We report the first case of a patient with hepatitis C virus(HCV) infection and idiopathic thrombocytopenic purpura(ITP), who later developed acquired amegakaryocytic thrombocytopenia(AAMT), with autoantibodies to the...We report the first case of a patient with hepatitis C virus(HCV) infection and idiopathic thrombocytopenic purpura(ITP), who later developed acquired amegakaryocytic thrombocytopenia(AAMT), with autoantibodies to the thrombopoietin(TPO) receptor(c-Mpl). A 64-year-old woman, with chronic hepatitis C, developed severe thrombocytopenia and was diagnosed with ITP. She died of liver failure. Autopsy revealed cirrhosis and liver carcinoma. In the bone marrow, a marked reduction in the number of megakaryocytes was observed, while other cell lineages were preserved. Therefore, she was diagnosed with AAMT. Additionally, autoantibodies to c-Mpl were detected in her serum. Autoantibodies to c-Mpl are one of the causes of AAMT, acting through inhibition of TPO function, megakaryocytic maturation, and platelet formation. HCV infection induces several autoantibodies. HCV infection might also induce autoantibodies to c-Mpl, resulting in the development of AAMT. This mechanism may be one of the causes of thrombocytopenia in patients with HCV infection.展开更多
Objective:To study the regulation of trombinol on thrombopoietin,an essential regulator of thrombocyte production.Methods:Effect of trombinol on thrombopoietin regulation was evaluated at the m RNA and protein levels ...Objective:To study the regulation of trombinol on thrombopoietin,an essential regulator of thrombocyte production.Methods:Effect of trombinol on thrombopoietin regulation was evaluated at the m RNA and protein levels in human hepatoma Hep G2 cells.The m RNA expressions were revealed by PCR and real-time PCR,while the protein expressions were analyzed using western blotting and human ELISA kit.Statistical differences between the test were determined by student's t-test with P < 0.05 was considered statistically significant.Results:Trombinol significantly increased the expression of thrombopoietin at the level of m RNA and protein secretion in Hep G2 cell lines.Trombinol with the concentration of15 mg/m L,positively induces 2.5-fold of thrombopoietin expression.Up-regulation of GABP,a transcription factor of thrombopoietin,is suggested to be involved in cellular regulatory mechanisms of trombinol.Here,our result shows convincing evidence that trombinol affects the thrombopoietin productions in vitro.This molecular explanation of thrombopoietin's stimulating function is in line with the traditional use of Psidium guajava for treatment of diseases involving thrombocytopenia.Conclusions:Thrombopoietin stimulating function of trombinol could be potentially considered as one of alternative treatment for thrombocytopenia-related cases,including post chemotherapy shock,dengue fever and liver failure.展开更多
文摘We report the first case of a patient with hepatitis C virus(HCV) infection and idiopathic thrombocytopenic purpura(ITP), who later developed acquired amegakaryocytic thrombocytopenia(AAMT), with autoantibodies to the thrombopoietin(TPO) receptor(c-Mpl). A 64-year-old woman, with chronic hepatitis C, developed severe thrombocytopenia and was diagnosed with ITP. She died of liver failure. Autopsy revealed cirrhosis and liver carcinoma. In the bone marrow, a marked reduction in the number of megakaryocytes was observed, while other cell lineages were preserved. Therefore, she was diagnosed with AAMT. Additionally, autoantibodies to c-Mpl were detected in her serum. Autoantibodies to c-Mpl are one of the causes of AAMT, acting through inhibition of TPO function, megakaryocytic maturation, and platelet formation. HCV infection induces several autoantibodies. HCV infection might also induce autoantibodies to c-Mpl, resulting in the development of AAMT. This mechanism may be one of the causes of thrombocytopenia in patients with HCV infection.
文摘Objective:To study the regulation of trombinol on thrombopoietin,an essential regulator of thrombocyte production.Methods:Effect of trombinol on thrombopoietin regulation was evaluated at the m RNA and protein levels in human hepatoma Hep G2 cells.The m RNA expressions were revealed by PCR and real-time PCR,while the protein expressions were analyzed using western blotting and human ELISA kit.Statistical differences between the test were determined by student's t-test with P < 0.05 was considered statistically significant.Results:Trombinol significantly increased the expression of thrombopoietin at the level of m RNA and protein secretion in Hep G2 cell lines.Trombinol with the concentration of15 mg/m L,positively induces 2.5-fold of thrombopoietin expression.Up-regulation of GABP,a transcription factor of thrombopoietin,is suggested to be involved in cellular regulatory mechanisms of trombinol.Here,our result shows convincing evidence that trombinol affects the thrombopoietin productions in vitro.This molecular explanation of thrombopoietin's stimulating function is in line with the traditional use of Psidium guajava for treatment of diseases involving thrombocytopenia.Conclusions:Thrombopoietin stimulating function of trombinol could be potentially considered as one of alternative treatment for thrombocytopenia-related cases,including post chemotherapy shock,dengue fever and liver failure.
文摘目的 探讨抗幽门螺旋杆菌(Hp)治疗联合重组人血小板生成素(rhTPO)对难治性特发性血小板减少性紫癜(ITP)患者辅助性T细胞1/辅助性T细胞2(Th1/Th2)细胞因子的影响。方法 选择2008年6月至2018年6月收治的71例难治性ITP患者为研究对象进行回顾性研究,按照治疗方案的不同将患者分为对照组(n=36)及观察组(n=35)。对照组给予rhTPO治疗,观察组在对照组治疗的基础上使用抗Hp治疗,两组均连续治疗2周。统计两组患者治疗2周后临床疗效;比较两组患者治疗前与治疗后Th1细胞因子[白细胞介素(IL)-2、γ-干扰素(IFN-γ)、肿瘤坏死因子-α(TNF-α)]和Th2细胞因子(IL-4、IL-10)、B淋巴细胞(CD19^+、B1细胞)与血小板(PLT)计数;比较治疗后1年内两组患者的复发率。结果 治疗2周后,观察组总有效率高于对照组(94.29% vs 69.44%,P<0.01)。治疗2周后,两组IFN-γ、TNF-α、IL-2、IL-2/IL-4、CD19^+、B1水平均较治疗前降低,且观察组低于对照组(P<0.05,P<0.01);IL-4、IL-10、PLT水平均较治疗前升高,且观察组高于对照组(P<0.05,P<0.01)。随访1年内观察组总复发率低于对照组(21.21% vs 48.00%,P<0.05)。结论 抗Hp联合rhTPO治疗难治性ITP患者可显著提高临床疗效,升高PLT,调节Th1/Th2免疫平衡,缓解临床症状,改善预后。
