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Biochim Biophys Acta Gen Subj. 2018 Dec;1862(12):2605-2612. doi: 10.1016/j.bbagen.2018.07.001. Epub 2018 Jul 4.

Opioid and Notch signaling pathways are reciprocally regulated through miR- 29a and miR-212 expression.

Author information

1
Institute of Neurosciences of Castilla y Leon (INCyL), C/Pintor Fernando Gallego, 1, 37007 Salamanca, Spain; Institute of Biomedical Research of Salamanca (IBSAL), Hospital Universitario de Salamanca, Edificio Virgen de la Vega. Décima Planta, P° de San Vicente 58-182, 37007 Salamanca, Spain.
2
Institute of Neurosciences of Castilla y Leon (INCyL), C/Pintor Fernando Gallego, 1, 37007 Salamanca, Spain; Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Salamanca, C/Alfonso X El Sabio, 0 S-N Campus Miguel De Unamuno, 37007 Salamanca, Spain; Institute of Biomedical Research of Salamanca (IBSAL), Hospital Universitario de Salamanca, Edificio Virgen de la Vega. Décima Planta, P° de San Vicente 58-182, 37007 Salamanca, Spain. Electronic address: requelmi@usal.es.

Abstract

BACKGROUND:

The abuse of opioids, such as morphine and phentanyl or other drugs as heroin is a social and health problem that affects an increasing number of people each year. The activation of the mu opioid receptor triggers several molecular changes that alter the expression of diverse genes, including miRNAs. The dysregulation of these molecules could explain some of the developmental alterations that are induced after drug intake. In addition, the Notch signaling cascade has also been related to alterations on these processes.

METHODS:

Zebrafish embryos and SH-SY5Y cells were used to assess the effects of opioid and Notch signaling on the expression on miR-29a and miR-212/132 by qPCR and ChIP-qPCR. Notch1 expression was analyzed using in situ hybridization on 24 hpf zebrafish embryos. In addition, OPRM1 and NICD levels were measured using western blot on the cultured cells to determine the cross-talk between the two pathways.

RESULTS:

We have observed changes in the levels of miR-212/132 after administrating DAPT to zebrafish embryos indicating that this pathway could be regulating mu opioid receptor expression. In addition, the ISH experiment showed changes in Notch1 expression after morphine and DAPT administration. Moreover, morphine affects the expression of miR-29a through NF-κB, therefore controlling the cleavage and activation of Notch through ADAM12 expression.

CONCLUSIONS:

This study shows that these two pathways are closely related, and could explain the alterations triggered in the early stages of the development of addiction.

GENERAL SIGNIFICANCE:

Opioid and Notch pathway are reciprocally regulated by the miRNAs 212/132 and 29a.

KEYWORDS:

Addiction; Danio rerio; Morphine; Notch; microRNA; mu opioid receptor

PMID:
30251655
DOI:
10.1016/j.bbagen.2018.07.001
[Indexed for MEDLINE]

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