中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (13): 2104-2108.doi: 10.3969/j.issn.2095-4344.0483

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

靶向抑制Molt-4 T细胞增殖的Smo-siRNA:筛选和评价

朱华民1,2,王 旭3,徐 艳3,杨力建2,陈少华2,吴秀丽2,李扬秋2,3   

  1. 1南方医科大学深圳医院,广东省深圳市 518102;2暨南大学医学院血液病研究所,广东省广州市 510632;3暨南大学再生医学教育部重点实验室,广东省广州市 510632
  • 修回日期:2017-12-02 出版日期:2018-05-08 发布日期:2018-05-08
  • 通讯作者: 李扬秋,博士,研究员,暨南大学医学院血液病研究所,广东省广州市 510632;暨南大学再生医学教育部重点实验室,广东省广州市 510632
  • 作者简介:朱华民,男,1977年生,湖北省武汉市人,汉族,2014年暨南大学毕业,博士,副主任医师,主要从事血液科临床工作及血液免疫治疗研究。

Screening and evaluation of Smo-siRNA targeted to inhibition of Molt-4 cell proliferation

Zhu Hua-min1, 2, Wang Xu3, Xu Yan3, Yang Li-jian2, Chen Shao-hua2, Wu Xiu-li2, Li Yang-qiu2, 3   

  1. 1Shenzhen Hospital, Southern Medical University, Shenzhen 518102, Guangdong Province, China; 2Institute of Hematology, Medical College of Jinan University, Guangzhou 510632, Guangdong Province, China; 3Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou 510632, Guangdong Province, China
  • Revised:2017-12-02 Online:2018-05-08 Published:2018-05-08
  • Contact: Li Yang-qiu, M.D., Investigator, Institute of Hematology, Medical College of Jinan University, Guangzhou 510632, Guangdong Province, China; Key Laboratory for Regenerative Medicine of Ministry of Education, Jinan University, Guangzhou 510632, Guangdong Province, China
  • About author:Zhu Hua-min, M.D., Associate chief physician, Shenzhen Hospital, Southern Medical University, Shenzhen 518102, Guangdong Province, China; Institute of Hematology, Medical College of Jinan University, Guangzhou 510632, Guangdong Province, China

摘要:

文章快速阅读:

文题释义:
靶向治疗:
是在细胞分子水平上,针对已经明确的致癌位点的治疗方式(该位点可以是肿瘤细胞内部的一个蛋白分子,也可以是一个基因片段)。设计相应的治疗药物,药物进入体内会特异地选择致癌位点相结合发生作用,使肿瘤细胞特异性死亡,而不会波及肿瘤周围的正常组织细胞。
Hedgehog信号通路:是人类胚胎发育过程中调控细胞增殖和组织分化的重要信号通路。该信号通路在人类多种肿瘤中异常激活,并对这些肿瘤的生长起着促进作用。Smo是Hedgehog信号传递所必需的受体,在无Hedgehog信号的情况下,激活Smo可导致Hedgehog靶基因的活化;Smo基因突变时,可出现与Hedgehog基因突变相同的表征。T细胞肿瘤是血液肿瘤的一种主要类型,临床上一直存在难治疗、耐药和易复发等难题,因此寻找更有效和特异的治疗方案一直是研究者的一个重要目标。

 

摘要
背景:
研究表明,T淋巴细胞白血病的发生发展与Hedgehog通路的异常有关。Smo基因是该信号通路中的关键基因,控制着Hedgehog信号向细胞膜内的传递。
目的:筛选一种可以高效抑制Molt-4细胞株增殖和诱导凋亡的小干扰RNA(Smo-siRNA)。  
方法:①根据siRNA设计原理,设计并化学合成Smo-siRNA 1,2,3以及无关干扰序列的阴性对照siRNA;②利用NuclefectorTM核转染仪将以上Smo-siRNA分别转入人T淋巴细胞白血病细胞株(Molt-4细胞),分别在转染24,48,72 h 采用qRT-PCR 检测Smo mRNA相对表达水平,CCK-8法检测细胞生长抑制率,Hoechst33258 染色观察细胞凋亡形态,流式细胞仪(AnnexinV/PI法)检测细胞凋亡率。
结果与结论:①利用NuclefectorTM核转染仪成功将Smo-siRNA转入Molt-4细胞,Smo-siRNA 1沉默效果最佳,有效降低Molt-4细胞Smo mRNA表达水平(P < 0.05),并且以48 h作用效果最明显;②转染后24 h,Smo-siRNA可明显抑制Molt-4细胞生长(P < 0.05);③Hoechst染色证实Molt-4细胞符合凋亡的细胞形态学变化;④与对照组比较,Smo-siRNA1组细胞的凋亡率明显增加(P < 0.05);⑤结果表明,小干扰RNA下调Molt-4细胞Smo基因表达可明显抑制Molt-4细胞增殖,并促进凋亡,提示Smo-siRNA具有作为T细胞白血病靶向基因治疗或者协同治疗的潜能。

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID: 0000-0002-3792-275X(朱华民)

关键词: 干细胞, 小干扰RNA, Smo基因, Molt-4细胞, 细胞凋亡, 细胞增殖

Abstract:

BACKGROUND: Studies have shown that the occurrence and development of T lymphocytic leukemia is related to the abnormality of Hedgehog pathway. The Smo gene is a key gene in this signaling pathway and controls the transmission of Hedgehog signaling into the cell membrane.
OBJECTIVE: To design and screen a highly efficient and specific Smo-siRNA which is able to downregulate the Smo gene expression in Molt-4 cells, thereby inhibiting the Molt-4 cells proliferation and inducing apoptosis.
METHODS: (1) Smo-siRNAs numbered 1, 2 or 3, and the scrambled non-siRNA control (SC) were obtained by chemosynthesis. Untreated and sc-treated cells were used as controls. (2) Smo expression levels in Molt-4 cells were analyzed using qRT-PCR at 24, 48, 72 hours after siRNAs delivered by NuclefectorTM. Cell proliferation in vitro was assayed by the cell counting kit-8. The morphology and percentage of apoptotic cells were revealed by Hoechst33258 staining and flow cytometry, respectively.
RESULTS AND CONCLUSION: (1) Smo-siRNAs were successfully transferred into Molt-4 cells, and exhibited best silencing results. After transfection with Smo-siRNA1, the mRNA level of Smo was significantly reduced (P < 0.05), and the lowest level was at 48 hours after transfection. (2) Cell proliferation of Molt-4 cells was significantly inhibited by Smo-siRNA at 24 hours after transfection. (3) Hoechst staining results showed morphological changes of Molt-4 were in accordance with those of apoptotic cells. (4) The apoptotic rate was significantly increased in the Smo-siRNA group compared with the control group (P < 0.05). Findings from this study showed that suppression of Smo by RNA interference could effectively inhibit proliferation and induce apoptosis in Molt-4 cells, indicating that Smo-siRNA as gene targeted therapy or synergistic treatment has therapeutic potential in T-cell malignancies.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: RNA, Small Interfering, Leukemia, T-Cell, Cell Proliferation, Apoptosis, Tissue Engineering

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