Objective: To observe the effect of Xiaoyu Zhixue tablet (消瘀止血片,XYZXT) on the expression of platelet membrane glycoproteins in patients with hemorrhagic thrombopathy, and to explore its possible mechanism. Method...Objective: To observe the effect of Xiaoyu Zhixue tablet (消瘀止血片,XYZXT) on the expression of platelet membrane glycoproteins in patients with hemorrhagic thrombopathy, and to explore its possible mechanism. Methods: The total of 148 patients with hemorrhagic thrombopathy were randomly divided into two groups, the traditional Chinese medicicne (TCM) group (n=98) treated with XYZXT and the Western medicine (WM) group (n=50) treated with adrenosin, vitamins C, K and P, both for 6 months. The therapeutic effect and the recovery rate of platelet aggregation in the two groups were observed. And platelet membrane glycoprotein (GP) Ⅰb/Ⅸ, GPⅡb/Ⅲa complexes, GPⅠb, GPⅡb, GP Ⅲa and P-selectin were analyzed by flow cytometry in both groups before and after treatment and also in 34 normal healthy subjects. Results: The total effective rate of hemostasis was 89. 8% in TCM group and 54. 0% in the WM group (x2=45.83, P<0.01), and the recovery rate of platelet aggregation was 72.4% and 4.0% respectively (x2=62.06, P<0.01). The fluorescence intensity of GP Ⅰ b/Ⅸ, GPⅡb/Ⅲa complexes, GPⅠb, GPⅢa and P-selectin were lower in both groups before treatment than those in the healthy subjects. Expression of above-mentioned marks was elevated in TCM group after 6 months' therapy, which was insignificantly different as compared with the healthy subjects (P>0.05) and higher than those in the WM group (P<0.05). Conclusion: One of the mechanisms in treating hemorrhagic thrombopathy with XYZXT is that it could regulate the expression of GP Ⅰb/Ⅸ, GPⅡ b/Ⅲa complexes, GPⅠb, GPⅢa and P-selectin at the level of receptor protein.展开更多
To investigate the role of platelet membrane glycoprotein （GP） Ib/Ⅸ/Ⅴ complex and its subunit GP Ibα in patients with hemorrhagic thrombopathy （HT）, the expressions of GP Ib/Ⅸ/Ⅴ complex and GP Ibα,defined as...To investigate the role of platelet membrane glycoprotein （GP） Ib/Ⅸ/Ⅴ complex and its subunit GP Ibα in patients with hemorrhagic thrombopathy （HT）, the expressions of GP Ib/Ⅸ/Ⅴ complex and GP Ibα,defined as mean fluorescence intensity （MFI）, were assessed by flow cytometry. The maximum aggregation of platelet was determined by turbidity method. These indicators were compared among 68 HT patients with the presenting complaint of hemorrhage, 33 well-controlled HT patients and 32 normal healthy subjects. The results showed that the MFI of GP Ib/Ⅸ /Ⅴ complex and GP Ibα was markedly lower in HT patients with current hemorrhage than that in the healthy subjects, with difference being statistically significant （P〈0.05）. There was no significant difference in the expressions of GP Ib/ Ⅸ/ Ⅴ complex and GP Ibα between well-controlled HT patients and normal healthy subjects （P〉0.05）. It was concluded that the expression of GP Ib/Ⅸ /Ⅴ complex, the receptor of thrombin and von Willebrand factor, was down-regulated in HT patients with current hemorrhage, which might result in the dysfunction of platelet aggregation and recurrence of HT.展开更多
To explore the correlation between the C807T polymorphism of platelet membrane glycoprotein Ⅰa （GP Ⅰa） gene and aspirin resistance in Chinese people, 200 patients with high-risk of atherosclerosis took aspirin （1...To explore the correlation between the C807T polymorphism of platelet membrane glycoprotein Ⅰa （GP Ⅰa） gene and aspirin resistance in Chinese people, 200 patients with high-risk of atherosclerosis took aspirin （100 mg/d） for 7 days. Platelet aggregation function was detected using adenosine diphosphate （ADP） and arachidonic acid （AA） before and after the administration of aspirin. Then the subjects were divided into three groups according to the results of platelet aggregation function： an aspirin resistant （AR） group, an aspirin semi-responder （ASR） group and an aspirin-sensitive （AS） group. Platelet GP Ⅰa gene 807CT polymorphism was examined by means of polymerase chain reaction-sequence specific primers （PCR-SSP）. The results showed that T allelic frequency in AR group and ASR group were higher that of AS group （P〈0.005）, and the prevalence of genotypes （TT＋TC） of these two groups was significantly higher than that in AS group （P〈0.05）. Platelet GP Ⅰa T allele was significantly associated with aspirin resistance as revealed by multiple logistic regression （OR=3.76, 95% CI： 2.87-9.58）. The results suggest that inherited platelet GP Ⅰa variations may have an important impact on aspirin resistance and the presence of GP Ⅰa T allele may be a marker of genetic susceptibility to aspirin resistance.展开更多
The redistribution of platelet membrane glycoprotein IV (GPIV) and the release of intracellular Q-granule thrombospondin (TSP) were examined and the inhibition of 5-thromboglobulin (&TG) and platelet factor 4 (PF4...The redistribution of platelet membrane glycoprotein IV (GPIV) and the release of intracellular Q-granule thrombospondin (TSP) were examined and the inhibition of 5-thromboglobulin (&TG) and platelet factor 4 (PF4) in patients with chronic myelogenous leukemia (CML) was observed and quantitation of β-TG and PF4 in sera was conducted. GPIV in inactive platelet from CML was 36080±17010 molecules/platelet as compared with 13190±4810 from the controls (P<0,01), No abnormality was found in the distribution of platelet membrane GPIb and GPIIb/III.(P>0. 05). The GPIV redistribution on active platelet membrane induced thrombin (1U/ml) from CML and healthy donors was 44320132310 and 228001 12700 molecules/platelet respectively (P<0. 01 ). The difference in the release of intracellular Q-granule TSP between CML and the control group was not found (P>0.05). There was no direct correlation between GPIV expression and TSP binding after platelet activation. The high leveIs of β-TG and PF4 in sera inhibited release of intracellular a-granule TSP in vitro. These results indicate that the abnormality of platelet membrane GPIV is a common marker in CML, therefore the specific increase of platelet GPIV in patients with CML may be a useful tool for the diagnosis and monitoring of the platelet dysfunction. The release of interna1 TSP pools is hindered by either β-TG or PF4 in sera.展开更多
Objective: To investigate the effect of dauricine on the irreversible platelet aggregability of patients with mitral stenosis (MS).Methods: Glycoprotein Ⅳ (GPⅣ ) and thrombospondin (TSP) levels on the membrane surfa...Objective: To investigate the effect of dauricine on the irreversible platelet aggregability of patients with mitral stenosis (MS).Methods: Glycoprotein Ⅳ (GPⅣ ) and thrombospondin (TSP) levels on the membrane surface of the stationary platelet or platelet activated by thrombin (0. 05 U/ml, 0. 1 U/ml,0. 5 U/ml, 1. 0 U/ml) in 16 patients with MS were measured with flow cytometric method and compared with those of the healthy (14 subjects). Results: The GPⅣ level of stationary platelet, the GPⅣ and TSP level of activated platelet in MS patients were higher than those in the healthy significantly (P < 0. 01,< 0. 05, < 0. 005 ), while the TSP level of stationary platelet in the patients was not different to the healthy (P > 0. 05). The GPⅣ redistribution on the activated platelet surface was apparently inhibited by dauricine (50 μmol/L, P < 0. 05 - 0. 005) and the release of TSP from intracellular α-granules was inhibited by dauricine only in the activated platelets induced by thrombin of low concentration (0. 05 U/ml and 0. 1 U/ml, P < 0. 05 - 0. 01 ), inhibiting effect was not found in those activated with high concentration of thrombin. Conclusion: The activity and reactivity to thrombin of platelets increased in MS patients, and dauricine was able to reduce the occurrence of the irreversible platelet aggregation in MS patients.Original article on CJIM(Chin) 1998; 18(8): 461展开更多
