title: Tween-80 and impurity induce anaphylactoid reaction in zebrafish.
abstract: A number of recent reports suspected that Tween-80 in injectable medicines, including traditional Chinese medicine injections could cause life-threatening anaphylactoid reaction, but no sound conclusion was drawn. A drug-induced anaphylactoid reaction is hard to be assayed in vitro and in conventional animal models. In this study, we developed a microplate-based quantitative in vivo zebrafish assay for assessing anaphylactoid reaction and live whole zebrafish mast cell tryptase activity was quantitatively measured at a wavelength of 405 nm using N-benzoyl-dl-arginine p-nitroanilide as a substrate. We assessed 10 batches of Tween-80 solutions from various national and international suppliers and three Tween-80 impurities (ethylene glycol, 2-chloroethanol and hydrogen peroxide) in this model and found that three batches of Tween-80 (nos 2, 20080709 and 20080616) and one Tween-80 impurity, hydrogen peroxide (H2 O2 ), induced anaphylactoid reactions in zebrafish. Furthermore, we found that H2 O2 residue and peroxide value were much higher in Tween-80 samples 2, 20080709 and 20080616. These findings suggest that H2 O2 residue in combination with oxidized fatty acid residues (measured as peroxide value) or more likely the oxidized fatty acid residues in Tween-80 samples, but not Tween-80 itself, may induce anaphylactoid reaction. High-throughput zebrafish tryptase assay developed in this report could be used for assessing safety of Tween-80-containing injectable medicines and potentially for screening novel mast cell-modulating drugs.
authors.affiliation: National Institutes for Food and Drug Control, China Food and Drug Administration (CFDA), No. 2 Tiantan Xili, Dongcheng District, Beijing, 100050, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Yang
authors.forename: Qiao-Cong
authors.initials: QC
authors.lastname: Lao
authors.forename: Hang-Ping
authors.initials: HP
authors.lastname: Yu
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Hong-Cui
authors.initials: HC
authors.lastname: Liu
authors.forename: Lin
authors.initials: L
authors.lastname: Luan
authors.forename: Hui-Min
authors.initials: HM
authors.lastname: Sun
authors.forename: Chun-Qi
authors.initials: CQ
authors.lastname: Li
mesh_terms: D000707:Anaphylaxis / Q000139:chemically induced* / Q000201:enzymology / Q000276:immunology; D000818:Animals; D004340:Drug Contamination; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage; D005023:Ethylene Chlorohydrin / Q000737:chemistry / Q000633:toxicity; D019855:Ethylene Glycol / Q000737:chemistry / Q000633:toxicity; D005079:Excipients / Q000737:chemistry / Q000633:toxicity*; D057166:High-Throughput Screening Assays; D006861:Hydrogen Peroxide / Q000737:chemistry / Q000633:toxicity; D007422:Intestines / Q000187:drug effects; D008407:Mast Cells / Q000187:drug effects; D011136:Polysorbates / Q000737:chemistry / Q000633:toxicity*; D053802:Tryptases / Q000378:metabolism; D015027:Zebrafish / Q000276:immunology*
chemical_list: D004365:Drugs, Chinese Herbal; D005079:Excipients; D011136:Polysorbates; D005023:Ethylene Chlorohydrin; D006861:Hydrogen Peroxide; D053802:Tryptases; D019855:Ethylene Glycol
keywords: Tween-80; anaphylactoid reaction; impurity; tryptase; zebrafish