CN114262687A - 一种从非神经细胞转化制备保留年龄特征的人源性背根节神经元的方法 - Google Patents
一种从非神经细胞转化制备保留年龄特征的人源性背根节神经元的方法 Download PDFInfo
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Abstract
本发明涉及一种从非神经细胞转化制备保留年龄特征的背根节神经元的方法。本发明的制备方法优化了关键的细胞直接转分化基因组合及调控表达水平的启动子,包装可以高效感染各种年龄供体源细胞的病毒,并采用合适的包被基质促进供体源细胞及转化后的神经细胞贴壁生长,并利用含有可以促进转分化的小分子化合物与生长因子的诱导分化培养液,在10‑14天内经过若干次更换分化培养液后转分化得到大量的背根节神经元,最后经过分离纯化获得高纯度的背根节神经元。
Description
技术领域
本发明涉及神经痛的研究和治疗领域,更具体地,本发明涉及与之相关的一种从非神经细胞转化制备保留年龄特征的人源性背根节神经元的方法。
背景技术
神经痛是一种临床常见的复杂疾病,根据病因或发病部位分为很多类型,如带状疱症后遗神经痛、癌性神经痛、糖尿病性神经痛、中风后神经痛、三叉神经痛、舌咽神经痛等。各种长期慢性的神经痛都会严重影响患者的生活质量,有的剧痛甚至会导致病人难以忍受而自杀。多种神经痛均呈现年龄相关性(诱发疾病也与年龄密切相关),如带状疱疹后遗神经痛的发生主要在成年以后,年龄越大发病率越高。糖尿病性神经痛、中风后神经痛等也均呈现明显的年龄相关性。
背根节神经元是分布于脊髓背根节的外周感觉神经元,是各种痛觉传入中枢的初级神经元,与多种疼痛症状及其发病机制密切相关。采用发病阶段人源背根节神经元作为细胞病理模型对深入研究神经痛的发病机制、筛选研发有效的治疗药物以及开发基因疗法等具有非常重要的意义以及极为可观的市场价值。
背根节神经的获得方式主要包括原代培养和分化两种方式。原代培养动物(以小鼠、大鼠为主)背根节神经细胞技术相对成熟且来源充足。然而,人与其它动物的神经系统具有较大的差异,动物来源的神经细胞种属不匹配,病理机制(与人类)不相符是导致众多研究成果不可靠及筛选药物无效的主要原因;原代培养人源的神经细胞,虽解决了种属匹配问题,但由于技术、伦理与法律的限制,仅有少数机构能够获得极其有限数量的人源的神经细胞,无法保障广泛的研究和药物筛选的使用。很显然,原代培养动物及人源背根神经细胞都无法保障或满足机制研究及筛药的需要。如何能源源不断地获得具有年龄及病理特征的人源性背根节神经细胞一直是一项尚待攻克的国际性难题。
由2012年诺贝尔医学或生理学奖得主山中伸弥等人提出的诱导性多能干细胞(induced pluripotent stem cells,iPSC)技术虽然解决了无法获得人源性亚神经细胞的难题,但iPSC诱导技术方法较为复杂,分离及鉴定过程繁琐,获得细胞的时间较长(6-7个月),而且在制备过程中细胞被重设至胚龄特征,从而失去了神经痛病理模型细胞所需要的发病阶段的关键病理特征。虽然iPSC诱导亚型神经细胞在神经退行疾病的治疗领域应用前景较大,但由于现代技术的限制以及神经细胞的修复特征,在短时期内将其用于修复神经退行性疾病损伤还有诸多无法解决的问题。而在机制研究及新药筛选领域,iPSC诱导的神经细胞由于失去了发病年龄以及关键的病理特征,其实际应用效果也有待深入评估验证。基于iPSC技术制备背根节神经元的相关方法可参见Nickolls等公开发表的论文(Transcriptional programming of human mechanosensory neuron subtypes frompluripotent stem cells,Cell Reports,2020)。
直接转分化技术(直接细胞重编程技术)是在iPSC技术基础上快速发展崛起的一种新兴生物技术,即,在特定的培养条件下,利用特定的基因组合等促使不同细胞类型之间互相直接转换。目前利用这一技术已可从多种体细胞直接转分化得到若干特化亚型神经元,包括背根节神经元、运动神经元以及抑制性中间神经元等。该技术的独特优势在于所生成的患者功能性神经细胞保留了母细胞的年龄相关特征以及患者体内同类神经细胞受到疾病影响的关键病理特征,因此在发病阶段疾病的病理机制研究、新药筛选、药物研发及基因疗法开发方面具有引人瞩目的应用前景。相应地,由此生成的正常人功能性神经细胞则保留了母细胞的年龄特征及正常的生理功能特征,可以用于药物的毒性分析测试等。
然而,上述技术的普遍缺点在于转化效率低、分离纯化收率低、难以获得大量高纯度的亚型神经元。以背根节神经元为例,目前已报道的直接转分化技术主要用于由小鼠成纤维细胞或人胚胎成纤维细胞等转化生成背根节神经元,该过程的转化效率以及产品纯度均很低;当用于由成年人或老年人皮肤成纤维细胞转分化制备背根节神经元时,上述问题尤为显著。以Blanchard等人之前发表的文章(Selective conversion of fibroblastsinto peripheral sensory neurons,Nature Neuroscience,2015)为例,当其采用的供体源细胞为鼠胚胎细胞时,转分化效率低于6%;而当采用人胚胎细胞或成年人皮肤成纤维细胞时,转分化效率分别仅为12%和1%,上述极低的转分化效率难以满足实际应用需求。相关现有技术文献及技术细节比较可参见附表1。
综上所述,各种神经痛病理机制研究及筛药的最理想的细胞模型,是处于发病年龄(发病期)、具有病理特征的人源性背根节神经元。尽管需求极大,但市场上仍无可以高效率、高纯度制备正常人或神经痛患者发病阶段背根节神经元的相关技术与产品。因此本领域中迫切需要研发一种可以高效率、高纯度制备保留年龄特征的背根节神经元的方法。
发明内容
为解决上述技术问题,本发明旨在采用直接转分化技术将各种年龄的人的皮肤成纤维细胞等非神经细胞高效转化为高纯度的、保留相应年龄/病理特征的背根节神经元。上述通过直接转分化技术获取的功能细胞不仅可保留供体源细胞的年龄特征,还可保留神经痛患者受影响功能细胞的关键病理特征(当供体源细胞来源于神经痛患者时),因而在疾病机理研究与新药筛选研发方面具有独特的应用前景。
基于上述目的,在第一方面中,本发明提供了一种从非神经细胞转化制备保留年龄特征的背根节神经元的方法,其包括如下步骤:
1)构建含有细胞转分化基因组合的病毒载体,并通过转染细胞进行病毒包装;
2)培养供体源细胞,并用经包装的病毒感染经培养的供体源细胞;
3)在诱导分化培养液中诱导所述供体源细胞直接转分化为背根节神经元;以及
4)分离纯化所得的背根节神经元,
其中,所述细胞转分化基因组合包含以下基因的组合:(1)选自NGN1、NGN2和ASCL1中的至少一种基因;(2)选自ISL1、ISL2、Brn3a、Brn3b和Brn3c中的至少两种基因;以及任选的(3)选自SOX4和SOX11中的至少一种基因。
在进一步的实施方式中,所述基因为来源于人或小鼠等其它任何种属的同源基因。
在进一步的实施方式中,所述病毒载体可选自逆转录病毒载体、慢病毒载体或AAV病毒载体,且各载体中调控表达水平的启动子可选自CMV、CAG、EF1α、PGK、TRE Tight、TRE3G中的任何一种或多种。优选地,所述启动子选自CMV。
在进一步的实施方式中,在病毒载体的构建过程中可以通过不同来源的2A序列(例如,T2A、E2A、P2A、F2A等)或IRES序列来连接上述基因,并可任选地进一步引入绿色或红色荧光报告基因,以便于确定病毒包装质量和滴度、观察细胞形态的变化、测定细胞纯度以及用于后续各种具体应用分析等。
在进一步的实施方式中,所述供体源细胞可以是任何年龄的正常人或患者的皮肤成纤维细胞或其它非神经细胞,如各种干细胞、肺成纤维细胞、包皮成纤维细胞、胶质细胞等。优选地,所述供体源细胞为正常人或患者的皮肤成纤维细胞。
在进一步的实施方式中,在培养供体源细胞的过程中采用合适的包被基质对培养皿等培养容器进行预包被,所述合适的包被基质可选自层粘连蛋白(laminin)、明胶(gelatin)、纤连蛋白(fibronectin)、Matrigel中的至少一种。优选地,所述包被基质为Matrigel。
在进一步的实施方式中,所述诱导分化培养液含有特定的促进转分化的小分子化合物以及生长因子的组合,所述促进转分化的小分子化合物包含佛司可林(FSK)、cAMP、双丁酰环腺苷酸(DB-cAMP)、RA、LDN-193189(LDN)、SB431542、CHIR99021中的一种以上,优选两种以上;所述生长因子包含bFGF2、NGF、GDNF、NT3中的一种以上。优选地,所述小分子化合物为佛司可林和/或LDN-193189。优选地,所述生长因子为bFGF2。
在进一步的实施方式中,所述分离纯化是采用本领域常用的消化方法(如胰蛋白酶法等)将转分化后的细胞消化并重悬为单细胞悬浮液,用细胞滤器、流式细胞仪或在明胶或纤连蛋白包被的培养皿上差异性贴壁等方法分离得到高纯度的背根节神经元。
在第二方面中,本发明提供了采用第一方面所述的制备方法制备得到的保留年龄特征的背根节神经元。
在第三方面中,本发明提供了在二方面中所述的保留年龄特征的背根节神经元在建立用于筛选神经痛治疗药物的方法中的用途。
本发明的其它方面由于本文的公开内容,对本领域的技术人员而言将是显而易见的。
此外,应当理解,在本发明的范围内,本发明的上述各技术特征和在下文(如实施例)中具体描述的各技术特征之间均可互相组合,从而构成新的或优选的技术方案。限于篇幅,在此不再一一累述。
附图说明
图1.为病毒包装时,293T细胞共转染包装质粒以及携带绿色荧光蛋白和目标基因的表达质粒后的转染效率示意图。在293T细胞中质粒转染50小时左右后,几乎所有细胞均表达较高水平的绿色荧光报告基因,转染效率高于90%。图中显示比例尺为50μm。缩写含义(下同):GFP:绿色荧光蛋白;BF:明场图像;TFs:转录因子。
图2.为人皮肤成纤维细胞感染病毒后开始诱导分化前的显微示意图。在幼儿及成年正常人的皮肤成纤维细胞中,病毒感染48小时左右,大部分细胞均显示较强的绿色荧光,表明GFP阳性细胞中转化基因表达水平较高,有利于后续高效地转分化为目标神经元。图中白色箭头显示少数未感染病毒或GFP弱表达的皮肤成纤维细胞。图中显示比例尺为300μm。缩写含义(下同):DRGN:背根节神经元。
图3.为幼儿及成年人皮肤成纤维细胞感染病毒并在诱导分化培养液中培养3天期间的细胞形态变化示意图。感染了选定基因组合的GFP阳性的皮肤成纤维细胞在特定的诱导分化培养液中逐渐发生形态变化,在诱导后第1天一些GFP阳性细胞胞体开始缩小、隆圆,诱导后第二天大部分GFP阳性细胞胞体都明显变化,第3天部分细胞已经开始长出神经突起(如红色箭头所示),形成明显的神经元形态,转化效率达90%以上。白色箭头显示少数未感染病毒或GFP弱表达的未能转化的皮肤成纤维细胞。图中显示比例尺为300μm。
图4.为诱导生成的人背根节神经元经分离纯化以后的示意图。在感染病毒后第10-14天期间,大部分GFP阳性细胞完全转化为神经元,未转化的皮肤细胞经过分离去除后,神经元的纯度达到95%以上。图中显示比例尺为300μm。
图5.为分析包被基质对转化效率影响的示意图。选择4种包被基质,即,层粘连蛋白(L)、明胶(G)、纤连蛋白(F)、Matrigel(M),按不同的组合分别加入培养皿中包被过夜,在转分化第10天用荧光显微镜每组分别随机选取5-10个20x视野,统计各视野中GFP阳性的神经细胞数目,然后计算相对于数目最多组的相对转化率以进行对比分析。由图可见,不含包被基质的实验组(-LGFM)几乎没有背根节神经元生成,而以上4种基质单独包被或以≥2种的组合包被均可以获得不同程度的转化效果。
图6.为分析小分子化合物及生长因子的组合对转化效率影响的示意图。选择FSK、RA、LDN、SB431542(SB)、CHIR99021(CHIR)等小分子化合物以及bFGF2、NGF、GDNF、NT3等生长因子,按不同组合加入诱导分化培养液中,在第10天用荧光显微镜每组分别随机选取5-10个20x视野,统计各视野中GFP阳性的神经细胞数目,然后计算相对于数目最多组的相对转化率以进行对比分析。由图可见,在诱导分化培养液中加入以上各种成分时转化效率最高,去掉FSK、LDN或bFGF2后对转化效率的影响最大。
图7.为诱导生成的人背根节神经元表达一般神经元特征蛋白质Tuj1的示意图。其中99%以上GFP阳性的细胞同时特异性地表达一般神经元特征蛋白质Tuj1。图中显示比例尺为300μm。
图8.为诱导生成的人背根节神经元表达一般神经元特征蛋白质MAP2的示意图。其中99%以上GFP及Tuj1阳性的细胞同时特异性地表达一般神经元特征蛋白质MAP2。图中显示比例尺为50μm。
图9.为诱导生成的人背根节神经元表达神经元突触蛋白SYN1的示意图。GFP及Tuj1阳性细胞为转化生成的人背根节神经元,其明显表达了神经突触蛋白SYN1。GFP及Tuj1阴性、HST阳性的细胞中SYN1染色为阴性,表明抗体特异性强。图中显示比例尺为20μm。
图10.为诱导生成的人背根节神经元表达外周神经元特征性蛋白质外周蛋白Peripherin及神经丝蛋白NF200的示意图。GFP及Tuj1阳性细胞为转化生成的人背根节神经元,其中:A)转化生成的人背根节神经元表达特征性的外周蛋白Peripherin;B)转化生成的人背根节神经元表达特征性的神经丝蛋白NF200。图中显示比例尺为20μm。
图11.为诱导生成的人背根节神经元表达背根节神经元特征性转录因子Brn3a的示意图。GFP及Tuj1阳性细胞为转化生成的人背根节神经元,其细胞核中明显表达了背根节神经元特征性转录因子Brn3a。图中显示比例尺为20μm。
图12.为诱导生成的人背根节神经元表达兴奋性神经元特征性蛋白VGluT1的示意图。GFP及Tuj1阳性细胞为转化生成的人背根节神经元,其胞体与突起中明显表达了兴奋性神经元特征性蛋白VGluT1。图中显示比例尺为20μm。
图13.为诱导生成的人背根节神经元表达功能性受体蛋白TrkA的示意图。GFP及Tuj1阳性细胞为转化生成的人背根节神经元,其胞体与突起中都明显表达了背根节神经元特征性的功能性受体蛋白TrkA。图中显示比例尺为20μm。
图14.为诱导生成的幼儿及成人背根节神经元中β-半乳糖苷酶(β-Gal)的染色示意图。成年皮肤细胞转化制备的背根节神经细胞中衰老标记物β-Gal染色阳性细胞更多,且各个阳性细胞染色密度显著增强。图中显示比例尺为20μm。
