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  • 1
    Publication Date: 2014-02-01
    Description: Hereditary spastic paraplegias (HSPs) are neurodegenerative motor neuron diseases characterized by progressive age-dependent loss of corticospinal motor tract function. Although the genetic basis is partly understood, only a fraction of cases can receive a genetic diagnosis, and a global view of HSP is lacking. By using whole-exome sequencing in combination with network analysis, we identified 18 previously unknown putative HSP genes and validated nearly all of these genes functionally or genetically. The pathways highlighted by these mutations link HSP to cellular transport, nucleotide metabolism, and synapse and axon development. Network analysis revealed a host of further candidate genes, of which three were mutated in our cohort. Our analysis links HSP to other neurodegenerative disorders and can facilitate gene discovery and mechanistic understanding of disease.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4157572/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4157572/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Novarino, Gaia -- Fenstermaker, Ali G -- Zaki, Maha S -- Hofree, Matan -- Silhavy, Jennifer L -- Heiberg, Andrew D -- Abdellateef, Mostafa -- Rosti, Basak -- Scott, Eric -- Mansour, Lobna -- Masri, Amira -- Kayserili, Hulya -- Al-Aama, Jumana Y -- Abdel-Salam, Ghada M H -- Karminejad, Ariana -- Kara, Majdi -- Kara, Bulent -- Bozorgmehri, Bita -- Ben-Omran, Tawfeg -- Mojahedi, Faezeh -- Mahmoud, Iman Gamal El Din -- Bouslam, Naima -- Bouhouche, Ahmed -- Benomar, Ali -- Hanein, Sylvain -- Raymond, Laure -- Forlani, Sylvie -- Mascaro, Massimo -- Selim, Laila -- Shehata, Nabil -- Al-Allawi, Nasir -- Bindu, P S -- Azam, Matloob -- Gunel, Murat -- Caglayan, Ahmet -- Bilguvar, Kaya -- Tolun, Aslihan -- Issa, Mahmoud Y -- Schroth, Jana -- Spencer, Emily G -- Rosti, Rasim O -- Akizu, Naiara -- Vaux, Keith K -- Johansen, Anide -- Koh, Alice A -- Megahed, Hisham -- Durr, Alexandra -- Brice, Alexis -- Stevanin, Giovanni -- Gabriel, Stacy B -- Ideker, Trey -- Gleeson, Joseph G -- HHSN268200782096C/PHS HHS/ -- HHSN268201100011/PHS HHS/ -- N01-CO-12400/CO/NCI NIH HHS/ -- P01 HD070494/HD/NICHD NIH HHS/ -- P01HD070494/HD/NICHD NIH HHS/ -- P30NS047101/NS/NINDS NIH HHS/ -- R01NS041537/NS/NINDS NIH HHS/ -- R01NS048453/NS/NINDS NIH HHS/ -- R01NS052455/NS/NINDS NIH HHS/ -- U54 HG006504/HG/NHGRI NIH HHS/ -- U54HG003067/HG/NHGRI NIH HHS/ -- U54HG006504/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2014 Jan 31;343(6170):506-11. doi: 10.1126/science.1247363.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, University of California, San Diego, La Jolla, CA 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24482476" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/physiology ; Biological Transport/genetics ; Cohort Studies ; Exome/*genetics ; Gene Regulatory Networks ; *Genetic Association Studies ; Humans ; Motor Neuron Disease/*genetics ; Mutation ; Neurons/*metabolism ; Nucleotides/genetics/metabolism ; Pyramidal Tracts/*metabolism ; Sequence Analysis, DNA ; Spastic Paraplegia, Hereditary/*genetics ; Synapses/physiology ; Transcriptome ; Zebrafish
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
  • 3
    Publication Date: 2018-10-02
    Description: A number of autoimmunity-associated MHC class II proteins interact only weakly with the invariant chain–derived class II–associated invariant chain peptide (CLIP). CLIP dissociates rapidly from I-A g7 even in the absence of DM, and this property is related to the type 1 diabetes–associated β57 polymorphism. We generated knock-in non-obese diabetic (NOD) mice with a single amino acid change in the CLIP segment of the invariant chain in order to moderately slow CLIP dissociation from I-A g7 . These knock-in mice had a significantly reduced incidence of spontaneous type 1 diabetes and diminished islet infiltration by CD4 T cells, in particular T cells specific for fusion peptides generated by covalent linkage of proteolytic fragments within β cell secretory granules. Rapid CLIP dissociation enhanced the presentation of such extracellular peptides, thus bypassing the conventional MHC class II antigen-processing pathway. Autoimmunity-associated MHC class II polymorphisms therefore not only modify binding of self-peptides, but also alter the biochemistry of peptide acquisition.
    Keywords: Autoimmunity
    Print ISSN: 0022-1007
    Electronic ISSN: 1540-9538
    Topics: Medicine
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