CN105177032B - 新型人肿瘤坏死因子受体-Fc融合基因及其产物蛋白 - Google Patents
新型人肿瘤坏死因子受体-Fc融合基因及其产物蛋白 Download PDFInfo
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Abstract
本发明公开了一种提高重组人TNFR75‑Fc融合基因表达量的方法,所述方法包括提高了一种新的SEQ ID NO:3所述TNFR75‑Fc融合基因;同时提供了一种载体为pCI‑gs‑TNFR75‑Fc;融合基因构建过程中,TNFR75的3’端引物中引入了18个碱基与人IgG1Fc基因片段5’端的18个碱基互补;同时对细胞株的筛选方法及MSX浓度、SEQ ID NO:3序列中人可溶性TNFRcDNA和人IgG1重链恒定区Fc段基因片段的制备方法进行了改进,最终提高了融合蛋白表达量。
Description
本申请是申请号为201010268409.3,申请日为2010.09.01,发明名称为新型人肿瘤坏死因子受体-Fc融合基因及其产物蛋白的分案申请。
技术领域
本发明属于基因工程制药领域,具体涉及一种新型TNFR-Fc融合基因及其表达产物。
背景技术
类风湿性关节炎(Rheumatoid Arthritis,RA)是人类最常见的自身免疫性疾病之一,患病率约1%,与人类白细胞抗原DR4/DR1明显相关,具有一定的遗传倾向。RA的临床特征多为手、足、腕、膝、臀等的关节滑膜发炎,最终导致关节损伤。滑膜炎引起大量淋巴细胞浸润,主要包括巨噬细胞、T淋巴细胞和浆细胞,同时血管增生。关节损伤主要发生于滑膜与软骨和骨毗邻处。
RA是一种以累及关节为主的系统性自身免疫性疾病。近年来研究表明,肿瘤坏死因子-α(TNF-α)是RA发病机制中的关键因子(Feldmann M 2001;RavinderN Maini,2001;RavinderN Maini,199),其可刺激机体产生一系列因子,如白细胞介素(IL)-1、IL-6、IL-8和粒细胞集落刺激因子等的产生,并诱导内皮细胞表达黏附分子,吸引白细胞到受累关节。TNF-α还刺激滑膜巨噬细胞、纤维母细胞、破骨细胞和软骨细胞产生基质金属蛋白酶,并抑制软骨蛋白聚糖的合成,并可导致滑膜炎症和关节软骨的损伤。阻断TNF-α即可在RA发病机制的上游阻断炎症反应,达到治疗RA的目的。
肿瘤坏死因子α(Tumor Necrosis Factor Alpha,TNFα)和淋巴毒素(Lymphotoxin,LT)是通过与其共同受体TNFR75和TNFR55结合而发挥生物学作用的。人肿瘤坏死因子受体75(TNFR75)由461个氨基酸组成,其N-末端235个氨基酸残基,是TNFR75蛋白酶水解下来的细胞膜外区片段,也称为可溶性TNFR75(sTNFR75)。
大量实验证据表明可溶性TNFR75和TNFR55(即受体的膜外部分)可以通过与TNFα和LT的有效结合而阻断TNFα和LT在生物体内的生物学作用(Hunns-Martin Lorenz,2002;smith,C.A.等(1990),science,248:1019-1023),且TNFR75分布更广发,亲和能力更强。但TNFR半衰期较短。
人IgG类免疫球蛋白半衰期可高达21天,它们是人类血液中最丰富的蛋白质,分为IgA、IgG、IgM、IgE和IgD,其中IgG有IgG1、IgG2、IgG3和IgG4四个亚型。IgG1Fc段由232个氨基酸残基组成,包括铰链区、CH2区和CH3区。已有报道说将IgG的Fc绞链区中的半胱氨酸残基与其他蛋白质(如各种细胞因子和可溶性受体)结合而形成融合蛋白,使蛋白质类似于IgG分子但无CH1区域和轻链。由于结构上的同源,Fc融合蛋白表现出与类似同种型的人IgG相当的体内药物动力学特性。
国外已有人借助基因工程手段构建了人TNFRII型受体部分与IgG的Fc片段的融合蛋白,此蛋白在离体条件下对TNF有中和作用(美国专利5,605,590)。国内也有构建此类融合蛋白,马菁等在CN1417334A肿瘤坏死因子受体可溶部分的重组基因,及融合蛋白基因与产物中构建了一种含有linker的融合蛋白;刘昌闾等在CN1502632A新型TNFR-Fc融合蛋白中构建了一种截短的融合蛋白;徐斌等在CN101003575中利用双顺反子构建了一种人肿瘤坏死因子可溶性受体Ⅱ-抗体FC段融合蛋白。
