STEM CELLS:心脏激素利钠肽受体A可能参与肿瘤的发生

2013-07-01 颜帅 生物无忧

  来自南佛罗里达大学的纳米医学研究中心的一项最新研究表明,心脏荷尔蒙信号受体大量在炎症组织中表达,癌症就出现从血管中召集干细胞以供给肿瘤的生长。    研究课知道新药物的开发或传递系统,以通过这个受体治疗癌症,我们所知的这个受体称为利钠肽受体A(NPRA)。   研究结果发表在《干细胞》上。“我们的研究显示,NRPA通过癌症细胞产生某些分子因子而传递信号,这个行为会吸引干细胞,而干细胞

  来自南佛罗里达大学的纳米医学研究中心的一项最新研究表明,心脏荷尔蒙信号受体大量在炎症组织中表达,癌症就出现从血管中召集干细胞以供给肿瘤的生长。  

  研究课知道新药物的开发或传递系统,以通过这个受体治疗癌症,我们所知的这个受体称为利钠肽受体A(NPRA)。

  研究结果发表在《干细胞》上。“我们的研究显示,NRPA通过癌症细胞产生某些分子因子而传递信号,这个行为会吸引干细胞,而干细胞会从血管为肿瘤汲取氧和营养物质,” Subhra Mohapatra博士说。“我们发现,如果NRPA信号被阻遏,也就是血管再生,那么肿瘤会因从血管中摄取不到养分而死亡。”    

  运用细胞培养和小鼠模型,Mohapatra医生和她的研究小组相互建模,以研究在炎症组织微环境中的基因突变和暴露。    

  研究人员演示了心脏荷尔蒙NRPA在炎症和癌症导致的肿瘤的发展中扮演着重要的角色。缺乏NRPA信号传递的小鼠不会导致肿瘤的产生。然而研究人员发现,将间叶细胞的干细胞植入肿瘤细胞时,干细胞会从血管内壁中获取养分,被促进萌发的血管(血管再造)需要激活NPRA -缺陷小鼠的肿瘤生长。他们在更进一步的研究发现,NRPA信号传递似乎在吸引这些干细胞转化成肿瘤细胞的过程中,调节关键炎症因子。    

  Mohapatra医生的实验室正测试一种革命性的药物传递系统,这种系统运用特殊的纳米颗粒能靶向对准特定的癌症细胞,好似定位导弹一般,能躲避健康细胞。这种治疗希望能传送一部分分子,这些药物分子可以干扰心脏荷尔蒙受体的信号传导能力。 


NPRA Signaling Regulates Stem Cell Recruitment and Angiogenesis: A Model to Study Linkage Between Inflammation and Tumorigenesis

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    2013-11-18 维他命
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前期的基因表达芯片研究鉴定了1型糖尿病(T1D)患者和胰岛自身抗体阳性受试者之间一些基因表达有差异。为了验证T1D患者中这些基因表达的变化,以及鉴定糖尿病并发症中表达改变的基因,来自佐治亚州摄政大学医学院生物技术和基因组医学中心的Yulan Jin博士等人进行了一项研究,研究发现,由骨髓细胞分泌的炎症介质涉及T1D及其并发症的发生。研究结果在线发表于2013年5月1日的美国《糖尿病治疗》(Diab