Cited by 56Cardiovascular Syncope and Autonomic DisordersEpigenetics and DNA MethylationHeart Rate Variability and Autonomic Control

Epigenetic Modification of the Norepinephrine Transporter Gene in Postural Tachycardia Syndrome

Bayles, Richard, KN, Harikrishnan, Lambert, Elisabeth, Baker, Emma K., Agrotis, Alex, Guo, Ling, Jowett, Jeremy B. M., Esler, Murray +2 more·2012·Arteriosclerosis, Thrombosis, and Vascular Biology

Abstract

Objective—: The postural tachycardia syndrome (POTS) has multiple symptoms, chief among which are tachycardia, weakness, and recurrent blackouts while standing. Previous research has implicated dysfunction of the norepinephrine transporter. A coding mutation in the norepinephrine transporter gene ( SLC6A2 ) sequence has been reported in 1 family kindred only. The goal of the present study was to further characterize the role and regulation of the SLC6A2 gene in POTS. Methods and Results—: Sympathetic nervous system responses to head-up tilt were examined by combining norepinephrine plasma kinetics measurements and muscle sympathetic nerve activity recordings in patients with POTS compared with that in controls. The SLC6A2 gene sequence was investigated in leukocytes from POTS patients and healthy controls using single nucleotide polymorphisms genotyping, bisulphite sequencing, and chromatin immunoprecipitation assays for histone modifications and binding of the transcriptional regulatory complex, methyl-CpG binding protein 2. The expression of norepinephrine transporter was lower in POTS patients compared with healthy volunteers. In the absence of altered SLC6A2 gene sequence or promoter methylation, this reduced expression was directly correlated with chromatin modifications. Conclusion—: We propose that chromatin-modifying events associated with SLC6A2 gene suppression may constitute a mechanism of POTS.

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Crossref · 10.1161/atvbaha.111.244343

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  • More focused studies attempting to tie genetic variations in the SLC6A2 gene to elevated NE levels have been inconclusive.

    “More focused studies attempting to tie genetic variations in the SLC6A2 gene to elevated NE levels, however, have been inconclusive (39,40).”

    From Postural Orthostatic Tachycardia Syndrome (2019) · cites this paper as [40]

  • Another study demonstrated that epigenetic modification of the SCL6A2 gene resulting in its downregulation was more prevalent in POTS patients than in healthy controls.

    “Another study demonstrated that epigenetic modification of the SCL6A2 gene resulting in its downregulation was more prevalent in POTS patients than in healthy controls (45).”

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Authors
Bayles, R., KN, H., Lambert, E., Baker, E. K., Agrotis, A., Guo, L., Jowett, J. B. M., Esler, M., Lambert, G., & El-Osta, A.
Affiliations
  • Baker Heart and Diabetes Institute (AU)
  • From the Baker IDI Heart & Diabetes Institute (R.B., H.K., E.L., E.K.B., A.A., L.G., J.B.M.J., M.E., G.L., A.E.-O.); and Department of Pathology, The University of Melbourne, and Faculty of Medicine, Nursing and Health Sciences, Monash University (A.E.-O.), Melbourne, Victoria, Australia.
Venue
Arteriosclerosis, Thrombosis, and Vascular Biology
Published
2012-08
Volume
32
Issue
8
Pages
1910-1916
ISSN
  • 1079-5642 (ISSN-L)
  • 1524-4636
OpenAlex
W2138650756
Cited by
56
References
40
Citations by year
2026: 3 · 2025: 2 · 2024: 2 · 2022: 3 · 2021: 2 · 2020: 5 · 2019: 6 · 2018: 3 · 2017: 4 · 2016: 10 · 2015: 4 · 2014: 4 · 2013: 6 · 2012: 2
FWCI
5.21
Type
journal article
Language
en
Open access
closed
Locations
  • Arteriosclerosis Thrombosis and Vascular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • Swinburne figshare (Swinburne University of Technology) (submittedVersion)
Topics
  • Health Sciences › Medicine › Surgery › Cardiovascular Syncope and Autonomic Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
Keywords
postural orthostatic tachycardia syndrome, norepinephrine transporter, epigenetic regulation, chromatin modification, histone modifications, DNA methylation, MeCP2, muscle sympathetic nerve activity, head-up tilt, sympathetic nervous system, gene expression inhibition
MeSH terms
Adult, Female, Hemodynamics, Humans, Male, Polymorphism, Genetic, Promoter Regions, Genetic, DNA Methylation, Gene Expression Profiling, Epigenesis, Genetic, Norepinephrine Plasma Membrane Transport Proteins, Postural Orthostatic Tachycardia Syndrome

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