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Plos One : a Novel Homozygous P.R1105X Mutation of the Ap4E1 Gene in Twins with Hereditary Spastic Paraplegia and Mycobacterial Disease, Volume 8

By Nogales-gadea, Gisela

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Book Id: WPLBN0003942900
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Reproduction Date: 2015

Title: Plos One : a Novel Homozygous P.R1105X Mutation of the Ap4E1 Gene in Twins with Hereditary Spastic Paraplegia and Mycobacterial Disease, Volume 8  
Author: Nogales-gadea, Gisela
Volume: Volume 8
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection
Historic
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Publisher: Plos

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Nogales-Gadea, G. (n.d.). Plos One : a Novel Homozygous P.R1105X Mutation of the Ap4E1 Gene in Twins with Hereditary Spastic Paraplegia and Mycobacterial Disease, Volume 8. Retrieved from http://netlibrary.net/


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Description : We report identical twins with intellectual disability, progressive spastic paraplegia and short stature, born to a consanguineous family. Intriguingly, both children presented with lymphadenitis caused by the live Bacillus Calmette- Gue´rin (BCG) vaccine. Two syndromes – hereditary spastic paraplegia (HSP) and mycobacterial disease – thus occurred simultaneously. Whole-exome sequencing (WES) revealed a homozygous nonsense mutation (p.R1105X) of the AP4E1 gene, which was confirmed by Sanger sequencing. The p.R1105X mutation has no effect on AP4E1 mRNA levels, but results in lower levels of AP-4e protein and of the other components of the AP-4 complex, as shown by western blotting, immunoprecipitation and immunofluorescence. Thus, the C-terminal part of the AP-4e subunit plays an important role in maintaining the integrity of the AP-4 complex. No abnormalities of the IL-12/IFN-c axis or oxidative burst pathways were identified. In conclusion, we identified twins with autosomal recessive AP-4 deficiency associated with HSP and mycobacterial disease, suggesting that AP-4 may play important role in the neurological and immunological systems.

 

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