Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (14): 2228-2234.doi: 10.3969/j.issn.2095-4344.1661
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Luo Xuguang1, Zang Haojing1, Sun Peng1, Cao Ximei2
Received:
2019-01-10
Online:
2019-05-18
Published:
2021-04-28
Contact:
Cao Ximei, Associate professor, Master’s supervisor, Department of Histology and Embryology, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
About author:
Luo Xuguang, Master, Experimentalist, Department of Microbiology and Immunology, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
Supported by:
the Natural Science Foundation of for the Youth of Shanxi Province, No. 2014021028-1 (to CXM); the Science and Technology Innovation Foundation of Shanxi Medical University, No. 01201401 (to CXM); the 331 Early Career Researcher Grant of Basic Medical School of Shanxi Medical University, No. 201413 (to CXM)
CLC Number:
Luo Xuguang, Zang Haojing, Sun Peng, Cao Ximei. Choosing appropriate lysis buffers for protein extraction from acidotic mouse skeletal muscles[J]. Chinese Journal of Tissue Engineering Research, 2019, 23(14): 2228-2234.
2.2 三种裂解液提取蛋白产量结果评价 按实验设计分组,3种裂解液匀浆处理骨骼肌组织,蛋白产量有显著差异,见表4。骨骼肌组织在JP Buffer中溶解完全,裂解液非常黏稠,离心后无明显沉淀;在Original Buffer和RIPA Buffer中溶解均不完全,离心后肉眼可见沉淀。3种裂解液提取的总蛋白平均浓度见表4,依次为5.703 g/L、8.428 g/L、 2.836 g/L;3种裂解液中JP Buffer提取蛋白平均产量最高、RIPA Buffer最低。虽然JP Buffer提取蛋白浓度最高,但是考马斯亮蓝染色结果显示蛋白条带的数量和强度并不是最强,RIPA Buffer和Original Buffer的差异不明显,见图1。提示裂解提取的骨骼肌组织蛋白平均浓度高并一定目的蛋白产量高。"
2.3 蛋白免疫印迹实验筛选最佳裂解液 见图2,3。结果显示对照组和酸中毒组Original Buffer提取蛋白的目的蛋白AKT条带最清晰,见图2A、B,蛋白灰度测定值最高,见图3A、B;虽然JP Buffer蛋白平均产量最高,但是目的蛋白条带信号弱,见图2A、B;RIPA Buffer裂解能力温和蛋白平均产量偏低,目的蛋白条带信号较弱,见图2A、B;SigmaPlot分析结果见图3。相同蛋白样本抗S6 Ribosomal Protein单克隆抗体再次评价,见图2C、D,实验结果显示Original Buffer要优于其他2种裂解液,见图2C、D,图3C、D,提示Original Buffer能保证骨骼肌组织目的蛋白的提取质量。 同时根据表2的评分标准,分别对3种裂解液的组成和相应蛋白免疫印迹实验结果评分,结果见表5,Original Buffer总分高于其他2种裂解液,同样提示Original Buffer是适合酸中毒小鼠骨骼肌组织蛋白提取的裂解液。"
2.4 分析AKT信号通路状态 通过考马斯亮蓝染色、蛋白免疫印迹实验、评分表记分等方法筛选出Original Buffer提取酸中毒小鼠骨骼肌组织蛋白,分析AKT信号通路在酸中毒组的变化。已知AKT信号通路通过磷酸化而活化,参与调节细胞的分化、增殖和凋亡;总AKT相等的情况下磷酸化p-AKT的差异可以反应该信号通路是否活化。AKT有Thr308和Ser473两个磷酸化位点,AKT活化后通过激活或抑制作用调节下游靶蛋白的活性。为了保证实验数据的准确性,对照组和酸中毒组均设重复样本,见图4,结果显示对照组和酸中毒组AKT和p-AKT条带清晰,灰度测定值基本相等,统计分析两组之间P=0.905 > 0.05,提示酸中毒组较对照组AKT磷酸化程度没有变化,AKT信号通路未被"
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