CN116270986A - Cat蛋白的新用途、制剂 - Google Patents
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Abstract
本发明属于生物技术领域,公开了一种CAT蛋白用于抑制鹅星状病毒复制的用途,同时,本发明还公开了一种用于抑制鹅星状病毒复制的制剂。
Description
技术领域
本发明属于生物技术领域,具体涉及一种CAT蛋白的新用途、制剂。
背景技术
虽然阻断炎症是缓解人类痛风病症状的有效方法,但感染鹅星状病毒(gooseastrovirus,GAstV)引起雏鹅痛风(一种最近出现的疾病)的治疗和预防仍不清楚。
星状病毒是属于星形病毒科的小型、无包膜、单股正链RNA病毒。星状病毒的宿主范围很广,主要症状是腹泻或肠道疾病(Jakubczak等人,2021;Opriessnig等人,2020;Walter和Mitchell,2003;Wang等人,2021b;Wang等,2020)。近年来,痛风是鹅源性鹅星状病毒(GAstV)感染的主要症状,已在中国的一些鹅场出现,并给中国鹅业造成了持续的经济损失。中国研究人员进行了多角度流行病学调查以评估病毒(Wang等人,2022年;Wei等人,2020年;Yin等人,2021;Zhang等人,2021)。总结这些数据,实验性GAstV感染并未在所有感染的鹅中产生痛风症状,痛风发病率相对较低(Liu等人,2022)。与其他病毒和饮食因素的共同感染可以影响痛风症状的发展(Lin.等人,2017;Liu等人,2020;Liu et al.,2019)。然而,在消除这些因素后,一些结果仍然不符合科赫定律(Wang等人,2021a;Yin等人,2021;Zhang等人,2018)。一些学者认为,疾病进展差异的原因在于一些重要宿主基因的多态性(Habibzadeh等人,2018;Pabst等人,2009;Qing等人,2013)。然而,遗传多态性往往伴随着遗传背景、环境、饮食和其他因素的差异。在集中饲养的鹅中,遗传多态性对GAstV诱发的痛风几乎没有影响。
本发明认为,GAstV成功感染宿主后引发痛风的临界点就像跷跷板的支点。当支点向一侧倾斜时,就会出现相应的临床症状。这个支点可以是一个或多个重要的基因或/和信号通路。为了探索GAstV感染后不同临床症状的支点,对感染雏鹅肾脏组织中的mRNA进行了全面分析。使用转录组测序技术,结合代谢网络途径分析,广泛研究GAstV感染介导的宿主基因重编程。
在研究中,获得了一些新的、出乎意料的发现。
本案解决的技术问题是:如何抑制鹅星状病毒的复制。
发明内容
本发明的目的是提供一种CAT蛋白的新用途,该CAT蛋白(过氧化氢酶)可抑制鹅星状病毒的复制。
同时,本发明还公开了一种含CAT蛋白的用途。
需要进一步说明的是:在一些研究中,指出了CAT蛋白在治疗人的痛风、分解尿酸、抑制痛风引起的炎症的作用(参考CN115463109A一种仿生融合膜包裹尿酸酶和过氧化氢酶纳米粒及其制备方法),但是我们认为这些研究均集中在人痛风产生的原因克服方面,而鹅星状病毒引起的雏鹅痛风的根源和人的痛风根源是截然不同的,并未有前人指出其在抑制鹅星状病毒的复制方面的用途。基于此,提出本发明。
如无特殊限定,M为摩尔/升;
本发明的技术方案为:
CAT蛋白用于抑制鹅星状病毒复制的用途。
需要指出的是,CAT蛋白即为本领域公知的过氧化氢酶,其氨基酸序列为:SEQ IDNO:2。CAT基因的序列如SEQ ID NO:3所示;
同时,本发明还提供了一种用于抑制鹅星状病毒复制的制剂,含有CAT蛋白。
在上述的制剂中,所述制剂为注射剂或口服剂。
作为注射剂,我们建议的制剂中CAT蛋白的浓度为1M~4M;
作为口服剂,我们建议的制剂中CAT蛋白的浓度为5mg/kg~20mg/kg。
在一些实施案例中,上述制剂可以作为饲料添加剂、饮水添加剂等形式加入。
本发明的有益效果如下:
本发明研究发现,CAT蛋白可抑制鹅星状病毒复制,这为由鹅星状病毒引起的雏鹅痛风提供了解决方案;
同时,本发明还提供了一种可抑制鹅星状病毒复制的制剂。
附图说明
图1为实施例1的实验例和对比例的GAstV病毒CT值的图表。
具体实施方式
下面结合具体实施方式,对本发明的技术方案作进一步的详细说明,但不构成对本发明的任何限制。
在阐述本发明的方法之前,对于本发明的若干试剂来源予以说明:
LMH细胞:鸡肝癌细胞系LMH(ATCC CRL-2117)
F12/DMEM培养基:Gibco(C11330500BT)