这类药物人源化程度高,引起的免疫原性反应低,治疗效果很好,比单靠止痛药和抗炎药更有效控制病情。但目前这类治疗药物普遍存在制备方法复杂,表达量低,价格昂贵等丞待解决的问题。
发明内容
本发明解决的一个问题是提供了一种新型的重组人TNFR75-Fc融合基因,及其表达的蛋白质产物。
本发明解决的第二个问题是构建了一种含有重组人TNFR75-Fc融合基因片段的重组载体pCI-gs-TNFR75-Fc,转染哺乳动物细胞后,其真核细胞的扩增标记,可大幅提高目的基因在宿主细胞中的拷贝数,从而提高目的蛋白的表达量。
本发明解决的第三个问题是,提供了一种含有重组载体pCI-gs-TNFR75-Fc的哺乳动物细胞,可以稳定表达TNFR75-Fc。所述哺乳动物细胞可以是CHO细胞、NSO细胞等常用哺乳动物细胞工程细胞株。
本发明解决的第四个问题是通过硫氨甲硫氨酸(MSX)加压扩增筛选,使表达目的蛋白细胞株表达量提高至少一个数量级,在进行高效表达细胞株筛选时,最终将MSX浓度提高到400~500μm,筛选单克隆表达量达到20~30pg/cell·24hr。
为解决上述问题,本发明通过如下技术方案来实施:
抽提HL-60细胞株的总RNA,RT-PCR扩增人sTNFR75基因片段;PCR扩增人IgG1 Fc基因片段。采用Overlap extention PCR技术将两基因片段进行拼接得到编码rhTNFR:Fc融合蛋白的全长cDNA序列。将获得的该cDNA序列插入克隆中间载体T easy,经序列测定证实正确后进行真核表达载体的构建。
rhTNFR:Fc融合蛋白cDNA片段克隆于表达载体,采用脂质体转染技术,将无菌抽提的重组质粒rhTNFR:Fc/pCI-gs导入CHO细胞中,经MSX加压筛选,得到了高表达量的rhTNFR:Fc融合蛋白的基因工程单克隆细胞株,在将MSX浓度提高到400~500μm时,筛选单克隆表达量达到20~30pg/cell·24hr。
本发明通过OVERLAP PCR的方法合成了一种人肿瘤坏死因子受体融合基因TNFR75-Fc,采用含有GS系统的真核细胞高效表达载体,在哺乳动物细胞中经过MSX加压筛选使得该融合蛋白的表达量提高了20个百分点,融合蛋白活性提高了8个百分点。
具体实施方式
下面结合具体实施方式对本发明作进一步详细说明,但本发明并不限于下述实施例。
实施例1人可溶性TNFR75cDNA的制备
1、PCR扩增TNFR75cDNA
设计引物A:5’TC AAG CTT ATG GCT CCC GTC GCC GTC TGG 3’引物B:5’GTC ACAAGA TTT GGG CTC GTC GCC AGT GCT CCC TTC AGC 3’,
设计另外一组引物,在引物B中将引入linker序列,该序列(Gly4Ser)3,为一编码15个氨基酸的疏水性多肽,它们的活动度较好,不影响TNFR和Fc的天然三维结构,其linker的DNA序列为5’-GGT GGC GGT GGA AGC GGC GGT GGC GGA AGC GGC GGT GGC GGC AGC-3’。
设计引入linker序列的引物B。引物Linker-B:5’GCT GCC GCC ACC GCC GCT TCCGCC ACC GCC GCT TCC ACC GCC ACC GTC。
以人早幼粒白血病细胞总RNA为模板,分别以引物A和B为模板、以A和Linker-B为模板,进行RT-PCR反应,94℃变性5min开始循环,94℃30sec,58℃30sec,72℃1min,共32个循环,最后72℃延伸8min。得到编码sTNFR75和对照sTNFR75-linker的基因片段。
2、PCR产物的鉴定和凝胶回收
将上述条件进行PCR,在琼脂糖凝胶电泳上进行鉴定,发现产物中目的蛋白分子量大约800bp的带,将该片段回收。
实施例2人IgG1重链恒定区Fc段基因片段的克隆
