目的探究干酪乳酪杆菌Zhang(Lacticaseibacillus casei Zhang)在小鼠胆囊胆固醇结石形成过程中对肝脏SR-BI以及小肠NPC1L1、ABCG8基因表达的影响。方法购买8周龄,体重(18.70±0.89)g,SPF级雌性C57BL/6J小鼠40只,适应性喂养1周后,称...目的探究干酪乳酪杆菌Zhang(Lacticaseibacillus casei Zhang)在小鼠胆囊胆固醇结石形成过程中对肝脏SR-BI以及小肠NPC1L1、ABCG8基因表达的影响。方法购买8周龄,体重(18.70±0.89)g,SPF级雌性C57BL/6J小鼠40只,适应性喂养1周后,称重,采用随机数表法分为基础饲料盐水对照组(G-NS组,n=10)、致石饲料盐水对照组(L-NS组,n=10)、基础饲料L.casei Zhang干预组(G-L-casei组,n=10)及致石饲料L.casei Zhang干预组(L-L-casei组,n=10)。给予G-NS组、G-L-casei组小鼠喂饲基础饲料,L-NS组、L-L-casei组小鼠喂饲致石饲料,同时给予G-L-casei组、L-L-casei组小鼠L.casei Zhang菌液灌胃,对照组小鼠灌胃等体积的生理盐水,1次/d,持续8周。饲养8周后,经内眦静脉取血后处死小鼠,检测四组小鼠甘油三酯(TG)、血清总胆固醇(CHO)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)及载脂蛋白(Apo-AI)水平。肉眼与偏光显微镜下观察小鼠胆囊胆固醇结石形成情况,分别采集小鼠肝脏和小肠组织检测SR-BI、NPC1L1、ABCG8表达水平。结果成石率:G-NS组和G-L-casei组小鼠未见胆囊结石,L-NS组、L-L.casei组小鼠均出现胆囊结石,且L-L-casei组成石率较L-NS组低。血清CHO表达水平:L-L-casei组小鼠低于L-NS组,差异有统计学意义(t=3.873,P<0.05)。血清TG水平:L-L-casei组小鼠低于L-NS组,差异有统计学意义(t=3.481,P<0.01)。血清LDL-C水平:L-L-casei组小鼠低于L-NS组(t=3.815,P<0.01)。血清HDL-C水平:L-L-casei组小鼠高于L-NS组(t=3.235,P<0.01),G-L-casei组小鼠高于G-NS组(t=2.649,P<0.05),差异均有统计学意义。血清Apo-AI水平:L-L-casei组小鼠高于L-NS组,差异有统计学意义(t=3.938,P<0.05)。RT-qPCR小肠NPC1L1表达水平:L-L-casei组低于L-NS组,差异有统计学意义(t=3.147,P<0.01),G-NS组低于L-NS组,差异有统计学意义(t=2.537,P<0.05)。RT-qPCR小肠ABCG8表达水平:L-L-casei组高于L-NS组,差异有统计学意义(t=2.829,P<0.05)。RT-qPCR肝脏SR-BI的表达水平:L-L-casei组小鼠高于L-NS组,差异有统计学意义(t=2.446,P<0.05)。结论L.casei Zhang可以有效改善小鼠血清的高脂状态,降低血清CHO、TG、LDL-C水平,升高血清HDL-C和ApoAI水平;同时可以使小肠NPC1L1表达水平降低,小肠ABCG8和肝脏SR-BI表达水平增加,降低小鼠胆囊结石形成概率。展开更多
目的:研究NPC1L1(Niemann-Pick C1 Like 1)mRNA在单纯高脂血症大鼠和动脉粥样硬化大鼠小肠组织中的表达与差异,探讨其与脂质代谢和动脉粥样硬化之间的关系。方法:通过半定量RT-PCR方法分别检测正常普食组、单纯高脂饲养组和动脉粥样大...目的:研究NPC1L1(Niemann-Pick C1 Like 1)mRNA在单纯高脂血症大鼠和动脉粥样硬化大鼠小肠组织中的表达与差异,探讨其与脂质代谢和动脉粥样硬化之间的关系。方法:通过半定量RT-PCR方法分别检测正常普食组、单纯高脂饲养组和动脉粥样大鼠组小肠组织中NPC1L1 mRNA的表达差异。结果:三个组别大鼠小肠组织中均存在NPC1L1 mRNA,单纯高脂饮食和动脉粥样大鼠小肠组织中NPC1L1 mRNA表达明显高于正常对照大鼠(P0.05)。结论:血脂代谢紊乱与小肠组织中NPC1L1的高表达有关,NPC1L1可能参与了血脂紊乱的病理生理过程:NPC1L1与促成动脉粥样硬化的发生无明显相关性。展开更多
Objective: The study aimed to explore the protective mechanism of Ganoderic acid A (GAA) in renal fibrosisand to verify that GAA can ameliorate renal fibrosis by regulating the Niemann-pick C1-like 1 (NPC1L1) gene. Meth...Objective: The study aimed to explore the protective mechanism of Ganoderic acid A (GAA) in renal fibrosisand to verify that GAA can ameliorate renal fibrosis by regulating the Niemann-pick C1-like 1 (NPC1L1) gene. Methods:Transforming growth factor beta1 (TGF-β1) was used to treat Human Kidney-2 (HK-2) cells to establish a renal fibrosismodel. The differentially expressed genes in the control (CTRL) group, TGF-β1 group, and TGF-β1 + GAA group werescreened via transcriptome sequencing technology and verified by qPCR and Western blot experiments. The NPC1L1gene overexpression plasmid was constructed. The expression levels of N-cad, E-cad, and Slug-related proteins inCTRL, TGF-β1, TGF-β1+GAA (25 μg/mL), and TGF-β1+GAA (25 μg/mL) + NPC1L1 Overexpression (OE) groupswere detected by qPCR and Western blot analysis. Western blot analysis was used to identify the extracellular matrixassociated proteins Tenascin-C, α-SMA, and fibrosis-related protein Collagen I. Fibrosis marker protein Fibronectinwas detected and quantified by immunofluorescence. Results: Transcriptomic sequencing revealed that TGF-β1stimulation led to 267 differentially regulated genes, with 118 up-regulated and 149 down-regulated, while furthermodulation of 213 genes, comprising 112 up-regulated and 101 down-regulated genes, was observed in the