Document Detail


Molecular basis of type I antithrombin deficiency in two women with recurrent venous thromboembolism in the first trimester of pregnancy.
MedLine Citation:
PMID:  22424603     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Inherited antithrombin (AT) deficiency carries a 50% risk of venous thromboembolism (VTE) during pregnancy. Here, we investigated the molecular basis of type I AT deficiency in two women with recurrent VTE in the first trimester of pregnancy. Phenotype analysis showed both probands had almost 50% of normal AT levels. Two novel heterozygous AT mutations were identified: g.7920C>T resulting in a Trp225Cys mutation in case 1 and g.13863C>A causing an Ala404Asp mutation in case 2. Transient expression of either wild-type (WT) or mutant AT expression vectors in HEK293T and CHO cells showed impaired secretion of both AT mutant proteins. Immunofluorescence analysis revealed that the staining of AT-Trp225Cys in both endoplasmic reticulum (ER) and Golgi apparatus was similar to that of AT-WT, and the staining of AT-Ala404Asp was mainly present in ER but was weaker than that of AT-WT. These results revealed that the type I AT deficiency in two patients was caused by impaired secretion of the AT-Trp225Cys and AT-Ala404Asp mutant proteins, respectively. The two mutations are associated with a high risk of thrombotic onset and women with these AT mutations are prone to VTE in early pregnancy.
Authors:
Yan Xia; Qiu-Ya Lu; Ye-Ling Lu; Jing Dai; Qiu-Lan Ding; Xue-Feng Wang; Xiao-Dong Xi; Hong-Li Wang
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-14
Journal Detail:
Title:  Blood cells, molecules & diseases     Volume:  -     ISSN:  1096-0961     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9509932     Medline TA:  Blood Cells Mol Dis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Inc. All rights reserved.
Affiliation:
State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China.
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