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. 2013 Apr 15;257(1-2):102-6.
doi: 10.1016/j.jneuroim.2012.12.010. Epub 2013 Jan 11.

Autoantibody-induced internalization of nicotinic acetylcholine receptor α3 subunit exogenously expressed in human embryonic kidney cells

Shota Kobayashi  1 , Shigeru Yokoyama, Takahiro Maruta, Masako Negami, Akiko Muroyama, Yasuhide Mitsumoto, Kazuo Iwasa, Masahito Yamada, Hiroaki Yoshikawa
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Free article

Autoantibody-induced internalization of nicotinic acetylcholine receptor α3 subunit exogenously expressed in human embryonic kidney cells

Shota Kobayashi et al. J Neuroimmunol. .
Free article

Abstract

Autoantibody against nicotinic acetylcholine receptor (nAChR) α3 subunit has been implicated in the pathogenesis of paraneoplastic neurological syndrome. To examine the effect of anti-α3 subunit autoantibody on cell-surface nAChRs, we established human embryonic kidney 293 cells stably co-expressing α3 and β4 subunits. Upon incubation with seropositive patient's serum, this cell line showed co-accumulation of patient's IgG and α3 subunits in the cytoplasm. These data support the hypothesis that anti-α3 subunit autoantibody induces internalization of cell-surface nAChRs and thereby impairs synaptic transmission.

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