Mechanism of co-operation of mutant α and mutant in acute lymphoblastic leukemia: role of MYC.

Acute lymphoblastic leukemia (ALL) is an aggressive leukemia which can be derived from either T-cell or B-cell precursors. With current treatments, the survival rate is high, but the treatments are highly toxic with severe side effects. Individual mutations in IL7Ra and RAS pathways have been previously shown to be prevalent in ALL, and especially in relapsed patients.

Co-Culture and Transduction of Murine Thymocytes on Delta-Like 4-Expressing Stromal Cells to Study Oncogenes in T-Cell Leukemia.

Transduced mouse immature thymocytes can be differentiated into T cells in vitro using the delta-like 4-expressing bone marrow stromal cell line co-culture system (OP9-DL4). As retroviral transduction requires dividing cells for transgene integration, OP9-DL4 provides a suitable in vitro environment for cultivating hematopoietic progenitor cells. This is particularly advantageous when studying the effects of the expression of a specific gene during normal T cell development and leukemogenesis, as it allows researchers to circumvent the time-consuming process of generating transgenic mice.

A Focused Review of Ras Guanine Nucleotide-Releasing Protein 1 in Immune Cells and Cancer.

Four Ras guanine nucleotide-releasing proteins (RasGRP1 through 4) belong to the family of guanine nucleotide exchange factors (GEFs). RasGRPs catalyze the release of GDP from small GTPases Ras and Rap and facilitate their transition from an inactive GDP-bound to an active GTP-bound state. Thus, they regulate critical cellular responses via many downstream GTPase effectors.

IL-7: Comprehensive review.

Overview: IL-7 is a member of the family of cytokines with four anti-parallel α helixes that bind Type I cytokine receptors. It is produced by stromal cells and is required for development and homeostatic survival of lymphoid cells.

Genomic Architecture: Interleukin 7 (IL7) human IL7: gene ID: 3574 on ch 8; murine Il7 gene ID: 16,196 on ch 3.

Mutations that collaborate with IL-7Ra signaling pathways to drive ALL.

The IL-7 pathway is required for normal T cell development and survival. In recent years the pathway has been shown to be a major driver of acute lymphoblastic leukemia (ALL), the most common cancer in children. Gain-of-function mutations in the alpha chain of the IL-7 receptor found in ALL patients clearly demonstrated that this pathway was a driver.