Background:Exploring the protective mechanism of the Liangxue Huayu(LXHY)decoction on human retinal pigment epithelial(RPE)cells induced by hypoxia through the autophagy pathway.Methods:The appropriate LXHY decoction ...Background:Exploring the protective mechanism of the Liangxue Huayu(LXHY)decoction on human retinal pigment epithelial(RPE)cells induced by hypoxia through the autophagy pathway.Methods:The appropriate LXHY decoction concentration was determined by CCK-8.ARPE-19 cells were divided into the normal control group(A group),CoCl_(2)group(B group),3-Methyladenine(3-MA)group(treated with 3-MA(the inhibition of autophagy pathway))(C group),blank serum(BS)group(D group),LXHY drug-contained serum(DCS)group(E group),and Rapamycin(RAP)group[treated with LXHY drug-contained serum combined with rapamycin group(the activation of autophagy pathway)](F group).Counting the number of autophagosomes and autolysosomes in each group of cells under transmission electron microscopy.After infection of cells in each group by mRFP-GFP-LC3 fusion protein adenovirus,the strength of autophagic flux was detected.The mRNA expression levels of LC3 and Beclin-1 were detected by Q-PCR.Results:CCK-8 assay results showed that LXHY DCS could inhibit the cell proliferation of ARPE-19 under hypoxia(all P<0.05).As the transmission electron microscopy assay result showed,compared with the normal control group,the number of autolysosomes was significantly increased in the CoCl_(2)group(P<0.05).Compared with CoCl_(2)group,the number of autolysosomes was significantly reduced the 3-Methyladenine group,blank serum group and LXHY drug-contained serum group(all P<0.001).As autophagic flux assay result showed,compared with the normal control group,the level of autophagosomes and autolysosomes were significantly risen in CoCl_(2)group(all P<0.001).Compared with the CoCl_(2)group,the level of autophagosomes and autolysosomes were significantly fell down in 3-Methyladenine group,blank serum group and LXHY drug-contained serum group(all P<0.05).The level of autolysosomes in the LXHY drug-contained serum group was lower than in the blank serum group(P<0.05).Compared with the LXHY drug-contained serum group,the levels of autophagosomes and autolysosomes were significantly risen in the LXHY drug-contained serum combined with the rapamycin group(all P<0.05).As the Q-PCR result showed,compared with the normal control group,the expression of LC3 and Beclin-1 mRNA were significantly reduced in the CoCl_(2)group(all P<0.001).Compared with the CoCl_(2)group,the expression of LC3 mRNA were significantly increased in the 3-Methyladenine group,blank serum group and LXHY drug-contained serum group(all P<0.001).Beclin-1 mRNA expression was increased significantly(all P<0.001)in the blank serum group and the LXHY drug-contained serum group.And Beclin-1 mRNA expression in the LXHY drug-contained serum group was statistically significant increased than blank serum group(P<0.001).In the LXHY drug-contained serum combined with the rapamycin group,the LC3 and Beclin-1 mRNA expression was reduced significantly compared with the LXHY drug-contained serum group(all P<0.001).Conclusion:The LXHY DCS has the ability to protect the human retinal pigment epithelial cell(ARPE-19)damage under hypoxia through the autophagy pathway.展开更多
基金support of the foundation projects:Fujian Province Traditional Chinese Medicine Research Project Plan(No.2021ZYJC08).
文摘Background:Exploring the protective mechanism of the Liangxue Huayu(LXHY)decoction on human retinal pigment epithelial(RPE)cells induced by hypoxia through the autophagy pathway.Methods:The appropriate LXHY decoction concentration was determined by CCK-8.ARPE-19 cells were divided into the normal control group(A group),CoCl_(2)group(B group),3-Methyladenine(3-MA)group(treated with 3-MA(the inhibition of autophagy pathway))(C group),blank serum(BS)group(D group),LXHY drug-contained serum(DCS)group(E group),and Rapamycin(RAP)group[treated with LXHY drug-contained serum combined with rapamycin group(the activation of autophagy pathway)](F group).Counting the number of autophagosomes and autolysosomes in each group of cells under transmission electron microscopy.After infection of cells in each group by mRFP-GFP-LC3 fusion protein adenovirus,the strength of autophagic flux was detected.The mRNA expression levels of LC3 and Beclin-1 were detected by Q-PCR.Results:CCK-8 assay results showed that LXHY DCS could inhibit the cell proliferation of ARPE-19 under hypoxia(all P<0.05).As the transmission electron microscopy assay result showed,compared with the normal control group,the number of autolysosomes was significantly increased in the CoCl_(2)group(P<0.05).Compared with CoCl_(2)group,the number of autolysosomes was significantly reduced the 3-Methyladenine group,blank serum group and LXHY drug-contained serum group(all P<0.001).As autophagic flux assay result showed,compared with the normal control group,the level of autophagosomes and autolysosomes were significantly risen in CoCl_(2)group(all P<0.001).Compared with the CoCl_(2)group,the level of autophagosomes and autolysosomes were significantly fell down in 3-Methyladenine group,blank serum group and LXHY drug-contained serum group(all P<0.05).The level of autolysosomes in the LXHY drug-contained serum group was lower than in the blank serum group(P<0.05).Compared with the LXHY drug-contained serum group,the levels of autophagosomes and autolysosomes were significantly risen in the LXHY drug-contained serum combined with the rapamycin group(all P<0.05).As the Q-PCR result showed,compared with the normal control group,the expression of LC3 and Beclin-1 mRNA were significantly reduced in the CoCl_(2)group(all P<0.001).Compared with the CoCl_(2)group,the expression of LC3 mRNA were significantly increased in the 3-Methyladenine group,blank serum group and LXHY drug-contained serum group(all P<0.001).Beclin-1 mRNA expression was increased significantly(all P<0.001)in the blank serum group and the LXHY drug-contained serum group.And Beclin-1 mRNA expression in the LXHY drug-contained serum group was statistically significant increased than blank serum group(P<0.001).In the LXHY drug-contained serum combined with the rapamycin group,the LC3 and Beclin-1 mRNA expression was reduced significantly compared with the LXHY drug-contained serum group(all P<0.001).Conclusion:The LXHY DCS has the ability to protect the human retinal pigment epithelial cell(ARPE-19)damage under hypoxia through the autophagy pathway.
