Low levels of human HIP14 are sufficient to rescue neuropathological, behavioural, and enzymatic defects due to loss of murine HIP14 in Hip14-/- mice

Huntingtin Interacting Protein 14 (HIP14) is a palmitoyl acyl transferase (PAT) that was first identified due to altered interaction with mutant huntingtin, the protein responsible for Huntington Disease (HD). HIP14 palmitoylates a specific set of neuronal substrates critical at the synapse, and dow...

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Veröffentlicht in:PloS one 2012-05, Vol.7 (5), p.e36315-e36315
Hauptverfasser: Young, Fiona B, Franciosi, Sonia, Spreeuw, Amanda, Deng, Yu, Sanders, Shaun, Tam, Natalie C M, Huang, Kun, Singaraja, Roshni R, Zhang, Weining, Bissada, Nagat, Kay, Chris, Hayden, Michael R
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container_issue 5
container_start_page e36315
container_title PloS one
container_volume 7
creator Young, Fiona B
Franciosi, Sonia
Spreeuw, Amanda
Deng, Yu
Sanders, Shaun
Tam, Natalie C M
Huang, Kun
Singaraja, Roshni R
Zhang, Weining
Bissada, Nagat
Kay, Chris
Hayden, Michael R
description Huntingtin Interacting Protein 14 (HIP14) is a palmitoyl acyl transferase (PAT) that was first identified due to altered interaction with mutant huntingtin, the protein responsible for Huntington Disease (HD). HIP14 palmitoylates a specific set of neuronal substrates critical at the synapse, and downregulation of HIP14 by siRNA in vitro results in increased cell death in neurons. We previously reported that mice lacking murine Hip14 (Hip14-/-) share features of HD. In the current study, we have generated human HIP14 BAC transgenic mice and crossed them to the Hip14-/- model in order to confirm that the defects seen in Hip14-/- mice are in fact due to loss of Hip14. In addition, we sought to determine whether human HIP14 can provide functional compensation for loss of murine Hip14. We demonstrate that despite a relative low level of expression, as assessed via Western blot, BAC-derived human HIP14 compensates for deficits in neuropathology, behavior, and PAT enzyme function seen in the Hip14-/- model. Our findings yield important insights into HIP14 function in vivo.
doi_str_mv 10.1371/journal.pone.0036315
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HIP14 palmitoylates a specific set of neuronal substrates critical at the synapse, and downregulation of HIP14 by siRNA in vitro results in increased cell death in neurons. We previously reported that mice lacking murine Hip14 (Hip14-/-) share features of HD. In the current study, we have generated human HIP14 BAC transgenic mice and crossed them to the Hip14-/- model in order to confirm that the defects seen in Hip14-/- mice are in fact due to loss of Hip14. In addition, we sought to determine whether human HIP14 can provide functional compensation for loss of murine Hip14. We demonstrate that despite a relative low level of expression, as assessed via Western blot, BAC-derived human HIP14 compensates for deficits in neuropathology, behavior, and PAT enzyme function seen in the Hip14-/- model. Our findings yield important insights into HIP14 function in vivo.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>22649491</pmid><doi>10.1371/journal.pone.0036315</doi><tpages>e36315</tpages><oa>free_for_read</oa></addata></record>
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subjects Acyltransferases - deficiency
Acyltransferases - genetics
Acyltransferases - metabolism
Acyltransferases - pharmacology
Adaptor Proteins, Signal Transducing - genetics
Adaptor Proteins, Signal Transducing - metabolism
Adaptor Proteins, Signal Transducing - pharmacology
Alzheimer's disease
Analysis of Variance
Animals
Bacterial artificial chromosomes
Biology
Blotting, Western
Body Weight
Cell death
Chromosomes, Artificial, Bacterial - genetics
Crosses, Genetic
Defects
DNA Primers - genetics
Enzymes
Genetic engineering
Genetics
Human behavior
Humans
Huntingtin
Huntington's disease
Huntingtons disease
Immunohistochemistry
Lipoylation
Locomotion - drug effects
Low level
Medicine
Mice
Mice, Knockout
Mice, Transgenic
Mutagenesis
Mutation
Nerve Tissue Proteins - genetics
Nerve Tissue Proteins - metabolism
Nerve Tissue Proteins - pharmacology
Neurophysiology
Pathogenesis
Polymerase Chain Reaction
Protein expression
Proteins
Real-Time Polymerase Chain Reaction
Rotarod Performance Test
siRNA
Substrates
Synapses
Transgenic mice
title Low levels of human HIP14 are sufficient to rescue neuropathological, behavioural, and enzymatic defects due to loss of murine HIP14 in Hip14-/- mice
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