Blood:再生障碍性贫血患者,进行造血干细胞移植后感染相关的死亡风险与供体的端粒酶长度相关!

2018-04-10 MedSci MedSci原创

中心点:供体端粒酶长可减少重度再生障碍性贫血患者进行造血干细胞移植后感染相关的死亡。摘要:既往研究表明长的供体白细胞端粒长度(TL)与重度再生障碍性贫血(SAA)患者进行造血干细胞移植(HCT)后的存活率提高相关。现Shahinaz M. Gadalla等人对细胞特异性淋巴细胞的TL是否与HCT后特定原因的死亡相关进行探究。通过流式细胞术和原位杂交荧光(flow FISH)对供体总体的淋巴细胞TL

中心点:

供体端粒酶长可减少重度再生障碍性贫血患者进行造血干细胞移植后感染相关的死亡。

摘要:

既往研究表明长的供体白细胞端粒长度(TL)与重度再生障碍性贫血(SAA)患者进行造血干细胞移植(HCT)后的存活率提高相关。现Shahinaz M. Gadalla等人对细胞特异性淋巴细胞的TL是否与HCT后特定原因的死亡相关进行探究。

通过流式细胞术和原位杂交荧光(flow FISH)对供体总体的淋巴细胞TL以及单一淋巴细胞(幼稚T细胞[CD45RA+CD20-]、记忆T细胞[CD45RA-CD20-]、完全分化的NK T细胞[CD45RA+CD57+]和B细胞[CD45RA+CD20+])的TL进行检测。

本研究共纳入1988年-2004年间进行非血缘供体HCT的197位SAA患者。进行HCT时的中位年龄15岁(IQR 0.5-40),中位随访时间5年(1个月-20.7年)。在所有细胞亚组中,较长的供体TL与所有原因死亡风险降低相关(p<0.01)。在特异性死亡原因分析中,B细胞较长的TL(HR=0.63, 95% CI=0.46-0.87, p=0.006)以及全分化的NK T细胞(HR=0.7, 95% CI=0.51-0.97, p=0.03)可能与感染相关的死亡风险降低相关。而在其他检验的淋巴细胞亚型中,供体TL与移植物抗宿主病或移植失败导致的死亡无明显关联(p>0.05)。

综上所述,供体的TL较长可降低SAA患者进行造血干细胞移植后感染相关的死亡风险。

原始出处:

Shahinaz M. Gadalla,et al. Donor Telomere Length and Causes of Death after Unrelated Hematopoietic Cell Transplant in Patients with Marrow Failure. Blood  2018  :blood-2017-10-812735;  doi: https://doi.org/10.1182/blood-2017-10-812735

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    2018-04-12 俅侠
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    2018-04-10 易水河

    学习学习了

    0

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端粒被称为细胞寿命的"有丝分裂钟",端粒、着丝粒和复制原点是染色体保持完整和稳定的三大要素,端粒长度反映细胞复制史及复制潜能。有研究显示,端粒在决定动植物细胞的寿命中起着重要作用,细胞分裂次数越多,其端粒磨损越多,细胞寿命越短。

Oncotarget:端粒酶和聚(ADP-核糖)聚合酶抑制剂联合使用能够限制胰腺癌细胞寿命

胰腺癌是一种恶性程度很高,约90%为起源于腺管上皮的导管腺癌,发病率和死亡率近年来明显上升,胰腺癌的诊断和治疗都比较困难,早期无特异性症状,手术死亡率较高,而治愈率很低。

Science:研究揭秘细胞永生化和癌症形成的“两步”过程!

有助于使细胞不死的突变对肿瘤的发展至关重要,但加利福尼亚大学伯克利分校的新研究表明,成为不朽的过程比原来想象的更为复杂。

EMBO J:新研究有望增强端粒酶抗衰老功能

人们都希望能永葆年轻,细胞中的端粒酶就具有让细胞“不老”的潜力。一项新研究揭示了增强端粒酶抗衰老功能的途径,有望用于治疗先天性角化不良等相关疾病。