Germline AGO2 mutations impair RNA interference and human neurological development. 2020

Davor Lessel, and Daniela M Zeitler, and Margot R F Reijnders, and Andriy Kazantsev, and Fatemeh Hassani Nia, and Alexander Bartholomäus, and Victoria Martens, and Astrid Bruckmann, and Veronika Graus, and Allyn McConkie-Rosell, and Marie McDonald, and Bernarda Lozic, and Ee-Shien Tan, and Erica Gerkes, and Jessika Johannsen, and Jonas Denecke, and Aida Telegrafi, and Evelien Zonneveld-Huijssoon, and Henny H Lemmink, and Breana W M Cham, and Tanja Kovacevic, and Linda Ramsdell, and Kimberly Foss, and Diana Le Duc, and Diana Mitter, and Steffen Syrbe, and Andreas Merkenschlager, and Margje Sinnema, and Bianca Panis, and Joanna Lazier, and Matthew Osmond, and Taila Hartley, and Jeremie Mortreux, and Tiffany Busa, and Chantal Missirian, and Pankaj Prasun, and Sabine Lüttgen, and Ilaria Mannucci, and Ivana Lessel, and Claudia Schob, and Stefan Kindler, and John Pappas, and Rachel Rabin, and Marjolein Willemsen, and Thatjana Gardeitchik, and Katharina Löhner, and Patrick Rump, and Kerith-Rae Dias, and Carey-Anne Evans, and Peter Ian Andrews, and Tony Roscioli, and Han G Brunner, and Chieko Chijiwa, and M E Suzanne Lewis, and Rami Abou Jamra, and David A Dyment, and Kym M Boycott, and Alexander P A Stegmann, and Christian Kubisch, and Ene-Choo Tan, and Ghayda M Mirzaa, and Kirsty McWalter, and Tjitske Kleefstra, and Rolph Pfundt, and Zoya Ignatova, and Gunter Meister, and Hans-Jürgen Kreienkamp
Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany. d.lessel@uke.de.

ARGONAUTE-2 and associated miRNAs form the RNA-induced silencing complex (RISC), which targets mRNAs for translational silencing and degradation as part of the RNA interference pathway. Despite the essential nature of this process for cellular function, there is little information on the role of RISC components in human development and organ function. We identify 13 heterozygous mutations in AGO2 in 21 patients affected by disturbances in neurological development. Each of the identified single amino acid mutations result in impaired shRNA-mediated silencing. We observe either impaired RISC formation or increased binding of AGO2 to mRNA targets as mutation specific functional consequences. The latter is supported by decreased phosphorylation of a C-terminal serine cluster involved in mRNA target release, increased formation of dendritic P-bodies in neurons and global transcriptome alterations in patient-derived primary fibroblasts. Our data emphasize the importance of gene expression regulation through the dynamic AGO2-RNA association for human neuronal development.

UI MeSH Term Description Entries
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D009420 Nervous System The entire nerve apparatus, composed of a central part, the brain and spinal cord, and a peripheral part, the cranial and spinal nerves, autonomic ganglia, and plexuses. (Stedman, 26th ed) Nervous Systems,System, Nervous,Systems, Nervous
D009474 Neurons The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM. Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D010766 Phosphorylation The introduction of a phosphoryl group into a compound through the formation of an ester bond between the compound and a phosphorus moiety. Phosphorylations
D002648 Child A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL. Children
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D003712 Dendrites Extensions of the nerve cell body. They are short and branched and receive stimuli from other NEURONS. Dendrite
D005347 Fibroblasts Connective tissue cells which secrete an extracellular matrix rich in collagen and other macromolecules. Fibroblast
D005854 Germ Cells The reproductive cells in multicellular organisms at various stages during GAMETOGENESIS. Gamete,Gametes,Germ-Line Cells,Germ Line,Cell, Germ,Cell, Germ-Line,Cells, Germ,Cells, Germ-Line,Germ Cell,Germ Line Cells,Germ Lines,Germ-Line Cell
D006624 Hippocampus A curved elevation of GRAY MATTER extending the entire length of the floor of the TEMPORAL HORN of the LATERAL VENTRICLE (see also TEMPORAL LOBE). The hippocampus proper, subiculum, and DENTATE GYRUS constitute the hippocampal formation. Sometimes authors include the ENTORHINAL CORTEX in the hippocampal formation. Ammon Horn,Cornu Ammonis,Hippocampal Formation,Subiculum,Ammon's Horn,Hippocampus Proper,Ammons Horn,Formation, Hippocampal,Formations, Hippocampal,Hippocampal Formations,Hippocampus Propers,Horn, Ammon,Horn, Ammon's,Proper, Hippocampus,Propers, Hippocampus,Subiculums

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