目的:通过生物信息学分析以及细胞生物学实验研究角蛋白6A(KRT6A)对胰腺导管腺癌(PDAC)诊断、预后判断、免疫微环境以及PDAC细胞PANC1增殖、凋亡等生物学行为的影响。方法:通过GEPIA平台整合TCGA(The Cancer Genome Atlas)数据库与GTEx(...目的:通过生物信息学分析以及细胞生物学实验研究角蛋白6A(KRT6A)对胰腺导管腺癌(PDAC)诊断、预后判断、免疫微环境以及PDAC细胞PANC1增殖、凋亡等生物学行为的影响。方法:通过GEPIA平台整合TCGA(The Cancer Genome Atlas)数据库与GTEx(Genotype-Tissue)数据库中的数据,分析KTRT6A在PDAC组织中的表达情况,并通过CIBERSORT工具分析KRT6A表达与PDAC组织中免疫细胞浸润的关系,然后通过GSEA方法研究与KRT6A基因表达相关的肿瘤信号通路。选取长海医院病理科保存的60例PDAC组织与癌旁组织标本进行免疫组化分析,验证KRT6A在肿瘤组织中表达情况;通过干扰RNA敲减PANC1细胞中KRT6A的表达,采用CCK-8实验以及流式细胞术检测敲减KRT6A对细胞的增殖、凋亡的影响。结果:利用TCGA与GTEx数据库数据分析发现,KRT6A在人PDAC组织中呈高表达,且与患者较差的生存期存在关联(P=0.015)。利用CIBERSORT软件以及GSEA分析发现,KRT6A高表达的PDAC组织中M2型巨噬细胞浸润性升高(P=0.034),且与Wnt通路(NES:1.7359272,P<0.05)、磷酸戊糖途径(PPP)(NES:1.5613053,P<0.05)等信号通路上调有关联(P<0.05或P<0.01);免疫组化结果进一步验证了KRT6A在PDAC组织中呈高表达(P<0.001)。增殖和凋亡实验发现,干扰KRT6A能够显著抑制PANC1细胞的增殖(P<0.05)以及凋亡(P<0.001)。结论:KRT6A在人PDAC组织中呈高表达,敲减其表达能够抑制PANC1细胞的增殖和凋亡,具有作为PDAC诊断与预后判断新靶标的潜力。展开更多
Glycosides of Cistanche（GC）is a preparation used extensively for its neuroprotective effect against neurological diseases,but its mechanisms of action remains incompletely understood.Here,we established a bilateral ...Glycosides of Cistanche（GC）is a preparation used extensively for its neuroprotective effect against neurological diseases,but its mechanisms of action remains incompletely understood.Here,we established a bilateral common carotid artery occlusion model of vascular dementia in rats and injected the model rats with a suspension of GC（10 mg/kg/day,intraperitoneally）for 14 consecutive days.Immunohistochemistry showed that GC significantly reduced p-tau and amyloid beta（Aβ）immunoreactivity in the hippocampus of the model rats.Proteomic analysis demonstrated upregulation of mitochondrial precursor protein and downregulation of keratin type II cytoskeletal6A after GC treatment compared with model rats that had received saline.Western blot assay confirmed these findings.Our results suggest that the neuroprotective effect of GC in vascular dementia occurs via the promotion of neuronal cytoskeleton regeneration.展开更多
文摘目的:通过生物信息学分析以及细胞生物学实验研究角蛋白6A(KRT6A)对胰腺导管腺癌(PDAC)诊断、预后判断、免疫微环境以及PDAC细胞PANC1增殖、凋亡等生物学行为的影响。方法:通过GEPIA平台整合TCGA(The Cancer Genome Atlas)数据库与GTEx(Genotype-Tissue)数据库中的数据,分析KTRT6A在PDAC组织中的表达情况,并通过CIBERSORT工具分析KRT6A表达与PDAC组织中免疫细胞浸润的关系,然后通过GSEA方法研究与KRT6A基因表达相关的肿瘤信号通路。选取长海医院病理科保存的60例PDAC组织与癌旁组织标本进行免疫组化分析,验证KRT6A在肿瘤组织中表达情况;通过干扰RNA敲减PANC1细胞中KRT6A的表达,采用CCK-8实验以及流式细胞术检测敲减KRT6A对细胞的增殖、凋亡的影响。结果:利用TCGA与GTEx数据库数据分析发现,KRT6A在人PDAC组织中呈高表达,且与患者较差的生存期存在关联(P=0.015)。利用CIBERSORT软件以及GSEA分析发现,KRT6A高表达的PDAC组织中M2型巨噬细胞浸润性升高(P=0.034),且与Wnt通路(NES:1.7359272,P<0.05)、磷酸戊糖途径(PPP)(NES:1.5613053,P<0.05)等信号通路上调有关联(P<0.05或P<0.01);免疫组化结果进一步验证了KRT6A在PDAC组织中呈高表达(P<0.001)。增殖和凋亡实验发现,干扰KRT6A能够显著抑制PANC1细胞的增殖(P<0.05)以及凋亡(P<0.001)。结论:KRT6A在人PDAC组织中呈高表达,敲减其表达能够抑制PANC1细胞的增殖和凋亡,具有作为PDAC诊断与预后判断新靶标的潜力。
基金supported by the National Natural Science Foundation of China,No.30960520the Natural Science Foundation of Inner Mongolia Autonomous Region of China,No.2016MS0837
文摘Glycosides of Cistanche（GC）is a preparation used extensively for its neuroprotective effect against neurological diseases,but its mechanisms of action remains incompletely understood.Here,we established a bilateral common carotid artery occlusion model of vascular dementia in rats and injected the model rats with a suspension of GC（10 mg/kg/day,intraperitoneally）for 14 consecutive days.Immunohistochemistry showed that GC significantly reduced p-tau and amyloid beta（Aβ）immunoreactivity in the hippocampus of the model rats.Proteomic analysis demonstrated upregulation of mitochondrial precursor protein and downregulation of keratin type II cytoskeletal6A after GC treatment compared with model rats that had received saline.Western blot assay confirmed these findings.Our results suggest that the neuroprotective effect of GC in vascular dementia occurs via the promotion of neuronal cytoskeleton regeneration.
