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Results for plasma cell leukemia: Medline ( 5,258 ) | Full Text ( 853 ) | Grants ( 183 )

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Platelet-derived growth factor mediates survival of leukemic large granular lymphocytes via an autocrine regulatory pathway.

Blood 2010,Jan,07;115(1):51-60; (PMID: 19880494)
Yang, Jun ; Liu, Xin ; et al.
[...]Large granular lymphocyte (LGL) leukemia results from chronic expansion of cytotoxic T cells or natural killer (NK) cells. Apoptotic resistance resulting from constitutive activation of survival [...]Recent network modeling analyses identified platelet-derived growth factor (PDGF) as a key master switch in controlling these survival pathways in T-cell LGL leukemia. Here we show that an autocrine PDGF regulatory loop mediates survival of leukemic LGLs of both T- and NK-cell origin.[...] mediates survival of leukemic LGLs of both T- and NK-cell origin. We found high levels of circulating PDGF-BB in platelet-poor plasma samples from LGL leukemia patients. Production of PDGF-BB by leukemic LGLs was demonstrated by immunocytochemical staining[...]

IgE-type multiple myeloma with the late development of IgA2 kappa and plasma cell leukaemia.

Pathology 2010,Jan,01;42(1):82-4; (PMID: 20025486)

R-roscovitine (Seliciclib) affects CLL cells more strongly than combinations of fludarabine or cladribine with cyclophosphamide: Inhibition of CDK7 sensitizes leukemic cells to caspase-dependent apoptosis.

J Cell Biochem 2010,Jan,01;109(1):217-35; (PMID: 19911397)
[...]Chronic lymphocytic leukemia (CLL) is characterized by the accumulation of malignant, apoptosis-resistant B CD19(+)/CD5(+) cells.[...] also induced strong activation of the apoptosome and effector caspases in CLL cells. During progression of apoptosis the plasma membrane became permeable, resulting in the release of activated caspases into the culture medium. Leukemic cells were more sensitive to [...] cells were observed, explaining the variations in patients' sensitivity to therapy. J. Cell. Biochem. 109: 217-235, 2010. (c) 2009 Wiley-Liss, Inc.

Pharmacokinetics, bioavailability and effects on electrocardiographic parameters of oral fludarabine phosphate.

Biopharm Drug Dispos 2010,Jan,01;31(1):72-81; (PMID: 19862681)
[...]fludarabine phosphate (2F-ara-AMP) were evaluated in adult patients with B-cell chronic lymphocytic leukemia. Patients received single doses of intravenous (IV) (25 mg/m(2), n=14) or oral (40 mg/m(2), n=42) [...]Plasma concentrations of drug and metabolites and digital 12-lead ECGs were monitored for 23 h after dosing. The dephosphorylated product fludarabine (2F-ara-A) was the principal metabolite present in the systemic circulation. Mean (+/-SD) elimination half-life did not differ significantly between IV and oral dosage groups (11.3+/-4.0 vs 9.7+/-2.0 h, p=0.053).[...]

Nuclear expression of sox11 is highly associated with mantle cell lymphoma but is independent of t(11;14)(q13;q32) in non-mantle cell B-cell neoplasms.

Mod Pathol 2010,Jan,01;23(1):105-12; (PMID: 19801969)
[...] is presently unknown. Recent studies have shown the nuclear expression of sox11 in mantle cell lymphoma, which raises the question about its possible association with t(11;14)(q13;q32), the genetic hallmark of [...] in the cytoplasm, but no nuclear positivity. Sox11 was then examined in plasma cell myeloma and hairy cell leukemia as a subset of plasma cell myeloma carry t(11;14) and overexpress cyclin D1, and [...]

1p21 deletions are strongly associated with 1q21 gains and are an independent adverse prognostic factor for the outcome of high-dose chemotherapy in patients with multiple myeloma.

Bone Marrow Transplant 2010,Jan,01;45(1):117-21; (PMID: 19448682)
Chang, H ; Qi, X ; et al.
[...]monoclonal gammopathy of undetermined significance (MGUS) and 41 patients with plasma cell leukemia (PCL). FISH combined with cytoplasmic light chain detection (cIg-FISH) detected hemizygous 1p21 deletions[...]

