Platelet aggregation test (PAgT), platelet adhesion test (PAdT), thromboplastic activity of factor Ⅷ (FⅧ∶c), antithrombin Ⅲ activity (AT-Ⅲ∶a), antithrombin Ⅲ antigen (AT-Ⅲ∶Ag), von willebrand factor (vWF) and fibrinogen (Fg) were measured in 33 patients with biliary tract diseases and 24 normal individuals. The results showed that there was no significant difference in PAgT, PAdT, AT-Ⅲ∶a and AT-Ⅲ∶Ag between the two groups (Ｐ＞0.05). Fg increased more significantly in biliary tract disease than in the controls (Ｐ＜0.01). FⅧ∶c increased more significantly in patients with obstructive jaundice than in that of nonjaundiced and the controls (Ｐ＜0.01). The levels of vWF increased higher and higher in the sequence of patients with no jaundice, obstructive jaundice due to benign diseases and obstructive jaundice due to malignancy(Ｐ＜0.01). In conclusion, Fg, FⅧ∶c and vWF increased in patients with biliary tract disease.
Objective To observe the levels of von Willebrand factor ( vWF) expressed by human umbilical vein endothelial cells ( HUVECs) infected by aspergillus fumigatus ( AF) alone or treatment with cytochalasin D, N-cadherin monoclonal antibody, dexamethasone, respectively, so as to explore the mechanism of angioinvasion in invasive aspergillosis. Methods An in vitro model of HUVECs infected by AF hypha was established. The experiment included six groups, ie. a sham control group, a TNF-αgroup, an AF hypha group, a cytochalasin D group, a N-cadherin antibody group, and a dexamethasone group. Cell supernatants were collected to detect the levels of vWF at 2 h, 6 h, 12 h, and 18 h by enzyme linked immunosorbent assay ( ELISA) . Results Compared with that of vWF at 2 h, the level was higher at 18 h in the sham controlgroup and the TNF-αgroup, and higher at 6 h, 12 h, and 18 h in the other groups( P lt; 0. 05) . Compared with the sham control group, the level of vWF in each experiment group increased at 2 h, 6 h, 12 h, and 18 h except that in the N-cadherin antibody group at 2 h ( P lt; 0. 05) . The level of vWF in TNF-α group was higher than that in the AF hypha group at 2 h, but lower at 18 h. ( P lt; 0. 05) . The level of vWF was not significantly different between the cytochalasin D group and the AF hypha group at each time point. The level of vWF was lower in the N-cadherin antibody group than that in the AF hypha group at 2 h and 6 h ( P lt;0. 05) . The level of vWF was not significantly different between the dexamethasone group and the AF hypha group at each time point. Conclusion HUVECs infected by AF hypha overexpress vWF. N-cadherinmonoclonal antibody can reduce the expression of vWF, but cytochalasin D or dexamethasone has no significant effect on it.
【摘要】 目的 探讨血栓性血小板减少性紫癜（thrombotic thrombocytopenic purpura，TTP）患者血管内皮损伤程度，以及不同类型TTP之间血管内皮损伤差异性。 方法 纳入2005年4月-2010年12月特发性TTP患者17例（A组），继发性TTP患者15例（B组），骨髓移植相关TTP患者2例（C组），疑似TTP患者11例（D组），共45例；另选取健康体检志愿者为对照组10例（E组）。采用双夹心酶联免疫吸附试验测定血管性血友病因子前肽（von Willebrand factor propeptide，vWFpp）水平。 结果 vWFpp水平为其与正常混合血浆的比值， A组为2.2，B组为2.34，C组为2.795，D组为1.72，E组为1.08。A、B、C、D组患者vWFpp水平与E组比较，差异有统计学意义（Plt;0.05），A、B、C、D组间比较，差异无统计学意义（Pgt;0.05）。 结论 TTP患者vWFpp水平明显增高，提示血管内皮损伤明显，但vWFpp水平不能用于鉴别TTP类型。【Abstract】 Objective To explore the severity of endothelium injury in patients with thrombotic thrombocytopenic purpura (TTP) and the differences among different subtypes of TTP. Methods The clinical data of 45 patients with TTP diagnosed between April 2005 and December 2010 were retrospectively analyzed. von Willebrand factor propeptide (vWFpp) was measured by sandwich ELISA in 17 patients with idiopathic TTP (group A), 15 patients with secondary TTP (group B), 2 patients with transplantation associated TTP (group C), 11 patients with suspected TTP (group D) and 10 control healthy volunteers (group E). Results Median times of vWFpp of the five groups were 2.2, 2.34, 2.795, 1.72, and 1.08 respectively. Plasma vWFpp levels of the first four groups didn′t differ much between each other (Plt;0.05), but the differences were significant compared with the data in the control group (Pgt;0.05). Conclusions Significantly increased vWFpp level in patients with TTP indicates obvious endothelium injury. Nevertheless, it could not be used to differentiate TTP types.
