Brit J Cancer:紫外损伤导致恶性黑色素瘤的机制研究

2017-07-12 zhangfan MedSci原创

研究明确了紫外辐射损伤导致黑色素瘤的一系列反应轴,组织蛋白酶,转化生长因子-β1以及纤维细胞活化蛋白-α的共同作用推动了黑色素瘤的转移扩散

过量的紫外线辐射(UVR)是恶性黑色素瘤发生的主要危险因素。成纤维细胞活化蛋白(FAP)-α是一种丝氨酸蛋白酶,在活化的成纤维细胞表面的表达。FAP-α通过加速细胞外基质(ECM)降解,促进肿瘤侵袭。但目前FAP-α上调机制的研究尚不明确。

研究人员通过构建人工皮肤,基因阵列表达以及体外共培养系统紫外线辐射的方法对FAP -α表达进行分析。通过组织蛋白酶活性与转化生长因子-β1分泌研究细胞迁移和侵袭。

研究发现,在人类皮肤黑色素细胞中,紫外辐射诱导纤维细胞活化蛋白-α的表达。FAP-α表达受到紫外诱导的转化生长因子-β1调控,组织蛋白酶抑制剂可阻碍其表达。在黑色素瘤细胞模型及在斑马鱼胚胎移植肿瘤模型中,FAP-α介导细胞外基质降解并加速肿瘤细胞转移扩散。

研究明确了紫外辐射损伤导致黑色素瘤的一系列反应轴,组织蛋白酶,转化生长因子-β1以及纤维细胞活化蛋白-α的共同作用推动了黑色素瘤的转移扩散。

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    2017-09-11 sunylz
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    2017-07-12 131****1460

    学习了受益匪浅。

    0

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    2017-07-12 1ddf0692m34(暂无匿称)

    学习了,涨知识

    0

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晚期黑色素瘤患者在纳武单抗治疗出现进展后,有相当比例的持续治疗患者仍可受益。

BMJ:是痣还是黑色素瘤?诊断难度真的超乎你想象

西雅图华盛顿大学医学院研究团队对187名病理学家的黑色素瘤诊断的准确性进行了评价。研究发现这些病理学家对原位黑色素瘤和早期侵袭性黑色素瘤等“中间类型”黑色素瘤的诊断存在不准确性和不一致性。研究人员认为将来应该开发更为“可靠和客观的技术”来支持病理学家对黑色素瘤的目测评估。

Mayo Clin Proc:帕金森病与黑色素瘤竟然有瓜葛!

梅奥诊所研究发现,运动障碍帕金森病患者的皮肤癌黑色素瘤风险高得多,反之亦然。作者说,尽管需要进一步研究,但治疗一种疾病的医生应该警惕对方的迹象,并就这些患者的风险提供咨询。研究结果发表在Mayo Clinic Proceedings。

指甲长黑线当心黑色素瘤,挠破了痣要不要就医

指甲的变化能预示身体健康状况,当你发现指甲长有黑线,切不可因为无任何不适症状而大意。上海同济大学附属同济医院皮肤性病科主任赵敬军主任医师告诉记者,指甲黑线未必是甲下淤血,“指甲上长黑线的情况在临床比较常见,甲母痣、雀斑样痣、黑色素瘤、甲真菌病、外伤等都可能引起。而甲母痣最常见的症状就是甲黑线,容易癌变为黑色素瘤。”恶性黑色素瘤是由皮肤和其他器官黑素细胞产生的肿瘤,虽然其发病率较低,但是恶性度很高,

JCO:Nivolumab治疗晚期黑色素瘤能获得更长的持续缓解时间(CheckMate 037)

英国皇家马斯登国家健康服务信托基金会的James Larkin等报告的一项随机、对照、开放标签的Ⅲ期研究(CheckMate 037)显示,治疗晚期黑色素瘤患者时,Nivolumab显示出更长的缓解持续时间和更好的缓解情况,但与研究者选择化疗方案(ICC)组的患者相比生存情况无差异。推测其原因可能为:ICC组的治疗前退出率较高且出现了交叉治疗,这导致Nivolumab组预后较差患者的比例增高。(J