Dielectrophoretically-assisted electroporation using light-activated virtual microelectrodes for multiple DNA transfection.

Gene transfection is an important technology for various biological applications. The exogenous DNA is commonly delivered into cells by using a strong electrical field to form transient pores in cellular membranes. However, the high voltage required in this electroporation process may cause cell damage.

Peroxide responsive regulator PerR of group A Streptococcus is required for the expression of phage-associated DNase Sda1 under oxidative stress.

The peroxide regulator (PerR) is a ferric uptake repressor-like protein, which is involved in adaptation to oxidative stress and iron homeostasis in group A streptococcus. A perR mutant is attenuated in surviving in human blood, colonization of the pharynx, and resistance to phagocytic clearance, indicating that the PerR regulon affects both host environment adaptation and immune escape. Sda1 is a phage-associated DNase which promotes M1T1 group A streptococcus escaping from phagocytic cells by degrading DNA-based neutrophil extracellular traps.

An integrated microfluidic platform for rapid tumor cell isolation, counting and molecular diagnosis.

Ovarian cancer is the second most common of the gynecological cancers in Taiwan. It is challenging to diagnose at an early stage when proper treatment is the most effective. It is well recognized that the detection of tumor cells (TCs) is critical for determining cancer growth stages and may provide important information for accurate diagnosis and even prognosis.

Differential secretomics of Streptococcus pyogenes reveals a novel peroxide regulator (PerR)-regulated extracellular virulence factor mitogen factor 3 (MF3).

Streptococcus pyogenes is a human pathogen that causes various diseases. Numerous virulence factors secreted by S. pyogenes are involved in pathogenesis.