Anti-WDR19 monoclonal antibody Made to order

In the last 10 years, the primary cilia machinery has been implicated in more than a dozen disorders united as ciliopathies, including skeletal dysplasias, such as Jeune syndrome and short rib-polydactyly type III. Indeed, primary cilia play a vital role in transduction of signals in the hedgehog pathway that is especially important in skeletal development. In this review, we focus on skeletal conditions belonging to the ciliopathy group: the short rib-polydactyly group (SRPs) that includes VermaNaumoff syndrome (SRP type III), Majewski syndrome (SRP type II), Jeune syndrome (ATD), as well as Ellisvan Creveld syndrome (EVC), the Sensenbrenner syndrome, and, finally, Weyers acrofacial dysostosis. Today, 10 different genes have been identified as responsible for seven skeletal ciliopathies. Mutations have been identified in dynein motor (DYNC2H1), in intraflagellar transport (IFT) complexes (IFT80, IFT122, IFT43, WDR35, WDR19, and TTC21B) as well as in genes responsible for the basal body (NEK1, EVC, and EVC2). The wide clinical variability observed for an individual ciliopathy gene supports the development of exome strategy specifically dedicated to cilia genes to identify mutations in this particularly heterogeneous group of disorders. (C) 2012 Wiley Periodicals, Inc.

We describe a consanguineous Iraqi family with Leber congenital arnaurosis (LCA), Jouber syndrome (JBTS), and polycystic kidney disease (PI(I)). Targeted next-generation sequencing for excluding mutations in known LCA and JBTS genes, homozygosity mapping, and whole-exome sequencing identified a homozygous misnse variant, c.317G>C (p.Arg106Pro), in POC1B, a gene essential for ciliogenesis, basal body, and centrosome integrity. In silico modeling suggested a requirement of p.Arg106Pro(POCIB) for the formation of the third WI)40 repeat and a protein interaction interface. In human and mouse retina, POC1B localized to the basal body and centriole adjacent to the connecting cilium of photoreceptors and in synapses of the outer plexiform layer. Knockdown of Poclb in zebrafish caused cystic kidneys and retinal degeneration with shortened and reduced photor p or connecting cilia, compatible with the human syndromic ciliopathy. A recent study describes hotnozygosfor p.Arg106PrnPociB in a family with nonsyndromic cone-rod dystrophy. The phenotype associated with homozygous p.Arg106Propocth may thus be highly variable, analogous to homozygous p.Lett710Ser in WDR19 causing either isolated retinitis pigmentosa or Jeune syndrome. Our study indicates that POC1B is required for retinal ingrity, and we propose POC1B mutations as a probable cause for JBTS with severe PKD.