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Vacuolar ATPases and Their Role in Vision

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Retinal Degenerative Diseases

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 801))

Abstract

Vacuolar ATPases (v-ATPases) hydrolyze adenosine triphospate (ATP) to pump protons across cell membranes. Mutations in v-ATPase subunits are implicated in three human disorders: distal renal tubular acidosis, osteopetrosis, and cutis laxa type II. In the eye, the role of v-ATPases is only emerging. Mutations in v-ATPase subunits are not linked to human blindness, but altered proton pump function may underlie ocular pathologies. For example, inhibition of v-ATPase by A2E may accentuate age-related macular degeneration (AMD). In animal models, v-ATPase mutations perturb the retinal pigment epithelium (RPE) and photoreceptor outer segment (OS) phagocytosis, an event linked to retinal degeneration. As the RPE plays essential roles in eye development and vision, the study of v-ATPase-induced RPE dysfunction may improve our understanding of RPE diseases.

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Abbreviations

AMD:

Age related macular degeneration

Ca2+ :

Calcium

CMZ:

Ciliary marginal zone

H2S:

Hydrogen sulphide

OKR:

Optokinetic response

OS:

Outer segment

RPE:

Retinal pigment epithelium

V-ATPase:

Vacuolar ATPase

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Correspondence to Breandan Kennedy .

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Shine, L., Kilty, C., Gross, J., Kennedy, B. (2014). Vacuolar ATPases and Their Role in Vision. In: Ash, J., Grimm, C., Hollyfield, J., Anderson, R., LaVail, M., Bowes Rickman, C. (eds) Retinal Degenerative Diseases. Advances in Experimental Medicine and Biology, vol 801. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-3209-8_13

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  • DOI: https://doi.org/10.1007/978-1-4614-3209-8_13

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  • Publisher Name: Springer, New York, NY

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