设计引物C:5’GAG CCC AAA TCT TGT GAC GAG CCC AAA TCT TGT GAC AAA 3’,引物D:5’AGT GAA TTC TCA TTT ACC CGG AGA CAG GGA 3’;
设计引物linker-C:GGT GGC GGT GGA AGC GGC GGT GGC GGA AGC GGC GGT GGCGGC AGC GAG。
以IgG1 Fc/T easy载体质粒为模板,分别以C和D为引物、以Linker-C和D为引物,进行RT-PCR反应,94℃变性5min开始循环,94℃20sec,62℃30sec,72℃2min,共35个循环,最后72℃延伸10min。扩增得到编码人IgG1 Fc和对照linker-IgG1 Fc的基因片段。
实施例3 TNFR75-Fc融合基因的获得
1、PCR扩增编码rhTNFR-Fc融合蛋白/rhTNFR-linker-Fc的全长基因片段
以sTNFR75PCR扩增产物和人IgG1 Fc段PCR扩增产物为模板,以A:5’TC AAG CTTATG GCT CCC GTC GCC GTC TGG 3’和D:5’AGT GAA TTC TCA TTT ACC CGG AGA CAG GGA3’为引物,进行RT-PCR反应。
同时以sTNFR75-linker PCR扩增产物和人linker-IgG1 Fc段PCR扩增产物为模板,以A:5’TC AAG CTT ATG GCT CCC GTC GCC GTC TGG 3’和D:5’AGT GAA TTC TCA TTTACC CGG AGA CAG GGA 3’为引物,进行RT-PCR反应。
RT-PCR扩增反应步骤:94℃变性5min开始循环,94℃40sec,62℃30sec,70℃1min,共30个循环,最后72℃延伸10min。
扩增得到rhTNFR-Fc和rhTNFR-linker-Fc融合蛋白的全长cDNA片段,其基因片段长分别为1470bp和1485bp。
2、rhTNFR-Fc/rhTNFR-linker-Fc融合蛋白cDNA克隆于中间载体
rhTNFR-Fc/rhTNFR-linker-Fc融合蛋白cDNA PCR扩增产物与线性T easy vector(Promega)进行连接反应。连接产物转化E.coli大肠杆菌感受态宿主细胞,涂布于预先加入X-gal和IPTG的LB平板(含100μg/ml氨苄青霉素和15μg/ml四环素)上进行蓝白斑筛选。从转化平板上随机挑选白色单菌落,分别接种增殖,进行质粒快速鉴定,得到TNFR75-Fc和对照rhTNFR-linker-Fc融合基因。
实施例4 TNFR75-Fc/rhTNFR-linker-Fc融合基因的表达
1、rhTNFR-Fc/rhTNFR-linker-Fc融合基因片段克隆于表达载体
rhTNFR-Fc/rhTNFR-linker-Fc融合蛋白表达型重组质粒的构建是利用经商业表达载体pCI-neo改造的pCI-gs的EcoR I单酶切位点,插入经DNA序列测定结果正确的rhTNFR-Fc/rhTNFR-linker-Fc基因片段,用Spe1单酶切鉴定插入片段的正反方向,连接产物转化E.coli感受态细胞,经筛选鉴定后获得rhTNFR-Fc/pCI-gs/E.coli Top10F’和对照rhTNFR-linker-Fc/pCI-gs/E.coli Top10F’重组菌。
2、表达型重组质粒的大量制备
将携带重组质粒rhTNFR-Fc/pCI-gs/rhTNFR-linker-Fc/pCI-gs的大肠杆菌菌种接种于200ml液体培养基中,经过夜培养后采用Qiagen Plasmid Maxi Kits,按照说明书进行重组质粒的大量制备。所得质粒DNA,经70%乙醇洗涤、无菌风干后,溶解于500μl无菌水中,取2μl质粒稀释100倍分别检测A260值和A280值,A260/A280的比值在1.75-1.85之间时,则将该质粒用于细胞转染。
3、细胞株转染
