INCUBATION OF DENATURATED SAMPLES INCREASED REPRODUCIBILITY AND QUALITY OF PROTEOMIC PROFILE OF SELDI-TOF MS

Protein profiling with high-throughput proteomic technology, SELDI-TOF, is a new potential tool for diagnosis of human diseases. This advanced technique has increasingly been used for the detection of disease biomarker. However, analytical reproducibility is a significant challenge in SELDI-TOF profiling in order to have confidence in the results. Here, we showed a simple step to improve its analytical performance. IMAC 30-Cu Protein Chip was used to incubate denaturated samples to increase the number of peak detection and decrease peak intensity coefficient of variation. Incubation of denaturated samples overnight at 4°C increased significantly reproducibility and quality of proteomic profile of SELDI-TOF MS for IMAC30-Cu ProteinChip. This strategy could be applied to address reproducibility issue in protemictechnology in protein profiling.