简介:摘要目的构建DNAJA1(DnaJheatshockproteinfamily(Hsp40)memberA1)基因过表达质粒,转染结肠癌细胞株,并对其是否转染成功进行鉴定。方法Real-time聚合酶链反应(PCR)及Westernblot检测6株结肠癌细胞及瞬时转染DNAJA1质粒的细胞中DNAJA1mRNA水平。采用全基因合成法合成DNAJA1编码区序列并克隆入pEGFP-C1载体末端,构建重组质粒pEGFP-C-DNAJA1并进行测序及凝胶电泳鉴定。结果6株结直肠癌细胞中,DNAJA1在HT29和HCT116中的mRNA和蛋白水平最较低,在LOVO和SW620细胞中较高。测序及凝胶电泳结果表明DNAJA1重组质粒构建成功。瞬时转染HT29和HCT116细胞后,与对照组相比,DNAJA1mRNA分别升高约50倍,蛋白表达也明显升高。结论成功构建DNAJA1基因过表达重组质粒,并有较高的转染水平,为进一步的研究提供了条件。
简介:AbstractBackground:Hyperthermia in combination with DnaJA4-knockout (KO) obviously affects the anti-viral immunity of HaCaT cells. The mechanisms of this process are not yet fully explored. However, it is known that DnaJA4 interacts with actin cytoskeleton after hyperthermia. Our aim was to investigate the effects of DnaJA4 on F-actin in HaCaT cells following hyperthermia.Methods:Wild-type (WT) and DnaJA4-KO HaCaT cells were isolated at either 37°C (unheated) or 44°C (hyperthermia) for 30 min followed by testing under conditions of 37°C and assessing at 6, 12, and 24 h after hyperthermia. The cytoskeleton was observed with immunofluorescence. Flow cytometry and Western blotting were used to detect the expression of F-actin and relevant pathway protein.Results:DnaJA4-KO and hyperthermia changed the cytoskeleton morphology of HaCaT cells. F-actin expression levels were elevated in DnaJA4-KO cells compared with WT cells (6364.33 ± 989.10 vs. 4272.67 ± 918.50, P < 0.05). In response to hyperthermia, F-actin expression levels of both WT and DnaJA4-KO cells showed a tendency to decrease followed by an obvious recovery after hyperthermia (WT cells: unheated vs. 6 h after hyperthermia or 24 h after hyperthermia: 0.34 ± 0.02 vs. 0.24 ± 0.01, 0.31 ± 0.01, P < 0.001, P < 0.05; DnaJA4-KO cells: unheated vs. 6 h after hyperthermia or 24 h after hyperthermia: 0.44 ± 0.01 vs. 0.30 ± 0.01, 0.51 ± 0.02, P < 0.001, P < 0.01). WT cells restored to baseline levels observed in the unheated condition, while DnaJA4-KO cells exceeded baseline levels in the recovery. As the upstream factors of F-actin, a similar profile in rho-associated serine/threonine kinase 1 (ROCK 1) and RhoA expressions was observed after hyperthermia. While E-cadherin expression was decreased in response to hyperthermia, it was increased in DnaJA4-KO cells compared with WT cells.Conclusions:Hyperthermia affects the expression levels of F-actin in HaCaT cells. DnaJA4 knockout increases the expression of F-actin in HaCaT cells after hyperthermia. DnaJA4 regulates the expressions of F-actin and the related pathway proteins in response to hyperthermia in HaCaT cells.
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