培养瓶中培养两天的CHO细胞用0.25%胰蛋白酶溶液消化后,取适量进行台盼蓝染色计数,以3×105个细胞数接种6孔板的单孔;细胞接种6孔板24小时后达90%满层,可进行转染;各取250μl OPTI-MEM I(Gibco),加入两支无菌离心管中,在两管中分别加入10μlLipofectamine(Invitrogen)和4μg稀释质粒,将两管中的液体混合至同一管中,室温静置20分钟使其形成DNA:脂质体复合物;与此同时,吸弃6孔板内的细胞培养基,用细胞生长培养基(DMEM/F12/10%FCS)轻轻洗涤细胞两次后在各孔中加入2ml细胞生长培养基;将500μlDNA:脂质体复合物溶液加入6孔板中的相应孔中,置于37℃,5%CO2培养箱中培养过夜。
实施例5 TNFR75-Fc/TNFR75-linker-Fc融合蛋白高表达细胞株的筛选
将实施例4筛选所得到重组细胞株用0.25%胰蛋白酶溶液消化后,以1:3的比例传入三个100mm培养皿中培养过夜;24小时后,将100mm培养皿中的培养基更换为选择培养基,即在含10%透析胎牛血清(Gibco BRL)的DMEM(无谷氨酰胺)培养液中加入终浓度为25μm的MSX(硫胺甲硫氨酸,Sigma)作为筛选剂;根据细胞死亡情况每隔2-4天更换选择培养基,约7-10天细胞开始大量死亡,约14天后细胞克隆开始出现,待细胞克隆直径达1-2mm时用克隆环从平板上挑取单克隆转接入24孔板中,每批转染挑取约50个单细胞克隆。
单细胞克隆在24孔板中长至50-70%满层时,取各克隆的培养上清进行ELISA检测,根据细胞生长情况及表达量,选取表达量大于1pg/cell·24hr的细胞克隆进行药物加压扩增筛选;逐步提高筛选剂MSX的浓度使整合于染色体中的重组质粒进行扩增,待药物浓度提高至500μm时,筛选单克隆表达量达到20~30pg/cell·24hr。取各克隆的培养上清,应用ELISA方法检测其融合蛋白表达量,总共各挑取单克隆50个进行表达量测定,结果见表1。
表1、表达量对比实验结果
由表1计算可知,通过本发明生产新型重组TNFR75-Fc表达量比对照实验提高了20个百分点,更有利于该蛋白的扩大生产。
实施例6 TNFR75-Fc/TNFR75-linker-Fc融合蛋白活性对比试验
将用筛选出的细胞株表达的融合蛋白TNFR75-Fc/TNFR75-linker-Fc进行Sepharose-A亲和层析和疏水层析。具体步骤为(1)通过蛋白A亲和层析纯化蛋白,在蛋白A亲和层析中,蛋白上样时加入1mol/L的尿素,在蛋白的洗脱过程中,洗脱液中也加入1mol/L尿素的尿素。在低pH约3.5时洗脱下目的蛋白;(2)将(1)所得样品直接通过疏水层析上样,所用的盐溶液为硫酸铵,所用填料为含有丁基或者苯基的填料。获得纯度大于90%的融合蛋白。
然后进行活性测定试验。通过rhTNFR-Fc拮抗TNF-α对靶细胞L929细胞株的杀伤来检测rhTNFR-Fc的生物学活性。
样品活性(AU/ml)=[标准品ED50(ng/ml)/待测品ED50(ng/ml)]×标准品效价(AU/ml)×待测样品稀释倍数
结果见表2。
1、取对数生长期的L929细胞,用0.25%胰蛋白酶常规消化后充分分散细胞,每次测活(1块96孔板)取约2×106细胞,离心弃上清,加入培养液B将细胞培养液的细胞密度调整至1.5×105/ml后,加入96孔培养板中,0.1ml/孔,置于37℃、5%二氧化碳孵箱中培养过夜(18~24h)。
2、配制标准品:取一支10μg/ml的TNFR:Fc工作标准品,加入用TNF-α(40U/ml)稀释的10μg/ml的放线菌素D溶液将其稀释至浓度为500ng/ml。
3、根据待测定样品的蛋白定量,首先用无菌注射用水稀释至1mg/ml,在1.5ml无菌离心管内用TNF-α(40U/ml)稀释的10μg/ml的放线菌素D溶液逐步稀释至500ng/ml,注意每次稀释倍数不超过10倍。
4、标准品和供试品的稀释
连续倍比稀释工作标准品或样品的稀释液(即稀释后所有管中含有相同浓度的TNF-α和放线菌D,但TNFR:Fc的浓度不同。下一步加入含等体积培养液的孔中时,实际的稀释度将是此时的2倍)。
