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Transforming growth factor-beta-mediated chondrogenesis of human mesenchymal progenitor cells involves N-cadherin and mitogen-activated protein kinase and Wnt signaling cross-talk

The multilineage differentiation potential of adult tissue-derived mesenchymal progenitor cells (MPCs), such as those from bone marrow and trabecular bone, makes them a useful model to investigate mechanisms regulating tissue development and...
Authors: Tuli R, Tuli S, Nandi S, Huang X, Manner PA, Hozack WJ, Danielson KG, Hall DJ and Tuan RS

GATA-3 in Human T Cell Helper Type 2 Development

The delineation of the in vivo role of GATA-3 in human T cell differentiation is a critical step in the understanding of molecular mechanisms directing human immune responses. We examined T cell differentiation and T cell-mediated effector functions...
Authors: Skapenko A, Leipe J, Niesner U, Devriendt K, Beetz R, Radbruch A, Kalden JR, Lipsky PE and...

Differential localization and function of ADP-ribosylation factor-6 in anergic human T cells: a potential marker for their identification

Anergy is a state of immunologic tolerance in which T cells are viable but incapable of responding to antigenic stimulation. Recent data indicate that anergic cells have a distinct gene expression program that determines their unique function. In...
Authors: Tzachanis D, Appleman LJ, van Puijenbroek AAFL, Berezovskaya A, Nadler LM and Boussiotis VA

Nonmuscle Myosin IIB is involved in the guidance of fibroblast migration

Although myosin II is known to play an important role in cell migration, little is known about its specific functions. We have addressed the function of one of the isoforms of myosin II, myosin IIB, by analyzing the movement and mechanical...
Authors: Lo CM, Buxton DB, Chua GCH, Dembo M, Adelstein RS and Wang YL

Combined spatial and enzymatic regulation of Csk by cAMP and protein kinase A inhibits T cell receptor signaling

Raft-associated Csk controls signaling through the T cell receptor (TCR) and was mainly anchored to Cbp/PAG (phosphoprotein associated with glycosphingolipid-enriched membrane domains). Treatment of cells with the cAMP-elevating agent prostaglandin...
Authors: Vang T, Abrahamsen H, Myklebust S, Horejesi V and Taskén K

Novel single chain cAMP sensors for receptor-induced signal propagation

Cyclic adenosine monophosphate (cAMP) is a universal second messenger of many G-protein-coupled receptors and regulates a wide variety of cellular events. cAMP exerts its effects via cAMP-dependent protein kinase (PKA), cAMP-gated ion channels and...
Authors: Nikolaev VO, Bunemann M, Hein L, Hannawacker A and Lohse MJ

A central role for the Jun-N-terminal kinase pathway in mediating the antagonistic activity of pro-inflammatory cytokines against transforming growth factor-beta-driven Smad3/4 specific gene expression

We have focused our attention on the molecular events underlying the antagonistic activities of pro-inflammatory cytokines against transforming growth factor-beta (TGF-beta)/SMAD signaling. Using jnk1/2-knockout (jnk(-/-)) and I kappa B...
Authors: Verrecchia F, Tacheau C, Wagner EF and Mauviel A

Expression of focal adhesion kinase in acute myeloid leukemia is associated with enhanced blast migration, increased cellularity and poor prognosis

Focal adhesion kinase (FAK) is a nonreceptor tyrosine kinase playing an important role in cell motility and survival. However, very little is known about FAK in normal and leukemic myeloid cells. In this study, FAK protein expression and mRNA were...
Authors: Recher C, Ysebaert L, Beyne-Rauzy O, Mansat-De Mas V, Ruidavets JB, Cariven P, Demur C, Payrastre B,...

Distinct involvement of the Jun-N-terminal kinase and NF-kappaB pathways in the expression of the human COL1A2 gene by TNF-alpha

We used a gene knockout approach to elucidate the specific roles played by the Jun-N-terminal kinase (JNK) and NF-kappaB pathways downstream of TNF-alpha in the context of alpha(2) type I collagen gene (COL1A2) expression. In JNK1-/--JNK2-/- (JNK-/-)...
Authors: Verrecchia F, Wagner EF and Mauviel A

Functional and biochemical dissection of the structure-specific nuclease ARTEMIS

During V(D)J recombination, the RAG1 and RAG2 proteins form a complex and initiate the process of rearrangement by cleaving between the coding and signal segments and generating hairpins at the coding ends. Prior to ligation of the coding ends by DNA...
Authors: Pannicke U, Ma Y, Hopfner KP, Niewolik D, Lieber MR, Schwarz K
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