CN109223744A - 鱼腥草素钠在制备用于防治糖尿病心脏病产品中的应用 - Google Patents
鱼腥草素钠在制备用于防治糖尿病心脏病产品中的应用 Download PDFInfo
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- CN109223744A CN109223744A CN201811325039.5A CN201811325039A CN109223744A CN 109223744 A CN109223744 A CN 109223744A CN 201811325039 A CN201811325039 A CN 201811325039A CN 109223744 A CN109223744 A CN 109223744A
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Abstract
本发明公开了一种鱼腥草素钠在制备用于防治糖尿病心脏病产品中的应用。鱼腥草素钠可用于制备防治糖尿病心脏病、调控心肌能量代谢紊乱、改善糖脂代谢异常的产品。本发明经实验证实:(1)鱼腥草素钠对糖尿病心脏病有防治作用,有心脏保护效果;(2)可调控心肌能量代谢紊乱;(3)可降低糖尿病引起血脂升高,有一定的降低血糖作用。在制备用于防治糖尿病引起的心脏损伤、心肌能量代谢紊乱、糖脂代谢异常等的产品方面具有良好的临床应用前景。
Description
技术领域
本发明涉及一种鱼腥草素钠在制备用于防治糖尿病心脏病产品中的应用,属于医药技术领域。
背景技术
(一)糖尿病心脏病并发症及流行病学调查
糖尿病是当前威胁人类健康最重要的非传染性疾病之一,我国20岁以上人群中糖尿病患者约9.7%,糖尿病前期的比例达15.5%,而其中只有40%患者获得诊断(中华医学会糖尿病学分会.中国2型糖尿病防治指南(2013年版).中国医学前沿杂志(电子版),2015,(03):26-89.)。糖尿病心脏病(diabetic cardiopathy)是糖尿病最主要的并发症,在糖尿病患者中患心脏并发症在75%左右(Ofstad AP.Myocardial dysfunction andcardiovascular disease in type 2 diabetes.Scand J Clin Lab Invest,2016,76(4):271-81.),主要的表现包括糖尿病心肌病变、冠心病、糖尿病性心脏自主神经功能紊乱所致的心律失常、心功能不全等,是糖尿病患者生存质量的主要影响因素和致死的首要原因,患者心脑血管疾病的风险较非糖尿病人群增加2-4倍,平均寿命减少8年左右,因糖尿病心脏病而死亡的约占糖尿病患者死亡人数的60-70%(Luthra S,Leiva-Juárez MM,TaggartDP.Systematic review of therapies for stable coronary artery disease indiabetic patients.Ann Thorac Surg,2015,100(6):2383-97.)。
目前以补充胰岛素或纠正胰岛分泌等方式控制血糖水平等基础治疗为主,然而单纯血糖控制对于减少糖尿病患者心脑血管损伤及所致死亡风险的作用是有限的,临床上对已经发展成糖尿病心脏病的病人还没有有效的治疗方法,心脏损伤一旦发生很难逆转。
(二)糖尿病心脏病的心肌能量代谢紊乱与调控
心脏是高耗能的器官,心肌细胞内储存的高能磷酸化合物(如ATP)浓度极低,所需能量需心肌细胞不断通过复杂环节将血液中营养物质经氧化磷酸化产生ATP供应。通常在糖尿病确诊前,心血管病变已经发生,在高糖高脂和胰岛素缺乏或抵抗等因素诱导下,通过多种复杂机制最终造成微血管、心肌细胞结构功能改变,其中间过程的复杂机制中,心肌能量代谢紊乱为中心环节和始动因素(Fuentes-Antrás J,Picatoste B,Ramírez E,etal.Targeting metabolic disturbance in the diabetic heart.Cardiovasc Diabetol,2015,14:17.),是心脏功能异常时病理生理过程的早期事件,能量底物转运利用的障碍,参与能量物质生成的葡萄糖进入细胞内的量减少,进而转为主要由脂肪酸β氧化供应能量,引起脂代谢有毒代谢产物如游离脂肪酸增多,导致心脏功能受损(Tillquist MN,MaddoxTM.Update on diabetic cardiomyopathy:inches forward,miles to go.Curr Diab Rep,2012,12(3):305-13.);在氧化磷酸化环节,线粒体是主要的细胞器,糖尿病会引起心肌线粒体的损伤,导致心脏能量代谢的紊乱,引起收缩功能的受损。因此,心脏能量代谢的紊乱,贯穿糖尿病诱发心脏损伤的整个发展过程。
