Distribution of amyloid precursor protein and amyloid-beta in ocular hypertensive C57BL/6 mouse eyes.

Published

Journal Article

Amyloid precursor protein (APP) and amyloid-beta (Abeta) appear to participate in the pathophysiology of retinal ganglion cell (RGC) death in glaucoma. We, therefore, determined the distribution of APP and Abeta in the retinas of C57BL/6 mice after induction of chronic ocular hypertension.Ocular hypertension was induced in one eye of three-month-old C57BL/6 mice by injection of hypertonic saline into episcleral veins. After 6 weeks of documented elevated intraocular pressure (IOP), retinas were fixed with 4% paraformaldehyde and processed for immunohistochemistry with antibodies including a polyclonal antibody to the C-terminus of Abeta 40 (Novartis 17-40/23) and a polyclonal antibody to the APP ectodomain (Novartis 474). Distribution and semiquantitative expression of APP and Abeta immunolabeling in ocular hypertensive and control retinas were graded in a masked fashion and compared.APP and Abeta immunoreactivity was found in the pia/dura, optic nerve (ON), and RGC layer of ocular hypertensive retinas, whereas APP and Abeta immunoreactivity in the contralateral control eyes was detected only in the pia/dura. Comparison of ocular hypertensive and control eyes for Abeta immunolabeling was significant in the ON and RGC layer (p < 0.05) whereas no significant difference was found when compared for APP staining.High Abeta and APP levels were seen in ocular hypertensive retinas, probably due to abnormal APP-splicing in the presence of elevated IOP.

Full Text

Duke Authors

Cited Authors

  • Kipfer-Kauer, A; McKinnon, SJ; Frueh, BE; Goldblum, D

Published Date

  • September 2010

Published In

Volume / Issue

  • 35 / 9

Start / End Page

  • 828 - 834

PubMed ID

  • 20795865

Pubmed Central ID

  • 20795865

Electronic International Standard Serial Number (EISSN)

  • 1460-2202

International Standard Serial Number (ISSN)

  • 0271-3683

Digital Object Identifier (DOI)

  • 10.3109/02713683.2010.494240

Language

  • eng