Cell Rep & Nat Commun:科学家发现癌症患者为何易贫血及疲劳

2014-10-15 佚名 生物谷

许多癌症患者往往会出现血细胞计数较低的情况,其会直接引发患者疲劳及虚弱,近日,发表在国际杂志Cell Reports和Nature Communications上的两篇研究论文对这一现象进行了解释。首先刊登在国际杂志Cell Reports上的论文中,来自瑞典卡若琳斯卡医学院及中国、香港的科学家们通过研究揭示了肿瘤影响患者血细胞计数及骨髓特性的分子机制。 血细胞计数较低或者说是贫血,其是癌症患者

许多癌症患者往往会出现血细胞计数较低的情况,其会直接引发患者疲劳及虚弱,近日,发表在国际杂志Cell ReportsNature Communications上的两篇研究论文对这一现象进行了解释。首先刊登在国际杂志Cell Reports上的论文中,来自瑞典卡若琳斯卡医学院及中国、香港的科学家们通过研究揭示了肿瘤影响患者血细胞计数及骨髓特性的分子机制。

血细胞计数较低或者说是贫血,其是癌症患者常见的表现,会引发患者出现疲惫的症状;而贫血有时候或许是因为患者服用了细胞稳定的药物所致,这些药物会杀灭包括红细胞在内的健康细胞。癌症本身也会影响血细胞计数,但目前并无合理解释,如今研究人员成功揭示了为何肿瘤会影响血细胞计数及患者骨髓的特性。

这其中扮演重要作用的就是蛋白质VEGF和受体VEGF-2,VEGF是一种血管内皮生长因子,其是肿瘤细胞产生的信号蛋白,在血管发生过程中扮演着重要角色,比如形成新的血管组织等,目前一种癌症疗法就是通过切断肿瘤的VEGF来抑制肿瘤组织产生新血管组织,但是至今关于VEGF和癌症之间的清楚关联研究人员并不清楚。

Yihai Cao教授表示,我们研究揭示VEGF并不仅仅在微观水平上非常重要,比如说其在周围环境中对于肿瘤组织生长的影响上,VEGF在宏观层面上也很关键,其可以帮助解释肿瘤细胞如何影响机体整体的中枢功能。研究人员希望本文研究可以帮助治疗癌症患者血细胞计数较低的表现。目前一种假设认为血细胞计数可以作为一种标志物来帮助鉴别哪些病人因VEGF抑制的癌症药物而获益。

第二篇发表在国际杂志Nature Communications上的研究论文中,研究者利用小鼠进行实验揭示了VEGF联合TNF蛋白共同影响小鼠机体组织血管形成的分子机理,而且研究人员还发现这些蛋白的一种新型未知的相互作用形式,其可以促进癌症的转移扩散,这或许就是潜在引发病人死亡的主要原因。

原始出处

Sharon Lim8, Yin Zhang8, Danfang Zhang8, Fang Chen8, Kayoko Hosaka8, Ninghan Feng8, Takahiro Seki, Patrik Andersson, Jingrong Li, Jingwu Zang, Baocun Sun9, Yihai Cao9.VEGFR2-Mediated Vascular Dilation as a Mechanism of VEGF-Induced Anemia and Bone Marrow Cell Mobilization.Cell Reports.2014

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    2015-06-07 liye789132251
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    2015-05-24 liuli5079
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    2014-12-11 维他命
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    2014-10-17 tamgche
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