(三)鱼腥草素钠
本品为中药三白草科(Saururaceae)蕺菜属(Houttuynia cordata Thunb)植物鱼腥草的主要挥发性成分鱼腥草素(癸酰乙醛)和亚硫酸氢钠加成物,化学名癸酰乙醛合亚硫酸氢钠。目前临床上主要用于慢性支气管炎及其他上呼吸道感染性疾病等。药理作用主要为对细菌只有微弱的抗菌作用,对金黄色葡萄球菌、流感嗜血杆菌、白念珠菌等有一定抑制作用。关于鱼腥草素钠对糖尿病引起的心脏损伤作用、改善糖脂代谢和改善心肌能量代谢方面的研究并未有报道。也未见有关于鱼腥草素钠在该方面作用的发明专利。
发明内容
本发明目的是提供鱼腥草素钠的一种新用途,其新用途是指鱼腥草素钠用于防治糖尿病引起的心脏病并发症、调控心肌能量代谢紊乱、改善糖尿病引起的糖脂代谢异常以及其他原因引起的血脂升高的产品。本发明的技术方案具体介绍如下。
鱼腥草素钠在制备用于防治糖尿病心脏病产品中的应用。
鱼腥草素钠在制备防治糖尿病引起的血糖升高产品中的应用。
鱼腥草素钠在制备防治糖尿病引起的血脂升高及相关性疾病产品中的应用。
鱼腥草素钠在制备改善糖尿病引起的心肌能量代谢紊乱产品中的应用。
上述产品包括与鱼腥草素钠相同化学结构的物质,以及与鱼腥草素相同结构的物质。
上述的产品包括药物、制剂或保健品中的一种。
上述的产品中,还可以包括药学上或食品学上可接受的载体。
上述的产品的剂型可以是多种多样的,只要是能够使活性成分有效地到达体内的剂型都是可以的。比如可选自:片剂、胶囊剂、粉末、颗粒剂、糖浆、溶液、悬浮液、注射剂、酊剂、口服液、气雾剂、***剂、冲剂、丸剂、散剂等常见剂型或纳米制剂等缓释剂型。
本发明所述活性物质的有效施用剂量可随所用的给药模式和待治疗的疾病的严重程度而变化。在制备用于防治糖尿病引起的心脏损伤、心肌能量代谢紊乱、糖脂代谢异常等的产品方面具有良好的临床应用前景。
具体实施方式
下面结合具体实施例,进一步阐述本发明。应理解,这些实施例仅用于说明本发明而不用于限制本发明的范围。
本发明采用国内外学术界已广泛应用的糖尿病的造模方法,主要采用腹腔注射链脲佐菌素85mg/kg诱导产生血糖升高,进一步诱发心脏损伤和心脏功能不全的大鼠模型。模拟临床口服给药途径,采用灌胃方式将鱼腥草素钠给予模型动物进行干预。
以血糖水平评价糖尿病模型的是否成功;实验结束时测量大鼠血糖、血脂水平,测定心电图变化,检测心衰标志物(血清BNP、AST、ALT水平),测量氧化应激反应相关指标、心肌线粒体离子通道相关酶的变化;测量心肌能量代谢相关高能磷酸化合物以及能量代谢信号通路相关基因的改变,从而评价药物作用效果。
实施例1:鱼腥草素钠对糖尿病大鼠心脏保护作用研究
实验材料
1.药品及制备链脲佐菌素(Streptozocin,批号:WXBC4439V),德国Sigma-alorich公司产品;鱼腥草素钠(批号:06161204,含量大于标示量的93.0%,符合药典规定),上海青平制药有限公司产品;卡托普利(批号:AAP7365),中美上海施贵宝制药有限公司产品。鱼腥草素钠和卡托普利在使用前用蒸馏水溶解,链脲佐菌素使用前使用时溶解于0.1mol/L柠檬酸酸缓冲液中(10mg/mL),避光,现用现配。
2.动物健康雄性大鼠(Sprague Dawley 200-220g),清洁级,购买于上海斯莱克实验动物有限责任公司,动物生产许可证号:SCXK(沪)2012-0002。所有大鼠饲养在温度22-24℃,湿度40-45%和12小时交替的黑暗与光明的环境中,自由饮水和进食。实验动物的使用遵循美国国立卫生院颁布的实验动物护理和使用指南(NIH Publication No.85-23,1996)和上海中医药大学动物护理与使用委员会的规定。
实验方法
1.模型制备方法 大鼠随机分为正常对照组和造模组。禁食12小时后,造模组大鼠一次性腹腔注射1%的链脲佐菌素(溶解于PH值为4.5的柠檬酸钠缓冲液)溶液,剂量为85mg/kg,正常对照组大鼠注射等量柠檬酸钠缓冲液。注射STZ 3天后,使用罗氏血糖仪(德国)检测各组大鼠空腹血糖(FBG)。FBG≥16.7mmol/L的大鼠为糖尿病动物。
