狼疮样抗凝物质对肺血栓栓塞症的影响

目的　探讨狼疮样抗凝物质 (LA)与肺血栓栓塞症 (PTE)形成的关系。方法　采用血浆蝰蛇毒时间 (RVVT)测定 38例PTE患者 [PTE组 ,其中急性大面积PTE 17例 (大面积PTE组 ) ,次大面积PTE 2 1例 (次大面积PTE组 ) ]和 30名正常人 (对照组 )的LA比值 ;采用发色底物法检测血浆蛋白C活性 (PC∶A) ;放射免疫法测定血栓烷B2 (TXB2 )、6 酮 前列腺素F1α(6 keto PGF1α)含量并计算TXB2 / 6 keto PGF1α比值。结果　PTE组LA比值在次大面积PTE组为 1 19± 0 10、大面积PTE组为 1 2 8±0 11,TXB2 含量次大面积PTE组为 (2 2 2± 83)ng/L、大面积PTE组为 (2 98± 10 1)ng/L ,TXB2 / 6 keto PGF1α比值次大面积PTE组为 9 99± 5 6 7、大面积PTE组为 18 35± 8 88,PTE两组明显高于正常对照组 (P<0 0 1) ,其中大面积PTE组明显高于次大面积PTE组 (P <0 0 1) ;次大面积PTE组、大面积PTE组的PC∶A和 6 keto PGF1α均明显低于正常对照组 (P <0 0 1)。结论　LA可导致PTE患者TXB2 / 6 keto PGF1α比值升高、PC∶A降低。PTE的发生与LA比值的增高有关

The effects of lupus anticoagulant on pulmonary thromboembolism

OBJECTIVE: To evaluate the effects of lupus anticoagulant (LA) on pulmonary thromboembolism (PTE). METHODS: Thirty-eight patients with PTE (17 massive and 21 submassive) and 30 healthy adults were studied. Russell's viper venom time (RVVT) was used to examine the ratio of LA (LAR), and a colorimetric method was used to detect the activity of plasma protein C (PC:A) and radioimmunoassay (RIA) was employed to measure the level of plasma thromboxane B(2) (TXB(2)) and 6-keto-prostaglandin F1alpha (6-keto-PGF1alpha). RESULTS: Compared with the normal group, LAR, TXB(2) and TXB(2)/6-keto-PGF1alpha showed significant increase in the massive PTE and the submassive PTE groups (P < 0.01), and the levels were higher in the massive group than in the submassive group (P < 0.01). Both groups showed significant decrease in PC:A and 6-keto-PGF1alpha compared with the normal group (P < 0.01). CONCLUSIONS: LA can increase TXB(2)/6-keto-PGF1alpha and decrease PC:A in patients with PTE. It is suggested that there may be an association between the increase of LAR and the presence of PTE.