Potential roles of recombinant acetylcholine receptor α subunit 1-211 in immunoadsorbent and DNA immunization.

Abstract:

:The open reading frame of the α-subunit (amino acids 1-211) of human muscle nicotinic acetylcholine receptor (hAChR(α211)) was inserted into eukaryotic expression vector of pPIC9K to form a recombinant plasmid. After transformation and expression, the target protein rhAChR(α211) (recombinant hAChR(α211)) was secretively expressed in recombinant strain P. pastoris GS115/pPIC9K-hAChR(α211) with a yield of 25 mg/L. rhAChR(α211) was purified by Q Sepharose column and gel filtration chromatography. Furthermore, the purified protein was coupled with CNBr-actived Sepharose 4B to form a special immunoadsorbent. By this immunoadsorbent, the removal rate for AChRAb in two myasthenia gravis (MG) patient sera reached 84% and 94%, respectively. The DNA fragment of hAChR(α211) was cloned into shuffle vector of pcDNA3.0 to form the recombinant plasmid pcDNA-hAChR(α211). Then the gene vaccine was directly injected intramuscularly into C57BL/6 mice. After immunization, the corresponding antibody, AChRAb, was detected in mice sera by ELISA. The target gene could be re-amplified by PCR in muscle, liver, spleen and kidney of immunized mice. It provides rapid and efficient methods to remove specific acetylcholine receptor antibody from the patient's sera and establish an animal model of myasthenia gravis by recombinant hAChR(α211) immunization.

journal_name

J Immunol Methods

authors

Niu L,Guo C,Hao Z,Yuan J,Li Z

doi

10.1016/j.jim.2011.04.015

subject

Has Abstract

pub_date

2011-09-30 00:00:00

pages

14-21

issue

1-2

eissn

0022-1759

issn

1872-7905

pii

S0022-1759(11)00179-7

journal_volume

372

pub_type

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