A complex genomic abnormality found in a patient with antithrombin deficiency and autoimmune disease-like symptoms.
Int J Hematol
; 100(2): 200-5, 2014 Aug.
Article
in En
| MEDLINE
| ID: mdl-24889358
ABSTRACT
Hereditary antithrombin (AT) deficiency is an autosomal dominant thrombophilic disorder caused by SERPINC1 abnormality. In the present study, we analyzed SERPINC1 in a Japanese patient with AT deficiency and autoimmune disease-like symptoms. Direct sequencing and multiplex ligation-dependent probe amplification revealed that the patient was hemizygous for the entire SERPINC1 deletion. Single nucleotide polymorphism genotyping, gene dose measurement, and long-range polymerase chain reaction (PCR) followed by mapping PCR and direct sequencing of the long-range PCR products revealed that the patient had an approximately 111-kb gene deletion from exon 2 of ZBTB37 to intron 5 of RC3H1, including the entire SERPINC1 in chromosome 1. We also found a 7-bp insertion of an unknown origin in the breakpoint, which may be a combination of three parts with a few base-pair microhomologies, resulting from a replication-based process known as 'fork stalling and template switching'. Because RC3H1, which encodes the protein roquin is involved in the repression of self-immune responses, the autoimmune disease-like symptoms of the patient may have resulted from this gene defect. In conclusion, we identified an entire SERPINC1 deletion together with a large deletion of RC3H1 in an AT-deficient patient with autoimmune disease-like symptoms.
Full text:
1
Database:
MEDLINE
Main subject:
Autoimmune Diseases
/
Base Sequence
/
Antithrombin III
/
RNA-Binding Proteins
/
Sequence Deletion
/
Antithrombin III Deficiency
/
Ubiquitin-Protein Ligases
Type of study:
Diagnostic_studies
/
Prognostic_studies
Limits:
Adult
/
Female
/
Humans
Language:
En
Year:
2014
Type:
Article