2.分组和给药方法 将糖尿病模型动物随机分为糖尿病组、卡托普利组(50mg/kg),鱼腥草素钠小剂量组(50mg/kg)、鱼腥草素钠大剂量组(100mg/kg),正常对照组和模型组大鼠灌胃给予蒸馏水,其余各组大鼠按剂量分别灌胃给药,给药体积为1mL/100g,每天一次,连续给药26天。
3.动物处理与样本采集方法 在实验结束时,大鼠禁食12小时后,称量体重(BM),所有大鼠均腹腔注射乌拉坦麻醉(1g/kg),记录心电图(ECG)。腹主动脉取血后,在1972g的速度下离心10分钟收集血清;分离心脏组织后称取左心室重量(LVM),并计算左心重指数(LVMI=LVM/BM),心脏组织与血清储存于-80℃的冰箱中备用。
4.观察指标和检测方法
4.1空腹血糖值的测量:使用日立7080生化分析仪测定各组大鼠血清中FBG,根据测量结果对各组大鼠的空腹血糖水平进行评价。
4.2血脂水平测量:血清中甘油三酯(TG)和总胆固醇(TC)的含量使用日立7080生化分析仪来测定;血清低密度脂蛋白胆固醇(LDL-C)和高密度脂蛋白胆固醇(HDL-C)水平使用相应试剂盒在酶标仪上进行检测,操作遵循试剂盒说明书。
4.3血清MDA含量测定:采用试剂盒以酶标仪采用DTNB法检测血清中MDA含量。具体操作遵循试剂盒说明书。
4.4心脏损伤标志物的检测:使用日立7080生化分析仪对血清丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)进行检测。用酶联免疫吸附法测定血清中BNP含量,按试剂盒说明书进行操作。
4.5心电图的评估:大鼠心电图使用RM6240B型多通道生物信号***记录。统计心率、P-R、QRS波段、S-T和Q-T间期来评价各组大鼠心电图的改变。
4.6心肌组织ATP酶活性的测定:心肌组织匀浆后,用酶标仪以定磷法测定心肌组织匀浆液中ATP酶活性,包括Na+-K+-ATPase和Ca2+-Mg2+-ATPase。操作步骤遵循试剂盒说明书。
4.7心肌组织总腺苷和磷酸肌酸含量的测定:将配好的0.4mol/L高氯酸溶液预冷,然后放入心肌组织进行匀浆,低温离心(12000rpm,15min,4℃)后取上清液,用磷酸氢二钠溶液调节PH值至中性,于低温下再次15min离心取上清液,得到浓度为92.31mg/mL的心肌组织匀浆液。用高效液相色谱法测定心脏组织中的能量物质水平。使用的流动相A为甲醇-磷酸盐缓冲液(10mmol/L,pH=6.2),B为水/甲醇/乙腈(2:1:1,v/v/v)的混合溶液,采用梯度洗脱;检测波长为210nm、254nm;柱温为15℃;进样量为5μL。检测指标包括磷酸肌酸(phosphocreatine,PCr)、三磷酸腺苷(adenosine triphosphate,ATP)、二磷酸腺苷(asenosine diphosphate,ADP)和一磷酸腺苷(adenosine monophosphate,AMP),并计算总腺嘌呤核苷酸(total adenine nucleotides,TAN,TAN=ATP+ADP+AMP)及AMP/ATP比值。
4.8对心肌组织中AMPK-α2、PPAR-α和PGC-1α的mRNA表达的测定:心脏组织中总RNA的提取使用新鲜动物组织和细胞总RNA抽提试剂盒,使用2XComSYBR qPCR Mix(ROX+)试剂盒检测心肌组织中AMPK-α2、PPAR-α、PGC-1α和内参基因(Actb)的mRNA表达,所有操作遵循试剂盒说明书。实验中所使用的引物序列见下表:
表1 PCR引物序列
4.9统计分析方法:所有数据以均数±标准误的形式来表示。方差齐性者,采用单因素方差分析,组间两两比较使用LSD法,方差不齐者,采用秩和检验,使用SPSS 21.0软件统计,P<0.05视为具有统计学差异。
实验结果
1.空腹血糖水平 各组大鼠空腹血糖水平如表2所示。与正常对照组相比,模型组大鼠的空腹血糖水平明显升高(P<0.01);与模型组相比,给药26天后,100mg/kg鱼腥草素钠组大鼠空腹血糖水平明显降低(P<0.01)。提示鱼腥草素钠有一定的降低血糖作用。
表2空腹血糖值(n=8)
与正常组比,##P<0.01,与模型组比,**P<0.01.