图15.为诱导生成的幼儿及成人背根节神经元中端粒保护性抗氧化酶(PRDX1)表达水平的示意图。GFP阳性细胞为转化生成的人背根节神经元,其胞体与突起中都表达了端粒保护性抗氧化酶PRDX1。成人背根节神经元中端粒保护性抗氧化酶PRDX1表达水平显著下降。图中显示比例尺为20μm。
图16.为诱导生成的幼儿及成人背根节神经元中长寿相关异染色质蛋白(HP1γ)表达水平的示意图。GFP阳性细胞为转化生成的人背根节神经元,长寿相关异染色质蛋白HP1γ分布于细胞核中。成人背根节神经元中长寿相关异染色质蛋白HP1γ表达水平显著下降。图中显示比例尺为20μm。
图17.为人NGN1基因及蛋白质序列。小鼠或其它种属的NGN1同源基因在本发明直接转分化制备方法中也有与之类似的效果。
图18.为人NGN2基因及蛋白质序列。小鼠或其它种属的NGN2同源基因在本发明直接转分化制备方法中也有与之类似的效果。
图19.为人ASCL1基因及蛋白质序列。小鼠或其它种属的ASCL1同源基因在本发明直接转分化制备方法中也有与之类似的效果。
图20.为人SOX4基因及蛋白质序列。小鼠或其它种属的SOX4同源基因在本发明直接转分化制备方法中也有与之类似的效果。
图21.为人SOX11基因及蛋白质序列。小鼠或其它种属的SOX11同源基因在本发明直接转分化制备方法中也有与之类似的效果。
图22.为人ISL1基因及蛋白质序列。小鼠或其它种属的ISL1同源基因在本发明直接转分化制备方法中也有与之类似的效果。
图23.为人ISL2基因及蛋白质序列。小鼠或其它种属的ISL2同源基因在本发明直接转分化制备方法中也有与之类似的效果。
图24.为人BRN3a基因及蛋白质序列。小鼠或其它种属的BRN3a同源基因在本发明直接转分化制备方法中也有与之类似的效果。
图25.为人BRN3b基因及蛋白质序列。小鼠或其它种属的BRN3b同源基因在本发明直接转分化制备方法中也有与之类似的效果。
图26.为人BRN3c基因及蛋白质序列。小鼠或其它种属的BRN3c同源基因在本发明直接转分化制备方法中也有与之类似的效果。
具体实施方式
为制备保留年龄特征的背根节神经元,本发明根据直接转分化的技术原理,在供体源细胞中通过病毒导入能够决定神经细胞命运及其亚型的关键基因组合,并在适当的转化培养条件下诱导转化生成功能性的背根节神经元。
具体地,本发明提供了一种从非神经细胞转化制备保留年龄特征的背根节神经元的方法,其包括如下步骤:
1)构建含有细胞转分化基因组合的病毒载体,并通过转染细胞进行病毒包装;
2)培养供体源细胞,并用经包装的病毒感染经培养的供体源细胞;
3)在诱导分化培养液中诱导所述供体源细胞直接转分化为背根节神经元;以及
4)分离纯化所得的背根节神经元,
其中,所述细胞转分化基因组合包含以下基因的组合:(1)选自NGN1、NGN2和ASCL1中的至少一种基因;(2)选自ISL1、ISL2、Brn3a、Brn3b和Brn3c中的至少两种基因;以及任选的(3)选自SOX4和SOX11中的至少一种基因。
其中,NGN1、NGN2和ASCL1基因在SOX4或SOX11的协同作用下对于神经系统发育过程中不同类型神经细胞的分化起决定性的作用,而ISL1、ISL2、Brn3a、Brn3b和Brn3c五种基因对特定亚型背根节神经元的特化起决定性的作用。上述基因的各种有效组合可以诱导产生本发明所述的背根节神经元。需要重点强调的是,在上述基因组合中发挥协同作用的SOX4或SOX11可以显著性地使转化效率提高至70%以上,该技术效果是预料不到的。
上述各基因及其蛋白质序列可参见说明书核苷酸和氨基酸序列表以及附图图17-26。
对于上述制备方法,在实际制备应用中可具体包含如下步骤:
a.将上述基因分别构建入商售或自有的逆转录病毒载体、慢病毒载体或AAV病毒载体中,各载体中调控表达水平的启动子可以是CMV,CAG,EF1α,PGK,TRE Tight,TRE3G中的任何一种或多种。同时可以通过不同来源的2A序列(例如,T2A、E2A、P2A、F2A等)或IRES序列来连接上述基因,并可任选地进一步引入绿色或红色荧光报告基因,以便于确定病毒包装质量和滴度,观察细胞形态的变化,测定细胞纯度以及用于后续各种具体应用分析。
b.通过细胞转染将上述基因载体分别包装成相应的逆转录病毒、慢病毒或AAV病毒,测定各种病毒的滴度,确定感染供体源细胞的病毒用量,使各种病毒感染率达到50%~100%。
c.将供体源细胞按适当密度接种于层粘连蛋白、明胶、纤连蛋白、Matrigel中的至少一种所预包被的培养皿中。所述供体源细胞可以是任何年龄的正常人或患者的皮肤成纤维细胞或其它非神经细胞,如各种干细胞、肺成纤维细胞、包皮成纤维细胞、胶质细胞等。优选地,所述供体源细胞为正常人或患者的皮肤成纤维细胞。
d.加入适量的病毒进行感染,一段时间(例如24小时)后更换为新鲜的源细胞培养液。
e.确定含有促进转分化的小分子化合物与生长因子的特定诱导分化培养液:在含有0.5%-2%B27,0.5%-2%N2的DMEM/F12/Neurobasal(1:1:1或2:2:1)基础液中,加入1-20μM FSK,0.1-5μM RA,0.1-1μM LDN,1-10μM SB431542,1-10μM CHIR99021中的一种以上,以及1-200ng/mL bFGF2、NGF、GDNF、NT3中的一种以上的组合。
f.在供体源细胞感染病毒后定期(例如第3、5、7、10天;或每天;或其它不同间隔时间)更换诱导分化培养液。
g.在第10-14天分离纯化带有荧光的背根节神经元,用荧光显微镜分别计数总细胞及神经细胞以确定其纯度。
h.将部分纯化后的背根节神经元接种在预先包被好的培养皿中,用背根节神经细胞培养液继续培养以供鉴定,余下冻存于适于神经细胞的冻存液备储存、运输。
i.对以上制备得到的背根节神经元进行特征鉴定,该鉴定可包含例如以下方面:
A.一般神经元表达的特征蛋白质:Tuj1、MAP2、NeuN,Tau等;
B.神经元突触蛋白质:Synapsin 1(SYN1);
C.背根节神经元特征蛋白质:Peripherin、NF200、BRN3a、BRN3b、VGluT1、TrkA等。
需要注意的是,上述具体制备方法仅为更好地阐释本发明,而非限制本发明的范围。本领域技术人员可根据实际制备需求选择性地调整其中部分步骤的顺序,以及省略其中部分步骤。此外,其中相应步骤中的试剂、时间、浓度以及其他参数等均可根据实际情况进行适当调整,这对于本领域技术人员而言均是显而易见的。
由上文可知,本发明的制备方法优化了关键的细胞直接转分化基因组合及调控表达水平的启动子,包装可以高效感染各种年龄供体源细胞的病毒,并采用合适的包被基质促进供体源细胞及转化后的神经细胞贴壁生长,并利用含有可以促进转分化的小分子化合物与生长因子的诱导分化培养液,在10-14天内经过若干次更换分化培养液后转分化得到大量的背根节神经元,最后经过分离纯化获得高纯度的背根节神经元。
本发明制备方法所具有的独特优势列举如下:
1.简单:供体源细胞感染病毒以后,只需更换诱导分化培养液若干次(例如4次)即可,无需进行繁琐操作;
2.快速:仅需10-14天即可获得大量目标产品;
3.成本低:相比于iPSC技术,无需长期每日更换昂贵的培养液(iPSC的培养液非常昂贵);
4.转化效率高,对感染病毒(GFP阳性)的各种年龄皮肤细胞的转化效率高达90%以上;
5.收率高:仅需1-2个100mm培养皿即可获得百万数量级的经纯化背根节神经细胞;
6.分离纯化简单、产品纯度高,经纯化的背根节神经细胞可达90%以上纯度;
7.制得的背根节神经细胞符合神经痛患者的发病期年龄与病理特征;
8.制得的背根节神经细胞可以有效冻存、复苏,液氮冻存可达半年以上,复苏存活率达到90%;
9.制得的背根节神经细胞可以短期或长期培养,最长可培养3个月以上;
10.制得的背根节神经细胞适用于作为细胞病理模型,研究发病机制、药物作用机制、筛选研发药物及开发基因疗法,或用于化合物毒性测试等;
11.可用于快速建立大样本正常及患者人群的背根节神经细胞库,用以支持大数据分析以及精准疗法开发。
下面结合具体实施例,进一步阐述本发明。
实施例
实施例1从幼儿及成人皮肤成纤维细胞快速、高效地制备高纯度的背根节神经元
1.材料
1)细胞:用于病毒包装的293T细胞购自美国ATCC(CRL-3216);幼儿及成人皮肤成纤维细胞分别购自Genetic Cell Repository(Coriell Institute for MedicalResearch,NJ,USA,货号AG07095)及Sciencell(货号#2320)公司。将293T及人皮肤成纤维细胞用含10-20%FBS及1×P/S双抗的高糖DMEM培养液进行培养。
2)仪器设备与试剂:
A.CO2细胞培养箱(ESCO CLM-170B-8-CN);超净工作台(ESCO AC2-5S1);荧光显微镜(Thermo EVOS M5000);超低温冰箱(海尔DW-86L388J);液氮罐(海尔YDS-175-216-F);高速冷冻离心机(白洋BY-R20型);常温高速离心机(湘仪H1650-W);
B.智能高压蒸汽灭菌器(上海申安LDZM-80KCS);美国SHELLAB干燥箱(CE3F-2);电热数显恒温水浴锅(力辰HH-2);
C.BIO-RAD梯度PCR仪(T100);BIO-RAD电泳仪(PowerPac HC);化学发光成像系统(勤翔ChemiScope 6200Touch);紫外割胶分析仪(君意JY02);隔水式培养箱(上海一恒GHP-9080);振荡培养箱(知楚仪器,ZQTY-70N);
D.DMEM,F12(Hyclone);FBS,Neurobasal,B27,N2,胰蛋白酶,DMSO(Invitrogen);明胶,纤连蛋白,层粘连蛋白,Matrigel(BD);佛司可林,RA,LDN-193189.HCl,CHIR99021,SB431542(Selleck);bFGF2,NGF,GDNF,NT3(Peprotech);Lipofectamine2000(Invitrogen);PEI(Polysciences);系列DNA限制性内切酶(Neb),QIAGEN Plasmid Midi试剂盒(100),Zymoclean Gel DNA回收试剂盒,60mm培养皿,100mm培养皿,24-MTP,48-MTP,96-MTP,细胞冻存管(康宁);其它化学试剂(Sigma)等。
2.制备方法
1)质粒构建:将NGN2、ISL1、BRN3b及SOX11基因分别构建入慢病毒载体,载体中调控基因表达水平的启动子采用CMV。同时通过IRES序列引入绿色荧光报告基因,以便于确定病毒包装质量和滴度,观察细胞形态的变化,测定细胞纯度及用于后续各种具体应用。
2)病毒包装:将携有上述基因的各质粒与pRSV、pMDLg及pVSV-G按本领域常用比例与转染试剂PEI混合,加入24小时前预种的293T细胞中转染过夜,更换新鲜培养液,24小时后收集含有病毒的上清液并加入新鲜培养液,再24小时后重复收集一次,合并两次病毒液后用0.45μm的滤器过滤除去死细胞及其碎片,加入凝聚胺至终浓度1-12μg/mL,用少量测定病毒滴度,其余储存于4℃冰箱备用。质粒转染效率可以通过随机选择5-10个20x视野,分别统计各视野中的总细胞数以及GFP阳性细胞数,计算各视野GFP阳性细胞比例,然后取平均值而获得。在293T细胞中40小时左右质粒转染效率高达90%,参见附图图1,可以确保获得高滴度的病毒液。
3)皮肤成纤维细胞培养及感染:先用DMEM或PBS按1:50至1:2000间的任何比例稀释Matrigel,并加入0.1-20μg/mL层粘连蛋白,预包被培养皿过夜。包被基质的选择参见附图图5。然后将皮肤成纤维细胞按适当密度预种于培养皿中过夜。在皮肤成纤维细胞培养液中加入适量的携有基因的病毒,混匀后在培养箱中继续培养过夜,将含病毒的培养液直接吸入含有消毒液的废液瓶,在细胞培养皿中沿壁迅速小心加入新鲜的皮肤成纤维细胞培养液。病毒感染率可以通过随机选择5-10个20x视野,分别统计各视野中的总细胞数以及GFP阳性细胞数,计算各视野GFP阳性细胞比例,然后取平均值而获得。通过在幼儿或成年皮肤成纤维细胞中调整病毒用量,可使病毒感染率在48小时左右高达60%以上,参见附图图2,从而确保感染病毒的细胞可高效地转化为背根节神经元。
4)直接诱导转分化:感染48小时后,将培养液直接吸入含有消毒液的废液瓶,在细胞培养皿中沿壁小心加入含有促进转分化的小分子化合物与生长因子的诱导分化培养液,小分子化合物与生长因子的选择参见附图图6。然后间隔1-2天换液。所述诱导分化培养液的组成为:在含有0.5%-2%B27、0.5%-2%N2的DMEM/F12/Neurobasal(1:1:1或2:2:1)基础液中,加入1-20μM FSK、0.1-5μM RA、1-10μM SB431542和0.1-1μM LDN,以及1-200ng/mLbFGF2、NGF、NT3和GDNF。GFP阳性的皮肤成纤维细胞在特定的诱导分化培养液中逐渐发生形态变化,在诱导后第1天一些GFP阳性细胞胞体开始缩小、隆圆,诱导后第二天大部分GFP阳性细胞胞体都明显变化,第3天部分细胞已经开始长出神经突起(如红色箭头所示),形成明显的神经元形态,参见附图图3。
5)背根节神经元的分离纯化:10天左右即可看到大量转化的背根节神经元,在荧光显微镜下观察更为清晰。采用细胞滤器及在明胶包被的培养皿上差异性贴壁进行分离纯化。纯化后的背根节神经元通过细胞计数器和荧光显微镜分别统计获得总细胞数及GFP阳性的神经细胞数目,三次重复计算得出纯度高达95%,转化效率高达90%,参见附图图4。将少量纯化后的背根节神经元接种在预先包被好的培养皿中用背根节神经细胞培养液继续培养以供鉴定。
6)冻存及运输:按照常规细胞冻存方法操作,将背根节神经元按每管50万或100万个细胞冻存于适于神经细胞的专用冻存液备储存、运输。
3.表征
