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July 2017; 4 (4) ArticleOpen Access

Dynamic regulation of serum aryl hydrocarbon receptor agonists in MS

Veit Rothhammer, Davis M. Borucki, Maria Isabel Garcia Sanchez, Maria Antonietta Mazzola, Christopher C. Hemond, Keren Regev, Anu Paul, Pia Kivisäkk, Rohit Bakshi, Guillermo Izquierdo, Howard L. Weiner, Francisco J. Quintana
First published June 16, 2017, DOI: https://doi.org/10.1212/NXI.0000000000000359
Veit Rothhammer
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Davis M. Borucki
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Maria Isabel Garcia Sanchez
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Maria Antonietta Mazzola
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Christopher C. Hemond
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Keren Regev
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Anu Paul
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Pia Kivisäkk
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Rohit Bakshi
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Guillermo Izquierdo
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Howard L. Weiner
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Francisco J. Quintana
From the Ann Romney Center for Neurologic Diseases (V.R., D.M.B., M.A.M., C.C.H., K.R., A.P., P.K., R.B., H.L.W., F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Molecular Biology Service and MS Unit (M.I.G.S., G.I.), University of Seville, Spain; and Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA.
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Citation
Dynamic regulation of serum aryl hydrocarbon receptor agonists in MS
Veit Rothhammer, Davis M. Borucki, Maria Isabel Garcia Sanchez, Maria Antonietta Mazzola, Christopher C. Hemond, Keren Regev, Anu Paul, Pia Kivisäkk, Rohit Bakshi, Guillermo Izquierdo, Howard L. Weiner, Francisco J. Quintana
Neurol Neuroimmunol Neuroinflamm Jul 2017, 4 (4) e359; DOI: 10.1212/NXI.0000000000000359

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Abstract

Objective: Several factors influence the clinical course of autoimmune inflammatory diseases such as MS and inflammatory bowel disease. Only recently, the complex interaction between the gut microbiome, dietary factors, and metabolism has started to be appreciated with regard to its potential to modulate acute and chronic inflammation. One of the molecular sensors that mediates the effects of these environmental signals on the immune response is the aryl hydrocarbon receptor (AHR), a ligand-activated transcription factor with key functions in immune cells.

Methods: In this study, we analyzed the levels of AHR agonists in serum samples from patients with MS and healthy controls in a case-control study.

Results: We detected a global decrease of circulating AHR agonists in relapsing-remitting MS patients as compared to controls. However, during acute CNS inflammation in clinically isolated syndrome or active MS, we measured increased AHR agonistic activity. Moreover, AHR ligand levels in patients with benign MS with relatively mild clinical impairment despite longstanding disease were unaltered as compared to healthy controls.

Conclusions: Collectively, these data suggest that AHR agonists in serum are dynamically modulated during the course of MS. These findings may guide the development of biomarkers to monitor disease activity as well as the design of novel therapeutic interventions for MS.

GLOSSARY

AHR=
aryl hydrocarbon receptor;
CIS=
clinically isolated syndrome;
DMT=
disease-modifying therapy;
HEK=
human embryonic kidney;
IBD=
inflammatory bowel disease;
Kyn=
Kynurenine;
RRMS=
relapsing-remitting MS

Footnotes

  • Funding information and disclosures are provided at the end of the article. Go to Neurology.org/nn for full disclosure forms. The Article Processing Charge was funded by the NIH.

  • Supplemental data at Neurology.org/nn

  • Received February 1, 2017.
  • Accepted in final form March 23, 2017.
  • Copyright © 2017 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND), which permits downloading and sharing the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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