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Yuan JJ, Yin J, Ling J, Shen F, Xie LQ, Bai X, Ruan CG, He Y, Ma ZN. [Preparation and Application of Monoclonal Antibody Against Human von Willebrand Factor Propeptide]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2023; 31:1205-1210. [PMID: 37551499 DOI: 10.19746/j.cnki.issn.1009-2137.2023.04.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
OBJECTIVE To develop monoclonal antibodies that can specifically recognize human von Willebrand factor (VWF) propeptide (VWFpp) in plasma, and establish a rapid and reliable method for the detection of VWFpp antigen in plasma by using the double-antibody sandwich ELISA with the obtained anti-VWFpp monoclonal antibody. METHODS The recombinant human VWFpp (D1 and D2 regions) protein expressed in eukaryotic cells was used as immunogen to immunize BALB/c mice with routine method, so as to obtain clones of fusion cells. After screening and identification, hybridoma cell lines secreting monoclonal antibodies against VWFpp were selected, and then double-antibody sandwich ELISA assay was used to construct VWFpp antigen detection kit for the determination of VWFpp in human plasma. The levels of VWFpp antigen in plasma of 12 leukemia patients who underwent bone marrow transplantation were dynamically detected. RESULTS Two hybridoma cell lines that can be subcultured continuously and secrete monoclonal antibodies against VWFpp were obtained and named SZ175 and SZ176 respectively. Identified by ELISA and Western blot, the antibodies could both specifically recognize VWFpp but couldn't recognize mature VWF (without propeptide). Based on the principle of double-antibody sandwich ELISA, monoclonal antibodies SZ175 and SZ176 were successfully made into a kit for detecting VWFpp antigen. The plasma VWFpp levels of leukemia patients before and after bone marrow transplantation were dynamically detected. The results showed that the plasma VWFpp levels of the patients after transplantation were significantly higher than those before transplantation. CONCLUSION Two monoclonal antibodies against VWFpp were successfully prepared, and a double-antibody sandwich ELISA detection kit for VWFpp antigen was constructed, which provides a powerful tool for further study on the biological function of VWFpp, the clinical diagnosis and classification of von Willebrand disease (VWD), and the prognostic monitoring of endothelial injury-related diseases.
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Affiliation(s)
- Jiao-Jiao Yuan
- Jiangsu Institute of Hematology, National Clinical Research Center for Hematologic Diseases, NHC Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University,Suzhou, 215000, Jiangsu Province, China
| | - Jie Yin
- Jiangsu Institute of Hematology, National Clinical Research Center for Hematologic Diseases, NHC Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University,Suzhou, 215000, Jiangsu Province, China
| | - Jing Ling
- Department of Hematology and Oncology, Children's Hospital of Soochow University, Suzhou 215000, Jiangsu Province, China
| | - Fei Shen
- Jiangsu Institute of Hematology, National Clinical Research Center for Hematologic Diseases, NHC Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University,Suzhou, 215000, Jiangsu Province, China
| | - Li-Qian Xie
- Jiangsu Institute of Hematology, National Clinical Research Center for Hematologic Diseases, NHC Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University,Suzhou, 215000, Jiangsu Province, China
| | - Xia Bai
- Jiangsu Institute of Hematology, National Clinical Research Center for Hematologic Diseases, NHC Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University,Suzhou, 215000, Jiangsu Province, China
| | - Chang-Geng Ruan
- Jiangsu Institute of Hematology, National Clinical Research Center for Hematologic Diseases, NHC Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University,Suzhou, 215000, Jiangsu Province, China
| | - Yang He
- Jiangsu Institute of Hematology, National Clinical Research Center for Hematologic Diseases, NHC Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University,Suzhou, 215000, Jiangsu Province, China.Ministry of Education Engineering Center of Hematological Disease, Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Zhen-Ni Ma
- Jiangsu Institute of Hematology, National Clinical Research Center for Hematologic Diseases, NHC Key Laboratory of Thrombosis and Hemostasis, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University,Suzhou, 215000, Jiangsu Province, China.E-mail:
