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Compound heterozygosity for novel von Willebrand factor genetic variants associated with von Willebrand disease in two Chinese patients. Blood Coagul Fibrinolysis 2023; 34:33-39. [PMID: 36598376 DOI: 10.1097/mbc.0000000000001174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Von Willebrand factor (VWF) encodes a secreted glycoprotein involved in primary hemostasis. Genetic mutations in this gene leading to either quantitation or qualitative defects of VWF, result in von Willebrand disease (VWD), an inherited bleeding disorder. METHODS In this study, two families with VWD were recruited and submitted to a series of clinical and genetic examinations. prothrombin time, activated partial thromboplastin time, thrombin time, factor VIII coagulant activity (FVIII:C), VWF antigen (VWF:Ag), VWF ristocetin cofactor (VWF:RCo) tests were measured in peripheral blood. F8, F9, and VWF genes were sequenced using next-generation sequencing, and Sanger sequencing was used as a validation method. RESULTS Both families had a child suffered spontaneous bleeding. Patient 1 showed normal VWF:Ag, severely decreased FVIII:C and VWF:RCo. Patient 2 showed severely decreased FVIII:C, VWF:Ag, and VWF:RCo. Compound heterozygous mutations of VWF gene were identified in both patients. Patient 1 had a novel deletion variant c.1910_1932del (p.Gly637AlafsTer5) and a missense variant c.605G>A (p.Arg202Gln). Patient 2 had a novel missense variant c.4817T>A (p.Met1606Lys) and a novel missense variant c.5983C>T (p.Pro1995Ser). CONCLUSIONS We described clinical and molecular features of VWD caused by compound heterozygous mutations in two Chinese patients. Our results expand the variation spectrum of the VWF gene and deepen the understanding of the relationship between the genotype and clinical characteristics of VWD.
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Swinkels M, Atiq F, Bürgisser PE, Moort I, Meijer K, Eikenboom J, Fijnvandraat K, Galen KPM, Meris J, Schols SEM, Bom JG, Cnossen MH, Voorberg J, Leebeek FWG, Bierings R, Jansen AJG, Fijnvandraat K, Coppens M, Meris J, Nieuwenhuizen L, Meijer K, Tamminga RYJ, Ypma PF, Eikenboom HCJ, Bom JG, Smiers FJW, Granzen B, Moenen F, Brons P, Schols SEM, Leebeek FWG, Cnossen MH, Atiq F, Kwawegen CB, Galen KPM. Platelet degranulation and bleeding phenotype in a large cohort of Von Willebrand disease patients. Br J Haematol 2022; 197:497-501. [PMID: 36165954 PMCID: PMC9314899 DOI: 10.1111/bjh.18145] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/24/2022] [Accepted: 03/02/2022] [Indexed: 11/30/2022]
Abstract
Von Willebrand disease (VWD) is a bleeding disorder caused by quantitative (type 1 or 3) or qualitative (type 2A/2B/2M/2N) defects of circulating von Willebrand factor (VWF). Circulating VWF levels not always fully explain bleeding phenotypes, suggesting a role for alternative factors, like platelets. Here, we investigated platelet factor 4 (PF4) in a large cohort of patients with VWD. PF4 levels were lower in type 2B and current bleeding phenotype was significantly associated with higher PF4 levels, particularly in type 1 VWD. Based on our findings we speculate that platelet degranulation and cargo release may play a role across VWD subtypes.
