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A novel general and efficient technique for dissociating antigen in circulating immune complexes
Author(s) -
Dai Yuzhu,
Hu Zhengjun,
Chen Yu,
Lou Bin,
Cui Dawei,
Xu Aifang,
Rao Yueli,
He Jiahui,
Yang Jiezuan,
Zeng Xianming,
Xu Xujian,
Wang Guozheng,
Xu Jian,
Zhou Tieli,
Sun Changgui,
Cheng Jun
Publication year - 2018
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201700246
Subject(s) - antigen , polyethylene glycol , dissociation (chemistry) , chemistry , immune complex , immune system , peg ratio , antigen antibody complex , chromatography , biochemistry , immunology , biology , organic chemistry , finance , economics
Circulating immune complexes (CICs) are produced during the immune response. It is more clinically important to establish a general and efficient CICs dissociation technique for the detection of antigens for CICs other than the detection of free antigens in the serum. Polyethylene glycol (PEG) two‐precipitation separation and glycine‐HCl as a buffer system were employed to develop a general and efficient buffer dissociation technique to separate CICs from serum and dissociate antigens from CICs. The measurement value of new PEG two‐precipitation separation technique was higher than traditional PEG precipitation separation technique. There were slight differences in the dissociation conditions of HCV Core‐IC, HIV P24‐IC, Ins‐IC and TG‐IC as compared to HBsAg‐IC. The detection of antigens in HBsAg‐IC, HCV Core‐IC, HIV P24‐IC, Ins‐IC and TG‐IC with this technique was superior to that with HCl Dissociation, Trypsin Digestion or Immune Complex Transfer technique. PEG two‐precipitation dissociation technique may reduce macromolecular protein and the adhesion of free antigens during the co‐precipitation, which increases the efficiency of separation and precipitation of CICs. This technique also avoids the damage of reagents to antigens, assuring the repeatability, reliability and validity. Thus, this technique is application in samples negative or positive for free antigens.