Minocycline Prevents Depression-like Behavior After Co-administration With Dexamethasone or Cyclosporine-A in Mice

• Main Authors: Azadeh Mesripour (Author), Sara Pezeshki (Author)
• Format: Book
• Published: Mazandaran University of Medical Sciences, 2023-07-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary

Background: In animal studies, minocycline (Mcy) has been proven to have antidepressant effects. In addition to modulating peripheral and central pro-inflammatory pathways, Mcy may regulate the hypothalamic-pituitary-adrenal (HPA) axis and the mechanistic target of rapamycin (mTOR) signaling pathway. This study aims to evaluate the antidepressant-like effect of Mcy in mice following injection of dexamethasone (Dex) or cyclosporine-A (CsA).  Methods: Male NMRI mice were randomly divided into eight groups of 6, including control, Dex 0.25 mg/kg, CsA 20 mg/kg, Mcy 40 mg/kg, Dex+Mcy, Dex+fluoxetine 20 mg/kg, CsA+Mcy, and CsA+fluoxetine. All drugs were injected intraperitoneally (except for Dex, which was subcutaneous injection) once daily for 3 days. The locomotor activity, forced swimming test (FST), and sucrose preference (SP) test were performed on day 4.  Results: Mcy alone reduced immobility time in the FST (27.0±6.4 s) compared to the control group (104±3.9 s) (P<0.001). After the co-administration of Mcy and Dex, the immobility time significantly decreased (79.5±6.5 s) compared to the Dex group (P<0.001). It also decreased following the co-administration of Mcy and CsA (67.5±20.8 s) compared to the CsA group (P<0.001). Results were similar in the groups treated with fluoxetine plus Dex or CsA. Significant differences were not observed in the locomotor activity test.  Conclusion: Mcy prevents depression-like behavior in mice during the FST when it is co-administrated with CsA or Dex. The possibility of the positive effect of Mcy on the HPA axis and the mTOR signaling pathway should be examined in further studies.

Item Description

2423-4494