CN104193807B - 凝血酶抑制多肽及其制备方法、应用 - Google Patents

凝血酶抑制多肽及其制备方法、应用 Download PDF

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CN104193807B
CN104193807B CN201410509069.7A CN201410509069A CN104193807B CN 104193807 B CN104193807 B CN 104193807B CN 201410509069 A CN201410509069 A CN 201410509069A CN 104193807 B CN104193807 B CN 104193807B
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polypeptide
thrombin
relevant disease
suppresses
atherosclerosis
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CN104193807A (zh
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郭瑞
蓝咏
刘玉
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Guangzhou Bioscience Co ltd
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Bei Aojiyin Bio Tech Ltd Guangzhou
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Abstract

本发明涉及药物领域,具体涉及预防和治疗或预防动脉粥样硬化的多肽化合物。凝血酶抑制多肽2,其特征在于:其序列为RGDLFRKSADGFIALMKLKK。采用Fmoc保护的固相合成技术制备。可共价连接一个佐剂,佐剂是牛血清白蛋白,人血清白蛋白,或聚乙二醇。凝血酶抑制多肽2在治疗动脉粥样硬化相关疾病中的应用。所述的动脉粥样硬化相关疾病是心绞痛、心肌梗塞、心律失常、脑卒中、脑萎缩、顽固性高血压、肾功能不全等病变。可通过多种给药方式治疗动脉粥样硬化相关疾病,包括皮下或肌肉注射,静脉注射或者静脉滴注,口服给药如药丸、胶囊等,鼻喷剂等。本发明中的凝血酶抑制多肽2可以靶向抑制凝血酶,抑制凝血,达到预防或治疗动脉粥样硬化的作用。

