Bain type of X-linked syndromic mental retardation in a male with a pathogenic variant in HNRNPH2

Puneeth H. Somashekar, Dhanya L. Narayanan, Sujatha Jagadeesh, Beena Suresh, Reddy D. Vaishnavi, Stephanie Bielas, Katta M. Girisha, Anju Shukla

Research output: Contribution to journalArticle

Abstract

Heterogeneous nuclear ribonucleoproteins (hnRNPs) are RNA binding proteins, which aid in maturation, stabilization, and transport of mRNA. They have a significant role in cellular nucleic acid metabolism. The hnRNPs alter gene expression and are linked to various neurodegenerative disorders and cancers. Previously, six unrelated girls with developmental delay, intellectual disability, and hypotonia were found to have de novo heterozygous pathogenic missense variants in HNRNPH2, located on the X chromosome. A gain-of-function effect was proposed for the variant and it was thought to be lethal in males as no surviving males were identified. We describe a family with two affected siblings, one male and one female, with a known pathogenic variant in HNRNPH2, possibly due to maternal germline mosaicism.

Original languageEnglish
JournalAmerican Journal of Medical Genetics, Part A
DOIs
Publication statusAccepted/In press - 01-01-2019

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X-Linked Mental Retardation
Heterogeneous-Nuclear Ribonucleoproteins
Heterogeneous Nuclear RNA
Muscle Hypotonia
Mosaicism
RNA-Binding Proteins
X Chromosome
Intellectual Disability
Neurodegenerative Diseases
Nucleic Acids
Siblings
Mothers
Gene Expression
Messenger RNA
Neoplasms

All Science Journal Classification (ASJC) codes

  • Genetics
  • Genetics(clinical)

Cite this

Somashekar, Puneeth H. ; Narayanan, Dhanya L. ; Jagadeesh, Sujatha ; Suresh, Beena ; Vaishnavi, Reddy D. ; Bielas, Stephanie ; Girisha, Katta M. ; Shukla, Anju. / Bain type of X-linked syndromic mental retardation in a male with a pathogenic variant in HNRNPH2. In: American Journal of Medical Genetics, Part A. 2019.
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Bain type of X-linked syndromic mental retardation in a male with a pathogenic variant in HNRNPH2. / Somashekar, Puneeth H.; Narayanan, Dhanya L.; Jagadeesh, Sujatha; Suresh, Beena; Vaishnavi, Reddy D.; Bielas, Stephanie; Girisha, Katta M.; Shukla, Anju.

In: American Journal of Medical Genetics, Part A, 01.01.2019.

Research output: Contribution to journalArticle

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AU - Somashekar, Puneeth H.

AU - Narayanan, Dhanya L.

AU - Jagadeesh, Sujatha

AU - Suresh, Beena

AU - Vaishnavi, Reddy D.

AU - Bielas, Stephanie

AU - Girisha, Katta M.

AU - Shukla, Anju

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AB - Heterogeneous nuclear ribonucleoproteins (hnRNPs) are RNA binding proteins, which aid in maturation, stabilization, and transport of mRNA. They have a significant role in cellular nucleic acid metabolism. The hnRNPs alter gene expression and are linked to various neurodegenerative disorders and cancers. Previously, six unrelated girls with developmental delay, intellectual disability, and hypotonia were found to have de novo heterozygous pathogenic missense variants in HNRNPH2, located on the X chromosome. A gain-of-function effect was proposed for the variant and it was thought to be lethal in males as no surviving males were identified. We describe a family with two affected siblings, one male and one female, with a known pathogenic variant in HNRNPH2, possibly due to maternal germline mosaicism.

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