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目的:研究骨髓增殖性肿瘤(MPN)患者JAK2V617F突变发生率及其与临床特征的关系。方法:102例MPN患者采用等位基因特异性PCR(AS-PCR)方法检测JAK2V617F突变情况,突变阳性患者用聚合酶链反应-限制性片段长度多态性分析(PCR-RFLP)分为纯合突变和杂合突变;回顾性分析102例MPN患者临床特征。结果:102例MPN患者中71例(69.6%)存在JAK2V617F突变,包括34/41例真性红细胞增多症PV(82.9%),25/41例ET(61.0%),11/18例PMF(61.1%)和1/2例CNL(50.0%)患者。其中T/T纯合突变12例(PV 9例、ET 1例、PMF 2例),其余均为T/G杂合突变。纯合突变的PV患者初诊时的白细胞计数(平均22.2×109/L)显著高于杂合突变者(14.8×109/L)。突变阳性的PV患者初诊时的白细胞计数(平均16.7×109/L)和血小板计数(平均446.7×109/L)显著高于突变阴性的PV患者(白细胞和血小板平均计数分别为8.0×109/L和270.0×109/L)。ET患者中,突变阳性者初诊时的血红蛋白值(平均144.3g/L)和白细胞计数(平均14.6×109/L)显著高于突变阴性者(124.9g/L和11.7×109/L),而且,突变阳性者有较高的并发症(血栓、出血、骨髓纤维化、转为白血病)发生率。PMF患者中,突变阳性者初诊时的白细胞计数(平均12.3×109/L)显著高于突变阴性者(6.3×109/L)。结论:MPN患者JAK2V617F发生率较高,JAK2V617F阳性MPN患者初诊时的血细胞计数高于阴性患者。突变阳性的ET患者预后更差。 相似文献
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目的 研究BCR/ABL阴性骨髓增殖性肿瘤 (myeloproliterative neoplasms,MPN)患者血栓栓塞的相关危险因素,用以指导临床。方法 104例MPN患者采用等位基因特异性PCR(AS-PCR)方法检测JAK2V617F突变情况, 回顾性分析104 例MPN 患者临床特征、实验室检查及血栓栓塞事件发生情况等资料。先后行单因素分析和多因素分析。结果 104例MPN患者中71例(68.3%)存在JAK2V617F突变,45例有血栓栓塞(43.3%)。单因素分析表明,年龄、高血压病史、病种、JAK2V617F、白细胞计数(WBC)与血栓栓塞具有相关性(P<0.05);多因素分析表明,年龄(≥60岁)、JAK2V617F突变、白细胞计数升高是血栓栓塞的独立危险因素(P<0.05)。结论 高龄、JAK2V617F突变阳性或白细胞计数增高的MPN患者血栓栓塞风险可能较高。 相似文献
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目的:探讨亚砷酸(arsenic trioxide,ATO)在治疗JAK2V617F突变阳性的骨髓增殖性疾病(myelopro-liferative neoplasm,MPN)中的作用。方法:选取20例JAK2V617F阳性的MPN患者用亚砷酸治疗,观察其治疗前后不同时期相应的血象变化以及JAK2V617F表达,并与单用羟基脲的对照组作比较。结果:与对照组相比,3个月及1年后,应用亚砷酸治疗组的红细胞、血红蛋白、血小板、白细胞均明显降低(P<0.01);治疗3年后两组上述指标无明显差异(P>0.05);JAK2V617F的转阴率两组无明显差异性(P>0.05)。结论:亚砷酸作为一种诱导凋亡剂短期内可以有效地降低三系血细胞,但未有证据表明能降低MPN患者JAK2V617F的阳性表达,故长期疗效需更多的临床及实验观察。 相似文献
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结合大量的临床实践和近10年来对骨髓增殖性肿瘤(MPN)[骨髓增殖性疾病(MPD)]在JAK2 V617F基因突变等分子水平的大量研究,更加深了对MPN(MPD)的分子发病机制和临床价值的认识.研究者们探讨了JAK2 V617F基因突变如何促进MPN(MPD)发病的机制,分析了JAK2 V617F基因突变的分子机制和JAK2 V617F基因突变如何引起MPN(MPD)不同临床表型,以及MPN(MPD)基因组突变图谱及其生物学意义,指出了MPN(MPD)病理克隆的复杂性.JAK2 V617F基因突变在研究和诊治MPN(MPD)的过程中发挥着重大作用,其促使MPN(MPD)的研究和应用深入到基因/分子水平,治疗更趋于靶向性,更加精确,特别是使那些常规检验无法明确诊断的患者获得了及时诊治,避免了合并疾病的发生.MPN(MPD)的防治焦点是及时诊治,预防并避免血栓/出血性并发症的发生.推荐首选干扰素α(IFN-α)治疗,对于年龄大于60岁的患者,羟基脲是可以采用的.MPN(MPD)患者的预后大多数良好,发生恶变的风险不高,这是反复建议对中国MPD患者避免使用MPN称谓的主要理由. 相似文献