2.血脂水平 各组大鼠的血脂水平如表3所示。与正常对照组相比,模型组大鼠血清中TG、TC、LDL-C和HDL-C水平显著升高(P<0.01)。给药治疗26天后,卡托普利能明显降低大鼠血清中TG和LDL水平(P<0.05,P<0.01);50mg/kg和100mg/kg的鱼腥草素钠皆可降低大鼠血清中TG、TC、HDL和LDL水平(P<0.05,P<0.01)。表明鱼腥草素钠有明显降低血脂的作用。
表3血脂水平(n=8)
与正常组比,##P<0.01,与模型组比,*P<0.05,**P<0.01.
3.对心肌损伤标志物的影响 与正常对照组相比,模型组大鼠血清中BNP含量显著升高,血清中ALT和AST的活性增加(P<0.01);给药26天后,卡托普利及鱼腥草素钠皆可降低糖尿病引起的大鼠血清中BNP含量的升高(P<0.01);卡托普利和50mg/kg鱼腥草素钠能降低糖尿病引起的血清中ALT和AST活性的升高(P<0.01,P<0.05);100mg/kg鱼腥草素钠能降低大鼠血清中ALT的活性(P<0.05)。结果如表4所示。表明鱼腥草素钠可明显对抗心肌细胞的损伤。
表4血清心肌酶及生物标志物结果(n=8)
与正常组比,##P<0.01,与模型组比,*P<0.05,**P<0.01.
4.心电图 如表5-1,5-2所示,实验末期,模型组大鼠心电图显示P-R、QRS波群、S-T和Q-T间期明显延迟(P<0.01),且心率明显减慢(P<0.01);给药治疗26天后,卡托普利和鱼腥草素钠皆可缩短糖尿病引起的P-R和QRS波群间期延迟(P<0.01),并且能逆转糖尿病引起的心率减慢(P<0.01)。
表5-1心电图指标(n=7~8)
与正常组比,#P<0.05,##P<0.01,与模型组比,**P<0.01.
表5-2心电图指标(n=7~8)
与正常组比,##P<0.01,与模型组比,**P<0.01.
5.血清MDA含量 与正常对照组相比,模型组大鼠血清中MDA含量显著升高(P<0.01);与模型组相比,在给药治疗26天后,卡托普利与鱼腥草素钠均能降低大鼠血清中MDA的含量(P<0.01),结果见表6。提示鱼腥草素钠可抑制糖尿病引起的过氧化。
表6血清MDA含量结果(n=8)
与正常组比,##P<0.01,与模型组比,**P<0.01.
6.心肌组织ATP酶活性 实验结束时,模型组大鼠心肌组织中Na+-K+-ATPase和Ca2 +-Mg2+-ATPase活性明显低于正常对照组(P<0.01);与模型组相比,在给药治疗26天后,卡托普利组和鱼腥草素钠50mg/kg剂量组的大鼠心肌组织中Ca2+-Mg2+-ATPase的活性增加(P<0.01,P<0.05),Na+-K+-ATPase活性无明显变化,结果如表7所示。表明鱼腥草素钠通过对心肌线粒体的保护,对ATP酶活性的提高,改善心肌能量代谢。
表7心肌组织ATP酶活性(n=8)
与正常组比,##P<0.01,与模型组比,**P<0.01.
