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美科学家发现治疗黑色素瘤药物治疗新靶点

2015-05-08 佚名 生物谷

近日,来自美国的科学家在国际学术期刊the journal of clinical cancer research在线发表了一篇关于发现黑色素瘤潜在药物靶点的文章。   在该项研究中,研究人员在黑色素瘤临床样本中发现了高水皮表达的一种特定酶类,他们认为这种酶是促进黑色素瘤生长的重要因素。这种叫做ITK(interleukin-2 inducible T-cell kinase)的

近日,来自美国的科学家在国际学术期刊the journal of clinical cancer research在线发表了一篇关于发现黑色素瘤潜在药物靶点的文章。
 
在该项研究中,研究人员在黑色素瘤临床样本中发现了高水皮表达的一种特定酶类,他们认为这种酶是促进黑色素瘤生长的重要因素。这种叫做ITK(interleukin-2 inducible T-cell kinase)的酶在之前研究中从未发现其在实体瘤的生长中有任何作用,在正常情况下,ITK主要在一类免疫细胞亚群中表达。
 
研究人员指出,ITK在黑色素瘤细胞中高表达,降低ITK活性能够抑制黑色素瘤细胞生长,因此,ITK可能是治疗黑色素瘤的一个潜在药物靶点。但到目前为止,只有一种抑制ITK的药物得到批准应用在血液癌症治疗中,因此开发靶向ITK的治疗药物对于治疗黑色素瘤具有重要意义。
 
在该研究中,研究人员对正常皮肤组织,非癌性皮肤痣以及黑色素瘤样本进行了分析,结果发现ITK在原位黑色素瘤和转移性黑色素瘤中表达水平更高,并且在转移性黑色素瘤样本中,91%的肿瘤样本其ITK表达水平高于非癌性皮肤痣。当在黑色素瘤细胞中抑制ITK表达,细胞增殖发生减缓同时迁移性减弱,而通过抑制剂抑制ITK酶活性同样能够减弱细胞的增殖和迁移能力。
 
之前研究表明ITK主要表达在特定免疫细胞亚群,而这项研究发现ITK在黑色素瘤细胞中具有高表达,同时对于促进黑色素瘤细胞生长具有重要作用,因此开发靶向ITK的抑制剂药物或对抑制黑色素瘤生长进而达到治疗效果具有重要意义。

原始出处:

Carson C.C., Moschos S.J.,Edmiston S.N., Darr D.B., Nikolaishvili-Feinberg N, Groben PA, Zhou X, Kuan PF, Pandey S, Chan KT, Jordan JL, Hao H, Frank JS, Hopkinson DA, Gibbs DC, Alldredge VD, Parrish E, Hanna SC, Berkowitz P, Rubenstein DS, Miller CR, Bear JE, Ollila DW, Sharpless NE, Conway K, Thomas NE.IL-2 Inducible T-cell Kinase, a Novel Therapeutic Target in Melanoma. Clinical Cancer Research, May 1, 2015.doi: 10.1158/1078-0432.CCR-14-1826.

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    2015-12-17 sunylz
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    2015-05-10 lsndxfj
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    2015-05-08 huaxipanxing

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