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4853 results sorted by

The warburg effect in leukemia-stroma cocultures is mediated by mitochondrial uncoupling associated with uncoupling protein 2 activation

In 1956, Otto Warburg proposed that the origin of cancer cells was closely linked to a permanent respiratory defect that bypassed the Pasteur effect (i.e., the inhibition of anaerobic fermentation by oxygen). Since then, permanent defects in oxygen...
Authors: Samudio I, Fiegl M, McQueen T, Clise-Dwyer K, Andreeff M

CLEC5A is critical for dengue-virus-induced lethal disease

Dengue haemorrhagic fever and dengue shock syndrome, the most severe responses to dengue virus (DV) infection, are characterized by plasma leakage (due to increased vascular permeability) and low platelet counts. CLEC5A (C-type lectin domain family...
Authors: Chen ST, Lin YL, Huang MT, Wu MF, Cheng SC, Lei HY, Lee CK, Chiou TW, Wong CH, Hsieh SL

Signaling through ephrin-A ligand leads to activation of Src-family kinases, Akt phosphorylation, and inhibition of antigen receptor-induced apoptosis

Eph receptor tyrosine kinases and ephrins play important roles in diverse biological processes such as migration, adhesion, and angiogenesis. Forward and reverse signaling has been reported in receptor- and ligand-bearing cells. The ligands can be...
Authors: Holen HL, Shadidi M, Narvhus K, Kjܸsnes O, Tierens A, Aasheim HC

The malaria secretome: from algorithms to essential function in blood stage infection

The malaria agent Plasmodium falciparum is predicted to export a "secretome" of several hundred proteins to remodel the host erythrocyte. Prediction of protein export is based on the presence of an ER-type signal sequence and a downstream...
Authors: van Ooij C, Tamez P, Bhattacharjee S, Hiller NL, Harrison T, Liolios K, Kooij T, Ramesar J, Balu B,...

Ameobal pathogen mimivirus infects macrophages through phagocytosis

Mimivirus, or Acanthamoeba polyphaga mimivirus (APMV), a giant double-stranded DNA virus that grows in amoeba, was identified for the first time in 2003. Entry by phagocytosis within amoeba has been suggested but not demonstrated. We demonstrate here...
Authors: Ghigo E, Kartenbeck J, Lien P, Pelkmans L, Capo C, Mege JL, Raoult D

IFN-alpha induces transcription of hypoxia-inducible factor-1alpha to inhibit proliferation of human endothelial cells

Expression of hypoxia-inducible factor (HIF)-1alpha, a transcription factor subunit increased by protein stabilization in response to hypoxia, is increased in human endothelial cells (ECs) by IFN-alpha under normoxic conditions. IFN-alpha increases...
Authors: Gerber SA, Pober JS

UVA-induced cell cycle progression is mediated by a disintegrin and metalloprotease/epidermal growth factor receptor/AKT/Cyclin D1 pathways in keratinocytes

UVA (315-400 nm), which constitutes approximately 95% of the UV irradiation in natural sunlight, represents a major environmental challenge to the skin and is clearly associated with human skin cancer. Here, we show that a low, nonlethal dose of UVA...
Authors: He YY, Council SE, Feng L, Chignell CF
SST Peer Reviewed

A sporozoite asparagine-rich protein controls initiation of Plasmodium liver stage development

Plasmodium sporozoites invade host hepatocytes and develop as liver stages (LS) before the onset of erythrocytic infection and malaria symptoms. LS are clinically silent, and constitute ideal targets for causal prophylactic drugs and vaccines. The...
Authors: Silvie O, Goetz K, Matuschewski K

Histone acetylation and flagellin are essential for Legionella pneumophila-induced cytokine expression

Legionella pneumophila causes severe pneumonia. Acetylation of histones is thought to be an important regulator of gene transcription, but its impact on L. pneumophila-induced expression of proinflammatory cytokines is unknown. L. pneumophila strain...
Authors: Schmeck B, Lorenz J, N'guessan PD, Opitz B, van Laak V, Zahlten J, Slevogt H, Witzenrath M, Flieger...

A Plasmodium falciparum host-targeting motif functions in export during blood stage infection of the rodent malarial parasite Plasmodium berghei

Plasmodium falciparum (P. falciparum) secretes hundreds of proteins--including major virulence proteins--into the host erythrocyte. In order to reach the host cytoplasm, most P. falciparum proteins contain an N terminal host-targeting (HT) motif...
Authors: MacKenzie JJ, Gomez ND, Bhattacharjee S, Mann S, Haldar K