Objective： To investigate the effect of Xiaoyu Zhixue Tablet （消瘀止血片, XYZXT） on the expression of platelet membrane glycoprotein （GP） Ⅰ b/Ⅸ/Ⅴ complex and GP Ⅰ b α in patients with chronic renal failure ...Objective： To investigate the effect of Xiaoyu Zhixue Tablet （消瘀止血片, XYZXT） on the expression of platelet membrane glycoprotein （GP） Ⅰ b/Ⅸ/Ⅴ complex and GP Ⅰ b α in patients with chronic renal failure （CRF） in early metaphase. Methods： Fifty-one patients with CRF in early metaphase （treated group） were treated with XYZXT, 3 months as the course of treatment for 2 courses. The previous therapies remained unchanged. Flow cytometry was used to assess the expression of platelet GP Ⅰb/Ⅸ/Ⅴ complex and GP Ⅰb α in patients with CRF, and turbidity method was used to determine the platelet maximum aggregation rate （MAR）, meanwhile the renal function was measured. The final data were compared with those before the treatment, and with those in the normal control group （31 healthy subjects）. Results： Compared with the normal control group, expressions of GP Ⅰ b/Ⅸ/Ⅴ complex and GPⅠb α, and platelet MAR in CRF patients were significantly lower （P=0.007,P=0.001,P=0.009） before the treatment; after the treatment with XYZXT, the above indexes in CRF patients were remarkably increased （P=0.033,P=0.026, P=0.045）, but still lower than those in the normal control group, however, it was not statistically significant. Conclusion： （1） The expression of GP Ⅰ b/Ⅸ/Ⅴ complex in CRF patients of early metaphase was decreased, which lead to platelet aggregation dysfunction. This might be one of the reasons for the hemorrhagic trend in CRF. （2） XYZXT was able to upgrade expressions of GP Ⅰb/Ⅸ/Ⅴ complex and GPⅠb α in CRF patients, improve platelet function and clown-regulate platelet activation in patients with CRF.展开更多
OBJECTIVE: To explore platelet activation and the protective effect of aprotinin in patients with hepatolithiasis. METHODS: The count of plaletets and levels of CD_(62P) and CD_(63) were measured by flow cytometry in ...OBJECTIVE: To explore platelet activation and the protective effect of aprotinin in patients with hepatolithiasis. METHODS: The count of plaletets and levels of CD_(62P) and CD_(63) were measured by flow cytometry in 38 patients with hepatolithiasis. Several measurements were carried out after treatment with aprotinin. RESULTS: The levels of CD_(62P), CD_(63) in patients with hepalolithiasis were higher than those in patients with cholecystolithiasis (P<0.05), but the count of platelets was lower (P<0.05). After operation, the levels of CD_(62P), CD_(63) were significantly increased in patients with hepatolithiasis, but the count of platelets was lower (P<0.05). Postoperative levels of CD_(62P), CD_(63) were significantly lower in patients treated with aprotinin than in normal controls (P<0.05); but there was no significant change in the count of platelets in the two groups. CONCLUSION: Platelet activation occurs in patients with hepatolithiasis, and may be inhibited by aprotinin.展开更多
The platelet membrane glycoprotein (GP)Ⅱ b/Ⅲ a, GPIX were detected by immunogold assay and flow cytometry, respectively, in two cases of Glannzmann's thrombasthenia (GT). The immunogold assay showed that the...The platelet membrane glycoprotein (GP)Ⅱ b/Ⅲ a, GPIX were detected by immunogold assay and flow cytometry, respectively, in two cases of Glannzmann's thrombasthenia (GT). The immunogold assay showed that the GPⅡ b/Ⅲ a gold granules in GT were decreased obviously, compared with that in normal controls. Flow cytometry results showed that GPⅡ b/Ⅲ a in two cases of GT was 0.1 % and 0.5 % of normal control, respectively. While GPIX showed no difference between the GT and normal control. The patients' father showed no bleeding symptoms, whose GPⅡ b/Ⅲ a accounted for 36.99 % of normal control. The experiment results suggested that flow cytometry is a quick, simple and sensitive method for the diagnosis of GP disorders.展开更多
