Acetylcholine receptor delta subunit mutations underlie a fast-channel myasthenic syndrome and arthrogryposis multiplex congenita.
Limitation of movement during fetal development may lead to multiple joint contractures in the neonate, termed arthrogryposis multiplex congenita. Neuromuscular disorders are among the many different causes of reduced fetal movement. Many congenital myasthenic syndromes (CMSs) are due to mutations o...
| Hlavní autoři: | , , , , , , , , |
|---|---|
| Médium: | Journal article |
| Jazyk: | English |
| Vydáno: |
2001
|
| _version_ | 1826306624337215488 |
|---|---|
| author | Brownlow, S Webster, R Croxen, R Brydson, M Neville, B Lin, J Vincent, A Newsom-Davis, J Beeson, D |
| author_facet | Brownlow, S Webster, R Croxen, R Brydson, M Neville, B Lin, J Vincent, A Newsom-Davis, J Beeson, D |
| author_sort | Brownlow, S |
| collection | OXFORD |
| description | Limitation of movement during fetal development may lead to multiple joint contractures in the neonate, termed arthrogryposis multiplex congenita. Neuromuscular disorders are among the many different causes of reduced fetal movement. Many congenital myasthenic syndromes (CMSs) are due to mutations of the adult-specific epsilon subunit of the acetylcholine receptor (AChR), and, thus, functional deficits do not arise until late in gestation. However, an earlier effect on the fetus might be predicted with some defects of other AChR subunits. We studied a child who presented at birth with joint contractures and was subsequently found to have a CMS. Mutational screening revealed heteroallelic mutation within the AChR delta subunit gene, delta 756ins2 and delta E59K. Expression studies demonstrate that delta 756ins2 is a null mutation. By contrast, both fetal and adult AChR containing delta E59K have shorter than normal channel activations that predict fast decay of endplate currents. Thus, delta E59K causes dysfunction of fetal as well as the adult AChR and would explain the presence of joint contractures on the basis of reduced fetal movement. This is the first report of the association of AChR gene mutations with arthrogryposis multiplex congenita. It is probable that mutations that severely disrupt function of fetal AChR will underlie additional cases. |
| first_indexed | 2024-03-07T06:50:47Z |
| format | Journal article |
| id | oxford-uuid:fc7d18a7-3b21-4e2c-ab34-06f22bc9263d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:50:47Z |
| publishDate | 2001 |
| record_format | dspace |
| spelling | oxford-uuid:fc7d18a7-3b21-4e2c-ab34-06f22bc9263d2022-03-27T13:21:09ZAcetylcholine receptor delta subunit mutations underlie a fast-channel myasthenic syndrome and arthrogryposis multiplex congenita.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fc7d18a7-3b21-4e2c-ab34-06f22bc9263dEnglishSymplectic Elements at Oxford2001Brownlow, SWebster, RCroxen, RBrydson, MNeville, BLin, JVincent, ANewsom-Davis, JBeeson, DLimitation of movement during fetal development may lead to multiple joint contractures in the neonate, termed arthrogryposis multiplex congenita. Neuromuscular disorders are among the many different causes of reduced fetal movement. Many congenital myasthenic syndromes (CMSs) are due to mutations of the adult-specific epsilon subunit of the acetylcholine receptor (AChR), and, thus, functional deficits do not arise until late in gestation. However, an earlier effect on the fetus might be predicted with some defects of other AChR subunits. We studied a child who presented at birth with joint contractures and was subsequently found to have a CMS. Mutational screening revealed heteroallelic mutation within the AChR delta subunit gene, delta 756ins2 and delta E59K. Expression studies demonstrate that delta 756ins2 is a null mutation. By contrast, both fetal and adult AChR containing delta E59K have shorter than normal channel activations that predict fast decay of endplate currents. Thus, delta E59K causes dysfunction of fetal as well as the adult AChR and would explain the presence of joint contractures on the basis of reduced fetal movement. This is the first report of the association of AChR gene mutations with arthrogryposis multiplex congenita. It is probable that mutations that severely disrupt function of fetal AChR will underlie additional cases. |
| spellingShingle | Brownlow, S Webster, R Croxen, R Brydson, M Neville, B Lin, J Vincent, A Newsom-Davis, J Beeson, D Acetylcholine receptor delta subunit mutations underlie a fast-channel myasthenic syndrome and arthrogryposis multiplex congenita. |
| title | Acetylcholine receptor delta subunit mutations underlie a fast-channel myasthenic syndrome and arthrogryposis multiplex congenita. |
| title_full | Acetylcholine receptor delta subunit mutations underlie a fast-channel myasthenic syndrome and arthrogryposis multiplex congenita. |
| title_fullStr | Acetylcholine receptor delta subunit mutations underlie a fast-channel myasthenic syndrome and arthrogryposis multiplex congenita. |
| title_full_unstemmed | Acetylcholine receptor delta subunit mutations underlie a fast-channel myasthenic syndrome and arthrogryposis multiplex congenita. |
| title_short | Acetylcholine receptor delta subunit mutations underlie a fast-channel myasthenic syndrome and arthrogryposis multiplex congenita. |
| title_sort | acetylcholine receptor delta subunit mutations underlie a fast channel myasthenic syndrome and arthrogryposis multiplex congenita |
| work_keys_str_mv | AT brownlows acetylcholinereceptordeltasubunitmutationsunderlieafastchannelmyasthenicsyndromeandarthrogryposismultiplexcongenita AT websterr acetylcholinereceptordeltasubunitmutationsunderlieafastchannelmyasthenicsyndromeandarthrogryposismultiplexcongenita AT croxenr acetylcholinereceptordeltasubunitmutationsunderlieafastchannelmyasthenicsyndromeandarthrogryposismultiplexcongenita AT brydsonm acetylcholinereceptordeltasubunitmutationsunderlieafastchannelmyasthenicsyndromeandarthrogryposismultiplexcongenita AT nevilleb acetylcholinereceptordeltasubunitmutationsunderlieafastchannelmyasthenicsyndromeandarthrogryposismultiplexcongenita AT linj acetylcholinereceptordeltasubunitmutationsunderlieafastchannelmyasthenicsyndromeandarthrogryposismultiplexcongenita AT vincenta acetylcholinereceptordeltasubunitmutationsunderlieafastchannelmyasthenicsyndromeandarthrogryposismultiplexcongenita AT newsomdavisj acetylcholinereceptordeltasubunitmutationsunderlieafastchannelmyasthenicsyndromeandarthrogryposismultiplexcongenita AT beesond acetylcholinereceptordeltasubunitmutationsunderlieafastchannelmyasthenicsyndromeandarthrogryposismultiplexcongenita |