Effects of Post-Weaning Chronic Stress on Nociception, Spinal Cord μ-Opioid, and α2-Adrenergic Receptors Expression in Rats and Their Offspring

Overview

Journal J Mol Neurosci

Specialties Molecular Biology
Neurology

Date 2018 Apr 28

PMID 29700767

Citations 2

Authors

Asef Hormozi

Asadollah Zarifkar

Mohsen Tatar

Mahdi Barazesh

Bahar Rostami

Affiliations

Soon will be listed here.

Abstract

Stressful situations can change biological process in human and animal, and some of these changes may transfer to the next generations. We used a communication box to induce chronic electrical foot-shock stress in rats. Tail flick latency and formalin test were done to determine the level of pain sensation. Real-time RT-PCR was used to measure the level of spinal cord μ-opioid (MOR) and α2-adrenergic receptors (α2-AR) mRNA. We demonstrate that chronic stress can change nociception and leads to hyperalgesia. Moreover, spinal cord MOR mRNA level decreased following chronic stress. We did not observe any significant changes in the level of spinal cord α2-AR mRNA between stressed and non-stressed rats. In addition, non-stressed sons of stressed mothers showed hyperalgesia compared to the control group. They showed lesser level of MOR mRNA level in comparison to the control rats. Furthermore, stressed sons of stressed mothers illustrated more hyperalgesia than the other stressed groups. We indicate that chronic stress can reduce spinal cord MOR mRNA level and lead to hyperalgesia. Additionally, these changes can transfer to offspring.

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