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>技术资源 > 前沿速递 >【ViruStop】ACRO RSV疫苗整体解决方案为您主力!

【ViruStop】ACRO RSV疫苗整体解决方案为您主力!

2023-04-20 13:32    浏览量:491

2023年初,辉瑞、葛兰素史克研发的RSV疫苗先后获得了FDA疫苗与相关生物制品产品咨询委员会支持并预计将于5月份获批上市。4月11日,Moderna也宣布将在本季度递交其研究性RSV候选疫苗mRNA-1345的上市申请。困扰科学界及各大疫苗研发厂商近六十年的RSV疫苗终于即将迎来突破,2023年也被认为将成为RSV疫苗商业化元年,百亿市场争夺战一触即发!

ACROBiosystems百普赛斯为支持RSV相关研究及疫苗研发,在原有的经结构验证的RSV Pre &Post F蛋白及G蛋白基础上进一步扩充,现推出RSV疫苗研发整体解决方案!

点击查看产品详细信息

人类呼吸道合胞病毒(Human Respiratory Syncytial Virus, HRSV)是除了新冠和流感病毒外,另一个引起急性下呼吸道感染(ALRTIs)的主要原因之一,多发于婴幼儿、老年人和免疫功能低下人群,严重者会出现哮喘综合征、呼吸道 阻塞、肺不张甚至窒息死亡。大约三分之二的婴儿在出生后第一年感染了RSV,90%的婴儿在2岁前感染一次或多次HRSV1。据统计,每年全球因HRSV引起的呼吸道感染人数约3.31亿,导致约320万5岁以下儿童住院治疗,其中约6万死亡;而全球老年人因HRSV住院病例数约33.6万,住院死亡约为1.4万2

人类呼吸道合胞病毒(HRSV)是肺炎病毒属(Paramyxoviridae)中唯一已知的人类病原体,于1956年首次从带有鼻炎的黑猩猩中分离出来。HRSV是一种包膜病毒,病毒颗粒被含有糖蛋白G、F和SH的脂质双分子层包围。然而,就是这样一个常见且早已被发现的呼吸道病毒,其疫苗的研发却十分坎坷,以至于至今仍无一款成熟的RSV疫苗问世。此前的数十年间,科学家们不曾停止对于RSV疫苗的研究与开发,但均以失败告终。究其原因,可能是因为RSV病毒结构的特殊性。病毒表面的融合蛋白(fusion protein , F)和粘附蛋白(attachment protein, G)因在病毒入侵过程中的关键作用成为病毒研究的理想靶点,而其中G蛋白变异较多相对不稳定,F蛋白也存在Pre到Post构象转变影响其稳定性。

RSV F蛋白融合前及融合后构象

RSV F蛋白融合前及融合后构象

为了克服这一障碍,科学家们对RSV F蛋白的蛋白结构及其抗体进行了研究,发现该蛋白表面至少存在7个完全不同的抗原表位,并成功筛选到可以与不同表位结合的抗体,分别为φ site_D25/5C4/AM22,I site_131-2A/2F,II site_motavizumab/palivizumab,III site_MPE8,IV site_101F/mAb19,V site_hRSV90。其中识别IV表位的101F、识别II表位的palivizumab和识别I表位的131-2A抗体可以同时识别F蛋白的pre和post构象,识别φ表位的D25抗体只与Pre构象的F蛋白发生结合,识别III表位的MPE8抗体则偏好识别Pre构象,与Post构象具有较弱的结合活性[1]。2010年,Kwakkenbos研究团队筛选获得单克隆抗体AM14,其识别的抗原表位位于F-pre蛋白近赤道区域,横跨两个单体,可特异性识别F-pre三聚体结构,且被证明与此前中和效果最佳的D25抗体具有相似的中和活性和更快的动力学性质[2,3]

RSV-F蛋白抗原表位及抗体结合情况

RSV-F蛋白抗原表位及抗体结合情况[2,3]



ACRO RSV疫苗


RSV疫苗研发整体解决方案


ACROBiosystems百普赛斯为支持RSV相关研究及疫苗研发,在原有的经结构验证的RSV Pre &Post F蛋白及G蛋白基础上进一步扩充,现推出RSV疫苗研发整体解决方案!

