Modeling Human Disease in Humans: The Ciliopathies

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Modeling Human Disease in Humans: The Ciliopathies Gaia Novarino, Naiara Akizu, Joseph G. Gleeson  Cell  Volume 147, Issue 1, Pages 70-79 (September 2011) DOI: 10.1016/j.cell.2011.09.014 Copyright © 2011 Elsevier Inc. Terms and Conditions

Figure 1 Human Genetic Interactions in the Ciliopathy Spectrum Diseased individuals are in color, with severity represented by darker shading. “Phenocopies” refers to the finding that patients with homozygous or compound heterozygous mutations in two different genes (i.e., AHI1 or INPP5E) can show indistinguishable JBTS phenotypes. Multiple allelism at the same locus indicates that mutations in a single gene (i.e., CEP290) can lead to various distinguishable phenotypes. “Modifiers” refers to evidence that potentially deleterious sequence changes in a gene like AHI1 can modify in quantifiable ways the phenotype observed in patients with NPHP1 mutations. (Black) Normal chromosome; (red) mutant chromosome. AHI1, abelson helper integration site 1; INPP5E, inositol polyphosphate-5-phosphatase E; CEP290, centrosomal protein 290 kDa; NPHP1, nephrocystin 1. BBS, Bardet-Biedl syndrome; JBTS, Joubert syndrome; LCA, Leber congenital amaurosis; MKS, Meckel syndrome; NPHP, nephronophthisis; RD, retinal dystrophy; SLS, Senior Loken syndrome. Cell 2011 147, 70-79DOI: (10.1016/j.cell.2011.09.014) Copyright © 2011 Elsevier Inc. Terms and Conditions

Figure 2 Phenotypic and Interactome Diversity of the Ciliopathies Based upon Major Organ Involvement (A) Disease is represented below by abbreviation, and involvement of major organ is listed above. (B) Major ciliopathy diseases (color coded by severity) and gene mutated in each condition (red) linked by black bar, with more common causes showing thicker lines. (C) The same gene map, now indicating evidence for direct interaction between protein products. Protein interaction networks identified from published data, demonstrating major clustering of interactions corresponding to disease networks. Note that genes causing a particular disorder tend to have products that interact, although there are many genes without known connections. Note that genes such as CEP290 that can cause several different diseases should serve as hubs but, to date, have few demonstrated physical interactions. BBS, Bardet-Biedl syndrome; JBTS, Joubert syndrome; LCA, Leber congenital amaurosis; MKS, Meckel syndrome; NPHP, nephronophthisis; OFD, Orofaciodigital syndrome; SLS, Senior Loken syndrome. Cell 2011 147, 70-79DOI: (10.1016/j.cell.2011.09.014) Copyright © 2011 Elsevier Inc. Terms and Conditions

Figure 3 Discovery Pipeline for Mechanism of Disease: Past and Future Paradigms (A) Former strategy to identify disease mechanisms, starting with ascertainment of pedigrees for linkage, disease mapping to a particular chromosomal locus, and candidate gene Sanger sequencing. Once a mutant gene was identified, animal models were created to understand the mechanism. (B) The future paradigm bypasses the need for informative pedigrees and disease mapping, instead going directly from patient ascertainment to genome sequencing and then to variant identification and expanding to identification of modifiers and mutational load. In parallel, patient-specific disease modeling using human cells coupled with protein interaction networks and therapeutic drug screening can further uncover disease mechanisms and help develop better treatments. Cell 2011 147, 70-79DOI: (10.1016/j.cell.2011.09.014) Copyright © 2011 Elsevier Inc. Terms and Conditions