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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Immunology
2015 ; 146
(3
): 401-10
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Guanine polynucleotides are self-antigens for human natural autoantibodies and
are significantly reduced in the human genome
#MMPMID26227667
Fattal I
; Shental N
; Ben-Dor S
; Molad Y
; Gabrielli A
; Pokroy-Shapira E
; Oren S
; Livneh A
; Langevitz P
; Zandman-Goddard G
; Sarig O
; Margalit R
; Gafter U
; Domany E
; Cohen IR
Immunology
2015[Nov]; 146
(3
): 401-10
PMID26227667
show ga
In the course of investigating anti-DNA autoantibodies, we examined IgM and IgG
antibodies to poly-G and other oligonucleotides in the sera of healthy persons
and those diagnosed with systemic lupus erythematosus (SLE), scleroderma (SSc),
or pemphigus vulgaris (PV); we used an antigen microarray and informatic
analysis. We now report that all of the 135 humans studied, irrespective of
health or autoimmune disease, manifested relatively high amounts of IgG
antibodies binding to the 20-mer G oligonucleotide (G20); no participants
entirely lacked this reactivity. IgG antibodies to homo-nucleotides A20, C20 or
T20 were present only in the sera of SLE patients who were positive for
antibodies to dsDNA. The prevalence of anti-G20 antibodies led us to survey
human, mouse and Drosophila melanogaster (fruit fly) genomes for runs of T20 and
G20 or more: runs of T20 appear > 170,000 times compared with only 93 runs of G20
or more in the human genome; of these runs, 40 were close to brain-associated
genes. Mouse and fruit fly genomes showed significantly lower T20/G20 ratios than
did human genomes. Moreover, sera from both healthy and SLE mice contained
relatively little or no anti-G20 antibodies; so natural anti-G20 antibodies
appear to be characteristic of humans. These unexpected observations invite
investigation of the immune functions of anti-G20 antibodies in human health and
disease and of runs of G20 in the human genome.