Search results for "AEM"
showing 10 items of 1006 documents
Role of SHP2 for FLT3-dependent proliferation and transformation in 32D cells.
2008
Fms-like tyrosine kinase 3 (FLT3) is a class III receptor tyrosine kinase, which plays a role in proliferation and differentiation of B-cell progenitors, myelomonocytic and dendritic cells, as well as in the maintenance of pluripotent hematopoietic stem cells (reviewed in Stirewalt and Radich,1and Schmidt-Arras et al.2). Recently, FLT3 has received much attention as an important oncoprotein. Mutations in FLT3 that lead to constitutive activation are among the most common molecular lesions found in acute myeloid leukemia.3 The most prevalent type of mutations result in internal tandem duplications (ITD) of amino-acid stretches in the juxtamembrane domain of FLT3. FLT3-ITD is constitutively a…
SOCS2 controls proliferation and stemness of hematopoietic cells under stress conditions and its deregulation marks unfavorable acute leukemias
2015
Abstract Hematopoietic stem cells (HSC) promptly adapt hematopoiesis to stress conditions, such as infection and cancer, replenishing bone marrow–derived circulating populations, while preserving the stem cell reservoir. SOCS2, a feedback inhibitor of JAK–STAT pathways, is expressed in most primitive HSC and is upregulated in response to STAT5-inducing cytokines. We demonstrate that Socs2 deficiency unleashes HSC proliferation in vitro, sustaining STAT5 phosphorylation in response to IL3, thrombopoietin, and GM-CSF. In vivo, SOCS2 deficiency leads to unrestricted myelopoietic response to 5-fluorouracil (5-FU) and, in turn, induces exhaustion of long-term HSC function along serial bone marro…
3054 – MONOCYTE SUBSET PRODUCTION DURING AGING
2020
A growing body of evidence suggests that monocytes are more heterogenous than previously appreciated and that monocyte subsets play distinct roles in both health and disease. We have previously demonstrated that two separate pathways of monocyte production by granulocyte-monocyte progenitors (GMPs) and monocyte-dendritic cell progenitors (MDPs) yield functionally distinct monocyte subsets in mouse bone marrow. GMPs produce classical monocytes with neutrophil-like properties, and MDPs yield classical monocytes that give rise to monocyte-derived DCs (moDCs). We also showed that Toll-like receptor agonists differentially promote production of these monocyte subsets during emergency monopoiesis…
Interleukin-6 and the soluble interleukin-6 receptor induce stem cell factor and Flt-3L expression in vivo and in vitro.
2001
Abstract Objective We recently established transgenic animals expressing either interleukin-6 (IL-6) or the soluble IL-6 receptor (sIL-6R) alone, or both components, IL-6 and the sIL-6R, in the liver. This animal model demonstrated that the expression of IL-6 in combination with its sIL-6R led to extramedullary expansion of hematopoietic progenitor cells in the spleen and liver. Materials and Methods We studied other relevant hematopoietic cytokines involved in the IL-6/sIL-6R–induced stimulation of hematopoiesis. Results Using immunohistochemistry, we showed that cell-associated stem cell factor (SCF) and Flt-3L expression were upregulated in liver and spleen only in double transgenic mice…
Abstract A24: Bone marrow hematopoietic adaptation as a sensor of early, pre-invasive, epithelial malignancy
2018
Abstract Tumor development and progression is in part dependent on the ability of bystander cells, mostly of bone marrow (BM) origin, to establish a pro-tumorigenic microenvironment. We hypothesized that signs of the cross-talk between elements of the tumor microenvironment and the BM can be identified in the very early phases of cancer development, being finalized to the instruction of a tumor-promoting hematopoiesis. By integrating in situ BM histopathological and immunophenotypical analyses with flow cytometry and gene expression profiling of hematopoietic populations in a spontaneous mouse model of breast carcinogenesis (MMTV/NeuT) we investigated the occurrence and quality of modificat…
Does Ligasure(TM) Reduce Fluid Drainage in Axillary Dissection? A Randomised Prospective Clinical Trial
2007
Background: Axillary lymph node dissection (ALND) is an integral part of breast cancer treatment. It is required in about 40–50% of patients. The placement of a drain in the axilla after an operation is current surgical practice. Short surgical stay programmes increase operating efficiency and reduce medical care costs, without compromising quality of care. LigaSureTM is a new haemostatic device that uses bipolar energy to seal vessels. The aim of this study is to determine whether axillary dissection with LigaSureTM reduces the time of wound drainage, the duration of surgical intervention and the volume of drainage after treatment. Patients and methods: This study is a prospective randomiz…
Do not stress, just differentiate: role of stress proteins in hematopoiesis
2015
Hematopoiesis permits the constant regeneration of the blood system and is a permanent example of cell differentiation. Defects in its tight regulation can lead to either cell death or abnormal proliferation and may translate into multiple types of blood disorders, including leukemia. Heat shock proteins (HSPs), the expression of which is controlled by heat shock factors (HSFs, currently four known members),1 are a set of highly conserved proteins induced in response to a wide variety of physiological and environmental stress. HSP/HSF overexpression or mislocalization has been described in many cancers, particularly in hematology, and other diseases. Therefore, the involvement of HSFs/HSPs …
Early prediction of pancreatic cancer from new-onset diabetes: an Associazione Italiana Oncologia Medica (AIOM)/Associazione Medici Diabetologi (AMD)…
2021
Pancreatic cancer (PC) is a common cause of cancer-related death, due to difficulties in detecting early-stage disease, to its aggressive behaviour, and to poor response to systemic therapy. Therefore, developing strategies for early diagnosis of resectable PC is critical for improving survival. Diabetes mellitus is another major public health problem worldwide. Furthermore, diabetes can represent both a risk factor and a consequence of PC: nowadays, the relationship between these two diseases is considered a high priority for research. New-onset diabetes can be an early manifestation of PC, especially in a thin adult without a family history of diabetes. However, even if targeted screening…
Untersuchungen �ber den Einflu� des Actinomycins C (Sanamycin) auf das Blut und die blutbildenden Organe des Kaninchens sowie auf Knochenmarkskulturen
1955
Es wird uber Blutbild-, Knochenmarks-und Organbefunde von Kaninchen berichtet, die einer langeren Sanamycinbehandlung unterworfen wurden. 20 γ/kg taglich beeinflusten das Blutbild und die blutbildenden Organe nur geringgradig. 40 γ Sanamycin/kg verursachten eine Anamie mit weitgehender Aplasie des erythropoetischen Markanteils, die nach Absetzen des Mittels reversibel waren. 80 γ/kg taglich fuhrten zu einer erheblichen Beeintrachtigung des Allgemeinbefindens und einer Schadigung des gesamten Knochenmarkes. Die Grose der Milz war geringgradig, die der Lymphknoten meist stark reduziert.
The association between extremely low-frequency electromagnetic fields and childhood leukaemia in epidemiology: enough is enough?
2010
Background: Previous pooled analyses have reported an association between magnetic fields and childhood leukaemia. We present a pooled analysis based on primary data from studies on residential magnetic fields and childhood leukaemia published after 2000. Methods: Seven studies with a total of 10 865 cases and 12 853 controls were included. The main analysis focused on 24-h magnetic field measurements or calculated fields in residences. Results: In the combined results, risk increased with increase in exposure, but the estimates were imprecise. The odds ratios for exposure categories of 0.1–0.2 μT, 0.2–0.3 μT and ⩾0.3 μT, compared with <0.1 μT, were 1.07 (95% CI 0.81–1.41), 1.16 (0.69–1.93)…