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Lipopolysaccharide-induced macrophage inflammatory response is regulated by SHIP

LPS stimulates monocytes/macrophages through TLR4, resulting in the activation of a series of signaling events that potentiate the production of inflammatory mediators. Recent reports indicated that the inflammatory response to LPS is diminished by...
Authors: Fang H, Pengal RA, Cao X, Ganesan LP, Wewers MD, Marsh CB and Tridandapani S

Epigenetic silencing of the immunoglobulin heavy chain gene in classical Hodgkin lymphoma-derived cell lines contributes to the loss of immunoglobulin expression

Immunoglobulin production is impaired in Hodgkin and Reed-Sternberg (HRS) cells of classical Hodgkin lymphoma (cHL) in spite of functional clonal rearrangements. The presence of "crippling" mutations in coding and regulatory regions, as well as...
Authors: Ushmorov A, Ritz O, Hummel M, Leithauser F, Moller P, Stein H and Wirth T

Biallelic mutation of SOCS-1 impairs JAK2 degradation and sustains phospho-JAK2 action in MedB-1 mediastinal lymphoma line

Primary mediastinal B-cell lymphoma (PMBL) is a well-defined subtype of diffuse large B-cell lymphoma. Molecular cytogenetics revealed frequent gains of 9p24. JAK2, mapping in this region, is presently regarded as a candidate oncogene since...
Authors: Melzner I, Bucur AJ, Bruderlein S, Dorsch K, Hasel C, Barth TF, Leithauser F and Moller P

Engagement of ICAM-3 provides a costimulatory signal for human immunodeficiency virus type 1 replication in both activated and quiescent CD4+ T lymphocytes: implications for virus pathogenesis

Human immunodeficiency virus type 1 (HIV-1) replication is regulated by several extracellular signals. We demonstrate that intercellular adhesion molecule 3 (ICAM-3) acts as a costimulating molecule to increase HIV-1 transcription and viral...
Authors: Barat C, Gervais P and Tremblay MJ

E47, IRF-4 and PU.1 synergize to induce B cell-specific activation of the Class II Transactivator promoter III (CIITA-PIII)

In B cells, expression of CIITA and resulting major histocompatibility complex II (MHCII) is mediated exclusively by promoter III (CIITA-PIII) activation. Recent studies have established that CIITA-PIII also participates in the expression of CIITA in...
Authors: Van der Stoep N, Quinten E, Rezende MM and Van den Elsen PJ

Depletion of CD25(+) cells from human T-cell enriched fraction eliminates immunodominance during priming with dendritic cells genetically modified to express a secreted protein

The ability of dendritic cells (DCs), genetically modified with one of two types of plasmid DNA vaccines to stimulate lymphocytes from normal human donors and to generate antigen-specific responses, is compared. The first type, also called "secreted"...
Authors: Mincheff M, Zoubak S, Altankova I, Tchakarov S, Pogribnyy P, Makogonenko Y, Botev C and Meryman HT

T-cell receptor/CD28 engagement when combined with prostaglandin E2 treatment leads to potent activation of human T-cell leukemia virus type 1

Infection with human T-cell leukemia virus type 1 (HTLV-1) is characterized by long latency periods, indicating that viral gene expression is under tight control. There is presently little information available regarding the nature of extracellular...
Authors: Dumais N, Pare ME, Mercier S, Bounou S, Marriot SJ, Barbeau B and Tremblay MJ

Inositol hexakisphosphate kinase-2: A physiologic mediator of cell death

Diphosphoinositol pentakisphosphate (InsP7) and bis-diphosphoinositol tetrakisphosphate contain pyrophosphate bonds. InsP7 is formed from inositol hexakisphosphate (InsP6) by a family of three inositol hexakisphosphate kinases (InsP6K). In this study...
Authors: Nagata E, Luo HR, Saiardi A, Bae BI, Suzuki N and Snyder SH

Protein kinase C mediates retinoic acid and phorbol myristate acetate-induced phospholipid scramblase 1 gene expression: its role in leukemic cell differentiation

Although phospholipid scramblase 1 (PLSCR1) was originally identified based on its capacity to promote transbilayer movement of membrane phospholipids, subsequent studies also provided evidence for its role in cell proliferation, maturation, and...
Authors: Zhao KW, Li X, Zhao Q, Huang Y, Li D, Peng ZG, Shen WZ, Zhao J, Zhou Q, Chen Z, Sims PJ, Wiedmer T...

The BRRF1 early gene of Epstein-Barr virus encodes a transcription factor that enhances induction of lytic infection by BRLF1

The switch from the latent to the lytic form of Epstein-Barr virus (EBV) infection is mediated by expression of the viral immediate-early (IE) proteins, BZLF1 (Z) and BRLF1 (R). An EBV early protein, BRRF1 (Na), is encoded by the opposite strand of...
Authors: Hong GK, Delecluse HJ, Gruffat H, Morrison TE, Feng WH, Sergeant A and Kenney SC
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