在适宜的时间(如15dpi、20dpi或培养期间其它任何时间),采用4%PFA在室温下固定Matrigel预先包被的盖玻片上培养的背根节神经元10-20分钟后,用含有0.1-0.2%Triton X-100及3-5%BSA的PBS缓冲液封闭约0.5-2小时。然后在同样的缓冲液中稀释待分析特征蛋白质的抗体,将其加入细胞中并于4℃下孵育过夜,洗涤5分钟2-3次后,加入经稀释的带有荧光素的相应二抗,在室温下孵育0.5-1小时,洗涤5分钟2-3次后,再用1μg/mLHoechst33258(HST)室温共染10分钟,洗涤后用载玻片封片处理。采用EVOS荧光显微镜或共聚焦荧光显微镜,分析背根节神经元有无表达一般神经元特征蛋白质(Tuj1及MAP2)、神经突触蛋白质(SYN1)、背根节神经元特征蛋白质(Peripherin、NF200、BRN3a、VGluT1、TrkA)等。抗体来源及稀释度参见表2,分析结果分别参见附图图7(Tuj1)、图8(MAP2)、图9(SYN1)、图10(Peripherin及NF200)、图11(BRN3a)、图12(VGluT1)及图13(TrkA)。上述结果表明,采用实施例1技术制备的背根节神经元不仅表达了一般神经元的特征蛋白质、神经突触蛋白质,还特异性地表达了背根节神经元的特征蛋白质。
实施例2从人胚胎肺成纤维细胞快速、高效地制备高纯度的背根节神经元
1.材料
人胚胎肺成纤维细胞MRC-5购自上海中乔新舟生物科技有限公司(ZQ0006)。其余材料同实施例1(略)。
2.制备方法
1)质粒构建:将NGN2、ISL2、BRN3b及SOX4基因分别构建入逆转录病毒载体,载体中调控基因表达水平的启动子采用CMV。同时通过T2A序列引入绿色荧光报告基因,以便于确定病毒包装质量和滴度,观察细胞形态的变化,测定细胞纯度及用于后续各种具体应用。
2)病毒包装:将携有上述基因的各质粒与pGP及pVSV-G按本领域常用比例与转染试剂Lipofectamine2000混合,加入24小时前预种的293T细胞中转染过夜,更换新鲜培养液,24小时后收集含有病毒的上清液并加入新鲜培养液,再24小时后重复收集一次,合并两次病毒液后用0.45μm的滤器过滤除去死细胞及其碎片,加入凝聚胺至终浓度1-12μg/mL,用少量测定病毒滴度,其余储存于4℃冰箱备用。质粒转染效率可以通过随机选择5-10个20x视野,分别统计各视野中的总细胞数以及GFP阳性细胞数,计算各视野GFP阳性细胞比例,然后取平均值而获得。在293T细胞中50小时左右质粒转染效率高达90%。
3)MRC-5成纤维细胞培养及感染:先用0.1-20μg/mL层粘连蛋白与纤连蛋白预包被培养皿过夜。然后将MRC-5成纤维细胞按适当密度预种于培养皿中过夜。在MRC-5成纤维细胞培养液中加入适量的携有基因的病毒,混匀后在培养箱中继续培养过夜,将含病毒的培养液直接吸入含有消毒液的废液瓶,在细胞培养皿中沿壁迅速小心加入新鲜的MRC-5成纤维细胞培养液。病毒感染率可以通过随机选择5-10个20x视野,分别统计各视野中的总细胞数以及GFP阳性细胞数,计算各视野GFP阳性细胞比例,然后取平均值而获得。通过在MRC-5成纤维细胞中调整病毒用量,可使病毒感染率在48小时左右高达60%。
4)直接诱导转分化:感染48小时后,将培养液直接吸入含有消毒液的废液瓶,在细胞培养皿中沿壁小心加入含有促进转分化的小分子化合物与生长因子的诱导分化培养液。然后间隔1-2天换液。所述诱导分化培养液的组成为:在含有0.5%-2%B27、0.5%-2%N2的DMEM/F12/Neurobasal(1:1:1或2:2:1)基础液中,加入1-20μM FSK和0.1-1μM LDN,以及1-200ng/mL NGF。
5)背根节神经元的分离纯化:10天左右即可看到大量转化的背根节神经元,在荧光显微镜下观察更为清晰。采用细胞滤器及在明胶包被的培养皿上差异性贴壁进行分离纯化。纯化后的背根节神经元通过细胞计数器和荧光显微镜分别统计获得总细胞数及GFP阳性的神经细胞数目,三次重复计算得出纯度高达90%,转化效率高达90%。将少量纯化后的背根节神经元接种在预先包被好的培养皿中用背根节神经细胞培养液继续培养以供鉴定。
3.表征
采用与实施例1中相同的方法,采用EVOS荧光显微镜或共聚焦荧光显微镜,分析制得的背根节神经元有无表达一般神经元特征蛋白质(Tuj1及MAP2)、神经突触蛋白质(SYN1)以及背根节神经元特征蛋白质(Peripherin、NF200、BRN3a、VGluT1、TrkA)等。分析结果同样表明,采用实施例2技术制备的背根节神经元不仅表达了一般神经元的特征蛋白质、神经突触蛋白质,还特异性地表达了背根节神经元的特征蛋白质。
实施例3从人包皮成纤维细胞快速、高效地制备高纯度的背根节神经元
1.材料
人包皮成纤维细胞BJ(CRL-2522)购自美国ATCC公司。其余材料同实施例1(略)。
2.制备方法
1)质粒构建:将NGN1、ASCL1、ISL1、BRN3a及SOX11基因分别构建入慢病毒载体,载体中调控ASCL1基因表达水平的启动子采用CMV,调控其它基因表达水平的启动子采用PGK。同时在ASCL1基因终止密码子前通过T2A序列引入绿色荧光报告基因,以便于确定病毒包装质量和滴度,观察细胞形态的变化,测定细胞纯度及用于后续各种具体应用。
2)病毒包装:将携有上述基因的各质粒与pRSV、pMDLg及pVSV-G按本领域常用比例与转染试剂PEI混合,加入24小时前预种的293T细胞中转染过夜,更换新鲜培养液,24小时后收集含有病毒的上清液并加入新鲜培养液,再24小时后重复收集一次,合并两次病毒液后用0.45μm的滤器过滤除去死细胞及其碎片,加入凝聚胺至终浓度1-12μg/mL,用少量测定病毒滴度,其余储存于4℃冰箱备用。质粒转染效率可以通过随机选择5-10个20x视野,分别统计各视野中的总细胞数以及GFP阳性细胞数,计算各视野GFP阳性细胞比例,然后取平均值而获得。在293T细胞中50小时左右质粒转染效率高达90%。
3)BJ成纤维细胞培养及感染:先用DMEM或PBS按1:50至1:2000间的任何比例稀释Matrigel,预包被培养皿过夜。然后将BJ成纤维细胞按适当密度预种于培养皿中过夜。在BJ成纤维细胞培养液中加入适量的携有基因的病毒,混匀后在培养箱中继续培养过夜,将含病毒的培养液直接吸入含有消毒液的废液瓶,在细胞培养皿中沿壁迅速小心加入新鲜的BJ成纤维细胞培养液。病毒感染率可以通过随机选择5-10个20x视野,分别统计各视野中的总细胞数以及GFP阳性细胞数,计算各视野GFP阳性细胞比例,然后取平均值而获得。通过在BJ成纤维细胞中调整病毒用量,可使病毒感染率在48小时左右高达60%。
4)直接诱导转分化:感染48小时后,将培养液直接吸入含有消毒液的废液瓶,在细胞培养皿中沿壁小心加入含有促进转分化的小分子化合物与生长因子的诱导分化培养液。然后间隔1-2天换液。所述诱导分化培养液的组成为:在含有0.5%-2%B27、0.5%-2%N2的DMEM/F12/Neurobasal(1:1:1或2:2:1)基础液中,加入1-20μM FSK和0.1-1μM LDN,以及1-200ng/mL bFGF2、NGF和GDNF。
5)背根节神经元的分离纯化:10天左右即可看到大量转化的背根节神经元,在荧光显微镜下观察更为清晰。采用细胞滤器及流式细胞仪进行分离纯化。纯化后的背根节神经元通过细胞计数器和荧光显微镜分别统计获得总细胞数及GFP阳性的神经细胞数目,三次重复计算得出纯度高达90%,转化效率高达90%。将少量纯化后的背根节神经元接种在预先包被好的培养皿中用背根节神经细胞培养液继续培养以供鉴定。
3.表征
采用与实施例1中相同的方法,采用EVOS荧光显微镜或共聚焦荧光显微镜,分析制得的背根节神经元有无表达一般神经元特征蛋白质(Tuj1及MAP2)、神经突触蛋白质(SYN1)以及背根节神经元特征蛋白质(Peripherin、NF200、BRN3a、VGluT1、TrkA)等。分析结果同样表明,采用实施例3技术制备的背根节神经元不仅表达了一般神经元的特征蛋白质、神经突触蛋白质,还特异性地表达了背根节神经元的特征蛋白质。
实施例4包被基质的选择研究
一般的细胞培养皿在没有预先包被的情况下对皮肤成纤维细胞的贴壁生长没有明显影响,可是在感染病毒后,细胞会从玻璃介质上脱落,因此应针对所用培养皿选择合适的包被条件以促进细胞在转分化过程中的贴壁生长。重要的是,包被基质的选择对转分化期间诱导生成的神经细胞的贴壁生长、存活至关重要,是提高转化效率的重要前提。
因此,本实施例选择了4种成纤维细胞或神经细胞的包被基质:层粘连蛋白(L)、明胶(G)、纤连蛋白(F)、Matrigel(M),按不同的组合分别加入培养皿中包被过夜,在转分化第10天用荧光显微镜每组分别随机选取5-10个20x视野,统计各视野中GFP阳性的神经细胞数目,然后计算相对于数目最多组的相对转化率以进行对比分析。由图5可见,不含包被基质的实验组(-LGFM)几乎没有背根节神经元生成,而以上4种基质单独包被或以≥2种的组合包被均可以获得不同程度的转化率。在单独包被的情况下,Matrigel相比其它包被基质导致了最高的转化效率。因此,在实际制备过程中可以参考成本、效率等因素选择合适的包被基质。
实施例5诱导分化培养液中小分子化合物和生长因子的选择研究
本实施例考察了不同小分子化合物以及生长因子对转分化效率的影响。按实施例1所述条件进行转分化实验,选择FSK、RA、LDN、SB431542(SB)、CHIR99021(CHIR)等小分子化合物以及bFGF2、NGF、GDNF、NT3等生长因子,按不同组合加入诱导分化培养液中,在第10天用荧光显微镜每组分别随机选取5-10个20x视野,统计各视野中GFP阳性的神经细胞数目,然后计算相对于数目最多组的相对转化率以进行对比分析。由图6可见,在诱导分化培养液中加入以上全部成分(ALL)时转化效率最高,去掉FSK、LDN或bFGF2后对转化效率的影响最大。因此,在实际制备过程中可以参考成本、效率等因素选择合适的小分子化合物及生长因子组合。
实施例6幼儿及成年背根节神经元年龄相关的特征鉴定
1.衰老标记物β-半乳糖苷酶(β-Gal)检测
衰老标记物β-Gal检测试剂盒购自上海碧云天生物技术有限公司(货号C0602)。先将实施例1中制备的幼儿及成年背根节神经元按适当密度接种于Matrigel预包被的圆形细胞爬片上,在24孔板中培养48小时以后,采用该试剂盒提供的特定固定液固定细胞,然后按照试剂盒说明书配制染色反应液,在37℃孵育10小时左右终止反应。在普通光学显微镜下(宁波永新光学股份有限公司,NIB-100)观察并拍照,代表性结果参见附图图14。分析结果表明,与幼儿皮肤细胞转化制备的背根节神经元比较,成年皮肤细胞转化制备的背根节神经细胞中衰老标记物β-Gal染色阳性细胞更多,且大部分阳性细胞染色密度显著增强。
2.端粒保护性抗氧化酶PRDX1及长寿相关异染色质蛋白(HP1γ)表达水平检测
端粒保护性抗氧化酶PRDX1及长寿相关异染色质蛋白(HP1γ)表达水平的检测被认为可以反映细胞的相对年龄特征(2017,Tang,Frontiers in Mol Neurosci)。其检测按照实施例1中的免疫荧光细胞化学染色方法进行。抗体来源及稀释度参见表2,染色代表性结果分别参见附图图14(PRDX1)及图15(HP1γ)。分析结果表明,与幼儿皮肤细胞转化制备的背根节神经元比较,成年皮肤细胞转化制备的背根节神经细胞中端粒保护性抗氧化酶PRDX1及长寿相关异染色质蛋白(HP1γ)表达水平都显著降低。
综合上述年龄相关的特征鉴定结果表明,与幼儿皮肤细胞转化的DRGN比较,成年人皮肤细胞转化的DRGN显示了系列老化相关的特征,提示直接转分化过程并没有出现像iPSC技术一样的年龄逆转,而是保留了源细胞的相应年龄特征。
实施例7背根节神经元在神经痛新药筛选中的应用
先将若干96孔培养板按上述方法预包被过夜,取出一管冻存神经细胞,在水浴中小心快速解冻复苏,按适当密度接种后,把预先准备好的待筛选化合物加入预先设计好的各孔中(应含溶剂对照、阳性对照等),轻轻混匀后,放回细胞培养箱中,培养适当时间后,按照适宜的方法进行定性、定量分析,确定有效化合物。最优活性化合物可以进一步采用背根节神经元来研究其作用机制、明确主要作用靶点、优化结构以改善成药性、并利用作用靶点开发潜在的基因疗法等。
以上所述的具体实施例,对本发明的目的、技术方案和有益效果进行了进一步的详细说明,然而,应当理解的是,以上所述实施例无意于限制本发明的范围。凡在本发明的精神和原则之内所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
序列表
<110> 宁波易赛腾生物科技有限公司
<120> 一种从非神经细胞转化制备保留年龄特征的人源性背根节神经元的方法
<160> 20
<170> SIPOSequenceListing 1.0
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<212> DNA
<213> human NGN1 cDNA
<400> 1
atgccagccc gccttgagac ctgcatctcc gacctcgact gcgccagcag cagcggcagt 60
gacctatccg gcttcctcac cgacgaggaa gactgtgcca gactccaaca ggcagcctcc 120
gcttcggggc cgcccgcgcc ggcccgcagg ggcgcgccca atatctcccg ggcgtctgag 180
gttccagggg cacaggacga cgagcaggag aggcggcggc gccgcggccg gacgcgggtc 240
cgctccgagg cgctgctgca ctcgctgcgc aggagccggc gcgtcaaggc caacgatcgc 300
gagcgcaacc gcatgcacaa cttgaacgcg gccctggacg cactgcgcag cgtgctgccc 360
tcgttccccg acgacaccaa gctcaccaaa atcgagacgc tgcgcttcgc ctacaactac 420
atctgggctc tggccgagac actgcgcctg gcggatcaag ggctgcccgg aggcggtgcc 480
cgggagcgcc tcctgccgcc gcagtgcgtc ccctgcctgc ccggtccccc aagccccgcc 540
agcgacgcgg agtcctgggg ctcaggtgcc gccgccgcct ccccgctctc tgaccccagt 600
agcccagccg cctccgaaga cttcacctac cgccccggcg accctgtttt ctccttccca 660
agcctgccca aagacttgct ccacacaacg ccctgtttca ttccttacca ctag 714
<210> 2
<211> 237
<212> PRT
