Project description:The species-specific identification of fibre origin is essential in archaeology but reveals challenging for closely related species. This is particularly true between the four South American Camelids (SAC) species: alpaca, guanaco, llama and vicuña. The analysis of proteins extracted from hairs and/or yarns by proteomics has emerged as a powerful method to differentiate between species. However, for SAC, the database information available is very poor, which limits this approach. In this study, we analysed 42 modern and 4 archaeological reference samples from the four SAC species.
Project description:We performed a genome wide methylation scan using the Illumina HumanMethylation27 BeadChip on DNAs extracted from the leukocytes of 8 hypertensive cases and 8 normotensive age-matched controls. All subjects were African American males aged 14-23 years.
Project description:We performed a genome wide methylation scan using the Illumina HumanMethylation27 BeadChip on DNAs extracted from the leukocytes of 7 obese (BMI≥99th percentile for age and sex) and 7 lean (BMI≤10th percentile for age and sex) African American males aged 14-18 years.
2010-11-29 | GSE25301 | GEO
Project description:the runs of homozygosity of Jinhua pigs
Project description:South American camelids (SACs) play an important role in Andean economies, but reproductive inefficiencies, especially early embryonic losses, present significant challenges to herd productivity. This study provides the first proteomic analysis of preimplantation alpaca embryos, offering insights into the molecular mechanisms underlying embryo development and implantation. Using mass spectrometry, we identified 510 proteins in 15-day post-mating (dpm) alpaca embryos. Functional enrichment analysis revealed significant pathways related to cytoskeletal organization, metabolism, embryo elongation, and implantation. Key proteins associated with conceptus elongation, maternal recognition of pregnancy, and steroidogenesis were detected, including keratins (KRT8, KRT18), actin (ACTG1), annexin A2 (ANXA2), and enzymes involved in estradiol and cortisol biosynthesis. Additionally, proteins involved in prostaglandin synthesis, including PTGS2, were identified, supporting their role in conceptus elongation and implantation. This pioneering study provides a foundational dataset for understanding alpaca embryo development at the proteomic level, opening new paths for improving reproductive technologies in SACs. The findings highlight the molecular processes driving alpaca embryogenesis and provide a basis for future research on optimizing assisted reproductive technologies in camelids.
Project description:To define the genome-wide activity of Cas9-sgRNA directed at the gamma-globin promoter genes, we performed CHANGE-seq and identified 678 off-target sites from plerixafor-mobilized normal donors of African American ancestry (pre-GMP engineering runs, n = 3). Most of these off-targets are in intergenic and intronic regions of the human genome, as expected based on their relative genomic proportions. We selected the 277 CHANGE-seq candidate sites reproducibly identified in 2 or more biological donors and in silico predicted sites for multiplexed targeted amplicon sequencing (rhAmp-seq, IDT).