sphingosine/sarcoma

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Enhanced phosphorylation of sphingosine and ceramide sustains the exuberant proliferation of endothelial progenitors in Kaposi sarcoma.

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Endothelial colony-forming cells (ECFCs), a unique endothelial stem cell population, are highly increased in the blood of Kaposi sarcoma (KS) patients. KS-derived ECFCs (KS-ECFCs) are also endowed with increased proliferative and vasculogenic potential, thus suggesting that they may be precursors of

Modulating Sphingosine-1-Phosphate receptors to improve chemotherapy efficacy against Ewing sarcoma.

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Tumor vasculature is innately dysfunctional. Poorly functional tumor vessels inefficiently deliver chemotherapy to tumor cells; vessel hyper-permeability promotes chemotherapy delivery primarily to a tumor's periphery. Here we identify a method for enhancing chemotherapy efficacy in Ewing sarcoma

Cytotoxic effects of sphingolipids as single or multi-modality agents on human melanoma and soft tissue sarcoma in vitro.

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We evaluated the cytotoxic effects of a cell-permeable ceramide (Cer), N-hexanoyl-D-sphingosine (C6-Cer) and of two related sphingoid bases, sphingosine (So) and dihydrosphingosine (sphinganine; Sa) on human melanoma cell lines and on soft tissue sarcoma lines recently established from fresh

Sphingosine-1-phosphate receptor 1 is a useful adjunct for distinguishing vascular neoplasms from morphological mimics.

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Sphingosine-1-phosphate receptor 1 (S1P(1)) has been shown to play an important role in the migration, proliferation, and survival of endothelial cells. S1P(1) of vascular and lymphatic endothelial cells can be detected by immunostaining of paraffin-embedded sections using a rabbit anti-S1P(1)

[Effect of sphingosine-1-phosphate on chemotherapy-induced ovarian damage and on the efficacy of chemotherapy in mice bearing S180 tumor].

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OBJECTIVE To investigate the effects of sphingosine-1-phosphate (S1P) on cyclophosphamid (CTX) and cisplatin (DDP)-induced ovarian damage and on the efficacy of chemotherapy in mice bearing S180 murine sarcoma. METHODS Fifty-two female C57BL/6 mice were randomized into normal control group (n=10),

Humoral factors of ascites sarcoma 180 stimulate osteoblastic UMR 106-01 cell proliferation and bone resorption via signal transduction pathways, which are clearly different from those of parathyroid hormone.

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Ascites sarcoma 180 (S180A) is a transplantable tumor that induces hypercalcemia in tumor-bearing mice and stimulates bone resorption in cultured neonatal mouse calvaria without parathyroid hormone (PTH)-like activity. The serum-free conditioned media of S180A cell cultures (S180A-CM) stimulated

Sphingosine kinase-2 maintains viral latency and survival for KSHV-infected endothelial cells.

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Phosphorylation of sphingosine by sphingosine kinases (SphK1 and SphK2) generates sphingosine-1-phosphate (S1P), a bioactive sphingolipid which promotes cancer cell survival and tumor progression in vivo. We have recently reported that targeting SphK2 induces apoptosis for human primary effusion

Sphingosine Induces Apoptosis and Down-regulation of MYCN in PAX3-FOXO1-positive Alveolar Rhabdomyosarcoma Cells Irrespective of TP53 Mutation.

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Rhabdomyosarcoma is the most common type of pediatric soft-tissue sarcoma. Among the subsets of this disease, alveolar rhabdomyosarcoma (ARMS) expressing paired box 3 (PAX3) and forkhead box O1 (PAX3-FOXO1) fusion oncoprotein has the worst prognosis. The goal of this study was to investigate the

ABC294640, A Novel Sphingosine Kinase 2 Inhibitor, Induces Oncogenic Virus-Infected Cell Autophagic Death and Represses Tumor Growth.

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Kaposi sarcoma-associated herpes virus (KSHV) is the etiologic agent of several malignancies, including Kaposi sarcoma and primary effusion lymphoma (PEL), which preferentially arise in HIV+ patients and lack effective treatment. Sphingosine kinase 2 (SphK2) is a key factor within sphingolipid

Targeting sphingosine kinase induces apoptosis and tumor regression for KSHV-associated primary effusion lymphoma.

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Sphingosine kinase (SPHK) is overexpressed by a variety of cancers, and its phosphorylation of sphingosine results in accumulation of sphingosine-1-phosphate (S1P) and activation of antiapoptotic signal transduction. Existing data indicate a role for S1P in viral pathogenesis, but roles for SPHK and

Vascular modulation through exercise improves chemotherapy efficacy in Ewing sarcoma.

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Recent studies in mouse models of cancer have shown that exercise improves tumor vascular function, thereby improving chemotherapy delivery and efficacy. However, the mechanisms underlying this improvement remain unclear and the effect of exercise on Ewing sarcoma (ES), a pediatric bone and soft

Quantifying Fluorescently Labeled Ceramide Levels in Human Sarcoma Cell Lines in Response to a Sphingomyelin Synthase Inhibitor.

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Sphingolipid metabolism is an important process in sustaining the growth needs of rapidly dividing cancer cells. Enzymes that synthesize sphingolipids have become attractive targets in cancer pharmacology. Ceramide is a precursor for synthesizing sphingolipids such as sphingomyelin,

G Protein-Coupled Receptor and RhoA-Stimulated Transcriptional Responses: Links to Inflammation, Differentiation, and Cell Proliferation.

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The low molecular weight G protein RhoA (rat sarcoma virus homolog family member A) serves as a node for transducing signals through G protein-coupled receptors (GPCRs). Activation of RhoA occurs through coupling of G proteins, most prominently, G12/13, to Rho guanine nucleotide exchange factors.

The human retinoblastoma gene product suppresses ceramide-induced apoptosis in human bladder tumor cells.

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The retinoblastoma gene product, Rb, has previously been implicated as an obligatory component in the antiproliferative effects mediated by the lipid second messenger, ceramide. We have evaluated both the apoptotic effects and the effects on cell cycle distribution of the exogenous cell-permeable

[The changes in the sphingenine/sphinganine ratio in sphingolipids of transplantable rat tumors depends on a transplantation organ].

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The content of sphingenine (sphingosine) and sphinganine was determined in the total pool of sphingomyelin and ceramide in the rat tumors transplanted subcutaneously and intrahepatically. The sphingenine/sphinganine ratio in the subcutaneously transplanted sarcoma M1 and cholangiocellular carcinoma

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