p21 (CDKN1A) expression from an IPTG-inducible promoter in HT1080 p21-9 cells was previously shown to inhibit a set of genes, many of which are involved in cell cycle progression, and to upregulate another set of genes, some of which have been implicated in cancer and age-related diseases. We have now developed Senexin A, a small-molecule inhibitor of p21-induced transcription, which we found to be a selective inhibitor of CDK8 and CDK19. Here we tested the effect of Senexin A on the induction and inhibition of transcription by p21.
Cyclin-dependent kinase 8 mediates chemotherapy-induced tumor-promoting paracrine activities.
Specimen part
View SamplesNo description.
No associated publication
Sex, Specimen part, Cell line, Treatment
View SamplesDespite the documented benefits of breastfeeding and major governmental advocacy efforts, a paucity of data exists regarding the transfer of most drugs into breast milk. Passive diffusion governs the extent of accumulation for most drugs and the exposure risk can therefore be predicted using mathematical models. However, examples of xenobiotic accumulation into breast milk well above that predicted by passive diffusion have been documented and attributed to drug transport. A thorough evaluation of the expression of xenobiotic transporters in mammary epithelial cells (MECs), the cells that form the anatomical barrier between maternal serum and breastmilk, during lactation is necessary to determine the drugs for which an active transport mechanism governs transfer into breast milk and to improve predictive models.
No associated publication
Age, Specimen part, Disease
View SamplesMicroarray was used to study global gene expression of a cell culture model based on SV40-immortalized human corneal epithelial (iHCE) cells. The gene expression profile of the cell line was compared to the normal human corneal epithelium. Affymetrix HG-U133A GeneChips were used for microarray experiments and results were validated by performing RT-qPCR for selected genes. iHCE was found to over- and under-express 22 % and 14 % of the annotated genes, respectively. The results of this study suggest that differences between iHCE cells and normal corneal epithelium are substantial and therefore the use of these cells in corneal research should be considered with caution.
Gene expression analysis in SV-40 immortalized human corneal epithelial cells cultured with an air-liquid interface.
Cell line
View SamplesThis SuperSeries is composed of the SubSeries listed below.
No associated publication
Specimen part, Cell line
View SamplesTo explore the potential targets of Bmi1 in the liver development of hepatic carcinogenesis, we assayed the gene expression level in the liver of Bmi1 knockout mice. We isolated the liver tissue of Bmi1 WT and KO mice around 6-8 weeks. Then we extracted total RNA and run the microarray detection. Gene expression in Bmi1 KO mouse livers was compared with that in Bmi1 WT mouse livers to screen potential targets of Bmi1.
No associated publication
Specimen part
View SamplesBmi1 plays a pivotal role in hepatic carcinoma (HCC), but its targets in HCC is unknown. To screen the potential targets, we transfected HCC cell line Huh7 and Hep3B with Bmi1 shRNA lenti-virus. After confirming the Bmi1 was knocked down using western blotting, we extracted total RNA and then run the microarray detection. Gene expression profiles in Bmi1 KO cells were compared with those in Bmi1 WT cells to screen potential targets of Bmi1.
No associated publication
Cell line
View SamplesTo examine the transcriptome alteration caused by ZIC5 knockdown in melanoma, we performed gene expression microarray analysis.
ZIC5 Drives Melanoma Aggressiveness by PDGFD-Mediated Activation of FAK and STAT3.
Cell line
View SamplesPrenatal exposure to valproic acid, an established anti-epileptic drug, has been reported to impair postnatal cognitive function of children from epileptic mothers. Nevertheless, its pathology and proper treatment to minimize the effects remain unknown. In mice, we found that the postnatal cognitive function impairment was mainly caused by a reduction of adult neurogenesis and abnormal neuronal features in the hippocampus, which could be ameliorated by voluntary running.
Reduced Adult Hippocampal Neurogenesis and Cognitive Impairments following Prenatal Treatment of the Antiepileptic Drug Valproic Acid.
Sex, Specimen part, Treatment
View SamplesEstrogen clearly prevents osteoporotic bone loss by attenuating bone resorption. The molecular basis of how this is accomplished, however, remains elusive. Here we report a critical role of osteoclastic ERa in mediating estrogen action on bone in females. We selectively ablated ERa in differentiated osteoclasts (ERa dOc/dOc). ERa dOc/dOc females, but not males, exhibited clear trabecular bone loss, similar to the osteoporotic bone phenotype in post-menopausal women. Recovery of bone loss by estrogen treatment of the ovariectomized ERa dOc/dOc females was ineffective in the trabecular areas of the long bones and lumbar vertebral bodies. Osteoclastic apoptosis, induced by estrogen, occurred simultaneously with up-regulation of Fas ligand (FasL) expression in intact trabecular bones of ERa +/+mice, but not in ERa dOc/dOc mice. ERa was also required for similar effects of estrogen and tamoxifen in cultured osteoclasts. These findings suggest that the osteoprotective actions of estrogen and SERMS are mediated at least in part through osteoclastic ERa in trabecular bone; and the life span of mature osteoclasts is regulated through activation of the Fas/FasL system.
Estrogen prevents bone loss via estrogen receptor alpha and induction of Fas ligand in osteoclasts.
Sex, Specimen part
View Samples