<213> human NGN1 protein
<400> 2
Met Pro Ala Arg Leu Glu Thr Cys Ile Ser Asp Leu Asp Cys Ala Ser
1 5 10 15
Ser Ser Gly Ser Asp Leu Ser Gly Phe Leu Thr Asp Glu Glu Asp Cys
20 25 30
Ala Arg Leu Gln Gln Ala Ala Ser Ala Ser Gly Pro Pro Ala Pro Ala
35 40 45
Arg Arg Gly Ala Pro Asn Ile Ser Arg Ala Ser Glu Val Pro Gly Ala
50 55 60
Gln Asp Asp Glu Gln Glu Arg Arg Arg Arg Arg Gly Arg Thr Arg Val
65 70 75 80
Arg Ser Glu Ala Leu Leu His Ser Leu Arg Arg Ser Arg Arg Val Lys
85 90 95
Ala Asn Asp Arg Glu Arg Asn Arg Met His Asn Leu Asn Ala Ala Leu
100 105 110
Asp Ala Leu Arg Ser Val Leu Pro Ser Phe Pro Asp Asp Thr Lys Leu
115 120 125
Thr Lys Ile Glu Thr Leu Arg Phe Ala Tyr Asn Tyr Ile Trp Ala Leu
130 135 140
Ala Glu Thr Leu Arg Leu Ala Asp Gln Gly Leu Pro Gly Gly Gly Ala
145 150 155 160
Arg Glu Arg Leu Leu Pro Pro Gln Cys Val Pro Cys Leu Pro Gly Pro
165 170 175
Pro Ser Pro Ala Ser Asp Ala Glu Ser Trp Gly Ser Gly Ala Ala Ala
180 185 190
Ala Ser Pro Leu Ser Asp Pro Ser Ser Pro Ala Ala Ser Glu Asp Phe
195 200 205
Thr Tyr Arg Pro Gly Asp Pro Val Phe Ser Phe Pro Ser Leu Pro Lys
210 215 220
Asp Leu Leu His Thr Thr Pro Cys Phe Ile Pro Tyr His
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<210> 3
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<212> DNA
<213> human NGN2 cDNA
<400> 3
atgttcgtca aatccgagac cttggagttg aaggaggaag aggacgtgtt agtgctgctc 60
ggatcggcct cccccgcctt ggcggccctg accccgctgt catccagcgc cgacgaagaa 120
gaggaggagg agccgggcgc gtcaggcggg gcgcgtcggc agcgcggggc tgaggccggg 180
cagggggcgc ggggcggcgt ggctgcgggt gcggagggct gccggcccgc acggctgctg 240
ggtctggtac acgattgcaa acggcgccct tcccgggcgc gggccgtctc ccgaggcgcc 300
aagacggccg agacggtgca gcgcatcaag aagacccgta gactgaaggc caacaaccgc 360
gagcgaaacc gcatgcacaa cctcaacgcg gcactggacg cgctgcgcga ggtgctcccc 420
acgttccccg aggacgccaa gctcaccaag atcgagaccc tgcgcttcgc ccacaactac 480
atctgggcac tcaccgagac cctgcgcctg gcggatcact gcgggggcgg cggcgggggc 540
ctgccggggg cgctcttctc cgaggcagtg ttgctgagcc cgggaggcgc cagcgccgcc 600
ctgagcagca gcggagacag cccctcgccc gcctccacgt ggagttgcac caacagcccc 660
gcgccgtcct cctccgtgtc ctccaattcc acctccccct acagctgcac tttatcgccc 720
gccagcccgg ccgggtcaga catggactat tggcagcccc cacctcccga caagcaccgc 780
tatgcacctc acctccccat agccagggat tgtatctag 819
<210> 4
<211> 272
<212> PRT
<213> human NGN2 protein
<400> 4
Met Phe Val Lys Ser Glu Thr Leu Glu Leu Lys Glu Glu Glu Asp Val
1 5 10 15
Leu Val Leu Leu Gly Ser Ala Ser Pro Ala Leu Ala Ala Leu Thr Pro
20 25 30
Leu Ser Ser Ser Ala Asp Glu Glu Glu Glu Glu Glu Pro Gly Ala Ser
35 40 45
Gly Gly Ala Arg Arg Gln Arg Gly Ala Glu Ala Gly Gln Gly Ala Arg
50 55 60
Gly Gly Val Ala Ala Gly Ala Glu Gly Cys Arg Pro Ala Arg Leu Leu
65 70 75 80
Gly Leu Val His Asp Cys Lys Arg Arg Pro Ser Arg Ala Arg Ala Val
85 90 95
Ser Arg Gly Ala Lys Thr Ala Glu Thr Val Gln Arg Ile Lys Lys Thr
100 105 110
Arg Arg Leu Lys Ala Asn Asn Arg Glu Arg Asn Arg Met His Asn Leu
115 120 125
Asn Ala Ala Leu Asp Ala Leu Arg Glu Val Leu Pro Thr Phe Pro Glu
130 135 140
Asp Ala Lys Leu Thr Lys Ile Glu Thr Leu Arg Phe Ala His Asn Tyr
145 150 155 160
Ile Trp Ala Leu Thr Glu Thr Leu Arg Leu Ala Asp His Cys Gly Gly
165 170 175
Gly Gly Gly Gly Leu Pro Gly Ala Leu Phe Ser Glu Ala Val Leu Leu
180 185 190
Ser Pro Gly Gly Ala Ser Ala Ala Leu Ser Ser Ser Gly Asp Ser Pro
195 200 205
Ser Pro Ala Ser Thr Trp Ser Cys Thr Asn Ser Pro Ala Pro Ser Ser
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Ser Val Ser Ser Asn Ser Thr Ser Pro Tyr Ser Cys Thr Leu Ser Pro
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Ala Ser Pro Ala Gly Ser Asp Met Asp Tyr Trp Gln Pro Pro Pro Pro
245 250 255
Asp Lys His Arg Tyr Ala Pro His Leu Pro Ile Ala Arg Asp Cys Ile
260 265 270
<210> 5
<211> 711
<212> DNA
<213> human ASCL1 cDNA
<400> 5
atggaaagct ctgccaagat ggagagcggc ggcgccggcc agcagcccca gccgcagccc 60
cagcagccct tcctgccgcc cgcagcctgt ttctttgcca cggccgcagc cgcggcggcc 120
gcagccgccg cagcggcagc gcagagcgcg cagcagcagc agcagcagca gcagcagcag 180
cagcaggcgc cgcagctgag accggcggcc gacggccagc cctcaggggg cggtcacaag 240
tcagcgccca agcaagtcaa gcgacagcgc tcgtcttcgc ccgaactgat gcgctgcaaa 300
cgccggctca acttcagcgg ctttggctac agcctgccgc agcagcagcc ggccgccgtg 360
gcgcgccgca acgagcgcga gcgcaaccgc gtcaagttgg tcaacctggg ctttgccacc 420
cttcgggagc acgtccccaa cggcgcggcc aacaagaaga tgagtaaggt ggagacactg 480
cgctcggcgg tcgagtacat ccgcgcgctg cagcagctgc tggacgagca tgacgcggtg 540
agcgccgcct tccaggcagg cgtcctgtcg cccaccatct cccccaacta ctccaacgac 600
ttgaactcca tggccggctc gccggtctca tcctactcgt cggacgaggg ctcttacgac 660
ccgctcagcc ccgaggagca ggagcttctc gacttcacca actggttctg a 711
<210> 6
<211> 236
<212> PRT
<213> human ASCL1 protein
<400> 6
Met Glu Ser Ser Ala Lys Met Glu Ser Gly Gly Ala Gly Gln Gln Pro
1 5 10 15
Gln Pro Gln Pro Gln Gln Pro Phe Leu Pro Pro Ala Ala Cys Phe Phe
20 25 30
Ala Thr Ala Ala Ala Ala Ala Ala Ala Ala Ala Ala Ala Ala Ala Gln
35 40 45
Ser Ala Gln Gln Gln Gln Gln Gln Gln Gln Gln Gln Gln Gln Ala Pro
50 55 60
Gln Leu Arg Pro Ala Ala Asp Gly Gln Pro Ser Gly Gly Gly His Lys
65 70 75 80
Ser Ala Pro Lys Gln Val Lys Arg Gln Arg Ser Ser Ser Pro Glu Leu
85 90 95
Met Arg Cys Lys Arg Arg Leu Asn Phe Ser Gly Phe Gly Tyr Ser Leu
100 105 110
Pro Gln Gln Gln Pro Ala Ala Val Ala Arg Arg Asn Glu Arg Glu Arg
115 120 125
Asn Arg Val Lys Leu Val Asn Leu Gly Phe Ala Thr Leu Arg Glu His
130 135 140
Val Pro Asn Gly Ala Ala Asn Lys Lys Met Ser Lys Val Glu Thr Leu
145 150 155 160
Arg Ser Ala Val Glu Tyr Ile Arg Ala Leu Gln Gln Leu Leu Asp Glu
165 170 175
His Asp Ala Val Ser Ala Ala Phe Gln Ala Gly Val Leu Ser Pro Thr
180 185 190
Ile Ser Pro Asn Tyr Ser Asn Asp Leu Asn Ser Met Ala Gly Ser Pro
195 200 205
Val Ser Ser Tyr Ser Ser Asp Glu Gly Ser Tyr Asp Pro Leu Ser Pro
210 215 220
Glu Glu Gln Glu Leu Leu Asp Phe Thr Asn Trp Phe
225 230 235
<210> 7
<211> 1425
<212> DNA
<213> human SOX4 cDNA
<400> 7
atggtgcagc aaaccaacaa tgccgagaac acggaagcgc tgctggccgg cgagagctcg 60
gactcgggcg ccggcctcga gctgggaatc gcctcctccc ccacgcccgg ctccaccgcc 120
tccacgggcg gcaaggccga cgacccgagc tggtgcaaga ccccgagtgg gcacatcaag 180
cgacccatga acgccttcat ggtgtggtcg cagatcgagc ggcgcaagat catggagcag 240
tcgcccgaca tgcacaacgc cgagatctcc aagcggctgg gcaaacgctg gaagctgctc 300
