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Osaki K, Sogabe Y, Seki R, Nakamura T, Morishige S, Oku E, Takata Y, Mouri F, Yoshimoto K, Nagafuji K, Okamura T. Factor VII Deficiency Due to Compound Heterozygosity for the p.Leu13Pro Mutation and a Novel Mutation in the HNF4 Binding Region (-58G>C) in the F7 Promoter. Kurume Med J 2022; 67:83-89. [PMID: 36123027 DOI: 10.2739/kurumemedj.ms6723006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We investigated the molecular basis of factor VII (FVII) deficiency in a Japanese patient and identified compound heterozygous mutations. Factor VII activity and antigen levels in the patient were less than 5.0% and 6.5% of controls, respectively. All exons, exon-intron boundaries, and the 5' promoter region of F7 from genomic DNA were amplified using polymerase chain reaction (PCR). Sequencing analysis of PCR fragments revealed that the patient was heterozygous for a known T to C substitution at nucleotide position 38, which resulted in the p.Leu13Pro missense mutation (Factor VII Morioka) in the signal peptide region, and a novel mutation in the 5' promoter region (-58G>C). An electrophoretic mobility shift assay showed that the mutation in the promoter region reduced the binding of hepatocyte nuclear factor (HNF). It is presumed that the reduced binding of HNF-4 to the F7 promoter region reduces F7 transcription and thus reduces the synthesis and expression of FVII.
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Affiliation(s)
- Koichi Osaki
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
| | - Yoko Sogabe
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
- Graduate School of Engineering, Hokkai-Gakuen University
| | - Ritsuko Seki
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
| | - Takayuki Nakamura
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
| | - Satoshi Morishige
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
| | - Eijiro Oku
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
| | - Yuka Takata
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
| | - Fumihiko Mouri
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
| | - Koji Yoshimoto
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
| | - Koji Nagafuji
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
| | - Takashi Okamura
- Division of Hematology and Oncology, Department of Medicine, Kurume University School of Medicine
- Hematology and Oncology Center, St. Mary's Hospital
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Hu YN, Gan YM, Zhang YP, Ruan DD, Zhu YB, Lin XF, Fang ZT, Liao LS, Tang FQ, Luo JW. A novel compound heterozygous variant linked to hematuria in a family with hereditary factor VII deficiency. J Gene Med 2021; 24:e3398. [PMID: 34786791 DOI: 10.1002/jgm.3398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 09/06/2021] [Accepted: 09/28/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Hereditary Factor VII Deficiency (FVIID) is a rare congenital autosomal recessive bleeding disorder. In clinical manifestations, its onset is caused by variant of the F7 gene (NM_019616) with strong heterogeneity. We identified a family with hematuria caused by a novel F7 compound heterozygous variant and studied the FVIID-dependent mechanism impacted by these variants. METHODS Coagulation factors in the proband were functionally verified. We located pathogenic variants in relevant genes using next-generation sequencing after target enrichment and verified them by Sanger sequencing. We examined the coagulation activity and secretion pattern of recombinant FVII variants expressed in cells and observed their location and stability by immunofluorescence. RESULTS We found a missense variant c.1207G>A (p.Gly403Ser) and a frameshift variant c.154_155del (p.Arg53fs) in the F7 gene of the proband. FVII activity tests showed that the variants significantly decreased its presence in the cell culture supernatant. Moreover, the R53fs mutant lacked the FVII functional domain and had no detectable activity. Immunofluorescence indicated that the p.Gly403Ser variant was distributed to the cell membrane and cytoplasm, while the FVII R53fs variant was not detected. Deficient FVII protein function and severe coagulation disorder are the likely causes of hematuria and other bleeding symptoms in the proband. CONCLUSION The newly discovered F7 gene variants enrich the spectrum of hereditary FVII deficiency and provide a new foundation for the diagnosis and treatment of this type of coagulation disorder.
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Affiliation(s)
- Ya-Nan Hu
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.,Fujian provincial hospital, Fuzhou, China
| | - Yu-Mian Gan
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.,Fujian provincial hospital, Fuzhou, China
| | - Yan-Ping Zhang
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.,Fujian provincial hospital, Fuzhou, China
| | - Dan-Dan Ruan
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.,Fujian provincial hospital, Fuzhou, China
| | - Yao-Bin Zhu
- Department of Traditional Chinese Medicine, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Xin-Fu Lin
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.,Fujian provincial hospital, Fuzhou, China
| | - Zhu-Ting Fang
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.,Fujian provincial hospital, Fuzhou, China
| | - Li-Sheng Liao
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.,Fujian provincial hospital, Fuzhou, China
| | - Fa-Qiang Tang
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.,Fujian provincial hospital, Fuzhou, China
| | - Jie-Wei Luo
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, China.,Fujian provincial hospital, Fuzhou, China
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Chollet ME, Andersen E, Skarpen E, Myklebust CF, Koehler C, Morth JP, Chuansumrit A, Pinotti M, Bernardi F, Thiede B, Sandset PM, Skretting G. Factor VII deficiency: Unveiling the cellular and molecular mechanisms underlying three model alterations of the enzyme catalytic domain. Biochim Biophys Acta Mol Basis Dis 2018; 1864:660-667. [DOI: 10.1016/j.bbadis.2017.12.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/24/2017] [Accepted: 12/11/2017] [Indexed: 12/19/2022]
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