Objective To analyze the predictive value of von Willebrand factor (vWF) and acute physiology and chronic health evaluation Ⅱ (APACHEⅡ) score on severity and prognosis of acute respiratory distress syndrome (ARDS). Methods The ARDS patients who were admitted between January 2010 and May 2012 were recruited in the study. APACHEⅡ score and plasma vWF were detected on the first day and the third day after diagnose of ARDS. The patients were divided intoasurvival group andadeath group according the prognosis. The predictive value of vWF and APACHEⅡ score on prognosis were analyzed by the receiver operating characteristic (ROC) curve. Lung injury score was calculated and its relationship with vWF and APACHEⅡ score were analyzed. Results One-hundred and twelve cases of ARDS were enrolled. There were no significant differences between the survival group and the death group in sex, age, respiration rate, blood pressure, white blood cells, procalcitonin or C-reactive protein (P > 0.05). On the first day after diagnosis of ARDS, the APACHEⅡ score and vWF level of the survival group were significantly lower than those in the death group (P < 0.05). On the third day, the APACHEⅡ score was increased but vWF level declined compared with those on the first day (P < 0.05). On the first day, lung injury score of the survival group was 1.7±0.4, significantly lower than that in the death group (2.5±0.6). On the third day, lung injury score in the survival group decreased, while lung injury score of the death group was significantly increased (P < 0.05). On the first day, vWF and APACHEⅡ score were positively correlated with lung injury score (r=0.75, P < 0.05; r=0.79, P < 0.05), respectively. On the first day, the area under the ROC curve of APACHEⅡ score and vWF were 0.87 and 0.91, respectively (P < 0.05). Conclusion APACHEⅡ score and vWF have high diagnostic value in evaluating the degree of lung injury and predicting the prognosis of patients with ARDS.
Objective To investigate the clinical outcomes of total knee arthroplasty (TKA) by using the condylar constrained knee prosthesis in the treatment of destructive hemophilic arthritis. Methods Between September 2007 and July 2015, 8 cases (8 knees) of destructive hemophilic arthritis accepted TKA by using condylar constrained knee prosthesis. All patients were male, aged 22 to 56 years, with an average age of 35 years. The disease course of hemophilia A was 3-30 years (mean, 17.3 years). Preoperative range of motion (ROM) was (68.1±32.6)°; the flexion deformity was (14.38±16.13)°. Six patients had valgus of 7-35° (mean, 17.3°), of whom, one had fixed dislocation of patella; and one had varus of 15°. Hospital for Special Surgery (HSS) knee score was 52.5±12.9. Pre-operative X-ray film examination demonstrated narrowing of the knee gap and cystic degeneration of articular cartilage and subchondral bone. Results All patients achieved primary wound healing, and were followed up 1-9 years (mean, 5 years). Tense blister with common peroneal nerve damage and extension penetrating into distal tibial cortex occurred in 1 case respectively, which were cured corresponding treatment. At last follow-up, the knee ROM and the flexion deformity were significantly improved to (98.1±8.9)° and (0.63±1.77)° (t=–2.527,P=0.036;t=2.396,P=0.047). At 2 weeks after operation and last follow-up, the HSS scores were significantly increased to 77.3±11.0 and 85.0±9.0 (P<0.05). X-ray film showed that lower extremity alignment returned to normal in patients with varus and valgus. Conclusion Good curative effect can be get by using condylar constrained knee prosthesis in TKA for the treatment of destructive hemophilic arthritis.
Objective To be aware of the treatment status and economic burden of people with hemophilia (PWH) in mainland China, so as to seek the optimal therapy for them. Methods The relevant Chinese and English databases such as CBM, CNKI, VIP, WanFang Database, PubMed, EMbase and The Cochrane Library (Issue 6 of 12, June 2011) were searched in June, 2011. The economic analyses and studies on PWH treatment and economic burden published from 1980 to 2011 were collected. Results The diagnosis and treatment of PWH in mainland China lagged behind. More than 30% of PWH did not receive or occasionally received treatment, and less than 10% received prophylactic therapy. Lots of PWHs still used FFP or cryoglobulin which were easily to cause blood-borne viral diseases. More than half of PWH families could afford a little or completely could not afford the therapy. Low dose prophylactic therapy was cost-efficient than on-demand therapy. Based on the therapy status, it was estimated that approximately RMB 53 844 yuan per year per patient should be put into practice in order to have PWH received low-dose prophylactic therapy, and to prevent 80% of bleeding. Conclusion PWH in mainland China is poor in treatment status and heavy in economic burden, so it is an optimal way to adopt comprehensive care model and low-dose prophylactic therapy in mainland China.