How can I increase the transduction efficiency with the BacMam 2.0 reagents such as the the CellLight and Premo products?
Try varying particle-to-cell ratio (PPC), incubation volume, temperature and, cell density (if adherent cells are transduced). For adherent cells, we recommend a confluence of about 70%. Following the PPC, adjusting the volume is the next best parameter to change to optimize protein expression. If that doesn't work, you can also use the BacMam Enhancer Kit (Cat. No. B10107).
Cell entry and trafficking of human adenovirus bound to blood factor X is determined by the fiber serotype and not hexon:heparan sulfate interaction.
Authors:Corjon S, Gonzalez G, Henning P, Grichine A, Lindholm L, Boulanger P, Fender P, Hong SS,
Journal:PLoS One
PubMed ID:21637339
'Human adenovirus serotype 5 (HAdV5)-based vectors administered intravenously accumulate in the liver as the result of their direct binding to blood coagulation factor X (FX) and subsequent interaction of the FX-HAdV5 complex with heparan sulfate proteoglycan (HSPG) at the surface of liver cells. Intriguingly, the serotype 35 fiber-pseudotyped vector HAdV5F35 ... More
Particles on the move: intracellular trafficking and asymmetric mitotic partitioning of nanoporous polymer particles.
Authors:Yan Y, Lai ZW, Goode RJ, Cui J, Bacic T, Kamphuis MM, Nice EC, Caruso F,
Journal:
PubMed ID:23713907
'Nanoporous polymer particles (NPPs) prepared by mesoporous silica templating show promise as a new class of versatile drug/gene delivery vehicles owning to their high payload capacity, functionality, and responsiveness. Understanding the cellular dynamics of such particles, including uptake, intracellular trafficking, and distribution, is an important requirement for their development as ... More
GX15-070 (obatoclax) induces apoptosis and inhibits cathepsin D- and L-mediated autophagosomal lysis in antiestrogen-resistant breast cancer cells.
Authors:Schwartz-Roberts JL, Shajahan AN, Cook KL, Wärri A, Abu-Asab M, Clarke R,
Journal:Mol Cancer Ther
PubMed ID:23395885
'In estrogen receptor-positive (ER+) breast cancer cells, BCL2 overexpression contributes to antiestrogen resistance. Direct targeting of the antiapoptotic BCL2 members with GX15-070 (obatoclax), a BH3-mimetic currently in clinical development, is an attractive strategy to overcome antiestrogen resistance in some breast cancers. Recently, GX15-070 has been shown to induce both apoptosis ... More
Polycations such as polyethylenimine (PEI) are used in many novel nonviral vector designs and there are continuous efforts to increase our mechanistic understanding of their interactions with cells. Even so, the mechanism of polyplex escape from the endosomal/lysosomal pathway after internalization is still elusive. The ... More
Inhibitors of intravesicular acidification protect against Shiga toxin in a pH-independent manner.
Authors:Dyve Lingelem AB, Bergan J, Sandvig K,
Journal:Traffic
PubMed ID:22132807
Shiga toxin inhibits protein synthesis after being transported from the cell surface to endosomes and retrogradely through the Golgi apparatus to the endoplasmic reticulum (ER) and into the cytosol. In this study, we have abolished proton gradients across internal membranes in different ways and investigated the effect on the various ... More