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Metastasis is still a major cause of cancer-related mortality. Lysosome-associated membrane protein 3 (LAMP3) has been implicated in the invasiveness and metastasis of multiple cancer types; however, the underlying mechanisms are unclear. In this study, we found that LAMP3 was overexpressed in esophageal squamous cell carcinoma (ESCC) tissues and that this increased expression positively correlated with lymph node metastasis. Depletion of LAMP3 dramatically suppressed the motility of ESCC cells in vitro and experimental pulmonary and lymph node metastasis in vivo. Importantly, knockdown of LAMP3 increased the level of phosphorylated VASP(Ser239), which attenuated the invasive and metastatic capability of ESCC cells. We identified that cAMP-dependent protein kinase A (PKA) was responsible for the phosphorylation of VASP at Ser239. Consistently, silencing of PKA regulatory subunits diminished Ser239 phosphorylation on VASP and restored the motility capacity of LAMP3-depleted ESCC cells. In conclusion, we uncovered a previously unknown role of LAMP3 in promoting cellular motility and metastasis in ESCC. We performed karyotyping of Amoeba sp. strain Cont. Based on the results of a cytological analysis, we concluded that the chromosome number of Amoeba sp. strain Cont in mitosis was unstable. In all cases they appeared to be hypergaploid (the basic chromosome number is 30), with monosomy of all chromosomes except four shortest ones. The presence of "extrachromosomes" in the nucleus could prolong until the beginning of the anaphase. It was only then that they were ejected from the nucleus and the euploidy (haploidy) was restored. The stage of endoprophase nucleus was revealed in the cell cycle of Amoeba sp. strain Cont. https://www.selleckchem.com/products/at13387.html This stage has not yet been found in other amoebae from the "proteus-type" group that had been previously studied (A. proteus strain B and A. borokensis). The maximum number of endoreplication rounds in the strain Cont amoebae nuclear cycle was 4 or 5. The regular extrusion of chromosomes from the nucleus into the cytoplasm occurred in each of the endoreplication rounds. Comparative cytological analysis of A. proteus strain B, A. borokensis and Amoeba sp. strain Cont karyotypes indicated that strain Cont, though rather close to the former two amoebae, is actually a distinct species. Cadmium (Cd) is a pervasive harmful metal in the environment. It is a well-known inducer of tumorigenesis, but its mechanism is still unclear. We have previously reported that Cd-induced autophagy was apoptosis-dependent and prevents apoptotic cell death to ensure the growth of A549 cells. In this study, the mechanism was further investigated. Cd treatment increased glucose uptake and lactate release significantly. Meanwhile, the protein level of GLUT1,HKII,PKM2 and LDHA increased in a time-dependent manner, indicating that Cd induced aerobic glycolysis in A549 and HELF cells. The inhibitors of autophagy, 3MA, and CQ, repressed Cd-induced glycolysis-related proteins, indicating that autophagy was involved in Cd-induced glycolysis in A549 and HELF cells. Knockdown of ATG4B or ATG5 by siATG4B and siATG5 decreased Cd-induced glycolysis, while overexpression of ATG4B enhanced glycolysis. These results demonstrated that Cd-induced glycolysis was autophagy-dependent. Then, glycolysis inhibitor, 2DG and siPKM2 could inhibit Cd-induced cell viability and cell cycle progression compared to only Cd treatment, indicating that glycolysis played an important role in Cd-induced cell growth. Finally, co-treatment of transfection of ATG4B-DNA plasmids with 2DG or siPKM2 further demonstrated that the autophagy-glycolysis axis played an important role in Cd-induced cell cycle progression. Taken together, our results suggested that Cd-induced glycolysis is autophagy-dependent and the autophagy-glycolysis axis underlies the mechanism of Cd-induced cell growth in A549 and HELF cells. To evaluate the immunotoxic effects of xenobiotics, we have established the Multi-ImmunoTox assay, in which three stable reporter cell lines are used to evaluate the effects of chemicals on the IL-2, IFN-γ, IL-1β and IL-8 promoters. Here, we report the official validation study of the IL-2 luciferase assay (IL-2 Luc assay). In the Phase I study that evaluated five coded chemicals in three sets of experiments, the average within-laboratory reproducibility was 86.7%. In the Phase II study, 20 coded chemicals were evaluated at multiple laboratories. In the combined results of the Phase I and II studies, the between-laboratory reproducibility was 80.0%. These results suggested that the IL-2 Luc assay was reproducible both between and within laboratories. To determine the predictivity, we collected immunotoxicological information and constructed the reference data by classifying the chemical into immunotoxic compounds targeting T cells or others according to previously reported criteria. When compared with the reference data, the average predictivity of the Phase I and II studies was 75.0%, while that of additional 60 chemicals examined by the lead laboratory was 82.5%. Although the IL-2 Luc assay alone is not sufficient to predict immunotoxicity, it will be a useful tool when combined with other immune tests. This study aims to propose different ex vivo methodologies for pesticide evaluation when in contact with ocular mucosa. The first ex vivo study was performed using vertical Franz cells with fresh and refrigerated excised bovine corneas. The second evaluated the permeation through the cornea by using fresh, refrigerated and damaged whole bovine eyes. Both experiments were evaluated by applying 50 μl (of 5 mg/ml solution) of an emulsifiable pesticide formulation (Dimetoato 500 EC®). In the first study, dimethoate profiles and permeation fluxes showed no statistical differences (p less then .05) between fresh and refrigerated excised corneas, probably due to the excision procedure generating damage to the cornea by altering stromal structure, irrespective of the refrigeration procedure. In relation to the results obtained for developed ex vivo permeation method in whole eyes, there was a statistical difference (p less then .05) between experiments performed with fresh eyes and those performed with refrigerated/damaged eyes.
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