alexa Constitutive and Stress-induced Expression of CCL5 Machinery in Rodent Retina
ISSN: 2155-9899

Journal of Clinical & Cellular Immunology
Open Access

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Research Article

Constitutive and Stress-induced Expression of CCL5 Machinery in Rodent Retina

D’Anne S. Duncan1#, William M. McLaughlin1#, Noah Vasilakes1, Franklin D. Echevarria2, Cathryn R. Formichella1 and Rebecca M. Sappington1,3*

1Department of Ophthalmology and Visual Sciences, Vanderbilt Eye Institute, Vanderbilt University Medical Center, USA

2Neuroscience Graduate Program, Vanderbilt University, USA

3Department of Pharmacology, Vanderbilt University School of Medicine, 11425 Medical Research Building IV, Nashville, TN 37232-0654, USA

#Equally contributed

*Corresponding Author:
Rebecca M. Sappington
Department of Ophthalmology and Visual Sciences
Vanderbilt Eye Institute, Vanderbilt University Medical Center, USA
Tel: +615-322-0790
Fax: +615-936-6410
E-mail: [email protected]

Received date: December 07, 2016; Accepted date: May 18, 2017; Published date: May 24, 2017

Citation: Duncan DS, McLaughlin WM, Vasilakes N, Echevarria FD, Formichella CR, et al. (2017) Constitutive and Stress-induced Expression of CCL5 Machinery in Rodent Retina. J Clin Cell Immunol 8:506. doi: 10.4172/2155-9899.1000506

Copyright: © 2017 Duncan DS, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



Signaling by inflammatory cytokines and chemokines is associated with neurodegeneration in disease and injury. Here we examined expression of the β-chemokine CCL5 and its receptors in the mouse retina and evaluated its relevance in glaucoma, a common optic neuropathy associated with sensitivity to intraocular pressure (IOP). Using quantitative PCR, fluorescent in situ hybridization, immunohistochemistry and quantitative image analysis, we found CCL5 mRNA and protein was constitutively expressed in the inner retina and synaptic layers. CCL5 appeared to associate with Müller cells and RGCs as well as synaptic connections between horizontal cells and bipolar cells in the OPL and amacrine cells, bipolar cells and RGCs in the IPL. Although all three high-affinity receptors (CCR5, CCR3, CCR1) for CCL5 were expressed constitutively, CCR5 expression was significantly higher than CCR3, which was also markedly greater than CCR1. Localization patterns for constitutive CCR5, CCR3 and CCR1 expression differed, particularly with respect to expression in inner retinal neurons. Stress-related expression of CCL5 was primarily altered in aged DBA/2 mice with elevated IOP. In contrast, changes in expression and localization of both CCR3 and CCR5 were evident not only in aged DBA/2 mice, but also in age-matched control mice and young DBA/2 mice. These groups do not exhibit elevated IOP, but possess either the aging stress (control mice) or the genetic predisposition to glaucoma (DBA/2 mice). Together, these data indicate that CCL5 and its high-affinity receptors are constitutively expressed in murine retina and differentially induced by stressors associated with glaucomatous optic neuropathy. Localization patterns further indicate that CCL5 signaling may be relevant for modulation of synapses in both health and disease, particularly in the inner plexiform layer.


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