7.心肌组织中能量物质水平 与正常组相比,在造模29天以后,模型组大鼠心肌组织中ATP、ADP、AMP、TAN和PCr的含量皆显著降低(P<0.01,P<0.05);相比于模型组,经卡托普利治疗的大鼠心肌组织中ATP、ADP、TAN和PCr的含量皆显著升高(P<0.01);50mg/kg剂量的鱼腥草素钠显著升高了大鼠心肌组织中ATP、ADP、TAN和PCr的含量(P<0.01);100mg/kg剂量的鱼腥草素钠显著升高了大鼠心肌组织中ATP、ADP和TAN的含量(P<0.01),并且,卡托普利组和鱼腥草素钠组的AMP/ATP比值显著降低(P<0.01),结果见表8-1,8-2。表明鱼腥草素钠心肌能量代谢具有改善作用。
表8-1心肌组织中总腺苷和磷酸肌酸水平(n=8)
与正常组比,#P<0.05,##P<0.01,与模型组比,**P<0.01.
表8-2心肌组织中总腺苷和磷酸肌酸水平(n=8)
与正常组比,##P<0.01,与模型组比,**P<0.01.
8.对心肌组织中AMPK-α2、PPAR-α和PGC-1αmRNA表达的影响 与正常组相比,模型组大鼠的心肌组织中AMPK-α2和PGC-1αmRNA表达升高(P<0.05);与模型组相比,卡托普利组和鱼腥草素钠100mg/kg剂量组大鼠的心肌组织AMPK-α2和PGC-1αmRNA表达降低(P<0.05),鱼腥草50mg/kg剂量组大鼠心肌组织中AMPK-α2mRNA表达降低(P<0.05)。结果见表9。表明鱼腥草素钠通过调控AMPK信号通路来改善糖尿病引起心肌能量代谢紊乱从而对抗高血糖引起的心肌损伤乃至心衰。
表9心肌组织中AMPK-α2、PPAR-α和PGC-1α的mRNA相对表达水平
各组的mRNA相对表达量以相对于正常组表达量的倍数来表示。与正常组比,#P<0.05,与模型组比,*P<0.05.
总结
由上述实验结果表明:对于糖尿病心脏病模型大鼠,表现出高血糖、高血脂、血清心肌酶及氧化应激指标的异常、心率的减慢、心电图的异常、血清脑钠肽水平的升高;心肌能量代谢物质异常,表明糖尿病模型动物心肌损伤的发生,模型成功;心肌ATP酶活性降低,心肌AMPKα2、PGC-1αmRNA表达的升高,提示模型动物心肌线粒体受损及心肌AMPK通路出现表达升高。而经鱼腥草素钠干预后,血糖降低,氧化应激及血脂水平下降、心肌损伤、心脏功能有改善作用,鱼腥草素钠产生的这些效应是通过上调心肌ATP酶活性及下调AMP/ATP来调控AMPK通路,进而调控心肌能量代谢而达到,对于防治或延缓糖尿病心肌病的发生、发展,减少心糖尿病引起的心律失常、泵血功能降低等的发生率具有重要意义和应用价值。
本发明经实验证实:(1)鱼腥草素钠对糖尿病心脏病有防治作用,有心脏保护效果;(2)可调控心肌能量代谢紊乱;(3)可降低糖尿病引起血脂升高,有一定的降低血糖作用。在制备用于防治糖尿病引起的心脏损伤、心肌能量代谢紊乱、糖脂代谢异常等的产品方面具有良好的临床应用前景。
最后,需要在此指出的是:以上仅是本发明的实施例,只用于对本发明的技术方案作进一步详细地说明,不能理解为对本发明保护范围的限制,本领域的技术人员根据本发明的上述内容作出的一些非本质的改进和调整均属于本发明的保护范围。
Claims (6)
1.鱼腥草素钠在制备用于防治糖尿病心脏病产品中的应用。
2.鱼腥草素钠在制备防治糖尿病引起的血糖升高产品中的应用。
3.鱼腥草素钠在制备防治糖尿病引起的血脂升高及相关性疾病产品中的应用。
4.鱼腥草素钠在制备改善糖尿病引起的心肌能量代谢紊乱产品中的应用。
5.根据权利要求1~4之一所述的应用,其特征在于,产品包括药物、制剂或保健品中的一种。
6.根据权利要求1~4之一所述的应用,其特征在于,产品中还包括药学上或食品学上可接受的载体。
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