevalent OPFR metabolites, with GMs of 2.9 (95% CI: 2.5-3.4) and 3.6 (95% CI: 2.2-3.1) ng/ml, respectively, compared to <1 ng/ml for bis(2-chloroethyl) phosphate (BCEP) and bis(1-chloro-2-propyl) phosphate (BCIPP). We found inverse associations of PFASs or OPFRs with ITGA1 or CDH5 immunoreactivity and positive associations with indicators of placental stress in multiple basal plate regions, indicating these chemicals may contribute to abnormal placentation and future health risks. Associations with blood pressure and lipid concentrations warrant further examination. This is the first study of these chemicals with placental biomarkers measured directly in human tissues and suggests specific biomarkers are sensitive indicators of exposure during a vulnerable developmental period.
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Affiliation(s)
- Julia R Varshavsky
- Program on Reproductive Health and the Environment, University of California, San Francisco (UCSF), San Francisco, California 94158
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Joshua F Robinson
- Program on Reproductive Health and the Environment, University of California, San Francisco (UCSF), San Francisco, California 94158
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Yan Zhou
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Kenisha A Puckett
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Elaine Kwan
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Sirirak Buarpung
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Rayyan Aburajab
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Stephanie L Gaw
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Saunak Sen
- Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163
| | | | - Sabrina Crispo Smith
- Environmental Chemistry Laboratory, Department of Toxic Substances Control, California Environmental Protection Agency, Berkeley, California 94710
| | - June-Soo Park
- Environmental Chemistry Laboratory, Department of Toxic Substances Control, California Environmental Protection Agency, Berkeley, California 94710
| | - Igor Zakharevich
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Roy R Gerona
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Susan J Fisher
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
| | - Tracey J Woodruff
- Program on Reproductive Health and the Environment, University of California, San Francisco (UCSF), San Francisco, California 94158
- Center for Reproductive Sciences and Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco (UCSF), San Francisco, California 94158
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9
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Maller O, Drain AP, Barrett AS, Borgquist S, Ruffell B, Zakharevich I, Pham TT, Gruosso T, Kuasne H, Lakins JN, Acerbi I, Barnes JM, Nemkov T, Chauhan A, Gruenberg J, Nasir A, Bjarnadottir O, Werb Z, Kabos P, Chen YY, Hwang ES, Park M, Coussens LM, Nelson AC, Hansen KC, Weaver VM. Tumour-associated macrophages drive stromal cell-dependent collagen crosslinking and stiffening to promote breast cancer aggression. Nat Mater 2021; 20:548-559. [PMID: 33257795 PMCID: PMC8005404 DOI: 10.1038/s41563-020-00849-5] [Citation(s) in RCA: 104] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 09/30/2020] [Indexed: 05/25/2023]
Abstract
Stromal stiffening accompanies malignancy, compromises treatment and promotes tumour aggression. Clarifying the molecular nature and the factors that regulate stromal stiffening in tumours should identify biomarkers to stratify patients for therapy and interventions to improve outcome. We profiled lysyl hydroxylase-mediated and lysyl oxidase-mediated collagen crosslinks and quantified the greatest abundance of total and complex collagen crosslinks in aggressive human breast cancer subtypes with the stiffest stroma. These tissues harbour the highest number of tumour-associated macrophages, whose therapeutic ablation in experimental models reduced metastasis, and decreased collagen crosslinks and stromal stiffening. Epithelial-targeted expression of the crosslinking enzyme, lysyl oxidase, had no impact on collagen crosslinking in PyMT mammary tumours, whereas stromal cell targeting did. Stromal cells in microdissected human tumours expressed the highest level of collagen crosslinking enzymes. Immunohistochemical analysis of biopsies from a cohort of patients with breast cancer revealed that stromal expression of lysyl hydroxylase 2, an enzyme that induces hydroxylysine aldehyde-derived collagen crosslinks and stromal stiffening, correlated significantly with disease specific mortality. The findings link tissue inflammation, stromal cell-mediated collagen crosslinking and stiffening to tumour aggression and identify lysyl hydroxylase 2 as a stromal biomarker.
