Mutations in DDHD2, Encoding an Intracellular Phospholipase A^sub 1^, Cause a Recessive Form of Complex Hereditary Spastic Paraplegia

We report on four families affected by a clinical presentation of complex hereditary spastic paraplegia (HSP) due to recessive mutations in DDHD2, encoding one of the three mammalian intracellular phospholipases A1 (iPLA1). The core phenotype of this HSP syndrome consists of very early-onset (

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Veröffentlicht in:American journal of human genetics 2012-12, Vol.91 (6), p.1073
Hauptverfasser: Schuurs-Hoeijmakers, Janneke HM, Geraghty, Michael T, Kamsteeg, Erik-Jan, Ben-Salem, Salma, de Bot, Susanne T, Nijhof, Bonnie, van de Vondervoort, Ilse IGM, van der Graaf, Marinette, Nobau, Anna Castells, Otte-Höller, Irene, Vermeer, Sascha, Smith, Amanda C, Humphreys, Peter, Schwartzentruber, Jeremy, Ali, Bassam R, Al-Yahyaee, Saeed A, Tariq, Said, Pramathan, Thachillath, Bayoumi, Riad, Kremer, Hubertus PH, van de Warrenburg, Bart P, van den Akker, Willem MR, Gilissen, Christian, Veltman, Joris A, Janssen, Irene M, Vulto-van Silfhout, Anneke T, van der Velde-Visser, Saskia, Lefeber, Dirk J, Diekstra, Adinda, Erasmus, Corrie E, Willemsen, Michèl A, Vissers, Lisenka ELM, Lammens, Martin, van Bokhoven, Hans, Brunner, Han G, Wevers, Ron A, Schenck, Annette, Al-Gazali, Lihadh, de Vries, Bert BA, de Brouwer, Arjan PM
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container_issue 6
container_start_page 1073
container_title American journal of human genetics
container_volume 91
creator Schuurs-Hoeijmakers, Janneke HM
Geraghty, Michael T
Kamsteeg, Erik-Jan
Ben-Salem, Salma
de Bot, Susanne T
Nijhof, Bonnie
van de Vondervoort, Ilse IGM
van der Graaf, Marinette
Nobau, Anna Castells
Otte-Höller, Irene
Vermeer, Sascha
Smith, Amanda C
Humphreys, Peter
Schwartzentruber, Jeremy
Ali, Bassam R
Al-Yahyaee, Saeed A
Tariq, Said
Pramathan, Thachillath
Bayoumi, Riad
Kremer, Hubertus PH
van de Warrenburg, Bart P
van den Akker, Willem MR
Gilissen, Christian
Veltman, Joris A
Janssen, Irene M
Vulto-van Silfhout, Anneke T
van der Velde-Visser, Saskia
Lefeber, Dirk J
Diekstra, Adinda
Erasmus, Corrie E
Willemsen, Michèl A
Vissers, Lisenka ELM
Lammens, Martin
van Bokhoven, Hans
Brunner, Han G
Wevers, Ron A
Schenck, Annette
Al-Gazali, Lihadh
de Vries, Bert BA
de Brouwer, Arjan PM
description We report on four families affected by a clinical presentation of complex hereditary spastic paraplegia (HSP) due to recessive mutations in DDHD2, encoding one of the three mammalian intracellular phospholipases A1 (iPLA1). The core phenotype of this HSP syndrome consists of very early-onset (
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The core phenotype of this HSP syndrome consists of very early-onset (&lt;2 years) spastic paraplegia, intellectual disability, and a specific pattern of brain abnormalities on cerebral imaging. An essential role for DDHD2 in the human CNS, and perhaps more specifically in synaptic functioning, is supported by a reduced number of active zones at synaptic terminals in Ddhd-knockdown Drosophila models. All identified mutations affect the protein's DDHD domain, which is vital for its phospholipase activity. In line with the function of DDHD2 in lipid metabolism and its role in the CNS, an abnormal lipid peak indicating accumulation of lipids was detected with cerebral magnetic resonance spectroscopy, which provides an applicable diagnostic biomarker that can distinguish the DDHD2 phenotype from other complex HSP phenotypes. We show that mutations in DDHD2 cause a specific complex HSP subtype (SPG54), thereby linking a member of the PLA1 family to human neurologic disease. 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The core phenotype of this HSP syndrome consists of very early-onset (&lt;2 years) spastic paraplegia, intellectual disability, and a specific pattern of brain abnormalities on cerebral imaging. An essential role for DDHD2 in the human CNS, and perhaps more specifically in synaptic functioning, is supported by a reduced number of active zones at synaptic terminals in Ddhd-knockdown Drosophila models. All identified mutations affect the protein's DDHD domain, which is vital for its phospholipase activity. In line with the function of DDHD2 in lipid metabolism and its role in the CNS, an abnormal lipid peak indicating accumulation of lipids was detected with cerebral magnetic resonance spectroscopy, which provides an applicable diagnostic biomarker that can distinguish the DDHD2 phenotype from other complex HSP phenotypes. We show that mutations in DDHD2 cause a specific complex HSP subtype (SPG54), thereby linking a member of the PLA1 family to human neurologic disease. [PUBLICATION ABSTRACT]</abstract><cop>Chicago</cop><pub>Cell Press</pub></addata></record>
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subjects Enzymes
Genetic disorders
Genotype & phenotype
Insects
Mutation
Neurological disorders
NMR
Nuclear magnetic resonance
title Mutations in DDHD2, Encoding an Intracellular Phospholipase A^sub 1^, Cause a Recessive Form of Complex Hereditary Spastic Paraplegia
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