CN112755018A - 漆黄素在制备防治尿酸性肾病的药物中的用途 - Google Patents
漆黄素在制备防治尿酸性肾病的药物中的用途 Download PDFInfo
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Abstract
本发明涉及漆黄素在制备防治尿酸性肾病的药物中的用途,属于医药领域。本发明提供了漆黄素或其盐在制备治疗和/或预防尿酸性肾病的药物中的用途。动物实验证明,漆黄素能够调节肾脏尿酸转运体URAT1、OAT1、OAT3、ABCG2蛋白表达,提高尿酸排泄率,明显降低血肌酐、血尿素氮、血尿酸水平,还具有抑制肾间质纤维化的作用,能够显著降低α‑SMA、collagen I、fibronectin等纤维化相关蛋白的表达量,对尿酸性肾病的预防/治疗作用确切,为临床用药提供了新选择。
Description
技术领域
本发明涉及漆黄素在制备防治尿酸性肾病的药物中的用途,属于医药领域。
背景技术
尿酸性肾病是嘌呤代谢异常,血尿酸升高所引起的肾脏损害,早期可表现为尿浓缩功能减退,其后逐步出现肾小球滤过率下降,血肌酐升高,导致慢性肾功能不全。近年来,随着高尿酸血症发病率的日益提高,尿酸性肾病发病率显著逐年增高。因此,寻求尿酸性肾病的有效治疗药物,具有重要意义。
既往的研究证实,降低血尿酸水平可以延缓肾脏疾病的进展,因此,治疗尿酸性肾病重在降低血尿酸水平,防止尿酸盐沉积在肾脏。目前,临床上用于降尿酸的一线药物是别嘌呤醇,但其可引起皮肤过敏、骨髓抑制等不良反应,尤其是Stevens-Johnson综合征和中毒性表皮坏死松解,其死亡率达10%~40%,这些不良反应在一定程度上限制了别嘌呤醇的临床应用。而且,别嘌呤醇经肾脏代谢,对于肾功能不全患者往往需要根据肾小球滤过率调整剂量,否则患者不易耐受。鉴于别嘌呤醇存在的上述缺陷,亟需开发出新的替代药物。
漆黄素是一种广泛存在于天然产物中的类黄酮化合物,化学名为3,3',4',7-四羟基黄酮,分子式为C15H10O6,分子量为286.24,化学结构如下:
漆黄素广泛分布于蔬菜和水果中,质量分数高达2~160μg/g。现代药理研究表明,漆黄素具有多种药理活性,如抗肿瘤、抗氧化、抗衰老等作用。
发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。为此,本发明的目的在于提供漆黄素在制备防治尿酸性肾病的药物中的用途。
本发明提供了漆黄素或其盐在制备治疗和/或预防尿酸性肾病的药物中的用途。
进一步地,所述药物降低血肌酐、血尿素氮和/或血尿酸水平。
进一步地,所述药物提高肾脏尿酸排泄率。其中,所述药物上调OAT1、OAT3、ABCG2蛋白的表达水平,下调URAT1蛋白的表达水平。
进一步地,所述药物抑制肾间质纤维化。其中,所述药物降低α-SMA、COL-1和/或FN蛋白的表达量。
本发明提供了漆黄素或其盐在制备降低血尿酸水平的药物中的用途。
本发明提供了漆黄素或其盐在制备抗肾间质纤维化的药物中的用途。
进一步地,所述的药物是以漆黄素或其盐为活性成分,加入药学上可接受的辅料或者辅助性成分制备而成的制剂。
进一步地,所述的制剂为口服制剂或注射制剂。
进一步地,所述口服制剂每单位制剂含有漆黄素5.5~11mg。
动物实验证明,漆黄素在给药剂量为50~100mg/kg/d时对小鼠尿酸性肾病能够发挥显著的预防和治疗作用。按成人体重70kg计算,换算出成人每天给药剂量范围为5.5mg~11mg。本发明所述每单位制剂对应成人每天给药剂量。
术语“药学上可接受的”是指某载体、运载物、稀释剂、辅料,和/或所形成的盐、酯通常在化学上或物理上与构成某药物剂型的其它成分相兼容,并在生理上与受体相兼容。
