Identification of three F5 gene mutations associated with inherited coagulation factor V deficiency in two Chinese pedigrees
Q.-H. Fu
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Blood Centre of Zhejiang Province, Hangzhou, Zhejiang
Qi-Hua Fu and Rong-Fu Zhou contribute equally to this work and should be considered as co-first author.
Search for more papers by this authorR.-F. Zhou
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Qi-Hua Fu and Rong-Fu Zhou contribute equally to this work and should be considered as co-first author.
Search for more papers by this authorL.-G. Liu
Department of Hematology, Shanghai Fifth People's Hospital affiliated to Fudan University, Shanghai, China
Search for more papers by this authorW.-B. Wang
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorW.-M. Wu
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorQ.-L. Ding
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorY.-Q. Hu
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorX.-F. Wang
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorZ.-Y. Wang
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorH.-L. Wang
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorQ.-H. Fu
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Blood Centre of Zhejiang Province, Hangzhou, Zhejiang
Qi-Hua Fu and Rong-Fu Zhou contribute equally to this work and should be considered as co-first author.
Search for more papers by this authorR.-F. Zhou
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Qi-Hua Fu and Rong-Fu Zhou contribute equally to this work and should be considered as co-first author.
Search for more papers by this authorL.-G. Liu
Department of Hematology, Shanghai Fifth People's Hospital affiliated to Fudan University, Shanghai, China
Search for more papers by this authorW.-B. Wang
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorW.-M. Wu
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorQ.-L. Ding
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorY.-Q. Hu
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorX.-F. Wang
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorZ.-Y. Wang
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorH.-L. Wang
Division of Thrombosis and Hemostasis, Shanghai Institute of Hematology, Ruijin Hospital, Shanghai Second Medical University, Shanghai
Search for more papers by this authorAbstract
Summary. To investigate the molecular defects in two Chinese pedigrees with inherited factor V (FV) deficiency.
A 37-year-old male (proband 1) and an 18-month-old boy (proband 2) were diagnosed as inherited coagulation FV deficiency by severely reduced plasma levels of FV activity and antigen. All 25 exons and their flanking sequence of F5 gene were amplified by polymerase chain reaction (PCR) for both probands and the PCR products were directly sequenced. Total RNA was extracted from the peripheral lymphocytes of proband 1 for detecting the changes at mRNA level.
The homozygous deletion IVS8 −2A>G was identified in the F5 gene of proband 1 and complementary DNA (cDNA) analysis revealed the abolishment of the canonical splicing site by the mutation and the activation of the cryptic acceptor site 24 bp upstream instead. The insertion introduced eight additional amino acids (AA) into the FV protein. Two heterozygous mutations of F5 gene were discovered in proband 2. The 2238-9del AG in exon 13 introduced a premature termination code at 689 AA and the substitution of G6410 by T in exon 23 lead to the missense mutation Gly2079Val.
Three F5 gene mutations, IVS8 −2A>G, 2238-9del AG and G6410T, have been identified in two Chinese pedigree with congenital FV deficiency, respectively.
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