TY - JOUR
T1 - Development of biomarker for detecting silver nanoparticles exposure using a GAL4 enhancer trap screening in Drosophila
AU - Tian, Hong
AU - Eom, Hyun Jeong
AU - Moon, Sungjin
AU - Lee, Jeongmi
AU - Choi, Jinhee
AU - Chung, Yun Doo
PY - 2013/9
Y1 - 2013/9
N2 - Silver nanoparticles (AgNPs) have been widely used in commercial goods ranging from medical devices to home appliances. Their widespread application increase the risk related to their potential toxicity. Although several studies showed their acute hazardous effects on living animals, our understanding of chronic effects of AgNPs exposed by the environment we encounter in our everyday lives is still very limited. This is partly because of the lack of versatile animal model system for studying AgNPs effects on terrestrial animals including human. In this study, we used Drosophila model to study AgNPs toxicity in terrestrial animals, and found that long-term exposure of AgNPs, but not Ag ions, at low level (0.1 and 1μg/mL) significantly shortened the lifespan. By taking advantage of the power of Drosophila genetics, we also isolated a GAL4 enhancer trap line called M95, in which the expression of GAL4 is up-regulated in response to ingestion of AgNPs at concentrations as low as 0.1μg/mL. Interestingly M95 flies showed significantly increased tolerance to both AgNPs treatment and dry starvation probably due to up-regulation of JNK signaling. These findings suggest not only that M95 may be a very useful biomarker of AgNPs because of its high sensitivity and tolerance to AgNPs, but also that Drosophila may be a versatile terrestrial invertebrate model for studying the effects of AgNPs on human health.
AB - Silver nanoparticles (AgNPs) have been widely used in commercial goods ranging from medical devices to home appliances. Their widespread application increase the risk related to their potential toxicity. Although several studies showed their acute hazardous effects on living animals, our understanding of chronic effects of AgNPs exposed by the environment we encounter in our everyday lives is still very limited. This is partly because of the lack of versatile animal model system for studying AgNPs effects on terrestrial animals including human. In this study, we used Drosophila model to study AgNPs toxicity in terrestrial animals, and found that long-term exposure of AgNPs, but not Ag ions, at low level (0.1 and 1μg/mL) significantly shortened the lifespan. By taking advantage of the power of Drosophila genetics, we also isolated a GAL4 enhancer trap line called M95, in which the expression of GAL4 is up-regulated in response to ingestion of AgNPs at concentrations as low as 0.1μg/mL. Interestingly M95 flies showed significantly increased tolerance to both AgNPs treatment and dry starvation probably due to up-regulation of JNK signaling. These findings suggest not only that M95 may be a very useful biomarker of AgNPs because of its high sensitivity and tolerance to AgNPs, but also that Drosophila may be a versatile terrestrial invertebrate model for studying the effects of AgNPs on human health.
KW - Biomarker
KW - Drosophila melanogaster
KW - GAL4 enhancer trap
KW - JNK
KW - Silver nanoparticles (AgNPs)
UR - http://www.scopus.com/inward/record.url?scp=84880294692&partnerID=8YFLogxK
U2 - 10.1016/j.etap.2013.05.013
DO - 10.1016/j.etap.2013.05.013
M3 - Article
C2 - 23827194
AN - SCOPUS:84880294692
SN - 1382-6689
VL - 36
SP - 548
EP - 556
JO - Environmental Toxicology and Pharmacology
JF - Environmental Toxicology and Pharmacology
IS - 2
ER -