aaagacagcg acaagatccc tttcattcga gaggcggagc ggctgcgcct caagcacatg 360
gctgactacc ccgactacaa gtaccggccc aggaagaagg tgaagtccgg caacgccaac 420
tccagctcct cggccgccgc ctcctccaag ccgggggaga agggagacaa ggtcggtggc 480
agtggcgggg gcggccatgg gggcggcggc ggcggcggga gcagcaacgc ggggggagga 540
ggcggcggtg cgagtggcgg cggcgccaac tccaaaccgg cgcagaaaaa gagctgcggc 600
tccaaagtgg cgggcggcgc gggcggtggg gttagcaaac cgcacgccaa gctcatcctg 660
gcaggcggcg gcggcggcgg gaaagcagcg gctgccgccg ccgcctcctt cgccgccgaa 720
caggcggggg ccgccgccct gctgcccctg ggcgccgccg ccgaccacca ctcgctgtac 780
aaggcgcgga ctcccagcgc ctcggcctcc gcctcctcgg cagcctcggc ctccgcagcg 840
ctcgcggccc cgggcaagca cctggcggag aagaaggtga agcgcgtcta cctgttcggc 900
ggcctgggca cgtcgtcgtc gcccgtgggc ggcgtgggcg cgggagccga ccccagcgac 960
cccctgggcc tgtacgagga ggagggcgcg ggctgctcgc ccgacgcgcc cagcctgagc 1020
ggccgcagca gcgccgcctc gtcccccgcc gccggccgct cgcccgccga ccaccgcggc 1080
tacgccagcc tgcgcgccgc ctcgcccgcc ccgtccagcg cgccctcgca cgcgtcctcc 1140
tcggcctcgt cccactcctc ctcttcctcc tcctcgggct cctcgtcctc cgacgacgag 1200
ttcgaagacg acctgctcga cctgaacccc agctcaaact ttgagagcat gtccctgggc 1260
agcttcagtt cgtcgtcggc gctcgaccgg gacctggatt ttaacttcga gcccggctcc 1320
ggctcgcact tcgagttccc ggactactgc acgcccgagg tgagcgagat gatctcggga 1380
gactggctcg agtccagcat ctccaacctg gttttcacct actaa 1425
<210> 8
<211> 474
<212> PRT
<213> human SOX4 protein
<400> 8
Met Val Gln Gln Thr Asn Asn Ala Glu Asn Thr Glu Ala Leu Leu Ala
1 5 10 15
Gly Glu Ser Ser Asp Ser Gly Ala Gly Leu Glu Leu Gly Ile Ala Ser
20 25 30
Ser Pro Thr Pro Gly Ser Thr Ala Ser Thr Gly Gly Lys Ala Asp Asp
35 40 45
Pro Ser Trp Cys Lys Thr Pro Ser Gly His Ile Lys Arg Pro Met Asn
50 55 60
Ala Phe Met Val Trp Ser Gln Ile Glu Arg Arg Lys Ile Met Glu Gln
65 70 75 80
Ser Pro Asp Met His Asn Ala Glu Ile Ser Lys Arg Leu Gly Lys Arg
85 90 95
Trp Lys Leu Leu Lys Asp Ser Asp Lys Ile Pro Phe Ile Arg Glu Ala
100 105 110
Glu Arg Leu Arg Leu Lys His Met Ala Asp Tyr Pro Asp Tyr Lys Tyr
115 120 125
Arg Pro Arg Lys Lys Val Lys Ser Gly Asn Ala Asn Ser Ser Ser Ser
130 135 140
Ala Ala Ala Ser Ser Lys Pro Gly Glu Lys Gly Asp Lys Val Gly Gly
145 150 155 160
Ser Gly Gly Gly Gly His Gly Gly Gly Gly Gly Gly Gly Ser Ser Asn
165 170 175
Ala Gly Gly Gly Gly Gly Gly Ala Ser Gly Gly Gly Ala Asn Ser Lys
180 185 190
Pro Ala Gln Lys Lys Ser Cys Gly Ser Lys Val Ala Gly Gly Ala Gly
195 200 205
Gly Gly Val Ser Lys Pro His Ala Lys Leu Ile Leu Ala Gly Gly Gly
210 215 220
Gly Gly Gly Lys Ala Ala Ala Ala Ala Ala Ala Ser Phe Ala Ala Glu
225 230 235 240
Gln Ala Gly Ala Ala Ala Leu Leu Pro Leu Gly Ala Ala Ala Asp His
245 250 255
His Ser Leu Tyr Lys Ala Arg Thr Pro Ser Ala Ser Ala Ser Ala Ser
260 265 270
Ser Ala Ala Ser Ala Ser Ala Ala Leu Ala Ala Pro Gly Lys His Leu
275 280 285
Ala Glu Lys Lys Val Lys Arg Val Tyr Leu Phe Gly Gly Leu Gly Thr
290 295 300
Ser Ser Ser Pro Val Gly Gly Val Gly Ala Gly Ala Asp Pro Ser Asp
305 310 315 320
Pro Leu Gly Leu Tyr Glu Glu Glu Gly Ala Gly Cys Ser Pro Asp Ala
325 330 335
Pro Ser Leu Ser Gly Arg Ser Ser Ala Ala Ser Ser Pro Ala Ala Gly
340 345 350
Arg Ser Pro Ala Asp His Arg Gly Tyr Ala Ser Leu Arg Ala Ala Ser
355 360 365
Pro Ala Pro Ser Ser Ala Pro Ser His Ala Ser Ser Ser Ala Ser Ser
370 375 380
His Ser Ser Ser Ser Ser Ser Ser Gly Ser Ser Ser Ser Asp Asp Glu
385 390 395 400
Phe Glu Asp Asp Leu Leu Asp Leu Asn Pro Ser Ser Asn Phe Glu Ser
405 410 415
Met Ser Leu Gly Ser Phe Ser Ser Ser Ser Ala Leu Asp Arg Asp Leu
420 425 430
Asp Phe Asn Phe Glu Pro Gly Ser Gly Ser His Phe Glu Phe Pro Asp
435 440 445
Tyr Cys Thr Pro Glu Val Ser Glu Met Ile Ser Gly Asp Trp Leu Glu
450 455 460
Ser Ser Ile Ser Asn Leu Val Phe Thr Tyr
465 470
<210> 9
<211> 1326
<212> DNA
<213> human SOX11 cDNA
<400> 9
atggtgcagc aggcggagag cttggaagcg gagagcaacc tgccccggga ggcgctggac 60
acggaggagg gcgaattcat ggcttgcagc ccggtggccc tggacgagag cgacccagac 120
tggtgcaaga cggcgtcggg ccacatcaag cggccgatga acgcgttcat ggtatggtcc 180
aagatcgaac gcaggaagat catggagcag tctccggaca tgcacaacgc cgagatctcc 240
aagaggctgg gcaagcgctg gaaaatgctg aaggacagcg agaagatccc gttcatccgg 300
gaggcggagc ggctgcggct caagcacatg gccgactacc ccgactacaa gtaccggccc 360
cggaaaaagc ccaaaatgga cccctcggcc aagcccagcg ccagccagag cccagagaag 420
agcgcggccg gcggcggcgg cgggagcgcg ggcggaggcg cgggcggtgc caagacctcc 480
aagggctcca gcaagaaatg cggcaagctc aaggcccccg cggccgcggg cgccaaggcg 540
ggcgcgggca aggcggccca gtccggggac tacgggggcg cgggcgacga ctacgtgctg 600
ggcagcctgc gcgtgagcgg ctcgggcggc ggcggcgcgg gcaagacggt caagtgcgtg 660
tttctggatg aggacgacga cgacgacgac gacgacgacg agctgcagct gcagatcaaa 720
caggagccgg acgaggagga cgaggaacca ccgcaccagc agctcctgca gccgccgggg 780
cagcagccgt cgcagctgct gagacgctac aacgtcgcca aagtgcccgc cagccctacg 840
ctgagcagct cggcggagtc ccccgaggga gcgagcctct acgacgaggt gcgggccggc 900
gcgacctcgg gcgccggggg cggcagccgc ctctactaca gcttcaagaa catcaccaag 960
cagcacccgc cgccgctcgc gcagcccgcg ctgtcgcccg cgtcctcgcg ctcggtgtcc 1020
acctcctcgt ccagcagcag cggcagcagc agcggcagca gcggcgagga cgccgacgac 1080
ctgatgttcg acctgagctt gaatttctct caaagcgcgc acagcgccag cgagcagcag 1140
ctggggggcg gcgcggcggc cgggaacctg tccctgtcgc tggtggataa ggatttggat 1200
tcgttcagcg agggcagcct gggctcccac ttcgagttcc ccgactactg cacgccggag 1260
ctgagcgaga tgatcgcggg ggactggctg gaggcgaact tctccgacct ggtgttcaca 1320
tattga 1326
<210> 10
<211> 441
<212> PRT
<213> human SOX11 protein
<400> 10
Met Val Gln Gln Ala Glu Ser Leu Glu Ala Glu Ser Asn Leu Pro Arg
1 5 10 15
Glu Ala Leu Asp Thr Glu Glu Gly Glu Phe Met Ala Cys Ser Pro Val
20 25 30
Ala Leu Asp Glu Ser Asp Pro Asp Trp Cys Lys Thr Ala Ser Gly His
35 40 45
Ile Lys Arg Pro Met Asn Ala Phe Met Val Trp Ser Lys Ile Glu Arg
50 55 60
Arg Lys Ile Met Glu Gln Ser Pro Asp Met His Asn Ala Glu Ile Ser
65 70 75 80
Lys Arg Leu Gly Lys Arg Trp Lys Met Leu Lys Asp Ser Glu Lys Ile
85 90 95
Pro Phe Ile Arg Glu Ala Glu Arg Leu Arg Leu Lys His Met Ala Asp
100 105 110
Tyr Pro Asp Tyr Lys Tyr Arg Pro Arg Lys Lys Pro Lys Met Asp Pro
115 120 125
Ser Ala Lys Pro Ser Ala Ser Gln Ser Pro Glu Lys Ser Ala Ala Gly
130 135 140
Gly Gly Gly Gly Ser Ala Gly Gly Gly Ala Gly Gly Ala Lys Thr Ser
145 150 155 160
Lys Gly Ser Ser Lys Lys Cys Gly Lys Leu Lys Ala Pro Ala Ala Ala
165 170 175
Gly Ala Lys Ala Gly Ala Gly Lys Ala Ala Gln Ser Gly Asp Tyr Gly
