TCIRG1-associated congenital neutropenia
Vahagn Makaryan1, Elisabeth A Rosenthal, Audrey Anna Bolyard
1Department of Medicine, Divisions of GIM, University of Washington, Seattle, Washington.
Human Mutation
|April 23, 2014
Summary
Severe congenital neutropenia (SCN) is a rare blood disorder. Genetic analysis identified a novel TCIRG1 gene variant in a family with SCN, suggesting this gene
Area of Science:
- Genetics
- Hematology
- Molecular Biology
Background:
- Severe congenital neutropenia (SCN) is a rare blood disorder affecting neutrophil production.
- The genetic basis for over 30% of SCN cases remains unknown.
- Autosomal dominant inheritance patterns are observed in many SCN families.
Purpose of the Study:
- To identify the genetic cause of SCN in a multi-generation family.
- To investigate the role of the TCIRG1 gene in SCN pathogenesis.
- To explore novel genetic variants associated with SCN.
Main Methods:
- Segregation analysis of a novel single nucleotide variant (SNV) in the TCIRG1 gene within a five-generation family.
- Western blot analysis to assess TCIRG1 protein levels in affected and unaffected individuals.
- Screening of TCIRG1 in unrelated SCN patients for additional rare variants.
Main Results:
- A novel SNV in the TCIRG1 gene perfectly cosegregated with SCN in the studied family.
- Affected individuals exhibited reduced TCIRG1 protein levels.
- Two unrelated SCN patients carried different rare, conserved coding variants in TCIRG1.
Conclusions:
- The TCIRG1 gene is implicated in the pathogenesis of severe congenital neutropenia.
- Novel variants in TCIRG1 represent a potential genetic cause for SCN.
- Further research into TCIRG1 is warranted for understanding and diagnosing SCN.
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