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Yu XQ, Ma ZN, Ling J, Zhao YX, Yin J, Yu ZQ, Ruan CG. [The Effect of VWF Propeptide on VWF Mutant in D1 Domain]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2022; 30:1541-1548. [PMID: 36208263 DOI: 10.19746/j.cnki.issn.1009-2137.2022.05.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
OBJECTIVE To investigate whether co-transfection of wild-type VWFpp with VWF mutant in D1 region is able to correct VWF defects in biosynthesis and secretion. METHODS Four VWF mutant plasmids were single transfected into HEK 293 cells, or co-transfected into HEK 293 cells with the wild type VWFpp plasmids. The VWF in supernatant and lysate of transfected cells were analyzed by ELISA, vertical VWF multimer electrophoresis. The retention of VWF in endoplasmic reticulum of transfected cells were detected by immunofluorescence confocal microscope. RESULTS In the vertical VWF multimer analysis, with co-expressing VWF mutant and VWFpp, the VWF multimer bands disappeared, and the VWF antigen in both supernatant and lysate of cells decreased, compared with the single expression of VWF mutant. Although the intracellular levels of VWF antigens decreased after co-expression, the retention rate of VWF mutant decreased in endoplasmic reticulum. CONCLUSION VWFpp can reduce the retention of VWF in endoplasmic reticulum, assists the transport of VWF between subcellular organelles. However, VWFpp inhibits the biosynthesis and secretion of VWF about the mutant in D1 domain.
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Affiliation(s)
- Xiu-Qun Yu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou 215000, Jiangsu Province, China
| | - Zhen-Ni Ma
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou 215000, Jiangsu Province, China
| | - Jing Ling
- Children's Hospital of Soochow University, Department of Hematology and Oncology, Suzhou 215000, Jiangsu Province, China
| | - Yun-Xiao Zhao
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou 215000, Jiangsu Province, China
| | - Jie Yin
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou 215000, Jiangsu Province, China
| | - Zi-Qiang Yu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou 215000, Jiangsu Province, China
| | - Chang-Geng Ruan
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou 215000, Jiangsu Province, China.E-mail:
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Yang F, Jiang M, Lin ZH, Xie ZL, Ma ZN, Yang L, Liu H, Wang ZY, Zhou L. [Effects of the ITGA2B Nonsense Mutation (c.2659C > T, p.Q887X) on Platelet Function in a Mouse Model of Glanzmann's Thrombasthenia Generated with CRISPR/Cas9 Technology]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2022; 30:559-564. [PMID: 35395997 DOI: 10.19746/j.cnki.issn.1009-2137.2022.02.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To construct a mouse model of Glanzmann's thrombasthenia (GT) with ITGA2B c.2659 C>T (p.Q887X) nonsense mutation by CRISPR/Cas9 technology, and then further explore the expression and function of glycoprotein αIIbβ3 on the surface of platelet membrane. METHODS The donor oligonucleotide and gRNA vector were designed and synthesized according to the ITGA2B gene sequence. The gRNA and Cas9 mRNA were injected into fertilized eggs with donor oligonucleotide and then sent back to the oviduct of surrogate mouse. Positive F0 mice were confirmed by PCR genotyping and sequence analysis after birth. The F1 generation of heterozygous GT mice were obtained by PCR and sequencing from F0 bred with WT mice, and then homozygous GT mice and WT mice were obtained by mating with each other. The phenotype of the model was then further verified by detecting tail hemorrhage time, saphenous vein bleeding time, platelet aggregation, expression and function of αIIbβ3 on the surface of platelet. RESULTS The bleeding time of GT mice was significantly longer than that of WT mice (P<0.01). Induced by collagen, thrombin, and adenosine diphosphate (ADP), platelet aggregation in GT mice was significantly inhibited (P<0.01, P<0.01, P<0.05). Flow cytometry analysis showed that the expression of αIIbβ3 on the platelet surface of GT mice decreased significantly compared with WT mice (P<0.01), and binding amounts of activated platelets to fibrinogen were significantly reduced after thrombin stimulation (P<0.01). The spreading area of platelet on fibrinogen in GT mice was significantly smaller than that in WT mice (P<0.05). CONCLUSION A GT mouse model with ITGA2B c.2659 C>T (p.Q887X) nonsense mutation has been established successfully by CRISPR/Cas9 technology. The aggregation function of platelet in this model is defective, which is consistent with GT performance.