The deficiency of platelet function is the main defect of hemostatic mechanism during cardiopulmonary bypass (CPB), which attributed to the postoperative bleeding complication to a great extent. The proteinase inhibit...The deficiency of platelet function is the main defect of hemostatic mechanism during cardiopulmonary bypass (CPB), which attributed to the postoperative bleeding complication to a great extent. The proteinase inhibitor aprotinin was reported to have preserving effect on platelet adhesion during CPB. In this clinical reserch we found that CPB caused plasma alpha 2-antiplasmin decreasing, indicating the fibrinolytic system activation. Meanwhile, the ristocetin-induced aggregation declined to 39.6% and platelet GPIb decreased to 50% of preoperative value. However, by treatment with aprotinin, the plasma alpha 2-antiplasmin during CPB did not change, platelet aggregation was improved and platelet GPIb was preserved, and consequently resulted in a 46% lower blood loss postoperatively. These results confirmed that aprotinin could inhibit the fibrinolysis during CPB, and thus relieve the platelet damage and improve the postoperative hemostatic mechanism.展开更多
文摘Objective: To observe the effect of Xiaoyu Zhixue tablet (消瘀止血片,XYZXT) on the expression of platelet membrane glycoproteins in patients with hemorrhagic thrombopathy, and to explore its possible mechanism. Methods: The total of 148 patients with hemorrhagic thrombopathy were randomly divided into two groups, the traditional Chinese medicicne (TCM) group (n=98) treated with XYZXT and the Western medicine (WM) group (n=50) treated with adrenosin, vitamins C, K and P, both for 6 months. The therapeutic effect and the recovery rate of platelet aggregation in the two groups were observed. And platelet membrane glycoprotein (GP) Ⅰb/Ⅸ, GPⅡb/Ⅲa complexes, GPⅠb, GPⅡb, GP Ⅲa and P-selectin were analyzed by flow cytometry in both groups before and after treatment and also in 34 normal healthy subjects. Results: The total effective rate of hemostasis was 89. 8% in TCM group and 54. 0% in the WM group (x2=45.83, P<0.01), and the recovery rate of platelet aggregation was 72.4% and 4.0% respectively (x2=62.06, P<0.01). The fluorescence intensity of GP Ⅰ b/Ⅸ, GPⅡb/Ⅲa complexes, GPⅠb, GPⅢa and P-selectin were lower in both groups before treatment than those in the healthy subjects. Expression of above-mentioned marks was elevated in TCM group after 6 months' therapy, which was insignificantly different as compared with the healthy subjects (P>0.05) and higher than those in the WM group (P<0.05). Conclusion: One of the mechanisms in treating hemorrhagic thrombopathy with XYZXT is that it could regulate the expression of GP Ⅰb/Ⅸ, GPⅡ b/Ⅲa complexes, GPⅠb, GPⅢa and P-selectin at the level of receptor protein.
基金supported by a grant from the National Natural Science Foundation of China (No. 30572441).
文摘To investigate the role of platelet membrane glycoprotein （GP） Ib/Ⅸ/Ⅴ complex and its subunit GP Ibα in patients with hemorrhagic thrombopathy （HT）, the expressions of GP Ib/Ⅸ/Ⅴ complex and GP Ibα,defined as mean fluorescence intensity （MFI）, were assessed by flow cytometry. The maximum aggregation of platelet was determined by turbidity method. These indicators were compared among 68 HT patients with the presenting complaint of hemorrhage, 33 well-controlled HT patients and 32 normal healthy subjects. The results showed that the MFI of GP Ib/Ⅸ /Ⅴ complex and GP Ibα was markedly lower in HT patients with current hemorrhage than that in the healthy subjects, with difference being statistically significant （P〈0.05）. There was no significant difference in the expressions of GP Ib/ Ⅸ/ Ⅴ complex and GP Ibα between well-controlled HT patients and normal healthy subjects （P〉0.05）. It was concluded that the expression of GP Ib/Ⅸ /Ⅴ complex, the receptor of thrombin and von Willebrand factor, was down-regulated in HT patients with current hemorrhage, which might result in the dysfunction of platelet aggregation and recurrence of HT.
