title: Concentrations of antibodies against β-amyloid 40/42 monomer and oligomers in Chinese intravenous immunoglobulins.
abstract: Intravenous immunoglobulin (IVIg) preparations are being investigated as a potential agent for treatment or prevention of Alzheimer's disease (AD). Antibodies towards soluble β-amyloid (Aβ) contained in IVIg were considered to be the major component contributing to the beneficial effect of the preparations in pilot studies. This study compared the antibody concentrations against Aβ in Octagam®IVIg (Octapharma) and 9 IVIg preparations from different Chinese manufacturers by ELISA, using Aβ40 monomer, Aβ40 soluble oligomers, Aβ42 monomer and Aβ42 soluble oligomers as the antigens. The results showed that each preparation contained different antibody levels against the four Aβ forms. The median values of the four antibody concentrations in Chinese IVIg preparations were 16.53, 8.47, 24.36 and 33.25μg/mL, which were remarkably higher than that in Octagam®IVIg (1.66, 2.07, 4.61 and 4.64μg/mL). Moreover, the anti-Aβ42 oligomer antibody levels in almost all IVIg preparations were higher than the anti-Aβ42 monomer antibody, and the concentrations of anti-Aβ42 antibodies in most of the IVIg preparations were significantly higher than that of anti-Aβ40 antibodies. These findings will contribute to an increased understanding of the uniqueness of Chinese IVIg preparations, and could provide support for a trial of a Chinese IVIg product in AD patients.
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: yeshl@aliyun.com.
authors.forename: Shengliang
authors.initials: S
authors.lastname: Ye
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: zengry2011@126.com.
authors.forename: Renyong
authors.initials: R
authors.lastname: Zeng
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: pengjiang2014@163.com.
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: 251873769@qq.com.
authors.forename: Mingxia
authors.initials: M
authors.lastname: Hou
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: liufengjuan110@126.com.
authors.forename: Fengjuan
authors.initials: F
authors.lastname: Liu
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: pumchammer@163.com.
authors.forename: Zongkui
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: shela44@163.com.
authors.forename: Xi
authors.initials: X
authors.lastname: Du
authors.affiliation: Guizhou Taibang Biological Products Co. Ltd., 156 Daqian Road, Huaxi District, Guiyang, 550025, China. Electronic address: yuanjing@chinabiologic.com.
authors.forename: Jing
authors.initials: J
authors.lastname: Yuan
authors.affiliation: Guizhou Taibang Biological Products Co. Ltd., 156 Daqian Road, Huaxi District, Guiyang, 550025, China. Electronic address: chenyunhua@chinabiologic.com.
authors.forename: Yunhua
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: chjr007@163.com.
authors.forename: Haijun
authors.initials: H
authors.lastname: Cao
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: mary19820225@163.com.
authors.forename: Li
authors.initials: L
authors.lastname: Ma
authors.affiliation: Institute of Blood Transfusion, Chinese Academy of Medical Sciences, 26 Huacai Road, Longtan Industry Park, Chenghua District, Chengdu, 610052, China. Electronic address: lichangqing268@163.com.
authors.forename: Changqing
authors.initials: C
authors.lastname: Li
mesh_terms: D000544:Alzheimer Disease / Q000276:immunology; D016229:Amyloid beta-Peptides / Q000276:immunology*; D000906:Antibodies / Q000276:immunology*; D002681:China; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D016756:Immunoglobulins, Intravenous / Q000276:immunology*; D010446:Peptide Fragments / Q000276:immunology*
chemical_list: D016229:Amyloid beta-Peptides; D000906:Antibodies; D016756:Immunoglobulins, Intravenous; C495669:Octagam; D010446:Peptide Fragments
keywords: &beta; -amyloid; Alzheimer's disease; Antibody; Intravenous immunoglobulin; Monomer; Oligomers