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慢性骨髓增殖性肿瘤(myeloproliferative neo-plasms,MPN)是造血多能干细胞克隆性增殖所引起的一组疾病的统称,常表现为血细胞的质量和数量异常,同时伴有脾大、血栓形成、出血倾向等临床表现[1-2].MPN 可根据费城染色体(Philadelphia chro-mosome,Ph)的表达分为Ph... 相似文献
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简要回顾了近百余年人们对骨髓增殖性肿瘤(MPN)的认识过程,重点讨论这一类疾病的诊断与治疗.JAK2 V617F基因突变的发现将费城染色体阴性(Ph-)MPN带入分子生物学时代,为临床提供了重要的诊断手段和依据,指导、研发了芦可替尼(ruxolitinib)等一批靶向药物.但是,与慢性粒细胞白血病(CML)中的bcr-abl不同,JAK2 V617F突变不是MPN诊断的“金标准”,其他辅助检查和鉴别诊断仍不可少.目前,JAK抑制剂开始用于Ph-MPN患者,有一定的适应证,远期疗效正在观察,目前还不能替代有效的常规治疗,如羟基脲、阿司匹林等. 相似文献
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目的 探讨MPL exon10突变在JAK2 V617F阴性骨髓增殖性肿瘤(MPN)中的发生情况。方法 对235例MPN患者进行JAK2 V617F检测,对检出的103例阴性患者应用等位基因特异性聚合酶链反应(ASP-PCR)联合测序检测MPL exon10已知基因突变MPLW515K/L;应用DNA单链构象多态性聚合酶链反应(SSCP-PCR)联合测序检测MPL exon10未知突变。结果 103例JAK2 V617F阴性MPN 患者中MPLW515K/L检出1例MPLW515K(TGG→AAG),为原发性骨髓纤维化(PMF)患者;MPL exon10未知突变检测发现1例原发性血小板增多症(ET)患者存在新的突变类型,即MPL核苷酸1491-1492位之间插入12个碱基(CTGGTGATCGCT),且为纯合突变。结论 JAK2 V617F阴性MPN患者在MPL 基因exon10区域内除已知W515K/L突变外尚存在新的突变位点,但突变率较低。 相似文献
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目的探讨JAK2 V617F基因突变状态及负荷对BCR-ABL阴性骨髓增殖性肿瘤(MPN)的影响。方法回顾性分析2015年9月至2020年1月河北省沧州市中心医院199例MPN患者的临床资料。分析JAK2 V617F突变负荷与MPN患者临床病理特征及预后评分的关系。结果199例BCR-ABL阴性MPN患者中JAK2 V617F突变阳性138例(69.4%);其中,72例真性红细胞增多症(PV)患者中突变阳性64例(88.9%),101例原发性血小板增多症(ET)患者中突变阳性54例(53.5%),25例骨髓纤维化(MF)患者中突变阳性20例(80.0%),1例嗜酸粒细胞增多症(HES)患者突变阳性。JAK2 V617F突变高负荷者占55.1%(76/138)。突变负荷最高的类型为PV,MF次之,ET最低,3组突变负荷分别为(73.9±18.3)%、(59.9±25.2)%、(25.0±16.5)%。JAK2 V617F突变负荷与PV、ET、MF患者的白细胞计数均呈正相关(r值分别为0.626、0.675、0.796,均P<0.01)。JAK2 V617F突变负荷与PV、ET患者的预后评分均呈正相关(r值分别为0.296、0.404,均P<0.05)。结论BCR-ABL阴性MPN患者JAK2 V617F突变负荷与临床病理因素相关,JAK2 V617F突变高负荷患者预后不良。 相似文献
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患者 女性,38岁,2013年4月体检时发现脾大,门诊以脾大原因待查收入院.入院查体:脾脏肋缘下可触及,甲乙线6 cm,甲丙线10 cm,丁戊线0 cm,肝脏肋缘下未触及.腹部CT示:门静脉栓塞,脾大.腹部B型超声示:脾大,脾静脉稍增宽,门静脉血栓(门静脉主干管腔狭窄率约58%),下腔静脉肝段未见狭窄.胃镜示:胃底静脉曲张,十二指肠球部多发溃疡.血常规:白细胞计数9.71×10^9/L,中性粒细胞绝对值6.82×109/L,单核细胞绝对值0.38×10^9/L,嗜酸性粒细胞绝对值0.2×10^9/L,红细胞计数4.5×10^12/L,血红蛋白154 g/L,血小板计数208×109/L.乙型肝炎五项检查阴性.肝功能正常。 相似文献
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目的 探讨JAK2 V617F基因突变与血管栓塞性疾病的相关性,为临床诊治和预防栓塞提供依据.方法 以首都医科大学宣武医院神经内科、心脏科及血管外科收治的血红蛋白> 160g/L、血小板计数> 300×109/L的56例患者为研究对象,其中骨髓增殖性肿瘤患者47例.回顾性分析患者血管栓塞情况、JAK2 V617F突变情况及两者之间的相关性.结果 JAK2 V617F基因突变阳性率为37.50%(21/56),血管栓塞发生率为41.07%(23/56),两者之间存在关联性(P=0.014).结论 JAK2 V617F基因突变检测有助于骨髓增殖性肿瘤患者的早期诊断和治疗,减少栓塞并发症,提高患者生命质量. 相似文献
