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A novel GLI3c.750delC truncation mutation in a multiplex Greig cephalopolysyndactyly syndrome family with an unusual phenotypic combination in a patient

Greig cephalopolysyndactyly (GCPS) syndrome is an autosomal dominant disorder with high penetrance in majority of cases, characterized by a triad of polysyndactyly, macrocephaly and hypertelorism. GCPS is known to be caused by mutations in the transcription factor GLI3 gene (7p13) which results in f...

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Autores principales: Patel, Rashmi, Tripathi, Fanish Mani, Singh, Subodh Kumar, Rani, Anjali, Bhattacharya, Visweswar, Ali, Akhtar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4297881/
https://www.ncbi.nlm.nih.gov/pubmed/25606469
http://dx.doi.org/10.1016/j.mgene.2014.11.002
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author Patel, Rashmi
Tripathi, Fanish Mani
Singh, Subodh Kumar
Rani, Anjali
Bhattacharya, Visweswar
Ali, Akhtar
author_facet Patel, Rashmi
Tripathi, Fanish Mani
Singh, Subodh Kumar
Rani, Anjali
Bhattacharya, Visweswar
Ali, Akhtar
author_sort Patel, Rashmi
collection PubMed
description Greig cephalopolysyndactyly (GCPS) syndrome is an autosomal dominant disorder with high penetrance in majority of cases, characterized by a triad of polysyndactyly, macrocephaly and hypertelorism. GCPS is known to be caused by mutations in the transcription factor GLI3 gene (7p13) which results in functional haploinsufficiency of this gene. The present study reports a large multiplex family having 12 members affected with GCPS in 3 generations and several unaffected members showing autosomal dominant pattern of inheritance with complete penetrance. Interestingly an affected member of the family had unusual features including thumb which is although biphalangeal (confirmed with X-ray) but morphologically looks like finger and a unilateral tiny bony outgrown (externally indistinguishable) on the distal phalanx of the first toe of the left foot. This member also presented with mild ichthyosis. Although it is also possible that one or more of these features are coincidentally present in this member and might not be part of GCPS. Resequencing of the GLI3 gene detected a novel frame-shift mutation c.750delC in heterozygous state transmitting in the family and co-segregating with the disorder suggesting it to be the causal for the GCPS phenotype in the family. In silico analysis suggests that this mutation creates a truncated GLI3 protein resulting in its haploinsufficiency leading to GCPS syndrome. Furthermore, genotype-phenotype correlation is supported by the mutation as it lies in the amino terminal domain of the protein.
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spelling pubmed-42978812015-01-20 A novel GLI3c.750delC truncation mutation in a multiplex Greig cephalopolysyndactyly syndrome family with an unusual phenotypic combination in a patient Patel, Rashmi Tripathi, Fanish Mani Singh, Subodh Kumar Rani, Anjali Bhattacharya, Visweswar Ali, Akhtar Meta Gene Article Greig cephalopolysyndactyly (GCPS) syndrome is an autosomal dominant disorder with high penetrance in majority of cases, characterized by a triad of polysyndactyly, macrocephaly and hypertelorism. GCPS is known to be caused by mutations in the transcription factor GLI3 gene (7p13) which results in functional haploinsufficiency of this gene. The present study reports a large multiplex family having 12 members affected with GCPS in 3 generations and several unaffected members showing autosomal dominant pattern of inheritance with complete penetrance. Interestingly an affected member of the family had unusual features including thumb which is although biphalangeal (confirmed with X-ray) but morphologically looks like finger and a unilateral tiny bony outgrown (externally indistinguishable) on the distal phalanx of the first toe of the left foot. This member also presented with mild ichthyosis. Although it is also possible that one or more of these features are coincidentally present in this member and might not be part of GCPS. Resequencing of the GLI3 gene detected a novel frame-shift mutation c.750delC in heterozygous state transmitting in the family and co-segregating with the disorder suggesting it to be the causal for the GCPS phenotype in the family. In silico analysis suggests that this mutation creates a truncated GLI3 protein resulting in its haploinsufficiency leading to GCPS syndrome. Furthermore, genotype-phenotype correlation is supported by the mutation as it lies in the amino terminal domain of the protein. Elsevier 2014-11-25 /pmc/articles/PMC4297881/ /pubmed/25606469 http://dx.doi.org/10.1016/j.mgene.2014.11.002 Text en © 2014 The Authors http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
spellingShingle Article
Patel, Rashmi
Tripathi, Fanish Mani
Singh, Subodh Kumar
Rani, Anjali
Bhattacharya, Visweswar
Ali, Akhtar
A novel GLI3c.750delC truncation mutation in a multiplex Greig cephalopolysyndactyly syndrome family with an unusual phenotypic combination in a patient
title A novel GLI3c.750delC truncation mutation in a multiplex Greig cephalopolysyndactyly syndrome family with an unusual phenotypic combination in a patient
title_full A novel GLI3c.750delC truncation mutation in a multiplex Greig cephalopolysyndactyly syndrome family with an unusual phenotypic combination in a patient
title_fullStr A novel GLI3c.750delC truncation mutation in a multiplex Greig cephalopolysyndactyly syndrome family with an unusual phenotypic combination in a patient
title_full_unstemmed A novel GLI3c.750delC truncation mutation in a multiplex Greig cephalopolysyndactyly syndrome family with an unusual phenotypic combination in a patient
title_short A novel GLI3c.750delC truncation mutation in a multiplex Greig cephalopolysyndactyly syndrome family with an unusual phenotypic combination in a patient
title_sort novel gli3c.750delc truncation mutation in a multiplex greig cephalopolysyndactyly syndrome family with an unusual phenotypic combination in a patient
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4297881/
https://www.ncbi.nlm.nih.gov/pubmed/25606469
http://dx.doi.org/10.1016/j.mgene.2014.11.002
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