RHA™ anti-Benzothiazinone monoclonal antibody, clone TCMTB

The present study reports on the performance of organic nitrogenous compound namely, benzotriazole (BTZ) in polyethylene oxide (PEO)-poly(methylmethacrylate) matrix in conjunction with potassium iodide and iodine as a blended polymer electrolyte and its application in TiO2 nanocrystalline solar cells. On comparison of electrical conductivity between five different compositions of benzotriazole, polymer matrix with 0.005 M of benzotriazole exhibited the best ionic conductivity with 1x10(-5) Scm(-1). The photochemical properties of the best conducting sample showed an open circuit voltage (V-oc) of 7.4 V, short circuit current density (J(sc)) of 6.74 mA, fill factor of 0.73 and efficiency () of 3.6%. The structural modifications in these doped polymer electrolyte were analysed using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The complex impedance and dielectric analyses were carried out to completely understand the relevent ion conduction mechanism.

Bortezomib (BTZ), a well-established proteasome inhibitor used in the clinical therapy, leads the modulation of several biological alterations and in turn induces apoptosis. Although clinical trials with BTZ have shown promising results for some types of cancers, but not for some others, including those of the breast. The molecular basis of BTZ resistance in breast cancer remains elusive. In the present study, we found that cellular O-GlcNAc modification was dramatically elevated by BTZ treatment in intrinsic resistant MCF-7 and T47D cells, but not in sensitive MDA-MB-231 cells. A progressive increase in O-GlcNAcylation characterized the increased acquired resistance of MDA-MB-231-derived cells. We showed that elevated O-GlcNAc subsequently modified breast cancer related pioneer factor FOXA1 and reduced its protein stability. Further, we demonstrated that FOXA1 attenuation was involved in transcriptional downregulation of proapoptotic Bim and thus suppressed breast cancer cell apoptosis. Finally, the combination of O-GlcNAc inhibitor L01 to BTZ sensitized resistant cells. Our results have revealed a new regulatory mechanism that involves O-GlcNAc elevation mediated Bim deficiency, which plays a key role in the apoptotic dysregulation and BTZ resistance in breast cancer cells.