24 research outputs found
Identification and characterisation of putative seminal fluid proteins from male reproductive tissue EST libraries in tiger beetles
Single Umbilical Artery and Associated Malformations in over 5500 Autopsies: Relevance for Perinatal Management
Myasthenia Gravis with Concomitant Severe Paraspinal Muscle Degeneration and Mitochondrial DNA4977 Deletion
Assessment of established techniques to determine developmental and malignant potential of human pluripotent stem cells
The International Stem Cell Initiative compared several commonly used approaches to assess human pluripotent stem cells (PSC). PluriTest predicts pluripotency through bioinformatic analysis of the transcriptomes of undifferentiated cells, whereas, embryoid body (EB) formation in vitro and teratoma formation in vivo provide direct tests of differentiation. Here we report that EB assays, analyzed after differentiation under neutral conditions and under conditions promoting differentiation to ectoderm, mesoderm, or endoderm lineages, are sufficient to assess the differentiation potential of PSCs. However, teratoma analysis by histologic examination and by TeratoScore, which estimates differential gene expression in each tumor, not only measures differentiation but also allows insight into a PSC’s malignant potential. Each of the assays can be used to predict pluripotent differentiation potential but, at this stage of assay development, only the teratoma assay provides an assessment of pluripotency and malignant potential, which are both relevant to the pre-clinical safety assessment of PSCs