Effects of in vitro and in vivo avermectin exposure on alpha synuclein expression and proteasomal activity in pigeons.
Avermectins (AVMs) are used worldwide in agriculture and veterinary medicine. Residues of avermectin drugs, causing toxicological effects on non-target organisms, have raised great concern. The aim of this study was to investigate the effects of AVM on the expression levels of alpha synuclein (α-Syn) and proteasomal activity in pigeon (Columba livia) neurons both in vivo and in vitro. The results showed that, the mRNA and protein levels of α-Syn increased in AVM treated groups relative to control groups in the cerebrum, cerebellum and optic lobe in vivo. Dose-dependent decreases in the proteasomal activity (i.e., chymotrypsin-like, trypsin-like and peptidylglutamyl peptidehydrolase) were observed both in vivo and in vitro. The results suggested that AVM could induce the expression levels of α-Syn and inhibit the normal physiological function of proteasome in brain tissues and neurons. The information presented in this study is helpful to understand the mechanism of AVM-induced neurotoxicology in birds.
College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; College of Life Science, Daqing Normal College, Daqing 163712, PR China.
Ming
M
Li
College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China.
Shuo
S
Zhou
College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China.
Xian-Song
XS
Wang
College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China.
Ci
C
Liu
College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China. Electronic address: lishu@neau.edu.cn.
Shu
S
Li
D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D002478:Cells, Cultured; D002681:China; D010856:Columbidae / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring / Q000379:methods*; D004785:Environmental Pollutants / Q000633:toxicity*; D007559:Ivermectin / Q000031:analogs & derivatives* / Q000633:toxicity; D009474:Neurons / Q000187:drug effects / Q000378:metabolism; D061251:Primary Cell Culture; D046988:Proteasome Endopeptidase Complex / Q000378:metabolism*; D012333:RNA, Messenger / Q000378:metabolism; D051844:alpha-Synuclein / Q000096:biosynthesis*
D004785:Environmental Pollutants; D012333:RNA, Messenger; D051844:alpha-Synuclein; D007559:Ivermectin; C019264:avermectin; D046988:Proteasome Endopeptidase Complex
Alpha-synuclein; Avermectin; Brain tissue; Neuron; Pigeon; Proteasomal activity