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Affiliation(s)
- Fei Yang
- Department of Hematology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu Province, China;Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Miao Jiang
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Zeng-Hua Lin
- Department of Hematology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Zhan-Li Xie
- Institute of Clinical Medicine Research, Suzhou Science and Technology Town Hospital Affiliated to Nanjing Medical University , Suzhou 215001, Jiangsu Province, China
| | - Zhen-Ni Ma
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Li Yang
- Department of Hematology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Hong Liu
- Department of Hematology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Zhao-Yue Wang
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China,E-mail:
| | - Lu Zhou
- Department of Hematology, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu Province, China,E-mail:
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Hou MJ, Yu ZQ, Ma ZN, Zhang W, Bai X, Cao LJ, Su J, Sha PP, Wang ZY, Ruan CG. [Clinical observation of desmopressin in the treatment of 15 patients with DDAVP]. Zhonghua Xue Ye Xue Za Zhi 2019; 40:312-316. [PMID: 31104443 PMCID: PMC7343009 DOI: 10.3760/cma.j.issn.0253-2727.2019.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To assess the significance of DDAVP use in the diagnosis and treatment of VWD. Methods: An analysis of 15 VWD cases who referred to Hematology Division of First affiliated Hospital of Soochow University and treated with DDAVP from March 2016 to August 2018 was conducted. Efficacy and treatment response of DDAVP were monitored by observations of changes in factor Ⅷ procoagulant (FⅧ∶C) and von Willebrand Factor (VWF) related indicators before and 2 h after DDAVP injection. Results: Of 15 cases with VWD, 7 males and 8 females with a median age of 23 (6-46) years, 7 of 9 type I VWD patients achieved complete response (CR) , 1 type 2A VWD case CR, 5 type 3 VWD ones no response (NR) . The VWF multimer analysis in 5 patients combined with other plasma VWF values were in accordance with the known diagnosis. Conclusions: DDAVP was effective in most type 1 patients, and ineffective in some type 2 and almost all type 3 cases. It was helpful for diagnosis and subsequent treatment planning.
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Affiliation(s)
- M J Hou
- Department of Hematology, First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology; Key Laboratory of Thrombosis and Hemostasis of Ministry of Health; Collaborative Innovation Center of Hematology, Soochow university, Suzhou 215006, China
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Ling J, Ma ZN, Yin J, Shen F, Xie LQ, Zhao YX, Ruan CG. [Development of Hybridoma Cell Lines Secreting Monoclonal Antibodies against ADAMTS13]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2017; 25:1123-1129. [PMID: 28823280 DOI: 10.7534/j.issn.1009-2137.2017.04.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To establish the hybridoma cell lines secreting anti-ADAMTS13-T7 monoclonal antibodies (MA6) and to construct the MAb directed against different domains of ADAMTS13-T7. METHODS The trucated type protein ADAMTS13 of eukaryote-expressed recombinant ADAMTS13-T7 was constructed and was purified by using Ni-NTA agarose. Then the purified ADAMTS13 was used to immunize the BALB/c mice; the antiserum titer of ADAMTS13 protein of immunized mice was deteceted by ELISA. The spleen was taken from mice for construcing the single cell suspension, then the single cell suspension was mixed with myeloma cells SP2/0 at 10:1 ratio for cell fusion, and the elution culture of hybridoma cells was carried out; after 2 weeks, the wells in which clones were well grown were selected for detection, then the positive clonal wells were expansively cultured and the detection again was performed. RESULTS The purified ADAMTS13-T7 protein was gained. The ELISA showed that the antiserum titer in mice immumized by ADAMTS13-T7 protein was 1:20000. The results of fusion culture by hybridoma techmique showed that 30 hyridoma cell lines secreting MAb against recombinant ADAMTS13 were established. CONCLUSION The hybridoma cell lines secreting MAb against recombinant ADAMTS13 have been successfully established by fusion culture, which provide more powerful tools for further screening the MAb with certain functional activity and studying the structure and function of ADAMTS13.