点击查看相关产品详细信息

抗原蛋白:Pre and Post F 、Glycoprotein G

抗体:Anti-RSV-F0 AntibodyAnti-RSV-Pre-F0 Antibody

检测试剂盒:Pre-F0 Specific detectionHuman Anti-RSV-F0 IgG Titer detectionMouse Anti-RSV-F0 IgG Titer detectionMonkey Anti-RSV-F0 IgG Titer detection

ACRO RSV疫苗

验证数据

 纯度经SDS-PAGE验证>95%,经SEC-MALS验证>90%。

纯度经SDS-PAGE验证>95%,经SEC-MALS验证>90%

The purity of HRSV (A) Fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H7) is greater than 95% verified by SDS-PAGE and more than 90% verified by SEC-MALS.

 RSV Pre-F蛋白(Cat. No. RSF-V52H7)与Post-F蛋白(Cat. No. RSF-V52H6)和抗体101F、5C4、AM14、131-2A、D25结合活性经ELISA验证,与文献结果一致。

纯度验证

Immobilized HRSV (A) Post-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H6) and HRSV (A) Pre-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H7) at 1 μg/mL (100 μL/well) can bind Anti-Fusion glycoprotein F0 Antibody, Mouse IgG2a (101F) with a linear range of 0.1-4 ng/mL (QC tested).

ACRO RSV疫苗

Immobilized HRSV (A) Pre-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H7) at 1 μg/mL (100 μL/well) can bind Recombinant Mouse Anti-RSV F Antibody (5C4) with a linear range of 0.004-0.25 μg/mL. HRSV (A) Post-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H6) is verified not recoginized by Recombinant Mouse Anti-RSV F Antibody (5C4) (Routinely tested).

ACRO RSV疫苗

Immobilized HRSV (A) Pre-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H7) at 1 μg/mL (100 μL/well) can bind Recombinant Human Anti-RSV Antibody (AM14) with a linear range of 0.004-0.25 μg/mL. HRSV (A) Post-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H6) is verified not recognized by Recombinant Human Anti-RSV Antibody (AM14) (QC tested).

ACRO RSV疫苗

Immobilized HRSV (A) Post-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H6) and HRSV (A) Pre-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H7) at 1 μg/mL (100 μL/well) can bind Anti-RSV Fusion Protein Antibody (131-2A) with a linear range of 0.1-1 ng/mL . (Routinely tested).

ACRO RSV疫苗

Immobilized HRSV (A) Pre-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H7) at 1 μg/mL (100 μL/well) can bind Recombinant Human Anti-RSV Antibody (D25) with a linear range of 0.1-2 ng/mL. HRSV (A) Post-fusion glycoprotein F0, His Tag (Cat. No. RSF-V52H6) is verified not recoginized by Recombinant Human Anti-RSV Antibody (D25) in low concentration (Routinely tested).

ACRO RSV疫苗
点击申请Protocol


ACRO RSV疫苗


其他呼吸道感染病毒类产品更新

SARS-CoV-2: XBB.1.16XBB.2.3DS.1BR.2 ……

Influenza: WHO推荐2023-2024年北半球流感季节流感疫苗病毒成分相关抗原


参考文献:

1. McLellan JS, Chen M, Leung S, et al. Structure of RSV fusion glycoprotein trimer bound to a prefusion-specific neutralizing antibody. Science. 2013;340(6136):1113-1117. doi:10.1126/science.1234914

2. McLellan, J. S., Chen, M., Leung, S., Graepel, K. W., Du, X., Yang, Y., Zhou, T., Baxa, U., Yasuda, E., Beaumont, T., Kumar, A., Modjarrad, K., Zheng, Z., Zhao, M., Xia, N., Kwong, P. D., & Graham, B. S. (2013). Structure of RSV fusion glycoprotein trimer bound to a prefusion-specific neutralizing antibody. Science, 340(6136), 1113–1117. https://doi.org/10.1126/SCIENCE.1234914/SUPPL_FILE/MCLELLAN.SM.PDF

3. Gilman MSA, Moin SM, Mas V, Chen M, Patel NK, et al. (2015) Characterization of a Prefusion-Specific Antibody That Recognizes a Quaternary, Cleavage-Dependent Epitope on the RSV Fusion Glycoprotein. PLOS Pathogens 11(7): e1005035. https://doi.org/10.1371/journal.ppat.1005035



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