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Metalloproteinase 9 and TIMP-1 expression in retina and optic nerve in absolute angle closure glaucoma.

Abstract：

PURPOSE:Glaucoma is one of the most important reason causes of the blindness, associated with retinal ganglion cells (RGC) death. This process is not fully understood, however apoptosis due to hypoxia is one of the most important processes leading to RGC death. Glaucomatous optic neuropathy is characterized by remodeling of the extracellular matrix due to metalloproteinase activation, which leads to loss of RGC and axons at the optic nerve head. The aim of the study was to evaluate metalloproteinase 9 (MMP-9) and tissue metalloproteinase inhibitor-1 (TIMP-1) expression in the retinal ganglion cells and optic nerve axons in 33 eyes with absolute primary glaucoma. MATERIAL/METHODS:To evaluate MMP-9 and TIMP-1 expression primary polyclonal goat antibodies against MMP-9 and TIMP-1 were used. The control group was composed of 8 cases of eyes enucleated and fixed in the first day after trauma. RESULTS:MMP-9 expression was observed in retinal ganglion cells and in the inner nuclear layer of the retina in all the examined cases. In 28 out of 33 glaucomatous eyes, MMP-9 expression was observed in the proliferating glial cells surrounding the optic nerve axons. TIMP-1 expression was observed in 10 out of 33 glaucomatous eyes, only in retinal ganglion cells. None of the examined injured eyes showed MMP-9 and TIMP-1 expression. CONCLUSIONS:MMP-9 activation rather than TIMP-1 may by associated with the pathomechanism of retinal ganglion cell and optic nerve damage in absolute glaucoma.

journal_name

Adv Med Sci

journal_title

Advances in medical sciences

authors

Zalewska R,Reszeć J,Kisielewski W,Mariak Z

doi

10.1016/j.advms.2015.07.007

subject

Has Abstract

pub_date

2016-03-01 00:00:00

pages

6-10

issue

1

eissn

1896-1126

issn

1898-4002

pii

S1896-1126(15)00043-7

journal_volume

61

pub_type

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