Thus, expression of HLA class I molecules does not suffice for promoting engraftment of pro-T cells derived from bone marrow and efficient development of human T cells, whilst expression of HLA class II does.
Recent advances in engineering complex organs in vitro inspire the development of human bone marrow equivalents to foster scientific discovery and innovative therapeutics.
Thus, these results indicated that expression of HLA-DR4 molecules in DRAG mice favored HSC engraftment in bone marrow and more importantly, promoted the development of human thymocytes.
The transplantation of HSCs derived from bone marrow, umbilical cord blood (UBC), or G-CSF mobilized peripheral blood leads to the development of human hematopoietic proG-CSF mobilizedferentiated cells in the mouse bone marrow, speripheralthymus, culminating in a functional human immune system17,19,20,21.
Emerging evidence suggests that both bone-marrow-derived MSCs and mature stromal cells can play an important role in the growth and development of human malignancies[ 19, 20].
However, the presence of human fibroblast and chondrocyte-like cells in the hTEBCs suggests that a fraction of mesenchymal progenitor-like cells persists in the implanted cell population, accounting for the development of human-derived mesenchymal tissues other than bone.
Previous studies have utilized tissue-engineered constructs as an alternative to human bone chips for the development of humanized bone metastasis models in mice (Schuster et al., 2006; Moreau et al., 2007).
During endochondral bone development, invasion of the primary ossification center artery precedes bone formation [21].
Taken together, this reporter system provides a novel system to monitor the osteogenic differentiation of hESCs and becomes useful to identify soluble agents and cell signaling pathways that mediate early stages of human bone development.
Moreover, a new function of Tnni2 in the regulation of bone development may have also advanced current understanding of the pathological mechanism of human DA2B disorder (Zhu et al., 2014).
