Project description:Primary objectives: The primary objective is to investigate circulating tumor DNA (ctDNA) via deep sequencing for mutation detection and by whole genome sequencing for copy number analyses before start (baseline) with regorafenib and at defined time points during administration of regorafenib for treatment efficacy in colorectal cancer patients in terms of overall survival (OS).
Primary endpoints: circulating tumor DNA (ctDNA) via deep sequencing for mutation detection and by whole genome sequencing for copy number analyses before start (baseline) with regorafenib and at defined time points during administration of regorafenib for treatment efficacy in colorectal cancer patients in terms of overall survival (OS).
Project description:To further knowledge of piglet maturity, we have developed a microarray analysis to describe biological processes and to find candidate genes for key roles in piglet maturity. The objective was to identify which genes and biological processes are specifically involved in the difference between two extreme breeds: Large White (LW) and Meishan (MS). The LW breed is a selected breed known to show an increased rate of mortality at birth, while the MS breed presents more robust piglets at birth. MS and LW sows were inseminated with mixed semen (LW and MS) hence each litter was composed of pure fetuses (LW or MS) and crossed fetuses (LWMS from MS sows and MSLW from LW sows).
Project description:To further knowledge of piglet maturity, we have developed a microarray analysis to describe biological processes and to find candidate genes for key roles in piglet maturity. The objective was to identify which genes and biological processes are specifically involved in the difference between two extreme breeds: Large White (LW) and Meishan (MS). The LW breed is a selected breed known to show an increased rate of mortality at birth, while the MS breed presents more robust piglets at birth. MS and LW sows were inseminated with mixed semen (LW and MS) hence each litter was composed of pure fetuses (LW or MS) and crossed fetuses (LWMS from MS sows and MSLW from LW sows).
Project description:Purpose:The goal of this study was to enrich understanding of the reproductive difference Methods: Multiparous Canadian Large White cyclic sows were divided into two parts: high (H; total number of piglets born > 15.73) and low (L; total number of piglets born < 11.11) fecundity. Eight sows with similar parity from each part were chosen (n=16). Ovarian tissues were obtained on the 14 day (day 1 = first day of estrus) after estrus as in the luteal phase (L) and 20 day of the estrous cycle as in the follicular phase (F). Transcriptome profiling of ovarian tissues were generated by deep sequencing, in quadruplicate, using Illumina HiSeq X10 instrument. Results: Using an optimized data analysis workflow, we obtained the differentially expressed miRNAs between the high and low fecundity, with a fold change ≥1.5 and p value < 0.05. These results provide further insight into fecundity in pigs. Conclusions: Our study represents the first detailed analysis of ovary transcriptome. It will be significantly helpful to display a novel regulatory mechanism for further investigation of prolificacy in pigs.
2020-09-02 | GSE132307 | GEO
Project description:Whole-genome resequencing of Large White pig
Project description:Purpose:The goal of this study was to enrich understanding of the reproductive difference Methods:Multiparous Canadian Large White cyclic sows were divided into two parts: high (H; total number of piglets born > 15.73) and low (L; total number of piglets born < 11.11) fecundity. Eight sows with similar parity from each part were chosen (n=16). Ovarian tissues were obtained on the 14 day (day 1 = first day of estrus) after estrus as in the luteal phase (L) and 20 day of the estrous cycle as in the follicular phase (F). Transcriptome profiling of ovarian tissues were generated by deep sequencing, in quadruplicate, using Illumina HiSeq X10 instrument. Results: Using an optimized data analysis workflow, we obtained the differentially expressed RNAs between the high and low fecundity, with a fold change ≥1.5 and p value < 0.05. These results provide further insight into fecundity in pigs. Conclusions: Our study represents the first detailed analysis of ovary transcriptome. It will be significantly helpful to display a novel regulatory mechanism for further investigation of prolificacy in pigs.
Project description:We sought to more precisely characterize the different alpha-synuclein (aSyn) 3’UTR mRNA species in normal and PD human brain. High-throughput, whole-transcriptome sequencing of the 3’UTR ends of polyadenylated mRNA transcripts (termed pA-RNAseq; see Methods) was performed on a cohort of 17 unaffected and 17 PD cerebral cortical tissue samples. This revealed 5 aSyn 3’UTR isoforms, with lengths of 290, 480, 560, 1070 and 2520 nt. Of these, the 560 nt and 2520 nt forms were predominant. The existence and relative preponderance of these species was further confirmed by Northern Blot. We next hypothesized, that aSyn 3’UTR selection might be altered in PD. Comparison of pA-RNAseq profiles from PD and unaffected cerebral cortex samples revealed an increase in the preponderance of the long 3’UTR species (>560 nt) relative to shorter species (<560 nt). Such a relative increase in aSynL was confirmed by Quantitative real-time RT-PCR (rt-qPCR) and appeared specific for PD, as the increase was also observed by comparison to RNA from amyotrophic lateral sclerosis patient samples. We note that the modified aSyn 3’UTR selection associated with PD patient tissue was detected in cerebral cortex tissue, which typically harbors pathological evidence of the disease process without frank cell loss; thus, this phenotype is unlikely to be a secondary consequence of neurodegeneration.
Project description:The Chinese Erhualian is one of the most prolific pig breeds in the world, which farrows at least five more piglets per litter than Western pig breeds partly due to a greater ovulation rate. Differences in the transcriptome of Chinese Erhualian and Large White ovaries directly result in variation of ovulation rate. To understand the molecular basis related to ovulation rate in Chinese indigenous and Western breeds, samples were collected and used to hybridized. This study reveals many potential avenues of investigation for seeking new insights into ovarian physiology and the genetic control of reproduction. Expression profiling experiments were conducted to identify differentially expressed genes in ovarian follicles at the preovulatory stage of a PMSG-hCG stimulated estrous cycle from 3 Chinese Erhualian and 3 Large White cycling sows by using the Affymetrix Porcine Genechip™.
Project description:Background: While the mechanisms underlying the lactation-induced adaptations of intermediary metabolism and immune response have been extensively studied in rodents and dairy cows, little is known in this regard in sows. Therefore, the present study aimed to explore the lactation-induced changes in hepatic gene expression in sows during lactation. Results: Using a porcine whole-genome microarray a total of 632 differentially expressed genes in the liver of lactating compared to non-lactating sows (each n = 10) could be identified. Enrichment analysis revealed that the differentially expressed genes were mainly involved in fatty acid metabolism, pyruvate metabolism, glutathione metabolism, glycine, serine and threonine metabolism, citrate cycle, glycerophospholipid metabolism, PPAR signaling, nitrogen metabolism, and focal adhesion. The most striking observation with respect to intermediary metabolism was that genes involved in fatty acid catabolism, the catabolism of gluconeogenic amino acids, the citrate cycle and the respiratory chain were up-regulated in the liver of sows during lactation. With respect to immune response, it could be demonstrated that genes encoding acute phase proteins and genes involved in tissue repair were up-regulated and genes encoding focal adhesion molecules were down-regulated in the liver of sows during lactation. Conclusion: The results from this study indicate that energy-generating pathways and pathways involved in the delivery of gluconeogenic substrates are induced in the liver of sows during lactation. The alterations of expression of genes encoding proteins involved in immune response suggest that lactation in sows may cause an adaptive immune response which possibly counteracts hepatic inflammation.