Cells, which were cultured without animal-derived agents and also treated with a proteolytic enzyme to transiently modify cell surface adhesion proteins, were infused 24 h after transient middle cerebral artery occlusion (MCAO).
In addition, lactic acid has a stronger bacteria inhibitory activity compared to the commonly used hydrochloric acid at the same pH value due to its higher acid dissociation constant, ability to modify cell surface properties and to induce cell membrane damage (Wang et al. 2014).
Cells treated with a proteolytic enzyme (pronase) could transiently modify cell surface adhesion proteins [ 168].
Instead, they may function to modify cell surface structures during infection.
Together with H. pylori-activated matrix-metalloproteases (MMPs) of the host cell [ 104, 106], several modes of shedding and modifying cell surface molecules are now known.
In addition to these two groups, they also analyzed the distribution of BM-MSCs treated with a proteolytic enzyme named Pronase (Roche, Mannheim, Germany), instead of trypsin, to transiently modify cell surface proteins.
The linker consists of a non-toxic low molecular-weight polyethyleneimine (PEI) backbone conjugated with multiple hydrazide groups that can aggregate cells within 30 min by reacting with the aldehyde handles on the chemically modified cell-surface glycoproteins.
In addition, click chemistry approaches have been applied to fluorescently label oligonucleotides, to image modified cell-surface glycans, and to target nanoparticles to cancer cells.
The biotin tracer assay was carried out using the modified cell-surface biotinylation method described by Umeda et al. (Umeda et al., 2006).