5、每孔加入100μl各种稀释度的样品,每个稀释度3个孔。阴性对照加入用TNF-α稀释的40U/ml的放线菌素D溶液。阳性对照中加入用无血清RPMI-1640/DMEM(1:1)培养液稀释的10μg/ml的放线菌素D溶液。
6、5%CO2培养箱中37度培养18-24小时。
7、终点测定:每孔加入40.0μl结晶紫染色液,染色十分钟,用自来水漂洗3~4次,直至自来水无色。将96孔板尽量拍干,使板内没有残留水分,向96孔板加入脱色液,每孔100μl,混匀,酶标仪570nm处读取吸收值。结果见表2。
表2、活性对比实验结果
| LOGEC50 | |
| TNFR-Fc | 3.812 |
| TNFR-linker-Fc | 3.518 |
由表2计算可知,在同样蛋白浓度下,TNFR75-Fc比TNFR75-linker-Fc的蛋白活性提高了8个百分点。
Claims (2)
1.一种提高TNFR75-Fc 融合基因表达量的方法,其特征在于,包括如下步骤:构建一种含有SEQ ID NO:3所述碱基序列的重组TNFR75-Fc融合基因;构建一种含有SEQ ID NO:3所述的碱基序列的重组载体,所述载体为pCI-gs-TNFR75-Fc,该载体在进行高效表达细胞株筛选过程中,最终将MSX 浓度提高到500μm;pCI-gs是由pCI-neo改造得到的,利用pCI-gs的EcoR I单酶切位点,插入经DNA序列测定结果正确的rhTNFR-Fc基因片段,用Spe1单酶切鉴定插入片段的正反方向,得到pCI-gs-TNFR75-Fc。
2.如权利要求1 所述方法,其特征在于,所述SEQ ID NO:3 融合基因构建过程中,TNFR75 的3’端引物中引入了18 个碱基与人IgG1Fc 基因片段5’端的18 个碱基互补;
所述SEQ ID NO:3 序列中人可溶性TNFR75 cDNA 的制备方法为:
1)、PCR 扩增TNFR75 cDNA
设计引物A :5’TC AAG CTT ATG GCT CCC GTC GCC GTC TGG 3’引物B :5’GTC ACAAGA TTT GGG CTC GTC GCC AGT GCT CCC TTC AGC 3’,
设计另外一组引物,在引物B 中将引入linker 序列,该序列(Gly4Ser)3, 为一编码15个氨基酸的疏水性多肽,它们的活动度较好,不影响TNFR 和Fc 的天然三维结构,其linker的DNA 序列为5’- GGT GGC GGT GGA AGC GGC GGT GGC GGA AGC GGC GGT GGC GGC AGC-3’;
设计引入linker序列的引物B ;引物Linker-B :5’GCT GCC GCC ACC GCC GCT TCCGCC ACC GCC GCT TCC ACC GCC ACC GTC ;
以人早幼粒白血病细胞总RNA 为模板, 分别以引物A 和B 为模板、以A 和Linker-B为模板,进行RT-PCR 反应,94℃变性5min 开始循环,94℃ 30sec,58℃ 30sec,72℃ 1min,共32个循环,最后72℃延伸8min ;得到编码sTNFR75 和对照sTNFR75-linker 的基因片段;
2)、PCR 产物的鉴定和凝胶回收
将上述条件进行PCR,在琼脂糖凝胶电泳上进行鉴定,发现产物中目的基因分子量800bp 的带,将该片段回收;
所述SEQ ID NO:3 序列中人IgG1 重链恒定区Fc 段基因片段的克隆:
设计引物C :5’GAG CCC AAA TCT TGT GAC GAG CCC AAA TCT TGT GAC AAA 3’,引物D:
5’AGT GAA TTC TCA TTT ACC CGG AGA CAG GGA 3’;
设计引物linker-C:GGT GGC GGT GGA AGC GGC GGT GGC GGA AGC GGC GGT GGC GGCAGC GAG ;
