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Cancer Cell: IL-15可能是慢性炎症致癌的重要机制

2012-11-16 Guido Marcucci 《癌症细胞》

  近日,刊登在《癌症细胞》期刊上的一项新研究显示,人体制造的一种类似于激素的促进炎症的物质,在处于高水平的时候,可能会导致一种恶性白血病。   虽然,人们知道诸如晒伤等慢性炎症有时候可能导致癌症,但是一直不清楚其背后的机理是什么。美国俄亥俄州立大学综合癌症中心,Arthur G. James癌症医院(OSUCCC-James)和Richard J. So

  近日,刊登在《癌症细胞》期刊上的一项新研究显示,人体制造的一种类似于激素的促进炎症的物质,在处于高水平的时候,可能会导致一种恶性白血病。

  虽然,人们知道诸如晒伤等慢性炎症有时候可能导致癌症,但是一直不清楚其背后的机理是什么。美国俄亥俄州立大学综合癌症中心,Arthur G. James癌症医院(OSUCCC-James)和Richard J. Solove研究所的科研人员发现,高水平的白细胞介素15(IL-15)可以在动物模型中导致大颗粒淋巴细胞(LGL)白血病—— 一种罕见的而且常常致命的癌症。

  通常,人体内释放白细胞介素15能刺激天然“杀手”细胞——破坏癌细胞和被病毒感染细胞的免疫细胞——的发育、生存和增殖。但是,当白细胞介素15在体内长期以高数量存在的时候——诸如在慢性炎症期间——它可能导致大颗粒淋巴细胞的特定免疫细胞变成癌细胞。

  研究人员表示,白细胞介素15与正常的大颗粒淋巴细胞表面上的受体结合时,会提升细胞内部的致癌蛋白质的水平。高致癌蛋白质水平反过来会带来染色体不稳定和额外的基因突变,还会激活一个称为DNA甲基化的过程,这个过程会关闭一批基因,包括通常会抑制肿瘤生长的重要基因。

  与此同时,这组科研人员还开发出了针对这种白血病的疗法。他们研究出了一种蛋白酶体抑制剂硼替佐米的脂质体剂型,它能关闭致癌路径,有可能治愈这种恶性疾病。实验中,接受这种脂质体硼替佐米治疗的白血病小鼠在130天里表现出了100%的存活率,而对照组的动物在60~80天里表现出了100%的死亡率。并且这一疗法在动物模型中没有表现出可辨别的副作用。

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    2013-03-30 wetgdt
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    2012-12-30 维他命
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    2012-11-18 jambiya
  6. [GetPortalCommentsPageByObjectIdResponse(id=2003303, encodeId=3930200330316, content=<a href='/topic/show?id=7fc0963527' target=_blank style='color:#2F92EE;'>#IL-15#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9635, encryptionId=7fc0963527, topicName=IL-15)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1e34303, createdName=wetgdt, createdTime=Sat Mar 30 22:08:00 CST 2013, time=2013-03-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1780594, encodeId=b1341e80594ed, content=<a href='/topic/show?id=517a4016ac' target=_blank style='color:#2F92EE;'>#cancer cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=49, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4016, encryptionId=517a4016ac, topicName=cancer cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=智智灵药, createdTime=Tue Dec 11 22:08:00 CST 2012, time=2012-12-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1868601, encodeId=919718686010d, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Sun Aug 11 20:08:00 CST 2013, time=2013-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1958834, encodeId=a494195883411, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Sun Dec 30 09:08:00 CST 2012, time=2012-12-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1370770, encodeId=942b13e07705f, content=<a href='/topic/show?id=9c39864991e' target=_blank style='color:#2F92EE;'>#致癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86499, encryptionId=9c39864991e, topicName=致癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2c25323, createdName=jambiya, createdTime=Sun Nov 18 06:08:00 CST 2012, time=2012-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1508157, encodeId=29cb150815eed, content=<a href='/topic/show?id=8d4596248e' target=_blank style='color:#2F92EE;'>#IL-1#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9624, encryptionId=8d4596248e, topicName=IL-1)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f6cf9946833, createdName=jjjiang0202, createdTime=Sun Nov 18 06:08:00 CST 2012, time=2012-11-18, status=1, ipAttribution=)]
    2012-11-18 jjjiang0202

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