Characterization of endogenous metabolites and xenobiotics is essential to deconvoluting the genetic and environmental causes of disease. However, surveillance of chemical exposure and disease-related changes in large cohorts requires an analytical platform that offers rapid measurement, high sensit...
Large numbers of cells are generally required for quantitative global proteome profiling due to the significant surface adsorption losses associated with sample processing. Such bulk measurement obscures important cell-to-cell variability (cell heterogeneity) and makes proteomic profiling impossible...
Mass spectrometry (MS)-based proteomics has great potential for overcoming the limitations of antibody-based immunoassays for antibody-independent, comprehensive, and quantitative proteomic analysis of single cells. Indeed, recent advances in nanoscale sample preparation have enabled effective proce...
Mass spectrometry (MS)-based proteomics has great potential for overcoming the limitations of antibody-based immunoassays for antibody-independent, comprehensive, and quantitative proteomic analysis of single cells. Indeed, recent advances in nanoscale sample preparation have enabled effective proce...
Effective nanoscale phosphoproteome analysis remains a daunting task, primarily due to significant sample loss associated with non-specific surface adsorption during phosphopeptide enrichment and other sample processing steps. To address this issue, we have developed a tandem tip-based C18-IMAC-C18 ...
Neutrophils play critical roles in modulating the immune response. However, neutrophils have a short circulating half life, are readily stimulated in vitro, and have low levels of cellular mRNA when compared to other blood leukocyte populations. All of these factors have made it difficult to evaluat...
We developed a hanging drop (HD) method to improve the sample recovery for spatial proteomics by placing the nanowell chip in an upside-down direction during droplet-based sample preparation. Compared with the commonly-used sitting-drop (SD) method, the HD method can keep the tissue voxel away from ...