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Life Sciences

Washington University in St. Louis

2020

Hematopoiesis

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The Role Of Cdx4 During Patterning Of Definitive Hemogenic Mesoderm, John Philip Creamer Aug 2020

The Role Of Cdx4 During Patterning Of Definitive Hemogenic Mesoderm, John Philip Creamer

Arts & Sciences Electronic Theses and Dissertations

The current standard of treatment for a variety of hematopoietic malignancies and genetic disorders is allogenic bone marrow transplantation, where donor hematopoietic stem cells (HSCs) engraft within the host and give rise to all of them hematopoietic lineages necessary for homeostasis. In many cases, finding a compatible human leukocyte antigen (HLA) matching donor is not possible, due to the large amount of genetic variation at those loci, but with the advent of induced pluripotent stem cells (iPSCs), unlimited sources of patient matched cells can be derived. Hematopoietic differentiations of human pluripotent stem cells (hPSCs) have been shown to recapitulate the …


Dendritic Cell Development And Function, Vivek Durai May 2020

Dendritic Cell Development And Function, Vivek Durai

Arts & Sciences Electronic Theses and Dissertations

Dendritic cells (DCs) are a group of immune cells that include both classical dendritic cells (cDCs) and plasmacytoid dendritic cells (pDCs). cDCs are further comprised of two distinct subsets, cDC1s and cDC2s, which play critical roles in the initiation of innate and adaptive immune responses. Understanding how these lineages develop and function is therefore paramount. All DCs require the receptor tyrosine kinase Flt3 and its ligand Flt3L for their development, but the loss of Flt3L in mice leads to a more severe DC deficiency than does the loss of Flt3. This has led to speculation that Flt3L can bind to …