scholarly journals Formal Methods for Biochemical Signalling Pathways

2009 ◽  
pp. 185-215 ◽  
Author(s):  
Muffy Calder ◽  
Stephen Gilmore ◽  
Jane Hillston ◽  
Vladislav Vyshemirsky
Keyword(s):  
Formal Methods ◽  
Signalling Pathways

Caspases and apoptosis

2002 ◽  
Vol 38 ◽  
pp. 9-19 ◽  
Author(s):  
Guy S Salvesen
Keyword(s):  
Cysteine Proteases ◽  
Signalling Pathways ◽  
Term Survival ◽  
Mature Adult ◽  
Intracellular Signalling Pathways ◽  
Adult Cell ◽  
Caspase Family ◽  
Cell Fragments ◽  
Pro Inflammatory Cytokines

The ability of metazoan cells to undergo programmed cell death is vital to both the precise development and long-term survival of the mature adult. Cell deaths that result from engagement of this programme end in apoptosis, the ordered dismantling of the cell that results in its 'silent' demise, in which packaged cell fragments are removed by phagocytosis. This co-ordinated demise is mediated by members of a family of cysteine proteases known as caspases, whose activation follows characteristic apoptotic stimuli, and whose substrates include many proteins, the limited cleavage of which causes the characteristic morphology of apoptosis. In vertebrates, a subset of caspases has evolved to participate in the activation of pro-inflammatory cytokines, and thus members of the caspase family participate in one of two very distinct intracellular signalling pathways.

Nutrient-regulated gene expression in eukaryotes

2006 ◽  
Vol 73 ◽  
pp. 85-96 ◽  
Author(s):  
Richard J. Reece ◽  
Laila Beynon ◽  
Stacey Holden ◽  
Amanda D. Hughes ◽  
Karine Rébora ◽  
...  
Keyword(s):  
Gene Expression ◽  
Rna Polymerase ◽  
Rna Polymerase Ii ◽  
Transcriptional Control ◽  
Direct Interaction ◽  
Signalling Pathways ◽  
A Cell ◽  
One Step ◽  
Higher Eukaryotes ◽  
Regulated Gene Expression

The recognition of changes in environmental conditions, and the ability to adapt to these changes, is essential for the viability of cells. There are numerous well characterized systems by which the presence or absence of an individual metabolite may be recognized by a cell. However, the recognition of a metabolite is just one step in a process that often results in changes in the expression of whole sets of genes required to respond to that metabolite. In higher eukaryotes, the signalling pathway between metabolite recognition and transcriptional control can be complex. Recent evidence from the relatively simple eukaryote yeast suggests that complex signalling pathways may be circumvented through the direct interaction between individual metabolites and regulators of RNA polymerase II-mediated transcription. Biochemical and structural analyses are beginning to unravel these elegant genetic control elements.

Application of formal methods to the VIPER microprocessor

1987 ◽  
Vol 134 (3) ◽  
pp. 133 ◽  
Author(s):  
W.J. Cullyer ◽  
C.H. Pygott
Keyword(s):  
Formal Methods

PBF is a component of the molecular signalling pathways that drive hyperplastic and neoplastic thyroid growth

2014 ◽  
Author(s):  
Vicki Smith ◽  
Martin Read ◽  
Rachel Watkins ◽  
Vikki Poole ◽  
Bhavika Modasia ◽  
...  
Keyword(s):  
Signalling Pathways ◽  
Molecular Signalling Pathways

Insulin dynamics and its associated signalling pathways in equids predisposed to laminitis

2014 ◽  
Author(s):  
Amy Timpson ◽  
Jonathan Elliott ◽  
Patricia Harris ◽  
Amanda de Mestre ◽  
Nicola Menzies-Gow
Keyword(s):  
Signalling Pathways

MOLECULAR CONTROL OF ARTICULAR CARTILAGE DEGENERATION BY TRANSFORMING GROWTH FACTOR ALPHA

2008 ◽  
Vol 31 (4) ◽  
pp. 2
Author(s):  
Tom Appleton ◽  
Shirine Usmani ◽  
John Mort ◽  
Frank Beier
Keyword(s):  
Gene Expression ◽  
Articular Cartilage ◽  
Growth Factor ◽  
P38 Mapk ◽  
Transforming Growth Factor ◽  
Cartilage Degeneration ◽  
Signalling Pathways ◽  
Transforming Growth Factor Alpha ◽  
Factor Alpha ◽  
Articular Cartilage Degeneration

Background: Articular cartilage degeneration is a hallmark of osteoarthritis (OA). We previously identified increased expression of transforming growth factor alpha (TGF?) and chemokine (C-C motif) ligand 2 (CCL2) in articular cartilage from a rat modelof OA (1,2). We subsequently reported that TGF? signalling modified chondrocyte cytoskeletal organization, increased catabolic and decreased anabolic gene expression and suppressed Sox9. Due to other roles in chondrocytes, we hypothesized that the effects ofTGF? on chondrocytes are mediated by Rho/ROCK and MEK/ERK signaling pathways. Methods: Primary cultures of chondrocytes and articularosteochondral explants were treated with pharmacological inhibitors of MEK1/2(U0126), ROCK (Y27632), Rho (C3), p38 MAPK (SB202190) and PI3K (LY294002) to elucidate pathway involvement. Results: Using G-LISA we determined that stimulation of primary chondrocytes with TGF? activates RhoA. Reciprocally, inhibition of RhoA/ROCK but not other signalling pathways prevents modification of the actin cytoskeleton in responseto TGF?. Inhibition of MEK/ERKsignaling rescued suppression of anabolic gene expression by TGF? including SOX9 mRNA and protein levels. Inhibition of MEK/ERK, Rho/ROCK, p38 MAPK and PI3K signalling pathways differentially controlled the induction of MMP13 and TNF? gene expression. TGF? also induced expression of CCL2 specifically through MEK/ERK activation. In turn, CCL2 treatment induced the expression of MMP3 and TNF?. Finally, we assessed cartilage degradation by immunohistochemical detection of type II collagen cleavage fragments generated by MMPs. Blockade of RhoA/ROCK and MEK/ERK signalling pathways reduced the generation of type IIcollagen cleavage fragments in response to TGF? stimulation. Conclusions: Rho/ROCK signalling mediates TGF?-induced changes inchondrocyte morphology, while MEK/ERK signalling mediates the suppression ofSox9 and its target genes, and CCL2 expression. CCL2, in turn, induces the expression of MMP3 and TNF?, two potent catabolic factors known to be involved in OA. These pathways may represent strategic targets for interventional approaches to treating cartilage degeneration in osteoarthritis. References: 1. Appleton CTG et al. Arthritis Rheum 2007;56:1854-68. 2. Appleton CTG et al. Arthritis Rheum 2007; 56:3693-705.

Sign in / Sign up

Export Citation Format

Share Document