GAAintervention group. The target gene in these processes was found to be NPC1L1 by investigations using GeneOntology (GO) and the Kyoto Encyclopedia of Genes and Genomes (KEGG). qPCR and Western blot resultsconfirmed that TGF-β1 increased NPC1L1 expression, which was attenuated by GAA. Additionally, TGF-β1upregulated N-cad and Slug. However, GAA reversed this effect and NPC1L1 overexpression partially rescued theGAA effect. TGF-β1 also decreased E-cad expression, reversed by GAA, and NPC1L1 overexpression antagonized thisreversal. Furthermore, TGF-β1 promoted Collagen I, α-SMA, and Tenascin-C expression, and GAA reduced theselevels, effects that were reversed by NPC1L1 overexpression. Immunofluorescence results showed that TGF-β1increased fibronectin expression, which was decreased by GAA, and increased by NPC1L1 overexpression.Conclusion: GAA ameliorates renal fibrosis by antagonizing NPC1L1 gene expression inhibiting epithelialmesenchymal transition and reducing extracellular matrix formation.展开更多
基金sponsored by KeyResearch and Development Project of Science andTechnology Department of Tibet (No. XZ202201ZY0033G).
摘要Objective: The study aimed to explore the protective mechanism of Ganoderic acid A (GAA) in renal fibrosisand to verify that GAA can ameliorate renal fibrosis by regulating the Niemann-pick C1-like 1 (NPC1L1) gene. Methods:Transforming growth factor beta1 (TGF-β1) was used to treat Human Kidney-2 (HK-2) cells to establish a renal fibrosismodel. The differentially expressed genes in the control (CTRL) group, TGF-β1 group, and TGF-β1 + GAA group werescreened via transcriptome sequencing technology and verified by qPCR and Western blot experiments. The NPC1L1gene overexpression plasmid was constructed. The expression levels of N-cad, E-cad, and Slug-related proteins inCTRL, TGF-β1, TGF-β1+GAA (25 μg/mL), and TGF-β1+GAA (25 μg/mL) + NPC1L1 Overexpression (OE) groupswere detected by qPCR and Western blot analysis. Western blot analysis was used to identify the extracellular matrixassociated proteins Tenascin-C, α-SMA, and fibrosis-related protein Collagen I. Fibrosis marker protein Fibronectinwas detected and quantified by immunofluorescence. Results: Transcriptomic sequencing revealed that TGF-β1stimulation led to 267 differentially regulated genes, with 118 up-regulated and 149 down-regulated, while furthermodulation of 213 genes, comprising 112 up-regulated and 101 down-regulated genes, was observed in the GAAintervention group. The target gene in these processes was found to be NPC1L1 by investigations using GeneOntology (GO) and the Kyoto Encyclopedia of Genes and Genomes (KEGG). qPCR and Western blot resultsconfirmed that TGF-β1 increased NPC1L1 expression, which was attenuated by GAA. Additionally, TGF-β1upregulated N-cad and Slug. However, GAA reversed this effect and NPC1L1 overexpression partially rescued theGAA effect. TGF-β1 also decreased E-cad expression, reversed by GAA, and NPC1L1 overexpression antagonized thisreversal. Furthermore, TGF-β1 promoted Collagen I, α-SMA, and Tenascin-C expression, and GAA reduced theselevels, effects that were reversed by NPC1L1 overexpression. Immunofluorescence results showed that TGF-β1increased fibronectin expression, which was decreased by GAA, and increased by NPC1L1 overexpression.Conclusion: GAA ameliorates renal fibrosis by antagonizing NPC1L1 gene expression inhibiting epithelialmesenchymal transition and reducing extracellular matrix formation.