人stathmin也称原癌基因蛋白18(oncogene protein 18,Op18),是一种广泛存在于细胞质的蛋白质,其相对分子质量约为19×103,可与微管蛋白结合,参与微管和纺锤体的组装;与细胞的增殖、分化、再生和运动均有关,并具有信号活性调节的功...人stathmin也称原癌基因蛋白18(oncogene protein 18,Op18),是一种广泛存在于细胞质的蛋白质,其相对分子质量约为19×103,可与微管蛋白结合,参与微管和纺锤体的组装;与细胞的增殖、分化、再生和运动均有关,并具有信号活性调节的功能。近年来有研究发现,stathmin在多种肿瘤中高表达,并可通过调节微管的解聚,促进肿瘤细胞的运动及侵袭。Stathmin翻译后修饰状态的改变,可影响与p53蛋白的相互作用,参与肿瘤的发生发展。目前单独或者联合化疗药物使用的抗stathmin效应剂已用于某些肿瘤的治疗。虽然stathmin与肿瘤病因学的内在联系尚不十分清楚,但其作为一个潜在的肿瘤标志物或药物靶点值得进一步研究探讨。展开更多
目的研究微管解聚蛋白1(Stathmin-1,STMN1)受特化蛋白1(specialized protein 1,SP1)转录调控对子宫平滑肌瘤细胞增殖和凋亡的作用。方法收集2017年6月至2019年6月在南京同仁医院妇产科接受子宫全切除和次全切除的30例子宫肌瘤患者的肌...目的研究微管解聚蛋白1(Stathmin-1,STMN1)受特化蛋白1(specialized protein 1,SP1)转录调控对子宫平滑肌瘤细胞增殖和凋亡的作用。方法收集2017年6月至2019年6月在南京同仁医院妇产科接受子宫全切除和次全切除的30例子宫肌瘤患者的肌瘤组织及周围(瘤旁)平滑肌,RT-qPCR检测子宫平滑肌瘤组织和周围平滑肌组织中STMN1和SP1 mRNA水平。CCK-8、TUNEL和Western blot检测敲低STMN1后人子宫平滑肌瘤(human uterine leiomyoma,HuLM)细胞增殖和凋亡。利用JASPAR网站预测转录因子SP1和STMN1启动子的结合位点。采用RT-qPCR、Western blot、荧光素酶、ChIP验证SP1和STMN1的转录调控,进行功能拯救实验。结果相较于正常平滑肌细胞,子宫平滑肌瘤组织中STMN1和SP1表达上调(P<0.001)。敲低STMN1抑制HuLM细胞增殖并促进凋亡(P<0.001)。SP1作为转录因子正向调控STMN1表达水平,敲低SP1能够抑制HuLM细胞增殖并促进凋亡(P<0.001),进一步过表达STMN1逆转敲低SP1对细胞增殖和凋亡的作用(P<0.001)。结论转录因子SP1通过上调STMN1促进子宫平滑肌瘤细胞增殖并抑制凋亡。展开更多
Amyloid precursor protein （APP） plays a critical role in the formation of Alzheimer＇s disease （AD）. The intracellular domain APP （AID） was suggested to cause neurotoxicity in the nucleus. To investigate the fun...Amyloid precursor protein （APP） plays a critical role in the formation of Alzheimer＇s disease （AD）. The intracellular domain APP （AID） was suggested to cause neurotoxicity in the nucleus. To investigate the functions AID, yeast two-hybrid screening was performed to identify the proteins which interact with AID. The human brain cDNA library was screened using pGBKT7-AID as a bait, and several positive clones were identified. One of them encodes a part of the human stathmin-like 2 protein （STMN2）. The interaction between STMN2 and APP implies that STMN2 may have an important function in APP-mediated AD formation.展开更多
文摘人stathmin也称原癌基因蛋白18(oncogene protein 18,Op18),是一种广泛存在于细胞质的蛋白质,其相对分子质量约为19×103,可与微管蛋白结合,参与微管和纺锤体的组装;与细胞的增殖、分化、再生和运动均有关,并具有信号活性调节的功能。近年来有研究发现,stathmin在多种肿瘤中高表达,并可通过调节微管的解聚,促进肿瘤细胞的运动及侵袭。Stathmin翻译后修饰状态的改变,可影响与p53蛋白的相互作用,参与肿瘤的发生发展。目前单独或者联合化疗药物使用的抗stathmin效应剂已用于某些肿瘤的治疗。虽然stathmin与肿瘤病因学的内在联系尚不十分清楚,但其作为一个潜在的肿瘤标志物或药物靶点值得进一步研究探讨。
基金Supported by the National Natural Science Foundation of China (Nos. 30125021 and 30270681), the Bugher Foundation (New York), and the SRFDP of the Ministry of Education of China
文摘Amyloid precursor protein （APP） plays a critical role in the formation of Alzheimer＇s disease （AD）. The intracellular domain APP （AID） was suggested to cause neurotoxicity in the nucleus. To investigate the functions AID, yeast two-hybrid screening was performed to identify the proteins which interact with AID. The human brain cDNA library was screened using pGBKT7-AID as a bait, and several positive clones were identified. One of them encodes a part of the human stathmin-like 2 protein （STMN2）. The interaction between STMN2 and APP implies that STMN2 may have an important function in APP-mediated AD formation.
