Abstract
Nucleotide repeat expansions are frequent causes of neurodegeneration but little is known about the mechanisms leading to neuronal degeneration. We recently identified a biallelic intronic AAGGG nucleotide repeat expansion in the replication-factor-C subunit-1 (RFC1) as a common cause of ataxia (Cortese-et-al, Nature Genetics, April2019). RFC1 is known to play a key role in DNA damage recognition and recruitment of DNA repair enzymes and AAGGG expansion is not loss-of-function. The objective of the project is to investigate the 100,000 genomes resource for novel neurodegeneration associated expansions and in cell culture models, characterise neurodegeneration caused by RFC1 AAGGG and newly identified expansions.
References
Biallelic expansion of an intronic repeat in RFC1 is a common cause of late-onset ataxia.
Cortese A, Simone R, Sullivan R, Vandrovcova J, Tariq H, Yau WY, Humphrey J, Jaunmuktane Z, Sivakumar P, Polke J, Ilyas M, Tribollet E, Tomaselli PJ, Devigili G, Callegari I, Versino M, Salpietro V, Efthymiou S, Kaski D, Wood NW, Andrade NS, Buglo E, Rebelo A, Rossor AM, Bronstein A, Fratta P, Marques WJ, Züchner S, Reilly MM, Houlden H. Nat Genet. 2019 Apr;51(4):649-658. doi: 10.1038/s41588-019-0372-4. Epub 2019 Mar 29.
Germline selection shapes human mitochondrial DNA diversity.
Wei W, Tuna S, Keogh MJ, Smith KR, Aitman TJ, Beales PL, Bennett DL, Gale DP, Bitner-Glindzicz MAK, Black GC, Brennan P, Elliott P, Flinter FA, Floto RA, Houlden H, Irving M, Koziell A, Maher ER, Markus HS, Morrell NW, Newman WG, Roberts I, Sayer JA, Smith KGC, Taylor JC, Watkins H, Webster AR, Wilkie AOM, Williamson C; NIHR BioResource–Rare Diseases; 100,000 Genomes Project–Rare Diseases Pilot, Ashford S, Penkett CJ, Stirrups KE, Rendon A, Ouwehand WH, Bradley JR, Raymond FL, Caulfield M, Turro E, Chinnery PF. Science. 2019 May 24;364(6442).
Mutations in ACTL6B Cause Neurodevelopmental Deficits and Epilepsy and Lead to Loss of Dendrites in Human Neurons.
Bell S, Rousseau J, Peng H, Aouabed Z, Priam P, Theroux JF, Jefri M, Tanti A, Wu H, Kolobova I, Silviera H, Manzano-Vargas K, Ehresmann S, Hamdan FF, Hettige N, Zhang X, Antonyan L, Nassif C, Ghaloul-Gonzalez L, Sebastian J, Vockley J, Begtrup AG, Wentzensen IM, Crunk A, Nicholls RD, Herman KC, Deignan JL, Al-Hertani W, Efthymiou S, Salpietro V, Miyake N, Makita Y, Matsumoto N, Østern R, Houge G, Hafström M, Fassi E, Houlden H, Klein Wassink-Ruiter JS, Nelson D, Goldstein A, Dabir T, van Gils J, Bourgeron T, Delorme R, Cooper GM, Martinez JE, Finnila CR, Carmant L, Lortie A, Oegema R, van Gassen K, Mehta SG, Huhle D, Abou Jamra R, Martin S, Brunner HG, Lindhout D, Au M, Graham JM Jr, Coubes C, Turecki G, Gravel S, Mechawar N, Rossignol E, Michaud JL, Lessard J, Ernst C, Campeau PM. Am J Hum Genet. 2019 May 2;104(5):815-834. doi: 10.1016/j.ajhg.2019.03.022. Epub 2019 Apr 25.
Mutations in the Neuronal Vesicular SNARE VAMP2 Affect Synaptic Membrane Fusion and Impair Human Neurodevelopment.
Salpietro V, Malintan NT, Llano-Rivas I, Spaeth CG, Efthymiou S, Striano P, Vandrovcova J, Cutrupi MC, Chimenz R, David E, Di Rosa G, Marce-Grau A, Raspall-Chaure M, Martin-Hernandez E, Zara F, Minetti C; Deciphering Developmental Disorders Study; SYNAPS Study Group, Bello OD, De Zorzi R, Fortuna S, Dauber A, Alkhawaja M, Sultan T, Mankad K, Vitobello A, Thomas Q, Mau-Them FT, Faivre L, Martinez-Azorin F, Prada CE, Macaya A, Kullmann DM, Rothman JE, Krishnakumar SS, Houlden H. Am J Hum Genet. 2019 Apr 4;104(4):721-730.
DNA repair in the trinucleotide repeat disorders.
Jones L, Houlden H, Tabrizi SJ. Lancet Neurol. 2017 Jan;16(1):88-96. doi: 10.1016/S1474-4422(16)30350-7. Review.