Microglia are involved in pain related behaviors during the acute and chronic phase of arthritis inflammation

Behzad Nasseri; Vida Nazemian; Homa Manaheji; Jalal Zarringhalam

doi:10.22037/jcma.v1i4.13557

Journal of Cellular & Molecular Anesthesia

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https://doi.org/10.22037/jcma.v1i4.13557

Microglia are involved in pain related behaviors during the acute and chronic phase of arthritis inflammation

Author(s):

Behzad Nasseri^1,*,

Vida Nazemian¹,

Homa Manaheji¹,

Jalal Zarringhalam¹

11) Neurophysiology Research Centre, Shahid Beheshti University of Medical Sciences, Tehran, Iran 2) Department of Physiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Journal of Cellular & Molecular Anesthesia:Vol. 1, issue 4; e149523

Published online:Aug 26, 2016

Article type:Original Articles

How to Cite:Behzad NasseriVida NazemianHoma ManahejiJalal ZarringhalamMicroglia are involved in pain related behaviors during the acute and chronic phase of arthritis inflammation.J Cell Mol Anesth.1(4):e149523.https://doi.org/10.22037/jcma.v1i4.13557.

Abstract

Abstract Background: Pain is one of the main protests of inflammatory diseases, hence, understanding the mechanisms which involved in the induction and persistence of pain is essential. Microglia is a contributing factor in the onset and maintenance of inflammation. Increased microglial ??activation increases the level of central pro-inflammatory cytokines and the development of central sensitization following inflammation. The aim of this study was evaluate the relation of spinal microglia activity with pain related behaviors during Complete Freund?s adjuvant (CFA)-induced inflammation. Materials and Methods: Inflammation caused by subcutaneous injection of Complete Freund?s adjuvant (CFA) in a single dose to the animals right hind paw. The edema and hyperalgesia caused by inflammation, respectively are measured by Plethysmometer and Radiant Heat, on days 0,7,14 and 21. Spinal Iba-1 protein expression was detected by Western blotting. Minocycline hydrochloride (Sigma, U.S.A) was administered i.p. at a dose of 40mg/kg daily. Results: Our study findings indicated that CFA injection to right hindpaw of rats increased paw volume and hyperalgesia significantly during different stages of study, while Minocycline treatment significantly reduced paw volume and hyperalgesia. CFA injection into the right hindpaw of the rat increases the expression of molecules Ionized calcium binding adaptor molecule -1 (Iba-1) on different days of study, while Minocycline administration reduced spinal Iba-1 expression significantly compared to the CFA group. Conclusion: The results of this study indicated the significant roles of microglia activation in deterioration of pain related behaviors during different stages of CFA-induced inflammation. The steady injection of Minocycline (as a microglia inhibitor) could reduce the inflammatory symptoms. Keywords: Inflammation, pain, microglia, minocycline

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Author(s):

Behzad Nasseri:[PubMed][Scholar]
Vida Nazemian:[PubMed][Scholar]
Homa Manaheji:[PubMed][Scholar]
Jalal Zarringhalam:[PubMed][Scholar]