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Affiliation(s)
- Jing Ling
- Department of Hematology, Children's Hospital of Soochow University, Suzhou 215003, Jiangsu Province, China
| | - Zhen-Ni Ma
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Jie Yin
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Fei Shen
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Li-Qian Xie
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Yun-Xiao Zhao
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Chang-Geng Ruan
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China. E-mail:
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Ma ZN, Ling J, Shen F, Xie LQ, Yin J, Su J, Ruan CG. [Identification of Monoclonal Antibodies against von Willebrand Factor Cleaving Protease (ADAMTS13) and Their Function]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2016; 24:1104-9. [PMID: 27531783 DOI: 10.7534/j.issn.1009-2137.2016.04.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To construct and identify the monoclonal antibodies against von willebrand factor cleaving protease(ADAMTS13), and to study their biological function. METHODS BALB/c mice were immunized by purified recombinant ADAMTS13 truncated eukaryotic protein (ADAMTS13-T7). Murine anti-human ADAMTS13 monoclonal antibodies (McAbs) were constructed by standard hybridoma technology and identified by ELISA. The recognition of McAbs with full-length recombinant ADAMTS13 protein was identified by Western blot. In function assay, the influence of McAbs on the proteolysis of vWF by ADAMTS13 was observed. RESULTS A group of 6 murine anti-ADAMTS13 McAbs was obtained with the clone number 1G11, 2F11, 6G3, 9E1, 10A8 and 10B4. In ELISA, the highest titers of 1G11 and 2F11 were observed, both of which showed a higher affinity to ADAMTS13-T7 than full-length ADAMTS13. The Western blot demonstrated that the 6 McAbs all could recognize ADAMTS13, among which 1G11 and 2F11 showed stronger reaction with ADAMTS13. In addition, under the denatured conditions, 1G11 and 2F11 could inhibit hydrolysis of vWF by ADAMTS13, and that was stronger with the increasing of McAbs concentration. CONCLUSION McAbs against ADAMTS13 have been gained, two of which are inhibitory antibodies.
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Affiliation(s)
- Zhen-Ni Ma
- Jiangsu Institute of Hematology,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health,The First Affiliated Hospital of Soochow University,Collaborative Innovation Center of Hematology,Soochow University,Suzhou 215000,Jiangsu Province,China
| | - Jing Ling
- Department of Hematology and Oncology, Children's Hospital of Soochow University, Suzhou 215000, Jiangsu Province,China
| | - Fei Shen
- Jiangsu Institute of Hematology,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health,The First Affiliated Hospital of Soochow University,Collaborative Innovation Center of Hematology,Soochow University,Suzhou 215000,Jiangsu Province,China
| | - Li-Qian Xie
- Jiangsu Institute of Hematology,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health,The First Affiliated Hospital of Soochow University,Collaborative Innovation Center of Hematology,Soochow University,Suzhou 215000,Jiangsu Province,China
| | - Jie Yin
- Jiangsu Institute of Hematology,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health,The First Affiliated Hospital of Soochow University,Collaborative Innovation Center of Hematology,Soochow University,Suzhou 215000,Jiangsu Province,China
| | - Jian Su
- Jiangsu Institute of Hematology,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health,The First Affiliated Hospital of Soochow University,Collaborative Innovation Center of Hematology,Soochow University,Suzhou 215000,Jiangsu Province,China
| | - Chang-Geng Ruan
- Jiangsu Institute of Hematology,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health,The First Affiliated Hospital of Soochow University,Collaborative Innovation Center of Hematology,Soochow University,Suzhou 215000,Jiangsu Province,China. E-mail:
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Ouyang HY, Yu ZJ, Yin J, Zhao XJ, Wang ZY, Zhang W, Ma ZN, Su J, Bai X, Ruan CG. [Acquired von Willebrand syndrome in three patients and literature review]. Zhonghua Xue Ye Xue Za Zhi 2016; 37:692-5. [PMID: 27587252 PMCID: PMC7348543 DOI: 10.3760/cma.j.issn.0253-2727.2016.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To deepen the understanding of acquired von Willebrand syndrome (AVWS). METHODS The clinical data of 3 patients were analyzed and related literature were reviewed. RESULTS ① Case 1, a 70- year- old male, diagnosed as Waldenstrom macroglobulinemia and AVWS, was presented with spontaneous epitaxis and bruising. The VWF∶Ag level was 16%. Treatment was initiated with VWF concentrates. Two cycles of chemotherapy with Bortezomib, thalidomide and Dexamethasone were followed. Partial remission was achieved. Half- year' follow- up showed no sign of spontaneous hemorrhage. ② Case 2, a 48- year- old female, diagnosed as monoclonal gammopathy of undetermined significance and AVWS, was presented with repeated epitaxis. The VWF∶Ag level was 7%. Because the bleeding was slight and self-relieved, no specific treatment was addressed. She was followed up for one and a half year. ③ Case 3, a 50- year- old man, diagnosed as monoclonal gammopathy of undetermined significance and AVWS, was referred to our hospital for presentation with significant hematomas. VWF∶ Ag was reduced to 12%. VWF- containing cryoprecipitate, plasma, intravenous immunoglobulin and rituximab were used to control his bleeding symptom. During the follow-up, spontaneous hemorrhage still occurred occasionally. CONCLUSIONS Acquired von Willebrand syndrome presented with heterogeneous symptoms. The level of VWF∶Ag and VWF∶Rco for patients with bleeding disorder should be performed. Abnormal bleeding symptoms in elderly patients without personal or family history of bleeding should prompt consideration of the underlying disorders. Treatment included controlling acute bleeding, curing the underlying diseases and preventing bleeding in high- risk situations. The prognosis of acquired von Willebrand syndrome is mainly related to the underlying diseases.
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Affiliation(s)
| | - Z J Yu
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215006, China
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Zhang WJ, Han Y, Ma ZN, Wang Q, Tang YQ, Wang J, Su J, Sun AN, Wang ZY, Ruan CG, Wu DP. [Changes of ADAMTS13 activity and vWF antigen level in patients with acute myelogenous leukemia and their significance]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2015; 22:1503-7. [PMID: 25543464 DOI: 10.7534/j.issn.1009-2137.2014.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was purposed to investigate the changes of von Willebrand factor cleaving protease (ADAMTS13) activity and vWF antigen level in patients with acute myelogenous leukemia (AML) before and after treatment and evaluate their clinical significance. Seventy-three AML patients were enrolled in this study, the sodium citrate anticoagulated plasma was collected before and after their induction chemotherapy. Fluorescence resonance energy transfer substrate vWF73 (FRETS-vWF73) assay was established to detect the plasma ADAMTS13 activity while vWF antigen level was measured by ELISA. The results showed that the ADAMTS13 activity in newly diagnosed patients with AML before induction therapy was obviously lower than that in normal controls (63.3 ± 25.5)% vs (105.1 ± 37.7)(P < 0.01), while the vWF antigen level was higher than that in normal controls (226.6 ± 127.0)% vs (111.4 ± 39.7)% (P < 0.01). After standard induction chemotherapy, the ADAMTS13 activity of AML patients in complete remission period was higher than that in AML patients before therapy (P < 0.01), and was not significant difference with that in normal controls; the vWF antigen was significantly lower than that in AML patients before therapy (P < 0.01), but it still was higher than that in controls (P < 0.05). The ADAMTS13 activity in newly diagnosed AML patients complicated with infection before therapy was obviously lower than that in AML patients without infection (52.2 ± 20.6)% vs (73.9 ± 24.7)% (P < 0.01), while the vWF antigen level was significantly higher than that in AML patients without infection (262.2 ± 135.7)% vs (193.8 ± 110.2)% (P < 0.05). The ADAMTS13 activity in AML patients with disseminated intravascular coagulation (DIC) was significantly lower than that in AML patients without DIC (42.0 ± 14.5)% vs (73.4 ± 22.7)% (P < 0.01), while the vWF antigen level was obviously higher that in AML patients without DIC (274.2 ± 140.0)% vs (204.7 ± 115.5)% (P < 0.01). It is concluded that the ADAMTS13 activity in newly diagnosed AML patients befor induction therapy has been confiremed to be lower and the vWF antigen level to be higher, especially in AML patients with infection or DIC. The ADAMTS13 and vWF antigen may play a role in the pathogenesis of AML and the formation of infection and DIC.