GD-ZJ-21-01毒株:全序列参考SEQ ID NO:1。
实施例1
LMH细胞铺于12孔细胞培养板中,待细胞90%铺满时,将细胞用无菌PBS洗三遍,加入用无血清F12/DMEM培养基稀释的GD-ZJ-21-01毒株1ml,在37℃,5%CO2细胞培养箱中孵育2小时后,将细胞用无菌PBS洗三遍,加入1ml含2%胎牛血清的F12/DMEM培养基,将CAT蛋白1μl(100μg/μl)加入LMH细胞中,对照组加1μl蛋白稀释液作为对照组;在37℃,5%CO2细胞培养箱中孵育12小时后,提取细胞上清培养基的核酸,检测GAstV病毒CT值,qRT-PCR反应体系如下:
引物序列F:GGGTGATCCGCAAGGAAATA
引物序列R:AAGTTTCACCAGGGTTAGAG
用病毒核酸提取试剂盒提取细胞上清液中核酸,qRT-PCR所用试剂盒为(诺唯赞,HiScript II One Step qRT-PCR SYBR Green Kit)
qRT-PCR反应体系为20μl:
结果如图1,图1中,孵育CAT蛋白的细胞上清液病毒CT值显著高于对照组病毒CT值,说明CAT蛋白可抑制鹅星状病毒复制。
实施例2
体内实验
9日龄鹅胚用于繁殖星状病毒,将繁殖第5代含104.0EID50/0.5mL的GD-ZJ-21-01毒株原液1ml,腿肌注射4日龄仔鹅中,待仔鹅出现排出乳白色粘稠粪便、进食减少、站立不稳、精神不振等痛风症状时,一组(10只)腿肌注射CAT蛋白(6M浓度的CAT蛋白注射0.2ml),另一组(10只)作为阳性对照,注射等体积无菌生理盐水。
1天后,观察注射CAT组仔鹅痛风症状明显好转,无明显痛风症状,死亡率和明显痛风症状率均为0。
阳性对照组仔鹅死亡率为30%,存活仔鹅痛风病情恶化。
通过实施例1和2可以证明:体内、体外实验证明CAT蛋白在星状病毒引起仔鹅痛风的治疗中有显著效果,即可证明,CAT蛋白能够抑制鹅星状病毒复制。
上述实施例为本发明较佳的实施方式,但本发明的实施方式并不受上述实施例的限制,其它的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化,均应为等效的置换方式,都包含在本发明的保护范围之内。
Claims (3)
1.CAT蛋白用于抑制鹅星状病毒复制的用途。
2.一种用于抑制鹅星状病毒复制的制剂,其特征在于,含有CAT蛋白。
3.根据权利要求2所述的制剂,其特征在于,所述制剂为注射剂或口服剂。
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Citations (3)
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CN103826620A (zh) * | 2011-05-27 | 2014-05-28 | Md制药公司 | 新的治疗方法 |
CN112543766A (zh) * | 2018-04-03 | 2021-03-23 | 斯特里迪比奥公司 | 抗体逃避性病毒载体 |
CN112881688A (zh) * | 2021-03-25 | 2021-06-01 | 扬州大学 | 一种快速检测鹅星状病毒的免疫荧光方法 |
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CN103826620A (zh) * | 2011-05-27 | 2014-05-28 | Md制药公司 | 新的治疗方法 |
CN112543766A (zh) * | 2018-04-03 | 2021-03-23 | 斯特里迪比奥公司 | 抗体逃避性病毒载体 |
CN112881688A (zh) * | 2021-03-25 | 2021-06-01 | 扬州大学 | 一种快速检测鹅星状病毒的免疫荧光方法 |
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CHENGGANG LIU等: "Global analysis of gene expression profiles and gout symptoms in goslings infected with goose astrovirus", 《VETERINARY MICROBIOLOGY》, vol. 279 * |
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