Li Xuanwen, Jin Qihui, Cao Jia, Xie Chunliang, Cao Rui, Liu Zhen, Xiong Jixian, Li Jianglin, Yang Xiaoxu, Chen Ping, Liang Songping
College of Life Sciences, Hunan Normal University, Changsha, 410081, People's Republic of China.
Biochim Biophys Acta. 2009 Jan;1794(1):32-41. doi: 10.1016/j.bbapap.2008.07.009. Epub 2008 Jul 28.
The hepatocyte is a highly polarized cell with a heterogeneous distribution of plasma-membrane (PM) proteins. To reduce the complexity of the proteome of liver tissue and give a comprehensive profile of hepatocyte PM, two PM purification methods based on cell surface modification, named the biotin-avidin (BA) and cationic silica-polyanion (CSP) strategies were evaluated and compared with the traditional cell fractionation method to prepare highly enriched PM from freshly isolated C57 mouse hepatocytes. Employing different principles for PM modification, both methods were effective in the isolation of general and purified PM fraction. The CSP strategy showed better yield for the PM purification from freshly isolated hepatocytes. 189 non-redundant proteins were identified, including 49 from the BA method and 185 from CSP strategy. Many known and novel PM-associated proteins were also found. Our evaluation here should give implications for PM preparation from other freshly isolated tissue-derived cells. The hepatocyte PM proteins identified here should be taken as a references for the PM-related functional and diseases research.
肝细胞是一种高度极化的细胞,其质膜(PM)蛋白分布不均一。为了降低肝脏组织蛋白质组的复杂性并全面描绘肝细胞PM的情况,我们评估了两种基于细胞表面修饰的PM纯化方法,即生物素-抗生物素蛋白(BA)和阳离子二氧化硅-聚阴离子(CSP)策略,并将其与传统的细胞分级分离方法进行比较,以从新鲜分离的C57小鼠肝细胞中制备高度富集的PM。这两种方法采用不同的PM修饰原理,在分离一般和纯化的PM组分方面均有效。CSP策略从新鲜分离的肝细胞中纯化PM的产率更高。共鉴定出189种非冗余蛋白,其中BA方法鉴定出49种,CSP策略鉴定出185种。还发现了许多已知和新的PM相关蛋白。我们在此的评估应为从其他新鲜分离组织来源的细胞中制备PM提供启示。这里鉴定出的肝细胞PM蛋白应为PM相关功能和疾病研究提供参考。