title: DNA replication stress underlies renal phenotypes in CEP290-associated Joubert syndrome.
abstract: Juvenile ciliopathy syndromes that are associated with renal cysts and premature renal failure are commonly the result of mutations in the gene encoding centrosomal protein CEP290. In addition to centrosomes and the transition zone at the base of the primary cilium, CEP290 also localizes to the nucleus; however, the nuclear function of CEP290 is unknown. Here, we demonstrate that reduction of cellular CEP290 in primary human and mouse kidney cells as well as in zebrafish embryos leads to enhanced DNA damage signaling and accumulation of DNA breaks ex vivo and in vivo. Compared with those from WT mice, primary kidney cells from Cep290-deficient mice exhibited supernumerary centrioles, decreased replication fork velocity, fork asymmetry, and increased levels of cyclin-dependent kinases (CDKs). Treatment of Cep290-deficient cells with CDK inhibitors rescued DNA damage and centriole number. Moreover, the loss of primary cilia that results from CEP290 dysfunction was rescued in 3D cell culture spheroids of primary murine kidney cells after exposure to CDK inhibitors. Together, our results provide a link between CEP290 and DNA replication stress and suggest CDK inhibition as a potential treatment strategy for a wide range of ciliopathy syndromes.
authors: Gisela G
authors: GG
authors: Slaats
authors: Joshua C
authors: JC
authors: Saldivar
authors: Julien
authors: J
authors: Bacal
authors: Michelle K
authors: MK
authors: Zeman
authors: Andrew C
authors: AC
authors: Kile
authors: Ann Marie
authors: AM
authors: Hynes
authors: Shalabh
authors: S
authors: Srivastava
authors: Jekaterina
authors: J
authors: Nazmutdinova
authors: Krista
authors: K
authors: den Ouden
authors: Miriam S
authors: MS
authors: Zagers
authors: Veronica
authors: V
authors: Foletto
authors: Marianne C
authors: MC
authors: Verhaar
authors: Colin
authors: C
authors: Miles
authors: John A
authors: JA
authors: Sayer
authors: Karlene A
authors: KA
authors: Cimprich
authors: Rachel H
authors: RH
authors: Giles
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D000818:Animals; D000951:Antigens, Neoplasm / Q000235:genetics / Q000378:metabolism*; D018797:Cell Cycle Proteins; D002460:Cell Line; D002502:Centrioles / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D002531:Cerebellum / Q000002:abnormalities* / Q000378:metabolism / Q000473:pathology; D003598:Cytoskeletal Proteins; D004249:DNA Damage; D004261:DNA Replication; D005124:Eye Abnormalities / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D006801:Humans; D007668:Kidney / Q000378:metabolism* / Q000473:pathology; D052177:Kidney Diseases, Cystic / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D051379:Mice; D008869:Microtubule-Associated Proteins / Q000235:genetics / Q000378:metabolism*; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D012160:Retina / Q000002:abnormalities* / Q000378:metabolism / Q000473:pathology; D015027:Zebrafish / Q000235:genetics / Q000378:metabolism*; D029961:Zebrafish Proteins / Q000235:genetics / Q000378:metabolism*
chemical_list: D000951:Antigens, Neoplasm; C559615:CEP290 protein, zebrafish; D018797:Cell Cycle Proteins; C493903:Cep290 protein, human; C513600:Cep290 protein, mouse; D003598:Cytoskeletal Proteins; D008869:Microtubule-Associated Proteins; D009363:Neoplasm Proteins; D009687:Nuclear Proteins; D029961:Zebrafish Proteins