关键词: Canine models Cell cycle Hippo pathway Photoreceptor degeneration Photoreceptor mitosis erd rcd1 xlpra2

Mesh : Age Factors Animals Cell Proliferation / genetics Cyclins / genetics Dog Diseases / genetics Dogs E2F1 Transcription Factor / genetics Genes, cdc Mutation Phosphoproteins / genetics Photoreceptor Cells / pathology Protein Serine-Threonine Kinases / genetics Retina / pathology Retinal Degeneration / genetics veterinary Retinoblastoma Protein / genetics

来  源:   DOI:10.1186/s12864-016-2477-9   PDF(Sci-hub)

Abstract:
BACKGROUND: Mitotic terminally differentiated photoreceptors (PRs) are observed in early retinal degeneration (erd), an inherited canine retinal disease driven by mutations in the NDR kinase STK38L (NDR2).
RESULTS: We demonstrate that a similar proliferative response, but of lower magnitude, occurs in two other early onset disease models, X-linked progressive retinal atrophy 2 (xlpra2) and rod cone dysplasia 1 (rcd1). Proliferating cells are rod PRs, and not microglia or Müller cells. Expression of the cell cycle related genes RB1 and E2F1 as well as CDK2,4,6 was up-regulated, but changes were mutation-specific. Changes in cyclin expression differed across all genes, diseases and time points analyzed, although CCNA1 and CCNE1 expression increased with age in the three models suggesting that there is a dysregulation of cell cycle gene expression in all three diseases. Unique to erd, however, are mutation-specific changes in the expression of NDR kinases and Hippo signaling members with increased expression of MOB1 and LATS1 in the newly generated hybrid rod/S-cones.
CONCLUSIONS: Our data raise the intriguing possibility that terminally differentiated normal PRs are kept from dividing by NDR2-MOB1 interaction. Furthermore, they provide the framework for the selection of candidate genes for further investigation as potential targets of therapy.
摘要:
暂无翻译
公众号