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Blood:砷剂联合甘露醇治疗急性早幼粒细胞白血病CNS复发

2014-07-08 KellyDu 肿瘤新青年论坛

背景: 3-5%的APL(急性早幼粒细胞白血病)患者会出现髓外复发,最常见部位在CNS。其表现在MRI通常正常,需脑脊液(CSF)检查诊断。尽管ATO联合全反式维甲酸(ATRA)已被列为APL一线化疗方案,但它们均为水溶性分子,较难通过血脑屏障,在CSF中难以达到治疗浓度。正常口服给药情况下,CSF中ATO浓度仅为血浆中的17.7%。作者前期在兔模型中的研究显示ATO联合甘露醇静脉输注可使血脑屏

MedSci临床研究解读:

MedSci临床研究解读课程上线啦,看看这篇研究有哪些地方值得学习,还有哪些内容值得深入挖掘。请点击下方视频链接,观看MedSci学术对此文章的点评 。

视频地址:MedSci临床研究解读系列课程四




研究内容阅读:

3-5%的APL(急性早幼粒细胞白血病)患者会出现髓外复发,最常见部位在CNS。其表现在MRI通常正常,需脑脊液(CSF)检查诊断。尽管ATO联合全反式维甲酸(ATRA)已被列为APL一线化疗方案,但它们均为水溶性分子,较难通过血脑屏障,在CSF中难以达到治疗浓度。正常口服给药情况下,CSF中ATO浓度仅为血浆中的17.7%。作者前期在兔模型中的研究显示ATO联合甘露醇静脉输注可使血脑屏障通透性短暂增加;且在体外实验中确定了ATO对CNS的安全浓度和治疗浓度。该文依托既往研究基础,采用了ATO联合甘露醇的新方案进行诱©导巩固维持支持。

内容概述:

患者:

共纳入随访了17名确诊APL CNS复发患者,中位年龄41岁,CSF中早幼粒细胞均高达69-85%,PML/RARa拷贝均可检测到。

治疗方案:

临床疗效:16/17例诱导治疗18-32天(中位 24天)后CSF中原始细胞消失,且在第一次巩固化疗后达CMR(完全分子生物学反应)。诱导过程未观察到严重副作用,部分轻度肝酶升高但治疗后好转。9例在随访中(中位92月)持续CMR,RFS为52.9%。另外7例再次复发后经ATO+甘露醇重新诱导后仍有效,其中5例再次达到CMR且无复发,2例死亡。至随访终点,共14/17例存活,中位OS为87月(66-125月)。

整个诱导治疗过程中,CSF和血中砷浓度基本稳定且显著相关,CSF中浓度约为血中的99.7%。

小编评价:

对APL CNS复发,当前广泛采用的是鞘内注射(MTX、Ara-C、激素)联合化疗诱导和巩固,后行自体或异体造血干细胞移植,但以上治疗副作用较大,使其应用受限。另外,静脉ATO联合口服ATRA也是APL 复发时重要选择,但其相关副作用仍不可忽视,如分化综合症以及心脏毒性。

该文是from bench to bed的一个极好案例。作者为哈医大一院院长、血液内科主任周晋,作者对该方案的前期研究基础应该也是能让blood评审们信服的重要原因。ATO+甘露醇联合治疗的理论基础在于甘露醇能帮助ATO克服血脑屏障进入颅内,且通过缓慢静脉注射能使CSF中砷剂浓度维持在稳定水平,与外周血的治疗浓度接近。

该新方案在疗效上显著,在毒副作用上较既往方案也凸显了优势。研究中未出现砷剂诱导中常见的白细胞增多、分化综合症等副作用。且在砷剂的长期维持中,也未出现严重慢性毒性作用,如心血管病变,糖尿病,神经病变及二次肿瘤等。

总之,这是一个新治疗方案的有效性及可行性研究,思路和行文上中规中矩,但能独创性地提出治疗方案的创新,并且有10余年的研究工作的积累,有理有据,可谓是厚积薄发。谁说中国人只会拿来主义,哼!

