CN110876801A - GM-CSF与Dencichine联用在制备治疗炎性肠病药物中的用途 - Google Patents
GM-CSF与Dencichine联用在制备治疗炎性肠病药物中的用途 Download PDFInfo
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Abstract
本发明涉及生物医药领域,具体涉及GM‑CSF与Dencichine联用在制备治疗炎性肠病药物中的用途。
Description
技术领域
本发明涉及生物医药领域,具体涉及GM-CSF与Dencichine联用在制备治疗炎性肠病药物中的用途。
背景技术
炎性肠病(inflammatory bowel disease,IBD)是以肠道非特异性炎症损伤为特征的慢性复发性疾病,包括溃疡性结肠炎(ulcerative colitis,UC)和克罗恩病(Crohn'sdisease)。通过肠镜检查,可以观察到肠粘膜充血、水肿、颗粒样改变甚至溃疡形成;在组织病理学上病变区域广泛溃疡形成伴有大量中性粒细胞浸润和肠粘膜坏死。然而,炎性肠病的发病机理目前并没有明确的定论,可能与基因易感性、外界环境刺激、自身免疫以及肠道菌群失调有关。
Dencichin是从三七中分离得到的非蛋白氨基酸,能够抑制 HIF-prolylhydroxylase-2(PHD-2)的活性,并且显着抑制HBZY-1细胞的细胞增殖和细胞外基质(ECM)蛋白积聚,减少胶原蛋白I(Col I), IV型胶原蛋白(Col IV)和纤维连接蛋白的分泌(FN)。同时,Dencichin 还可改善继发于II型糖尿病模型的糖尿病肾病的代谢紊乱。
粒细胞巨噬细胞集落刺激因子(GM-CSF)是一种造血生长因子,在体外可刺激中性粒细胞和巨噬细胞的集落形成,并具有促进早期红巨核细胞、嗜酸性祖细胞增殖和发育的功能。有公开文献报道 GM-CSF对DSS诱导的小鼠肠炎有一定预防和治疗作用。在我们的实验体系中,GM-CSF对DSS所导致的小鼠肠道损伤具有一定保护作用,但效果不稳定,在生存期实验中我们发现个别经GM-CSF处理小鼠比对照小鼠死亡更快。因此,发明人致力于寻找另一种药物与 GM-CSF联用,寄希望于其能与GM-CSF发挥协同效果,降低其潜在的毒性/风险。
发明内容
本发明要解决的技术问题是:提供一种降低GM-CSF在治疗肠炎过程中潜在毒性/风险的药物联用方案。
在本发明的第一方面,提供了GM-CSF与Dencichine或其药学上可接受的盐联用在制备治疗炎性肠病药物中的用途。
GM-CSF对DSS所导致的小鼠肠道损伤具有一定保护作用,但效果不稳定,在生存期实验中我们发现个别经GM-CSF处理小鼠比对照小鼠死亡更快。发明人意外发现,将Dencichine与GM-CSF联用能够显著降低GM-CSF在治疗肠炎过程中潜在毒性/风险。
本发明的第二方面提供了一种药物组合物,其含有治疗量的 GM-CSF、Dencichine或其药学上可接受的盐及药学上可接受的辅料。
优选的,所述组合物中GM-CSF与Dencichine或其药学上可接受的盐的质量比为1:1×103~1×105;进一步的,所述组合物中 GM-CSF与Dencichine或其药学上可接受的盐的质量比为1:2×103~1 ×105。
本发明的有益效果在于首次发现并证实了GM-CSF与Dencichine 联用对Dss诱导的小鼠肠炎具有良好的治疗效果,且能够显著降低 GM-CSF在治疗肠炎过程中潜在毒性/风险。
附图说明
图1为第一对照组(n=9)、第二对照组(n=6)、第三对照组(n=6) 与处理组(n=6)小鼠从口服DSS饮用水开始的生存期折线图;
图2为第一对照组(n=6)与处理组(n=6)小鼠口服DSS饮用水7天后小鼠外周血中红细胞数量对比散点图;
图3为第一对照组(n=9)与处理组(n=6)小鼠口服DSS饮用水7天后小鼠外周血中红细胞红细胞比容对比散点图。
具体实施方式
以下结合实例说明本发明,但不限制本发明。在本领域内,技术人员对本发明所做的简单替换或改进均属于本发明所保护的技术方案内。
实施例1
材料与方法:
小鼠:雄性野生型C57小鼠(6-8周)购于中国科学院(上海)。所有小鼠均饲养于第二军医大学(上海)动物实验中心无特殊病原体 (SPF)实验室。
