Project description:SH-SY5Y cells were transfected with either BioID-GFP-NLS control or BioID-Flag-ERRg expressing adenoviruses and isolated with Trizol after 48 hours to compare gene expression and find potential ERRg targets specific to neuron-like cells.
Project description:High ploidy large cytoplasmic megakaryocytes (LCM) are critical negative regulators of hematopoietic stem cells (HSC) and are responsible for platelet formation. Using a mouse knockout model with normal megakaryocyte numbers but essentially devoid of LCM (MK-LCM KO), we demonstrated a pronounced increase in bone marrow HSC concurrent with endogenous mobilization and extramedullary hematopoiesis. When HSC isolated from a MK-LCM KO microenvironment were transplanted in lethally irradiated mice, the absence of LCM increased HSC in BM, blood and spleen. Severe thrombocytopenia was observed in animals with diminished LCM, although there was no change in megakaryocyte ploidy distribution. In contrast, WT HSC-generated LCM regulated a normal HSC pool and prevented thrombocytopenia. The present label-free quantitative LC-MSMS data was used to determine proteins that are differentially expressed in bone marrow cells of MK-LCM WT versus MK-LCM KO mice.
Project description:Quantitative label free proteomics on an n=1 experiment of isolated tritosomes (lysosomes) from mus musculus, WT and a knock out of the LIMP2 protein.
Project description:There is a critical unmet need to image 2D materials within single cells and tissues. Here we propose a versatile label-free single-cell detection strategy based on mass cytometry. We use single-cell mass cytometry by time-of-flight (CyTOF), imaging mass cytometry, and multiplexed ion beam imaging by time-of-flight (MIBI-TOF) with three representative MXenes. Nb4C3, Mo2Ti2C3, and Ta4C3 were selected to ensure mass-detection within the range and to avoid overlap with currently available tags. We demonstrated their biocompatibility, detection, and quantification in 16 primary human immune cell subpopulations also showing the impact of MXene lateral size on the detection signal and cell binding. We report the biological and immune functional compatibility of MXenes. In vivo biodistribution experiments in mice using a mixture of MXenes revealed their presence in liver, blood, spleen, and lungs. Lastly, we applied MIBI-TOF to capture the presence of MXenes in different organs. The label-free detection of 2D materials by mass cytometry at the single cell level, on multiple subpopulations and in multiple organs in vivo opens exciting new opportunities in biomedicine.