原始出处:

Wang H1, Cao F2, Li J1, Li L1, Li Y3, Shi C1, Lan W1, Li D1, Zhao H1, Zhang Y1, Zhang Z1, Liu X1, Meng R1, Yang B1, Zhou J4. Arsenic trioxide andmannitol for the treatment of acute promyelocytic leukemia relapse in centralnervous system. Blood. 2014 Jun 24. pii: blood-2014-04-568121.

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    2015-03-07 lg.zhao
  2. [GetPortalCommentsPageByObjectIdResponse(id=1914222, encodeId=f86f1914222d6, content=<a href='/topic/show?id=4b8349356f' target=_blank style='color:#2F92EE;'>#CNS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=91, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4935, encryptionId=4b8349356f, topicName=CNS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c737344, createdName=lg.zhao, createdTime=Sat Mar 07 13:32:00 CST 2015, time=2015-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=12297, encodeId=825e1229e9e, content=非常不错,工作做得很细致, beContent=null, objectType=article, channel=null, level=null, likeNumber=221, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=810d40991, createdName=thm761023, createdTime=Tue Oct 21 20:27:00 CST 2014, time=2014-10-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=11013, encodeId=50161101312, content=from bench to bed,从临床中来,到临床中去,中间有基础研究支持,非常棒的科研。, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160403/IMG5700F9EC14BED9452.jpg, createdBy=879d37419, createdName=cjyisheng, createdTime=Sat Aug 09 21:15:00 CST 2014, time=2014-08-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=10510, encodeId=317410510c3, content=学习了!很受启发!, beContent=null, objectType=article, channel=null, level=null, likeNumber=195, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=431f37155, createdName=lvjinglong, createdTime=Wed Jul 16 22:11:00 CST 2014, time=2014-07-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1295668, encodeId=a464129566830, content=<a href='/topic/show?id=e02468846d4' target=_blank style='color:#2F92EE;'>#甘露醇#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=68846, encryptionId=e02468846d4, topicName=甘露醇)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f73a255, createdName=medscijoin, createdTime=Thu Jul 10 05:32:00 CST 2014, time=2014-07-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1423750, encodeId=767b1423e505b, content=<a href='/topic/show?id=52cb52309d9' target=_blank style='color:#2F92EE;'>#急性早幼粒细胞白血病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=52309, encryptionId=52cb52309d9, topicName=急性早幼粒细胞白血病)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2ac03837582, createdName=ycmayy, createdTime=Thu Jul 10 05:32:00 CST 2014, time=2014-07-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1576021, encodeId=e3b315e6021f3, content=<a href='/topic/show?id=7c71e349702' target=_blank style='color:#2F92EE;'>#砷剂#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73497, encryptionId=7c71e349702, topicName=砷剂)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3f7116278795, createdName=ms622625817193301, createdTime=Thu Jul 10 05:32:00 CST 2014, time=2014-07-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1595956, encodeId=368a159595683, content=<a href='/topic/show?id=07bfe3495f1' target=_blank style='color:#2F92EE;'>#砷#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73495, encryptionId=07bfe3495f1, topicName=砷)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=863418313756, createdName=lishizhe, createdTime=Thu Jul 10 05:32:00 CST 2014, time=2014-07-10, status=1, ipAttribution=)]
    2014-10-21 thm761023

    非常不错,工作做得很细致

    0

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    2014-08-09 cjyisheng

    from bench to bed,从临床中来,到临床中去,中间有基础研究支持,非常棒的科研。

    0

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    2014-07-16 lvjinglong

    学习了!很受启发!

    0

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    2014-07-10 lishizhe

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NEJM:急性早幼粒细胞白血病(APL)砷剂耐药的基因突变机制

近日,北京大学血液病研究所黄晓军课题组研究发现急性早幼粒细胞白血病(APL)砷剂耐药的新机制。该研究结果今日以通讯的形式发表在国际医学顶级杂志 New England Journal of Medicine(新英格兰医学杂志),影响因子51.658。这是北京大学人民医院历史上首次在该杂志上发表文章,具有重要的历史意义。      此项研究在13例砷剂耐药病例中,

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