Project description:We report the discovery of six novel miRNAs expressed by Herpesvirus saimiri (strain A11). These miRNAs are generated by a non-canonical biogenesis pathway that does not require the Microprocessor complex. Examination of one sample prepared from common marmoset (Callithrix jacchus) T cells latently infected with Hespesvirus saimiri (strain A11).
Project description:In primates, high-acuity vision is mediated by the fovea, a small specialized central region of the retina. The fovea, unique to the anthropoid lineage among mammals, undergoes notable neuronal morphological changes during postnatal maturation. However, the degree of cellular similarity across anthropoid foveas and the molecular underpinnings of foveal maturation remain unclear. Here, we used high throughput single cell RNA sequencing (scRNA-seq) to profile retinal cells of the common marmoset (Callithrix jacchus), an early divergent in anthropoid evolution from humans, apes, and macaques. We generated atlases of the marmoset fovea and peripheral retina for both neonates and adults.
Project description:Epstein-Barr virus (EBV)-based episomal vector system enables persistent transgene expression, which is advantageous for efficient derivation of transgene-free induced pluripotent stem cells (iPSCs) without viral transduction. Here, we report establishment of an iPSC line from somatic fibroblasts of a neonatal common marmoset monkey (marmoset; Callithrix jacchus) using an all-in-one episomal vector that we newly developed. The established iPSC line, named NM-iPS, showed standard characteristics of pluripotency such as pluripotency-related marker expression, three germ layer differentiation, and normal karyotype (2n = 46). The novel iPSC line would be a useful resource for stem cell research using non-human primates.
Project description:Extended pluripotent stem cells (EPSCs) derived from mice and humans showed an enhanced potential for chimeric formation. By exploiting transcriptomic techniques, we assessed the differences in gene expression profile between extended EPSCs derived from mice and humans, and those newly derived from the common marmoset (marmoset; Callithrix jacchus). Although the marmoset EPSC-like cells displayed a unique colony morphology distinct from murine and human EPSCs, they displayed a pluripotent state akin to embryonic stem cells (ESCs), as confirmed by gene expression and immunocytochemical analyses of pluripotency markers and three-germ-layer differentiation assay. Importantly, the marmoset EPSC-like cells showed interspecies chimeric contribution to mouse embryos, such as E6.5 blastocysts in vitro and E8.5 epiblasts in vivo in mouse development. Also, we discovered that the perturbation of gene expression of the marmoset EPSC-like cells from the original ESCs resembled that of human EPSCs. Thus, we established the efficacy of the method for the derivation of marmoset EPSCs
