目的:观察红曲红色素组分Ⅰ(Monascus red pigments section I,MRPI)对实验小鼠血脂代谢的影响。方法:昆明种雌性小鼠48只,按血脂水平分为6组:正常对照组、高脂对照组、绞股蓝总甙阳性对照组、MRPI低、中、高剂量组。正常对照组喂饲基...目的:观察红曲红色素组分Ⅰ(Monascus red pigments section I,MRPI)对实验小鼠血脂代谢的影响。方法:昆明种雌性小鼠48只,按血脂水平分为6组:正常对照组、高脂对照组、绞股蓝总甙阳性对照组、MRPI低、中、高剂量组。正常对照组喂饲基础饲料,其它各组喂饲高脂饲料;按剂量分别灌胃给药6w,禁食12h后,测定小鼠血脂水平和相关指标。结果:实验6w末,MRPI低、中、高各剂量(10、50、100mg/kg·d)组使实验小鼠血清AI值(TC-HDL-C/HDL-C)均极显著低于高脂组(p<0.01);MRPI中、高各剂量组和绞股蓝总甙阳性对照组使实验小鼠血清TC、血清TG、血清LDL-C和肝组织TC均极显著低于高脂组(p<0.01);MRPI低、中、高剂量组血脂水平与高脂组相比,显著升高血清HDL-C。结论:提示MRPI红曲红色素组分I对实验小鼠血清血脂代谢具有良好的脂质代谢调节作用,有效抑制脂质过氧化和预防动脉粥样硬化作用,且呈剂量正相关关系。展开更多
The roles of multi-drug resistance protein 1 （MDR1）, multi-drug resistance related protein 1 （MRP1）, lung resistance protein （LRP） and breast cancer resistance protein （BCRP） in the multi-drug resistance （MDR...The roles of multi-drug resistance protein 1 （MDR1）, multi-drug resistance related protein 1 （MRP1）, lung resistance protein （LRP） and breast cancer resistance protein （BCRP） in the multi-drug resistance （MDR） of hepatocellular carcinoma （HCC） were studied. By exposing HepG2 cell line to progressively increased concentrations of adriamycin （ADM）, HepG2 multi-drug resistant subline （HepG2/ADM） was induced. The MDR index of HepG2/ADM was detected by using MTT. The expressions of the four MDR proteins in the three cell lines （L02, HepG2, HepG2/ADM） were investigated at mRNA and protein levels by real-time RT-PCR and Western blot respectively. Our results showed that when the ADM concentration was under 100 pg/L, HepG2 could easily be induced to be drug-resistant. The IC50 of the HepG2/ADM to ADM was 282 times that of HepG2. The expression of MDR1 and BCRP mRNA in HepG2/ADM cells were 400 and 9 times that of HepG2 cells respectively while there was no difference in the mRNA expressions of MRPl and LRE There was no difference between HepG2 and L02 cells in the mRNA expressions of the four genes. At the protein level, the expressions of MDRI, BCRP and LRP but MRPl in HepG2/ADM were significantly higher than those of HepG2 and L02. Between HepG2 and L02, there was no difference in the expressions of four genes at the protein level. HepG2/ADM is a good model for the study of MDR. The four genes are probably the normally expressed gene in liver. The expressions of MDRl and BCRP could be up-regulated by anti-cancer agents in vitro. The MDR of HCC was mainly due to the up-regulation of MDR1 and BCRP but MRP1 and LRE These findings suggest they may serve as targets for the reversal of MDR of HCC.展开更多
文摘目的:观察红曲红色素组分Ⅰ(Monascus red pigments section I,MRPI)对实验小鼠血脂代谢的影响。方法:昆明种雌性小鼠48只,按血脂水平分为6组:正常对照组、高脂对照组、绞股蓝总甙阳性对照组、MRPI低、中、高剂量组。正常对照组喂饲基础饲料,其它各组喂饲高脂饲料;按剂量分别灌胃给药6w,禁食12h后,测定小鼠血脂水平和相关指标。结果:实验6w末,MRPI低、中、高各剂量(10、50、100mg/kg·d)组使实验小鼠血清AI值(TC-HDL-C/HDL-C)均极显著低于高脂组(p<0.01);MRPI中、高各剂量组和绞股蓝总甙阳性对照组使实验小鼠血清TC、血清TG、血清LDL-C和肝组织TC均极显著低于高脂组(p<0.01);MRPI低、中、高剂量组血脂水平与高脂组相比,显著升高血清HDL-C。结论:提示MRPI红曲红色素组分I对实验小鼠血清血脂代谢具有良好的脂质代谢调节作用,有效抑制脂质过氧化和预防动脉粥样硬化作用,且呈剂量正相关关系。
基金This project was supported by a grant from the Foundation for Key Scientific Research Programs of Ministry of Health of China (No. 20012003)
文摘The roles of multi-drug resistance protein 1 （MDR1）, multi-drug resistance related protein 1 （MRP1）, lung resistance protein （LRP） and breast cancer resistance protein （BCRP） in the multi-drug resistance （MDR） of hepatocellular carcinoma （HCC） were studied. By exposing HepG2 cell line to progressively increased concentrations of adriamycin （ADM）, HepG2 multi-drug resistant subline （HepG2/ADM） was induced. The MDR index of HepG2/ADM was detected by using MTT. The expressions of the four MDR proteins in the three cell lines （L02, HepG2, HepG2/ADM） were investigated at mRNA and protein levels by real-time RT-PCR and Western blot respectively. Our results showed that when the ADM concentration was under 100 pg/L, HepG2 could easily be induced to be drug-resistant. The IC50 of the HepG2/ADM to ADM was 282 times that of HepG2. The expression of MDR1 and BCRP mRNA in HepG2/ADM cells were 400 and 9 times that of HepG2 cells respectively while there was no difference in the mRNA expressions of MRPl and LRE There was no difference between HepG2 and L02 cells in the mRNA expressions of the four genes. At the protein level, the expressions of MDRI, BCRP and LRP but MRPl in HepG2/ADM were significantly higher than those of HepG2 and L02. Between HepG2 and L02, there was no difference in the expressions of four genes at the protein level. HepG2/ADM is a good model for the study of MDR. The four genes are probably the normally expressed gene in liver. The expressions of MDRl and BCRP could be up-regulated by anti-cancer agents in vitro. The MDR of HCC was mainly due to the up-regulation of MDR1 and BCRP but MRP1 and LRE These findings suggest they may serve as targets for the reversal of MDR of HCC.
