Project description:This SuperSeries is composed of the following subset Series: GSE14055: Changes in polysome loading as a consequence of RHA downregulation GSE14056: Co-immunoprecipitation of RNAs with RNA helicase A (RHA) Refer to individual Series
Project description:The landscape of host circular and linear RNAs response to simian virus 40 infection unveils the key regulatory connections among diverse coding and noncoding RNAs
Project description:We describe a genome reference of the African green monkey or vervet (Chlorocebus aethiops). This member of the Old World monkey (OWM) superfamily is uniquely valuable for genetic investigations of simian immunodeficiency virus (SIV), for which it is the most abundant natural host species, and of a wide range of health-related phenotypes assessed in Caribbean vervets (C. a. sabaeus), whose numbers have expanded dramatically since Europeans introduced small numbers of their ancestors from West Africa during the colonial era. We use the reference to characterize the genomic relationship between vervets and other primates, the intra-generic phylogeny of vervet subspecies, and genome-wide structural variations of a pedigreed C. a. sabaeus population. Through comparative analyses with human and rhesus macaque, we characterize at high resolution the unique chromosomal fission events that differentiate the vervets and their close relatives from most other catarrhine primates, in whom karyotype is highly conserved. We also provide a summary of transposable elements and contrast these with the rhesus macaque and human. Analysis of sequenced genomes representing each of the main vervet subspecies supports previously hypothesized relationships between these populations, which range across most of sub-Saharan Africa, while uncovering high levels of genetic diversity within each. Sequence-based analyses of major histocompatibility complex (MHC) polymorphisms reveal extremely low diversity in Caribbean C. a. sabaeus vervets, compared to vervets from putatively ancestral West African regions. In the C. a. sabaeus research population, we discover the first structural variations that are, in some cases, predicted to have a deleterious effect; future studies will determine the phenotypic impact of these variations.
Project description:Given that RHA regulates translation by binding a PCE located at the 5’ UTR of the target transcripts a genome-wide screen was performed to identify mRNAs that bind RHA in vivo. The results from four experiments with samples obtained in four independent RNA immunoprecipitations identified 375 transcripts that co-immunoprecipitate with FLAG RHA. Since N-terminal FLAG tagged RHA specifically co-immunoprecipitates PCE-containing mRNAs HEK293 cells were transfected with a CMV-FLAG-RHA construct. Cytoplasmic lysates were immunoprecipitated with anti-FLAG beads. RNA was extracted from the immunoprecipitate and used to probe a human Agilent expression arrays. An immunoprecipitation with cells transfected with empty FLAG plasmid was used as negative control.
Project description:Pheochromocytoma, a rarely reported adrenal gland neoplasm in Old World primates, was diagnosed in 5 rhesus macaques (Macaca mulatta) and 2 African green monkeys (Chlorocebus aethiops) from 3 research institutions. Age and sex were available for 6 primates. Two males and 4 females were affected, ranging in age from 9 to 31 years. All neoplasms were unilateral and, in the cases reporting the affected gland, 4 involved the right adrenal gland and 2 involved the left. Diagnosis was established by characteristic histologic features. Immunohistochemically, neoplastic cells in all cases expressed chromogranin A and met-enkephalin and were negative for melan-A and inhibin. Six of 7 tumors were positive for ?-endorphin. Pulmonary metastases were present in 2 rhesus macaques and portal vein invasion in 1 African green monkey. To the authors' knowledge, this is the first report of malignant pheochromocytoma in Old World primates.