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Affiliation(s)
- Wen-Juan Zhang
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
| | - Yue Han
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China. E-mail:
| | - Zhen-Ni Ma
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
| | - Qian Wang
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
| | - Ya-Qiong Tang
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
| | - Jie Wang
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
| | - Jian Su
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
| | - Ai-Ning Sun
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
| | - Zhao-Yue Wang
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
| | - Chang-Geng Ruan
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
| | - De-Pei Wu
- Department of Hematology, The First Affiliated Hospital of Suzhou University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou 215006, Jiangsu Province, China
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Yin J, Ma ZN, Zhao XJ, Ruan CG. [Isolation, culture and characterization of outgrowth endothelial cells from the human peripheral blood]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2014; 22:1711-5. [PMID: 25543502 DOI: 10.7534/j.issn.1009-2137.2014.06.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Compared with endothelial progenitor cells, outgrowth endothelial cells (BOECs) from peripheral blood are rich in protein for blood angiogenesis and cell adhesion, similar to mature endothelial cells in biological characteristics. Moreover, they are now replacing human umbilical vein endothelial cells for the latter's limited life span and drift of phenotype, and might become a new tool for exploring the vascular abnormalities. This study was aimed to establish the protocol of producing BOECs, and then analyze the cell phenotype and function of BOECs. Mononuclear cells were collected from peripheral blood by gradient centrifugation and then seeded on plates and cultivated in EGM-2 medium for 4 weeks. The morphological changes of cells were observed and cell phenotype was examined by flow cytometry. VWF multimers were used to analyse the distribution of vWF multimers in superment of BOECs and the storage of vWF in BOECs, and the secretion of vWF in BOECs under stimulation was detected by confocal fluorescence microscopy. The results showed that after 4-week-culture in vitro, the cell colonies and characteristic cobblestone-like morphology of BOECs were found in plates. For another three weeks of expansion, BOECs expressed CD31, CD34, and EPCR, without the expression of CD14, CD45 and CD133. The vWF from BOECs cell supernatant shared the same multimer pattern as that in normal plasma. By confocal fluorescence microscopy, vWFs were observed in BOECs. The amount of vWF increased in cells, and vWF strings were formed on cell surface by the stimulation of phorbol-12-myristate-13-acetate(PMA). It is concluded that the BOECs are first successfully established, and the phenotype and function of BOECs are analyzed. They are the native cell models for the pathogenesis of von Willebrand diseases (vWD), and may be used as new gene therapy tools for vWD.
