Abstract
A non-genotoxic insecticide dichlorodiphenyltrichloroethane (DDT), can affect mRNA and microRNA levels, however, its precise mechanism of action remains poorly understood. Using in silico methods we found that the rat miR-190 family is potentially regulated by CAR and ER receptors activated by DDT. We showed that exposure to DDT results in a dose- and organ-dependent increase in the expression of miR-190a, -190b in the liver, uterus, ovaries and mammary gland of female Wistar rats. Additionally, we demonstrate a decrease in protein product level of Tp53inp1, the target gene of these microRNAs, in the rat uterus. It is known that miR-190 is probably regulated by ER in humans, thus we measured the level of miR-190a, -190b in primary cultures of malignant and normal human endometrial cells treated with different doses of DDT. We detected an increase in miR-190b level in normal endometrial cells under DDT exposure. Thus, our results indicate that DDT exposure lead to change in the expression of oncogenic miR-190 family and its target gene Tp53inp1 which may be due to activation of CAR and ER.




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- miR:
-
MicroRNA
- COP:
-
Chlororganic pesticide
- EDC:
-
Endocrine disrupting chemical
- DDT:
-
Dichlorodiphenyltrichloroethane
- ER:
-
Estrogen receptor
- CAR:
-
Constitutive androstane receptor
- PBREM:
-
Phenobarbital-responsive enhancer module
- ERE:
-
Estrogen response element
- nt:
-
Nucleotide
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Acknowledgements
This work is supported by the Russian Science Foundation, Project # 15-15-30012.
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All experimental procedures were approved by the Bioethics Committee of the Institute of Molecular Biology and Biophysics and carried out in accordance with Directive 2010/63/EU.
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Kalinina, T.S., Kononchuk, V.V., Ovchinnikov, V.Y. et al. Expression of the miR-190 family is increased under DDT exposure in vivo and in vitro. Mol Biol Rep 45, 1937–1945 (2018). https://doi.org/10.1007/s11033-018-4343-0
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DOI: https://doi.org/10.1007/s11033-018-4343-0