处理组小鼠连续4天给予100μg/kg/d GM-CSF(杭州开华生物科技有限公司)腹腔注射+5mg/ml Dencichine(上海源溪生物科技有限公司)饮用水喂养,4天后给予1.5%DSS(40,000kDa;ICN Biochemicals)饮用水口服7天后转为正常饮用水。GM-CSF的给药量根据小鼠体重差别每只约给药2~5μg;Dencichine给药量根据小鼠的饮水量约为10~200mg。
第一对照组小鼠与处理组小鼠同一时间给予1.5%DSS饮用水口服7天后转为正常饮用水。
第二对照组连续4天给予100ug/kg/d GM-CSF(杭州开华生物科技有限公司)腹腔注射,4天后给予1.5%DSS饮用水口服7天后转为正常饮用水。
第三对照组连续4天给予5mg/ml Dencichine(上海源溪生物科技有限公司)饮用水喂养,4天后给予1.5%DSS饮用水口服7天后转为正常饮用水。
生存期实验:记录对照组与处理组小鼠口服DSS饮用水15天后的生存期。具体的,实验组小鼠的平均生存时间为12.8天,其中,第一对照组小鼠的平均生存时间为9.2天;第二对照组小鼠的平均生存时间为11.5天;第三对照组小鼠的平均生存时间为11.5天。
外周血分析:第一对照组(n=6)与处理组(n=6)小鼠饮1.5%DSS 水第7天,小鼠在麻醉状态下,使用毛细管对小鼠进行眼球去除取血,将血置入带有K2-EDTA的离心管(EP管)。通过第二军医大学动物实验中心实验室的标准血液学分析仪确定红细胞和血细胞压积。
结果:GM-CSF+Dencichine小鼠生存期好于第一、第二和第三对照组小鼠(图1)。第一对照组小鼠贫血症状比GM-CSF+Dencichine 小鼠更严重,并且GM-CSF+Dencichine小鼠外周血RBC和HCT均高于对照组小鼠(图2、3)。
为了验证GM-CSF+Dencichine小鼠生存期改善是否由于单纯剂量原因导致,发明人再额外设置了第二对照组和第三对照组的高剂量组,其中第二对照组高剂量组连续4天给予150ug/kg/d GM-CSF腹腔注射,该组小鼠的平均生存时间为11.1天,较正常剂量组反而略有降低;第三对照组的高剂量组连续4天给予6mg/ml Dencichine饮用水喂养,该组小鼠的平均生存时间为11.7天。
实施例2
细胞毒性实验
材料与方法:将体外培养生长至90%汇合状态的IEC-6肠上皮细胞以0.25%胰酶/0.1%EDTA消化并接种于96孔细胞培养板,每孔细胞数为2×103。培养次日去除原培养基,每孔加入待测化合物工作液继续培养,其中处理组加入含1×10-5mol/L的Dencichine和1×10-5mol/L的GM-CSF的混合溶液;第二对照组加入含1×10-5mol/L 的GM-CSF;第三对照组加入含1×10-5mol/L的Dencichine。于IEC-6 细胞与待测药物共培养后的24h通过MTT法检测待测药物对细胞的毒性(n=5)。其结果如表1所示:
表1
处理组 | 第二对照组 | 第三对照组 | |
24h细胞存活率 | 91% | 75% | 88% |
结论:GM-CSF虽然对DSS所导致的小鼠肠道损伤具有一定保护作用,但效果不稳定,在生存期实验中我们发现个别经GM-CSF 处理小鼠比对照小鼠死亡更快,其原因可能是GM-CSF对IEC-6肠上皮细胞有一定的毒性。加入Dencichine后,两种药物组合后明显提高了IEC-6肠上皮细胞的存活率,甚至略高于仅加入Dencichine的第三对照组的存活率,这可能是GM-CSF+Dencichine联用对Dss诱导的小鼠肠炎具有良好的治疗效果的原因之一。
以上所述的仅是本发明的优选实施方式,应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。
Claims (3)
1.GM-CSF与Dencichine或其药学上可接受的盐联用在治疗炎性肠病中的用途。
2.一种药物组合物,其特征在于含有治疗量的GM-CSF、Dencichine或其药学上可接受的盐及药学上可接受的辅料。
3.如权利要求1所述的药物组合物,其特征在于所述组合物中GM-CSF与Denichine或其药学上可接受的盐的质量比为1: 1×103~1×105。
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