Endoplasmic reticulum stress-regulated CXCR3 pathway mediates inflammation and neuronal injury in acute glaucoma

Yonju Ha, Hua Liu, Z. Xu, H. Yokota, S. P. Narayanan, T. Lemtalsi, S. B. Smith, R. W. Caldwell, R. B. Caldwell, Wenbo Zhang

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Acute glaucoma is a leading cause of irreversible blindness in East Asia. The mechanisms underlying retinal neuronal injury induced by a sudden rise in intraocular pressure (IOP) remain obscure. Here we demonstrate that the activation of CXCL10/CXCR3 axis, which mediates the recruitment and activation of inflammatory cells, has a critical role in a mouse model of acute glaucoma. The mRNA and protein expression levels of CXCL10 and CXCR3 were significantly increased after IOP-induced retinal ischemia. Blockade of the CXCR3 pathway by deleting CXCR3 gene significantly attenuated ischemic injury-induced upregulation of inflammatory molecules (interleukin-1 and E-selectin), inhibited the recruitment of microglia/monocyte to the superficial retina, reduced peroxynitrite formation, and prevented the loss of neurons within the ganglion cell layer. In contrast, intravitreal delivery of CXCL10 increased leukocyte recruitment and retinal cell apoptosis. Inhibition of endoplasmic reticulum (ER) stress with chemical chaperones partially blocked ischemic injury-induced CXCL10 upregulation, whereas induction of ER stress with tunicamycin enhanced CXCL10 expression in retina and primary retinal ganglion cells. Interestingly, deleting CXCR3 attenuated ER stressinduced retinal cell death. In conclusion, these results indicate that ER stress-medicated activation of CXCL10/CXCR3 pathway has an important role in retinal inflammation and neuronal injury after high IOP-induced ischemia.

Original languageEnglish (US)
Article numbere1900
JournalCell Death and Disease
Volume6
Issue number10
DOIs
StatePublished - Oct 1 2015

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Endoplasmic Reticulum Stress
Glaucoma
Intraocular Pressure
Inflammation
Wounds and Injuries
Retina
Up-Regulation
Ischemia
Tunicamycin
Peroxynitrous Acid
E-Selectin
Far East
Retinal Ganglion Cells
Microglia
Blindness
Interleukin-1
Ganglia
Endoplasmic Reticulum
Monocytes
Leukocytes

ASJC Scopus subject areas

  • Cell Biology
  • Immunology
  • Cancer Research
  • Cellular and Molecular Neuroscience

Cite this

Endoplasmic reticulum stress-regulated CXCR3 pathway mediates inflammation and neuronal injury in acute glaucoma. / Ha, Yonju; Liu, Hua; Xu, Z.; Yokota, H.; Narayanan, S. P.; Lemtalsi, T.; Smith, S. B.; Caldwell, R. W.; Caldwell, R. B.; Zhang, Wenbo.

In: Cell Death and Disease, Vol. 6, No. 10, e1900, 01.10.2015.

Research output: Contribution to journalArticle

Ha, Yonju ; Liu, Hua ; Xu, Z. ; Yokota, H. ; Narayanan, S. P. ; Lemtalsi, T. ; Smith, S. B. ; Caldwell, R. W. ; Caldwell, R. B. ; Zhang, Wenbo. / Endoplasmic reticulum stress-regulated CXCR3 pathway mediates inflammation and neuronal injury in acute glaucoma. In: Cell Death and Disease. 2015 ; Vol. 6, No. 10.
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