The Program in Genomics of Differentiation (PGD) is a diverse and highly interactive program in cellular, molecular, and developmental biology research within the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), Division of Intramural Research (DIR). With 19 primary investigators, the PGD is the largest program in the NICHD DIR, encompassing a variety of research areas, including developmental differentiation and patterning, chromatin dynamics and epigenetics, the immune system, the viral life cycle, DNA replication, gene regulation, and RNA metabolism. Program investigators perform research using a wide variety of models including viruses, bacteria, mammalian cell culture, yeast, fruit flies, zebrafish, frogs, and mice. Vertebrate models are a major focus of the program. The zebrafish is used as a model for analysis of embryonic development and organogenesis as well as for modeling certain human conditions. Using genetics, genomics, and high-resolution imaging techniques, PGD investigators study cell-cell signaling and cellular behavior in early embryogenesis, formation and morphogenesis of the vascular system, cellular specification in the developing nervous system, and cellular and molecular mechanisms underlying behavior. The mouse provides another important vertebrate model. PGD investigators employ advanced gene-targeting and transgenic technologies to study genes that control mouse development, including transcriptional control in the early embryo, the role of Lim-homeobox genes and chromatin-binding proteins, mechanisms of genomic imprinting, regulation of immune cells, the development of the central and peripheral nervous systems, and the behavior of neural stem cells in the adult organism. In addition, the Program generates mouse models of a diverse array of human genetic disorders.
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