Rattus norvegicus
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ABSTRACT:
PROVIDER: PRJNA126965 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:The initial segment of the epididymis is vital for male fertility, therefore, it is important to understand the mechanisms that regulate this important region. Deprival of testicular luminal fluid factors/lumicrine factors from epididymis, a subset of cells within the initial segment undergo apoptosis. In this study, microarray analyses was used to examine early changes in the downstream signal transduction pathways following the loss of lumicrine factors, and we discovered the following cascade of events leading to loss of protection and eventual apoptosis. First, mRNA expression of several key components of ERK pathway decreased sharply after 6 hours of loss protection from testicular lumicrine factors. After 12 hours, the levels of mRNA expression of STAT and NF-кB pathways components increased, mRNA expression of genes encoding cell cycle inhibitors increased. After 18 hours of loss protection from testicular lumicrine factors, apoptosis was observed in the initial segment. In conclusion, testicular lumicrine factors protect the cells of the initial segment by activating ERK pathway, repressing STAT and NF-кB pathways, and preventing a cascade of reactions leading to apoptosis.
2011-03-11 | GSE21806 | GEO
Project description:The initial segment of the epididymis is vital for male fertility, therefore, it is important to understand the mechanisms that regulate this important region. Deprival of testicular luminal fluid factors/lumicrine factors from epididymis, a subset of cells within the initial segment undergo apoptosis. In this study, microarray analyses was used to examine early changes in the downstream signal transduction pathways following the loss of lumicrine factors, and we discovered the following cascade of events leading to loss of protection and eventual apoptosis. First, mRNA expression of several key components of ERK pathway decreased sharply after 6 hours of loss protection from testicular lumicrine factors. After 12 hours, the levels of mRNA expression of STAT and NF-кB pathways components increased, mRNA expression of genes encoding cell cycle inhibitors increased. After 18 hours of loss protection from testicular lumicrine factors, apoptosis was observed in the initial segment. In conclusion, testicular lumicrine factors protect the cells of the initial segment by activating ERK pathway, repressing STAT and NF-кB pathways, and preventing a cascade of reactions leading to apoptosis. Unilateral efferent duct ligation (EDL) surgeries were performed to block lumicrine testicular fluid factors from reaching one side of epididymis. For the control, a sham operation was performed on the contra-lateral side within the same animal. After 6, 12 and 18 hours of EDL, the most proximal region of the initial segment containing zone 1a and 1b of initial segment was dissected out. In this microarray study, sham control and each time point of EDL (sham, 6h EDL, 12h EDL, 18h EDL) all have 4 replicates, a total of 16 arrays were hybridized.
2011-03-11 | E-GEOD-21806 | biostudies-arrayexpress
Project description:RNA sequencing analysis of busulfan-treated initial segment-caput epididymis.
| PRJNA1040783 | ENA
Project description:RNA sequencing analysis of Ovch2 knockout initial segment-caput epididymis.
| PRJNA1105058 | ENA
Project description:We found that 5-Aza-dC/decitabine induces various prosurvival pathways (JAK-STAT-, NFkB-, MEK/ERK- and PI3K/AKTpathway) in cHL cell lines. Inhibition of these pathways with specific small molecular weight inhibitors potentiates the antitumor effect of 5-Aza-dC.
2017-08-01 | GSE86068 | GEO
Project description:A fully developed initial segment, the most proximal region of the epididymis, is important for male fertility. Conditional deletion of Pten from the initial segment from postnatal day 17 onwards resulted in de-differentiation of the initial segment. When spermatozoa progressed through the de-differentiated epididymal duct, they developed angled flagella, suggesting compromised sperm maturation, which eventually resulted in male infertility. To understand mechanisms that underlie this sperm maturation defect following loss of Pten, we compared transcriptome profile of the initial segment between controls and knockouts and revealed that the transporter activity was one of the top molecular and cellular functions altered following loss of Pten. Alteration in the protein levels and localization of several transporters following loss of Pten were also observed by immunofluorescence analysis. Epithelial cells of the initial segment from knockouts are more permeable to Fluorescein isothiocyanate-dextran (4000da) compared to controls. When analyzing GEO datasets with Pten deletion in the prostate and inner ear of mice, alteration in transporter activity was also found in these Pten knockout mouse models, suggesting it is a common phenomenon. PTEN regulates transporter activities probably through regulation of cell shape, size, and membrane property, which in turn regulates the intracellular and intercellular micro-environment.
2019-12-19 | GSE92614 | GEO
Project description:Purpose: The purpose of this study is to characterize gene expression in the Ovch2-ablated mouse initial segment (IS)-caput epididymis. Methods: Ovch2-/- mice were used when they were 14-week-old. IS-caput epididymal mRNA profiles were generated by deep sequencing, in triplicate, using Illumina NovaSeq6000. Results: RNA-seq data identified differentially expressed transcripts. Conclusions: Our results show that the expression of many genes was not critically affected by Ovch2 ablation.
2024-05-01 | GSE265964 | GEO
Project description:The testis, efferent ductules, epididymis, and vas deferens, constituting the majority of male reproductive tract, are the regions for testosterone production, spermatogenesis, and sperm maturation, storage and discharge, but whether these regions change during aging is unknown. Here, we addressed this by investigating the adult (3-month) and aged (18-month) transcriptomes from seven regions of male mouse reproductive tract：the testis, efferent ductules, initial segment, caput, corpus and cauda epididymis, and vas deferens. We identified various of region-specific genes across different regions of male mouse reproductive tract. Moreover, we identified region-dependent changes of transcripts at an anatomic resolution. This study provides a framework for futher studies on male reproducitve aging.
2022-03-02 | GSE181426 | GEO
Project description:RNA sequencing analysis of unilateral orchidectomy, bilateral orchidectomy, and Nell2 knockout initial segment-caput epididymis.
| PRJNA1040284 | ENA
Project description:Through the study of EGFR-mutant lung adenocarcinoma we show that NFkB signaling is rapidly engaged by EGFR oncogene inhibition to promote tumor cell persistence and therapy resistance. Unexpectedly, we found that EGFR oncogene inhibition induced an EGFR-TRAF2-RIP1-IKK complex that stimulated an NFkB-mediated transcriptional survival program. We identified a direct pharmacologic NFkB inhibitor, PBS-1086, that suppressed this adaptive survival program and increased both the magnitude and duration of initial EGFR TKI response in cellular and in vivo tumor models, including a novel patient-derived NSCLC xenograft. These findings unveil NFkB as a critical adaptive survival mechanism engaged in response to EGFR oncogene inhibition and identify PBS-1086 as a promising NFkB inhibitor to eliminate disease persistence and potentially prevent the emergence of resistance in patients. RNAseq analysis of 11-18 (EGFR-mutant lung adenocarcinoma) cells in the context of drug treatment with erlotinib and/or genetic or pharmacological inactivation of NFkB
2015-02-03 | E-GEOD-65420 | biostudies-arrayexpress