Recruitment of PKC-betaII to lipid rafts mediates apoptosis-resistance in chronic lymphocytic leukemia expressing ZAP-70.

Leukemia 2010,Jan,01;24(1):141-52; (PMID: 19907441)
[...] is a key signaling molecule in T cells. It couples the antigen-activated T-cell receptor to downstream signaling pathways. Its expression in leukemic B-cells derived from a subgroup of patients with [...]Its expression in leukemic B-cells derived from a subgroup of patients with chronic lymphocytic leukemia (CLL) is associated with an aggressive course of the disease. However, its implication for the pathogenesis of aggressive [...] enhances the signals associated with the B-cell receptor, recruiting protein kinase C-betaII (PKC-betaII) into lipid raft domains. Subsequently, PKC-betaII is activated and shuttles from the plasma membrane to the mitochondria. We unravel that the antiapoptotic protein Bcl-2 and its antagonistic BH3-protein Bim(EL) are putative substrates for PKC-betaII.[...]

Targeting of murine leukemia virus gag to the plasma membrane is mediated by PI(4,5)P2/PS and a polybasic region in the matrix.

J Virol 2010,Jan,01;84(1):503-15; (PMID: 19828619)
[...]human immunodeficiency virus Gag proteins is dependent on phosphatidylinositol-(4,5)-bisphosphate [PI(4,5)P(2)] located in the plasma membrane. In order to determine if evolutionarily distant retroviral Gag proteins are targeted by a similar mechanism, we generated mutants of the matrix (MA) domain of [...] by a similar mechanism, we generated mutants of the matrix (MA) domain of murine leukemia virus (MuLV) Gag, examined their binding to membrane models in vitro, and analyzed their phenotypes in [...]) Gag, examined their binding to membrane models in vitro, and analyzed their phenotypes in cell culture. In vitro, we showed that MA bound all the phosphatidylinositol phosphates with significant affinity but displayed a strong specificity for PI(4,5)P(2) only if enhanced by [...]

Chemokine induction by all-trans retinoic acid and arsenic trioxide in acute promyelocytic leukemia: triggering the differentiation syndrome.

Blood 2009,Dec,24;114(27):5512-21; (PMID: 19828696)
[...]In acute promyelocytic leukemia (APL), differentiation therapy with all-trans retinoic acid (ATRA) and/or arsenic trioxide[...] cell line NB4 induced expression of multiple CC-chemokines (CCLs) and their receptors (> 19-fold), resulting in increased chemokine levels and chemotaxis. Induction of CCL2 and CCL24 was directly mediated by ligand-activated retinoic acid receptors.[...]APL patients at diagnosis, ATRA induced chemokine production as well. Furthermore, in plasma of an APL patient with DS, we observed chemokine induction, suggesting that chemokines might be important in DS.[...]

Citrulline as a marker for chemotherapy induced mucosal barrier injury in pediatric patients.

Pediatr Blood Cancer 2009,Dec,15;53(7):1188-94; (PMID: 19688831)
[...]We searched for objective, easily measurable indicators for MBI in children with cancer. PURPOSE: In children with acute myeloid leukemia, various MBI-related clinical and laboratory tests were investigated, reflecting clinical severity (NCI symptomatic adverse events criteria ([...], various MBI-related clinical and laboratory tests were investigated, reflecting clinical severity (NCI symptomatic adverse events criteria (gold standard), daily gut score (DGS)), inflammation (plasma and fecal interleukin-8 (IL-8), fecal calprotectin), enterocytic loss (plasma citrulline, ratio fecal human DNA/total DNA) and [...] cycles, correlating well with the continuous DGS (n = 55, rho = 0.581; P < 0.001). Intestinal cell loss as measured by the ratio fecal human DNA/total DNA and plasma citrulline correlated well with both NCI criteria (n = 61, rho = 0.357, P = 0.005 resp. n = 58, rho = -0.482; P < 0.001) and DGS (n = 54, rho = 0.352, P = 0.009 resp. n = 55, rho = -0.625; P < 0.001).[...]
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