Search results for "heat shock"

Heat Shock Protein-60 and Risk for Cardiovascular Disease

2011

Cardiovascular disease (CVD) is a leading cause of morbidity and mortality worldwide. There is growing evidence that molecularchaperones, many of which are heat shock proteins HSPs, are involved in CVD pathogenesis. In this review we focus on HSP60,the human mitochondrial chaperone that also displays extramitochondrial and extracellular functions. HSP60 is typically cytoprotectivebut a number of stress conditions determine its conversion to a potentially toxic molecule for cells and tissues. We present illustrative examplesof specific subtypes of CVD where HSP60 is implicated in the initiation and/or progression of disease. The data not only indicatea pathogenic role for HSP60 but also its …

Transcriptomic and Proteomic Approach for Understanding the Molecular Basis of Adaptation of Saccharomyces cerevisiae to Wine Fermentation

2006

ABSTRACT Throughout alcoholic fermentation, Saccharomyces cerevisiae cells have to cope with several stress conditions that could affect their growth and viability. In addition, the metabolic activity of yeast cells during this process leads to the production of secondary compounds that contribute to the organoleptic properties of the resulting wine. Commercial strains have been selected during the last decades for inoculation into the must to carry out the alcoholic fermentation on the basis of physiological traits, but little is known about the molecular basis of the fermentative behavior of these strains. In this work, we present the first transcriptomic and proteomic comparison between …

Hyperphosphorylation of Msn2p and Msn4p in response to heat shock and the diauxic shift is inhibited by cAMP in Saccharomyces cerevisiae.

2000

In response to various stresses, as well as during the diauxic transition, the Msn2p and Msn4p transcription factors of Saccharomyces cerevisiae are activated and induce a large set of genes. This activation is inhibited by the Ras/cAMP/PKA (cAMP-dependent protein kinase) pathway. Here we show by immunoblotting experiments that Msn2p and Msn4p are phosphorylated in vivo during growth on glucose, and become hyperphosphorylated at the diauxic transition and upon heat shock. This hyperphosphorylation is correlated with activation of Msn2/4p-dependent transcription. An increased level of cAMP prevents and reverses these hyperphosphorylations, indicating that kinases other than PKA are involved.…

Depletion of polyubiquitin encoded by the UBI4 gene confers pleiotropic phenotype to Candida albicans cells.

2003

We have studied the roles of polyubiquitin in Candida albicans physiology. Heterologous expression of the C. albicans polyubiquitin (UBI4) gene in a ubi4 Saccharomyces cerevisiae strain suppressed the mutant phenotype (hypersensitivity to heat shock). A heterozygous strain UBI4/Deltaubi4::hisG, obtained following the ura-blaster procedure, was used to construct a conditional mutant using a pCaDis derivative plasmid. By serendipity we isolated the UBI4 conditional mutant as well as a UBI4 mutant containing a non-functional MET3 promoter. Depletion of polyubiquitin conferred pleiotropic effects to mutant cells: (i) a limited increased sensitivity to mild heat shock; (ii) increased formation o…

Is chlamydial heat shock protein 60 a risk factor for oncogenesis?

2004

Heat shock protein 60 (HSP60) plays an important role in the protein folding of prokaryotic and eukaryotic cells. Most of the papers published on chlamydial HSP60 concern its role in immune response during infection. In the last decade, exposure to Chlamydia trachomatis has been consistently associated with the development of cervical and ovarian cancer. Moreover, it has been suggested that chlamydial HSP60 may have an anti- apoptotic effect during persistent infection. We hypothesize that the accumulation of exogenous chlamydial HSP60 in the cytoplasm of actively replicating eukaryotic cells may interfere with the regulation of the apoptotic pathway. The concomitant expression of viral onc…

Antioxidant response, induced by the invasive algae Caulerpa distichophylla and C. racemosa, in the sea urchin Paracentrotus lividus

2014

HEAT SHOCK POTEINS (HSP) IN BRACHIDONTES PHARAONIS (MOLLUSCA, BIVALVIA) AT VARYING TEMPERATURES

2008

Variations in cardiac activity and heat shock proteins in congeneric Mediterranean limpets: connection between thermal stress and different zonation

2014

Curcumin-Like Compounds as Neuroprotective Agents: Interactions with HSP60 and Amyloid Beta Peptide

2014

Alzheimer’s Disease (AD) represents a fundamental challenge for public health in the 21st century. Current AD therapies largely focus on symptomatic aspects of the clinical pathology, but they have yet to demonstrate any major impact on the disease progression [1]. The most important role of the research aimed at fighting the AD is the development of neuro-protective agents, able to interfere with the protein aggregation process whose clinical signature is represented by the plaques deposition. An important role in AD’s framework could be played by Heat shock proteins (HSPs), highly regulated proteins that mediate the proteins proper folding and promote recovery of their native conformation…

Composti curcumin-like come agenti neuro-protettori. Interazione con HSP60

2014

La Malattia di Alzheimer rappresenta una sfida fondamentale del XXI secolo per la salute pubblica. Le terapie attualmente utilizzate per la cura dell’Alzheimer si basano sugli aspetti sintomatici della patologia [1]. Un importante ruolo nella malattia è rivestito dalle Heat shock proteins (HSPs), proteine che presiedono al controllo del ripiegamento proteico [2]. Recentemente, è stato dimostrato che HSP60 media la traslocazione del Precursore della Proteina Amiloide (APP) e del Peptide Beta Amiloide (Aβ) nei mitocondri, portando alla perdita della funzionalità dell’organulo [3]. Nel campo degli approcci delle terapie potenziali, la curcumina sta emergendo come lead compound per lo sviluppo …