文摘To explore the correlation between the C807T polymorphism of platelet membrane glycoprotein Ⅰa （GP Ⅰa） gene and aspirin resistance in Chinese people, 200 patients with high-risk of atherosclerosis took aspirin （100 mg/d） for 7 days. Platelet aggregation function was detected using adenosine diphosphate （ADP） and arachidonic acid （AA） before and after the administration of aspirin. Then the subjects were divided into three groups according to the results of platelet aggregation function： an aspirin resistant （AR） group, an aspirin semi-responder （ASR） group and an aspirin-sensitive （AS） group. Platelet GP Ⅰa gene 807CT polymorphism was examined by means of polymerase chain reaction-sequence specific primers （PCR-SSP）. The results showed that T allelic frequency in AR group and ASR group were higher that of AS group （P〈0.005）, and the prevalence of genotypes （TT＋TC） of these two groups was significantly higher than that in AS group （P〈0.05）. Platelet GP Ⅰa T allele was significantly associated with aspirin resistance as revealed by multiple logistic regression （OR=3.76, 95% CI： 2.87-9.58）. The results suggest that inherited platelet GP Ⅰa variations may have an important impact on aspirin resistance and the presence of GP Ⅰa T allele may be a marker of genetic susceptibility to aspirin resistance.
文摘The redistribution of platelet membrane glycoprotein IV (GPIV) and the release of intracellular Q-granule thrombospondin (TSP) were examined and the inhibition of 5-thromboglobulin (&TG) and platelet factor 4 (PF4) in patients with chronic myelogenous leukemia (CML) was observed and quantitation of β-TG and PF4 in sera was conducted. GPIV in inactive platelet from CML was 36080±17010 molecules/platelet as compared with 13190±4810 from the controls (P<0,01), No abnormality was found in the distribution of platelet membrane GPIb and GPIIb/III.(P>0. 05). The GPIV redistribution on active platelet membrane induced thrombin (1U/ml) from CML and healthy donors was 44320132310 and 228001 12700 molecules/platelet respectively (P<0. 01 ). The difference in the release of intracellular Q-granule TSP between CML and the control group was not found (P>0.05). There was no direct correlation between GPIV expression and TSP binding after platelet activation. The high leveIs of β-TG and PF4 in sera inhibited release of intracellular a-granule TSP in vitro. These results indicate that the abnormality of platelet membrane GPIV is a common marker in CML, therefore the specific increase of platelet GPIV in patients with CML may be a useful tool for the diagnosis and monitoring of the platelet dysfunction. The release of interna1 TSP pools is hindered by either β-TG or PF4 in sera.
文摘Objective: To investigate the effect of dauricine on the irreversible platelet aggregability of patients with mitral stenosis (MS).Methods: Glycoprotein Ⅳ (GPⅣ ) and thrombospondin (TSP) levels on the membrane surface of the stationary platelet or platelet activated by thrombin (0. 05 U/ml, 0. 1 U/ml,0. 5 U/ml, 1. 0 U/ml) in 16 patients with MS were measured with flow cytometric method and compared with those of the healthy (14 subjects). Results: The GPⅣ level of stationary platelet, the GPⅣ and TSP level of activated platelet in MS patients were higher than those in the healthy significantly (P < 0. 01,< 0. 05, < 0. 005 ), while the TSP level of stationary platelet in the patients was not different to the healthy (P > 0. 05). The GPⅣ redistribution on the activated platelet surface was apparently inhibited by dauricine (50 μmol/L, P < 0. 05 - 0. 005) and the release of TSP from intracellular α-granules was inhibited by dauricine only in the activated platelets induced by thrombin of low concentration (0. 05 U/ml and 0. 1 U/ml, P < 0. 05 - 0. 01 ), inhibiting effect was not found in those activated with high concentration of thrombin. Conclusion: The activity and reactivity to thrombin of platelets increased in MS patients, and dauricine was able to reduce the occurrence of the irreversible platelet aggregation in MS patients.Original article on CJIM(Chin) 1998; 18(8): 461
基金the National Natural Science Foundation of China(No.30572441)
