Oncotarget:阻断PTOV1防止前列腺癌治疗对多西他赛的耐药性

2017-08-19 Emma MedSci原创

去势抵抗性前列腺癌(castration-resistant prostate cancer,CRPC),是经过初次持续性内分泌治疗后疾病依然进展的前列腺癌。

去势抵抗性前列腺癌(castration-resistant prostate cancer,CRPC),是经过初次持续性内分泌治疗后疾病依然进展的前列腺癌,同时具备:(1)血清睾酮达到去势水平(小于50ng/dl或小于1.7nmol/L)(2)间隔一周,连续3次PSA上升,较最低值升高50%以上。可以这么认为,这样的患者一定是接受了内分泌治疗,可以是单纯的抗雄治疗,也可以是单纯的去雄治疗,也可以是联合应用,但一定是持续性内分泌治疗;疾病进展包括症状的出现或加重,也包括PSA的升高等。PTOV1被报道为致癌蛋白,研究提示其与许多肿瘤中较差的存活率显著相关。多西他赛属于紫杉类化合物抗肿瘤药,作用机制是加强微管蛋白聚合作用和抑制微管解聚作用,导致形成稳定的非功能性微管束,因而破坏肿瘤细胞的有丝分裂。

研究人员调查了PTOV1在CRPC多西他赛治疗中的作用。研究结果显示,PTOV1通过上调ABCB1和与多西他赛耐药性和多能性因子相关的基因,增强CRPC细胞在多西他赛下的存活能力。PTOV1是CRPC耐药和自我更新特性的启动子,可将PTOV1,ALDH1A1和CCNG2识别为在原发性前列腺肿瘤中检测到的转移和不良预后的潜在标志物,虽然在额外的模型中需要进一步的验证,但阻断PTOV1可能是防止CRPC对多西他赛耐药的发展一个有效的未来选择。

多西他赛敏感的Du145和PC3细胞中,PTOV1转导显著增加多西他赛暴露后细胞的存活率,诱导多西他赛耐药基因表达(ABCB1,CCNG2和TUBB2B)。PTOV1诱导了自由基形成和自我更新基因表达(ALDH1A1,LIN28A,MYC和NANOG),相比之下,Du145和PC3细胞敲除PTOV1在G2/M期显著累积,伴随着增加的subG1峰值和凋亡细胞死亡,而这些影响在多西他赛耐药细胞中增强。肿瘤数据分析显示PTOV1表达与前列腺肿瘤分级,耐药性(CCNG2)和自我更新(ALDH1A1,MYC)标记物显著相关,并且这些基因在大多数转移性病变中同时过表达,此外PTOV1基因组扩增与多西他赛抗性和自我更新基因的显著共存。

原始出处:

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    2018-02-28 仁医06
  2. [GetPortalCommentsPageByObjectIdResponse(id=1795442, encodeId=46291e954427d, content=<a href='/topic/show?id=248e1e1345b' target=_blank style='color:#2F92EE;'>#target#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17134, encryptionId=248e1e1345b, topicName=target)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=55683, createdName=仁医06, createdTime=Wed Feb 28 22:50:00 CST 2018, time=2018-02-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1710096, encodeId=84041e1009672, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Thu Dec 28 01:50:00 CST 2017, time=2017-12-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=235555, encodeId=8f1f23555514, content=文章很好,赞赞赞, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzdAIB7UwTkHt6fQkBP8ictliaXtc5gCUmYdAW1sAETC2nhO3q6YjRHkUibyOCtP8ibmXNObTyd63A076/0, createdBy=d4111948983, createdName=1e10c84am36(暂无匿称), createdTime=Mon Aug 21 06:33:35 CST 2017, time=2017-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=235258, encodeId=2c9423525888, content=学习了谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160304/IMG56D94856B1B5D6405.jpg, createdBy=27931687771, createdName=一个字-牛, createdTime=Sun Aug 20 06:43:09 CST 2017, time=2017-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=235251, encodeId=12d8235251a5, content=学习了受益匪浅, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib06iaV3D9Tg5Kzuf9u71gZhPYMiajRtENwicoAABeQtfXOlic8ibhYSy6DvJZWUDVtjRvTfqBffr1XJ6JLtFB5kHicthl/0, createdBy=08bb2061153, createdName=189****7206, createdTime=Sun Aug 20 06:34:15 CST 2017, time=2017-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=235161, encodeId=c53e2351610c, content=学习了受益匪浅。, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDicHg2ldsSNmib46PmdzpO7CQEmPjuULp1v45zPWwMYhrnXgvl3OtmUCZSQfgITWn96X9moL94nUGA/0, createdBy=28072041016, createdName=131****1460, createdTime=Sat Aug 19 19:58:17 CST 2017, time=2017-08-19, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1795442, encodeId=46291e954427d, content=<a href='/topic/show?id=248e1e1345b' target=_blank style='color:#2F92EE;'>#target#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17134, encryptionId=248e1e1345b, topicName=target)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=55683, createdName=仁医06, createdTime=Wed Feb 28 22:50:00 CST 2018, time=2018-02-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1710096, encodeId=84041e1009672, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Thu Dec 28 01:50:00 CST 2017, time=2017-12-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=235555, encodeId=8f1f23555514, content=文章很好,赞赞赞, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzdAIB7UwTkHt6fQkBP8ictliaXtc5gCUmYdAW1sAETC2nhO3q6YjRHkUibyOCtP8ibmXNObTyd63A076/0, createdBy=d4111948983, createdName=1e10c84am36(暂无匿称), createdTime=Mon Aug 21 06:33:35 CST 2017, time=2017-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=235258, encodeId=2c9423525888, content=学习了谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160304/IMG56D94856B1B5D6405.jpg, createdBy=27931687771, createdName=一个字-牛, createdTime=Sun Aug 20 06:43:09 CST 2017, time=2017-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=235251, encodeId=12d8235251a5, content=学习了受益匪浅, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib06iaV3D9Tg5Kzuf9u71gZhPYMiajRtENwicoAABeQtfXOlic8ibhYSy6DvJZWUDVtjRvTfqBffr1XJ6JLtFB5kHicthl/0, createdBy=08bb2061153, createdName=189****7206, createdTime=Sun Aug 20 06:34:15 CST 2017, time=2017-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=235161, encodeId=c53e2351610c, content=学习了受益匪浅。, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDicHg2ldsSNmib46PmdzpO7CQEmPjuULp1v45zPWwMYhrnXgvl3OtmUCZSQfgITWn96X9moL94nUGA/0, createdBy=28072041016, createdName=131****1460, createdTime=Sat Aug 19 19:58:17 CST 2017, time=2017-08-19, status=1, ipAttribution=)]
    2017-08-21 1e10c84am36(暂无匿称)

    文章很好,赞赞赞

    0

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    2017-08-20 一个字-牛

    学习了谢谢分享

    0

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    2017-08-20 189****7206

    学习了受益匪浅

    0

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    2017-08-19 131****1460

    学习了受益匪浅。

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