Graded Otx2 activities demonstrate dose-sensitive eye and retina phenotypes. (Articolo in rivista)

Type
Label
  • Graded Otx2 activities demonstrate dose-sensitive eye and retina phenotypes. (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1093/hmg/ddt562 (literal)
Alternative label
  • Bernard C, Kim HT, Ibad RT, Lee EJ, Simonutti M, Picaud S, Acampora D, Simeone A, Di Nardo AA, Prochiantz A, Moya KL, Kim JW. (2014)
    Graded Otx2 activities demonstrate dose-sensitive eye and retina phenotypes.
    in Human molecular genetics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Bernard C, Kim HT, Ibad RT, Lee EJ, Simonutti M, Picaud S, Acampora D, Simeone A, Di Nardo AA, Prochiantz A, Moya KL, Kim JW. (literal)
Pagina inizio
  • 1742 (literal)
Pagina fine
  • 1753 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • e pub Nov 2013 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 23 (literal)
Rivista
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  • 7 (literal)
Note
  • PubMe (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Collège de France, Center for Interdisciplinary Research in Biology, UMR CNRS 7241/INSERM U1050, 11 place Marcelin Berthelot, 75005 Paris, France; Labex Memolife, PSL Research University Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea UPMC Univ Paris 06, Institut de la vision; Paris, F-75012, France INSERM, U968, Paris, F-75012, France CNRS, UMR_7210, Paris, F-75012, France Fondation Ophtalmologique Adolphe de Rothschild, Paris, F-75019, France Institute of Genetics and Biophysics, Via Pietro Castellino 111, 80131 Napoli, Italy IRCCS Neuromed, 86077 Pozzilli (Is), Italy (literal)
Titolo
  • Graded Otx2 activities demonstrate dose-sensitive eye and retina phenotypes. (literal)
Abstract
  • In the human, mutations of OTX2 (Orthodenticle homeobox 2 transcription factor) translate into eye malformations of variable expressivity (even between the two eyes of the same individual) and incomplete penetrance, suggesting the existence of subtle thresholds in OTX2 activity. We have addressed this issue by analyzing retinal structure and function in six mutant mice with graded Otx2 activity: Otx2+/+, Otx2+/AA, Otx2+/GFP, Otx2AA/AA, Otx2AA/GFP and Otx2GFP/GFP. Null mice (Otx2GFP/GFP) fail to develop the head and are embryonic lethal, and compound heterozygous Otx2AA/GFP mice show a truncated head and die at birth. All other genotypes develop until adulthood. We analyzed eye structure and visual physiology in the genotypes that develop until adulthood and report that phenotype severity parallels Otx2 activity. Otx2+/AA are only mildly affected while Otx2+/GFP are more affected than Otx2+/AAbut less than Otx2AA/AA mice. Otx2AA/AA mice later manifest the most severe defects, with variable expressivity. Electrophysiological and histological analyses of the mouse retina revealed progressive death of bipolar cells and cone photoreceptors that is both Otx2 activity- and age-dependent with the same ranking of phenotypic severity. This study demonstrates the importance of gene dosage in the development of age-dependent pathologies and underscores the fact that small gene dosage differences can cause significant pathological states. (literal)
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