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Affiliation(s)
- Ori Maller
- Department of Surgery, Center for Bioengineering and Tissue Regeneration, University of California, San Francisco, San Francisco, CA, USA
| | - Allison P Drain
- Department of Surgery, Center for Bioengineering and Tissue Regeneration, University of California, San Francisco, San Francisco, CA, USA
| | - Alexander S Barrett
- Department of Biochemistry and Molecular Genetics, University of Colorado Denver, Aurora, CO, USA
| | - Signe Borgquist
- Department of Oncology, Aarhus University/Aarhus University Hospital, Aarhus, Denmark
- Division of Oncology and Pathology, Clinical Sciences, Lund University, Lund, Sweden
| | - Brian Ruffell
- Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, OR, USA
- Knight Cancer Institute, Oregon Health and Science University, Portland, OR, USA
| | - Igor Zakharevich
- Department of Biochemistry and Molecular Genetics, University of Colorado Denver, Aurora, CO, USA
| | - Thanh T Pham
- Department of Biochemistry and Molecular Genetics, University of Colorado Denver, Aurora, CO, USA
| | - Tina Gruosso
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Department of Oncology, McGill University, Montreal, Quebec, Canada
| | - Hellen Kuasne
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Department of Oncology, McGill University, Montreal, Quebec, Canada
| | - Johnathon N Lakins
- Department of Surgery, Center for Bioengineering and Tissue Regeneration, University of California, San Francisco, San Francisco, CA, USA
| | - Irene Acerbi
- Department of Surgery, Center for Bioengineering and Tissue Regeneration, University of California, San Francisco, San Francisco, CA, USA
| | - J Matthew Barnes
- Department of Surgery, Center for Bioengineering and Tissue Regeneration, University of California, San Francisco, San Francisco, CA, USA
| | - Travis Nemkov
- Department of Biochemistry and Molecular Genetics, University of Colorado Denver, Aurora, CO, USA
| | - Aastha Chauhan
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Jessica Gruenberg
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Aqsa Nasir
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Olof Bjarnadottir
- Division of Oncology and Pathology, Clinical Sciences, Lund University, Lund, Sweden
| | - Zena Werb
- Department of Anatomy and Biomedical Sciences Program, University of California, San Francisco, San Francisco, CA, USA
- UCSF Helen Diller Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA, USA
| | - Peter Kabos
- Department of Medicine, Division of Medical Oncology, University of Colorado Denver, Aurora, CO, USA
| | - Yunn-Yi Chen
- Department of Pathology, University of California, San Francisco, San Francisco, CA, USA
| | - E Shelley Hwang
- Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Morag Park
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Department of Oncology, McGill University, Montreal, Quebec, Canada
| | - Lisa M Coussens
- Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, OR, USA
- Knight Cancer Institute, Oregon Health and Science University, Portland, OR, USA
| | - Andrew C Nelson
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, University of Colorado Denver, Aurora, CO, USA
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Valerie M Weaver
- UCSF Helen Diller Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA, USA.
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA, United States.
- Department of Radiation Oncology, University of California, San Francisco, San Francisco, CA, United States.
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA.
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10
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Abstract
This study analyzes 5 brands of dietary supplements to determine the prevalence of the nootropic drug piracetam in supplements advertised as cognitive enhancers.
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Affiliation(s)
- Pieter A Cohen
- Department of Medicine, Cambridge Health Alliance, Somerville, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Igor Zakharevich
- Clinical Toxicology and Environmental Biomonitoring Laboratory, University of California, San Francisco, San Francisco, California.,Now at Department of Biochemistry and Molecular Genetics, Anschutz Medical Campus, University of Colorado, Denver, Aurora, Colorado
| | - Roy Gerona
- Clinical Toxicology and Environmental Biomonitoring Laboratory, University of California, San Francisco, San Francisco, California
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11
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Hyland C, Bradman A, Gerona R, Patton S, Zakharevich I, Gunier RB, Klein K. Organic diet intervention significantly reduces urinary pesticide levels in U.S. children and adults. Environ Res 2019; 171:568-575. [PMID: 30765100 DOI: 10.1016/j.envres.2019.01.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 12/19/2018] [Accepted: 01/10/2019] [Indexed: 05/22/2023]
Abstract
BACKGROUND Previous diet intervention studies indicate that an organic diet can reduce urinary pesticide metabolite excretion; however, they have largely focused on organophosphate (OP) pesticides. Knowledge gaps exist regarding the impact of an organic diet on exposure to other pesticides, including pyrethroids and neonicotinoids, which are increasing in use in the United States and globally. OBJECTIVE To investigate the impact of an organic diet intervention on levels of insecticides, herbicides, and fungicides or their metabolites in urine collected from adults and children. METHODS We collected urine samples from four racially and geographically diverse families in the United States before and after an organic diet intervention (n = 16 participants and a total of 158 urine samples). RESULTS We observed significant reductions in urinary levels of thirteen pesticide metabolites and parent compounds representing OP, neonicotinoid, and pyrethroid insecticides and the herbicide 2,4-D following the introduction of an organic diet. The greatest reductions were observed for clothianidin (- 82.7%; 95% confidence interval [95% CI]: - 86.6%, - 77.6%; p < 0.01), malathion dicarboxylic acid (MDA), a metabolite of malathion (- 95.0%; 95% CI: - 97.0%, - 91.8%; p < 0.01), and 3,5,6-trichlor-2-pyridinol (TCPy), a metabolite of chlorpyrifos (- 60.7%; 95% CI: - 69.6%, - 49.2%; p < 0.01). Metabolites or parent compounds of the fungicides boscalid, iprodione, and thiabendazole and the neonicotinoid insecticide imidacloprid were not detected among participants in our study. CONCLUSION An organic diet was associated with significant reductions in urinary excretion of several pesticide metabolites and parent compounds. This study adds to a growing body of literature indicating that an organic diet may reduce exposure to a range of pesticides in children and adults. Additional research is needed to evaluate dietary exposure to neonicotinoids, which are now the most widely used class of insecticides in the world.
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Affiliation(s)
- Carly Hyland
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, CA, United States
| | - Asa Bradman
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, CA, United States
| | - Roy Gerona
- Clinical Toxicology and Environmental Biomonitoring Laboratory, University of California at San Francisco, San Francisco, CA, United States
| | | | - Igor Zakharevich
- Clinical Toxicology and Environmental Biomonitoring Laboratory, University of California at San Francisco, San Francisco, CA, United States
| | - Robert B Gunier
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California at Berkeley, Berkeley, CA, United States
| | - Kendra Klein
- Friends of the Earth U.S., 2150 Allston Way Suite 360, Berkeley, CA 94704, United States.
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