PMID- 16792917 OWN - NLM STAT- MEDLINE DCOM- 20090819 LR - 20201209 IS - 0253-2727 (Print) IS - 0253-2727 (Linking) VI - 27 IP - 3 DP - 2006 Mar TI - [Effect of anti-Helicobacter pylori ureB monoclonal antibody on platelet aggregation and activation, and its mechanism study]. PG - 166-9 AB - OBJECTIVES: To study the effect of monoclonal antibody (McAb) against helicobacter pylori (Hp) ureB, 1F11 on platelet aggregation and activation, and its mechanism. METHODS: The relativity between human platelet glycoproteins (GPs) and Hp ureB was identified by Western blot and FCM. Platelet aggregation was measured by turbidimetry, and P-selectin and TXB2 assay by ELISA. RESULTS: 1F11 could bind to platelet GPIIIa, and ADP-induced platelet aggregation was inhibited by 1F11 in a dose-dependent manner. However, 1F11 had no effect on plasma P-selectin and TXB2 induced by ADP. The FCM results show that the positive rates of platelet binding to FITC-SZ21 was decreased from 99.5% to 77.4% after addition of 1F11. CONCLUSION: McAb against Hp ureB 1F11 inhibits platelet aggregation through binding to platelet GPIIIa but does not block platelet activation. There might be crossed-epitopes on Hp ureB and platelet GPIIIa, and Hp infection might be involved in ITP immunopathology. FAU - Bai, Yan-yan AU - Bai YY AD - Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215006, China. FAU - Wang, Zhao-yue AU - Wang ZY FAU - Bai, Xia AU - Bai X FAU - Miao, Jing-cheng AU - Miao JC FAU - Zhang, Wei AU - Zhang W FAU - Dai, Lan AU - Dai L FAU - Shen, Wen-hong AU - Shen WH FAU - Ruan, Chang-geng AU - Ruan CG LA - chi PT - Journal Article PL - China TA - Zhonghua Xue Ye Xue Za Zhi JT - Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi JID - 8212398 RN - 0 (Antibodies, Bacterial) RN - 0 (Antibodies, Monoclonal) RN - 0 (Bacterial Proteins) RN - 0 (Integrin beta3) RN - 0 (P-Selectin) RN - EC 3.4.21.73 (Urokinase-Type Plasminogen Activator) RN - EC 3.5.1.5 (Urease) SB - IM MH - Antibodies, Bacterial/pharmacology MH - Antibodies, Monoclonal/*pharmacology MH - Bacterial Proteins/*immunology/metabolism MH - Helicobacter pylori/*immunology MH - Humans MH - Integrin beta3/immunology MH - P-Selectin/immunology MH - Platelet Activation/*drug effects MH - Platelet Aggregation/*drug effects MH - Urease/immunology MH - Urokinase-Type Plasminogen Activator/immunology EDAT- 2006/06/24 09:00 MHDA- 2009/08/20 09:00 CRDT- 2006/06/24 09:00 PHST- 2006/06/24 09:00 [pubmed] PHST- 2009/08/20 09:00 [medline] PHST- 2006/06/24 09:00 [entrez] PST - ppublish SO - Zhonghua Xue Ye Xue Za Zhi. 2006 Mar;27(3):166-9.