The induction of dendritic cell (DC) maturation is critical for the induction of Ag-specific T lymphocyte responses and may be essential for the development of human vaccines relying on T cell immunity. In this study, we have investigated the effects of monophosphoryl lipid A (MPL) on human monocyte-derived DC as well as peripheral blood T cells. Calcium mobilization, mitogen-activated protein ...

The aim of the present study was to compare the effect of lutein- and zeaxanthin-rich foods and supplements on macular pigment level (MPL) and serological markers of endothelial activation, inflammation and oxidation in healthy volunteers. We conducted two 8-week intervention studies. Study 1 (n 52) subjects were randomised to receive either carrot juice (a carotene-rich food) or spinach powder...

In this study, we examined the in vitro and in vivo effects of forced expression of Mpl-R (the thrombopoietin receptor) on the progeny of murine hematopoietic stem cells. Bone marrow cells from 5-FU-treated mice were transduced with retroviral vectors containing the human Mpl-R cDNA, or the neomycine gene as a control. After 7 days cocultivation on virus-producer cells, GpE86-Mpl-R or Gp86-Neo,...

Thrombopoietin (TPO) and its receptor c-Mpl are the primary regulators of megakaryocytopoiesis and play a critical role in hematopoietic stem cell biology. Upon TPO binding, c-Mpl facilitates tyrosine (Y) phosphorylation of cytoplasmic signaling proteins and activation of several pathways that control cellular proliferation, megakaryocyte development, and survival. Turning off the TPO signal is...

Thrombopoietin and its receptor (MPL) are important regulators of megakaryopoiesis. We have identified an activating mutation of MPL using a combination of a retrovirus-mediated gene transfer and polymerase chain reaction-driven random mutagenesis. This point mutation causes a single amino acid substitution from Ser498 to Asn498 in the transmembrane region and abrogates factor-dependency of all...

The MPL (W515L and W515K) mutations have been detected in granulocytes of patients suffering from certain types of primitive myelofibrosis (PMF). It is still unknown whether this molecular event is also present in lymphoid cells and therefore potentially at the hematopoietic stem cell (HSC) level. Toward this goal, we conducted MPL genotyping of mature myeloid and lymphoid cells and of lymphoid...

Recent studies have shown decreased megakaryocyte expression of the thrombopoietin receptor (c-mpl) in patients with polycythemia vera (PV) but not in those with reactive erythrocytosis. We examined the diagnostic utility of this observation in 22 patients with PV, 7 patients with secondary erythrocytosis (SE), and 10 normal controls. Commercial antibodies against c-mpl were used with standard ...

PURPOSE To review the most important metabolic effects and clinical safety data of subthreshold micropulse diode laser (D-MPL) in diabetic macular edema (DME). METHODS Review of the literature about the mechanisms of action and role of D-MPL in DME. RESULTS The MPL treatment does not damage the retina and is selectively absorbed by the retinal pigment epithelium (RPE). MPL stimulates secret...

Cisplatin is an effective chemotherapeutics against a wide range of cancers. However, it causes significant nausea and vomiting which limit its usefulness. In the present study, the effects of methanolic root extract of Pluchea lanceolata (DC.) C. B. Clarke , asteraceae ( MPL ) was investigated against cisplatin-induced nausea using a rat pica model. In rat pica model, rats react to cispla...

The "zinc-finger" transcription factor GATA-1 was first shown in cells of erythroid lineage. It is also expressed in cells of other hematopoietic lineages including megakaryocytes, mast cells, and eosinophils. GATA-1 is now considered to be one of the central regulators in hematopoietic cell differentiation. To further analyze the role of GATA-1 in controlling differentiation from hematopoietic...