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Ivana Horvat Ana Boban Renata Zadro Margareta Radic Antolic Ranka Serventi-Seiwerth Pavle Roncevic Ivo Radman Dubravka Sertic Marijo Vodanovic Drazen Pulanic Sandra Basic-Kinda Nadira Durakovic Silva Zupancic-Salek Radovan Vrhovac Igor Aurer Damir Nemet Boris Labar 《Clinical Lymphoma, Myeloma & Leukemia》2019,19(1):53-63
Introduction
Thrombosis is the most common complication in Philadelphia chromosome negative (Ph?) myeloproliferative neoplasms patients.Patients and Methods
In a cohort of 258 Ph? myeloproliferative neoplasm patients, the difference between patients with and without thrombosis was analyzed according to genetic thrombophilia factors, JAK2 V617F status and burden allele, blood count, cardiovascular risk factors and age. Patients were also divided in polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF) subgroups as well as by the type of thrombosis.Results
Analysis of cardiovascular risk factors regarding arterial thrombosis showed that PV patients with thrombosis had higher incidence of diabetes (P = .030), ET patients more often had hypertension (P = .003) and hyperlipidemia (P = .005), while PMF patients had hyperlipidemia (P = .046) and at least one cardiovascular risk factor (P = .044). Moreover, leukocytes > 18 × 109/L and V617F burden allele > 25.7% were statistically significantly different in PV patients (P = .019 and borderline significant at P = .055, respectively), while in ET patients leukocytes > 9.2 × 109/L (P < .001) and age at diagnosis of > 55 years were statistically significantly different (P = .002). PMF patients with V617F burden allele ≤ 34.8% were more prone to thrombosis (P = .032). When comparing patients with and without venous thrombosis, cutoff value of V617F burden allele > 90.4% was significant for PV patients with thrombosis (P = .036), as was > 56.7% for PMF patients with thrombosis (P = .046). Platelets ≤ 536 × 109/L and age at diagnosis > 54 years showed statistically significant difference for ET patients with thrombosis (P = .015 and P = .041, respectively).Conclusion
On the basis of our results, a new scoring system for thrombosis risk in PV could be made, while PMF prognostic model may be expanded for better recognition of potential thrombotic risk factors. 相似文献14.