漆黄素的盐是指本发明化合物与无机和/或有机酸和碱形成的酸式和/或碱式盐,也包括两性离子盐(内盐),还包括季铵盐,例如烷基铵盐。这些盐可以是在化合物的最后分离和纯化中直接得到。也可以是通过将上述化合物与一定数量的酸或碱适当(例如等当量)进行混合而得到。这些盐可能在溶液中形成沉淀而以过滤方法收集,或在溶剂蒸发后回收而得到,或在水介质中反应后冷冻干燥制得。本发明中所述盐可以是化合物的盐酸盐、硫酸盐、枸橼酸盐、苯磺酸盐、氢溴酸盐、氢氟酸盐、磷酸盐、乙酸盐、丙酸盐、丁二酸盐、草酸盐、苹果酸盐、琥珀酸盐、富马酸盐、马来酸盐、酒石酸盐或三氟乙酸盐。
本发明所述药学上可接受的辅料,是指除活性成分以外包含在剂型中的物质。
本发明所述药学上可接受的辅助性成分,它具有一定生理活性,但该成分的加入不会改变上述药物组合物在疾病治疗过程中的主导地位,而仅仅发挥辅助功效,这些辅助功效仅仅是对该成分已知活性的利用,是医药领域惯用的辅助治疗方式。若将上述辅助性成分与本发明药物组合物配合使用,仍然应属于本发明保护的范围。
本发明通过动物实验证明,漆黄素能够调节肾脏尿酸转运体URAT1、OAT1、OAT3、ABCG2蛋白表达,提高尿酸排泄率,明显降低血肌酐、血尿素氮、血尿酸水平,还具有抑制肾间质纤维化的作用,能够显著降低α-SMA、collagen I、fibronectin等纤维化相关蛋白的表达量,对尿酸性肾病的预防/治疗作用确切,为临床用药提供了新选择。
附图说明
图1为实施例1中小鼠的血肌酐、血尿素氮和血尿酸水平检测结果图;
图2为实施例1中小鼠肾脏尿酸转运体URAT1、OAT1、OAT3、ABCG2蛋白表达及肾脏尿酸排泄率检测结果图;
图3为实施例1中小鼠肾脏α-平滑肌肌动蛋白、I型胶原、纤连蛋白等纤维化标志蛋白表达检测结果图;
图4为实施例1中小鼠的肾脏纤维化MASSON染色图;
图5为实施例2中小鼠的血肌酐、血尿素氮和血尿酸水平检测结果图;
图6为实施例2中小鼠的肾脏纤维化MASSON染色图。
具体实施方式
目前,已报道漆黄素所具有的药理活性为抗氧化、抗炎、抗肿瘤、抗血管生成、调血脂及免疫调节,但尚无研究表明其对尿酸性肾病具有预防/治疗作用。本发明创造性地发现了漆黄素能够调节肾脏尿酸转运体表达,提高尿酸排泄率,降低血尿酸、血肌酐、血尿素氮水平,抑制肾间质纤维化,对尿酸性肾病具有确切的防治作用,开发出漆黄素新的制药用途。
下面将结合实施例对本发明的方案进行解释。本领域技术人员将会理解,下面的实施例仅用于说明本发明,而不应视为限定本发明的范围。实施例中未注明具体技术或条件的,按照本领域内的文献所描述的技术或条件或者按照产品说明书进行。所用试剂或仪器未注明生产厂商者,均为可以通过市购获得的常规产品。
实施例1漆黄素预防尿酸性肾病的作用
实验动物:SPF级雄性C57BL/6J小鼠。实验前至少1周恒温环境下标准化实验日粮饲养,饮水不限。
动物分组:将小鼠30只分为5组:①正常对照组6只;②尿酸性肾病模型组6只;③漆黄素治疗组(50mg/kg/d和100mg/kg/d)各6只;④阳性对照别嘌呤醇治疗组(10mg/kg/d)6只。
造模方法:根据小鼠体重以腺嘌呤160mg/kg、氧嗪酸钾2500mg/kg的比例,用蒸馏水将两者混合后制成终浓度为80g/L的混悬液,隔日早晚灌胃,连续28天,建立高尿酸血症肾损害动物模型。28天后处死小鼠,眼眶静脉丛取血,留取肾脏组织。
给药方法:漆黄素和别嘌呤醇治疗组于造模后第1天开始采用口服给药方式给药,隔日给药共14次;模型组造模后在相同时间灌喂同等剂量生理盐水;正常对照组在相同时间灌喂同等剂量生理盐水。
实验结果:
1、小鼠血肌酐、血尿素氮和血尿酸水平
实验动物取血后离心保留血清,使用Beckman全自动生化分析仪检测血尿酸含量,检测结果见图1。从图1可以看出,给予100mg/kg/d剂量漆黄素28天后,能显著降低血肌酐、血尿素氮和血尿酸水平。
2、小鼠肾脏尿酸转运体URAT1、OAT1、OAT3、ABCG2蛋白表达及肾脏尿酸排泄率情况