180 185 190
Gly Ala Gly Asp Asp Tyr Val Leu Gly Ser Leu Arg Val Ser Gly Ser
195 200 205
Gly Gly Gly Gly Ala Gly Lys Thr Val Lys Cys Val Phe Leu Asp Glu
210 215 220
Asp Asp Asp Asp Asp Asp Asp Asp Asp Glu Leu Gln Leu Gln Ile Lys
225 230 235 240
Gln Glu Pro Asp Glu Glu Asp Glu Glu Pro Pro His Gln Gln Leu Leu
245 250 255
Gln Pro Pro Gly Gln Gln Pro Ser Gln Leu Leu Arg Arg Tyr Asn Val
260 265 270
Ala Lys Val Pro Ala Ser Pro Thr Leu Ser Ser Ser Ala Glu Ser Pro
275 280 285
Glu Gly Ala Ser Leu Tyr Asp Glu Val Arg Ala Gly Ala Thr Ser Gly
290 295 300
Ala Gly Gly Gly Ser Arg Leu Tyr Tyr Ser Phe Lys Asn Ile Thr Lys
305 310 315 320
Gln His Pro Pro Pro Leu Ala Gln Pro Ala Leu Ser Pro Ala Ser Ser
325 330 335
Arg Ser Val Ser Thr Ser Ser Ser Ser Ser Ser Gly Ser Ser Ser Gly
340 345 350
Ser Ser Gly Glu Asp Ala Asp Asp Leu Met Phe Asp Leu Ser Leu Asn
355 360 365
Phe Ser Gln Ser Ala His Ser Ala Ser Glu Gln Gln Leu Gly Gly Gly
370 375 380
Ala Ala Ala Gly Asn Leu Ser Leu Ser Leu Val Asp Lys Asp Leu Asp
385 390 395 400
Ser Phe Ser Glu Gly Ser Leu Gly Ser His Phe Glu Phe Pro Asp Tyr
405 410 415
Cys Thr Pro Glu Leu Ser Glu Met Ile Ala Gly Asp Trp Leu Glu Ala
420 425 430
Asn Phe Ser Asp Leu Val Phe Thr Tyr
435 440
<210> 11
<211> 1050
<212> DNA
<213> human ISL1 cDNA
<400> 11
atgggagaca tgggagatcc accaaaaaaa aaacgtctga tttccctatg tgttggttgc 60
ggcaatcaga ttcacgatca gtatattctg agggtttctc cggatttgga atggcatgcg 120
gcatgtttga aatgtgcgga gtgtaatcag tatttggacg agagctgtac atgctttgtt 180
agggatggga aaacctactg taaaagagat tatatcaggt tgtacgggat caaatgcgcc 240
aagtgcagca tcggcttcag caagaacgac ttcgtgatgc gtgcccgctc caaggtgtat 300
cacatcgagt gtttccgctg tgtggcctgc agccgccagc tcatccctgg ggacgaattt 360
gcgcttcggg aggacggtct cttctgccga gcagaccacg atgtggtgga gagggccagt 420
ctaggcgctg gcgacccgct cagtcccctg catccagcgc ggccactgca aatggcagcg 480
gagcccatct ccgccaggca gccggccctg cggccccacg tccacaagca gccggagaag 540
accacccgcg tgcggactgt gctgaacgag aagcagctgc acaccttgcg gacctgctac 600
gccgcaaacc cgcggccaga tgcgctcatg aaggagcaac tggtagagat gacgggcctc 660
agtccccgtg tgatccgggt ctggtttcaa aacaagcggt gcaaggacaa gaagcgaagc 720
atcatgatga agcaactcca gcagcagcag cccaatgaca aaactaatat ccaggggatg 780
acaggaactc ccatggtggc tgccagtcca gagagacacg acggtggctt acaggctaac 840
ccagtggaag tacaaagtta ccagccacct tggaaagtac tgagcgactt cgccttgcag 900
agtgacatag atcagcctgc ttttcagcaa ctggtcaatt tttcagaagg aggaccgggc 960
tctaattcca ctggcagtga agtagcatca atgtcctctc aacttccaga tacacctaac 1020
agcatggtag ccagtcctat tgaggcatga 1050
<210> 12
<211> 349
<212> PRT
<213> human ISL1 protein
<400> 12
Met Gly Asp Met Gly Asp Pro Pro Lys Lys Lys Arg Leu Ile Ser Leu
1 5 10 15
Cys Val Gly Cys Gly Asn Gln Ile His Asp Gln Tyr Ile Leu Arg Val
20 25 30
Ser Pro Asp Leu Glu Trp His Ala Ala Cys Leu Lys Cys Ala Glu Cys
35 40 45
Asn Gln Tyr Leu Asp Glu Ser Cys Thr Cys Phe Val Arg Asp Gly Lys
50 55 60
Thr Tyr Cys Lys Arg Asp Tyr Ile Arg Leu Tyr Gly Ile Lys Cys Ala
65 70 75 80
Lys Cys Ser Ile Gly Phe Ser Lys Asn Asp Phe Val Met Arg Ala Arg
85 90 95
Ser Lys Val Tyr His Ile Glu Cys Phe Arg Cys Val Ala Cys Ser Arg
100 105 110
Gln Leu Ile Pro Gly Asp Glu Phe Ala Leu Arg Glu Asp Gly Leu Phe
115 120 125
Cys Arg Ala Asp His Asp Val Val Glu Arg Ala Ser Leu Gly Ala Gly
130 135 140
Asp Pro Leu Ser Pro Leu His Pro Ala Arg Pro Leu Gln Met Ala Ala
145 150 155 160
Glu Pro Ile Ser Ala Arg Gln Pro Ala Leu Arg Pro His Val His Lys
165 170 175
Gln Pro Glu Lys Thr Thr Arg Val Arg Thr Val Leu Asn Glu Lys Gln
180 185 190
Leu His Thr Leu Arg Thr Cys Tyr Ala Ala Asn Pro Arg Pro Asp Ala
195 200 205
Leu Met Lys Glu Gln Leu Val Glu Met Thr Gly Leu Ser Pro Arg Val
210 215 220
Ile Arg Val Trp Phe Gln Asn Lys Arg Cys Lys Asp Lys Lys Arg Ser
225 230 235 240
Ile Met Met Lys Gln Leu Gln Gln Gln Gln Pro Asn Asp Lys Thr Asn
245 250 255
Ile Gln Gly Met Thr Gly Thr Pro Met Val Ala Ala Ser Pro Glu Arg
260 265 270
His Asp Gly Gly Leu Gln Ala Asn Pro Val Glu Val Gln Ser Tyr Gln
275 280 285
Pro Pro Trp Lys Val Leu Ser Asp Phe Ala Leu Gln Ser Asp Ile Asp
290 295 300
Gln Pro Ala Phe Gln Gln Leu Val Asn Phe Ser Glu Gly Gly Pro Gly
305 310 315 320
Ser Asn Ser Thr Gly Ser Glu Val Ala Ser Met Ser Ser Gln Leu Pro
325 330 335
Asp Thr Pro Asn Ser Met Val Ala Ser Pro Ile Glu Ala
340 345
<210> 13
<211> 1080
<212> DNA
<213> human ISL2 cDNA
<400> 13
atggtggata ttatttttca ttatcctttt ctgggtgcta tgggtgatca ttccaagaag 60
aagcccggga cggccatgtg cgtgggctgc gggagtcaga tccacgacca gtttatcctg 120
cgggtgtcgc ccgacctcga gtggcacgcg gcctgcctca agtgtgccga gtgcagccag 180
tacctggacg agacgtgcac gtgcttcgtg agagacggga agacctactg caagcgggac 240
tatgtcaggc tgttcggcat caagtgcgcc aagtgccagg tgggcttcag cagcagcgac 300
ctggtgatga gggcgcggga cagcgtgtac cacatcgagt gcttccgctg ctccgtgtgc 360
agccgccagc tgctgcctgg ggacgagttc tcgctgcggg agcacgagct gctctgccgc 420
gccgaccacg gcctcctgct cgagcgcgcc gcggccggca gcccgcgcag ccccggcccg 480
cttcccggcg cccgcggcct gcatctgccc gacgctgggt cgggccggca gcccgcgttg 540
cgcccgcacg tgcacaagca gacggagaag acgacccgcg tgcggactgt gctgaacgag 600
aagcagctgc acactctgcg gacctgctac gccgccaacc cgcggcccga cgctctcatg 660
aaggagcagc tggtggagat gaccggcctg agcccgcggg tcatccgcgt ctggttccag 720
aacaagcgct gcaaggacaa gaagaaatcc attctcatga agcagctgca gcagcagcag 780
cacagcgaca agacgagcct tcagggactg actgggacgc ccctggtggc gggcagtccc 840
atccgccatg agaacgccgt gcagggcagc gcagtggagg tgcagacgta ccagccgccg 900
tggaaggcgc tcagcgagtt tgccctccag agcgacctgg accaacccgc cttccaacag 960
ctggtctcct tctccgagtc cggctcccta ggcaactcct ccggcagcga cgtgacctcc 1020
ctgtcctcgc agctcccgga cacccccaac agtatggtgc cgagtcccgt ggagacgtga 1080
<210> 14
<211> 359
<212> PRT
<213> human ISL2 protein
<400> 14
Met Val Asp Ile Ile Phe His Tyr Pro Phe Leu Gly Ala Met Gly Asp
1 5 10 15
His Ser Lys Lys Lys Pro Gly Thr Ala Met Cys Val Gly Cys Gly Ser
20 25 30
Gln Ile His Asp Gln Phe Ile Leu Arg Val Ser Pro Asp Leu Glu Trp
35 40 45
His Ala Ala Cys Leu Lys Cys Ala Glu Cys Ser Gln Tyr Leu Asp Glu
50 55 60
Thr Cys Thr Cys Phe Val Arg Asp Gly Lys Thr Tyr Cys Lys Arg Asp
65 70 75 80
Tyr Val Arg Leu Phe Gly Ile Lys Cys Ala Lys Cys Gln Val Gly Phe
85 90 95
Ser Ser Ser Asp Leu Val Met Arg Ala Arg Asp Ser Val Tyr His Ile
100 105 110
Glu Cys Phe Arg Cys Ser Val Cys Ser Arg Gln Leu Leu Pro Gly Asp
