Project description:Lhx8 is a member of the LIM-homeobox transcription factor family and preferentially expressed in oocytes and germ cells within the mouse ovary. We discovered that Lhx8 knockout females lose oocytes within 7 days after birth. At the time of birth, histological examination shows that Lhx8 deficient (Lhx8(-/-)) ovaries are grossly similar to the newborn wild type ovaries. Lhx8(-/-) ovaries fail to maintain the primordial follicles and the transition from primordial to growing follicles does not occur. Lhx8(-/-) ovaries misexpress oocyte-specific genes such as Gdf9, Pou5f1, and Nobox. Very rapid loss of oocytes may partly be due to drastic the down-regulation of Kit and Kitl in Lhx8(-/-) ovaries. We compared Lhx8(-/-) and wild-type ovaries using Affymetrix 430 2.0 microarray platform. Eighty (44%) of 180 of the genes down-regulated more than 5-fold in Lhx8(-/-) ovaries were preferentially expressed in oocytes, whereas only 3 (2%) of 146 genes up-regulated more than 5-fold in the absence of Lhx8 were preferentially expressed in oocytes. In addition, the comparison of genes regulated in Lhx8(-/-) and Nobox(-/-) newborn ovaries discovered a common set of 34 genes whose expression level is affected in both Lhx8 and Nobox deficient mice. Our findings show that Lhx8 is a critical factor for maintenance and differentiation of the oocyte during early oogenesis and it acts in part by down-regulating the Nobox pathway. This SuperSeries is composed of the following subset Series: GSE7774: Transcriptional changes in Lhx8 Null newborn mouse ovaries GSE7775: Microarray Analyses of Newborn Mouse Ovaries Lacking Nobox GSE7776: Ovarian Transcript Expression in Newborn Mouse Refer to individual Series
Project description:Roswell Park Human 19K Array CGH<br><br>the format of the data is:<br> <br>Reporter Identifier<br>Band<br>Count - number of replicate spots the data represents (some spots are excluded in image analysis, usually because they are too dim to be reliable)<br>chr - Chromosome<br>Start - Start location in base pairs<br>Stop - Stop Location in Base pairs<br>Center - Center in base pairs<br>g_loc - graphing location this is the location of the center in base pairs if the chromosomes were laid end to end<br>Log2 ratio - log2 ratio (test/control)<br>Ratio - linear version of the ratio above <br>A - Measure of brightness A=(log2 cy3 + log2 cy5)/2 <br>Flag - Used to color code spots<br> 3 - red probably mismapped<br> 4 - green potentially polymorphic<br> 5 - light blue Shows a high degree of duplication with other area in the genome (see UCSC genome browser) <br>reference - Reference for why the clone was flagged <br>Pub Med link - Pub Med ID for why clone was flagged
Project description:Investigation of differentially expressed genes in human HCT116 cells after knockdown of FBXO28 for 16h and 36h. FBXO28 knockdown and control HCT116 cells. 4 replicates per time point (16h, 36h), including dye swaps.
Project description:We investigate the relevance of RNA integrity in gene expression analysis as well as analysis methods to accommodate the possible effects of degradation using paired tumour and normal samples from colorectal cancer patients undergoing colonic resection.