Tumor metastasis is the main reason of cancer-related death for gastric cancer (GC) patients and gene expression microarray data indicate that kinesin family member 26B (KIF26B) is one of the most upregulated genes in metastatic GC samples. Specifically, KIF26B expression was upregulated in a stepwise manner from non-tumorous gastric mucosa, primary GC tissues without metastasis, via primary GC tissues with metastasis, to secondary lymph node metastatic (LNM) foci. Increased expression of KIF26B was correlated with tumor size, positive LNM or distant metastases and poor prognosis. KIF26B, negatively regulated by miR-372, promoted GC cell proliferation and metastasis in vitro and in vivo. Mechanistic investigations confirmed that the main target of KIF26B was the vascular endothelial growth factor (VEGF) signaling pathway, particularly by inhibition or overexpression of VEGFA, PXN, FAK, PIK3CA, BCL2 and CREB1. Thus, KIF26B, a novel oncogene regulated by miR-372, promotes proliferation and metastasis through the VEGF pathway in GC.
Signal transducers and activators of transcription (STAT) are important in the development of laryngeal carcinomas and are potential novel molecular targets for therapy to improve survival of patients with this cancer. This study was designed to investigate the influence of the janus activated kinase (JAK)/STAT inhibitor AG490 on proliferation and apoptosis of Hep-2 human laryngeal cancer cells and whether there was any inhibition by AG490 of the JAK/STAT3 signalling pathway. AG490 inhibited cell proliferation in dose- and time-dependent manners and induced apoptosis in Hep-2 cells, with the number of apoptotic cells increasing with time. AG490 inhibited G1 to S cell cycle transition and induced G1 cell cycle arrest as well as significantly down-regulating STAT3, phosphorylated STAT3 and survivin in Hep-2 cells. This study showed that AG490 significantly inhibited proliferation and induced apoptosis of laryngeal carcinoma cells through down-regulation of STAT3 and survivin, suggesting a potential target for laryngeal carcinoma treatment.
Monoclinic m-LaVO 4 , having a monazite-type structure and being known as a host crystal for Nd 3+ -lasants, is an attractive χ (3) -nonlinear optical material for Raman laser converters. This paper presents the stimulated Raman scattering (SRS) spectroscopy of m-LaVO 4 in the visible and near-IR spectral range using picosecond laser excitation. High-order SRS and Raman-induced four-wave parametric mixing processes result in an almost two-octave-wide Stokes and anti-Stokes frequency comb. All the measured spectral lines were assigned to the participating molecular vibration modes of the studied vanadate. Finally, an estimation of the steady-state Raman gain coefficient for first Stokes generation in near-IR was performed.
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