文摘Objective： To investigate the effect of Xiaoyu Zhixue Tablet （消瘀止血片, XYZXT） on the expression of platelet membrane glycoprotein （GP） Ⅰ b/Ⅸ/Ⅴ complex and GP Ⅰ b α in patients with chronic renal failure （CRF） in early metaphase. Methods： Fifty-one patients with CRF in early metaphase （treated group） were treated with XYZXT, 3 months as the course of treatment for 2 courses. The previous therapies remained unchanged. Flow cytometry was used to assess the expression of platelet GP Ⅰb/Ⅸ/Ⅴ complex and GP Ⅰb α in patients with CRF, and turbidity method was used to determine the platelet maximum aggregation rate （MAR）, meanwhile the renal function was measured. The final data were compared with those before the treatment, and with those in the normal control group （31 healthy subjects）. Results： Compared with the normal control group, expressions of GP Ⅰ b/Ⅸ/Ⅴ complex and GPⅠb α, and platelet MAR in CRF patients were significantly lower （P=0.007,P=0.001,P=0.009） before the treatment; after the treatment with XYZXT, the above indexes in CRF patients were remarkably increased （P=0.033,P=0.026, P=0.045）, but still lower than those in the normal control group, however, it was not statistically significant. Conclusion： （1） The expression of GP Ⅰ b/Ⅸ/Ⅴ complex in CRF patients of early metaphase was decreased, which lead to platelet aggregation dysfunction. This might be one of the reasons for the hemorrhagic trend in CRF. （2） XYZXT was able to upgrade expressions of GP Ⅰb/Ⅸ/Ⅴ complex and GPⅠb α in CRF patients, improve platelet function and clown-regulate platelet activation in patients with CRF.
文摘OBJECTIVE: To explore platelet activation and the protective effect of aprotinin in patients with hepatolithiasis. METHODS: The count of plaletets and levels of CD_(62P) and CD_(63) were measured by flow cytometry in 38 patients with hepatolithiasis. Several measurements were carried out after treatment with aprotinin. RESULTS: The levels of CD_(62P), CD_(63) in patients with hepalolithiasis were higher than those in patients with cholecystolithiasis (P<0.05), but the count of platelets was lower (P<0.05). After operation, the levels of CD_(62P), CD_(63) were significantly increased in patients with hepatolithiasis, but the count of platelets was lower (P<0.05). Postoperative levels of CD_(62P), CD_(63) were significantly lower in patients treated with aprotinin than in normal controls (P<0.05); but there was no significant change in the count of platelets in the two groups. CONCLUSION: Platelet activation occurs in patients with hepatolithiasis, and may be inhibited by aprotinin.
文摘The platelet membrane glycoprotein (GP)Ⅱ b/Ⅲ a, GPIX were detected by immunogold assay and flow cytometry, respectively, in two cases of Glannzmann's thrombasthenia (GT). The immunogold assay showed that the GPⅡ b/Ⅲ a gold granules in GT were decreased obviously, compared with that in normal controls. Flow cytometry results showed that GPⅡ b/Ⅲ a in two cases of GT was 0.1 % and 0.5 % of normal control, respectively. While GPIX showed no difference between the GT and normal control. The patients' father showed no bleeding symptoms, whose GPⅡ b/Ⅲ a accounted for 36.99 % of normal control. The experiment results suggested that flow cytometry is a quick, simple and sensitive method for the diagnosis of GP disorders.
文摘The deficiency of platelet function is the main defect of hemostatic mechanism during cardiopulmonary bypass (CPB), which attributed to the postoperative bleeding complication to a great extent. The proteinase inhibitor aprotinin was reported to have preserving effect on platelet adhesion during CPB. In this clinical reserch we found that CPB caused plasma alpha 2-antiplasmin decreasing, indicating the fibrinolytic system activation. Meanwhile, the ristocetin-induced aggregation declined to 39.6% and platelet GPIb decreased to 50% of preoperative value. However, by treatment with aprotinin, the plasma alpha 2-antiplasmin during CPB did not change, platelet aggregation was improved and platelet GPIb was preserved, and consequently resulted in a 46% lower blood loss postoperatively. These results confirmed that aprotinin could inhibit the fibrinolysis during CPB, and thus relieve the platelet damage and improve the postoperative hemostatic mechanism.