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Affiliation(s)
- Jie Yin
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215006, Jiangsu Province, China; Department of Hematology, Northern Jiangsu People's Hospital, Yangzhou 225006, Jiangsu Province, China
| | - Zhen-Ni Ma
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Xiao-Juan Zhao
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Chang-Geng Ruan
- Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, The First Affiliated Hospital of Soochow University, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215006, Jiangsu Province, China. E-mail:
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10
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He XY, Yao H, Ma ZN. Investigation and analysis of contraceptive measures towards different reproductive-aged women in Yangzhou. CLIN EXP OBSTET GYN 2014; 41:704-708. [PMID: 25551968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE This study aims to retrospectively investigate the contraceptive methods of different reproductive-aged women in two different regions of Yangzhou, China, to understand the changes of the contraceptive methods, and to analyze the targeted improvements of future informed choices of contraception and birth control, and reduce the occurrence of the unintended pregnancies. MATERIALS AND METHODS This study included 13,407 and 20,876 married reproductive-aged women (MCW) that were chosen from a city downtown and a county-level city, respectively, for the group-organized random sampling questionnaire survey. RESULTS There was a significant urban-rural difference in the choice of contraceptive methods in different MCW. The female choices of contraception were single; the accessibility of contraceptive supplies, and personalized services could improve the implementation rate of long-term contraceptive measures. The cooperation of male contraceptive responsibility was related to the education levels and enhanced male-female communication. CONCLUSIONS It was very important for urban and rural women with different ages to choose different contraceptive measures, suggesting that these choices require the development of different educational models towards women of different ages and regions. The accessibility to various aspects of counseling and contraceptive measures should be strengthened, meanwhile male participation should also be promoted to prevent unwanted pregnancies and to reduce the health hazards related to sexual activities.
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Affiliation(s)
- X Y He
- Department of Population Health, Hospital of Maternal and Child Health, Yangzhou, China.
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11
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Ling J, Ma ZN, Su J, Ruan CG. [Construction of ADAMTS13-pEGFP-N1 vector and its expression in HeLa cells]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2013; 21:126-9. [PMID: 23484705 DOI: 10.7534/j.issn.1009-2137.2013.01.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study was aimed to construct a pEGFP-N1 vector of von Willebrand factor cleaving protease (ADAMTS13, a disintegrin and metalloprotease with a thrombospondin type 1 motifs 13) so as to pave the way for further studying its synthesis and secretion. Human full-length cDNA sequence of ADAMTS13 was acquired by polymerase chain reaction (PCR) with Phusion(®) High-Fidelity (NEB), then the PCR product was double digested with EcoRI and XhoI. After digestion, the ADAMTS13 cDNA sequence was purified and recombined with the pEGFP-N1 vector. The DNA sequence analysis showed that ADAMTS13 was ligated to the pEGFP-N1 vector correctly. After transient expression in HeLa cells, the expression of EGFP could be detected by fluorescent microscopy, and the expression of ADAMTS13 protein could be detected by SDS-PAGE and Western blot. It is concluded that the ADAMTS13-pEGFP-N1 vector is successfully constructed, and it can be widely used in further research on the mechanism of the synthesis and secretion of ADAMTS13.
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Affiliation(s)
- Jing Ling
- Jiangsu Institute of Hematology, Jiangsu Province, China
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Wang AY, Liu F, Ma ZN, Dong NZ, Zhang JY, Ruan CG. [Research on the C-terminal domain of ADAMTS13 regulates its cleaving activity]. Zhonghua Xue Ye Xue Za Zhi 2010; 31:830-834. [PMID: 21223741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To study the influence of C-terminal domain of ADAMTS13 on its cleaving activity. METHODS The full-length wild-type (WT) and C-terminal domain truncated type (TT, TSP8 + CUB domains were deleted) of human ADAMTS13 recombinant protein were transfected into and permanent expressed on Hela cells. Western blot and R-CBA were used to directly detect the activities of the two recombinant proteins under the static and stressed condition respectively. ELISA was used to compare the binding abilities of the two proteins by coating with vWF. RESULTS The recombinant proteins were identified by Western blot with anti-his-tag or anti-ADAMTS13 antibodies. With pretreatment of 1.5 M urea, the enzyme activity of TT was significantly higher than that of WT, and so did in binding ability with vWF While, only WT could cleave vWF under high stress. CONCLUSION The distal carboxyl-terminal TSP8 together with CUB domains of ADAMTS13 may affect the enzyme activity by regulating the binding of ADAMTS13 to vWF in different conditions, and they are very important for the enzyme activity under high stress force condition.
