PNAS:利用“睡美人”基因传输系统来开发抵御真菌性感染的新型疗法

2014-07-11 佚名 生物谷

近日,刊登在国际杂志PNAS上的一篇研究论文中,来自德克萨斯大学安德森癌症研究中心的研究人员利用睡美人基因(转座子)传输系统成功地对T细胞进行了修饰,旨在开发抵御侵袭性曲霉属真菌引发的致命性感染。 目前这种基因疗法已经成功用于识别和肿瘤相关的抗原,研究者在临床研究中也首次利用睡美人基因(转座子)对免疫系统的T细胞进行了修斯和来攻击特殊类型的白血病细胞和淋巴瘤细胞。研究者Laurence Coop

近日,刊登在国际杂志PNAS上的一篇研究论文中,来自德克萨斯大学安德森癌症研究中心的研究人员利用睡美人基因(转座子)传输系统成功地对T细胞进行了修饰,旨在开发抵御侵袭性曲霉属真菌引发的致命性感染。

目前这种基因疗法已经成功用于识别和肿瘤相关的抗原,研究者在临床研究中也首次利用睡美人基因(转座子)对免疫系统的T细胞进行了修斯和来攻击特殊类型的白血病细胞和淋巴瘤细胞。研究者Laurence Cooper说道,这项研究对于我们开发抵御真菌感染的新型疗法,尤其是那些免疫力低下的患者将会带来极大帮助。

这种睡美人转座子系统由明尼苏达大学的研究人员开发,这项研究中研究者利用这种系统对人类T细胞进行了工程化操作来表达嵌合的抗原受体(CARs),CARs就可以重新定向T细胞的“杀戮”机器;因侵袭性曲霉属真菌引发的致死率非常高,尤其是在造血干细胞移植的病人中,目前一些抗真菌疗法可用,但是病人自身虚弱的免疫系统以及其对抗真菌药物的耐受性往往会削弱药物的效用;因此当前急需一种有效的免疫增强策略来帮助患者有效抵御真菌性感染。

CARs的运用在B细胞恶性肿瘤的患者身上带来了明显的效果,因此研究人员想去研究是否CAR可以被开发用于重新定向针对真菌感染的T细胞。睡美人基因传输系统因何而得名,因为其可以唤醒一种名为转座子的特定DNA序列,而转座子可以改变人类细胞中的DNA分子。

研究者Cooper表示,本文中我们阐述了针对曲霉菌属真菌免疫化疗的一种新途径,其基于通过CAR来重新定向T细胞,CAR可以识别真菌细胞壁上的碳水化合物抗原,因此表达CAR的T细胞就可以被工程化操作用于进行人类疾病的研究。这项研究对于遗传修饰T细胞来靶向作用碳水化合物具有一定的意义,其为开发新型抵御真菌性感染的新型疗法带来了巨大的帮助。

原始出处

Kumaresan PR1, Manuri PR1, Albert ND2, Maiti S1, Singh H1, Mi T1, Roszik J1, Rabinovich B1, Olivares S1, Krishnamurthy J1, Zhang L1, Najjar AM3, Huls MH1, Lee DA4, Champlin RE5, Kontoyiannis DP2, Cooper LJ6.Bioengineering T cells to target carbohydrate to treat opportunistic fungal infection.Proc Natl Acad Sci U S A. 2014 Jul 7

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    2014-09-07 drwjr
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    2014-07-13 zhaojie88