Yap haploinsufficiency leads to Müller cell dysfunction and late-onset cone dystrophy.

Abstract:

:Hippo signalling regulates eye growth during embryogenesis through its effectors YAP and TAZ. Taking advantage of a Yap heterozygous mouse line, we here sought to examine its function in adult neural retina, where YAP expression is restricted to Müller glia. We first discovered an unexpected temporal dynamic of gene compensation. At postnatal stages, Taz upregulation occurs, leading to a gain of function-like phenotype characterised by EGFR signalling potentiation and delayed cell-cycle exit of retinal progenitors. In contrast, Yap+/- adult retinas no longer exhibit TAZ-dependent dosage compensation. In this context, Yap haploinsufficiency in aged individuals results in Müller glia dysfunction, late-onset cone degeneration, and reduced cone-mediated visual response. Alteration of glial homeostasis and altered patterns of cone opsins were also observed in Müller cell-specific conditional Yap-knockout aged mice. Together, this study highlights a novel YAP function in Müller cells for the maintenance of retinal tissue homeostasis and the preservation of cone integrity. It also suggests that YAP haploinsufficiency should be considered and explored as a cause of cone dystrophies in human.

journal_name

Cell Death Dis

journal_title

Cell death & disease

authors

Masson C,García-García D,Bitard J,Grellier ÉK,Roger JE,Perron M

doi

10.1038/s41419-020-02860-9

subject

Has Abstract

pub_date

2020-08-14 00:00:00

pages

631

issue

8

issn

2041-4889

pii

10.1038/s41419-020-02860-9

journal_volume

11

pub_type

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