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Affiliation(s)
- An-You Wang
- Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou 215006, China
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13
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Wang AY, Dong NZ, Ma ZN, Zhang JY, Su J, Ruan CG. Evaluation and clinical application of a new method for detecting ADAMTS13 activity. Chin Med J (Engl) 2010; 123:1859-1863. [PMID: 20819568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Abstract
BACKGROUND A severe deficiency of ADAMTS13 activity contributes to the pathogenesis of thrombotic thrombocytopenic purpura (TTP). Measuring the activity of ADAMTS13 is helpful for the diagnosis of TTP and the prognostic monitor in TTP patients. Most available assays are cumbersome and costly, so not easily adapted to routine laboratories. ADAMTS13 cleaves von Willebrand factor (VWF) within the domain A2, located between domains A1 and A3. Therefore, specific assays for ADAMTS13 activity could be based on the different structures of VWF before and after the cleavage. Using this hypothesis we try to establish a new and simple method to determine ADAMTS13 activity. METHODS First, plasma samples were exposed in denaturing condition to allow cleavage of VWF by ADAMTS13. Then, the ADAMTS13 activity was measured with two novel monoclonal antibodies, SZ-129 and SZ-125, which specifically recognize the VWF A1 and A3 domains by using a two-site sandwich ELISA. Compared with a residual-collagen binding assay (R-CBA), plasma ADAMTS13 activities in 161 samples were assessed, and the inhibitory activities of ADAMTS13 autoantibody in 24 TTP patients were determined. The relationship of these two assays was analyzed by linear correlation, and the sensitivity and specificity of the new assay was also evaluated. RESULTS Plasma ADAMTS13 activities in normal people and TTP, acute myocardial infarction (AMI), and idiopathic thrombocytopenic purpura (ITP) patients determined by the new assay were (89.75 +/- 7.93)%, (17.63 +/- 18.71)%, (68.55 +/- 18.08)%, (85.83 +/- 9.84)%, respectively. Results were consistent with those of R-CBA, the squared correlation factor was 0.9183 of the two assays. The new assay can easily discriminate a TTP plasma sample from a non-TTP plasma sample (P < 0.01), and the coefficient of variation for the new assay was 6.17%. In 23 idiopathic TTP patients, the inhibitor activity of ADAMTS13 autoantibody ranged from 12% to 100%, while no inhibitory activity was detected in one hereditary TTP patient. CONCLUSION This new and simple assay for ADAMTS13 activity could be used routinely in the clinic to determine the activity of ADAMTS13.
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Affiliation(s)
- An-You Wang
- Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
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Zhao XJ, Wang ZY, Jiang MH, Zhang W, Cao LJ, Ma ZN, Dong NZ, Bai X, Yu ZQ, Ruan CG. [Inherited dysfibrinogenemia caused by Arg16His mutation in alpha chain of fibrinogen.]. Zhonghua Xue Ye Xue Za Zhi 2010; 31:154-156. [PMID: 20510102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE To analyze the phenotype and genotype of a family with inherited dysfibrinogenemia. METHODS Assays of coagulation, including activated partial thromboplastin time (APTT), prothrombin time (PT) and thrombin time (TT), were carried out with Stago Compact in the proband and his family members. The activity and antigen of fibrinogen in plasma were determined by Clauss and immunoturbidimetry, respectively. Fibrinogen and its constituent were analyzed by Western blot with nonreducing 4%-20% SDS-polyacrylamide gel electrophoresis (PAGE). All exons and exon-intron boundaries of fibringen genes FGA, FGB and FGG were analyzed by PCR and then direct sequencing. RESULTS The proband had normal APTT and PT, but prolonged TT. The activity of fibrinogen in plasma was decreased while its antigen level was normal. These abnormalities were also found in his mother and a sister. Genetic analysis revealed heterozygous G1233A in the exon 2 of FGA originating from his mother, which resulted in Arg16His missense mutation. CONCLUSION Inherited dysfibrinogenemia was caused by Arg16His mutation in exon 2 of FGA, and this is the first case reported in a Chinese family.
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Affiliation(s)
- Xiao-Juan Zhao
- Jiangsu Institute of Hematology, the First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou 215006, China
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