Description

凝血酶抑制多肽及其制备方法、应用
技术领域:
本发明涉及药物领域,具体涉及用于预防和治疗或预防动脉粥样硬化的多肽化合物。
背景技术:
动脉粥样硬化(Atherosclerosis)是由于脂肪、血栓、结缔组织和碳酸钙在血管(主要是动脉,但也包括静脉)沉积所造成的一种对人体有害的状态。其特点是动脉管壁增厚变硬、失去弹性和管腔缩小。动脉粥样硬化的症状主要决定于血管病变及受累器官的缺血程度,主动脉粥样硬化常无症状,冠状动脉粥样硬化者,若管径狭窄达75%以上,则可发生心绞痛、心肌梗塞、心律失常,甚至猝死。脑动脉硬化可引起脑缺血、脑萎缩,或造成脑血管破裂出血,肾动脉粥样硬化常引起夜尿、顽固性高血压、严重者可有肾功能不全。肠系膜动脉粥样硬化可表现为饱餐后腹痛便血等症状。下肢动脉粥样硬化引起血管腔严重狭窄者可出现间歇性跛行、足背动脉搏动消失,严重者甚至可发生坏疽。动脉粥样硬化是一组称为动脉硬化的血管病中最常见、最重要的一种。
目前预防和治疗动脉粥样硬化的药物,主要为针对控制易患因素。如患有糖尿病、应及时控制血糖,包括饮食控制。2型糖尿病的降糖药物应以不引起高胰岛素血症为宜如达美康等;如有高血压则应给降压药,使血压降至适当水平,如有血胆固醇增高,则应控制高胆固醇适当给予降脂药物。
凝血酶能使纤维蛋白原转化成纤维蛋白。血管内促进血栓的形成,引起动脉粥样硬化。我们的实验表明,采用凝血酶抑制剂可以控制血管内动脉粥样硬化血栓的形成,能有效抑制动脉粥样硬化斑块的形成。这是一个治疗动脉粥样硬化的新靶点。
现阶段,没有成熟开发的凝血酶抑制剂问世,用于治疗动脉粥样硬化。
发明内容:
本发明目的是针对现有治疗动脉粥样硬化药物的特点,设计一种多肽化合物,能有效治疗或预防动脉粥样硬化。
技术方案
凝血酶抑制多肽2,其特征在于:其序列为RGDLFRKSADGFIALMKLKK。采用Fmoc保护的固相合成技术制备。可共价连接一个佐剂,佐剂是牛血清白蛋白,人血清白蛋白,或聚乙二醇。凝血酶抑制多肽2在治疗动脉粥样硬化相关疾病中的应用。所述的动脉粥样硬化相关疾病是心绞痛、心肌梗塞、心律失常、脑卒中、脑萎缩、顽固性高血压、肾功能不全等病变。可通过多种给药方式治疗动脉粥样硬化相关疾病,包括皮下或肌肉注射,静脉注射或者静脉滴注,口服给药如药丸、胶囊等,鼻喷剂等。
有益结果:
本发明中的凝血酶抑制多肽2可以靶向抑制凝血酶,抑制凝血,达到预防或治疗动脉粥样硬化的作用。更优选是治疗动脉粥样硬化相关疾病药物中的用途。所述的脉粥样硬化相关疾病包括心绞痛、心肌梗塞、心律失常、脑卒中、脑萎缩、顽固性高血压、肾功能不全等病变。
具体实施方式
实施例1
多肽的化学合成方法
多肽2用Fmoc保护的固相合成技术制备。合成反应按照多肽2序列从C端向N端进行,Rink介质(可在AdvancedChemTech公司购得)上有自由氨基。每一步连接过程中,氨基酸残基都要活化,活化混合物中有4倍于介质上自由氨基的HBTU,HOBt,DIEA和Fmoc-氨基酸。每次氨基酸的连接反应之后,都用一个吡啶/醋酸/N-甲基咪唑(3:2:0.5)的混合物来封闭未连接的自由氨基,封闭反应10分钟。每次氨基酸的连接反应之后,下一个氨基酸连接之前,都要把介质上的Fmoc-基团去掉,去Fmoc-基团使用含20%哌啶的二甲基甲酰胺,需15分钟。最后,当所有氨基酸残基顺序连接之后,多肽2用98%三氟乙酸从介质上切割下来,切割在室温下进行2小时。
应用上述化学条件可合成并获得多肽2,序列为RGDLFRKSADGFIALMKLKK,该序列为全新序列。
实施例2
凝血酶抑制多肽2对家兔动脉粥样硬化模型的影响
建立家兔动脉粥样硬化模型动物模型。雄性新西兰白兔40只,随机分为4组,分别为:A组为空白对照组:普通饲料喂养;B组为模型对照组:造模+高脂饲料喂养;C组为药物干预组:造模+高脂饲料+凝血酶抑制多肽2(2.5mg/kg/d);D为阳性药干预组:造模+高脂饲料+瑞舒伐他汀片(2.5mg/kg/d)。普通饲料适应性喂养7天后,对模型对照组、药物干预组及阳性药干预组实施右颈动脉内膜液氮冻伤术,术后模型对照组、药物干预组及阳性药干预组高脂饲料喂养,同时灌胃给药,进行药物干预治疗,连续13周后处死。空白对照组一直给予普通饲料喂养。检测血清总胆固醇(totalcholesterol,TC)、甘油三酯(tryglyeride,TG)、高密度脂蛋白胆固醇(highdensitylipoproteincholesterol,HDL-C)和低密度脂蛋白胆固醇(lowdensitylipoproteincholesterol,HDL-C)的水平。对家兔主动脉大体和主动脉根部冰冻切片行油红O染色,对动脉粥样斑块面积进行定量。
结果:多肽2组与高脂高胆固醇喂养的模型家兔组相比,TG、TC、HDL-C、LDL-C水平显著降低(P<0.01,见表1),动脉粥样斑块面积显著性减小(P<0.01,见表2),与模型对照组比较差异均有统计学意义。
表1凝血酶抑制多肽2对家兔动脉粥样硬化模型小鼠胆固醇的影响
*p<0.05,**p<0.01与模型组相比
表2凝血酶抑制多肽2对家兔动脉粥样硬化模型小鼠动脉粥样硬化面积的影响
*p<0.05,**p<0.01与模型组相比
结论:凝血酶抑制多肽2对家兔动脉粥样硬化具有治疗作用。
SEQUENCELISTING
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<120>凝血酶抑制多肽及其制备方法、应用
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Claims (2)

1.一种凝血酶抑制多肽,其特征在于:其序列为RGDLFRKSADGFIALMKLKK。
2.根据权利要求1所述的多肽在制备治疗动脉粥样硬化相关疾病药物中的应用,所述的动脉粥样硬化相关疾病是心绞痛、心肌梗塞、心律失常、脑卒中、脑萎缩、顽固性高血压、肾功能不全。
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CN105175505A (zh) * 2015-09-08 2015-12-23 苏州普罗达生物科技有限公司 瘦素激动多肽及其应用
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