Evidence for presence of IgG4 anti-immunoglobulin autoantibodies in all human beings

Hennig, C.; Rink, L.; Kirchner, H.

Lancet 355(9215): 1617-1618

2000


ISSN/ISBN: 0140-6736
PMID: 10821371
Document Number: 516432
IgG4 anti-IgG autoantibodies were found to be present in all serum samples from a group of healthy people; IgG4 anti-IgA and anti-IgE were present in only 13 of 218 (6%) and 8 of 218 (3.5%) samples, respectively. These antibodies also showed affinities towards animal immunoglobulins. We suggest that IgG4 anti-IgA antibodies (the strongest found heterophilic immunoglobulins) are responsible for most artifacts obtained with commercial ELISA systems.

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