摘要:目的:研究我区骨髓增殖性肿瘤(MPN)中JAK2V617F基因突变与疾病临床特征的相关性。方法:回顾性分析我区134例MPN患者JAK2V617F基因突变与患者性别、年龄、民族、外周血白细胞、血小板计数、血红蛋白、血清乳酸脱氢酶(LDH)水平及是否合并血栓、出血及心血管疾病并发症等临床特征的相关性进行统计分析。结果:134例MPN患者中PV 51例,ET 66例,IMF17例,存在JAK2V617F突变98例(73.1%)。年龄60岁以上者发生突变率较60岁以下者明显增高(p<0.05),MPD患者中JAK2V617F突变阳性者外周血白细胞计数、血红蛋白水平与血栓、心血管疾病的发生率均高于突变阴性者(p<0.05),而性别、民族、血小板计数及LDH水平在JAK2V617F基因突变阳性与阴性患者间无显著性差异(p>0.05)。结论:MPN患者JAK2V617F基因突变与MPN患者年龄、外周血白细胞计数、血红蛋白水平、血栓及心血管疾病并发症相关。 相似文献
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《Clinical Lymphoma, Myeloma & Leukemia》2019,19(8):e425-e429
BackgroundIdentification of janus kinase 2 (JAK2) mutation even in absence of myeloproliferative disorders (MPNs) was found to be related to venous thromboembolism occurrence. Venous thrombosis screening is not routinely requested in patients with myeloproliferative neoplasms unless the patient is symptomatic. It has been reported that the incidence of thrombosis in elderly patients is much higher than in young patients. The aim of this work was to screen MPN patients for venous thrombosis and study its correlation with JAK2 allele burden and with MPN 10 score.Patients and MethodsWe enrolled 73 patients with JAK2-positive MPN from our Hematology Clinic in the period August 2015 to Feb 2017. All patients had been screened for thrombosis in the venous system in lower limbs (LLs), upper limbs, portal, and mesenteric systems using color Doppler ultrasound imaging.ResultsFifty-three (72.6%) patients were younger than 60 years. Twenty-two (30%) had essential thrombocytosis, 35 (47.9%) had polycythemia rubra vera, and 16 (22%) had idiopathic myelofibrosis. Twenty-seven venous thrombotic attacks were reported in 22 (30.1%) patients. Five (6.8%) had thrombosis in 2 sites. Seventeen (23%) had superior mesenteric and portal vein thrombosis. Six (8%) had iliofemoral (8%) and 4 (5%) had combined LL and portal thrombosis. Eight (10.8%) had active thrombosis at screening. Only 3 patients (4%) were symptomatic with abdominal pain during screening. Pruritis (P = .02) and abdominal pain (P = .039) were significantly different between cases with and without thrombosis. There was no significant difference in MPN 10 score between cases with active or previous thrombosis.ConclusionWe recommend routine screening for venous thrombosis in any case of MPN when diagnosed and screening for MPNs in any patient with venous thrombosis especially of the portal vein or atypical sites. If MPN patients present with increasing pruritus or abdominal pain, they also should be screened for venous thrombosis. Further research on a large scale in MPN age groups younger than 60 years regarding pathogenesis of thrombosis is highly recommended. 相似文献