以IgG1 Fc/T easy 载体质粒为模板,分别以C 和D 为引物、以Linker-C 和D 为引物,进行RT-PCR 反应,94℃变性5min 开始循环,94℃ 20sec,62℃ 30sec,72℃ 2min,共35 个循环,最后72℃延伸10min ;扩增得到编码人IgG1 Fc 和对照linker-IgG1 Fc 的基因片段。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5605690A (en) * | 1989-09-05 | 1997-02-25 | Immunex Corporation | Methods of lowering active TNF-α levels in mammals using tumor necrosis factor receptor |
| WO1997037016A1 (en) * | 1996-04-02 | 1997-10-09 | Yeda Research And Development Co. Ltd. | Modulators of tnf receptor associated factor (traf), their preparation and use |
| CN1694958A (zh) * | 2002-09-13 | 2005-11-09 | 昆士兰大学 | 以密码子翻译效率为基础的基因表达系统 |
| CN101166757A (zh) * | 2003-08-26 | 2008-04-23 | 阿姆普罗廷公司 | 新的嵌合多肽及其应用 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5395760A (en) * | 1989-09-05 | 1995-03-07 | Immunex Corporation | DNA encoding tumor necrosis factor-α and -β receptors |
| CN100395339C (zh) * | 2006-02-28 | 2008-06-18 | 中国人民解放军第二军医大学 | 一种用哺乳动物细胞高效分泌表达丙型肝炎病毒包膜蛋白e2的方法 |
| CN101747440B (zh) * | 2008-12-18 | 2014-05-07 | 嘉和生物药业有限公司 | 一种TNFR-Fc融合蛋白及其用途 |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5605690A (en) * | 1989-09-05 | 1997-02-25 | Immunex Corporation | Methods of lowering active TNF-α levels in mammals using tumor necrosis factor receptor |
| WO1997037016A1 (en) * | 1996-04-02 | 1997-10-09 | Yeda Research And Development Co. Ltd. | Modulators of tnf receptor associated factor (traf), their preparation and use |
| CN1694958A (zh) * | 2002-09-13 | 2005-11-09 | 昆士兰大学 | 以密码子翻译效率为基础的基因表达系统 |
| CN101166757A (zh) * | 2003-08-26 | 2008-04-23 | 阿姆普罗廷公司 | 新的嵌合多肽及其应用 |
Non-Patent Citations (1)
| Title |
|---|
| 重组人肿瘤坏死因子受体-Fc融合蛋白质控方法和标准的研究;张翊 等;《药学学报》;20130331;165-168 |
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| CN102382850A (zh) | 2012-03-21 |
| CN105177032A (zh) | 2015-12-23 |
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