A stop codon mutation in SCN9A causes lack of pain sensation
The general lack of pain experience is a rare occurrence in humans, and the molecular causes for this phenotype are not well understood. Here we have studied a Canadian family from Newfoundland with members that exhibit a congenital inability to experience pain. We have mapped the locus to a 13.7 Mb...
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fthighwire:oai:open-archive.highwire.org:hmg:ddm160v2 2023-05-15T17:22:42+02:00 A stop codon mutation in SCN9A causes lack of pain sensation Ahmad, Sultan Dahllund, Leif Eriksson, Anders B. Hellgren, Dennis Karlsson, Urban Lund, Per-Eric Meijer, Inge A. Meury, Luc Mills, Tracy Moody, Adrian Morinville, Anne Morten, John O'Donnell, Dajan Raynoschek, Carina Salter, Hugh Rouleau, Guy A. Krupp, Johannes J. 2007-07-06 07:48:33.0 text/html http://hmg.oxfordjournals.org/cgi/content/short/ddm160v2 https://doi.org/10.1093/hmg/ddm160 en eng Oxford University Press http://hmg.oxfordjournals.org/cgi/content/short/ddm160v2 http://dx.doi.org/10.1093/hmg/ddm160 Copyright (C) 2007, Oxford University Press Article TEXT 2007 fthighwire https://doi.org/10.1093/hmg/ddm160 2013-05-27T20:53:02Z The general lack of pain experience is a rare occurrence in humans, and the molecular causes for this phenotype are not well understood. Here we have studied a Canadian family from Newfoundland with members that exhibit a congenital inability to experience pain. We have mapped the locus to a 13.7 Mb region on chromosome 2q (2q24.3 – 2q31.1). Screening of candidate genes in this region identified a protein-truncating mutation in SCN9A , which encodes for the voltage-gated sodium channel Na v 1.7. The mutation is a C to A transversion at nucleotide 984 transforming the codon for tyrosine 328 to a stop codon. The predicted product lacks all pore-forming regions of Na v 1.7. Indeed, expression of this altered gene in a cell line did not produce functional responses, nor did it cause compensatory effects on endogenous voltage-gated sodium currents when expressed in ND7/23 cells. Because a homozygous knock-out of Na v 1.7 in mice has been shown to be lethal, we explored why a deficiency of Na v 1.7 is non-lethal in humans. Expression studies in monkey, human, mouse and rat tissue indicated species-differences in the Na v 1.7 expression profile. Whereas in rodents the channel was strongly expressed in hypothalamic nuclei, only weak mRNA levels were detected in this area in primates. Furthermore, primate pituitary and adrenal glands were devoid of signal whereas these two glands were mRNA-positive in rodents. This species difference may explain the non-lethality of the observed mutation in humans. Our data further establishes Na v 1.7 as a critical element of peripheral nociception in humans. Text Newfoundland HighWire Press (Stanford University) Human Molecular Genetics 16 17 2114 2121 |
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Article Ahmad, Sultan Dahllund, Leif Eriksson, Anders B. Hellgren, Dennis Karlsson, Urban Lund, Per-Eric Meijer, Inge A. Meury, Luc Mills, Tracy Moody, Adrian Morinville, Anne Morten, John O'Donnell, Dajan Raynoschek, Carina Salter, Hugh Rouleau, Guy A. Krupp, Johannes J. A stop codon mutation in SCN9A causes lack of pain sensation |
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Article |
description |
The general lack of pain experience is a rare occurrence in humans, and the molecular causes for this phenotype are not well understood. Here we have studied a Canadian family from Newfoundland with members that exhibit a congenital inability to experience pain. We have mapped the locus to a 13.7 Mb region on chromosome 2q (2q24.3 – 2q31.1). Screening of candidate genes in this region identified a protein-truncating mutation in SCN9A , which encodes for the voltage-gated sodium channel Na v 1.7. The mutation is a C to A transversion at nucleotide 984 transforming the codon for tyrosine 328 to a stop codon. The predicted product lacks all pore-forming regions of Na v 1.7. Indeed, expression of this altered gene in a cell line did not produce functional responses, nor did it cause compensatory effects on endogenous voltage-gated sodium currents when expressed in ND7/23 cells. Because a homozygous knock-out of Na v 1.7 in mice has been shown to be lethal, we explored why a deficiency of Na v 1.7 is non-lethal in humans. Expression studies in monkey, human, mouse and rat tissue indicated species-differences in the Na v 1.7 expression profile. Whereas in rodents the channel was strongly expressed in hypothalamic nuclei, only weak mRNA levels were detected in this area in primates. Furthermore, primate pituitary and adrenal glands were devoid of signal whereas these two glands were mRNA-positive in rodents. This species difference may explain the non-lethality of the observed mutation in humans. Our data further establishes Na v 1.7 as a critical element of peripheral nociception in humans. |
format |
Text |
author |
Ahmad, Sultan Dahllund, Leif Eriksson, Anders B. Hellgren, Dennis Karlsson, Urban Lund, Per-Eric Meijer, Inge A. Meury, Luc Mills, Tracy Moody, Adrian Morinville, Anne Morten, John O'Donnell, Dajan Raynoschek, Carina Salter, Hugh Rouleau, Guy A. Krupp, Johannes J. |
author_facet |
Ahmad, Sultan Dahllund, Leif Eriksson, Anders B. Hellgren, Dennis Karlsson, Urban Lund, Per-Eric Meijer, Inge A. Meury, Luc Mills, Tracy Moody, Adrian Morinville, Anne Morten, John O'Donnell, Dajan Raynoschek, Carina Salter, Hugh Rouleau, Guy A. Krupp, Johannes J. |
author_sort |
Ahmad, Sultan |
title |
A stop codon mutation in SCN9A causes lack of pain sensation |
title_short |
A stop codon mutation in SCN9A causes lack of pain sensation |
title_full |
A stop codon mutation in SCN9A causes lack of pain sensation |
title_fullStr |
A stop codon mutation in SCN9A causes lack of pain sensation |
title_full_unstemmed |
A stop codon mutation in SCN9A causes lack of pain sensation |
title_sort |
stop codon mutation in scn9a causes lack of pain sensation |
publisher |
Oxford University Press |
publishDate |
2007 |
url |
http://hmg.oxfordjournals.org/cgi/content/short/ddm160v2 https://doi.org/10.1093/hmg/ddm160 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
http://hmg.oxfordjournals.org/cgi/content/short/ddm160v2 http://dx.doi.org/10.1093/hmg/ddm160 |
op_rights |
Copyright (C) 2007, Oxford University Press |
op_doi |
https://doi.org/10.1093/hmg/ddm160 |
container_title |
Human Molecular Genetics |
container_volume |
16 |
container_issue |
17 |
container_start_page |
2114 |
op_container_end_page |
2121 |
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1766109519488745472 |