肾脏尿酸转运体URAT1、OAT1、OAT3、ABCG2等参与肾脏对血尿酸稳态调节的过程。从图2可以发现,100mg/kg/d的漆黄素显著上调OAT1、OAT3、ABCG2蛋白并下调URAT1蛋白表达水平,并增强尿酸在肾脏的排泄。
3、Western Blot检测α-平滑肌肌动蛋白(α-SMA)、I型胶原(COL-1)、纤连蛋白(FN)等纤维化标志蛋白的表达情况
α-SMA、COL-1、FN蛋白的表达量能够反映肾间质纤维化的程度。从图3可以看出,给予100mg/kg/d剂量漆黄素28天后,能显著抑制α-SMA、COL-1、FN蛋白的表达,防治肾间质纤维化的作用非常明显。
4、MASSON染色
从图4可以看出,正常对照组的染色图片具有完整的肾脏结构,没有明显的肾小管变性、坏死,管状萎缩,没有炎性细胞浸润和纤维化。尿酸性肾病模型组可见肾小管有明显的扩张,MASSON染色蓝色区域明显(蓝色区域表示纤维化病变的程度)。给予100mg/kg/d漆黄素28天后,虽然肾小管仍有扩张,但MASSON染色蓝色区域明显少于模型组。
以上结果表明,漆黄素可以显著抑制尿酸性肾病小鼠肾间质纤维化的程度。
实施例2漆黄素治疗尿酸性肾病的作用
实验动物:SPF级雄性C57BL/6J小鼠。实验前至少1周恒温环境下标准化实验日粮饲养,饮水不限。
动物分组:将小鼠24只分为4组:①正常对照组6只;②尿酸性肾病模型组6只;③漆黄素治疗组(100mg/kg/d)6只;④别嘌呤醇治疗组(10mg/kg/d)6只。造模方法:根据小鼠体重以腺嘌呤160mg/kg、氧嗪酸钾2500mg/kg的比例,用蒸馏水将两者混合后制成终浓度为80g/L的混悬液,隔日早晚灌胃,连续14天,建立高尿酸血症肾损害动物模型。28天后处死小鼠,眼眶静脉丛取血,留取肾脏组织。
给药方法:漆黄素和别嘌呤醇治疗组于造模后第15天开始采用口服给药方式给药,连续14天;模型组造模后在相同时间灌喂同等剂量生理盐水;正常对照组在相同时间灌喂同等剂量生理盐水。
实验结果:
1、小鼠血肌酐、血尿素氮和血尿酸水平
实验动物取血后离心保留血清,使用Beckman全自动生化分析仪检测血尿酸含量,检测结果见图5。从图5可以看出,尿酸性肾病小鼠经100mg/kg/d剂量漆黄素治疗14天,能显著降低血肌酐、血尿素氮和血尿酸水平。
2、MASSON染色
从图6可以看出,正常对照组的染色图片具有完整的肾脏结构,没有明显的肾小管变性、坏死,管状萎缩,没有炎性细胞浸润和纤维化。尿酸性肾病模型组可见肾小管有明显的扩张,肾小球萎缩,MASSON染色蓝色区域明显(蓝色区域表示纤维化病变的程度)。经100mg/kg/d漆黄素治疗14天后,虽然肾小管仍有扩张,但MASSON染色蓝色区域明显少于模型组。
以上结果表明,漆黄素对尿酸性肾病小鼠的肾间质纤维化有明显的治疗作用。
需要说明的是,本说明书中描述的具体特征、结构、材料或者特点可以在任一个或多个实施例中以合适的方式结合。此外,在不相互矛盾的情况下,本领域的技术人员可以将本说明书中描述的不同实施例以及不同实施例的特征进行结合和组合。
Claims (9)
1.漆黄素或其盐在制备治疗和/或预防尿酸性肾病的药物中的用途。
2.如权得要求1所述的用途,其特征是:所述药物降低血肌酐、血尿素氮和/或血尿酸水平。
3.如权得要求1所述的用途,其特征是:所述药物提高肾脏尿酸排泄率。
4.如权得要求1所述的用途,其特征是:所述药物抑制肾间质纤维化。
5.漆黄素或其盐在制备降低血尿酸水平的药物中的用途。
6.漆黄素或其盐在制备抗肾间质纤维化的药物中的用途。
7.如权利要求1~6任意一项所述的用途,其特征是:所述的药物是以漆黄素或其盐为活性成分,加入药学上可接受的辅料或者辅助性成分制备而成的制剂。
8.如权利要求7所述的用途,其特征是:所述的制剂为口服制剂或注射制剂。
9.如权利要求8所述的用途,其特征是:所述口服制剂每单位制剂含有漆黄素5.5~11mg。
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