115 120 125
Glu Phe Ser Leu Arg Glu His Glu Leu Leu Cys Arg Ala Asp His Gly
130 135 140
Leu Leu Leu Glu Arg Ala Ala Ala Gly Ser Pro Arg Ser Pro Gly Pro
145 150 155 160
Leu Pro Gly Ala Arg Gly Leu His Leu Pro Asp Ala Gly Ser Gly Arg
165 170 175
Gln Pro Ala Leu Arg Pro His Val His Lys Gln Thr Glu Lys Thr Thr
180 185 190
Arg Val Arg Thr Val Leu Asn Glu Lys Gln Leu His Thr Leu Arg Thr
195 200 205
Cys Tyr Ala Ala Asn Pro Arg Pro Asp Ala Leu Met Lys Glu Gln Leu
210 215 220
Val Glu Met Thr Gly Leu Ser Pro Arg Val Ile Arg Val Trp Phe Gln
225 230 235 240
Asn Lys Arg Cys Lys Asp Lys Lys Lys Ser Ile Leu Met Lys Gln Leu
245 250 255
Gln Gln Gln Gln His Ser Asp Lys Thr Ser Leu Gln Gly Leu Thr Gly
260 265 270
Thr Pro Leu Val Ala Gly Ser Pro Ile Arg His Glu Asn Ala Val Gln
275 280 285
Gly Ser Ala Val Glu Val Gln Thr Tyr Gln Pro Pro Trp Lys Ala Leu
290 295 300
Ser Glu Phe Ala Leu Gln Ser Asp Leu Asp Gln Pro Ala Phe Gln Gln
305 310 315 320
Leu Val Ser Phe Ser Glu Ser Gly Ser Leu Gly Asn Ser Ser Gly Ser
325 330 335
Asp Val Thr Ser Leu Ser Ser Gln Leu Pro Asp Thr Pro Asn Ser Met
340 345 350
Val Pro Ser Pro Val Glu Thr
355
<210> 15
<211> 1260
<212> DNA
<213> human BRN3a cDNA
<400> 15
atgatgtcca tgaacagcaa gcagcctcac tttgccatgc atcccaccct ccctgagcac 60
aagtacccgt cgctgcactc cagctccgag gccatccggc gggcctgcct gcccacgccg 120
ccgctgcaga gcaacctctt cgccagcctg gacgagacgc tgctggcgcg ggccgaggcg 180
ctggcggccg tggacatcgc cgtgtcccag ggcaagagcc atcctttcaa gccggacgcc 240
acgtaccaca cgatgaacag cgtgccgtgc acgtccactt ccacggtgcc tctggcgcac 300
caccaccacc accaccacca ccaccaggcg ctcgaacccg gcgatctgct ggaccacatc 360
tcctcgccgt cgctcgcgct catggccggc gcgggcggcg cgggcgcggc ggccggcggc 420
ggcggcgccc acgacggccc ggggggcggt ggcggcccgg gcggcggcgg cggcccgggc 480
ggcggccccg ggggaggcgg cggtggcggc ccggggggcg gcggcggcgg cccgggcggc 540
gggctcctgg gcggctccgc gcaccctcac ccgcatatgc acagcctggg ccacctgtcg 600
caccccgcgg cggcggccgc catgaacatg ccgtccgggc tgccgcaccc cgggctggtg 660
gcggcggcgg cgcaccacgg cgcggcagcg gcagcggcgg cggcggcggc cgggcaggtg 720
gcagcggcat cggcggcggc ggccgtggtg ggcgcagcgg gcctggcgtc catctgcgac 780
tcggacacgg acccgcgcga gctcgaggcg ttcgcggagc gcttcaagca gcggcgcatc 840
aagctgggcg tgacgcaggc cgacgtgggc tcggcgctgg ccaacctcaa gatcccgggc 900
gtgggctcac tcagccagag caccatctgc aggttcgagt cgctcacgct ctcgcacaac 960
aacatgatcg cgctcaagcc catcctgcag gcgtggctcg aggaggccga gggcgcccag 1020
cgcgagaaaa tgaacaagcc tgagctcttc aacggcggcg agaagaagcg caagcggact 1080
tccatcgccg cgcccgagaa gcgctccctc gaggcctact tcgccgtgca gccccggccc 1140
tcgtccgaga agatcgccgc catcgccgag aaactggacc tcaaaaagaa cgtggtgcgg 1200
gtgtggtttt gcaaccagag acagaagcag aagcggatga aattctctgc cacttactga 1260
<210> 16
<211> 419
<212> PRT
<213> human BRN3a protein
<400> 16
Met Met Ser Met Asn Ser Lys Gln Pro His Phe Ala Met His Pro Thr
1 5 10 15
Leu Pro Glu His Lys Tyr Pro Ser Leu His Ser Ser Ser Glu Ala Ile
20 25 30
Arg Arg Ala Cys Leu Pro Thr Pro Pro Leu Gln Ser Asn Leu Phe Ala
35 40 45
Ser Leu Asp Glu Thr Leu Leu Ala Arg Ala Glu Ala Leu Ala Ala Val
50 55 60
Asp Ile Ala Val Ser Gln Gly Lys Ser His Pro Phe Lys Pro Asp Ala
65 70 75 80
Thr Tyr His Thr Met Asn Ser Val Pro Cys Thr Ser Thr Ser Thr Val
85 90 95
Pro Leu Ala His His His His His His His His His Gln Ala Leu Glu
100 105 110
Pro Gly Asp Leu Leu Asp His Ile Ser Ser Pro Ser Leu Ala Leu Met
115 120 125
Ala Gly Ala Gly Gly Ala Gly Ala Ala Ala Gly Gly Gly Gly Ala His
130 135 140
Asp Gly Pro Gly Gly Gly Gly Gly Pro Gly Gly Gly Gly Gly Pro Gly
145 150 155 160
Gly Gly Pro Gly Gly Gly Gly Gly Gly Gly Pro Gly Gly Gly Gly Gly
165 170 175
Gly Pro Gly Gly Gly Leu Leu Gly Gly Ser Ala His Pro His Pro His
180 185 190
Met His Ser Leu Gly His Leu Ser His Pro Ala Ala Ala Ala Ala Met
195 200 205
Asn Met Pro Ser Gly Leu Pro His Pro Gly Leu Val Ala Ala Ala Ala
210 215 220
His His Gly Ala Ala Ala Ala Ala Ala Ala Ala Ala Ala Gly Gln Val
225 230 235 240
Ala Ala Ala Ser Ala Ala Ala Ala Val Val Gly Ala Ala Gly Leu Ala
245 250 255
Ser Ile Cys Asp Ser Asp Thr Asp Pro Arg Glu Leu Glu Ala Phe Ala
260 265 270
Glu Arg Phe Lys Gln Arg Arg Ile Lys Leu Gly Val Thr Gln Ala Asp
275 280 285
Val Gly Ser Ala Leu Ala Asn Leu Lys Ile Pro Gly Val Gly Ser Leu
290 295 300
Ser Gln Ser Thr Ile Cys Arg Phe Glu Ser Leu Thr Leu Ser His Asn
305 310 315 320
Asn Met Ile Ala Leu Lys Pro Ile Leu Gln Ala Trp Leu Glu Glu Ala
325 330 335
Glu Gly Ala Gln Arg Glu Lys Met Asn Lys Pro Glu Leu Phe Asn Gly
340 345 350
Gly Glu Lys Lys Arg Lys Arg Thr Ser Ile Ala Ala Pro Glu Lys Arg
355 360 365
Ser Leu Glu Ala Tyr Phe Ala Val Gln Pro Arg Pro Ser Ser Glu Lys
370 375 380
Ile Ala Ala Ile Ala Glu Lys Leu Asp Leu Lys Lys Asn Val Val Arg
385 390 395 400
Val Trp Phe Cys Asn Gln Arg Gln Lys Gln Lys Arg Met Lys Phe Ser
405 410 415
Ala Thr Tyr
<210> 17
<211> 1221
<212> DNA
<213> human BRN3b cDNA
<400> 17
atgatgatga tgtccctgaa cagcaagcag gcgtttagca tgccgcacgg cggcagcctg 60
cacgtggagc ccaagtactc ggcactgcac agcacctcgc cgggctcctc ggctcccacc 120
gcgccctcgg ccagctcccc cagcagctcg agcaacgctg gtggtggcgg cggcggcggc 180
ggcggcggcg gaggccgaag cagcagctcc agcagcagtg gcagcagcgg cggcgggggc 240
tcggaggcta tgcggagagc ctgtcttcca accccaccga gcaatatatt cggcgggctg 300
gatgagagtc tgctggcccg cgccgaggct ctggcagccg tggacatcgt ctcccagagc 360
aagagccacc accaccatcc accccaccac agccccttca aaccggacgc cacctaccac 420
actatgaata ccatcccgtg cacgtcggcc gcctcttctt catcggtgcc catctcgcac 480
ccttccgcgt tggcgggcac gcaccaccac caccaccatc accaccacca ccaccaccaa 540
ccgcaccagg cgctggaggg cgagctgctg gagcacctga gtcccgggct ggccctgggc 600
gctatggcgg gccccgacgg cgctgtggtg tccacgccgg ctcacgcgcc gcacatggcc 660
accatgaacc ccatgcacca agcagcgctc agcatggccc acgcgcacgg gctgccgtca 720
cacatgggct gcatgagcga cgtggacgcc gacccgcggg acctggaggc attcgccgag 780
cgcttcaagc agcgacgcat caagctgggg gtgacccagg cagatgtggg ctccgcgctg 840
gccaacctca agatccccgg cgtgggctcg cttagccaga gcaccatctg caggttcgag 900
tccctcacac tgtcgcacaa taatatgatc gcgctcaaac ccatcctgca ggcatggctc 960
gaggaggccg agaagtccca ccgcgagaag ctcaccaagc ctgaactctt caatggcgcg 1020
gagaagaagc gcaagcgcac gtccatcgct gcgccagaga agcgctcgct cgaagcctac 1080
tttgccattc agcctcggcc ctcctctgaa aagatcgccg ccatcgcgga gaagctggac 1140
ctgaagaaaa acgtggtgcg cgtctggttc tgcaaccaga ggcagaaaca gaaaagaatg 1200
