Improving the Purity of Extracellular Vesicles by Removal of Lipoproteins from Size Exclusion Chromatography- and Ultracentrifugation-Processed Samples Using Glycosaminoglycan-Functionalized Magnetic Beads.

Extracellular vesicles (EVs) are present in blood at much lower concentrations (5-6 orders of magnitude) compared to lipoprotein particles (LP). Because LP and EV overlap in size and density, isolating high-purity EVs is a significant challenge. While the current two-step sequential EV isolation process using size-expression chromatography (SEC) followed by a density gradient (DG) achieves high purity, the time-consuming ultracentrifugation (UC) step in DG hinders workflow efficiency.

Characterization of markers, functional properties, and microbiome composition in human gut-derived bacterial extracellular vesicles.

Past studies have confirmed the etiologies of bacterial extracellular vesicles (BEVs) in various diseases, including inflammatory bowel disease (IBD) and colorectal cancer (CRC). This study aimed to investigate the characteristics of stool-derived bacterial extracellular vesicles (stBEVs) and discuss their association with stool bacteria. First, three culture models - gram-positive (G+)BEVs (from ), gram-negative (G-)BEVs (from ), and eukaryotic cell-derived EVs (EEV, from Colo205 cell line) - were used to benchmark various fractions of stEVs separated from optimized density gradient approach (DG).

A Systemic Approach to Isolate, Retrieve, and Characterize Trophoblasts from the Maternal Circulation Using a Centrifugal Microfluidic Disc and a Multiple Single-Cell Retrieval Strategy.

Rare cells in the blood often have rich clinical significance. Although their isolation is highly desirable, this goal remains elusive due to their rarity. This paper presents a systemic approach to isolate and characterize trophoblasts from the maternal circulation.

Exosomes-Potential for Blood-Based Marker in Alzheimer's Disease.

Exosomes are believed to be secreted from multivesicular endosomes and containing proteins and nucleic acids, including mRNA and microRNAs, which have been implicated to play a role in neurodegenerative diseases. Neuron-derived exosomes at the circulation provide a unique potential as biomarkers towards assessment of Alzheimer's disease (AD), even at the pre-clinical stage. This review briefly discusses their biogenesis and transport, exosomal protein verses soluble protein, evidence for their role in AD, isolation of exosomes, and challenges and future directions to realize reliable blood-based biomarkers to meet phenomenal unmet clinical and pre-clinical need of AD.

Author Correction: Immunofluorescence can assess the efficacy of mTOR pathway therapeutic agent Everolimus in breast cancer models.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Immunofluorescence can assess the efficacy of mTOR pathway therapeutic agent Everolimus in breast cancer models.

When breast cancer patients start to exhibit resistance to hormonal therapy or chemotherapy, the mTOR inhibitor everolimus can be considered as an alternative therapeutic agent. Everolimus can deregulate the PI3K/AKT/mTOR pathway and affect a range of cellular functions. In some patients, the agent does not exhibit the desired efficacy and, even worse, not without the associated side effects.