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The histone H3K36 demethylase Fbxl11 plays pivotal roles in the development of retinal late-born cell types |
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| Authors: | Toshiro Iwagawa Masaya Fukushima Shigeru Takeuchi Yuichi Kawamura Yuko Aihara Manabu Ozawa Nayuta Yakushiji-Kaminatsui Makoto Aihara Haruhiko Koseki Yutaka Suzuki Sumiko Watanabe |
| Affiliation: | 1. Department of Retinal Biology and Pathology, University of Tokyo Hospital, University of Tokyo, Tokyo, Japan Department of Molecular and Developmental Biology, Institute of Medical Science, University of Tokyo, Tokyo, Japan;2. Department of Retinal Biology and Pathology, University of Tokyo Hospital, University of Tokyo, Tokyo, Japan Department of Molecular and Developmental Biology, Institute of Medical Science, University of Tokyo, Tokyo, Japan Department of Ophthalmology, Graduate school of Medicine, University of Tokyo, Tokyo, Japan;3. Department of Molecular and Developmental Biology, Institute of Medical Science, University of Tokyo, Tokyo, Japan;4. Laboratory of Reproductive Systems Biology, The Institute of Medical Science, University of Tokyo, Tokyo, Japan;5. Laboratory for Developmental Genetics, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan;6. Department of Ophthalmology, Graduate school of Medicine, University of Tokyo, Tokyo, Japan;7. Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba, Japan;8. Department of Retinal Biology and Pathology, University of Tokyo Hospital, University of Tokyo, Tokyo, Japan |
| Abstract: | Histone methylation plays a vital role in retinal development. However, the role of histone H3K36 methylation in retinal development is not clear. We examined the role of H3K36 methylation by loss-of-function analysis of H3K36me1/2 demethylases, Fbxl10, and Fbxl11. We analyzed the effect of knockout of these genes in the developing and mature retina on retinal development. Knockout of Fbxl10 specifically in the developing retina did not result in gross developmental abnormalities. Although adult rod photoreceptor-specific knockout of Fbxl11 in mature retinas did not result in morphological abnormalities, Fbxl11 knockout in developing retinas increased apoptosis, suppressed the proliferation of retinal progenitor cells, and resulted in microphthalmia. Morphological analysis revealed perturbed differentiation of rod photoreceptor and bipolar cells. RNA-seq of retinas at P7 showed markedly decreased expression of genes characterizing rod photoreceptor and bipolar cells in Fbxl11-knockout retinas. In addition, perturbation of alternative splicing increased intron retention in Fbxl11-knockout retinas. Genome-wide evaluation of the H3K36 methylation status revealed that Fbxl11 knockout altered the distribution of H3K36me2/3 in genes important for rod photoreceptor development. Taken together, we show that Fbxl11 plays pivotal roles in the development of retinal late-born cell types and may contribute to tight control of H3K36 methylation during retinal development. |
| Keywords: | development H3K36 histone methylation mouse retina |