PKB/Akt, Protein kinase B

  • 文章类型: Journal Article
    麻竹的潜在药用价值,中国最受欢迎和经济上最重要的竹种之一,被低估了。在本研究中,我们发现天花叶提取物(DLE)降低空腹血糖水平,体重,低密度脂蛋白胆固醇对db/db小鼠具有低肝毒性。此外,进行基因表达谱分析和途径富集分析表明DLE影响代谢途径。重要的是,DLE通过下调葡萄糖-6-磷酸酶(G6PC)和磷酸烯醇丙酮酸羧激酶1(PCK1)表达激活AKT信号通路并减少葡萄糖产生。此外,网络药理学分析通过靶向胰岛素生长因子1受体(IGF1R)确定芦丁是DLE的活性成分,AKT的上游信号转换器。由于其降血糖作用和低毒性,DLE可以被认为是2型糖尿病患者的辅助治疗选择。
    The potential medicinal value of Ma bamboo (Dendrocalamus latiflorus), one of the most popular and economically important bamboo species in China, has been underestimated. In the present study, we found that D. latiflorus leaf extract (DLE) reduced fasting blood glucose levels, body weight, and low-density lipoprotein cholesterol with low liver toxicity in db/db mice. In addition, gene expression profiling was performed and pathway enrichment analysis showed that DLE affected metabolic pathways. Importantly, DLE activated the AKT signaling pathway and reduced glucose production by downregulating glucose-6-phosphatase (G6PC) and phosphoenolpyruvate carboxykinase 1 (PCK1) expression. Moreover, network pharmacology analysis identified rutin as an active component in DLE through targeting insulin growth factor 1 receptor (IGF1R), an upstream signaling transducer of AKT. Due to its hypoglycemic effects and low toxicity, DLE may be considered an adjuvant treatment option for type 2 diabetes patients.
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  • 文章类型: Journal Article
    新薄荷醇,一种环状单萜,是薄荷醇的立体异构体,存在于薄荷醇的精油中。它在食品中用作调味剂,在化妆品和药品,因为它的冷却效果。然而,新薄荷脑对其抗癌潜力的研究并不多。此外,靶向透明质酸酶,组织蛋白酶-D,植物化学物质和ODC是癌症预防和/或治疗的有效方法之一。
    研究新薄荷脑对人类癌症的分子和细胞靶标的抗增殖潜力(A431,PC-3,K562,A549,FaDu,MDA-MB-231,COLO-205,MCF-7和WRL-68)和正常(HEK-293)细胞系。
    使用SRB在人类癌症和正常细胞系上评估了新薄荷脑的效力,NRU和MTT测定。在无细胞和基于细胞的测试系统中进行了新薄荷醇的基于分子靶标的研究。Further,通过实时定量PCR分析和分子对接研究证实了新薄荷脑的效力.在小鼠EAC模型上进行了新薄荷脑的体内抗癌潜力,并通过计算机模拟进行了毒性检查。离体和体内方法。
    新薄荷醇通过阻止G2/M期并增加亚二倍体细胞的数量,对人表皮样癌(A431)细胞具有有希望的活性(IC5017.3±6.49μM)。它显着抑制透明质酸酶活性(IC5012.81±0.01μM)并影响微管蛋白聚合。表达分析和分子对接研究支持基于体外分子和细胞靶标的结果。新薄荷醇在75mg/kgbw时可预防EAC肿瘤形成58.84%,并抑制透明质酸酶活性高达10%,腹膜内剂量。在急性口服毒性研究中发现1000毫克/千克体重的口服剂量是安全的。
    新薄荷醇通过抑制微管蛋白聚合和透明质酸酶活性来延缓皮肤癌细胞的生长,负责肿瘤的生长,转移,和血管生成。
    Neomenthol, a cyclic monoterpenoid, is a stereoisomer of menthol present in the essential oil of Mentha spp. It is used in food as a flavoring agent, in cosmetics and medicines because of its cooling effects. However, neomenthol has not been much explored for its anticancer potential. Additionally, targeting hyaluronidase, Cathepsin-D, and ODC by phytochemicals is amongst the efficient approach for cancer prevention and/or treatment.
    To investigate the molecular and cell target-based antiproliferative potential of neomenthol on human cancer (A431, PC-3, K562, A549, FaDu, MDA-MB-231, COLO-205, MCF-7, and WRL-68) and normal (HEK-293) cell lines.
