We reported previously that glucose metabolism stimulates GLP-1 secretion from GLUTag cells by KATP channel closure, causing cell membrane depolarization (13), consistent with high expression levels of KATP channel subunits Kir6.2 and SUR1 in both GLUTag cells and primary murine L cells (19).
As ROS can be generated around TiO2 or N-TiO2, the nanoparticles near the cell membranes may directly cause cell membrane damage by biochemical reactions.
Oxidative stress induced by reactive oxygen species (ROS) can cause cell membrane disintegration, protein, lipid, and deoxyribose nucleic acid (DNA) damage which can further initiate or propagate the development of many chronic and degenerative diseases [ 1– 3].
The ice crystals cause cell death by disrupting cell membranes, causing cell lysis and disrupting the microvasculature leading to cellular ischaemia.
In addition, CPP-siRNA conjugates may exhibit cytotoxicity caused by cell membrane perturbation or immunogenicity [ 96].
In addition, the study by Sayes and colleagues [ 9] reported cytotoxicity (cell apoptosis) in three human cell cultures including astrocytes caused by cell membrane lipid peroxidation due to exposure to nano-C60 (a water-soluble fullerene species).
In support of these findings, the corresponding LDH activities measured in parallel were unchanged, suggesting that the decrease in the WST-1 levels was not caused by cell membrane damage, but reflects genuine growth inhibition.
The relative importance of various activity correlates is not known, and in fact many factors may serve as "messengers", such as: (1) free intracellular Ca2+ caused by cell membrane influx or release from the sarcoplasmatic reticulum; (2) metabolites (lipids, ADP, etc).; (3) hypoxia; and (4) tension (mechanosensation).
The theory behind the combined technique is that embolization should enhance the effect of chemotherapy by causing metabolically active cell membrane pumps to fail, thereby overcoming drug resistance.
From our results two aspects can be elucidated, one is the fact that AgNPs themselves having antibacterial properties act on the pathogenic bacteria by anchoring to the cell surface trying to get inside the bacterial cell through ruptured cell membrane leading to the perforation of cell membrane by causing leakage of cell components and finally cell death.
