Autoimmunoreactive IgGs from patients with postural orthostatic tachycardia syndrome. Proteomics Clin Appl 2012 Dec;6(11-12):615-25
Date
09/25/2012Pubmed ID
23002038Pubmed Central ID
PMC3786406DOI
10.1002/prca.201200049Scopus ID
2-s2.0-84871463034 (requires institutional sign-in at Scopus site) 30 CitationsAbstract
PURPOSE: Autoantibodies are implicated in the pathogenesis of cardiovascular diseases and cardiac arrhythmias. In this pilot study, we tested the hypothesis that autoantibodies are present in patients with postural orthostatic tachycardia syndrome (POTS).
EXPERIMENTAL DESIGN: Seven control subjects (6 F:1 M, average age 36.1 years) and ten patients with the diagnosis of POTS (7 F: 3 M, average age 35.1 years) provided informed consent and 30 mL of venous blood. Human heart membrane proteins were resolved by 2DE and immunoblotted against purified IgGs from controls and patients.
RESULTS: Eighteen protein spots immunoreactive specifically against patient IgGs were detected and they were excised from gels, trypsin-digested, and analyzed by nanoLC-electrospray MS/MS. Forty unique proteins were identified and these include proteins that are associated with cardiac hypertrophy (mimecan, myozenin), cardiac remodeling (periostin), cardiomyopathy (desmin, desmoplakin), cell survival (laminin), structural integrity (filamin), chaperone proteins (crystalline, HSP70), mitochondrial enzymes, and channel proteins. Ingenuity Pathway Analysis showed multiple pathways were involved including those that regulate energy metabolism, redox, fibrosis, cardiac hypertrophy, and degeneration.
CONCLUSIONS AND CLINICAL RELEVANCE: Autoantibodies are present in patients with POTS. These autoantibodies cross-react with a wide range of cardiac proteins and may induce alterations in cardiac function. Autoimmune pathogenetic mechanisms should be further explored in these patients.
Author List
Wang XL, Chai Q, Charlesworth MC, Figueroa JJ, Low P, Shen WK, Lee HCAuthor
Juan Jose Figueroa MD Assistant Professor in the Neurology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AdolescentAdult
Case-Control Studies
Electrophoresis, Gel, Two-Dimensional
Female
Humans
Immunoblotting
Immunoglobulin G
Male
Mass Spectrometry
Middle Aged
Postural Orthostatic Tachycardia Syndrome
Protein Interaction Maps
Proteome
Young Adult
