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Sci Rep:膀胱癌中以可溶性Ephrin-A1 / EphA2系统为靶标,利用来氟米特对血管新生抑制作用的研究

2018-02-03 AlexYang MedSci原创

血管新生在膀胱癌中(BCa)具有重要的作用。免疫抑制药物来氟米特吸引了世界范围内的注意。然而,来氟米特在癌症中对血管新生的影响仍旧未知。最近,有研究人员报道了可溶性Ephrin-A1(sEphrin-A1)在BCa细胞系(RT4, T24和 TCCSUP)和人脐静脉内皮细胞(HUVECs)共培养上清中与永生性的泌尿上皮细胞(SV-HUC-1)和HUVECs共培养上清中相比,表达增加。sEphrin

血管新生在膀胱癌中(BCa)具有重要的作用。免疫抑制药物来氟米特吸引了世界范围内的注意。然而,来氟米特在癌症中对血管新生的影响仍旧未知。

最近,有研究人员报道了可溶性Ephrin-A1(sEphrin-A1)在BCa细胞系(RT4, T24和 TCCSUP)和人脐静脉内皮细胞(HUVECs)共培养上清中与永生性的泌尿上皮细胞(SV-HUC-1)和HUVECs共培养上清中相比,表达增加。sEphrin-A1从BCa细胞中以一个单体的形式释放,并且功能形式为配体。包含有sEphrin-A1的共培养上清能够引起内皮细胞EphA2内化和下调,并且能够戏剧性的功能激活HUVECs。该Ephrin-A1 / EphA2系统主要在BCa组织中调控血管再生起作用。

研究人员展示了来氟米特(LEF)在一个N-butyl-N-(4-hydroxybutyl)-nitrosamine(BBN)诱导的膀胱恶性肿瘤模型和肿瘤异种种植模型中能够抑制血管再生。另外,通过显著的抑制 sEphrin-A1/EphA2系统,在BCa细胞和HUVEC共培养系统中同样能够抑制血管再生。Ephrin-A1过表达能够部分的恢复LEF诱导的血管生成抑制和随后的肿瘤生长抑制。因此,LEF可以通过对功能性血管生成 sEphrin-A1/EphA2系统的抑制,从而产生对BCa细胞和BCa组织中显著的抗血管生成作用。另外,研究人员认为,LEF也许具有治疗BCa的潜力。

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    2018-02-05 changjiu

    学习一下谢谢

    0

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    2018-02-05 zhaojie88

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