twitter

Monday, 13 June 2016

Identification of anti-retinal antibodies in patients with age-related macular degeneration

Volume 93, Issue 2, October 2012, Pages 193-199

  (Article)

a  Department of Ophthalmology, Tokyo Medical and Dental University, Tokyo, Japan
b  Department of Ophthalmology, Emory University School of Medicine and Emory Eye Center, Dobbs Ocular Immunology Laboratories, Atlanta, GA, United States
c  Division of Allergy and Immunology, Department of Pediatrics, Cincinnati Children's Hospital, Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, United States 

Abstract

Age-related macular degeneration (AMD) is the leading cause of irreversible blindness in industrial counties. Recent findings indicate that the autoimmunity is involved in the pathogenesis of the disease. However, there is no autoantibody biomarker applied in a clinical setting for diagnosis and prognosis of AMD.In order to reveal retinal antigens targeted by serum IgG from AMD patients, mouse retinal tissue proteins were separated by 2-dimensional electrophoresis and the proteins in the immunoblots that were specific for dry and wet AMD patients IgG were identified by LC-MS/MS.Retinol-binding protein 3 and aldolase C (ALDOC) were mainly recognized by IgG form wet AMD patients. Pyruvate kinase M2 (PKM2) was targeted by both dry and wet AMD and level of anti-PKM2 IgG antibody was correlated best with the stage of AMD. Expression of ALDOC and PKM2 was decreased in mouse retina from aging whereas PKM2 deposit on RPE was increased in aged mice.Our data demonstrate that sera of AMD patients contain autoantibodies against retinal proteins and anti-PKM2 IgG serves as a biomarker for diagnosis and prognosis of AMD. Further investigation of the association of anti-retinal antibody level with expression level of antigens in retina will be needed to reveal the disease pathogenesis. © 2012 Elsevier Inc.

Author keywords

Age-related macular degeneration; Aldolase; Anti-retinal antibody; Autoantibody profile; Pyruvate kinase

Indexed keywords

EMTREE drug terms: aldolase c; autoantibody; fructose bisphosphate aldolase; immunoglobulin G; immunoglobulin G antibody; pyruvate kinase; pyruvate kinase M2; retina antibody; retinol binding protein; retinol binding protein 3; unclassified drug
EMTREE medical terms: adult; aged; animal tissue; article; clinical article; controlled study; enzyme linked immunosorbent assay; female; human; immunoblotting; immunoglobulin blood level; immunohistochemistry; immunoreactivity; liquid chromatography; male; mass spectrometry; mouse; nonhuman; pathogenesis; protein expression; retina; retina macula age related degeneration; reverse transcription polymerase chain reaction; separation technique; two dimensional electrophoresis; Western blotting
MeSH: Aged; Aged, 80 and over; Animals; Autoantibodies; Autoantigens; Biological Markers; Female; Fructose-Bisphosphate Aldolase; Geographic Atrophy; Humans; Immunoglobulin G; Male; Mice; Prognosis; Pyruvate Kinase; Retina; Retinol-Binding Proteins; Wet Macular Degeneration
Medline is the source for the MeSH terms of this document.
Chemicals and CAS Registry Numbers: fructose bisphosphate aldolase, 9024-52-6; immunoglobulin G, 97794-27-9; pyruvate kinase, 9001-59-6;Autoantibodies; Autoantigens; Biological Markers; Fructose-Bisphosphate Aldolase, 4.1.2.13; Immunoglobulin G; Pyruvate Kinase, 2.7.1.40; Retinol-Binding Proteins
ISSN: 00144800 CODEN: EXMPASource Type: Journal Original language: English
DOI: 10.1016/j.yexmp.2012.03.007 PubMed ID: 22465421Document Type: Article
  Ono, S.J.; University of Cincinnati, 2614 McMicken Circle, 210 Van Wormer Hall, PO Box 210097, Cincinnati, OH 45221-0097, United States; email:santa.ono@uc.edu
© Copyright 2012 Elsevier B.V., All rights reserved. © MEDLINE® is the source for the MeSH terms of this document.