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Affiliation(s)
- Maurice Swinkels
- Department of Hematology Erasmus University Medical Center Rotterdam The Netherlands
| | - Ferdows Atiq
- Department of Hematology Erasmus University Medical Center Rotterdam The Netherlands
| | - Petra E. Bürgisser
- Department of Hematology Erasmus University Medical Center Rotterdam The Netherlands
| | - Iris Moort
- Department of Hematology Erasmus University Medical Center Rotterdam The Netherlands
| | - Karina Meijer
- Department of Hematology, University Medical Center Groningen University of Groningen Groningen The Netherlands
| | - Jeroen Eikenboom
- Department of Internal Medicine, Division of Thrombosis and Hemostasis Leiden University Medical Center Leiden The Netherlands
- Einthoven Laboratory for Vascular and Regenerative Medicine Leiden University Medical Center Leiden The Netherlands
| | - Karin Fijnvandraat
- Department of Pediatric Hematology Emma Children's Hospital‐Academic Medical Centre Amsterdam The Netherlands
| | - Karin P. M. Galen
- Van Creveldkliniek, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
| | - Joke Meris
- Netherlands Hemophilia Society Leiden The Netherlands
| | - Saskia E. M. Schols
- Department of Hematology Radboud University Medical Center and Hemophilia Treatment Center Nijmegen‐Eindhoven‐Maastricht Nijmegen The Netherlands
| | - Johanna G. Bom
- Department of Clinical Epidemiology Leiden University Medical Center Leiden The Netherlands
| | - Marjon H. Cnossen
- Department of Pediatric Hematology Erasmus University Medical Center‐Sophia Children's Hospital Rotterdam The Netherlands
| | - Jan Voorberg
- Department of Molecular Hematology, Sanquin Research and Landsteiner Laboratory, Amsterdam University Medical Center University of Amsterdam Amsterdam The Netherlands
- Department of Experimental Vascular Medicine, Amsterdam University Medical Center University of Amsterdam Amsterdam The Netherlands
| | - Frank W. G. Leebeek
- Department of Hematology Erasmus University Medical Center Rotterdam The Netherlands
| | - Ruben Bierings
- Department of Hematology Erasmus University Medical Center Rotterdam The Netherlands
| | - A. J. Gerard Jansen
- Department of Hematology Erasmus University Medical Center Rotterdam The Netherlands
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Wu F, Zhang H, Zhou J, Wu J, Tong D, Chen X, Huang Y, Shi H, Yang Y, Ma G, Yao C, Du A. The trypsin inhibitor-like domain is required for a serine protease inhibitor of Haemonchus contortus to inhibit host coagulation. Int J Parasitol 2021; 51:1015-1026. [PMID: 34126100 DOI: 10.1016/j.ijpara.2021.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/29/2021] [Accepted: 05/10/2021] [Indexed: 02/05/2023]
Abstract
Haemonchus contortus, a blood-feeding nematode, inhibits blood coagulation at the site of infection to facilitate blood-sucking and digesting for successful parasitism. However, the mechanism underlying anti-coagulation at the host-parasite interface is largely unknown. In the current study, Hc-spi-i8, which has two greatly different transcripts named Hc-spi-i8a and Hc-spi-i8b, respectively, was described. Hc-SPI-I8A was a serine protease inhibitor containing a trypsin inhibitor-like cysteine rich (TIL) domain, while Hc-SPI-I8B was not. Hc-SPI-I8A/B were primarily expressed in the hypodermis, intestines and gonads in the parasitic stages of H. contortus. Hc-SPI-I8A interacted with Ovis aries TSP1-containing protein (OaTSP1CP), which was determined by yeast two-hybrid, co-immunoprecipitation (Co-IP), pull down and co-localization experiments. The blood clotting time contributed by the TIL domain was prolonged by Hc-SPI-I8A. Hc-SPI-I8A is most likely interfering in the extrinsic coagulation cascade by interacting with OaTSP1CP through its TIL domain and intrinsic coagulation cascade by an unknown mechanism. These findings depict a crucial point in the host-parasite interaction during H. contortus colonization, which should contribute to drug discovery and vaccine development in fighting against this important parasite worldwide.
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Affiliation(s)
- Fei Wu
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Hui Zhang
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jingru Zhou
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jie Wu
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Danni Tong
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xueqiu Chen
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yan Huang
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Hengzhi Shi
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yi Yang
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Guangxu Ma
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Chaoqun Yao
- Ross University School of Veterinary Medicine and One Health Center for Zoonoses and Tropical Veterinary Medicine, Ross University School of Veterinary Medicine, P.O. Box 334, Basseterre, St. Kitts, Trinidad and Tobago
| | - Aifang Du
- Institute of Preventive Veterinary Medicine, Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.
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