    The potency of neomenthol was evaluated on human cancer and normal cell line using SRB, NRU and MTT assays. The molecular target based study of neomenthol was carried out in cell-free and cell-based test systems. Further, the potency of neomenthol was confirmed by quantitative real-time PCR analysis and molecular docking studies. The in vivo anticancer potential of neomenthol was performed on mice EAC model and the toxicity examination was accomplished through in silico, ex vivo and in vivo approaches.
    Neomenthol exhibits a promising activity (IC50 17.3 ± 6.49 μM) against human epidermoid carcinoma (A431) cells by arresting the G2/M phase and increasing the number of sub-diploid cells. It significantly inhibits hyaluronidase activity (IC50 12.81 ± 0.01 μM) and affects the tubulin polymerization. The expression analysis and molecular docking studies support the in vitro molecular and cell target based results. Neomenthol prevents EAC tumor formation by 58.84% and inhibits hyaluronidase activity up to 10% at 75 mg/kg bw, i.p. dose. The oral dose of 1000 mg/kg bw was found safe in acute oral toxicity studies.
    Neomenthol delayed the growth of skin carcinoma cells by inhibiting the tubulin polymerization and hyaluronidase activity, which are responsible for tumor growth, metastasis, and angiogenesis.
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  • 文章类型: Journal Article
    研究丹参酮IIA对人非小细胞肺癌细胞株A549增殖的影响及其在VEGF/VEGFR信号通路上的可能机制。丹参酮IIA与其靶蛋白相互作用的探索为研究中药活性成分的抗癌机制提供了可行的平台。CCK-8测定用于评估丹参酮IIA(2.5-80μmol/L)处理24、48和72h的A549细胞的增殖活性。分别。流式细胞术用于检测细胞凋亡和细胞周期扰动。通过Western印迹研究VEGF和VEGFR2的表达。通过使用DiscoveryStudio2.1中的CDOCKER算法,用分子对接分析评估丹参酮IIA在VEGFR2蛋白的晶体结构内的结合模式。CCK-8结果显示,丹参酮IIA能够以剂量和时间依赖性方式显著抑制A549细胞增殖。流式细胞仪检测结果显示,试验组细胞凋亡率高于溶媒对照组,和丹参酮IIA处理的细胞在S期积累,高于车辆控制。此外,在Westernblot中VEGF和VEGFR2的表达降低。最后,分子对接分析表明,丹参酮IIA可以以其独特的模式稳定地对接到VEGFR2蛋白的激酶结构域中,从而与Cys917形成H键,与Val848形成π-π堆叠相互作用。总之,丹参酮IIA可能抑制A549增殖,诱导细胞凋亡和细胞周期停滞在S期。该药物可以通过靶向VEGF/VEGFR2的蛋白激酶结构域来抑制血管生成。
    The effects of tanshinone IIA on the proliferation of the human non-small cell lung cancer cell line A549 and its possible mechanism on the VEGF/VEGFR signal pathway were investigated. The exploration of the interaction between tanshinone IIA and its target proteins provides a feasible platform for studying the anticancer mechanism of active components of herbs. The CCK-8 assay was used to evaluate the proliferative activity of A549 cells treated with tanshinone IIA (2.5-80 μmol/L) for 24, 48 and 72 h, respectively. Flow cytometry was used for the detection of cell apoptosis and cell cycle perturbation. VEGF and VEGFR2 expression were studied by Western blotting. The binding mode of tanshinone IIA within the crystal structure of the VEGFR2 protein was evaluated with molecular docking analysis by use of the CDOCKER algorithm in Discovery Studio 2.1. The CCK-8 results showed that tanshinone IIA can significantly inhibit A549 cell proliferation in a dose- and time-dependent manner. Flow cytometry results showed that the apoptosis rate of tested group was higher than the vehicle control, and tanshinone IIA-treated cells accumulated at the S phase, which was higher than the vehicle control. Furthermore, the expression of VEGF and VEGFR2 was decreased in Western blot. Finally, molecular docking analysis revealed that tanshinone IIA could be stably docked into the kinase domain of VEGFR2 protein with its unique modes to form H-bonds with Cys917 and π-π stacking interactions with Val848. In conclusion, tanshinone IIA may suppress A549 proliferation, induce apoptosis and cell cycle arrest at the S phase. This drug may suppress angiogenesis by targeting the protein kinase domains of VEGF/VEGFR2.
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