Abstract
SILAC (Stable Isotope Labeling with Amino acids in Cell culture) is one of the most popular methods in quantitative proteomics field. The internal standards of SILAC can mark a variety of clinical samples or tissues instead of labeling the whole organism and play an important role in proteomics. Preparing the SILAC internal standards has been difficult and time-consuming for culturing cell lines, therefore a simple and convenient Re-SILAC method was introduced. Cell lines labeled with SILAC were thawed in SILAC medium to be remarked again. Comparing the morphology, size, growth curve and proteome of MHCC97-L between Re-SILAC and SILAC cell lines, it was found that SILAC-labeled cells that were frozen with liquid nitrogen had no influence on Re- SILAC-labeled. In conclusion, Re-SILAC method is a useful method for preparing SILAC internal standards.
Keywords: CCK-8, liquid storage, MHCC97-L, quantitative proteomics, Re-SILAC, SILAC.
Graphical Abstract