aaatattccg ccggcattta g 1221
<210> 18
<211> 406
<212> PRT
<213> human BRN3b protein
<400> 18
Met Met Met Met Ser Leu Asn Ser Lys Gln Ala Phe Ser Met Pro His
1 5 10 15
Gly Gly Ser Leu His Val Glu Pro Lys Tyr Ser Ala Leu His Ser Thr
20 25 30
Ser Pro Gly Ser Ser Ala Pro Thr Ala Pro Ser Ala Ser Ser Pro Ser
35 40 45
Ser Ser Ser Asn Ala Gly Gly Gly Gly Gly Gly Gly Gly Gly Gly Gly
50 55 60
Gly Arg Ser Ser Ser Ser Ser Ser Ser Gly Ser Ser Gly Gly Gly Gly
65 70 75 80
Ser Glu Ala Met Arg Arg Ala Cys Leu Pro Thr Pro Pro Ser Asn Ile
85 90 95
Phe Gly Gly Leu Asp Glu Ser Leu Leu Ala Arg Ala Glu Ala Leu Ala
100 105 110
Ala Val Asp Ile Val Ser Gln Ser Lys Ser His His His His Pro Pro
115 120 125
His His Ser Pro Phe Lys Pro Asp Ala Thr Tyr His Thr Met Asn Thr
130 135 140
Ile Pro Cys Thr Ser Ala Ala Ser Ser Ser Ser Val Pro Ile Ser His
145 150 155 160
Pro Ser Ala Leu Ala Gly Thr His His His His His His His His His
165 170 175
His His His Gln Pro His Gln Ala Leu Glu Gly Glu Leu Leu Glu His
180 185 190
Leu Ser Pro Gly Leu Ala Leu Gly Ala Met Ala Gly Pro Asp Gly Ala
195 200 205
Val Val Ser Thr Pro Ala His Ala Pro His Met Ala Thr Met Asn Pro
210 215 220
Met His Gln Ala Ala Leu Ser Met Ala His Ala His Gly Leu Pro Ser
225 230 235 240
His Met Gly Cys Met Ser Asp Val Asp Ala Asp Pro Arg Asp Leu Glu
245 250 255
Ala Phe Ala Glu Arg Phe Lys Gln Arg Arg Ile Lys Leu Gly Val Thr
260 265 270
Gln Ala Asp Val Gly Ser Ala Leu Ala Asn Leu Lys Ile Pro Gly Val
275 280 285
Gly Ser Leu Ser Gln Ser Thr Ile Cys Arg Phe Glu Ser Leu Thr Leu
290 295 300
Ser His Asn Asn Met Ile Ala Leu Lys Pro Ile Leu Gln Ala Trp Leu
305 310 315 320
Glu Glu Ala Glu Lys Ser His Arg Glu Lys Leu Thr Lys Pro Glu Leu
325 330 335
Phe Asn Gly Ala Glu Lys Lys Arg Lys Arg Thr Ser Ile Ala Ala Pro
340 345 350
Glu Lys Arg Ser Leu Glu Ala Tyr Phe Ala Ile Gln Pro Arg Pro Ser
355 360 365
Ser Glu Lys Ile Ala Ala Ile Ala Glu Lys Leu Asp Leu Lys Lys Asn
370 375 380
Val Val Arg Val Trp Phe Cys Asn Gln Arg Gln Lys Gln Lys Arg Met
385 390 395 400
Lys Tyr Ser Ala Gly Ile
405
<210> 19
<211> 1017
<212> DNA
<213> human BRN3c cDNA
<400> 19
atgatggcca tgaactccaa gcagcctttc ggcatgcacc cggtgctgca agaacccaaa 60
ttctccagtc tgcactctgg ctccgaggct atgcgccgag tctgtctccc agccccgcag 120
ctgcagggta atatatttgg aagctttgat gagagcctgc tggcacgcgc cgaagctctg 180
gcggcggtgg atatcgtctc ccacggcaag aaccatccgt tcaagcccga cgccacctac 240
cataccatga gcagcgtgcc ctgcacgtcc acttcgtcca ccgtgcccat ctcccaccca 300
gctgcgctca cctcacaccc tcaccacgcc gtgcaccagg gcctcgaagg cgacctgctg 360
gagcacatct cgcccacgct gagtgtgagc ggcctgggcg ctccggaaca ctcggtgatg 420
cccgcacaga tccatccaca ccacctgggc gccatgggcc acctgcacca ggccatgggc 480
atgagtcacc cgcacaccgt ggcccctcat agcgccatgc ctgcatgcct cagcgacgtg 540
gagtcagacc cgcgcgagct ggaagccttc gccgagcgct tcaagcagcg gcgcatcaag 600
ctgggggtga cccaggcgga cgtgggcgcg gctctggcta atctcaagat ccccggcgtg 660
ggctcgctga gccaaagcac catctgcagg ttcgagtctc tcactctctc gcacaacaac 720
atgatcgctc tcaagccggt gctccaggcc tggttggagg aggccgaggc cgcctaccga 780
gagaagaaca gcaagccaga gctcttcaac ggcagcgaac ggaagcgcaa acgcacgtcc 840
atcgcggcgc cggagaagcg ttcactcgag gcctatttcg ctatccagcc acgtccttca 900
tctgagaaga tcgcggccat cgctgagaaa ctggacctta aaaagaacgt ggtgagagtc 960
tggttctgca accagagaca gaaacagaaa cgaatgaagt attcggctgt ccactga 1017
<210> 20
<211> 338
<212> PRT
<213> human BRN3c protein
<400> 20
Met Met Ala Met Asn Ser Lys Gln Pro Phe Gly Met His Pro Val Leu
1 5 10 15
Gln Glu Pro Lys Phe Ser Ser Leu His Ser Gly Ser Glu Ala Met Arg
20 25 30
Arg Val Cys Leu Pro Ala Pro Gln Leu Gln Gly Asn Ile Phe Gly Ser
35 40 45
Phe Asp Glu Ser Leu Leu Ala Arg Ala Glu Ala Leu Ala Ala Val Asp
50 55 60
Ile Val Ser His Gly Lys Asn His Pro Phe Lys Pro Asp Ala Thr Tyr
65 70 75 80
His Thr Met Ser Ser Val Pro Cys Thr Ser Thr Ser Ser Thr Val Pro
85 90 95
Ile Ser His Pro Ala Ala Leu Thr Ser His Pro His His Ala Val His
100 105 110
Gln Gly Leu Glu Gly Asp Leu Leu Glu His Ile Ser Pro Thr Leu Ser
115 120 125
Val Ser Gly Leu Gly Ala Pro Glu His Ser Val Met Pro Ala Gln Ile
130 135 140
His Pro His His Leu Gly Ala Met Gly His Leu His Gln Ala Met Gly
145 150 155 160
Met Ser His Pro His Thr Val Ala Pro His Ser Ala Met Pro Ala Cys
165 170 175
Leu Ser Asp Val Glu Ser Asp Pro Arg Glu Leu Glu Ala Phe Ala Glu
180 185 190
Arg Phe Lys Gln Arg Arg Ile Lys Leu Gly Val Thr Gln Ala Asp Val
195 200 205
Gly Ala Ala Leu Ala Asn Leu Lys Ile Pro Gly Val Gly Ser Leu Ser
210 215 220
Gln Ser Thr Ile Cys Arg Phe Glu Ser Leu Thr Leu Ser His Asn Asn
225 230 235 240
Met Ile Ala Leu Lys Pro Val Leu Gln Ala Trp Leu Glu Glu Ala Glu
245 250 255
Ala Ala Tyr Arg Glu Lys Asn Ser Lys Pro Glu Leu Phe Asn Gly Ser
260 265 270
Glu Arg Lys Arg Lys Arg Thr Ser Ile Ala Ala Pro Glu Lys Arg Ser
275 280 285
Leu Glu Ala Tyr Phe Ala Ile Gln Pro Arg Pro Ser Ser Glu Lys Ile
290 295 300
Ala Ala Ile Ala Glu Lys Leu Asp Leu Lys Lys Asn Val Val Arg Val
305 310 315 320
Trp Phe Cys Asn Gln Arg Gln Lys Gln Lys Arg Met Lys Tyr Ser Ala
325 330 335
Val His
Claims (10)
1.一种从非神经细胞转化制备保留年龄特征的背根节神经元的方法,其包括如下步骤:
1)构建含有细胞转分化基因组合的病毒载体,并通过转染细胞进行病毒包装;
2)培养供体源细胞,并用经包装的病毒感染经培养的供体源细胞;
3)在诱导分化培养液中诱导所述供体源细胞直接转分化为背根节神经元;以及
4)分离纯化所得的背根节神经元,
其中,所述细胞转分化基因组合包含以下基因的组合:(1)选自NGN1、NGN2和ASCL1中的至少一种基因;(2)选自ISL1、ISL2、Brn3a、Brn3b和Brn3c中的至少两种基因;以及任选的(3)选自SOX4和SOX11中的至少一种基因。
2.权利要求1所述的方法,其中所述基因为来源于人、小鼠或其它任何种属的同源基因。
3.权利要求1-2中任一项所述的方法,其中所述病毒载体选自逆转录病毒载体、慢病毒载体或AAV病毒载体;和/或载体中调控表达水平的启动子选自CMV、CAG、EF1α、PGK、TRETight、TRE3G中的任何一种或多种,优选地,所述启动子选自CMV。
4.权利要求1-3中任一项所述的方法,其中在病毒载体的构建过程中可通过不同来源的2A序列或IRES序列来连接上述基因,并可任选地进一步引入荧光报告基因。
5.权利要求1-4中任一项所述的方法,其中所述供体源细胞为任何年龄的正常人或患者的皮肤成纤维细胞或其它非神经元细胞,例如干细胞、肺成纤维细胞、包皮成纤维细胞、胶质细胞,优选地,所述供体源细胞为正常人或患者的皮肤成纤维细胞。
6.权利要求1-5中任一项所述的方法,其中在培养供体源细胞的过程中采用合适的包被基质对培养容器进行预包被,所述合适的包被基质选自层粘连蛋白、明胶、纤连蛋白、Matrigel中的至少一种,优选地,所述包被基质为Matrigel。
7.权利要求1-6中任一项所述的方法,其中所述诱导分化培养液含有促进转分化的小分子化合物以及生长因子的组合,所述促进转分化的小分子化合物包含佛司可林(FSK)、cAMP、双丁酰环腺苷酸(DB-cAMP)、RA、LDN-193189(LDN)、SB431542、CHIR99021中的一种以上,优选地,所述小分子化合物为佛司可林和/或LDN-193189;所述生长因子包含bFGF2、NGF、GDNF、NT3中的一种以上,优选地,所述生长因子为bFGF2。
8.权利要求1-7中任一项所述的方法,其中所述分离纯化是将转分化后的细胞消化并重悬为单细胞悬浮液,用细胞滤器、流式细胞仪或在明胶包被的培养皿上差异性贴壁等方法以分离得到高纯度的背根节神经元。
9.采用权利要求1-8中任一项所述的方法制备得到的保留年龄特征的背根节神经元。
10.权利要求9所述的保留年龄特征的背根节神经元在建立用于筛选疼痛治疗药物的方法中的用途。
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